WO2011048894A1 - ケイ素含有硬化性組成物及びその硬化物 - Google Patents
ケイ素含有硬化性組成物及びその硬化物 Download PDFInfo
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- WO2011048894A1 WO2011048894A1 PCT/JP2010/065962 JP2010065962W WO2011048894A1 WO 2011048894 A1 WO2011048894 A1 WO 2011048894A1 JP 2010065962 W JP2010065962 W JP 2010065962W WO 2011048894 A1 WO2011048894 A1 WO 2011048894A1
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- 0 CO[Si](CCCN(C(N(CC1OC1)C(N1CC2OC2)=O)=O)C1=O)*[Si+](C)O[Si+](C)O[Si+]C Chemical compound CO[Si](CCCN(C(N(CC1OC1)C(N1CC2OC2)=O)=O)C1=O)*[Si+](C)O[Si+](C)O[Si+]C 0.000 description 1
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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
- C08L83/14—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 in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
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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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- 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
- C08G77/06—Preparatory processes
- C08G77/08—Preparatory processes characterised by the catalysts used
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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
- C08G77/12—Polysiloxanes containing silicon bound to hydrogen
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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
- C08G77/42—Block-or graft-polymers containing polysiloxane sequences
- C08G77/44—Block-or graft-polymers containing polysiloxane sequences containing only polysiloxane sequences
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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
- C08G77/48—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 in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
- C08G77/50—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 in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms by carbon linkages
- C08G77/52—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 in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms by carbon linkages containing aromatic rings
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions 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; Coating compositions based on derivatives of such polymers
- C09D183/04—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
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/56—Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
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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
Definitions
- the present invention relates to a silicon-containing curable composition and a cured product obtained by curing the same.
- the silicon-containing curable composition and the cured product thereof are useful for electric / electronic component materials, adhesives and the like.
- an object of the present invention is to provide a silicon-containing curable composition that is excellent in heat resistance, adhesion, colorability, and transparency, and is useful for electrical and electronic materials.
- the present inventor has focused on the structure and prepolymer of a specific silicon-containing compound, and has completed the present invention.
- the present invention can be obtained by hydrosilylation reaction of one or more cyclic siloxane compounds ( ⁇ ) represented by the following formula (1) and one or more compounds ( ⁇ ) represented by the following formula (2).
- Cyclic ring containing a prepolymer (A) containing two or more Si—H groups in one molecule and two or more carbon-carbon double bonds having reactivity with Si—H groups in one molecule A silicon-containing curable composition comprising a siloxane compound (B), a polysiloxane compound (C) different from the prepolymer (A) and the cyclic siloxane compound (B), and a hydrosilylation catalyst (D) It provides things.
- R 1 , R 2 and R 3 each independently represents an alkyl group having 1 to 6 carbon atoms or a phenyl group, and a R 1 may be the same or different. And b R 2 and b R 3 may be the same or different, a represents a number of 2 to 10, b represents a number of 0 to 8, and a + b ⁇ 2)
- n 1 or 2
- the present invention also provides the silicon-containing curable composition, wherein the cyclic siloxane compound (B) is a cyclic siloxane represented by the following formula (3).
- R 12 , R 13 and R 14 each independently represents an alkyl group having 1 to 6 carbon atoms or a phenyl group, and p R 12 s may be the same or different.
- Q R 13 and q R 14 may be the same or different from each other, p represents a number of 2 to 10, q represents a number of 0 to 8, and p + q ⁇ 2)
- the present invention also provides the silicon-containing curable composition further containing a filler. Moreover, this invention provides the said silicon-containing curable composition containing the compound which has an isocyanuric acid structure further.
- the present invention also provides a cured product obtained by curing the silicon-containing curable composition.
- the present invention is excellent in transparency, and its cured product is excellent in heat resistance, adhesion, colorability and transparency, insulating films for electrical and electronic materials, sealing materials, low dielectric constant materials, adhesive materials, heat resistance
- a silicon-containing curable composition useful for materials, transparent materials, and the like can be provided.
- the silicon-containing curable composition of the present invention comprises at least one cyclic siloxane compound ( ⁇ ) represented by formula (1) (hereinafter also referred to as ( ⁇ ) component) and a compound represented by formula (2) ( ⁇ ) (Hereinafter also referred to as component ( ⁇ )) obtained by hydrosilylation reaction, prepolymer (A) containing 2 or more Si—H groups in one molecule (hereinafter referred to as (A) Component) and a cyclic siloxane compound (B) (hereinafter also referred to as component (B)) containing two or more carbon-carbon double bonds having reactivity with Si—H groups in one molecule; A polysiloxane compound (C) (hereinafter also referred to as (C) component) different from the prepolymer (A) and the cyclic siloxane compound (B), and a hydrosilylation catalyst (D) (hereinafter also referred to as (D) component). It contains.
- ⁇ cyclic siloxane compound represented by
- the prepolymer as the component (A) is obtained by hydrosilylation reaction of one or more selected from the following ( ⁇ ) component and ( ⁇ ) component, and two or more Si—H in one molecule thereof. It has a group.
- the component ( ⁇ ) is a cyclic siloxane compound represented by the following formula (1) and containing two or more Si—H groups in one molecule.
- R 1 is preferably a methyl group from the viewpoint of industrial availability
- R 2 and R 3 are preferably a methyl group or a phenyl group.
- a is preferably 4 to 6 from the viewpoint of ease of production
- b is preferably 0 to 1 from the viewpoint of the crosslinking density of the curing reaction.
- the ratio of the methyl group to the phenyl group is preferably 4: 1 to 1: 4 in the entire substituents of R 1 to R 3 .
- R 1 , R 2 and R 3 each independently represents an alkyl group having 1 to 6 carbon atoms or a phenyl group, and a R 1 may be the same or different. And b R 2 and b R 3 may be the same or different, a represents a number of 2 to 10, b represents a number of 0 to 8, and a + b ⁇ 2)
- component ( ⁇ ) examples include 1,3,5,7-tetramethylcyclotetrasiloxane, 1,3,5,7,9-pentamethylcyclopentasiloxane, 1,3,5,7,9, Examples include 11-hexamethylcyclohexasiloxane, and 1,3,5,7-tetramethylcyclotetrasiloxane is preferable from the viewpoint of industrial availability and an appropriate number of Si-H functional groups.
- the component ( ⁇ ) may be used alone or in combination of two or more.
- the component ( ⁇ ) is a compound containing two or more carbon-carbon double bonds having reactivity with the Si—H group in one molecule, and is represented by the following formula (2).
- n 1 or 2
- the compound represented by the above formula (2) which is the component ( ⁇ ) represents divinylbenzene when n is 1, and may be any of o-divinylbenzene, m-divinylbenzene, and p-divinylbenzene. When is 2, it represents trivinylbenzene, and specific examples thereof include 1,2,3-trivinylbenzene, 1,2,4-trivinylbenzene, 1,3,5-trivinylbenzene and the like.
- the compound represented by the above formula (2) may be one in which a functional group other than a vinyl group (for example, an alkyl group such as a methyl group) is bonded to a benzene ring, or a mixture thereof.
- a functional group other than a vinyl group for example, an alkyl group such as a methyl group
- the component ( ⁇ ) one type of compound may be used alone, or two or more types of compounds may be used in combination.
- the number of carbon-carbon double bonds having reactivity with Si—H groups is determined from the viewpoint of crosslinking density. As described in the above formula (2), the number is 2 to 3 per molecule.
- the prepolymer of the component (A) can be obtained by hydrosilylation reaction of the components ( ⁇ ) and ( ⁇ ).
- the reaction ratio of the component ( ⁇ ) and the component ( ⁇ ) is not particularly limited as long as two or more Si—H groups are contained in one molecule of the prepolymer of the component (A).
- the concentration of the Si—H group contained in the prepolymer of the component (A) is preferably 0.0001 mmol / g to 100 mmol / g, more preferably 0.01 mmol / g to 20 mmol, from the viewpoint of curability and storage stability. / G is preferred.
- the weight average molecular weight of the prepolymer (A) is preferably 500 to 500,000, more preferably 1,000 to 300,000 from the viewpoint of heat resistance and handling properties.
- the weight average molecular weight of the prepolymer may be measured using GPC, and may be determined by polystyrene conversion.
- the hydrosilylation reaction between the ( ⁇ ) component and the ( ⁇ ) component may be performed using a platinum-based catalyst.
- the platinum-based catalyst may be a known catalyst containing one or more metals of platinum, palladium, and rhodium that promote the hydrosilylation reaction.
- Platinum-based catalysts used as catalysts for these hydrosilylation reactions include platinum-carbonyl vinylmethyl complexes, platinum-divinyltetramethyldisiloxane complexes, platinum-cyclovinylmethylsiloxane complexes, platinum-octylaldehyde complexes, etc.
- compounds containing palladium, rhodium, etc. which are also platinum-based metals, may be used instead of platinum, and one or more of these may be used in combination.
- those containing platinum are preferred from the viewpoint of curability, and specifically, platinum-divinyltetramethyldisiloxane complex (Karstedt catalyst) and platinum-carbonylvinylmethyl complex (Ossko catalyst) are preferred.
- a so-called Wilkinson catalyst containing the above platinum-based metal such as chlorotristriphenylphosphine rhodium (I) is also included in the platinum-based catalyst in the present invention.
- the amount of the platinum-based catalyst used is preferably 5% by mass or less, more preferably 0.0001 to 1.0% by mass of the total amount of the components ( ⁇ ) and ( ⁇ ) from the viewpoint of reactivity.
- the hydrosilylation reaction conditions for the ( ⁇ ) component and the ( ⁇ ) component are not particularly limited, and may be carried out under the conventionally known conditions using the above-mentioned catalyst.
- a conventionally known solvent such as toluene, hexane, MIBK (methyl isobutyl ketone), cyclopentanone, PGMEA (propylene glycol monomethyl ether acetate), etc. may be used during the reaction.
- the prepolymer of the component (A) is a compound containing two or more carbon-carbon double bonds having reactivity with the component ( ⁇ ), which is a cyclic siloxane compound, and a Si—H group.
- the ( ⁇ ) component constituting the component (A) is cyclic, and the ( ⁇ ) component is ( ⁇ ).
- a major feature is that a prepolymer is first used together with the components and then used as a blending component of the curable composition.
- the silicon-containing curable composition of the present invention since the component ( ⁇ ) constituting the component (A) has a cyclic structure, the curing shrinkage is small, and therefore a cured product having excellent adhesion can be obtained. Furthermore, since the silicon content can be increased while the viscosity is low, a curable composition having excellent heat resistance can be obtained.
- the component (B) is a cyclic siloxane compound containing two or more carbon-carbon double bonds having reactivity with Si—H groups in one molecule.
- the number of double bonds is preferably 2 to 10, and more preferably 2 to 6 from the viewpoint of the crosslinking density of the cured product.
- examples of the carbon-carbon double bond having reactivity with the Si—H group include a carbon-carbon double bond contained in an alkenyl group such as a vinyl group.
- a vinyl group bonded to (Si—CH ⁇ CH 2 group) is preferable.
- a cyclic siloxane compound represented by the following formula (3) may be mentioned.
- R 12 , R 13 and R 14 each independently represents an alkyl group having 1 to 6 carbon atoms or a phenyl group, and p R 12 s may be the same or different.
- Q R 13 and q R 14 may be the same or different from each other, p represents a number of 2 to 10, q represents a number of 0 to 8, and p + q ⁇ 2)
- R 12 , R 13 and R 14 are preferably a methyl group or a phenyl group from the viewpoint of industrial availability.
- p is preferably 2 to 4 from the viewpoint of crosslinking density, and
- q is preferably 1 to 3 from the viewpoint of viscosity.
- Specific examples of the preferred component (B) include cyclic siloxane compounds represented by the following formulas (4) to (6).
- the component (B) is a cyclic siloxane compound containing two or more carbon-carbon double bonds having reactivity with Si—H groups in one molecule, and the component (B) is a cyclic siloxane compound.
- the silicon-containing curable composition of the present invention is superior in heat resistance, transparency, and the like as compared to a non-siloxane compound because the component (B) is a siloxane compound, and the component (B) is a cyclic compound.
- the adhesion is superior to that of the chain compound.
- the component (B) is a cyclic siloxane compound containing two or more carbon-carbon double bonds having reactivity with Si—H groups in one molecule, and it is listed in more detail that it is particularly excellent. It becomes as follows.
- the polysiloxane compound as the component (C) will be described.
- the silicon-containing curable composition of the present invention by adding the polysiloxane compound, yellowing of the resulting cured product can be prevented, toughness can be imparted to the cured product, and the resin strength can be adjusted.
- polysiloxane compound as (C) component a well-known general thing can be used.
- a polysiloxane compound (Ca) containing an alkenyl group bonded to a silicon atom (hereinafter also referred to as a component (Ca))
- a polysiloxane containing a hydrogen atom bonded to a silicon atom (hereinafter also referred to as a (Cb) component) can be used.
- the above (Ca) component and (Cb) component are: [iii] a product obtained by hydrosilylation reaction between (Ca) component and (Cb) component, or [iv] It can also be used as a product obtained by carrying out a hydrosilylation reaction in the four-component system of the aforementioned components (A) and (B) and the aforementioned components (Ca) and (Cb).
- the product of the above [iii] and the product of the above [iv] are prepared by appropriately adjusting the reaction ratio in the hydrosilylation reaction to obtain the polysiloxane compound containing an alkenyl group bonded to a silicon atom (that is, (Ca) component) or a polysiloxane compound containing a hydrogen atom bonded to a silicon atom (that is, (Cb) component).
- the hydrosilylation reaction may be performed by a conventional method.
- the above [i] to [iv] may be used alone or in combination.
- Component (Ca) and (Cb) are preferably used in combination.
- the product of the above [iii] as the component (Ca) and the component (Cb) are used in combination, or the product of the above [iii] as the component (Cb) ( It is preferable to use in combination with the component (Ca).
- the adhesion of the silicon-containing curable composition can be improved, and the hardness of the resulting cured product can be increased.
- the ratio of the (Ca) component to the (Cb) component is such that the number of Si—H groups contained in the (Cb) component and the number of alkenyl groups contained in the (Ca) component are
- the ratio may be appropriately determined in consideration of the ratio, but the equivalent ratio of the Si—H group to the alkenyl group (the former / the latter) is preferably 0.5 to 10, particularly preferably 1.0 to 5.0. If the equivalent ratio is less than 0.5, the silicon-containing curable composition is not cured, and if it is greater than 10, there is a possibility of coloring. More preferably, the use ratio is selected so that the equivalent ratio is satisfied when the mass ratio of the component (Ca) to the component (Cb) is in the range of 3: 1 to 1: 3.
- the polysiloxane compound as the component (C) is preferably a chain polysiloxane compound unlike the component (A) and the component (B).
- the proportion of the linear structure in the entire molecular weight is preferably 80% or more, and more preferably 90% or more. Those having a ratio of 100% can also be preferably used, but those containing a cyclic structure in the range of 20% or less are also preferred.
- the cyclic structure can be introduced using, for example, the aforementioned component ( ⁇ ) or component (B).
- the aforementioned ( ⁇ ) component or (B) component having a cyclic structure may be introduced by a conventional method to the compound exemplified later as the component (Ca) or (Cb).
- the cyclic structure may be introduced so as to be located at the end of the polysiloxane compound, or may be introduced so as to be located in a portion other than the end (in the polysiloxane chain).
- the component (Ca) preferably has a weight average molecular weight of 5,000 to 50,000, more preferably 10,000 to 40,000 from the viewpoint of heat resistance and handling properties.
- the component (Cb) preferably has a weight average molecular weight of 5,000 to 200,000, more preferably 10,000 to 100,000 from the viewpoint of heat resistance and handling properties.
- the weight average molecular weight is less than 5,000, the obtained cured product becomes brittle.
- the viscosity of the silicon-containing curable composition is increased, which may cause a problem in handling properties.
- examples of the alkenyl group include a vinyl group and an allyl group. Among them, a vinyl group is preferable because it is easy to synthesize. Moreover, the alkenyl group may be bonded to the terminal or may be bonded to the side chain.
- the component (Ca) preferably has two alkenyl groups.
- the hydrogen atom may be bonded to a terminal or a side chain.
- Examples of the polysiloxane compound containing an alkenyl group bonded to a silicon atom as the component (Ca) include an alkenyl group-containing polysiloxane compound represented by the following formula (7) or (8). .
- R 15 , R 16 , R 17 , R 18 , R 19 , R 20 , R 21 and R 22 are each independently an alkyl group having 1 to 6 carbon atoms or 6 carbon atoms.
- Represents an aryl group of ⁇ 18 or an arylalkyl group of 7 to 18 carbon atoms, and a methylene chain of an alkyl group of 1 to 6 carbon atoms or a terminal methyl group, or a methylene chain in an arylalkyl group of 7 to 18 carbon atoms May be interrupted by —O—, —S—, —CO—, —COO—, —OCO— or —C ⁇ C—, and a methylene chain or terminal methyl of an alkyl group having 1 to 6 carbon atoms.
- a methylene chain in an arylalkyl group having 7 to 18 carbon atoms may be substituted with a halogen atom, an amino group or an epoxy group, and when there are a plurality of these interrupting groups or substituents, they are the same.
- x, , Z and r is a number independently 0 to 10, and 1 ⁇ x + y + z + r ⁇ 10.
- R 23 and R 32 each independently represents an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 18 carbon atoms, or an arylalkyl group having 7 to 18 carbon atoms.
- R 24 , R 25 , R 26 , R 27 , R 28 , R 29 , R 30 and R 31 are each independently an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 18 carbon atoms, An arylalkyl group having 7 to 18 carbon atoms or an alkenyl group having 2 to 6 carbon atoms, a methylene chain or a terminal methyl group of the alkyl group having 1 to 6 carbon atoms, or an arylalkyl group having 7 to 18 carbon atoms
- the methylene chain in the alkyl group may be interrupted by —O—, —S—, —CO—, —COO—, —OCO— or —C ⁇ C—, and the methylene chain
- Chain or terminal methyl group or aryl having 7 to 18 carbon atoms Methylene chain in the alkyl group may be substituted with a halogen atom, an amino group or an epoxy group, if these interrupting groups or substituents are plural, they may be different even in the same, R 24 At least one of ⁇ R 31 is an alkenyl group, s, t, u and w are each independently a number of 0 to 10, and 1 ⁇ s + t + u + w ⁇ 10.
- a commercially available polysiloxane compound containing an alkenyl group bonded to a silicon atom as the component (Ca) can also be used.
- Examples of the polysiloxane compound containing a hydrogen atom bonded to a silicon atom as the component (Cb) include a hydrogen atom-containing polysiloxane compound represented by the following formula (9) or (10). .
- R 33 , R 34 , R 35 , R 36 , R 37 , R 38 , R 39 and R 40 are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, carbon Represents an aryl group having 6 to 18 atoms or an arylalkyl group having 7 to 18 carbon atoms, in a methylene chain or terminal methyl group of an alkyl group having 1 to 6 carbon atoms or an arylalkyl group having 7 to 18 carbon atoms
- the methylene chain may be interrupted by —O—, —S—, —CO—, —COO—, —OCO— or —C ⁇ C—, and the methylene chain of an alkyl group having 1 to 6 carbon atoms
- the methylene chain in the terminal methyl group or the arylalkyl group having 7 to 18 carbon atoms may be substituted with a halogen atom, an amino group or an epoxy group, and when there are
- R 41 and R 50 each independently represents an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 18 carbon atoms, or an arylalkyl group having 7 to 18 carbon atoms.
- R 42 , R 43 , R 44 , R 45 , R 46 , R 47 , R 48 and R 49 are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or 6 to 18 carbon atoms.
- a polysiloxane compound containing a hydrogen atom bonded to a silicon atom may be a commercially available one.
- DMS-H03, DMS-H21, DMS-H25, DMS-H31 , DMS-H41 H-terminated polydimethylsiloxane, manufactured by Gelest
- HDP-111 Polyphenyl (dimethylH siloxy) siloxane H-terminated, manufactured by Gerest
- HPM-502 methyl Hsiloxane-phenylmethylsiloxane copolymer, Gelest
- HMS-991, HMS -992 polymethyl H siloxane, gel HES-992 (polyethyl H siloxane,
- the content of the component (A) and the component (B) considers the ratio of Si—H groups and carbon-carbon double bonds that are reactive with Si—H groups.
- the equivalent ratio of the Si—H group contained in the component (A) and the carbon-carbon double bond reactive with the Si—H group contained in the component (B) (the former / the latter) ) Is preferably 0.1 to 10, particularly preferably 1.0 to 5.0. If the equivalence ratio is less than 0.1, the silicon-containing curable composition is not cured, and if it is greater than 10, there is a possibility of coloring.
- the amount of component (C) is the total amount of component (A) and component (B).
- the mass ratio is preferably 0.1 to 10, particularly preferably 0.2 to 4.0.
- the hydrosilylation catalyst as the component (D) will be described.
- the component (D) hydrosilylation catalyst include platinum-based catalysts, which may be known catalysts containing one or more metals of platinum, palladium, and rhodium that promote the hydrosilylation reaction.
- Platinum-based catalysts used as hydrosilylation catalysts include platinum-based catalysts such as platinum-carbonylvinylmethyl complex, platinum-divinyltetramethyldisiloxane complex, platinum-cyclovinylmethylsiloxane complex, platinum-octylaldehyde complex, etc.
- those containing platinum are preferable from the viewpoint of curability, and specifically, platinum-divinyltetramethyldisiloxane complex (Karstedt catalyst) and platinum-carbonylvinylmethyl complex (Ossko catalyst) are preferable.
- a so-called Wilkinson catalyst containing the above platinum-based metal such as chlorotristriphenylphosphine rhodium (I) is also included in the platinum-based catalyst in the present invention.
- the content of the component (D) is preferably 5% by mass or less, more preferably 0.0001 to 1.0% by mass from the viewpoints of curability and storage stability.
- the content is more than 5% by mass, the stability of the silicon-containing curable composition tends to be poor, and when it is less than 0.0001% by mass, sufficient curability may not be obtained.
- the silicon-containing curable composition of the present invention preferably contains a filler as an optional component in addition to the components (A) to (D).
- a filler as an optional component in addition to the components (A) to (D).
- the obtained cured product can be colored in a desired color, and the hardness of the obtained cured product can be increased.
- the filler examples include colloidal silica, silica gel, minerals such as mica and montmorillonite; metal oxides such as titanium oxide, iron oxide, aluminum oxide, magnesium oxide, zinc oxide, and beryllium oxide; Ceramics such as silicon nitride, aluminum nitride, boron nitride, silicon carbide or the like modified by organic modification treatment; metal hydroxide such as aluminum hydroxide or magnesium hydroxide or organic modification treatment of these Metal carbonates such as calcium carbonate, magnesium carbonate, barium carbonate or the like modified by organic modification treatment, etc .; Pigments such as metal borate and carbon black; Carbon fiber, graphite, whisker , Kaolin, talc, glass fiber , Glass beads, the layered clay mineral, clay, potassium titanate, silicon carbide, quartz, aluminum, zinc, wood flour, pulp, cotton chips, and the like.
- metal oxides such as titanium oxide, iron oxide, aluminum oxide, magnesium oxide, zinc oxide, and beryllium oxide
- Ceramics such as silicon nitride
- the particle size of these fillers is preferably 100 ⁇ m or less, more preferably 50 ⁇ m or less from the viewpoint of heat resistance.
- the content of the filler in the silicon-containing curable composition of the present invention is preferably 90% by mass or less and more preferably 50% by mass or less from the viewpoint of heat resistance and handling.
- the content of the filler in the silicon-containing curable composition of the present invention is preferably 5% by mass or more in order to sufficiently exhibit the effect of addition.
- a compound having a cyanuric acid structure can be further added to improve close adhesion.
- the compound having a cyanuric acid structure include isocyanuric acid, triallyl cyanuric acid, 1,3,5-triglycidyl isocyanuric acid, triallyl isocyanuric acid, 1-allyl-3,5-diglycidyl isocyanuric acid, 1 , 3-diallyl-5-glycidyl isocyanuric acid, tris (2-hydroxyethyl) isocyanuric acid, tris (2,3-dihydroxypropyl) isocyanuric acid, tris (2,3-epoxypropyl) isocyanuric acid, with the chemical formula shown below Compounds represented by Japanese Patent No.
- the content of the compound in the silicon-containing curable composition of the present invention is preferably 0.01 to 10% by mass, and more preferably 0.1 to 5% by mass.
- the silicon-containing curable composition of the present invention may further contain a free radical scavenger as an optional component.
- the free radical scavenger in this case may be any antioxidant substance such as an antioxidant or a stabilizer, such as triethylene glycol-bis [3- (3-t-butyl-5-methyl-4-hydroxyphenyl). ) Propionate], dibutylhydroxytoluene (BHT), 2,6-di-t-butyl-paracresol (DBPC) and the like.
- the content of the free radical scavenger in the silicon-containing curable composition of the present invention is preferably 0.1 to 50% by mass from the viewpoints of heat resistance, electrical properties, curability, mechanical properties, storage stability and handling. 1 to 30% by mass is more preferable.
- the silicon-containing curable composition of the present invention can be cured by heating and can be a cured product.
- This curing reaction may be performed by any method, such as a method of mixing the compounding components of the silicon-containing curable composition of the present invention immediately before use, a method of mixing all in advance and curing by heating or the like when performing the curing reaction. You may go.
- the heating temperature for curing is preferably 35 to 350 ° C, more preferably 50 to 250 ° C.
- the curing time is preferably 0.01 to 10 hours, more preferably 0.05 to 6 hours.
- the silicon-containing curable composition of the present invention has good fluidity at room temperature (25 ° C.) and excellent handling properties.
- the viscosity measured with an E-type viscometer at room temperature (25 ° C.) is preferably 1 Pa ⁇ S or less, and more preferably 0.1 Pa ⁇ S or less.
- cured material which consists of a silicon-containing curable composition of this invention is excellent in especially heat resistance and adhesiveness.
- a cured product having a temperature causing a weight loss of 5% by mass of the cured product is preferably 400 ° C. or higher, more preferably 500 ° C. or higher.
- cured material with few crack generation is suitably obtained from the silicon-containing curable composition of this invention.
- the silicon-containing curable composition of the present invention has an effect of a curing reaction catalyst that is a hydrosilylation catalyst (for example, platinum-based catalyst) of the component (D), and the Si—H group of the component (A) and the component (B).
- a curing reaction catalyst that is a hydrosilylation catalyst (for example, platinum-based catalyst) of the component (D), and the Si—H group of the component (A) and the component (B).
- the curing reaction by the reaction of a carbon-carbon double bond (for example, Si—CH ⁇ CH 2 group) having reactivity with the Si—H group proceeds rapidly.
- the silicon-containing curable composition of the present invention is uniform and transparent, it has good light transmittance such as ultraviolet rays, and can be photocured by adding a photoreactive catalyst.
- a photoreactive monomer or resin may be further blended, and any one or more of each component in the silicon-containing curable composition may have a photoreactive group.
- silicon-containing curable composition of the present invention weather resistance, hardness, stain resistance, flame resistance, moisture resistance, gas barrier properties, flexibility, elongation and strength, electrical insulation, low dielectric constant properties
- a material having excellent mechanical properties such as mechanical properties, optical properties, electrical properties, and the like can be obtained.
- the silicon-containing curable composition of the present invention as an optional component other than the above-described filler and the compound having a cyanuric acid structure, other known various resins, as long as the target performance of the present invention is not impaired, Additives and the like can also be blended.
- the amount of the optional component other than the filler and the compound having a cyanuric acid structure is not particularly limited, but in order not to impair the effects of the present invention, in the silicon-containing curable composition of the present invention. It is preferable to set it as the range of 5 mass% or less.
- various organic functional groups may be bonded to any one or more of the components (A), (B), (C), and (D) to provide further functions. it can.
- a highly functional composite material in which the silicon-containing curable composition of the present invention or a cured product thereof is used as a matrix and other useful compounds are dispersed therein can also be produced.
- various resins that can be arbitrarily blended include polyimide resins, polyether resins such as polyethylene glycol and polypropylene glycol, polyurethane resins, epoxy resins, phenol resins, polyester resins, melamine resins, polyamide resins, polyphenylene sulfide resins, and the like.
- additives that can be optionally added include ultraviolet absorbers, antistatic agents, and antioxidants.
- the silicon-containing curable composition of the present invention is excellent in transparency, and further, the cured product is used as a curable composition excellent in various physical properties such as heat resistance, light resistance, adhesion, transparency, and colorability. be able to.
- the silicon-containing curable composition and cured product of the present invention are used for sealing materials such as display materials, optical materials, recording materials, semiconductors, and solar cells in the electric and electronic materials field; high-voltage insulating materials; -It can be used as various materials for moisture prevention purposes.
- film forming methods such as spin casting, potting, dipping, etc. can be appropriately applied.
- Applications include prototype molds for plastic parts, coating materials, interlayer insulating films, prepregs, insulating packings, heat-shrinkable rubber tubes, O-rings, sealants and protective materials for display devices, optical waveguides, optical fiber protective materials , Optical lenses, adhesives for optical equipment, high heat resistant adhesives, elastic adhesives, adhesives, die bonding agents, high heat dissipation materials, high heat resistant sealing materials, solar cell / fuel cell members, solid electrolytes for batteries, It can also be applied to insulation coating materials, photosensitive drums for copying machines, and gas separation membranes. It can also be applied to concrete protective materials, linings, soil injecting agents, sealing agents, regenerator materials, glass coatings, foams, paints, etc.
- sealing materials in the civil engineering and building materials fields, and in the medical materials field, tubes, It can be applied to sealing materials, coating materials, sealing materials for sterilization equipment, contact lenses, oxygen-enriched membranes, etc. It can be applied to other films, gaskets, casting materials, various molding materials, sealants for rust prevention and waterproofing of glass with a mesh, automobile parts, various machine parts, and the like.
- the cyclic siloxane compound as component (B) represented by the above formula (5) 1 was obtained.
- the cyclic siloxane compound 1 contains 85% or more of the molecular weight of 395 by area ratio.
- the cyclic siloxane compound 1 has 3200 to 3600 cm ⁇ 1. The absorption of the hydroxyl group belonging to the absorption region was not observed.
- a molar ratio of vinyl group to phenyl group was found to be 3.3: 1.0.
- the upper layer is purified by distillation under reduced pressure with a vacuum pump at 135 to 150 ° C., and the cyclic siloxane compound as component (B) represented by the above formula (6) 2 was obtained.
- the cyclic siloxane compound 2 contains 3200 to 3600 cm ⁇ . Absorption of hydroxyl group belonging to 1 absorption region was not observed.
- a molar ratio of vinyl group to phenyl group was found to be 1.2: 1.0.
- the cyclic siloxane compound 4 has absorption of hydroxyl groups belonging to the absorption region of 3200 to 3600 cm ⁇ 1. I could't see it.
- the vinyl group content was 11.6 mmol / g from 1 H-NMR.
- the solvent was distilled off at 60 ° C.
- the solvent was washed with 100 parts of acetonitrile, and then the solvent was distilled off at 60 ° C. to obtain a polysiloxane compound 2b.
- Step 2 Synthesis of Polysiloxane Compound 2a 100 parts of the polysiloxane compound 2b obtained in Step 1 is dissolved in 200 parts of toluene, and 0.003 part of a platinum catalyst and 1,3 which is a cyclic polysiloxane compound having an unsaturated bond , 5,7-tetramethyl-1,3,5,7-tetravinylcyclotetrasiloxane was added, and the mixture was reacted at 105 ° C. for 2 hours. The solvent was distilled off under reduced pressure at 70 ° C. and then washed with 100 parts of acetonitrile. Thereafter, the solvent was distilled off at 70 ° C.
- the polysiloxane compound 2a and the polysiloxane compound 2b were used by simultaneously blending in a silicon-containing curable composition described later.
- Silicon-containing curable composition 1 100 parts of prepolymer 1 which is component (A) obtained in Synthesis Example 1, 45 parts of cyclic siloxane compound 1 which is component (B) obtained in Synthesis Example 3, and component (C) obtained in Synthesis Example 7 240 parts of polysiloxane compound 1a, 100 parts of polysiloxane compound 1b, and 0.0001 part of platinum-carbonylvinylmethyl complex as component (D) are blended to obtain silicon-containing curable composition 1 of the present invention. It was. The obtained silicon-containing curable composition 1 was cured by the following curing method to obtain a cured product. During the curing, there was no smoking, and a colorless transparent tough cured product was obtained.
- ⁇ Curing method> 1 Curing method in preparation of test piece to be used for curable confirmation and heat resistance test The curable composition was poured uniformly into a 1 mm thick Teflon (registered trademark) resin mold and adjusted to 100 ° C in an oven. After preheating for 30 minutes, it was further heated in an oven adjusted to 150 ° C. for 1 hour to obtain a cured product. 2) Curing method in preparing specimens to be used for transparency test and whiteness measurement test A 1 mm thick silicone sheet is sandwiched as a spacer between glass plates coated with a release agent, and after the defoaming treatment, the curable composition is placed. Heating at 150 ° C. for 90 minutes gave a 1 mm thick smooth cured product.
- Teflon registered trademark
- Silicon-containing curable composition 2 100 parts of prepolymer 1 as component (A) obtained in Synthesis Example 1, 30 parts of cyclic siloxane compound 1 as component (B) obtained in Synthesis Example 3, and component (C) obtained in Synthesis Example 8 90 parts of polysiloxane compound 2a, 40 parts of polysiloxane compound 2b, and 0.0001 part of platinum-carbonylvinylmethyl complex as component (D) are blended to obtain silicon-containing curable composition 2 of the present invention. It was. The obtained silicon-containing curable composition 2 was cured by the same curing method as in Example 1 to obtain a cured product. There was no smoke during curing, and a colorless and transparent hard cured product was obtained.
- Example 3 Silicon-containing curable composition 3 100 parts of prepolymer 2 as component (A) obtained in Synthesis Example 2, 40 parts of cyclic siloxane compound 1 as component (B) obtained in Synthesis Example 3, and PDV-1631 (vinyl terminal) as component (C) 40 parts of diphenylsiloxane-dimethylsiloxane copolymer (manufactured by Gerest, hereinafter also referred to as polysiloxane compound 3a) and 20 parts of HPM-502 (methyl Hsiloxane-phenylmethylsiloxane copolymer, manufactured by Gerest, hereinafter also referred to as polysiloxane compound 3b) Part (D) was mixed with 0.0001 part of a platinum-carbonylvinylmethyl complex as component (D) and 200 parts of spherical nanosilica as component (E) to obtain silicon-containing curable composition 3 of the present invention. The obtained silicon-containing curable composition 3 was cured by the same curing method as in
- Silicon-containing curable composition 4 100 parts of prepolymer 2 as component (A) obtained in Synthesis Example 2, 60 parts of cyclic siloxane compound 2 as component (B) obtained in Synthesis Example 4, and 110 parts of polysiloxane compound 3a as component (C) 50 parts of polysiloxane compound 3b, 0.0001 part of platinum-carbonylvinylmethyl complex as component (D), 300 parts of silica as component (E), and 50 parts of alumina are blended, and the silicon-containing curing of the present invention Sex composition 4 was obtained.
- the obtained silicon-containing curable composition 4 was cured by the same curing method as in Example 1 to obtain a cured product. During the curing, there was no smoke and a white hard cured product was obtained.
- Example 5 Silicon-containing curable composition 5 100 parts of prepolymer 1 as component (A) obtained in Synthesis Example 1, 50 parts of cyclic siloxane compound 3 as component (B) obtained in Synthesis Example 5, and component (C) obtained in Synthesis Example 7 100 parts polysiloxane compound 1a, 50 parts polysiloxane compound 1b, 0.0001 part platinum-carbonylvinylmethyl complex as component (D), 100 parts titanium oxide as component (E), 100 parts silica, silicone modified
- the silicon-containing curable composition 5 of the present invention was obtained by blending 5 parts of isocyanurate.
- the obtained silicon-containing curable composition 5 was cured by the same curing method as in Example 1 to obtain a cured product. During the curing, there was no smoke and a white hard cured product was obtained.
- Silicon-containing curable composition 6 100 parts of prepolymer 2 as component (A) obtained in Synthesis Example 2, 30 parts of cyclic siloxane compound 4 as component (B) obtained in Synthesis Example 6, and component (C) obtained in Synthesis Example 7 120 parts polysiloxane compound 1a, 55 parts polysiloxane compound 1b, 0.0001 part platinum-carbonylvinylmethyl complex as component (D), 10 parts carbon black as component (E), 200 parts silica, glass fiber 10 parts and 3 parts of triallyl isocyanurate were blended to obtain a silicon-containing curable composition 6 of the present invention.
- the obtained silicon-containing curable composition 6 was cured by the same curing method as in Example 1 to obtain a cured product. There was no smoke during curing, and a black hardened product was obtained.
- Silicon-containing curable composition 7 100 parts of prepolymer 2 as component (A) obtained in Synthesis Example 2, 60 parts of cyclic siloxane compound 2 as component (B) obtained in Synthesis Example 4, and 130 parts of polysiloxane compound 3a as component (C) 30 parts of polysiloxane compound 3b and 0.0001 part of platinum-carbonylvinylmethyl complex as component (D) were blended to obtain silicon-containing curable composition 7 of the present invention.
- the obtained silicon-containing curable composition 7 was cured by the same curing method as in Example 1 to obtain a cured product. There was no smoke during curing, and a colorless and transparent hard cured product was obtained.
- Silicon-containing curable composition 8 100 parts of prepolymer 1 as component (A) obtained in Synthesis Example 1, 50 parts of cyclic siloxane compound 3 as component (B) obtained in Synthesis Example 5, and component (C) obtained in Synthesis Example 7 50 parts of a certain polysiloxane compound 1a, 100 parts of polysiloxane compound 1b, 0.0001 part of platinum-carbonylvinylmethyl complex as component (D), and 5 parts of silicone-modified isocyanurate are blended to form the silicon-containing composition of the present invention.
- a curable composition 8 was obtained.
- the obtained silicon-containing curable composition 8 was cured by the same curing method as in Example 1 to obtain a cured product. There was no smoke during curing, and a colorless and transparent hard cured product was obtained.
- Silicon-containing curable composition 9 100 parts of prepolymer 2 as component (A) obtained in Synthesis Example 2, 30 parts of cyclic siloxane compound 4 as component (B) obtained in Synthesis Example 6, and component (C) obtained in Synthesis Example 7 95 parts polysiloxane compound 1a, 80 parts polysiloxane compound 1b, 0.0001 part platinum-carbonylvinylmethyl complex as component (D), 50 parts aluminum oxide as component (E), 50 parts calcium carbonate, kaolin 10 Part and 3 parts of triallyl isocyanurate were blended to obtain a silicon-containing curable composition 9 of the present invention.
- the obtained silicon-containing curable composition 9 was cured by the same curing method as in Example 1 to obtain a cured product. There was no smoke during curing, and a colorless and transparent hard cured product was obtained.
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Abstract
Description
また近年、電子情報分野では、技術の発展に伴い、使用される各種材料にも高度の性能が要求されることから、ケイ素の特長ある性質を生かして耐熱性、透明性、物理的・電気的特性に優れた材料が検討されてきている。その中で、ケイ素化合物のヒドロシリル化反応を応用して有用な化合物を製造する技術が多種、検討されている。また、電子情報分野での部材製造工程では、リソグラフィ工程が多用され、高い耐塩基性・耐溶剤性が要求されるようになってきている。そのため、高い耐塩基性・耐溶剤性を保持しつつ、高度の耐熱性、耐クラック性、透明性を同時に満足する材料が求められるようになってきている。これらの要求に対し、種々のケイ素含有硬化性組成物が提案されている(例えば特許文献1~4参照)。
また、硬化物の物性の点から特に好ましい(B)成分としては、下記の式(3)で示される環状シロキサン化合物が挙げられる。
上記(B)成分がSi-H基との反応性を有する炭素-炭素二重結合を1分子中に2個以上含有する環状シロキサン化合物であることで、特に優れていることをさらに詳しく列挙すると、以下のようになる。
(2)Si濃度を高くすることができ、耐熱性を向上させ易い。
(3)Si化合物の本来有している透明性、耐熱性等の特長はそのまま発現する。
上記の(C-a)成分及び(C-b)成分は、[iii](C-a)成分と(C-b)成分とでヒドロシリル化反応を行い得られた生成物、又は[iv]前述の(A)成分及び(B)成分並びに上記の(C-a)成分及び(C-b)成分の四成分系でヒドロシリル化反応を行い得られた生成物、としてから用いることもできる。上記[iii]の生成物及び上記[iv]の生成物は、それを得るためのヒドロシリル化反応における反応比率を適宜調整することにより、ケイ素原子に結合したアルケニル基を含有するポリシロキサン化合物(即ち(C-a)成分)、又はケイ素原子に結合した水素原子を含有するポリシロキサン化合物(即ち(C-b)成分)として得ることができる。尚、上記ヒドロシリル化反応は常法により行えばよい。
また、上記[i]~[iv]は、単独で用いてもよく組み合わせて用いてもよい。
また、上記(C-b)成分は、重量平均分子量が5000~200000が好ましく、耐熱性及びハンドリング性の点から、10000~100000がより好ましい。重量平均分子量が5000より小さいと、得られた硬化物がもろくなり、200000より大きいとケイ素含有硬化性組成物の粘度が高くなりハンドリング性に問題が生じる可能性がある。
また、上記(C-b)成分であるケイ素原子に結合した水素原子を有するポリシロキサン化合物において、水素原子は末端に結合していても側鎖に結合していてもよい。
また、(C)成分の量((C-a)成分及び(C-b)成分を組み合わせて用いる場合は両者の合計量)は、(A)成分と(B)成分の合計量に対して質量比で0.1~10が好ましく、0.2~4.0が特に好ましい。
(D)成分のヒドロシリル化触媒としては、白金系触媒が挙げられ、これはヒドロシリル化反応を促進する白金、パラジウム及びロジウムの一種以上の金属を含有する公知の触媒であればよい。ヒドロシリル化触媒として用いられる白金系触媒としては、白金-カルボニルビニルメチル錯体、白金-ジビニルテトラメチルジシロキサン錯体、白金-シクロビニルメチルシロキサン錯体、白金-オクチルアルデヒド錯体等の白金系触媒をはじめ、白金の代わりに同じく白金系金属であるパラジウム、ロジウム等を含有する化合物が挙げられ、これらの1種を用いてもよく又は2種以上を併用してもよい。特に硬化性の点から、白金を含有するものが好ましく、具体的には、白金-ジビニルテトラメチルジシロキサン錯体(Karstedt触媒)、白金-カルボニルビニルメチル錯体(Ossko 触媒)が好ましい。また、クロロトリストリフェニルホスフィンロジウム(I)等の、上記白金系の金属を含有するいわゆるWilkinson触媒も、本発明では白金系触媒に含まれる。
本発明のケイ素含有硬化性組成物は、加熱することにより硬化させることができ、硬化物とすることができる。この硬化反応は、本発明のケイ素含有硬化性組成物の配合成分を使用直前に混合する方法、あらかじめ全部を混合しておき硬化反応を行うときに加熱等により硬化する方法等、いずれの方法で行ってもよい。
硬化させる場合の加熱温度は35~350℃が好ましく、50~250℃がより好ましい。硬化時間は0.01~10時間が好ましく、0.05~6時間がより好ましい。これらの硬化反応条件下に硬化反応を行うことにより、本発明のケイ素含有硬化性組成物から、耐熱性、耐久性、密着性等に優れた性能を有する硬化物を得ることができる。
また、本発明のケイ素含有硬化性組成物からなる硬化物は、特に耐熱性、密着性に優れている。耐熱性については、詳しくは、硬化物の5質量%の重量減少を来たす温度が400℃以上、より好ましくは500℃以上の硬化物が好適に得られる。また、本発明のケイ素含有硬化性組成物からは、クラック発生の少ない硬化物が好適に得られる。
任意に配合できる各種樹脂の例としては、ポリイミド樹脂、ポリエチレングリコールやポリプロピレングリコール等のポリエーテル樹脂、ポリウレタン樹脂、エポキシ樹脂、フェノール樹脂、ポリエステル樹脂、メラミン樹脂、ポリアミド樹脂、ポリフェニレンスルフィド樹脂等が挙げられる。任意に配合できる添加剤の例としては、紫外線吸収剤、帯電防止剤、酸化防止剤等が挙げられる。
1,3,5,7-テトラメチルシクロテトラシロキサン100部、ジビニルベンゼン100部、トルエン60部及び白金-カルボニルビニルメチル錯体(Ossko触媒)0.0005部を加えて撹拌しながら、5時間還流した。反応液から70℃で溶媒を減圧留去し、(A)成分であるプレポリマー1を得た。
GPCによる分析の結果、プレポリマー1の分子量はMw=10,000であり、ヒドロシリル基(Si-H基)の含有量は 1H-NMRから5.3mmol/gであった。
1,3,5,7-テトラメチルシクロテトラシロキサン100部、ジビニルベンゼン50部、1-メトキシ-2-プロパノールアセテート70部及び白金-カルボニルビニルメチル錯体(Ossko触媒)0.0001部を加えて撹拌しながら、6時間還流した。反応液から50℃で溶媒を減圧留去し、(A)成分であるプレポリマー2を得た。
GPCによる分析の結果、プレポリマー2の分子量はMw=140000であり、ヒドロシリル基(Si-H基)の含有量は 1H-NMRから5.2mmol/gであった。
1,4-ジオキサン300部及び塩酸300部を加えて撹拌した混合液中に、メチルビニルジクロロシラン210部とフェニルメチルジクロロシラン90部の混合物を滴下した。加水分解反応により発生した塩酸を回収しつつ室温下で30分間反応させた後、70℃で3時間反応させた。反応後、2層に分離した液層の内、上層について真空ポンプによる減圧下120~140℃の条件で蒸留精製し、上記の式(5)で示される、(B)成分である環状シロキサン化合物1を得た。
GC-MSによる分析の結果、環状シロキサン化合物1には分子量=395のものが面積比で85%以上含まれており、FT-IRによる分析の結果、環状シロキサン化合物1には3200~3600cm-1の吸収域に帰属する水酸基の吸収が見られなかった。また、1H-NMRによる分析の結果、ビニル基とフェニル基のモル比が3.3:1.0の割合で認められた。
1,4-ジオキサン300部及び塩酸300部を加えて撹拌した混合液中に、メチルビニルジクロロシラン140部とフェニルメチルジクロロシラン180部の混合物を滴下した。加水分解反応により発生した塩酸を回収しつつ室温下で30分間反応させた後、70℃で3時間反応させた。反応後、2層に分離した液層の内、上層について真空ポンプによる減圧下135~150℃の条件で蒸留精製し、上記の式(6)で示される、(B)成分である環状シロキサン化合物2を得た。
GC-MSによる分析の結果、環状シロキサン化合物2には分子量Mw=445のものが面積比で85%以上含まれており、FT-IRによる分析の結果、環状シロキサン化合物2には3200~3600cm-1の吸収域に帰属する水酸基の吸収が見られなかった。また、1H-NMRによる分析の結果、ビニル基とフェニル基のモル比が1.2:1.0の割合で認められた。
合成例3で得られた環状シロキサン化合物1を50部と、合成例4で得られた環状シロキサン化合物2の50部を混合し、(B)成分である環状シロキサン化合物3を得た。
1,4-ジオキサン300部及び塩酸300部を加えて撹拌した混合液中に、メチルビニルジクロロシラン280部を滴下した。加水分解反応により発生した塩酸を回収しつつ室温下で30分間反応させた後、70℃で3時間反応させた。反応後、2層に分離した液層の内、上層について真空ポンプによる減圧下120℃以下の条件で蒸留精製し、上記の式(4)で示される、(B)成分である環状シロキサン化合物4を得た。
GC-MSによる分析の結果、環状シロキサン化合物4の分子量はMw=345であり、FT-IRによる分析の結果、環状シロキサン化合物4には3200~3600cm-1の吸収域に帰属する水酸基の吸収が見られなかった。また、ビニル基の含有量は1H-NMRから11.6mmol/gであった。
<ステップ1>ポリシロキサン化合物1aの合成
ジクロロジメチルシラン100部を、100部のイオン交換水、50部のトルエン及び450部の48%水酸化ナトリウム水溶液の混合物中に滴下し、105℃で5時間重合させた。得られた反応溶液を500部のイオン交換水で水洗した後に、このトルエン溶液を脱水し、ピリジンを20部加え、これにさらにジメチルビニルクロロシラン20部を加えて70℃で30分間撹拌した。その後、100部のイオン交換水で水洗した後、150℃で溶媒を減圧留去した。次に100部のアセトニトリルで洗浄し、70℃で溶媒を留去し、ポリシロキサン化合物1aを得た。GPC(カラム:東ソー株式会社製TSK-GEL MULTIPORE HXL M、7.8mmX300mm、展開溶媒:テトラヒドロフラン)による分析の結果、ポリシロキサン化合物1aの分子量はMw=20,000であった。
ステップ1で得られたポリシロキサン化合物1a100部をトルエン200部に溶かし、白金触媒0.003部、及び環状ポリシロキサン化合物である1,3,5,7-テトラメチルシクロテトラシロキサン10部を加え、105℃で2時間反応させた。70℃で溶媒を減圧留去した後にアセトニトリル100部で洗浄した。その後、70℃で溶媒を留去し、ポリシロキサン化合物1bを得た。GPCによる分析の結果、ポリシロキサン化合物1bの分子量は、Mw=22,000であった。
尚、ポリシロキサン化合物1a及びポリシロキサン化合物1bは、後述のケイ素含有硬化性組成物に同時に配合して用いた。
<ステップ1>ポリシロキサン化合物2bの合成
ジクロロジメチルシラン100部を、100部のイオン交換水、50部のトルエン及び450部の48%水酸化ナトリウム水溶液の混合物中に滴下し、105℃で5時間重合させた。得られた反応溶液を500部のイオン交換水で水洗した後、このトルエン溶液を脱水し、ピリジンを20部加え、これにさらにジメチルクロロシラン20部を加えて70℃で30分間撹拌した。その後、100部のイオン交換水で水洗した後、60℃で溶媒を留去した。次に100部のアセトニトリルで洗浄し、その後、60℃で溶媒を留去し、ポリシロキサン化合物2bを得た。GPCによる分析の結果、ポリシロキサン化合物2bの分子量はMw=30,000であった。
ステップ1で得られたポリシロキサン化合物2b100部をトルエン200部に溶かし、白金触媒0.003部、及び不飽和結合を有する環状ポリシロキサン化合物である1,3,5,7-テトラメチル-1,3,5,7-テトラビニルシクロテトラシロキサン10部を加え、105℃で2時間反応させた。70℃で溶媒を減圧留去した後にアセトニトリル100部で洗浄した。その後、70℃で溶媒を留去し、ポリシロキサン化合物2aを得た。GPCによる分析の結果、ポリシロキサン化合物2aの分子量はMw=35,000であった。
尚、ポリシロキサン化合物2a及びポリシロキサン化合物2bは、後述のケイ素含有硬化性組成物に同時に配合して用いた。
合成例1で得た(A)成分であるプレポリマー1の100部、合成例3で得た(B)成分である環状シロキサン化合物1を45部、合成例7で得た(C)成分であるポリシロキサン化合物1aを240部、ポリシロキサン化合物1bを100部、及び(D)成分として白金-カルボニルビニルメチル錯体0.0001部を配合して、本発明のケイ素含有硬化性組成物1を得た。
得られたケイ素含有硬化性組成物1を下記の硬化方法で硬化して硬化物を得た。硬化中は発煙もなく、無色透明の靱性のある硬化物が得られた。
1)硬化性確認及び耐熱性試験に供試する試験片作成における硬化方法
硬化性組成物を1mm厚のテフロン(登録商標)樹脂製の型枠に均一に流し込み、100℃に調整したオーブン中で30分間の予備加熱の後、さらに150℃に調整したオーブン中で1時間加熱して硬化物を得た。
2)透明性試験及び白色度測定試験に供試する試験片作成における硬化方法
離型剤を塗布したガラス板の間にスペーサーとして1mm厚のシリコーンシートを挟み、硬化性組成物を入れて脱泡処理後に150℃にて90分加熱して、1mm厚の平滑な硬化物を得た。
3)密着性試験に供試する試験片作成における硬化方法
各種材料(ガラス、シリコンウエハ、銅板、セラミックス、銀箔)の上にバーコーターを用いて硬化性組成物を塗布し、150℃にて90分で硬化させた。
合成例1で得た(A)成分であるプレポリマー1の100部、合成例3で得た(B)成分である環状シロキサン化合物1を30部、合成例8で得た(C)成分であるポリシロキサン化合物2aを90部、ポリシロキサン化合物2bを40部、及び(D)成分として白金-カルボニルビニルメチル錯体0.0001部を配合して、本発明のケイ素含有硬化性組成物2を得た。
得られたケイ素含有硬化性組成物2を実施例1と同様の硬化方法で硬化して硬化物を得た。硬化中は発煙もなく、無色透明の硬い硬化物が得られた。
合成例2で得た(A)成分であるプレポリマー2の100部、合成例3で得た(B)成分である環状シロキサン化合物1を40部、(C)成分としてPDV-1631(ビニル末端ジフェニルシロキサン-ジメチルシロキサンコポリマー、ゲレスト社製、以下ポリシロキサン化合物3aともいう)を40部、HPM-502(メチルHシロキサン-フェニルメチルシロキサンコポリマー、ゲレスト社製、以下ポリシロキサン化合物3bともいう)を20部、(D)成分として白金-カルボニルビニルメチル錯体0.0001部、及び(E)成分として球状ナノシリカ200部を配合して、本発明のケイ素含有硬化性組成物3を得た。
得られたケイ素含有硬化性組成物3を実施例1と同様の硬化方法で硬化して硬化物を得た。硬化中は発煙もなく、無色透明の硬い硬化物が得られた。
合成例2で得た(A)成分であるプレポリマー2の100部、合成例4で得た(B)成分である環状シロキサン化合物2を60部、(C)成分としてポリシロキサン化合物3aを110部、ポリシロキサン化合物3bを50部、(D)成分として白金-カルボニルビニルメチル錯体0.0001部、及び(E)成分としてシリカ300部、アルミナ50部を配合して、本発明のケイ素含有硬化性組成物4を得た。
得られたケイ素含有硬化性組成物4を実施例1と同様の硬化方法で硬化して硬化物を得た。硬化中は発煙もなく、白色の硬い硬化物が得られた。
合成例1で得た(A)成分であるプレポリマー1の100部、合成例5で得た(B)成分である環状シロキサン化合物3を50部、合成例7で得た(C)成分であるポリシロキサン化合物1aを100部、ポリシロキサン化合物1bを50部、(D)成分として白金-カルボニルビニルメチル錯体0.0001部、及び(E)成分として酸化チタン100部、シリカ100部、シリコーン変性イソシアヌレート5部を配合して、本発明のケイ素含有硬化性組成物5を得た。
得られたケイ素含有硬化性組成物5を実施例1と同様の硬化方法で硬化して硬化物を得た。硬化中は発煙もなく、白色の硬い硬化物が得られた。
合成例2で得た(A)成分であるプレポリマー2の100部、合成例6で得た(B)成分である環状シロキサン化合物4を30部、合成例7で得た(C)成分であるポリシロキサン化合物1aを120部、ポリシロキサン化合物1bを55部、(D)成分として白金-カルボニルビニルメチル錯体0.0001部、及び(E)成分としてカーボンブラック10部、シリカ200部、ガラス繊維10部、トリアリルイソシアヌレート3部を配合して、本発明のケイ素含有硬化性組成物6を得た。
得られたケイ素含有硬化性組成物6を実施例1と同様の硬化方法で硬化して硬化物を得た。硬化中は発煙もなく、黒色の硬い硬化物が得られた。
合成例2で得た(A)成分であるプレポリマー2の100部、合成例4で得た(B)成分である環状シロキサン化合物2を60部、(C)成分としてポリシロキサン化合物3aを130部、ポリシロキサン化合物3bを30部、及び(D)成分として白金-カルボニルビニルメチル錯体0.0001部を配合して、本発明のケイ素含有硬化性組成物7を得た。
得られたケイ素含有硬化性組成物7を実施例1と同様の硬化方法で硬化して硬化物を得た。硬化中は発煙もなく、無色透明の硬い硬化物が得られた。
合成例1で得た(A)成分であるプレポリマー1の100部、合成例5で得た(B)成分である環状シロキサン化合物3を50部、合成例7で得た(C)成分であるポリシロキサン化合物1aを50部、ポリシロキサン化合物1bを100部、(D)成分として白金-カルボニルビニルメチル錯体0.0001部、及びシリコーン変性イソシアヌレート5部を配合して、本発明のケイ素含有硬化性組成物8を得た。
得られたケイ素含有硬化性組成物8を実施例1と同様の硬化方法で硬化して硬化物を得た。硬化中は発煙もなく、無色透明の硬い硬化物が得られた。
合成例2で得た(A)成分であるプレポリマー2の100部、合成例6で得た(B)成分である環状シロキサン化合物4を30部、合成例7で得た(C)成分であるポリシロキサン化合物1aを95部、ポリシロキサン化合物1bを80部、(D)成分として白金-カルボニルビニルメチル錯体0.0001部、(E)成分として酸化アルミ50部、炭酸カルシウム50部、カオリン10部、トリアリルイソシアヌレート3部を配合して、本発明のケイ素含有硬化性組成物9を得た。
得られたケイ素含有硬化性組成物9を実施例1と同様の硬化方法で硬化して硬化物を得た。硬化中は発煙もなく、無色透明の硬い硬化物が得られた。
合成例1で得た(A)成分であるプレポリマー1の100部、合成例3で得た(B)成分である環状シロキサン化合物1を45部、及び(D)成分として白金-カルボニルビニルメチル錯体0.0001部を配合して、硬化性組成物比較品1を得た。得られた硬化性組成物比較品1を、実施例1と同様の硬化方法で硬化して硬化物比較品を得た。硬化後に、一部にクラックが認められた。
合成例2で得た(A)成分であるプレポリマー2の100部、合成例3で得た(B)成分である環状シロキサン化合物1を30部及び(D)成分として白金-カルボニルビニルメチル錯体0.0001部を配合して、硬化性組成物比較品2を得た。得られた硬化性組成物比較品2を、実施例1と同様の硬化方法で硬化して硬化物比較品を得た。硬化後に、一部にクラックが認められた。
1,3,5,7-テトラメチルシクロテトラシロキサン100部、ジビニルベンゼン20部、合成例7で得た(C)成分であるポリシロキサン化合物1aを95部、ポリシロキサン化合物1bを80部、及び白金-ジビニルテトラメチルジシロキサン錯体(Karstedt触媒)0.0005部を配合して、硬化性組成物比較品3を得た。得られた硬化性組成物比較品3を、実施例1と同様の硬化方法で硬化して硬化物比較品を得た。硬化後に、一部にクラックが認められた。
実施例1~9で得られた硬化物及び比較例1~3の硬化物比較品を試験片として、耐熱性、密着性の試験を、それぞれ以下に示す方法で行った。
実施例1~5、7~9で得られた硬化物については、透明性又は白色度の試験も行った。尚、透明性又は白色度の試験は、フィラーを含有するため透明性試験の実施ができなかったものについて、白色度試験を行うこととした。また、実施例6の硬化物は、カーボンブラックを含有するため、透明性及び白色度の試験は行わなかった。
これらの試験結果を表1に示した。
各硬化物について、熱分析装置(TG-DTA)で1%減量温度及び5%減量温度を測定した。測定に使用した機器及び測定条件は以下の通りである。
測定機器:セイコーインスツルメンツ(株)社製 SSC/5200
測定条件:温度範囲100-550 ℃、昇温速度10℃/分
表1の結果からは、実施例1~9で得られた本発明の硬化物は高い耐熱温度を有していることが分かった。それに対し、比較例1~3で得られた硬化物比較品は揮発成分が飛散したため、ビニル基とSi-H基の当量比バランスが崩れ、低い耐熱温度しか発現しなかったと推測される。
1.5cm×5.0cm大のガラス、シリコンウエハ、銅板、セラミックス及び銀箔上で硬化した各硬化物をステンレス製のへらでこすって、下記評価基準に従い密着性を評価した。
5:こすっても剥がれない
4:容易には剥がれない
3:数回こすると剥がれる
2:容易に剥離
1:密着せず
各硬化物について、紫外可視近赤外分光光度計(日本分光社製;Ubest V-550)で透過率を測定した。
各硬化物について、分光色差計(日本電色工業;SE6000)でハンター白色度を測定した(ブランクの白板 97.94)。
Claims (7)
- 下記式(1)で示される環状シロキサン化合物(α)の1種以上及び下記式(2)で表される化合物(β)の1種以上をヒドロシリル化反応して得られる、1分子中に2個以上のSi-H基を含有するプレポリマー(A)と、
Si-H基との反応性を有する炭素-炭素二重結合を1分子中に2個以上含有する環状シロキサン化合物(B)と、
上記プレポリマー(A)とも上記環状シロキサン化合物(B)とも異なるポリシロキサン化合物(C)と、
ヒドロシリル化触媒(D)を
含有することを特徴とするケイ素含有硬化性組成物。
- 上記ポリシロキサン化合物(C)が、ケイ素原子に結合したアルケニル基を含有するポリシロキサン化合物(C-a)と、ケイ素原子に結合した水素原子を含有するポリシロキサン化合物(C-b)との併用であることを特徴とする請求項1又は2記載のケイ素含有硬化性組成物。
- 上記ポリシロキサン化合物(C)が、分子量全体に占める直鎖状構造の割合が80%以上である鎖状ポリシロキサン化合物であることを特徴とする請求項1~3のいずれか一項に記載のケイ素含有硬化性組成物。
- さらにフィラーを含有することを特徴とする請求項1~4のいずれか一項に記載のケイ素含有硬化性組成物。
- さらにイソシアヌル酸構造を有する化合物を含有することを特徴とする請求項1~5のいずれか一項に記載のケイ素含有硬化性組成物。
- 請求項1~6のいずれか一項に記載のケイ素含有硬化性組成物を硬化させてなる硬化物。
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JP2013256587A (ja) * | 2012-06-12 | 2013-12-26 | Adeka Corp | 硬化性組成物 |
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WO2015012141A1 (ja) * | 2013-07-24 | 2015-01-29 | 株式会社Adeka | 硬化性樹脂組成物 |
JPWO2013021717A1 (ja) * | 2011-08-10 | 2015-03-05 | 株式会社Adeka | ケイ素含有硬化性組成物及びその硬化物 |
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KR101676385B1 (ko) | 2016-11-15 |
JP2011088982A (ja) | 2011-05-06 |
CN102471585B (zh) | 2013-10-16 |
CN102471585A (zh) | 2012-05-23 |
US20120157624A1 (en) | 2012-06-21 |
KR20120087120A (ko) | 2012-08-06 |
TW201118135A (en) | 2011-06-01 |
JP5801028B2 (ja) | 2015-10-28 |
US8658755B2 (en) | 2014-02-25 |
TWI487746B (zh) | 2015-06-11 |
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