WO2014077341A1 - 芳香族ポリカーボネート樹脂組成物 - Google Patents
芳香族ポリカーボネート樹脂組成物 Download PDFInfo
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- WO2014077341A1 WO2014077341A1 PCT/JP2013/080845 JP2013080845W WO2014077341A1 WO 2014077341 A1 WO2014077341 A1 WO 2014077341A1 JP 2013080845 W JP2013080845 W JP 2013080845W WO 2014077341 A1 WO2014077341 A1 WO 2014077341A1
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- carbon atoms
- aromatic polycarbonate
- general formula
- halogen atom
- polycarbonate resin
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- MGNZXYYWBUKAII-UHFFFAOYSA-N C1C=CC=CC1 Chemical compound C1C=CC=CC1 MGNZXYYWBUKAII-UHFFFAOYSA-N 0.000 description 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N c1ccccc1 Chemical compound c1ccccc1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/04—Aromatic polycarbonates
- C08G64/06—Aromatic polycarbonates not containing aliphatic unsaturation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/20—General preparatory processes
- C08G64/30—General preparatory processes using carbonates
- C08G64/307—General preparatory processes using carbonates and phenols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/40—Post-polymerisation treatment
- C08G64/406—Purifying; Drying
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/42—Chemical after-treatment
Definitions
- the present invention relates to an aromatic polycarbonate resin composition and a method for producing the same. More specifically, the present invention relates to an aromatic polycarbonate resin composition having a high molecular weight, few heterogeneous structures, good quality, and excellent thermal stability, and an improved production method thereof.
- polycarbonate has been widely used in many fields in recent years because it is excellent in heat resistance, impact resistance and transparency. Many studies have been made on the production method of this polycarbonate. Among them, polycarbonates derived from aromatic dihydroxy compounds such as 2,2-bis (4-hydroxyphenyl) propane (hereinafter referred to as “bisphenol A”) are produced by both the interfacial polymerization method and the melt polymerization method. Industrialized.
- bisphenol A 2,2-bis (4-hydroxyphenyl) propane
- polycarbonate is produced from bisphenol A and phosgene, but toxic phosgene must be used.
- by-product hydrogen chloride and sodium chloride, and chlorine-containing compounds such as methylene chloride used in large quantities as solvents the equipment is corroded, and impurities such as sodium chloride and residual methylene chloride that affect polymer properties are removed. Difficult things, and a large amount of wastewater, the problem of wastewater treatment remains a problem.
- a method for producing a polycarbonate from an aromatic dihydroxy compound and diaryl carbonate for example, bisphenol A and diphenyl carbonate can be melted by polymerizing while removing the by-produced aromatic monohydroxy compound by a transesterification reaction in a molten state.
- Legal has been known for a long time.
- the melt polymerization method has the advantage of not using a solvent.
- the viscosity of the polymer in the system increases rapidly, and the by-product aromatic monohydroxy compound is efficiently produced. It is difficult to remove out of the system well, and there is an essential problem that the reaction rate is extremely lowered and it is difficult to increase the degree of polymerization.
- Patent Document 1 Japanese Patent Publication No. 50-19600 discloses a screw-type polymerization apparatus having a vent portion
- Patent Document 2 Japanese Patent Application Laid-Open No. 2-153923 discloses a combination of a thin film evaporator and a horizontal polymerization apparatus. A method of using is also disclosed.
- Patent Document 3 U.S. Pat. No. 5,521,275 discloses a method in which the molecular weight conversion of an aromatic polycarbonate is performed under reduced pressure conditions using an extruder having a polymer seal portion and a vent portion in the presence of a catalyst. Has been.
- Patent Document 4 European Patent No. 0595608 discloses a method in which several diaryl carbonates are reacted at the time of molecular weight conversion, but a significant increase in molecular weight cannot be obtained.
- Patent Document 5 US Pat. No. 5,696,222 describes certain polymerization accelerators such as bis (2-methoxyphenyl) carbonate, bis (2-ethoxyphenyl) carbonate, bis (2-chlorophenyl).
- Patent Document 5 teaches that when an ester compound is used as a polymerization accelerator, an ester bond is introduced, resulting in the formation of a polyester carbonate copolymer (instead of a homopolymer), resulting in low hydrolysis stability. .
- Patent Document 6 Japanese Patent No. 412979 discloses a method of reacting several bissalicyl carbonates in order to increase the molecular weight of an aromatic polycarbonate.
- Patent Document 7 Japanese Patent Publication No. 2008-514754 discloses a method of increasing the molecular weight by introducing a polycarbonate oligomer, bis-salicyl carbonate and the like into an extruder.
- Patent Document 8 Japanese Patent No. 4286914
- the amount of terminal hydroxyl group is increased by an active hydrogen compound (dihydroxy compound), and then the aromatic polycarbonate having an increased amount of terminal hydroxyl group by a salicylic acid ester derivative is coupled.
- a method is disclosed.
- the method disclosed in the above publication which requires increasing the terminal hydroxyl group of polycarbonate, requires a reaction step with an active hydrogen compound and a reaction step with a salicylic acid ester derivative.
- Many polycarbonates have low thermal stability and risk of deterioration of physical properties.
- the increase in the amount of hydroxyl groups by the active hydrogen compound partially induces a chain scission reaction and is accompanied by an increase in molecular weight distribution.
- Patent Document 9 Japanese Patent Publication No. 6-94501 discloses a method for producing a polymer polycarbonate by introducing 1,4-cyclohexanediol.
- 1,4-cyclohexanediol is introduced together with the aromatic dihydroxy compound from the beginning of the polycondensation reaction system, 1,4-cyclohexanediol is consumed in the polycarbonate formation reaction first. (Oligomerization), and then the aromatic dihydroxy compound reacts to increase the molecular weight. For this reason, there are disadvantages that the reaction time is relatively long and appearance physical properties such as hue are likely to be lowered.
- Patent Document 10 Japanese Patent Laid-Open No. 2009-102536 describes a method for producing a polycarbonate by copolymerizing a specific aliphatic diol and an ether diol.
- the polycarbonate disclosed here has an isosorbide skeleton as the main structure, the excellent impact resistance required for the aromatic polycarbonate does not appear.
- Patent Document 11 Japanese Patent No. 3271353
- Patent Document 12 Patent No. 3301453
- the conventional method for producing a high-molecular-weight aromatic polycarbonate has many problems, and an improved production method capable of maintaining the original good quality of the polycarbonate and achieving a sufficiently high molecular weight. The request still exists.
- the inventors of the present invention have previously proposed a new method in which a high chain polymerization rate is achieved to obtain a good-quality aromatic polycarbonate by connecting the end of the aromatic polycarbonate with an aliphatic diol compound to extend the chain.
- Patent document 13 international publication 2011/062220 pamphlet.
- the aromatic polycarbonate resin having a high degree of polymerization having a Mw of about 30,000 to 100,000 can be obtained in a short time by connecting the end of the aromatic polycarbonate with an aliphatic diol compound and extending the chain.
- This method produces a polycarbonate by a high-speed polymerization reaction, it can suppress a branching / crosslinking reaction caused by a long-time heat retention or the like, and can avoid resin deterioration such as hue.
- the method of increasing the molecular weight of polycarbonate using a linking agent composed of these aliphatic diol compounds is a simple and quick method for preparing a polycarbonate resin that maintains the original good quality of polycarbonate and has achieved a sufficiently high molecular weight. Development of a high molecular weight polycarbonate resin that can be produced but has better thermal stability is desired.
- the problem to be solved by the present invention is to provide an aromatic polycarbonate resin composition having a high molecular weight, few different structures, good quality, and excellent thermal stability, and an improved production method thereof. It is to be.
- the present inventors have a quality advantage such as a high molecular weight but a low degree of branching and few heterogeneous structures, and in particular, a specific heterostructure content.
- the present invention has been achieved by finding a resin composition containing an aromatic polycarbonate resin in which the thermal stability (heat resistance) at a high temperature is greatly improved and a method for producing the same.
- the present invention provides the following high molecular weight aromatic polycarbonate resin composition and an improved production method thereof.
- An aromatic polycarbonate resin comprising an aromatic polycarbonate resin having a structural unit represented by the following general formula (II) and at least one of the structural units represented by the following general formulas (1) and (2)
- a cyclic carbonate represented by the following general formula (h2) which is a composition, containing any of the structural units represented by the general formulas (1) and (2) in an amount of 2000 ppm or less in terms of biphenolic acid.
- R 1 and R 2 are each independently a halogen atom, an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a cycloalkyl group having 6 to 20 carbon atoms, or 6 carbon atoms.
- p and q each represents an integer of 0 to 4
- X represents a single bond or the following ( II ′) represents a group selected from the group
- R 3 and R 4 each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 10 carbon atoms, or R 3 and R 4 are To form an aliphatic ring);
- Ra and Rb are each independently a hydrogen atom, a halogen atom, an oxygen atom or a halogen atom, a straight or branched alkyl group having 1 to 30 carbon atoms, an oxygen atom or a halogen atom.
- R 5 to R 8 each independently represents a hydrogen atom, a halogen atom or a carbon number 1 to 5 linear or branched alkyl groups, and n represents an integer of 0 to 30).
- Ra and Rb are each independently a hydrogen atom, a halogen atom, an oxygen atom or a halogen atom, a straight or branched alkyl group having 1 to 30 carbon atoms, an oxygen atom or a halogen atom.
- a cycloalkyl group having 3 to 30 carbon atoms which may contain, an aryl group having 6 to 30 carbon atoms which may contain an oxygen atom or a halogen atom, or a carbon number which may contain an oxygen atom or a halogen atom 1 to 15 alkoxy groups are represented, or Ra and Rb may be bonded to each other to form a ring).
- N value structural viscosity index represented by the following formula (1) is 1.25 or less.
- N value (log (Q160 value) -log (Q10 value)) / (log160 ⁇ log10) (1)
- Ra and Rb are each independently a hydrogen atom, a halogen atom, an oxygen atom or a halogen atom, a straight or branched alkyl group having 1 to 30 carbon atoms, an oxygen atom or a halogen atom.
- R 5 to R 8 each independently represents a hydrogen atom, a halogen atom or a carbon number 1 to 5 linear or branched alkyl groups, and n represents an integer of 0 to 30).
- Ra and Rb are each independently a hydrogen atom, a halogen atom, an oxygen atom or a halogen atom, a straight or branched alkyl group having 1 to 30 carbon atoms, an oxygen atom or a halogen atom.
- a cycloalkyl group having 3 to 30 carbon atoms which may contain, an aryl group having 6 to 30 carbon atoms which may contain an oxygen atom or a halogen atom, or a carbon number which may contain an oxygen atom or a halogen atom 1 to 15 alkoxy groups are represented, or Ra and Rb may be bonded to each other to form a ring).
- the aliphatic diol compound is 2-butyl-2-ethylpropane-1,3-diol, 2,2-diisobutylpropane-1,3-diol, 2-ethyl-2-methylpropane-1,3- 11.
- the production method according to 11 which is selected from the group consisting of diol, 2,2-diethylpropane-1,3-diol, and 2-methyl-2-propylpropane-1,3-diol.
- the aromatic polycarbonate resin composition of the present invention has greatly improved thermal stability (heat resistance) at high temperatures.
- a resin composition increases the molecular weight of the aromatic polycarbonate by a reaction between the aromatic polycarbonate (prepolymer) and a linking agent composed of an aliphatic diol compound having a specific structure, and at least one cyclic carbonate produced as a by-product. It can be obtained by a method of removing the part out of the reaction system.
- the high molecular weight aromatic polycarbonate resin in the resin composition obtained by such a method has almost no connection site in the chain, and is structurally almost the same as the polycarbonate obtained by the conventional interface method or melting method. It becomes.
- such an aromatic polycarbonate resin has the same physical properties as a polycarbonate by a conventional interfacial method, and is excellent in thermal stability (heat resistance) because it does not contain a skeleton derived from a connecting agent composed of an aliphatic diol compound. . Furthermore, since it is a polymer having a high molecular weight at high speed using an aliphatic diol compound as a linking agent, it has quality advantages such as a high molecular weight but a low degree of branching and few heterogeneous structures. In particular, the content of a specific different structure is not more than a predetermined value, and the thermal stability (heat resistance) at a high temperature is greatly improved.
- the aromatic polycarbonate resin composition of the present invention is a part of a cyclic carbonate produced as a by-product in a high molecular weight aromatic polycarbonate resin in which the content of a specific different structure is a predetermined value or less, and the reaction system Is contained.
- the presence of such a cyclic carbonate may improve the fluidity of the polycarbonate resin composition.
- Aromatic polycarbonate resin composition (1) Aromatic polycarbonate resin The aromatic polycarbonate resin composition of the present invention includes an aromatic polycarbonate resin having a structural unit represented by the following general formula (II) as a main structural unit.
- R 1 and R 2 are each independently a halogen atom, an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a cycloalkyl group having 6 to 20 carbon atoms, Represents an aryl group having 6 to 20 carbon atoms, a cycloalkoxy group having 6 to 20 carbon atoms, or an aryloxy group having 6 to 20 carbon atoms.
- p and q each represents an integer of 0 to 4.
- X represents a single bond or a group selected from the group (II ′) below.
- R 3 and R 4 each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 10 carbon atoms, or R 3 and R 4 are , May be bonded to each other to form an aliphatic ring.
- Examples of the aromatic dihydroxy compound for deriving the structural unit represented by the general formula (II) include compounds represented by the following general formula (II ′′).
- R 1 to R 2 , p, q, and X are the same as those in the general formula (II).
- aromatic dihydroxy compounds include bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, 2,2-bis (4-hydroxyphenyl) propane, , 2-bis (4-hydroxyphenyl) butane, 2,2-bis (4-hydroxyphenyl) octane, bis (4-hydroxyphenyl) phenylmethane, 1,1-bis (4-hydroxyphenyl) -1-phenyl Ethane, bis (4-hydroxyphenyl) diphenylmethane, 2,2-bis (4-hydroxy-3-methylphenyl) propane, 1,1-bis (4-hydroxy-3-tert-butylphenyl) propane, 2,2 -Bis (3,5-dimethyl-4-hydroxyphenyl) propane, 2,2-bis (4-hydroxy-3- Enylphenyl) propane, 2,2-bis (3-cyclohexyl-4-hydroxyphenyl) propane, 2,2-bis (4-hydroxy-3-bromophenyl) propane, 2,2-bis (3,5-di
- 2,2-bis (4-hydroxyphenyl) propane is preferred because of its stability as a monomer and the availability of a low amount of impurities contained therein.
- a plurality of types of the above-mentioned various monomers are used. May be used in combination as necessary.
- the structural unit constituting the aromatic polycarbonate resin of the present invention includes structural units represented by the following general formulas (1) and (2) as different structures (hereinafter referred to as “structural unit (1)”, “structural unit (2 ) ”) Is included.
- X in the following general formulas (1) and (2) is the same as in the above general formula (II).
- the structural formula (2) means one or both of the structural formulas (i) and (ii).
- content of the structural unit (2) in this invention means the total amount of said two structural formula (i) and (ii).
- the content ratio of any one of the structural units (1) and (2) is 2000 ppm or less, preferably 1500 ppm in terms of biphenolic acid, based on the aromatic polycarbonate resin composition (mass).
- it is 1000 ppm or less, Especially preferably, it is 500 ppm or less, Most preferably, it is 300 ppm or less.
- the degree of branching tends to increase and the thermal stability tends to decrease.
- these structural units are naturally occurring branches, it is difficult to easily control the degree of branching depending on the amount of branching agent added, or the fluidity is lowered and the moldability is deteriorated. There is.
- either one of the structural units (1) and (2) may be 2000 ppm.
- at least the structural unit (1) is 2000 ppm or less, more preferably 1500 ppm or less. More preferably, it is 1000 ppm or less, particularly preferably 500 ppm or less, and most preferably 300 ppm or less.
- both of the structural units (1) and (2) are each 2000 ppm or less, more preferably 1500 ppm or less, further preferably 1000 ppm or less, particularly preferably 500 ppm or less, most preferably 300 ppm in terms of biphenolic acid. It is the following.
- the ratio of the structural units represented by the structural units (1) and (2) is a total, 5000 ppm or less, more preferably 3000 ppm or less, more preferably 2000 ppm or less, particularly preferably 1000 ppm or less, in terms of biphenolic acid. Most preferably, it is 600 ppm or less.
- the structural unit constituting the aromatic polycarbonate resin of the present invention further includes a structural unit represented by the following general formula (3) (hereinafter referred to as “structural unit ( 3) "), and the content is preferably 150 ppm or less, more preferably 100 ppm or less, still more preferably 70 ppm or less in terms of biphenolic acid.
- structural unit ( 3) a structural unit represented by the following general formula (3)
- the content is preferably 150 ppm or less, more preferably 100 ppm or less, still more preferably 70 ppm or less in terms of biphenolic acid.
- X in the following general formula (3) is the same as in the above general formula (II).
- the structural formula (3) means at least one of the structural formulas (iii), (iv), and (v).
- content of the structural unit (3) in this invention means the total amount of said three structural formula (iii), (iv), and (v).
- the structural units (1) to (3) are each a kind of heterogeneous structure that is easily generated during the production of the aromatic polycarbonate resin, and the aromatic polycarbonate resin of the present invention is characterized by a small proportion of the heterogeneous structure.
- This includes a step of increasing the molecular weight of the aromatic polycarbonate prepolymer using a linking agent comprising an aliphatic diol compound having a specific structure, which will be described later, and a step of removing at least a part of the by-produced cyclic carbonate from the reaction system. It is thought that it is because it is manufactured by the method including.
- the aromatic polycarbonate resin of the present invention is derived from an aliphatic diol compound which is a linking agent in the obtained aromatic polycarbonate resin, despite the fact that the aliphatic diol compound is used to increase the connecting high molecular weight as described later.
- the structural unit is not included in the skeleton, or even if included in a very small amount, while having extremely high thermal stability and excellent heat resistance, while having the same skeleton as the conventional homopolycarbonate resin, It is possible to provide excellent quality such as a low N value, a small proportion of units having different structures, and excellent color tone.
- the unit having a heterogeneous structure refers to a unit having a structure that may cause an undesirable effect, and includes a branch point unit that is contained in a large amount in a polycarbonate obtained by a conventional melting method.
- the invention is characterized in that the proportion of the structural units (1) to (3) is extremely small.
- the lower limit thereof is not particularly limited and may be a detection limit (the detection lower limit is usually about 1 ppm). 1) to (3) are each allowed to be contained in an amount of 1 ppm or more (lower detection limit) in terms of biphenolic acid, sometimes 5 ppm or more, or 10 ppm or more.
- the content ratio of the structural units (1) to (3) in the present invention is a biphenolic acid conversion value.
- the biphenolic acid equivalent value is obtained by subjecting the resulting aromatic polycarbonate resin composition to alkaline hydrolysis to the monomer level, and then the compound (1)-() having the following structure corresponding to the structural units (1)-(3) in the monomer. This is a value obtained by measuring the content ratio of 3) by LC-MS analysis.
- the skeleton of the aromatic polycarbonate resin of the present invention may contain a structural unit derived from an aliphatic diol compound used in the high molecular weight process.
- the ratio of the structural unit derived from the aliphatic diol compound to the total structural unit amount of the high molecular weight aromatic polycarbonate resin is 1 mol% or less, more preferably 0.1 mol% or less.
- the weight average molecular weight (Mw) of the aromatic polycarbonate resin of the present invention is preferably 30,000 to 100,000, more preferably 30,000 to 80,000, particularly preferably 35,000 to 75,000, most preferably Is 40,000 to 65,000 and has high fluidity while having a high molecular weight.
- Mw weight average molecular weight
- the moldability and productivity when used in applications such as blow molding, extrusion molding, and injection molding are good.
- the obtained molded article has good physical properties such as mechanical properties, heat resistance, and organic solvent resistance.
- the N value (structural viscosity index) represented by the following formula (1) is preferably 1.3 or less, more preferably 1.28 or less, particularly preferably 1.25 or less. Most preferably, it is 1.23 or less.
- N value (log (Q160 value) -log (Q10 value)) / (log160 ⁇ log10) (1)
- the structural viscosity index “N value” is an index of the degree of branching of the aromatic polycarbonate resin.
- the N value in the high molecular weight aromatic polycarbonate resin of the present invention is low, the content ratio of the branched structure is small, and the ratio of the linear structure is high.
- Polycarbonate resins generally tend to have higher fluidity (higher Q value) when the proportion of the branched structure is increased in the same Mw, but the aromatic polycarbonate resin of the present invention kept the N value low. High fluidity (high Q value) is achieved.
- the aromatic polycarbonate resin composition of the present invention contains 3000 ppm or less of cyclic carbonate represented by the following general formula (h2).
- a cyclic carbonate corresponding to the aliphatic diol compound used as a linking agent in the production process is by-produced, but after removing this from the reaction system, a small amount of the cyclic polycarbonate remains. And the cyclic polycarbonate is contained in the aromatic polycarbonate resin composition finally obtained.
- Ra and Rb each independently represent a hydrogen atom, a halogen atom, an oxygen atom or a linear or branched alkyl group having 1 to 30 carbon atoms which may contain a halogen atom, an oxygen atom
- a cycloalkyl group having 3 to 30 carbon atoms which may contain a halogen atom, an aryl group having 6 to 30 carbon atoms which may contain an oxygen atom or a halogen atom, or an oxygen atom or halogen atom may be contained. It represents a good alkoxy group having 1 to 15 carbon atoms, or Ra and Rb may be bonded to each other to form a ring.
- R 5 to R 8 each independently represents a hydrogen atom, a halogen atom, or a linear or branched alkyl group having 1 to 5 carbon atoms.
- a fluorine atom is preferable.
- n represents an integer of 0 to 30, preferably 1 to 6, more preferably 1 to 3, particularly preferably 1.
- Ra and Rb are preferably each independently a hydrogen atom, a halogen atom, a linear or branched alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, It represents an aryl group having 6 to 10 carbon atoms or an alkoxy group having 1 to 8 carbon atoms, or Ra and Rb may be bonded to each other to form an alicyclic ring having 3 to 8 carbon atoms.
- the halogen atom a fluorine atom is preferable.
- R 5 to R 8 are preferably each independently a hydrogen atom, a fluorine atom or a methyl group.
- n preferably represents an integer of 1 to 6.
- Ra and Rb are more preferably each independently a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms, more preferably a straight chain having 1 to 4 carbon atoms.
- a chain or branched alkyl group Particularly preferred specific examples include methyl group, ethyl group, propyl group, n-butyl group, and i-butyl group.
- R 5 to R 8 are more preferably each a hydrogen atom.
- n is more preferably an integer of 1 to 3.
- the cyclic carbonate represented by the general formula (h2) is more preferably a compound represented by the following general formula (h3).
- n, Ra, and Rb are the same as those in general formula (h2) described above.
- cyclic carbonate examples include compounds having the following structures.
- the content of the cyclic carbonate represented by the general formula (h2) in the aromatic polycarbonate resin composition of the present invention is 3000 ppm or less, preferably 1000 ppm or less, more preferably 500 ppm or less, and particularly preferably 300 ppm or less.
- the lower limit of the content of the cyclic polycarbonate is usually a detection limit value, but is preferably 0.0005 ppm or more. The presence of such a cyclic carbonate may improve the fluidity of the polycarbonate resin composition.
- the catalyst deactivator used in the production process may be contained in the aromatic polycarbonate resin composition of the present invention. Due to the presence of the catalyst deactivator, the thermal stability of the resin composition is further improved.
- the content of the catalyst deactivator in the aromatic polycarbonate resin composition of the present invention is not particularly limited, but is preferably 3 ppm or more, more preferably 5 ppm or more. When the content of the catalyst deactivator is 3 ppm or more, the effect of improving the thermal stability becomes remarkable.
- the upper limit of the catalyst deactivator content is not particularly limited, but is preferably 30 ppm or less, more preferably 20 ppm or less.
- the catalyst deactivator for improving the thermal stability include aromatic sulfonic acids such as p-toluenesulfonic acid, aromatic sulfonic acid esters such as butyl paratoluenesulfonate, and tetrabutylphosphonium dodecylbenzenesulfonate.
- Aromatic sulfonates such as para-toluenesulfonic acid tetrabutylammonium salt, stearic acid chloride, butyric acid chloride, benzoyl chloride, toluenesulfonic acid chloride, benzyl chloride and other organic halides, dimethyl sulfate and other alkyl sulfates, phosphoric acids And phosphorous acid.
- a catalyst deactivator selected from the group consisting of paratoluenesulfonic acid, paratoluenesulfonic acid butyl, dodecylbenzenesulfonic acid tetrabutylphosphonium salt, and paratoluenesulfonic acid tetrabutylammonium salt is preferably used.
- the aromatic polycarbonate resin composition of the present invention further includes a heat stabilizer, a hydrolysis stabilizer, an antioxidant, a pigment, a dye, a reinforcing agent and a filler, an ultraviolet absorber, a lubricant, a mold release agent, and a crystal nucleating agent.
- a heat stabilizer a known one such as triphenylphosphine (P-Ph 3 ) can be used.
- Antioxidants include tris- (2,4-di-t-butylphenyl) phosphite, n-octadecyl- ⁇ - (4′-hydroxy-3 ′, 5′-di-t-butylphenyl) propionate, Pentaerythrityl-tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], n-octadecyl- ⁇ - (4′-hydroxy-3 ′, 5′-di-tert-butyl Phenyl) propionate, 1,6-hexanediol bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], triethylene glycol bis-3- (3-tert-butyl-4- Hydroxy-5-methylphenylpropionate), 3,9-bis [2- ⁇ 3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propiony
- Aromatic polycarbonate resin composition The aromatic polycarbonate resin composition of this invention has a favorable hue.
- the hue evaluation of an aromatic polycarbonate resin is generally represented by a YI value.
- the YI value of the branched aromatic polycarbonate resin obtained from the interfacial polymerization method is 0.8 to 1.0.
- the high molecular weight polymer of the aromatic polycarbonate obtained by the melt polymerization method has a YI value of 1.7 to 2.0 due to the deterioration of the quality accompanying the production process.
- the YI value of the high molecular weight aromatic polycarbonate resin obtained by the production method of the present invention shows the same YI value as that of the aromatic polycarbonate obtained by the interfacial polymerization method, and the hue is not deteriorated.
- the aromatic polycarbonate resin composition of the present invention has high heat resistance, more specifically, high molecular weight retention (an index indicating how much molecular weight reduction can be suppressed when heat retention is imposed at high temperatures). .
- the molecular weight (Mw) retention after the thermal residence test (60 minutes at 360 ° C.) of the aromatic polycarbonate resin composition of the present invention is preferably 50% or more, more preferably 70% or more.
- the aromatic polycarbonate resin composition of the present invention is preferably used for various molded articles, sheets, films and the like obtained by injection molding, blow molding (hollow molding), extrusion molding, injection blow molding, rotational molding, compression molding and the like. Can be used. When used in these applications, the resin composition of the present invention alone or a blend with another polymer may be used. Depending on the application, processing such as hard coating and laminating can be preferably used.
- the aromatic polycarbonate resin composition of the present invention is used for extrusion molding, blow molding, injection molding and the like.
- the molded product obtained include extrusion molded products, hollow molded products, precision parts, and thin injection molded products.
- Precision parts and thin injection-molded articles preferably have a thickness of 1 ⁇ m to 3 mm.
- molded products include optical media products such as compact discs, digital video discs, mini-discs, magneto-optical discs, optical communication media such as optical fibers, optical components such as headlamp lenses for cars and lens bodies for cameras, etc. , Optical equipment parts such as siren light covers and lighting lamp covers, vehicle window glass substitutes such as trains and automobiles, household window glass substitutes, daylighting parts such as sunroofs and greenhouse roofs, goggles and sunglasses, eyeglass lenses , Housings for OA equipment such as copiers, facsimiles and personal computers, housings for home appliances such as TVs and microwave ovens, electronic parts such as connectors and IC trays, helmets, protectors, protective equipment such as protective surfaces, feeding Household items such as bottles, tableware, trays, medical supplies such as artificial dialysis cases and dentures, packaging Material, writing instruments, but can be and the like miscellaneous goods such as stationery but are not limited to these.
- optical media products such as compact discs, digital video discs, mini-discs, magnet
- the use of the aromatic polycarbonate resin composition of the present invention includes the following molded products requiring high strength and precision moldability: ⁇ Automotive parts such as headlamp lenses, meter panels, sunroofs, glass window substitutes and skin parts; ⁇ Various films such as liquid crystal displays, light guide plates, optical disk substrates; ⁇ Construction materials such as transparent sheets; -Cases such as personal computers, printers, and liquid crystal televisions as structural members.
- the aromatic polycarbonate resin composition of the present invention has a high molecular weight by reacting an aromatic polycarbonate prepolymer with an aliphatic diol compound having a specific structure in the presence of a transesterification catalyst. And a cyclic carbonate removing step of removing at least a part of the cyclic carbonate by-produced in the high molecular weight forming step from the reaction system.
- Aliphatic diol compound used in the method for producing the aromatic polycarbonate resin composition of the present invention is represented by the following general formula (g2).
- Ra and Rb each independently represent a hydrogen atom, a halogen atom, an oxygen atom or a linear or branched alkyl group having 1 to 30 carbon atoms which may contain a halogen atom, an oxygen atom or A cycloalkyl group having 3 to 30 carbon atoms which may contain a halogen atom, an aryl group having 6 to 30 carbon atoms which may contain an oxygen atom or a halogen atom, or an oxygen atom or a halogen atom. It represents an alkoxy group having 1 to 15 carbon atoms, or Ra and Rb may be bonded to each other to form a ring.
- the halogen atom a fluorine atom is preferable.
- R 5 to R 8 each independently represents a hydrogen atom, a halogen atom, or a linear or branched alkyl group having 1 to 5 carbon atoms.
- halogen atom a fluorine atom is preferable.
- n represents an integer of 0 to 30, preferably 1 to 6, more preferably 1 to 3, particularly preferably 1.
- Ra and Rb are preferably each independently a hydrogen atom, a halogen atom, a linear or branched alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, It represents an aryl group having 6 to 10 carbon atoms or an alkoxy group having 1 to 8 carbon atoms, or Ra and Rb may be bonded to each other to form an alicyclic ring having 3 to 8 carbon atoms.
- the halogen atom a fluorine atom is preferable.
- R 5 to R 8 are preferably each independently a hydrogen atom, a fluorine atom or a methyl group.
- n preferably represents an integer of 1 to 6.
- Ra and Rb are more preferably each independently a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms, more preferably a straight chain having 1 to 4 carbon atoms.
- a chain or branched alkyl group Particularly preferred specific examples include methyl group, ethyl group, propyl group, n-butyl group, and i-butyl group.
- R 5 to R 8 are more preferably each a hydrogen atom.
- n is more preferably an integer of 1 to 3.
- aliphatic diol compound represented by the general formula (g2) is a compound represented by the following general formula (g3).
- Ra and Rb are the same as in general formula (g2).
- Ra and Rb are more preferably each independently a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms, more preferably a linear chain having 1 to 4 carbon atoms. Or it is a branched alkyl group, More preferably, it is a C2-C4 linear or branched alkyl group. Particularly preferred specific examples include a methyl group, an ethyl group, a propyl group, an n-butyl group, and an i-butyl group, preferably an ethyl group, a propyl group, an n-butyl group, and an i-butyl group. It is done.
- Examples of the aliphatic diol compound include 2-butyl-2-ethylpropane-1,3-diol, 2,2-diisobutylpropane-1,3-diol, 2-ethyl-2-methylpropane-1,3-diol, 2,2-diethylpropane-1,3-diol, 2-methyl-2-propylpropane-1,3-diol, propane-1,2-diol, propane-1,3-diol, ethane-1,2- Examples include diol (1,2-ethylene glycol), 2,2-diisoamylpropane-1,3-diol, and 2-methylpropane-1,3-diol.
- aliphatic diol compound examples include compounds having the following structural formula.
- 2-butyl-2-ethylpropane-1,3-diol 2,2-diisobutylpropane-1,3-diol, 2-ethyl-2-methylpropane-1,3-diol.
- Aromatic polycarbonate prepolymer The aromatic polycarbonate prepolymer used in the production method of the present invention has a main repeating unit having the structure represented by the general formula (II) constituting the aromatic polycarbonate resin of the present invention. It is a polycondensation polymer.
- the production method of the present invention comprises the step of linking the aromatic polycarbonate prepolymer with a linking agent comprising an aliphatic diol compound having the structure represented by the general formula (g2) by transesterification under reduced pressure.
- a linking agent comprising an aliphatic diol compound having the structure represented by the general formula (g2) by transesterification under reduced pressure.
- This has the advantage of a polycarbonate having a high molecular weight that gives high fluidity while maintaining the original properties of polycarbonate resin such as impact resistance, and also has the above general formulas (1) to ( An aromatic polycarbonate resin having a small proportion of units having a different structure represented by 3) and having significantly improved heat resistance can be obtained.
- Such an aromatic polycarbonate prepolymer is prepared by a known transesterification method in which an aromatic dihydroxy compound that induces a structural unit represented by the general formula (II) is reacted with a carbonic acid diester in the presence of a basic catalyst, or the aromatic dihydroxy compound. It can be easily obtained by any known interfacial polycondensation method in which a compound is reacted with phosgene or the like in the presence of an acid binder.
- Examples of the aromatic dihydroxy compound for deriving the structural unit represented by the general formula (II) include a compound represented by the general formula (II ′′).
- the aromatic polycarbonate prepolymer used in the present invention may be synthesized by an interfacial polymerization method or may be synthesized by a melt polymerization method, and may be a solid phase polymerization method or a thin film polymerization method. It may be synthesized. Further, it is also possible to use polycarbonate recovered from used products such as used disk molded products. These polycarbonates can be mixed and used as a polymer before reaction.
- a polycarbonate polymerized by an interfacial polymerization method and a polycarbonate polymerized by a melt polymerization method may be mixed, and a polycarbonate polymerized by a melt polymerization method or an interfacial polymerization method and a polycarbonate recovered from a used disk molded product, etc. May be used in combination.
- the aromatic polycarbonate prepolymer used in the present invention is preferably an end-capped aromatic polycarbonate prepolymer satisfying specific conditions. That is, it is preferable that at least a part of the aromatic polycarbonate prepolymer is sealed with an aromatic monohydroxy compound-derived terminal group or terminal phenyl group (hereinafter also referred to as “sealing terminal group”).
- the ratio of the capped end groups As the ratio of the capped end groups, the effect is particularly remarkable when the ratio is 60 mol% or more with respect to the total amount of terminals.
- the terminal phenyl group concentration (ratio of capped end groups with respect to all structural units) is 2 mol% or more, preferably 2 to 20 mol%, particularly preferably 2 to 12 mol%.
- the reaction with the aliphatic diol compound proceeds rapidly, and the effects unique to the present invention are particularly prominent.
- the ratio of the amount of capped ends to the total amount of ends of the polymer can be analyzed by 1 H-NMR analysis of the polymer.
- the terminal hydroxyl group concentration can be measured by spectroscopic measurement using a Ti complex.
- the terminal hydroxyl group concentration by the same evaluation is preferably 1,500 ppm or less, more preferably 1,000 ppm or less. If the hydroxyl terminal exceeds this range or the amount of the sealing terminal is less than this range, there is a possibility that a sufficient high molecular weight effect cannot be obtained by the transesterification reaction with the aliphatic diol compound.
- total amount of terminal groups of polycarbonate or “total amount of terminal groups of aromatic polycarbonate prepolymer” means, for example, that there is 0.5 mol of unbranched polycarbonate (that is, chain polymer), the total amount of terminal groups. Is calculated as 1 mole.
- sealing end group examples include phenyl end, cresyl end, o-tolyl end, p-tolyl end, pt-butylphenyl end, biphenyl end, o-methoxycarbonylphenyl end, p-cumylphenyl end, etc. There may be mentioned end groups.
- terminal groups composed of low-boiling aromatic monohydroxy compounds that are easily removed from the reaction system by transesterification with an aliphatic diol compound are preferred, such as a phenyl terminal and a p-tert-butylphenyl terminal. Particularly preferred.
- Such a sealed end group can be introduced by using a terminal terminator during the production of the aromatic polycarbonate prepolymer in the interface method.
- the terminal terminator include p-tert-butylphenol, phenol, p-cumylphenol, and long-chain alkyl-substituted phenol.
- the amount of the terminal stopper used can be appropriately determined according to the desired terminal amount of the aromatic polycarbonate prepolymer (that is, the molecular weight of the desired aromatic polycarbonate prepolymer), the reaction apparatus, the reaction conditions, and the like.
- the end group can be introduced by using a carbonic diester such as diphenyl carbonate in excess of the aromatic dihydroxy compound.
- a carbonic diester such as diphenyl carbonate
- 1.00 to 1.30 mol, more preferably 1.02 to 1.20 mol, of carbonic acid diester is used per 1 mol of the aromatic dihydroxy compound.
- an end-capped polycondensation polymer obtained by reacting an aromatic dihydroxy compound and a carbonic acid diester (transesterification reaction) is preferably used as the aromatic polycarbonate prepolymer.
- a polyfunctional compound having three or more functional groups in one molecule can be used in combination with the aromatic dihydroxy compound.
- a polyfunctional compound a compound having a phenolic hydroxyl group or a carboxyl group is preferably used.
- a dicarboxylic acid compound may be used in combination with the aromatic dihydroxy compound to form a polyester carbonate.
- the dicarboxylic acid compound terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid and the like are preferable, and these dicarboxylic acids are preferably used as an acid chloride or ester compound.
- the dicarboxylic acid is preferably used in the range of 0.5 to 45 mol% when the total of the dihydroxy component and the dicarboxylic acid component is 100 mol%. More preferably, it is used in the range of ⁇ 40 mol%.
- the molecular weight of the aromatic polycarbonate prepolymer is preferably 5,000 to 60,000.
- An aromatic polycarbonate prepolymer having a Mw of 10,000 to 50,000, more preferably 10,000 to 40,000, and particularly preferably 20,000 to 35,000 is desirable.
- the aromatic polycarbonate prepolymer itself has a high viscosity, and therefore it is necessary to carry out the production of the prepolymer at a high temperature, a high shear, and a long time. And / or it may be necessary to carry out the reaction with the aliphatic diol compound at a high temperature, a high shear, and a long time.
- an aromatic polycarbonate prepolymer is made to have a high molecular weight by allowing an aliphatic diol compound to act on the end-capped aromatic polycarbonate prepolymer in the presence of a transesterification catalyst under reduced pressure conditions. To do. This reaction proceeds at high speed under mild conditions, and high molecular weight is achieved. That is, the reaction between the aliphatic diol compound and the aromatic polycarbonate prepolymer proceeds faster than the reaction in which the aliphatic polycarbonate unit is generated by the transesterification after the aromatic polycarbonate prepolymer is cleaved by the aliphatic diol. .
- the reaction between the aromatic polycarbonate prepolymer and the aliphatic diol compound proceeds, and a structure corresponding to the structure of the aliphatic diol compound is formed.
- the cyclic carbonate which is the cyclic body to have is by-produced.
- the molecular weight of the aromatic polycarbonate prepolymer is increased, and finally the structure is almost the same as a conventional homopolycarbonate (for example, a homopolycarbonate resin derived from bisphenol A).
- the high molecular weight process and the cyclic carbonate removing process are not necessarily physically and temporally separate processes, and are actually performed simultaneously.
- an aromatic polycarbonate and an aliphatic diol compound are reacted in the presence of a transesterification catalyst to increase the molecular weight, and at least a part of the cyclic carbonate by-produced in the high-molecular weight reaction. Is removed from the reaction system.
- the by-product cyclic carbonate is a compound having a structure represented by the following general formula (h2).
- Ra and Rb each independently represent a hydrogen atom, a halogen atom, an oxygen atom or a linear or branched alkyl group having 1 to 30 carbon atoms which may contain a halogen atom, an oxygen atom
- a cycloalkyl group having 3 to 30 carbon atoms which may contain a halogen atom, an aryl group having 6 to 30 carbon atoms which may contain an oxygen atom or a halogen atom, or an oxygen atom or halogen atom may be contained. It represents a good alkoxy group having 1 to 15 carbon atoms, or Ra and Rb may be bonded to each other to form a ring.
- R 5 to R 8 each independently represents a hydrogen atom, a halogen atom, or a linear or branched alkyl group having 1 to 5 carbon atoms.
- a fluorine atom is preferable.
- n represents an integer of 0 to 30, preferably 1 to 6, more preferably 1 to 3, particularly preferably 1.
- Ra and Rb are preferably each independently a hydrogen atom, a halogen atom, a linear or branched alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, It represents an aryl group having 6 to 10 carbon atoms or an alkoxy group having 1 to 8 carbon atoms, or Ra and Rb may be bonded to each other to form an alicyclic ring having 3 to 8 carbon atoms.
- the halogen atom a fluorine atom is preferable.
- R 5 to R 8 are preferably each independently a hydrogen atom, a fluorine atom or a methyl group.
- n preferably represents an integer of 1 to 6.
- Ra and Rb are more preferably each independently a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms, more preferably a straight chain having 1 to 4 carbon atoms.
- a chain or branched alkyl group Particularly preferred specific examples include methyl group, ethyl group, propyl group, n-butyl group, and i-butyl group.
- R 1 to R 4 are more preferably each a hydrogen atom.
- n is more preferably an integer of 1 to 3.
- the cyclic carbonate represented by the general formula (h2) is more preferably a compound represented by the following general formula (h3).
- n, Ra, and Rb are the same as those in general formula (h2) described above.
- cyclic carbonate examples include compounds having the following structures.
- the production method using the aliphatic diol compound having the structure represented by the general formula (g2) according to the present invention is advantageous in that the molecular weight can be increased at a higher speed than the conventional production method of polycarbonate by a melting method.
- a cyclic carbonate having a specific structure is by-produced with the progress of the high molecular weight reaction. Then, after removing the by-product cyclic carbonate to the outside of the reaction system, a high molecular weight polycarbonate resin having substantially the same skeleton as the homopolycarbonate resin is obtained.
- the cyclic carbonate produced as a by-product has a structure corresponding to the aliphatic diol compound to be used, and is considered to be a cyclic product derived from the aliphatic diol compound. The reaction mechanism is not always clear.
- the production method using the aliphatic diol compound having the structure represented by the general formulas (g2) to (g3) of the present invention comprises reacting an aromatic diol compound as a linking agent with an aromatic polycarbonate prepolymer,
- the cyclic carbonate having a structure corresponding to the structure of the aliphatic diol compound formed as a by-product is removed, and within this range, the reaction is limited to a specific reaction mechanism. Not a thing.
- the high molecular weight aromatic polycarbonate resin obtained by the production method using the aliphatic diol compound having the structure represented by the general formula (g2) of the present invention contains almost all structural units derived from the aliphatic diol compound.
- the resin skeleton is almost the same as that of the homopolycarbonate resin.
- the structural unit derived from the aliphatic diol compound as the linking agent is not contained in the skeleton or is contained in a very small amount, it has extremely high thermal stability and excellent heat resistance.
- the structural unit derived from the aliphatic diol compound as the linking agent is not contained in the skeleton or is contained in a very small amount, it has extremely high thermal stability and excellent heat resistance.
- the same skeleton as a conventional homopolycarbonate resin it can be provided with excellent quality such as a low N value, a small proportion of units having different structures, and excellent color tone.
- the unit having a heterogeneous structure refers to a unit having a structure that may cause an undesirable effect, and includes a branch point unit that is contained in a large amount in a polycarbonate obtained by a conventional melting method.
- the proportion of different structural units represented by any one of the general formulas (1) to (2) can be reduced to 2000 ppm or less in terms of biphenolic acid.
- the skeleton of the aromatic polycarbonate resin composition obtained by the production method of the present invention may contain a structural unit derived from an aliphatic diol compound.
- the ratio of the structural unit derived from the aliphatic diol compound to the total structural unit amount of the high molecular weight aromatic polycarbonate resin is 1 mol% or less, more preferably 0.1 mol% or less.
- the amount of the aliphatic diol compound used is preferably 0.01 to 1.0 mol, more preferably 0.1 to 1.0 mol, relative to 1 mol of the total terminal groups of the aromatic polycarbonate prepolymer. More preferably, it is 0.2 to 0.7 mol.
- an excessive amount may be added in advance in consideration of the possibility that a part of the reaction may go out of the system without being involved in the reaction due to volatilization or the like depending on the reaction conditions. For example, a maximum of 50 moles, preferably 10 moles, more preferably 5 moles can be added to 1 mole of all terminal groups of the aromatic polycarbonate prepolymer.
- the method of adding and mixing the aliphatic diol compound is not particularly limited, but when an aliphatic diol compound having a relatively high boiling point (boiling point of about 240 ° C. or higher) is used, the aliphatic diol compound has a reduced pressure of 10 torr. It is preferable to supply directly to the high molecular weight reactor under a high vacuum of 1333 Pa or less. More preferably, the degree of vacuum is 2.0 torr or less (267 Pa or less), more preferably 0.01 to 1 torr (1.3 to 133 Pa or less).
- the aromatic polycarbonate prepolymer and the aliphatic diol compound may be mixed at a relatively moderate pressure. It can.
- the prepolymer mixture is subjected to a high molecular weight reaction under reduced pressure conditions, thereby comparing the boiling points. Even a low aliphatic diol compound minimizes volatilization and eliminates the need for excessive use.
- the temperature used in the transesterification reaction (polymerization reaction) between the aromatic polycarbonate prepolymer and the aliphatic diol compound is preferably in the range of 240 ° C to 320 ° C, more preferably 260 ° C to 310 ° C, more preferably 270 ° C to 300 ° C.
- the degree of reduced pressure is preferably 13 kPaA (100 torr) or less, more preferably 1.3 kPaA (10 torr) or less, more preferably 0.67 to 0.013 kPaA (5 to 0.1 torr).
- Examples of the basic compound catalyst used in the transesterification reaction include alkali metal compounds and / or alkaline earth metal compounds, nitrogen-containing compounds, and the like.
- organic acid salts such as alkali metal and alkaline earth metal compounds, inorganic salts, oxides, hydroxides, hydrides or alkoxides, quaternary ammonium hydroxides and salts thereof, amines, and the like. These compounds are preferably used, and these compounds can be used alone or in combination.
- alkali metal compound examples include sodium hydroxide, potassium hydroxide, cesium hydroxide, lithium hydroxide, sodium bicarbonate, sodium carbonate, potassium carbonate, cesium carbonate, lithium carbonate, sodium acetate, potassium acetate, acetic acid.
- Cesium lithium acetate, sodium stearate, potassium stearate, cesium stearate, lithium stearate, sodium borohydride, sodium tetraphenylborate, sodium benzoate, potassium benzoate, cesium benzoate, lithium benzoate, phosphoric acid Disodium hydrogen, dipotassium hydrogen phosphate, dilithium hydrogen phosphate, disodium phenyl phosphate, sodium gluconate, disodium salt of bisphenol A, 2 potassium salt, 2 cesium salt, 2 lithium salt, phenol Sodium salt, potassium salt, cesium salt, lithium salt or the like is used.
- alkaline earth metal compound examples include magnesium hydroxide, calcium hydroxide, strontium hydroxide, barium hydroxide, magnesium hydrogen carbonate, calcium hydrogen carbonate, strontium hydrogen carbonate, barium hydrogen carbonate, magnesium carbonate, calcium carbonate.
- Strontium carbonate, barium carbonate, magnesium acetate, calcium acetate, strontium acetate, barium acetate, magnesium stearate, calcium stearate, calcium benzoate, magnesium phenyl phosphate, and the like are used.
- nitrogen-containing compounds include tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetrabutylammonium hydroxide, trimethylbenzylammonium hydroxide, and other alkyl groups and / or aryl groups.
- Quaternary ammonium hydroxides such as triethylamine, dimethylbenzylamine and triphenylamine, secondary amines such as diethylamine and dibutylamine, primary amines such as propylamine and butylamine, 2-methylimidazole Imidazoles such as 2-phenylimidazole and benzimidazole, or ammonia, tetramethylammonium borohydride, tetrabutylammonium borohydride, Tiger boronic acid tetrabutylammonium, basic or basic salts such as tetraphenyl borate tetraphenyl ammonium or the like is used.
- zinc, tin, zirconium and lead salts are preferably used, and these can be used alone or in combination.
- transesterification catalyst examples include zinc acetate, zinc benzoate, zinc 2-ethylhexanoate, tin (II) chloride, tin (IV) chloride, tin (II) acetate, tin (IV) acetate, and dibutyltin.
- Dilaurate, dibutyltin oxide, dibutyltin dimethoxide, zirconium acetylacetonate, zirconium oxyacetate, zirconium tetrabutoxide, lead (II) acetate, lead (IV) acetate and the like are used.
- These catalysts are used in a ratio of 1 ⁇ 10 ⁇ 9 to 1 ⁇ 10 ⁇ 3 mol, preferably in a ratio of 1 ⁇ 10 ⁇ 7 to 1 ⁇ 10 ⁇ 5 mol, with respect to a total of 1 mol of the aromatic dihydroxy compound. Used.
- (Iii) Cyclic carbonate removal step In the method of the present invention, the aromatic polycarbonate prepolymer is made high molecular weight by the high molecular weight reaction, and at the same time, at least a part of the cyclic carbonate by-produced in the reaction is moved out of the reaction system. Remove. By removing the by-produced cyclic carbonate out of the reaction system, the reaction of increasing the molecular weight of the aromatic polycarbonate prepolymer proceeds.
- Examples of the method for removing the cyclic carbonate include a method of distilling off from the reaction system together with phenol and unreacted aliphatic diol compound which are also by-produced.
- the temperature when distilling from the reaction system is 260-320 ° C.
- the removal of the cyclic carbonate is performed on at least a part of the cyclic carbonate by-produced. Although it is most preferred to remove all of the by-product cyclic carbonate, it is generally difficult to remove it completely. It is allowed that the cyclic carbonate remains in the product polycarbonate resin when it cannot be completely removed. A preferable upper limit of the residual amount in the product is 3000 ppm.
- the cyclic carbonate having the structure represented by the general formula (h2) is 3000 ppm or less, preferably An aromatic polycarbonate resin composition containing 1000 ppm or less, more preferably 500 ppm or less, particularly preferably 300 ppm or less is obtained.
- the lower limit of the content ratio of the cyclic carbonate having the structure represented by the general formula (h2) is usually a detection limit value, and is preferably 0.0005 ppm or more.
- the content rate of cyclic carbonate is the value measured by GC-MS.
- the cyclic carbonate distilled out of the reaction system can then be recovered and reused (recycled) through processes such as hydrolysis and purification.
- the phenol distilled off together with the cyclic carbonate can also be recovered and supplied to the diphenyl carbonate production process for reuse.
- the aromatic polycarbonate prepolymer has a weight average molecular weight (Mw) of the aromatic polycarbonate resin after the reaction by transesterification reaction between the aromatic polycarbonate prepolymer and the aliphatic diol compound.
- the weight average molecular weight (Mw) is preferably increased by 5,000 or more, more preferably 10,000 or more, and still more preferably 15,000 or more.
- Any known apparatus may be used in the transesterification reaction with the aliphatic diol compound, the material of the kettle, etc., and it may be a continuous type or a batch type.
- the reaction apparatus used for carrying out the above reaction is equipped with paddle blades, lattice blades, glasses blades, etc. even with vertical types equipped with vertical stirring blades, Max blend stirring blades, helical ribbon stirring blades, etc. It may be a horizontal type or an extruder type equipped with a screw, and it is preferable to use a reaction apparatus in which these are appropriately combined in consideration of the viscosity of the polymer. It is preferable to have a rotary blade with good horizontal agitation efficiency and a unit that can be decompressed. More preferably, a twin screw extruder or a horizontal reactor having a polymer seal and having a devolatilization structure is suitable.
- stainless steel such as SUS310, SUS316, and SUS304, or a material that does not affect the color tone of the polymer such as nickel or nitrided steel is preferable.
- the inner side of the device (the portion in contact with the polymer) may be subjected to buffing or electropolishing, or may be subjected to metal plating such as chromium.
- a catalyst deactivator can be used for the polymer having an increased molecular weight.
- a method of deactivating a catalyst by adding a known acidic substance is preferably performed.
- aromatic sulfonic acids such as p-toluenesulfonic acid, aromatic sulfonic acid esters such as butyl paratoluenesulfonic acid, tetrabutylphosphonium salt of dodecylbenzenesulfonic acid, tetratoluenesulfonic acid tetra Aromatic sulfonates such as butylammonium salts, stearic acid chloride, butyric acid chloride, benzoyl chloride, toluene sulfonic acid chloride, organic halides such as benzyl chloride, alkyl sulfates such as dimethyl sulfate, phosphoric acids, phosphorous acids, etc. Can be mentioned.
- a catalyst deactivator selected from the group consisting of paratoluenesulfonic acid, paratoluenesulfonic acid butyl, dodecylbenzenesulfonic acid tetrabutylphosphonium salt, and paratoluenesulfonic acid tetrabutylammonium salt is preferably used.
- the addition of the catalyst deactivator can be mixed with the polycarbonate resin by a conventionally known method after the completion of the high molecular weight reaction.
- a method of appropriately mixing and kneading with an extruder, a Banbury mixer, a roll or the like after being dispersed and mixed with a high speed mixer represented by a turnbull mixer, a Henschel mixer, a ribbon blender, or a super mixer is appropriately selected.
- a step of devolatilizing and removing low boiling point compounds in the polymer at a pressure of 0.013 to 0.13 kPaA (0.1 to 1 torr) and a temperature of 200 to 350 ° C. may be provided.
- a horizontal apparatus equipped with a stirring blade having excellent surface renewability, such as a paddle blade, a lattice blade, or a glasses blade, or a thin film evaporator is preferably used.
- a twin screw extruder or a horizontal reactor having a polymer seal and having a vent structure is suitable.
- heat stabilizers such as triphenylphosphine (P-Ph 3 ) can be used.
- Antioxidants include tris- (2,4-di-t-butylphenyl) phosphite, n-octadecyl- ⁇ - (4′-hydroxy-3 ′, 5′-di-t-butylphenyl) propionate, Pentaerythrityl-tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], n-octadecyl- ⁇ - (4′-hydroxy-3 ′, 5′-di-tert-butyl Phenyl) propionate, 1,6-hexanediol bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], triethylene glycol bis-3- (3-tert-butyl-4- Hydroxy-5-methylphenylpropionate), 3,9-bis [2- ⁇ 3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propiony
- additives can be mixed into the polycarbonate resin by a conventionally known method in the same manner as the catalyst deactivator.
- a method in which each component is dispersed and mixed with a high-speed mixer represented by a turnbull mixer, a Henschel mixer, a ribbon blender, or a super mixer, and then melt-kneaded with an extruder, a Banbury mixer, a roll, or the like is appropriately selected.
- the additive addition step may be simultaneous with or different from the catalyst deactivator.
- i is the i-th dividing point when the molecular weight M is divided
- W i is the i-th weight
- N i is the number of i-th molecules
- M i is the i-th molecular weight.
- the molecular weight M represents a polystyrene molecular weight value at the same elution time of the calibration curve.
- the obtained value is a biphenolic acid conversion value.
- 26.1 mg of biphenolic acid was diluted with 25 ml of acetonitrile to prepare a standard solution. This solution was diluted to make a standard solution of 1.0 to 250 mg / l.
- Terminal hydroxyl group concentration Measured by UV / visible spectroscopic analysis (546 nm) of a complex formed from a polymer and titanium tetrachloride in a methylene chloride solution. Or it measured by observing the terminal hydroxyl group from the analysis result of 1 H-NMR.
- the terminal hydroxyl group concentration (OH) in PP is determined from the integration ratio of the hydroxyl peak of 4.7 ppm and the phenyl and phenylene groups (terminal phenyl group and phenylene group derived from the BPA skeleton) in the vicinity of 7.0 to 7.5 ppm. Concentration) was calculated.
- Terminal phenyl group concentration (sealing terminal group concentration, Ph terminal concentration; mol%): Obtained from the analysis result of 1 H-NMR by the following formula.
- 0.05 g of a resin sample was dissolved in 1 ml of deuterium-substituted chloroform (containing 0.05 w / v% TMS), a 1 H-NMR spectrum was measured at 23 ° C., and a terminal of about 7.4 ppm was obtained.
- the amount of terminal phenyl groups and the concentration of terminal phenyl groups of PP were measured from the integration ratio of the phenyl group and the phenylene group in the vicinity of 7.0 to 7.3 ppm (derived from BPA skeleton).
- the total terminal group amount of the polymer can be calculated from the above terminal hydroxyl group concentration and terminal phenyl group concentration.
- Q value is the flow rate of molten resin (ml / sec), and it is 5 hours at 130 ° C. using Koka-type flow tester CFT-500D (manufactured by Shimadzu Corporation). After drying, the melt flow volume per unit time measured at 280 ° C. and a load of 160 kg was evaluated.
- N value unit time measured at 280 ° C. under a load of 160 kg for an aromatic polycarbonate (sample) dried at 130 ° C. for 5 hours using a Koka type flow tester CFT-500D (manufactured by Shimadzu Corporation) The melt flow volume per unit was defined as Q160 value, and the melt flow volume per unit time measured at 280 ° C. and a load of 10 kg was defined as Q10 value.
- N value (log (Q160 value) -log (Q10 value)) / (log160-log10) (1)
- Resin heat retention test 1 g of sample resin was put in a test tube and dried for 2 hours in a block heater set at 120 ° C. in a glove box (oxygen concentration 0.0%) substituted with nitrogen. Subsequently, it was heated and retained for 60 minutes with a block heater set at 360 ° C. in the glove box. The molecular weight (Mw) retention rate (%) and the amount of change in the YI value before and after the thermal residence test were measured.
- Mw molecular weight
- this test is a test which gives the thermal history in the maximum level of the general molding temperature of polycarbonate, such as precision molding which needs to keep the melt viscosity of resin low, for example.
- the long residence time of 60 minutes is set to the longest residence time that can be assumed at the actual molding site including troubles of the apparatus.
- Resin hue (YI value) before and after the thermal residence test 1 g of a resin sample was dissolved in 30 ml of methylene chloride, and a spectroscopic color difference meter (manufactured by Nippon Denshoku Industries Co., Ltd., trade name “SE” -2000 ”) to measure the YI value.
- GC-MS measurement conditions Measuring device: Agilent HP6890 / 5973MSD Column: Capillary column DB-5MS, 30m ⁇ 0.25mm ID, film thickness 0.5 ⁇ m Temperature rising conditions: 50 °C (5min hold) -300 °C (15min hold), 10 °C / min Inlet temperature: 300 ° C, implantation amount: 1.0 ⁇ l (split ratio 25) Ionization method: EI method Carrier gas: He, 1.0 ml / min Aux temperature: 300 ° C Mass scan range: 33-700 Solvent: Chloroform for HPLC Internal standard: 2,4,6-Trimethylolphenol
- the chemical purity of the aliphatic diol compounds used in the following examples and comparative examples is 98 to 99% in all, the chlorine content is 0.8 ppm or less, alkali metals, alkaline earth metals, titanium and heavy metals (iron, The contents of nickel, chromium, zinc, copper, manganese, cobalt, molybdenum, and tin) are each 1 ppm or less.
- Chemical purity of aromatic dihydroxy compound and carbonic acid diester is 99% or more, chlorine content is 0.8 ppm or less, alkali metal, alkaline earth metal, titanium and heavy metal (iron, nickel, chromium, zinc, copper, manganese, cobalt, The contents of molybdenum and tin are each 1 ppm or less.
- 2,2-bis (4-hydroxyphenyl) propane is “BPA”
- diphenyl carbonate is “DPC”
- the prepolymer is “PP”
- the hydroxyl group is “OH group”
- the phenyl group is “Ph”.
- Example 1 1,2-bis (4-hydroxyphenyl) propane 10001.0 g (43.808 mol), diphenyl carbonate 10557.0 g (49.281 mol) and sodium hydrogen carbonate as a catalyst at 1.0 ⁇ mol / mol-BPA (the catalyst is (Calculated as the number of moles relative to 2,2-bis (4-hydroxyphenyl) propane) was placed in a 50 L SUS reactor equipped with a stirrer and a distillation apparatus, and the system was replaced with a nitrogen atmosphere. The degree of vacuum was adjusted to 27 kPaA (200 torr), the heating medium was set to 205 ° C., the raw material was heated and melted, and then stirred.
- the temperature of the heating medium was gradually raised, and at the same time the pressure reduction degree was lowered, the phenol distilled from the reaction system was agglomerated and removed with a cooling tube, and a transesterification reaction was carried out. It took about 4 hours, and finally the inside of the system was 260 ° C., the degree of vacuum was 0.13 kPaA (1 torr) or less, and the system was further maintained for 1 hour.
- the partially sampled polycarbonate prepolymer had a weight average molecular weight (Mw) of 22,000, a terminal hydroxyl group concentration of 60 ppm, and a phenyl terminal concentration (Ph terminal concentration) of 5.0 mol%.
- the terminal hydroxyl group concentration is a value calculated from NMR, and indicates the terminal hydroxyl group concentration contained in the entire polymer.
- the Ph terminal concentration is a value calculated from NMR, and represents the terminal concentration of all phenylene groups and phenyl groups (including phenyl groups substituted by hydroxyl groups) in the phenyl terminals.
- Example 2 10,000.6 g (43.807 mol) of 2,2-bis (4-hydroxyphenyl) propane, 10,560.0 g (49.295 mol) of diphenyl carbonate and 0.5 ⁇ mol / mol-BPA of cesium carbonate as a catalyst (The catalyst is calculated as the number of moles relative to 2,2-bis (4-hydroxyphenyl) propane) in a 50 L SUS reactor equipped with a stirrer and a distiller, and the system is replaced with a nitrogen atmosphere. did. The degree of vacuum was adjusted to 27 kPaA (200 torr), the heating medium was set to 205 ° C., the raw material was heated and melted, and then stirred.
- the obtained polycarbonate prepolymer had a weight average molecular weight (Mw) of 22,000, a terminal hydroxyl group concentration of 60 ppm, and a phenyl terminal concentration (Ph terminal concentration) of 5.0 mol%.
- the terminal hydroxyl group concentration is a value calculated from NMR, and indicates the terminal hydroxyl group concentration contained in the entire polymer.
- the Ph terminal concentration is a value calculated from NMR, and represents the terminal concentration of all phenylene groups and phenyl groups (including phenyl groups substituted by hydroxyl groups) in the phenyl terminals.
- Example 3 The same operation as in Example 2 was carried out except that 0.257 g (0.00218 mol) of 2-ethyl-2-methyl-propane-1,3-diol was added to the reaction system as an aliphatic diol compound.
- Example 4 The same operation as in Example 2 was performed except that 0.288 g (0.00218 mol) of 2,2-diethyl-propane-1,3-diol was added to the reaction system as the aliphatic diol compound.
- Example 5 The same operation as in Example 2 was performed except that 0.410 g (0.00218 mol) of 2,2-diisobutyl-propane-1,3-diol was added to the reaction system as the aliphatic diol compound.
- the temperature of the heating medium was gradually raised, and at the same time the pressure reduction degree was lowered, the phenol distilled from the reaction system was agglomerated and removed with a cooling tube, and a transesterification reaction was carried out. It took about 4 hours, and finally the inside of the system was 260 ° C., the degree of vacuum was 0.13 kPaA (1 torr) or less, and the system was further maintained for 4 hours.
- the terminal hydroxyl group concentration is a value calculated from NMR, and indicates the concentration of terminal hydroxyl groups contained in the entire polymer.
- the Ph terminal concentration is a value calculated from NMR, and represents the terminal concentration of all phenylene groups and phenyl groups (including phenyl groups substituted by hydroxyl groups) in the phenyl terminals.
- the aromatic polycarbonate resin composition of the present invention has a high molecular weight and not only has a good quality such that the content of a specific different structure is below a certain level, but also has the same structure as that obtained by the interface method and is heat resistant. It is mainly composed of an aromatic polycarbonate resin excellent in the above.
- Such an aromatic polycarbonate resin composition has advantages such as a faster molding cycle and a lower molding temperature when used as a substitute for a conventional general-purpose polycarbonate resin or composition. It can be preferably used for various molded articles, sheets, films and the like obtained by molding, extrusion molding, injection blow molding, rotational molding, compression molding and the like.
- the resin is economically excellent and friendly to the natural environment.
- Mw molecular weight retention rate
- the change in YI value is small (for example, +25 or less).
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Abstract
Description
このポリカーボネートの製造方法においては、従来多くの検討がなされている。その中で、芳香族ジヒドロキシ化合物、例えば2,2-ビス(4-ヒドロキシフェニル)プロパン(以下、「ビスフェノールA」という)から誘導されるポリカーボネートは、界面重合法あるいは溶融重合法の両製造方法により工業化されている。
特許文献7(特表2008-514754号公報)には、ポリカーボネートオリゴマーとビスサリチルカーボネート等を押出機に導入して高分子量化する方法が開示されている。
3)前記一般式(1)及び(2)で表される構造単位を、それぞれビフェノール酸換算値で2000ppm以下含有する、1)記載の芳香族ポリカーボネート樹脂組成物。
4)前記一般式(1)及び(2)で表される構造単位を合計で、ビフェノール酸換算値で5000ppm以下含有する、1)記載の芳香族ポリカーボネート樹脂組成物。
N値=(log(Q160値)-log(Q10値))/(log160―log10) ・・・(1)
(1)芳香族ポリカーボネート樹脂
本発明の芳香族ポリカーボネート樹脂組成物は、下記一般式(II)で表される構造単位を主たる構造単位として有する、芳香族ポリカーボネート樹脂を含む。
N値=(log(Q160値)-log(Q10値))/(log160―log10) ・・・(1)
本発明の芳香族ポリカーボネート樹脂組成物には、下記一般式(h2)で表される環状カーボネートが3000ppm以下含まれている。本発明の芳香族ポリカーボネート樹脂組成物は、製造工程で連結剤として使用する脂肪族ジオール化合物に対応する環状カーボネートが副生するが、これを反応系外へ除去したのちに少量の環状ポリカーボネートが残存し、最終的に得られる芳香族ポリカーボネート樹脂組成物中にかかる環状ポリカーボネートが含まれることとなる。
R5~R8は、各々独立して、水素原子、ハロゲン原子又は炭素数1~5の直鎖もしくは分岐のアルキル基を表す。ハロゲン原子としては、フッ素原子が好ましい。
nは0~30、好ましくは1~6、より好ましくは1~3、特に好ましくは1の整数を表す。
R5~R8は、好ましくは、各々独立して、水素原子、フッ素原子又はメチル基を表す。nは、好ましくは、1~6の整数を表す。
本発明の芳香族ポリカーボネート樹脂組成物中には、製造工程で使用した触媒失活剤が含有されていてもよい。触媒失活剤の存在により、樹脂組成物の熱安定性がさらに向上する。
触媒失活剤含有量の上限は特に制限されないが、好ましくは30ppm以下、より好ましくは20ppm以下である。
耐熱安定剤としては、トリフェニルホスフィン(P-Ph3)等の公知のものを用いることができる。
本発明の芳香族ポリカーボネート樹脂組成物は、良好な色相を有する。芳香族ポリカーボネート樹脂の色相評価は一般にYI値にて表わされる。通常、界面重合法から得られる分岐化芳香族ポリカーボネート樹脂のYI値としては0.8~1.0を示す。一方、溶融重合法により得られる芳香族ポリカーボネートの高分子量体は製造工程に伴う品質の低下により、YI値は1.7~2.0を示す。しかしながら本発明の製造方法により得られる高分子量化された芳香族ポリカーボネート樹脂のYI値は界面重合法により得られる芳香族ポリカーボネートと同等のYI値を示し、色相の悪化は見られない。
また本発明の芳香族ポリカーボネート樹脂組成物は、高い耐熱性、より具体的には高い分子量保持率(高温下で熱滞留を課した時の分子量低下をどの程度抑えられるかを表す指標)を有する。本発明の芳香族ポリカーボネート樹脂組成物の熱滞留試験(360℃で60分間)後の分子量(Mw)保持率は、好ましくは50%以上、より好ましくは70%以上である。
・自動車部材として、ヘッドランプレンズ、メータ盤、サンルーフなど、さらにガラス製ウインドウの代替品や外板部品;
・液晶ディスプレイなどの各種フィルム、導光板,光ディスク基板;
・透明シートなどの建材;
・構造部材として、パソコン、プリンタ、液晶テレビなどの筐体。
本発明の芳香族ポリカーボネート樹脂組成物は、芳香族ポリカーボネートプレポリマーと、特定構造の脂肪族ジオール化合物とを、エステル交換触媒の存在下に反応させて高分子量化する高分子量化工程と、前記高分子量化工程で副生する環状カーボネートの少なくとも一部を反応系外へ除去する環状カーボネート除去工程とを含む方法により製造される。
本発明の芳香族ポリカーボネート樹脂組成物の製造方法で用いられる脂肪族ジオール化合物は、下記一般式(g2)で表されるものである。
R5~R8は、各々独立して、水素原子、ハロゲン原子又は炭素数1~5の直鎖もしくは分岐のアルキル基を表す。ハロゲン原子としては、フッ素原子が好ましい。
nは0~30、好ましくは1~6、より好ましくは1~3、特に好ましくは1の整数を表す。
R5~R8は、好ましくは、各々独立して、水素原子、フッ素原子又はメチル基を表す。nは、好ましくは、1~6の整数を表す。
本発明の製造方法で用いられる芳香族ポリカーボネートプレポリマーは、本発明の芳香族ポリカーボネート樹脂を構成する上記一般式(II)で表される構造を主たる繰り返し単位とする重縮合ポリマーである。
すなわち、上記芳香族ポリカーボネートプレポリマーは、その少なくとも一部が芳香族モノヒドロキシ化合物由来の末端基あるいは末端フェニル基(以下、「封止末端基」ともいう)で封止されていることが好ましい。
本発明においては、末端封止された芳香族ポリカーボネートプレポリマーに脂肪族ジオール化合物をエステル交換触媒存在下、減圧条件にて作用させることにより、芳香族ポリカーボネートプレポリマーが高分子量化する。この反応は温和な条件で高速に進み、高分子量化が達成される。すなわち、脂肪族ジオールにより芳香族ポリカーボネートプレポリマーが開裂反応を起こした後エステル交換反応により脂肪族ポリカーボネートユニットが生成する反応よりも、脂肪族ジオール化合物と芳香族ポリカーボネートプレポリマーとの反応が速く進行する。
R5~R8は、各々独立して、水素原子、ハロゲン原子又は炭素数1~5の直鎖もしくは分岐のアルキル基を表す。ハロゲン原子としては、フッ素原子が好ましい。
nは0~30、好ましくは1~6、より好ましくは1~3、特に好ましくは1の整数を表す。
R5~R8は、好ましくは、各々独立して、水素原子、フッ素原子又はメチル基を表す。nは、好ましくは、1~6の整数を表す。
以下に、本発明の芳香族ポリカーボネート樹脂組成物の製造方法の詳細な条件を説明する。
(i)脂肪族ジオール化合物の添加
本発明の製造方法においては、芳香族ポリカーボネートプレポリマーに上記一般式(g2)で表される脂肪族ジオール化合物を添加混合し、高分子量化反応器内で高分子量化反応(エステル交換反応)を行う。
芳香族ポリカーボネートプレポリマーと脂肪族ジオール化合物とのエステル交換反応(高分子量化反応)に使用する温度としては、240℃~320℃の範囲が好ましく、さらに好ましくは260℃~310℃、より好ましくは270℃~300℃である。
本発明の方法では、上記高分子量化反応によって芳香族ポリカーボネートプレポリマーが高分子量化されると同時に、該反応で副生する環状カーボネートの少なくとも一部を反応系外へ除去する。副生する環状カーボネートを反応系外へ除去することによって芳香族ポリカーボネートプレポリマーの高分子量化反応が進行する。
なお、環状カーボネートの含有割合は、GC-MSで測定した値である。
本発明においては、芳香族ポリカーボネートプレポリマーと脂肪族ジオール化合物とのエステル交換反応により、反応後の芳香族ポリカーボネート樹脂の重量平均分子量(Mw)が前記芳香族ポリカーボネートプレポリマーの重量平均分子量(Mw)よりも5,000以上高めることが好ましく、より好ましくは10,000以上、さらに好ましくは15,000以上高めるのが好ましい。
さらに好ましくは、ポリマーシールを有し、脱揮構造をもつ2軸押出機あるいは横型反応機が好適である。
触媒失活剤の添加は、上記高分子量化反応終了後に従来公知の方法でポリカーボネート樹脂に混合することができる。例えば、ターンブルミキサーやヘンシェルミキサー、リボンブレンダー、スーパーミキサーで代表される高速ミキサーで分散混合した後、押出機、バンバリーミキサー、ロール等で溶融混練する方法が適宜選択される。
好ましくは、ポリマーシールを有し、ベント構造をもつ2軸押出機あるいは横型反応機が好適である。
耐熱安定剤としては、トリフェニルホスフィン(P-Ph3)等の公知のものを用いることができる。
Mw=Σ(Wi×Mi)÷Σ(Wi)
Mn=Σ(Ni×Mi)÷Σ(Ni)
ここで、iは分子量Mを分割した際のi番目の分割点、Wiはi番目の重量、Niはi番目の分子数、Miはi番目の分子量を表す。また分子量Mとは、較正曲線の同溶出時間でのポリスチレン分子量値を表す。
装置;東ソー株式会社製、HLC-8320GPC
カラム;ガードカラム:TSKguardcolumn SuperMPHZ-M×1本
分析カラム:TSKgel SuperMultiporeHZ-M×3本
溶媒;HPLCグレードクロロホルム
注入量;10μL
試料濃度;0.2w/v% HPLCグレードクロロホルム溶液
溶媒流速;0.35ml/min
測定温度;40℃
検出器;RI
芳香族ポリカーボネート樹脂組成物をモノマーレベルまでアルカリ加水分解した後、該モノマー中における構造単位(1)-(3)に対応する下記構造の化合物(1)-(3)の含有割合をLC-MS分析により測定して求めた。具体的には、試料0.1gを三角フラスコに採取し、ジクロロメタン10mlに溶解し、次いで28%ナトリウムメトキサイドのメタノール溶液1.8ml、メタノール8ml、水2.6mlを加え、1時間攪拌した。さらに1N-塩酸を12ml加えてpHを酸性とし、10分間攪拌した後に静置した。ジクロロメタン層を採取して10mlに定容した。このジクロロメタン溶液より2mlを抜き取り、窒素気流下で乾固した。この試料にアセトニトリル2ml添加したものをLC-MSにより分析した。
LC:Waters Acquity UPLC
カラム:Waters BEH C18(2.1mm×100mm, 1.7um)
溶離液:A;0.1%-HCO2H aq. B;MeCN
B=25-100%(0-8min), B=100%(8-10min)
流速:0.5ml/min
温度:40℃
検出:UV220nm
MS:Waters, MALDI-Synapt HDMS
スキャン範囲、速度:100-1500/0.3sec
イオン化法:ESI(-)
測定モード:MS
分解能:8500(Vmode)
Capillary電圧:3kV
Cone電圧:30V
Trap collision Energy:6V
Transfer collision Energy:4V
Source温度:150℃
Desolvation温度 :500℃
注入量:1μl
内部標準(質量補正):Leucine Enkephalin (m/z554.2615)
内部標準流速:0.1ml/min
1H-NMRによるプレポリマー(PP)中の末端水酸基濃度は、樹脂サンプル0.05gを1mlの重水素置換クロロホルム(0.05w/v%TMS含有)に溶解し、23℃で1H-NMRを測定することで求めた。具体的には、4.7ppmの水酸基ピークと7.0~7.5ppm付近のフェニル及びフェニレン基(末端フェニル基及びBPA骨格由来のフェニレン基)の積分比より、PP中の末端水酸基濃度(OH濃度)を算出した。
装置:日本電子社製 LA-500 (500MHz)
測定核:1H
relaxation delay : 1s
x_angle : 45deg
x_90_width : 20μs
x_plus : 10μs
scan : 500times
装置:日本電子社製 LA-500 (500MHz)
測定核:1H
relaxation delay : 1s
x_angle : 45deg
x_90_width : 20μs
x_plus : 10μs
scan : 500times
サンプル樹脂10gをジクロロメタン100mlに溶解し、1000mlのメタノール中へ攪拌しながら滴下した。沈殿物を濾別し、濾液中の溶媒を除去した。得られた固体をGC-MSにより以下の測定条件で分析した。なお、この測定条件での検出限界値は0.0005ppmである。
GC-MS測定条件:
測定装置:Agilent HP6890/5973MSD
カラム:キャピラリーカラムDB-5MS,30m×0.25mm I.D., 膜厚0.5μm
昇温条件:50℃(5min hold)-300℃(15min hold),10℃/min
注入口温度:300℃、打ち込み量:1.0μl(スプリット比25)
イオン化法:EI法
キャリアーガス:He,1.0ml/min
Aux温度:300℃
質量スキャン範囲:33-700
溶媒:HPLC用クロロホルム
内部標準物質:2,4,6-トリメチロールフェノール
以下の実施例で、2,2-ビス(4-ヒドロキシフェニル)プロパンを「BPA」、ジフェニルカーボネートを「DPC」、プレポリマーを「PP」、水酸基を「OH基」、フェニル基を「Ph]と略すことがある。
2,2-ビス(4-ヒドロキシフェニル)プロパン10001.0g(43.808モル)、ジフェニルカーボネート10557.0g(49.281モル)及び触媒として炭酸水素ナトリウムを1.0μmol/mol-BPA(触媒は2,2-ビス(4-ヒドロキシフェニル)プロパンに対してのモル数として計算)とを攪拌機及び留出装置付の50LのSUS製反応器に入れ、系内を窒素雰囲気下に置換した。減圧度を27kPaA(200torr)に調整し、熱媒を205℃に設定、原料を加熱溶融した後、攪拌を行なった。
2,2-ビス(4-ヒドロキシフェニル)プロパン10,000.6g(43.807モル)、ジフェニルカーボネート10,560.0g(49.295モル)及び触媒として炭酸セシウムを0.5μmol/mol-BPA(触媒は2,2-ビス(4-ヒドロキシフェニル)プロパンに対してのモル数として計算)とを攪拌機及び留出装置付の50LのSUS製反応器に入れ、系内を窒素雰囲気下に置換した。減圧度を27kPaA(200torr)に調整し、熱媒を205℃に設定、原料を加熱溶融した後、攪拌を行なった。
脂肪族ジオール化合物として2-エチル-2-メチル-プロパン-1,3-ジオール0.257g(0.00218mol)を反応系へ添加する以外は、実施例2と同様の操作を行なった。得られたポリカーボネート樹脂は、重量平均分子量(Mw)=48,000、N値=1.23、末端水酸基濃度=200ppm、YI値=1.1であり、異種構造式(1)=100ppm、異種構造式(2)=20ppm、異種構造式(3)=60ppm、環状カーボネート(5-エチル-5-メチル-1,3-ジオキサン-2-オン)=30ppmを含有していた。
脂肪族ジオール化合物として2,2-ジエチル-プロパン-1,3-ジオール0.288g(0.00218mol)を反応系へ添加する以外は、実施例2と同様の操作を行なった。得られたポリカーボネート樹脂は、重量平均分子量(Mw)=47,000、N値=1.19、末端水酸基濃度=180ppm、YI値=0.9であり、異種構造式(1)=50ppm、異種構造式(2)=20ppm、異種構造式(3)=40ppm、環状カーボネート(5,5-ジエチル-1,3-ジオキサン-2-オン)=60ppmを含有していた。
脂肪族ジオール化合物として2,2-ジイソブチル-プロパン-1,3-ジオール0.410g(0.00218mol)を反応系へ添加する以外は、実施例2と同様の操作を行なった。得られたポリカーボネート樹脂は、重量平均分子量(Mw)=42,000、N値=1.21、末端水酸基濃度=380ppm、YI値=0.9であり、異種構造式(1)=120ppm、異種構造式(2)=20ppm、異種構造式(3)=30ppm、環状カーボネート(5,5-ジイソブチル-1,3-ジオキサン-2-オン)=700ppmを含有していた。
2,2-ビス(4-ヒドロキシフェニル)プロパン10,000.0g(43.804モル)、ジフェニルカーボネート9,618.0g(44.898モル)及び触媒として炭酸セシウムを0.5μmol/mol-BPA(触媒は2,2-ビス(4-ヒドロキシフェニル)プロパンに対してのモル数として計算)とを攪拌機及び留出装置付の50LのSUS製反応器に入れ、系内を窒素雰囲気下に置換した。減圧度を27kPaA(200torr)に調整し、熱媒を205℃に設定、原料を加熱溶融した後、攪拌を行なった。
Claims (12)
- 下記一般式(II)で表される構造単位、並びに下記一般式(1)及び(2)で表される構造単位のうち少なくとも一つの単位を有する芳香族ポリカーボネート樹脂を含む芳香族ポリカーボネート樹脂組成物であって、前記一般式(1)及び(2)で表される構造単位のいずれかをビフェノール酸換算値で2000ppm以下含有し、且つ下記一般式(h2)で表される環状カーボネートを3000ppm以下含有する、芳香族ポリカーボネート樹脂組成物:
一般式(II):
(式中、R1及びR2は、各々独立して、ハロゲン原子、炭素数1~20のアルキル基、炭素数1~20のアルコキシ基、炭素数6~20のシクロアルキル基、炭素数6~20のアリール基、炭素数6~20のシクロアルコキシ基、又は炭素数6~20のアリールオキシ基を表し、p及びqは、0~4の整数を表し、Xは、単結合又は下記(II’)の群から選択される基を表す)
(ここで、R3及びR4は、各々独立して、水素原子、炭素数1~10のアルキル基、又は炭素数6~10のアリール基を表すか、あるいはR3とR4は、相互に結合して脂肪族環を形成していてもよい);
一般式(1):
一般式(2):
(式中、Xは、一般式(II)におけるのと同じである);
一般式(h2):
(式中、Ra及びRbは、各々独立して、水素原子、ハロゲン原子、酸素原子もしくはハロゲン原子を含んでいてもよい炭素数1~30の直鎖もしくは分岐のアルキル基、酸素原子もしくはハロゲン原子を含んでいてもよい炭素数3~30のシクロアルキル基、酸素原子もしくはハロゲン原子を含んでいてもよい炭素数6~30のアリール基、又は酸素原子もしくはハロゲン原子を含んでいてもよい炭素数1~15のアルコキシ基を表すか、あるいはRa及びRbは、相互に結合して環を形成していてもよく、R5~R8は、各々独立して、水素原子、ハロゲン原子又は炭素数1~5の直鎖もしくは分岐のアルキル基を表し、nは0~30の整数を表す)。 - 前記一般式(1)で表される構造単位をビフェノール酸換算値で2000ppm以下含有する、請求項1記載の芳香族ポリカーボネート樹脂組成物。
- 前記一般式(1)及び(2)で表される構造単位を、それぞれビフェノール酸換算値で2000ppm以下含有する、請求項1記載の芳香族ポリカーボネート樹脂組成物。
- 前記一般式(1)及び(2)で表される構造単位を、合計でビフェノール酸換算値で5000ppm以下含有する、請求項1記載の芳香族ポリカーボネート樹脂組成物。
- 前記一般式(h2)で表される環状カーボネートが、下記一般式(h3)で表される化合物である、請求項1記載の芳香族ポリカーボネート樹脂組成物。
一般式(h3):
(式中、Ra及びRbは、各々独立して、水素原子、ハロゲン原子、酸素原子もしくはハロゲン原子を含んでいてもよい炭素数1~30の直鎖もしくは分岐のアルキル基、酸素原子もしくはハロゲン原子を含んでいてもよい炭素数3~30のシクロアルキル基、酸素原子もしくはハロゲン原子を含んでいてもよい炭素数6~30のアリール基、又は酸素原子もしくはハロゲン原子を含んでいてもよい炭素数1~15のアルコキシ基を表すか、あるいはRa及びRbは、相互に結合して環を形成していてもよい)。 - 重量平均分子量(Mw)が30,000~100,000である、請求項1記載の芳香族ポリカーボネート樹脂組成物。
- 下記数式(1)で表されるN値(構造粘性指数)が1.25以下である、請求項1記載の芳香族ポリカーボネート樹脂組成物。
N値=(log(Q160値)-log(Q10値))/(log160―log10) ・・・(1) - 熱滞留試験(360℃で60分間)後の分子量(Mw)保持率が50%以上である、請求項1記載の芳香族ポリカーボネート樹脂組成物。
- 請求項1記載の芳香族ポリカーボネート樹脂組成物を製造する方法であって、芳香族ポリカーボネートプレポリマーと下記一般式(g2)で表される脂肪族ジオール化合物とをエステル交換触媒の存在下に反応させて高分子量化する高分子量化工程と、前記高分子量化工程で副生する環状カーボネートの少なくとも一部を反応系外へ除去する環状カーボネート除去工程とを含む、方法:
一般式(g2):
(式中、Ra及びRbは、各々独立して、水素原子、ハロゲン原子、酸素原子もしくはハロゲン原子を含んでいてもよい炭素数1~30の直鎖もしくは分岐のアルキル基、酸素原子もしくはハロゲン原子を含んでいてもよい炭素数3~30のシクロアルキル基、酸素原子もしくはハロゲン原子を含んでいてもよい炭素数6~30のアリール基、又は酸素原子もしくはハロゲン原子を含んでいてもよい炭素数1~15のアルコキシ基を表すか、あるいはRa及びRbは、相互に結合して環を形成していてもよく、R5~R8は、各々独立して、水素原子、ハロゲン原子又は炭素数1~5の直鎖もしくは分岐のアルキル基を表し、nは、0~30の整数を表す)。 - 前記一般式(g2)で表される脂肪族ジオール化合物が、下記一般式(g3)で表される化合物であることを特徴とする、請求項10記載の製造方法:
一般式(g3):
(式中、Ra及びRbは、各々独立して、水素原子、ハロゲン原子、酸素原子もしくはハロゲン原子を含んでいてもよい炭素数1~30の直鎖もしくは分岐のアルキル基、酸素原子もしくはハロゲン原子を含んでいてもよい炭素数3~30のシクロアルキル基、酸素原子もしくはハロゲン原子を含んでいてもよい炭素数6~30のアリール基、又は酸素原子もしくはハロゲン原子を含んでいてもよい炭素数1~15のアルコキシ基を表すか、あるいはRa及びRbは、相互に結合して環を形成していてもよい)。 - 前記脂肪族ジオール化合物が、2-ブチル-2-エチルプロパン-1,3-ジオール、2,2-ジイソブチルプロパン-1,3-ジオール、2-エチル-2-メチルプロパン-1,3-ジオール、2,2-ジエチルプロパン-1,3-ジオール、及び2-メチル-2-プロピルプロパン-1,3-ジオールからなる群から選択される、請求項11記載の製造方法。
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| HK16101722.5A HK1213928A1 (en) | 2012-11-17 | 2013-11-15 | Aromatic polycarbonate resin composition |
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| US14/442,892 US9428608B2 (en) | 2012-11-17 | 2013-11-15 | Aromatic polycarbonate resin composition |
| RU2015123120A RU2015123120A (ru) | 2012-11-17 | 2013-11-15 | Композиция ароматической поликарбонатной смолы |
| CN201380059831.XA CN104837891A (zh) | 2012-11-17 | 2013-11-15 | 芳香族聚碳酸酯树脂组合物 |
| HK15112695.6A HK1211969A1 (en) | 2012-11-17 | 2013-11-15 | Aromatic polycarbonate resin composition |
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| JP2021121673A (ja) * | 2016-03-30 | 2021-08-26 | 三菱瓦斯化学株式会社 | 芳香族ポリカーボネート樹脂組成物及び芳香族ポリカーボネート樹脂の製造方法 |
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| JP2021121673A (ja) * | 2016-03-30 | 2021-08-26 | 三菱瓦斯化学株式会社 | 芳香族ポリカーボネート樹脂組成物及び芳香族ポリカーボネート樹脂の製造方法 |
| JP7143920B2 (ja) | 2016-03-30 | 2022-09-29 | 三菱瓦斯化学株式会社 | 芳香族ポリカーボネート樹脂組成物及び芳香族ポリカーボネート樹脂の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2015123120A (ru) | 2017-01-10 |
| JP6131961B2 (ja) | 2017-05-24 |
| EP2921516A4 (en) | 2016-07-06 |
| JPWO2014077341A1 (ja) | 2017-01-05 |
| KR20150086328A (ko) | 2015-07-27 |
| CN104837891A (zh) | 2015-08-12 |
| US9428608B2 (en) | 2016-08-30 |
| TW201439195A (zh) | 2014-10-16 |
| HK1213928A1 (en) | 2016-07-15 |
| EP2921516A1 (en) | 2015-09-23 |
| US20150284509A1 (en) | 2015-10-08 |
| KR102159519B1 (ko) | 2020-09-24 |
| HK1211969A1 (en) | 2016-06-03 |
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