WO2015025577A1 - 縮合硬化型シリコーン樹脂組成物、縮合硬化型シリコーン樹脂硬化物、及び、光半導体素子封止体 - Google Patents
縮合硬化型シリコーン樹脂組成物、縮合硬化型シリコーン樹脂硬化物、及び、光半導体素子封止体 Download PDFInfo
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
- C08G77/26—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen nitrogen-containing groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
- C08L83/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/38—Polysiloxanes modified by chemical after-treatment
- C08G77/382—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon
- C08G77/388—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
- C08L83/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
- C09J183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/852—Encapsulations
- H10H20/854—Encapsulations characterised by their material, e.g. epoxy or silicone resins
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
- C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxyl groups
Definitions
- Condensation-curable silicone resins are widely used as electronic materials such as potting materials and as sealants for construction, and these react with moisture in the air and become rubbery by condensation-curing reaction, so that they contact during curing. The adhesiveness with the substrate is expressed.
- the conventional condensation-curable silicone resin has a problem of low adhesion to the constituent members of the semiconductor material.
- PPA polyphthalamide resin
- the present invention is a condensation curable silicone resin composition containing a condensation curable silicone resin mixture and an adhesion promoter, wherein the adhesion promoter is a structural unit represented by the following formula (1-1): And a structural unit represented by the following formula (1-2) and / or a structural unit represented by the following formula (1-4) It is a condensation curable silicone resin composition containing a compound.
- each A is independently an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group, an aryl group, an aralkyl group, or the following formula (2) It is a group.
- at least one A is a group represented by formula (2).
- R 2a represents an alkylene group having 1 to 8 carbon atoms in which some of the carbon atoms except for the carbon atom bonded to the silicon atom may be substituted with an oxygen atom
- each R 2b is independently
- Each represents an alkylene group having 1 to 3 carbon atoms
- each R 3 independently represents an alkylene group having 1 to 3 carbon atoms
- each R 4 independently represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, It represents an alkyl group having 1 to 3 carbon atoms having an OH group, or a halogeno group.
- x is an integer of 0-2. The present invention is described in detail below.
- the present inventor has found that a condensation-curable silicone resin composition having extremely excellent adhesiveness can be obtained by blending a compound having a specific structure as an adhesion-imparting agent into the condensation-curable silicone resin mixture.
- the present invention has been completed.
- the condensation curable silicone resin composition of the present invention contains a condensation curable silicone resin mixture.
- the condensation-curable silicone resin mixture means a silicone resin that is in a liquid state before being cured and becomes a rubber elastic body by being cured while generating a reaction by-product.
- hydrolyzable groups such as alkoxysilyl groups and acetoxysilyl groups exist in the polysiloxane, and these groups are hydrolyzed to silanol groups by moisture in the air, and the silanol groups are condensed with each other. As a result, a stable siloxane bond is formed and crosslinked.
- an addition-curable silicone resin mixture hardly generates a by-product, but a platinum catalyst usually used as a crosslinking agent may cause curing inhibition when it comes into contact with a compound containing sulfur, nitrogen, or phosphorus atoms. It is necessary to strictly control the curing conditions.
- the condensation curable silicone resin mixture can be cured without strictly controlling the curing conditions.
- condensation-curable silicone resin mixture a generally known one-component type or two-component type can be used.
- the one-component type include an oxime type, an alcohol type, an acetone type, and an acetic acid type.
- an alcohol type and an acetone type that do not corrode metal are preferable.
- the two-component type include an alcohol type and an acetone type.
- tin, titanium, or an amine compound may be used as a catalyst, if necessary.
- condensation-curable silicone resin mixtures those commercially available include, for example, one-component condensed acetone type, KE-3490, KE-3493, KE-3494, KE-3497, KE-3466, KE. -3412, KE-3421, KE-3423, KE-3495 (all manufactured by Shin-Etsu Silicone), KE-4806-W, KE-4901-W, KE-4920T, KE- 4920, KE-4921-B, KE-4921-W (all manufactured by Shin-Etsu Silicone), and two-component condensed acetone type include KE-200, KE-210 (all manufactured by Shin-Etsu Silicone). .
- the condensation curable silicone resin composition of the present invention has, as an adhesion-imparting agent, between the structural unit represented by the formula (1-1) and the structural unit represented by the formula (1-2).
- a silicone compound having a structural unit represented by the formula (1-3) and / or a structural unit represented by the formula (1-4) (hereinafter also referred to as “adhesion imparting agent according to the present invention”). contains.
- the structural units represented by the formulas (1-1) and (1-2) mean the molecular ends.
- the adhesiveness imparting agent according to the present invention may be a block copolymer or a random copolymer.
- the adhesiveness imparting agent according to the present invention may be used alone or in combination of two or more.
- R 1a independently represents an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group, an aryl group, or an aralkyl group.
- “independently” means “may be the same or different”.
- Examples of the alkyl group having 1 to 18 carbon atoms represented by R 1a include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a tert-butyl group, and an n-pentyl group.
- Group, neopentyl group, tert-pentyl group, n-hexyl group, n-heptyl group, 2,2,4-trimethylpentyl group, n-octyl group, isooctyl group, n-nonyl group, n-decyl group, n- A dodecyl group etc. are mentioned. Of these, a methyl group is preferable.
- Examples of the aryl group represented by R 1a include a phenyl group, a tolyl group, a xylyl group, an ethylphenyl group, and a naphthyl group. Of these, a phenyl group is preferred.
- Examples of the aralkyl group represented by R 1a include a benzyl group, an ⁇ -phenylethyl group, a ⁇ -phenylethyl group, and the like.
- R 1a is preferably an alkyl group having 1 to 18 carbon atoms or an aryl group, and more preferably a methyl group or a phenyl group.
- R 1b independently represents an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group, an aryl group, or an aralkyl group.
- Examples of the alkyl group having 1 to 18 carbon atoms represented by R 1b include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a tert-butyl group, and an n-pentyl group.
- Group, neopentyl group, tert-pentyl group, n-hexyl group, n-heptyl group, 2,2,4-trimethylpentyl group, n-octyl group, isooctyl group, n-nonyl group, n-decyl group, n- A dodecyl group etc. are mentioned. Of these, a methyl group is preferable.
- Examples of the cycloalkyl group represented by R 1b include a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, and a methylcyclohexyl group.
- Examples of the aralkyl group represented by R 1b include a benzyl group, an ⁇ -phenylethyl group, a ⁇ -phenylethyl group, and the like.
- m is an integer of 1 to 50, preferably an integer of 2 to 45.
- n is an integer of 1 to 1500, preferably an integer of 2 to 1400.
- each R 1b in the repeating unit may be the same or different.
- each A is independently an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group, an aryl group, an aralkyl group, or the formula (2). It is a group.
- alkyl group having 1 to 18 carbon atoms, the cycloalkyl group, the aryl group, and the aralkyl group represented by A include those similar to R 1a and R 1b , respectively.
- R 2a represents an alkylene group having 1 to 8 carbon atoms in which some of the carbon atoms excluding the carbon atom bonded to the silicon atom may be substituted with an oxygen atom.
- the alkylene group having 1 to 8 carbon atoms represented by R 2a include a methylene group, an ethylene group, an n-propylene group, an n-butylene group, an n-pentylene group, an n-hexylene group, and an n-octylene. And groups in which some carbon atoms of these alkylene groups are substituted with oxygen atoms.
- each R 2b independently represents an alkylene group having 1 to 3 carbon atoms.
- Examples of the alkylene group having 1 to 3 carbon atoms represented by R 2b include a methylene group, an ethylene group, an n-propylene group, and an isopropylene group.
- x in Formula (2) is 2, two R ⁇ 2b> may be the same and may differ.
- each R 3 independently represents an alkylene group having 1 to 3 carbon atoms.
- Examples of the alkylene group having 1 to 3 carbon atoms represented by R 3 include a methylene group, an ethylene group, an n-propylene group, and an isopropylene group.
- each R 3 may be the same or different.
- x is an integer of 0-2.
- X in the formula (2) is preferably an integer of 0 or 1.
- the case where x is 0 means the case where R 2a and NH group are directly bonded.
- R 3 in the above formula (2) is independently a methylene group and R 4 is independent from the viewpoint of compatibility with the condensation curable silicone resin mixture and availability of raw materials.
- a hydrogen atom or a hydroxymethyl group is preferable.
- the minimum with a preferable functional group equivalent of the said Formula (2) of the adhesiveness imparting agent concerning this invention is 100, and a preferable upper limit is 15000.
- the functional group equivalent of the formula (2) of the adhesion-imparting agent according to the present invention is less than 100, the adhesive property corresponding to the functional group equivalent of the group represented by the formula (2) is not exhibited or condensed.
- the compatibility with the curable silicone resin mixture may be inferior.
- the functional group equivalent of the formula (2) of the adhesion-imparting agent according to the present invention exceeds 15000, the resulting condensation-curable silicone resin composition may have insufficient adhesion.
- the more preferable lower limit of the functional group equivalent of the formula (2) of the adhesiveness imparting agent according to the present invention is 200, the more preferable upper limit is 12000, the still more preferable lower limit is 500, and the still more preferable upper limit is 10,000.
- the functional group equivalent of the adhesion-imparting agent according to the present invention is defined by (molecular weight of adhesion-imparting agent) / (number of moles of carbamate groups), and depends on the ratio of m and n.
- Examples of the method for producing the adhesion-imparting agent according to the present invention include, for example, the following formula between a structural unit represented by the following formula (3-1) and a structural unit represented by the following formula (3-2).
- a silicone compound having a structural unit represented by (3-3) and / or a structural unit represented by the following formula (3-4) (hereinafter also referred to as “silicone compound having an amino group”), And a method of reacting the cyclic carbonate compound represented by 4) (hereinafter, also simply referred to as “cyclic carbonate compound”).
- R 1a independently represents an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group, an aryl group, or an aralkyl group.
- R 1b independently represents an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group, an aryl group, or an aralkyl group.
- m is an integer of 1 to 50
- n is an integer of 1 to 1500.
- each B is independently represented by an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group, an aryl group, an aralkyl group, or the following formula (5): It is a group.
- at least one B is a group represented by formula (5).
- the R 1a of the formula (3-1) and (3-2) in R 1a and formula (1-1) and formula (1-2) respectively be the same group
- the formula (3-3 ) and a R 1b of the formula (3-4) in the R 1b and formula (1-3) and formula (1-4) respectively at the same group.
- R 3 represents an alkylene group having 1 to 3 carbon atoms
- R 4 represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, an alkyl group having 1 to 3 carbon atoms having an OH group, Or, it represents a halogeno group.
- the R 3 of R 3 and the formula (2) in formula (4) respectively be the same group
- the R 4 in R 4 and equation (2) in formula (4) respectively the same group It becomes.
- Examples of a method for synthesizing the silicone compound having an amino group include dialkoxy having an alkylamino group disclosed in US Pat. No. 3,355,424, US Pat. No. 2,947,771, US Pat. No. 3,890,269, and the like.
- a method using a polycondensation reaction that leads to an alkylsilane unit being inserted into the siloxane chain can be used. This reaction is usually performed in the presence of an acidic or alkaline catalyst. This reaction can also be carried out as a polymerization reaction using dialkoxyalkylsilane and cyclic siloxane.
- cyclic carbonate compound the compound etc. which are represented by following formula (6) are mentioned, for example.
- R 3 in the formula (4) is a methylene group are preferable, and ethylene carbonate and glycerol carbonate are more preferable.
- the amount of the cyclic carbonate compound used in the reaction between the silicone compound having an amino group and the cyclic carbonate compound is 0.5 to 10 mol with respect to 1 mol of the amino group of the silicone compound having an amino group. Is preferable, and 0.8 to 5 mol is more preferable.
- the amino group here is an amino group capable of reacting with the cyclic carbonate compound, and specifically, a primary amino group and a secondary amino group.
- the reaction of the silicone compound having an amino group and the cyclic carbonate compound may be performed in the presence of a solvent.
- a solvent for example, benzene, toluene, xylene, chlorobenzene, dichlorobenzene, cyclohexane, dichloromethane, chloroform, diethyl ether, diisopropyl ether, Acetone, ethyl methyl ketone, methyl isobutyl ketone, isopropanol, butanol and the like can be mentioned.
- the minimum with preferable content of the adhesiveness imparting agent concerning this invention in the condensation-curable silicone resin composition of this invention is 0.01 mass%, and a preferable upper limit is 15 mass%.
- a preferable upper limit is 15 mass%.
- the content of the adhesiveness imparting agent according to the present invention is less than 0.01% by mass, the effect of improving the adhesiveness may not be sufficiently exhibited. If the content of the adhesion-imparting agent according to the present invention exceeds 15% by mass, the hardness of the cured product may be adversely affected.
- the more preferable lower limit of the content of the adhesiveness imparting agent according to the present invention is 0.1% by mass, the more preferable upper limit is 10% by mass, the still more preferable lower limit is 0.3% by mass, and the still more preferable upper limit is 5% by mass.
- the condensation curable silicone resin composition of the present invention may contain other adhesiveness-imparting agents in addition to the adhesion-imparting agent according to the present invention as long as the object of the present invention is not impaired. *
- the condensation curable silicone resin composition of the present invention contains additives as necessary within a range that does not impair the purpose and effect of the present invention. You may contain.
- the additive examples include an inorganic filler, an antioxidant, an inorganic phosphor, a lubricant, an ultraviolet absorber, a thermal light stabilizer, a dispersant, an antistatic agent, a polymerization inhibitor, an antifoaming agent, a curing accelerator, and a solvent.
- Anti-aging agent radical inhibitor, adhesion improver, flame retardant, surfactant, storage stability improver, ozone anti-aging agent, thickener, plasticizer, radiation blocking agent, nucleating agent, coupling agent, Examples include conductivity imparting agents, phosphorus peroxide decomposing agents, pigments, metal deactivators, and property modifiers.
- the inorganic filler is not particularly limited, and examples thereof include fine particles that do not deteriorate optical properties. Specific examples include alumina, aluminum hydroxide, fused silica, crystalline silica, ultrafine powder amorphous silica, hydrophobic ultrafine silica, talc, calcium carbonate, barium sulfate and the like.
- Examples of the inorganic phosphor include yttrium, aluminum, garnet-based YAG phosphor, ZnS phosphor, Y 2 O 2 S phosphor, red light-emitting phosphor, and blue light emission, which are widely used in LEDs. Examples thereof include phosphors and green light emitting phosphors.
- condensation curable silicone resin composition of the present invention for example, a condensation curable silicone resin mixture, an adhesiveness imparting agent according to the present invention, and an additive used as necessary are mixed. Can be manufactured by.
- the condensation-curable silicone resin composition of the present invention can be a one-component type or a two-component type.
- the condensation curable silicone resin composition of the present invention can be used after being applied to a substrate such as an optical semiconductor element and cured.
- Examples of the method for applying the condensation curable silicone resin composition of the present invention to a substrate include a method using a dispenser, a potting method, screen printing, transfer molding, injection molding, and the like.
- the condensation curable silicone resin composition of the present invention can be cured at room temperature or by heating.
- the condensation curable silicone resin cured product obtained by curing the condensation curable silicone resin composition of the present invention is also one aspect of the present invention.
- the final heating temperature when the condensation curable silicone resin composition of the present invention is cured by heating is usually 100 ° C. or higher, preferably 120 ° C. or higher, more preferably 120 to 200 ° C. Preferably, it is 120 to 180 ° C.
- the condensation curable silicone resin composition of the present invention is used for, for example, display materials, optical recording medium materials, optical equipment materials, optical component materials, optical fiber materials, optical / electronic functional organic materials, semiconductor integrated circuit peripheral materials, etc. Can be used for
- condensation curable silicone resin composition excellent in adhesiveness can be provided.
- cured material and optical semiconductor element sealing body which use this condensation curable silicone resin composition can be provided.
- the residual amino group was confirmed to be less than 1% by neutralization titration. Thereafter, the reaction solution is transferred to a 200 mL four-necked flask equipped with a stirrer, a thermometer, and a cooler, 50 g of chlorobenzene and 50 g of water are added to separate the solution, and the organic layer is concentrated to obtain a transparent liquid (adhesive). 9.3 g of property-imparting agent A) was obtained.
- the adhesion-imparting agent A is a structural unit represented by the formula (1-1) (R 1a is a methyl group, A is a methyl group), The structural unit represented by the formula (1-2) (R 1a is a methyl group, A is a methyl group), the structural unit represented by the formula (1-3) (R 1b is a methyl group, and A is a formula And a structural unit represented by the formula (1-4): R 2a is an n-propylene group, x is 0, R 3 is a methylene group, and R 4 is hydrogen. It was confirmed that R 1b had a methyl group.
- the adhesion-imparting agent B is a structural unit represented by the formula (1-1) (R 1a is a methyl group, A is a methyl group), The structural unit represented by the formula (1-2) (R 1a is a methyl group, A is a methyl group), the structural unit represented by the formula (1-3) (R 1b is a methyl group, and A is a formula And a structure represented by the above formula (1-4), wherein R 2a is an n-propylene group, x is 0, R 3 is a methylene group, and R 4 is a hydroxymethyl group. And having a unit (R 1b is a methyl group).
- reaction solution is transferred to a 200 mL four-necked flask equipped with a stirrer, a thermometer, and a cooler, 50 g of chlorobenzene and 50 g of water are added to separate the solution, and the organic layer is concentrated to obtain a transparent liquid (adhesive). 4.1 g of property-imparting agent C) was obtained.
- the adhesion-imparting agent C is a structural unit represented by the formula (1-1) (R 1a is a methyl group, A is a formula (2).
- R 2a is an n-propylene group, x is 0, R 3 is a methylene group, and R 4 is hydrogen
- the structural unit represented by the formula (1-2) (R 1a is methyl)
- R 2a is an n-propylene group, x is 0, R 3 is a methylene group, and R 4 is hydrogen
- the formula (1-4) And having a structural unit (R 1b is a methyl group, a phenyl group).
- the adhesion-imparting agent D was found to be a structural unit represented by the above formula (1-1) (R 1a is a methyl group, A is a formula (2) R 2a is an n-propylene group, x is 0, R 3 is a methylene group, and R 4 is a hydroxymethyl group), and a structural unit (R 1a Is a methyl group, A is a group represented by the formula (2), R 2a is an n-propylene group, x is 0, R 3 is a methylene group, and R 4 is a hydroxymethyl group), and the formula (1- It was confirmed that the structural unit represented by 4) (R 1b is a methyl group, a phenyl group).
- Examples 1 to 6 Comparative Examples 1 and 2
- Condensation-curable silicone resin compositions were prepared by uniformly mixing the components in the amounts shown in Table 1 and then thoroughly degassing.
- the condensation-curable silicone resin mixture in Table 1 a two-component condensation acetone type silicone resin mixture (“KE-200” manufactured by Shin-Etsu Silicone Co., Ltd.) was used.
- the adhesion-imparting agent E in Table 1 glycidoxypropyltrimethoxylane (manufactured by Dow Corning Toray, “Z-6040”) was used.
- the tensile shear bond strength was measured using a tensile tester (manufactured by Shimadzu Corporation, “AGS-X”) under the conditions of a distance between grips of 100 mm and a test speed of 5 mm / min.
- condensation curable silicone resin composition excellent in adhesiveness can be provided.
- cured material and optical semiconductor element sealing body which use this condensation curable silicone resin composition can be provided.
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Abstract
Description
また、特許文献4には、接着性を向上させるために基材へプライマー処理を行う方法が開示されている。
また、特許文献4に開示されているようなプライマー処理を行う方法は、工程数が増えるため経済的でない。
以下に本発明を詳述する。
前記縮合硬化型シリコーン樹脂混合物とは、硬化前は液状であり、反応副生成物を発生させながら硬化することでゴム弾性体となるシリコーン樹脂のことを意味する。具体的には、ポリシロキサン中に、アルコキシシリル基やアセトキシシリル基等の加水分解性基が存在し、空気中の水分でこれらの基がシラノール基に加水分解され、該シラノール基同士が縮合することで安定なシロキサン結合が形成され架橋する。
例えば、付加硬化型シリコーン樹脂混合物は、副生成物はほとんど発生しないが、架橋剤として通常用いられる白金触媒が、硫黄、窒素、リン原子を含む化合物と接触すると硬化阻害を生じることがあるため、硬化条件を厳密に管理する必要がある。一方、前記縮合硬化型シリコーン樹脂混合物は、硬化条件を厳密に管理することなく硬化させることができる。
2液型としては、アルコール型、アセトン型等が挙げられる。
なお、式(1-1)及び式(1-2)で表される構造単位は分子末端を意味する。
本発明にかかる接着性付与剤は、1種を単独で使用してもよいし、2種以上を組み合わせて使用してもよい。
なお、m及び/又はnが2以上である場合、繰り返し単位中の各R1bは、同一であってもよいし、異なっていてもよい。
前記Aで表される炭素数1~18のアルキル基、シクロアルキル基、アリール基、及び、アラルキル基としては、それぞれ前記R1aや前記R1bと同様のものが挙げられる。
前記R2aで表される炭素数1~8のアルキレン基としては、例えば、メチレン基、エチレン基、n-プロピレン基、n-ブチレン基、n-ペンチレン基、n-へキシレン基、n-オクチレン基、及び、これらのアルキレン基の一部の炭素原子が酸素原子で置換されてなる基等が挙げられる。なかでも、エチレン基、n-プロピレン基、n-ブチレン基、n-ペンチレン基、n-へキシレン基、及び、これらのアルキレン基の一部の炭素原子が酸素原子で置換されてなる基が好ましい。
前記R2bで表される炭素数1~3のアルキレン基としては、メチレン基、エチレン基、n-プロピレン基、及び、イソプロピレン基が挙げられる。
なお、式(2)中のxが2である場合、2つのR2bは、同一であってもよいし、異なっていてもよい。
前記R3で表される炭素数1~3のアルキレン基としては、メチレン基、エチレン基、n-プロピレン基、及び、イソプロピレン基が挙げられる。
なお、式(2)中のxが1以上である場合、各R3は、同一であってもよいし、異なっていてもよい。
前記R4で表される炭素数1~3のアルキル基としては、メチル基、エチル基、n-プロピル基、及び、イソプロピル基が挙げられる。
前記R4で表されるOH基を有する炭素数1~3のアルキル基としては、例えば、ヒドロキシメチル基、ヒドロキシエチル基等が挙げられる。
なお、式(2)中のxが1以上である場合、各R4は、同一であってもよいし、異なっていてもよい。
なお、xが0である場合とは、R2aとNH基とが直接結合している場合を意味する。
本発明にかかる接着性付与剤の前記式(2)の官能基当量のより好ましい下限は200、より好ましい上限は12000、更に好ましい下限は500、更に好ましい上限は10000である。
本発明にかかる接着性付与剤の官能基当量とは、(接着性付与剤の分子量)/(カルバメート基のモル数)で定義され、mとnの比率に応じたものとなる。
なお、式(3-1)及び式(3-2)中のR1aと式(1-1)及び式(1-2)中のR1aとは、それぞれ同じ基となり、式(3-3)及び式(3-4)中のR1bと式(1-3)及び式(1-4)中のR1bとは、それぞれ同じ基となる。
なお、式(4)中のR3と式(2)中のR3とは、それぞれ同じ基となり、式(4)中のR4と式(2)中のR4とは、それぞれ同じ基となる。
なお、式(5)中のR2aと式(2)中のR2aとは、それぞれ同じ基となり、式(5)中のR2bと式(2)中のR2bとは、それぞれ同じ基となる。
また、式(5)中のxが2以上である場合、各R2bは、同一であってもよいし、異なっていてもよい。
前記アミノ基を有するシリコーン化合物のアミノ基当量を測定する方法としては、例えば、過塩素酸を用いた非水中和滴定等の方法が挙げられる。
前記アミノ基を有するシリコーン化合物のアミノ基当量の値より、本発明にかかる接着性付与剤に含まれる官能基であるカルバメート基(NHCOO)基のモル数、すなわち官能基当量が計算できる。
ここでいうアミノ基は、前記環状カーボネート化合物と反応し得るアミノ基であり、詳しくは、第一級アミノ基及び第二級アミノ基である。
本発明の縮合硬化型シリコーン樹脂組成物は、例えば、光半導体素子等の基材に塗布し硬化させて使用することができる。
前記電子材料としては、例えば、リードフレーム、配線済みのテープキャリア、配線板、ガラス、シリコンウエハ等の支持部材や、光半導体素子や、半導体チップ、トランジスタ、ダイオード、サイリスタ等の能動素子や、コンデンサ、抵抗体、コイル等の受動素子等が挙げられる。なかでも、光半導体素子の封止材として好適に用いることができる。
光半導体素子が本発明の縮合硬化型シリコーン樹脂硬化物で封止されている光半導体素子封止体もまた、本発明の1つである。
(アミノ基を有するシリコーン化合物とエチレンカーボネートとの反応(接着性付与剤Aの調製))
磁気回転子、温度計及び冷却器を備え付けた50mL容の四つ口フラスコに、窒素雰囲気下で、アミノ基を有するシリコーン化合物(信越シリコーン社製、「KF-865」、アミノ基当量5000g/mol)10.0g(アミノ基2.00mmol)とエチレンカーボネート(分子量88.06)0.35g(4.00mmol)とを仕込み、120℃まで昇温させた後、マグネチックスターラーを用いて15時間撹拌した。中和滴定により残存アミノ基が1%未満であることを確認した。その後、反応液を、攪拌機、温度計及び冷却器を備え付けた200mL容の四つ口フラスコに移し、クロロベンゼン50g及び水50gを加えて分液し、有機層を濃縮することで、透明液体(接着性付与剤A)9.3gを取得した。
1H-NMRにより、接着性付与剤Aを測定した結果、接着性付与剤Aは、前記式(1-1)で表される構造単位(R1aがメチル基、Aがメチル基)と、前記式(1-2)で表される構造単位(R1aがメチル基、Aがメチル基)と、前記式(1-3)で表される構造単位(R1bがメチル基、Aが式(2)で表される基であり、R2aがn-プロピレン基、xが0、R3がメチレン基、R4が水素)と、前記式(1-4)で表される構造単位(R1bがメチル基)とを有していることを確認した。
(アミノ基を有するシリコーン化合物とグリセロールカーボネートとの反応(接着性付与剤Bの調製))
磁気回転子、温度計及び冷却器を備え付けた50mL容の四つ口フラスコに、窒素雰囲気下で、アミノ基を有するシリコーン化合物(信越シリコーン社製、「KF-865」、アミノ基当量5000g/mol)10.0g(アミノ基2.00mmol)とグリセロールカーボネート(分子量118.09)0.47g(3.95mmol)とを仕込み、120℃まで昇温させた後、マグネチックスターラーを用いて15時間撹拌した。中和滴定により残存アミノ基が1%未満であることを確認した。その後、反応液を、攪拌機、温度計及び冷却器を備え付けた200mL容の四つ口フラスコに移し、クロロベンゼン50g及び水50gを加えて分液し、有機層を濃縮することで、透明液体(接着性付与剤B)9.3gを取得した。
1H-NMRにより、接着性付与剤Bを測定した結果、接着性付与剤Bは、前記式(1-1)で表される構造単位(R1aがメチル基、Aがメチル基)と、前記式(1-2)で表される構造単位(R1aがメチル基、Aがメチル基)と、前記式(1-3)で表される構造単位(R1bがメチル基、Aが式(2)で表される基であり、R2aがn-プロピレン基、xが0、R3がメチレン基、R4がヒドロキシメチル基)と、前記式(1-4)で表される構造単位(R1bがメチル基)とを有していることを確認した。
(フェニル基及びアミノ基を有するシリコーン化合物とエチレンカーボネートとの反応(接着性付与剤Cの調製))
磁気回転子、温度計及び冷却器を備え付けた50mL容の四つ口フラスコに、窒素雰囲気下で、フェニル基及びアミノ基を有するシリコーン化合物(信越シリコーン社製、「X-22-1660B-3」、アミノ基当量2200g/mol)5.0g(アミノ基2.27mmol)とエチレンカーボネート(分子量88.06)1.0g(11.4mmol)とを仕込み、120℃まで昇温させた後、マグネチックスターラーを用いて15時間撹拌した。中和滴定により残存アミノ基が1%未満であることを確認した。その後、反応液を、攪拌機、温度計及び冷却器を備え付けた200mL容の四つ口フラスコに移し、クロロベンゼン50g及び水50gを加えて分液し、有機層を濃縮することで、透明液体(接着性付与剤C)4.1gを取得した。
1H-NMRにより、接着性付与剤Cを測定した結果、接着性付与剤Cは、前記式(1-1)で表される構造単位(R1aがメチル基、Aが式(2)で表される基であり、R2aがn-プロピレン基、xが0、R3がメチレン基、R4が水素)と、前記式(1-2)で表される構造単位(R1aがメチル基、Aが式(2)で表される基であり、R2aがn-プロピレン基、xが0、R3がメチレン基、R4が水素)と、前記式(1-4)で表される構造単位(R1bがメチル基、フェニル基)とを有していることを確認した。
(フェニル基及びアミノ基を有するシリコーン化合物とグリセロールカーボネートとの反応(接着性付与剤Dの調製))
磁気回転子、温度計及び冷却器を備え付けた50mL容の四つ口フラスコに、窒素雰囲気下で、フェニル基及びアミノ基を有するシリコーン化合物(信越シリコーン社製、「X-22-1660B-3」、アミノ基当量2200g/mol)5.0g(アミノ基2.27mmol)とグリセロールカーボネート(分子量118.09)1.3g(11.4mmol)とを仕込み、120℃まで昇温させた後、マグネチックスターラーを用いて15時間撹拌した。中和滴定により残存アミノ基が1%未満であることを確認した。その後、反応液を、攪拌機、温度計及び冷却器を備え付けた200mL容の四つ口フラスコに移し、クロロベンゼン50g及び水50gを加えて分液し、有機層を濃縮することで、透明液体(接着性付与剤D)5.7gを取得した。
1H-NMRにより、接着性付与剤Dを測定した結果、接着性付与剤Dは、前記式(1-1)で表される構造単位(R1aがメチル基、Aが式(2)で表される基であり、R2aがn-プロピレン基、xが0、R3がメチレン基、R4がヒドロキシメチル基)と、前記式(1-2)で表される構造単位(R1aがメチル基、Aが式(2)で表される基であり、R2aがn-プロピレン基、xが0、R3がメチレン基、R4がヒドロキシメチル基)と、前記式(1-4)で表される構造単位(R1bがメチル基、フェニル基)とを有していることを確認した。
表1に記載した配合量で各成分を均一に混合し、その後、充分に脱気することで縮合硬化型シリコーン樹脂組成物を調製した。
なお、表1中の縮合硬化型シリコーン樹脂混合物としては、2液縮合アセトン型シリコーン樹脂混合物(信越シリコーン社製、「KE-200」)を用いた。
また、表1中の接着性付与剤Eとしては、グリシドキシプロピルトリメトキシラン(東レ・ダウコーニング社製、「Z-6040」)を用いた。
実施例及び比較例で得られた各縮合硬化型シリコーン樹脂組成物について、以下の評価を行った。結果を表1に示した。
実施例及び比較例で得られた各縮合硬化型シリコーン樹脂組成物を樹脂製モールドに流し込み、室温で1週間静置し、縮合硬化型シリコーン樹脂組成物を硬化させた。得られた硬化物をモールドから離型し、半径20mm×厚さ6mmの硬化物とし、硬度測定用試験片とした。得られた硬度測定用試験片について、ゴム・プラスチック硬度計(古里精機製作所社製、「KR-24A」)を用いて硬度(タイプA)を測定した。
実施例及び比較例で得られた各縮合硬化型シリコーン樹脂組成物を、接着部が20×25mmの長方形になるように2枚のPPA板(サイズ2×25×100mm)の間に2mm厚になるように流し込み、室温で1週間静置し、縮合硬化型シリコーン樹脂組成物を硬化させ、引張せん断試験片とした。接着基材であるPPA板は、150℃で1時間乾燥させたものを使用した。得られた接着試験片について、引張試験機(島津製作所社製、「AGS-X」)を用いて、つかみ具間距離100mm、試験速度5mm/minの条件で、引張せん断接着強度を測定した。
Claims (5)
- 縮合硬化型シリコーン樹脂混合物と接着性付与剤とを含有する縮合硬化型シリコーン樹脂組成物であって、
前記接着性付与剤は、下記式(1-1)で表される構造単位と下記式(1-2)で表される構造単位との間に、下記式(1-3)で表される構造単位及び/又は下記式(1-4)で表される構造単位を有する化合物を含有することを特徴とする縮合硬化型シリコーン樹脂組成物。
式(1-1)及び式(1-2)中、R1aはそれぞれ独立に、炭素数1~18のアルキル基、シクロアルキル基、アリール基、又は、アラルキル基を表す。式(1-3)及び式(1-4)中、R1bはそれぞれ独立に、炭素数1~18のアルキル基、シクロアルキル基、アリール基、又は、アラルキル基を表す。式(1-3)中、mは、1~50の整数であり、式(1-4)中、nは、1~1500の整数である。式(1-1)~(1-3)中、Aはそれぞれ独立に、炭素数1~18のアルキル基、シクロアルキル基、アリール基、アラルキル基、又は、下記式(2)で表される基である。ただし、式(1-1)~(1-3)中、少なくとも1つのAは式(2)で表される基である。
式(2)中、R2aは、ケイ素原子に結合した炭素原子を除く一部の炭素原子が酸素原子で置換されていてもよい炭素数1~8のアルキレン基を表し、R2bはそれぞれ独立に、炭素数1~3のアルキレン基を表し、R3はそれぞれ独立に、炭素数1~3のアルキレン基を表し、R4はそれぞれ独立に、水素原子、炭素数1~3のアルキル基、OH基を有する炭素数1~3のアルキル基、又は、ハロゲノ基を表す。式(2)中、xは0~2の整数である。 - 式(2)において、R3がメチレン基であり、R4がそれぞれ独立に、水素原子又はヒドロキシメチル基である請求項1記載の縮合硬化型シリコーン樹脂組成物。
- 接着性付与剤の含有量が0.01~15質量%である請求項1又は2記載の縮合硬化型シリコーン樹脂組成物。
- 請求項1、2又は3記載の縮合硬化型シリコーン樹脂組成物を硬化させることによって得られる縮合硬化型シリコーン樹脂硬化物。
- 光半導体素子が請求項4記載の縮合硬化型シリコーン樹脂硬化物で封止されている光半導体素子封止体。
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- 2014-05-26 KR KR1020167003200A patent/KR102151835B1/ko not_active Expired - Fee Related
- 2014-05-26 WO PCT/JP2014/063822 patent/WO2015025577A1/ja not_active Ceased
- 2014-05-26 CN CN201480045771.0A patent/CN105555873B/zh not_active Expired - Fee Related
- 2014-05-26 EP EP14838451.4A patent/EP3037481B1/en not_active Not-in-force
- 2014-05-28 TW TW103118552A patent/TWI622622B/zh not_active IP Right Cessation
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016017344A1 (ja) * | 2014-07-30 | 2016-02-04 | 住友精化株式会社 | シリコーン樹脂組成物、シリコーン樹脂硬化物、及び、光半導体素子封止体 |
| JP2017034138A (ja) * | 2015-08-03 | 2017-02-09 | パナソニックIpマネジメント株式会社 | Ledモジュール |
| WO2023008436A1 (ja) * | 2021-07-29 | 2023-02-02 | ダイニック株式会社 | 液状吸湿剤 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2015025577A1 (ja) | 2017-03-02 |
| JP5669990B1 (ja) | 2015-02-18 |
| EP3037481A4 (en) | 2017-04-05 |
| KR20160045685A (ko) | 2016-04-27 |
| US20160194454A1 (en) | 2016-07-07 |
| TW201508032A (zh) | 2015-03-01 |
| TWI622622B (zh) | 2018-05-01 |
| KR102151835B1 (ko) | 2020-09-03 |
| EP3037481A1 (en) | 2016-06-29 |
| EP3037481B1 (en) | 2018-08-01 |
| CN105555873B (zh) | 2018-09-14 |
| CN105555873A (zh) | 2016-05-04 |
| US9963552B2 (en) | 2018-05-08 |
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