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WO1989008676A1 - Preparation de melange thermoplastique modifie par un additif - Google Patents

Preparation de melange thermoplastique modifie par un additif Download PDF

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Publication number
WO1989008676A1
WO1989008676A1 PCT/US1989/000865 US8900865W WO8908676A1 WO 1989008676 A1 WO1989008676 A1 WO 1989008676A1 US 8900865 W US8900865 W US 8900865W WO 8908676 A1 WO8908676 A1 WO 8908676A1
Authority
WO
WIPO (PCT)
Prior art keywords
resin
concentrate
additives
thermoplastic
molded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1989/000865
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English (en)
Inventor
Michael K. Laughner
Ronald R. Smith
Kenneth R. Shaw
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Priority to KR1019890702075A priority Critical patent/KR900700535A/ko
Publication of WO1989008676A1 publication Critical patent/WO1989008676A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2469/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates

Definitions

  • the present invention relates to a process for the preparation of an additive-modified thermoplastic. More particularly, the present invention relates to a process for preparing a concentrated additive-modified thermoplastic polycarbonate resin, aromatic polyester carbonate resin or mixture of polycarbonate and aromatic polyester carbonate resin and thereafter blending this concentrate with a thermoplastic resin to prepare the desired resin blend.
  • thermoplastics incorporating polycarbonate resins, aromatic polyester carbonate resins, mixtures of polycarbonate and aromatic polyester carbonate resins, and mixtures of the foregoing with other resins such as, for example, polyesters, polyphenylene oxide, and ABS resins
  • other resins such as, for example, polyesters, polyphenylene oxide, and ABS resins
  • impact properties as measured by Izod impact, Gardener impact, Dart drop or other instrumented impact measurement may be deleteriously affected.
  • the additive concentrate and the let-down resin in a molding machine or other suitable blending device immediately prior to the molding of objects therefrom.
  • This operation is known as "direct molding".
  • available equipment is designed to melt the resin and not necessarily obtain thorough mixing and thus direct molding often fails to obtain complete and adequate dispersion of the let-down resin and the additive concentrate.
  • the resulting molded part prepared by direct molding often does not achieve impact properties as high as would be desired. Addition of a mixing nozzle or similar device may overcome some of these difficulties, however, a continued need for improvement still exists.
  • a second application for the present invention concerns the utilization of scrap resins obtained by trimming of excess resin from molded parts or by recycling defective plastic parts (referred to in the industry as "regrind" resin).
  • regrind resin defective plastic parts
  • Effective blending of such regrind resins which may include paint and other contaminants is often not possible utilizing the molding machines or even extruders or other mixing equipment presently available.
  • molded objects incorporating regrind often fail to exhibit physical properties, particularly impact properties, as high as are obtained by objects prepared from virgin resins.
  • a concentrate resin comprising a) a polycarbonate resin, an aromatic polyester carbonate resin, or a mixture thereof; b) at least one of the 0 additives including colorants, pigments, thermal stabilizers, ultraviolet stabilizers, radiation stabilizers, mold release additives, ignition resistant additives, fillers, reinforcing aids, blowing agents,
  • let-down resin comprising a 30 thermoplastic resin that is substantially free of additives and capable of dispersing the concentrate resin
  • a concentrate resin comprising a) a polycarbonate resin, an aromatic polyester carbonate resin, or a mixture thereof; b) at least one of the 10 additives including colorants, pigments, thermal stabilizers, ultraviolet stabilizers, radiation stabilizers, mold release additives, ignition resistant additives, fillers, reinforcing aids, blowing agents, plasticizers, flow enhancers, lubricants, anti-fogging
  • thermoplastic being capable of dispersing the concentrate resin
  • Suitable rubbery polymers for use according to the present invention include the homopolymers and copolymers of conjugated dienes, homopolymers and copolymers of alpha olefins, homopolymers and copolymers of C-i o alkyl acrylates and methacrylates, 5 graft copolymers thereof, and mixtures thereof.
  • Such rubbery polymers have a glass transition temperature (T g ) of less than 25°C.
  • Most preferred rubbery polymers are graft copolymers of rubbery substrate polymers.
  • Suitable rubbery substrate polymers include homopolymers and copolymers of butadiene or isoprene wherein the comonomer is selected from the group consisting of styrene, acrylonitrile, methyl methacrylate and mixtures thereof; homopolymers of C_ j .__g alkyl acrylates or copolymers of Ci__g alkyl acrylates with one or more copolymerizable comonomers;
  • Suitable grafting polymers include homopolymers of vinyl aromatic monomers or C- ] _ alkyl M ,- methacrylate monomers, or copolymers thereof and copolymers of the above monomers with other ethylenically unsaturated comonomers, especially acrylonitrile.
  • Preferred rubbery polymers are the acrylate multiphase composite interpolymers which comprise a C- j -C ⁇ acrylate and C- ] _c j methacrylate as disclosed in U.S. Patent No. 4,260,693 and U.S. Patent No. 4,096,202. These interpolymers comprise from 25 to 95
  • first elastomeric phase 25 weight percent of a first elastomeric phase and from 75 to 5 weight percent of a final rigid thermoplastic phase.
  • One or more intermediate phases are optional, for example a middle stage polymerized from 75 to 100 percent by weight styrene.
  • the first stage is
  • the preferred alkyl acrylate is n-butyl acrylate.
  • the crosslinking monomer is a polyethylenically unsaturated monomer having a plurality of addition polymerizable reactive groups _all of which polymerize at substantially the same rate of reaction.
  • Suitable crosslinking monomers include, for example, poly acrylic and poly methacrylic esters of polyols such as, for example, butylene diacrylate and dimethacrylate, trimethylol propane and trimethacrylate; di- and trivinyl benzene, vinyl acrylate and methacrylate.
  • the preferred crosslinking monomer is butylene diacrylate.
  • the crosslinking monomer is a polyethylenically unsaturated monomer having a plurality of addition polymerizable reactive groups, at least one of which polymerizes at a substantially different rate of polymerization from at least one of the other reactive groups.
  • the function of the graftlinking monomer is to provide a residual level of unsaturation in the elastomeric phase, particularly in the latter stages of polymerization and, consequently, at or near the surface of the elastomer particles.
  • allyl group- containing monomers such as allyl esters of ethylenically unsaturated acids such as allyl acrylate, allyl methacrylate, diallyl maleate, diallyl fumarate, diallyl itaconate, allyl acid maleate, allyl acid fumarate, and allyl acid itaconate.
  • diallyl esters of polycarboxylic acids which do not contain polymerizable unsaturation.
  • the preferred graftlinking monomers are allyl methacrylate and diallyl maleate.
  • a preferred interpolymer has only two stages, the first stage comprising from 60 to 95 percent by weight of the interpolymer and being polymerized from a monomer system comprising from 95 to 99.8 percent by weight n-butyl acrylate, from 0.1 to 2.5 percent by weight butylene diacrylate as crosslinking agent, from 0.1 to 2.5 percent by weight allyl methacrylate or diallyl maleate as a graftlinking agent, with a final stage polymerized from 60 to 100 percent by weight methyl methacrylate.
  • a preferred multiphase composite interpolymer 10 of the foregoing description is commercially available from Rohm and Haas Company as the Paraloid ® EXL 3300 series of resins. These interpolymers have a weight ratio of 4 parts n-butyl acrylate to 1 part methyl methacrylate, the remainder of the weight being
  • another preferred class of rubbery polymers comprises graft 0 copolymers of a vinyl aromatic monomer and an alkyl methacrylate on a diene based rubbery substrate.
  • Suitable diene based rubbery substrates include homopolymers of butadiene and copolymers thereof with p c up to 50 percent by weight of a copolymerizable comonomer, particularly styrene.
  • Suitable MBS polymers are available commercially from Rohm and Haas Company under the trade designation Paraloid ® EXL 3600.
  • the rubber is preferably incorporated into the 35 concentrate in an amount of from 0.1 to 50 percent, more preferably from 5.0 to 50 percent, and most preferably from 8.0 to 45 percent, based on the total weight of the concentrate resin.
  • Preferred rubbers have a number average particle_ size of less than 0.5 ⁇ , more preferably less than 0.3 ⁇ .
  • An especially preferred rubber is of the MBS type having a number average particle size less than 0.2 ⁇ . These rubbers are available from M & T Chemicals under the trade designation Metablen C-223.
  • the polycarbonates that can be employed in the practice of this invention are homopolymers and copolymers and mixtures thereof that are prepared by reacting a dihydric phenol with a carbonate precursor.
  • the dihydric phenols that can be employed are bis-phenols such as bis( ⁇ -hydroxyphenyl)methane, 2,2- bis(4-hydroxyphenyl)propane (bisphenol-A) , 2,2-bis(4- hydroxy-3-methy1phenyl)propane, ⁇ ,4-bis(4- hydroxyphenyl)heptane, 2,2-bis( -hydroxy-3 > 5- dichlorophenyl)propane, 2,2-bis(iJ-hydroxy-3»5- dibromophenyl)propane; dihydric phenol ethers such as bis(4-hydroxyphenyl)ether, bis(3,S-dichloro- ⁇ - hydroxylphenyl)ethe ; dihydroxydiphenyls such as p,p'- dihydroxydiphenyl, 3 » 3'-dichloro-lJ ⁇ -dihydroxydiphenyl; dihydroxyaryl sulfones such as bis(4- hydroxyphenyDsulfone,
  • halogen-containing dihydric phenols such as 2,2-bis(3,5-diehloro-4- hydroxypheny1) ropane, 2,2-bis(3,5-dibromo-4- hydroxyphenyl)propane. It is also possible to employ two or more different dihydric phenols or a copolymer of a dihydric phenol with a glycol or with a hydroxy or acid terminated polyester, or with a dibasic acid in the event a copolymer or interpolymer rather than a homopolymer is desired.
  • the carbonate precursor can be either a carbonyl halide, a carbonate ester or a haloformate.
  • the carbonyl halides which can be employed are carbonyl bromide, carbonyl chloride and mixtures thereof.
  • Typical of the carbonate esters that can be employed are diphenyl carbonate, di-(halophenyl) carbonates such as di(chlorophenyl)carbonate, di-(bromophenyl) carbonate, di-(trichlorophenyl) carbonate, di- (tribromophenyl)carbonate; dif-(alkylphenyl) carbonate such as di-(tolyl) carbonate, di-(naphthyl) carbonate, di(chloronaphthyl) carbonate, phenyl tolyl carbonate, chlorophenyl chloronaphthyl carbonate, or mixtures thereof.
  • haloformates suitable for use herein include bishaloformates of dihydric phenols (bischloroformates of hydroquinone) or glycols (bishaloformates of ethylene glycol, neopentyl glycol, or polyethylene glycol). While other carbonate precursors will occur to those skilled in the art, carbonyl chloride, also known as phosgene, is preferred.
  • branched polycarbonates wherein a polyfunctional aromatic compound is reacted with the dihydric phenol and carbonate precursor to provide a thermoplastic randomly branched polycarbonate.
  • polyfunctional aromatic compounds contain c at least three functional groups which are carboxyl, carboxylic anhydride, haloformyl or mixtures thereof.
  • these polyfunctional aromatic compounds include trimellitic anhydride, trimellitic acid, trimellityl trichloride, 4-chloroformyl phthalic 10 anhydride, pyromellitic acid, pyromellitic dianhydride, mellitic acid, mellitic anhydride, trimesic acid, benzophenonetetracarboxylic acid, and benzophenone- tetracarboxylic anhydride.
  • trimellitic anhydride trimellitic acid, trimellityl trichloride, 4-chloroformyl phthalic 10 anhydride, pyromellitic acid, pyromellitic dianhydride, mellitic acid, mellitic anhydride, trimesic acid, benzophenonetetracarboxylic acid, and benzophenone- tetracarboxy
  • blends of a branched polycarbonate, a linear polycarbonate and/or an 0 aromatic polyester carbonate are also included herein.
  • Aromatic polyester carbonates for use according to the present invention include the polymeric derivatives formed by reaction of a di-hydric phenol, 5 one or more dicarboxylic acids or acid anhydrides and a carbonate precursor. These are disclosed in U.S. Patent No. 3,169,121. Of course, blends of more than one polycarbonate or aromatic polyester carbonate may 0 also be employed.
  • the polycarbonates and aromatic polyester carbonates may be prepared by employing a molecular weight regulator, an acid acceptor and a catalyst.
  • the C molecular weight regulators which can be employed include, for example, monohydric phenols such as phenol, chroman-I, paratertiary-butyl-phenol, parabromophenol, primary and secondary amines.
  • para t-butyl pheno. is employed as the molecular weight regulator.
  • a suitable acid acceptor can be either an organic or an inorganic acid acceptor.
  • a suitable organic acid acceptor is a tertiary amine and includes such materials as, for example, pyridine, triethylamine, dimethylaniline, and tributyla ine.
  • the inorganic acid acceptor can be one which can be either a hydroxide, a carbonate, a bicarbonate, or a phosphate of an alkali or alkaline earth metal.
  • the catalysts which can be employed can be any of the suitable catalysts that aid the polymerization of the dihydric phenol and carbonate precursor.
  • Suitable catalysts include tertiary amines such as triethylamine, tripropylamine, N,N-dimethylaniline, quaternary ammonium compounds, such as tetraethylammonium bromide, cetyl triethylammonium bromide, tetra-n-heptylammonium iodide, tetra-n- propylammonium bromide, tetramethyl-ammonium chloride, tetramethylammonium hydroxide, tetra-n-butylammonium iodide, benzyl trimethylammonium chloride and quaternary phosphonium compounds such as n- butyltriphenyl phosphonium bromide and methyltriphenyl phosphonium bromide.
  • Additives incorporated into the additive- modified blend according to the present invention include the conventional additives, modifiers and adjuvants well known in the art.
  • colorants such as dyes and pigments
  • the best reproducibility of colored tints has been obtained by the inclusion of such an MBS rubber.
  • an apparently previously unknown degradation of the polycarbonate resin caused by the presence of certain pigments has been discovered to be reduced or even eliminated due to the presence of the rubber.
  • fillers is included talc, clay, mica, or glass microspheres or flakes and other extenders, and electrically conductive fillers, e.g. stainless steel powder.
  • Reinforcing aids include, for example, organic or inorganic fibers, carbon fibers, glass and fibers.
  • Blowing agents include the azo and chlorofluorocarbon blowing agents.
  • Plasticizers include, for example, the well known phthalates.
  • Ignition resistant additives include fibril forminpj polytetrafluoroethylene polymers, metal sulfates, and metal bisulfates, phosphate esters and halogenated compounds.
  • Flow enhancers includes low molecular weight polymers and waxes such as polyethylene wax.
  • Lubricants include the alkali metal and alkaline earth metal stearates and mineral oil.
  • Biocidal agents include antimicrobial and anti-fungal agents.
  • Anti-static agents are added to increase surface conductivity while anti-blocking aids may be added to decrease sticking of surfaces of objects placed adjacent to one another.
  • additives are employed in relatively large amounts taking into consideration the fact that the concentrate is meant to be diluted with additional resin to produce the ultimate product. Generally, total amounts of additives of from 0.1 to 60.0 percent based on total concentrate weijjht are employed.
  • thermoplastic resins employed as let-down resins include any thermoplastic resin that is capable of blending with the above mentioned concentrate resins to form a well dispersed blend.
  • well dispersed is meant the blend does not demonstrate visible inhomogeneous regions.
  • Suitable thermoplastic resins include the aforementioned polycarbonates; aromatic polyester carbonates; homopolymers or interpolymers of vinylaromatic monomers, C-
  • Examples include: polystyrene; rubber-modified polystyrene wherein the rubber is a diene homopolymer or copolymer, an ethylene/propylene copolymer or an ethylene/ propylene/diene terpolymer; styrene/ acrylonitrile; rubber modified styrene/acrylonitrile (ABS, AES); polyethylene terephthalate; polybutylene terephthalate; and polyphenylene ether.
  • Regrind resin will, of course, comprise the recycled thermoplastic resin utilized to prepare molded or extruded objects which is recycled to avoid waste.
  • Such regrind may include small amounts. of additives utilized in the process under consideration.
  • Suitable thermoplastic resins include those resin of the previously disclosed list.
  • a dark colored pigment may be added to the concentrate to provide a uniform color to the resulting molded object. Carbon black is often selected as such a pigment.
  • amounts of a virgin resin (let-down resin) may be included in the blend.
  • the additive concentrate and let-down and/or regrind resin are combined in a weight ratio of from 1:100 to 1:4. It is further preferred to employ the regrind in an amount of from 50 to 100 percent by weight based on combined weight of regrind and let-down resin.
  • Example 1 and Comparative 1 and 2 concentrates were prepared utilizing a bisphenol A polycarbonate having a weight average molecular weight (Mw) of 20,000 and containing various pigment ' s.
  • the concentrates differed in that Example 1 additionally contained a rubber (Paraloid ® 3607) available from Rohm and Haas Company, whereas comparative 1 contained no rubber.
  • the concentrates were compounded by single passes through a Werner- Pfeiderer twin screw extruder under the conditions specified in Table I.
  • a well compounded additive containing resin (Comparative 2) was also prepared utilizing the same polycarbonate resin employed as the above described polycarbonate let-down resin The resin was blended thoroughly according to conventional processing techniques.
  • Example 2 The resin utilized in Example 2 was prepared substantially according to the procedure described for Example 1 excepting that the resin employed in preparing the concentrate was a blend of a bisphenol-A polycarbonate and an ABS resin (Pulse ® 830, available from The Dow Chemical Company).
  • Zone 4 (rear) 227777 227700 227777 277
  • the concentrated resin containing rubber (Ex. 1) demonstrates a higher elastic modulus resulting in improved melt strength giving improved uniformity (less surging and strand drops) during extruder processing and pelletizing thereof. Moreover, at high shear rates the concentrate demonstrates viscosities similar to those of resins lacking rubber modifiers. At low shear rates the rubber modified concentrate demonstrates higher viscosity and improved melt strength thereby explaining the improvement in pelletizing performance.
  • the concentrate resin made from a blend of polycarbonate resin and ABS demonstrated 100 percent ductile failure at -20°F. (-29°C.) for a 10 mil (0.25mm) thick specimen, indicating good commercial properties in the resulting blend prepared utilizing merely a single pass through the molding machine.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

Cette invention concerne un procédé de préparation de mélanges de résines thermoplastiques modifiés par un additif, consistant à combiner un polycarbonate modifié par du caoutchouc ou une résine concentrée contenant du carbonate de polyester aromatique avec une résine non modifiée et/ou une résine rebroyée. Grâce à ce procédé, il est possible aux fabricants de pièces moulées tirées de résines thermoplastiques, de réaliser des économies substantielles de matière première, de fonds de roulement, de transport, de stockage et d'autres coûts, ainsi que d'arriver à plus de souplesse dans l'approvisionnement des mélanges desirés modifiés par un additif.
PCT/US1989/000865 1988-03-09 1989-03-03 Preparation de melange thermoplastique modifie par un additif Ceased WO1989008676A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019890702075A KR900700535A (ko) 1988-03-09 1989-03-03 첨가제 개질된 열가소성 블렌드의 제조

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14118488A 1988-03-09 1988-03-09
US141,184 1988-03-09

Publications (1)

Publication Number Publication Date
WO1989008676A1 true WO1989008676A1 (fr) 1989-09-21

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PCT/US1989/000865 Ceased WO1989008676A1 (fr) 1988-03-09 1989-03-03 Preparation de melange thermoplastique modifie par un additif

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KR (1) KR900700535A (fr)
AU (1) AU4188889A (fr)
CA (1) CA1331064C (fr)
WO (1) WO1989008676A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4100589A1 (de) * 1991-01-11 1992-07-16 Bayer Ag Konzentrate von zusatzstoffen auf basis polymerer bindemittel und ihre verwendung
EP0570600A4 (fr) * 1991-12-05 1994-03-18 Sony Corp Materiau resineux recupere sur un disque d'enregistrement optique et procede pour sa recuperation.
EP0601785A1 (fr) * 1992-12-03 1994-06-15 General Electric Company Agent de nucléation pour mousses de thermoplastiques
EP0801108A3 (fr) * 1996-04-12 1998-02-04 Sinco Engineering S.p.A. Résines de polyester ayant des caractéristiques rhéologiques améliorées
EP0803537A3 (fr) * 1996-04-25 1998-08-12 General Electric Company Compositions à mouler polyester-polycarbonate résistantes aux chocs

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162695A (en) * 1961-06-26 1964-12-22 Borg Warner Blends of polycarbonates with butadiene-styrene, methyl methacrylate, styrene graft copolymer
US4464487A (en) * 1982-12-17 1984-08-07 The Dow Chemical Company Process for preparing additive concentrates for carbonate polymers
US4487881A (en) * 1983-10-03 1984-12-11 Mobay Chemical Corporation Impact improvement of reinforced polycarbonate/ABS blends
US4579905A (en) * 1983-08-15 1986-04-01 General Electric Company Graftlinked polymers and process for making
JPS62265345A (ja) * 1986-05-13 1987-11-18 Idemitsu Petrochem Co Ltd ポリカ−ボネ−ト樹脂組成物の製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162695A (en) * 1961-06-26 1964-12-22 Borg Warner Blends of polycarbonates with butadiene-styrene, methyl methacrylate, styrene graft copolymer
US4464487A (en) * 1982-12-17 1984-08-07 The Dow Chemical Company Process for preparing additive concentrates for carbonate polymers
US4579905A (en) * 1983-08-15 1986-04-01 General Electric Company Graftlinked polymers and process for making
US4487881A (en) * 1983-10-03 1984-12-11 Mobay Chemical Corporation Impact improvement of reinforced polycarbonate/ABS blends
JPS62265345A (ja) * 1986-05-13 1987-11-18 Idemitsu Petrochem Co Ltd ポリカ−ボネ−ト樹脂組成物の製造方法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4100589A1 (de) * 1991-01-11 1992-07-16 Bayer Ag Konzentrate von zusatzstoffen auf basis polymerer bindemittel und ihre verwendung
DE4100589C2 (de) * 1991-01-11 1998-04-16 Bayer Ag Konzentrate von Zusatzstoffen auf Basis polymerer Bindemittel und ihre Verwendung
EP0570600A4 (fr) * 1991-12-05 1994-03-18 Sony Corp Materiau resineux recupere sur un disque d'enregistrement optique et procede pour sa recuperation.
US5445555A (en) * 1991-12-05 1995-08-29 Sony Corporation Resin material reclaimed from optical recording disk and method of reclaiming same
EP0601785A1 (fr) * 1992-12-03 1994-06-15 General Electric Company Agent de nucléation pour mousses de thermoplastiques
EP0801108A3 (fr) * 1996-04-12 1998-02-04 Sinco Engineering S.p.A. Résines de polyester ayant des caractéristiques rhéologiques améliorées
EP0803537A3 (fr) * 1996-04-25 1998-08-12 General Electric Company Compositions à mouler polyester-polycarbonate résistantes aux chocs

Also Published As

Publication number Publication date
KR900700535A (ko) 1990-08-16
AU4188889A (en) 1989-10-05
CA1331064C (fr) 1994-07-26

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