WO2015194340A1 - 室温硬化性オルガノポリシロキサン組成物及び該室温硬化性オルガノポリシロキサン組成物の硬化物である成形物 - Google Patents
室温硬化性オルガノポリシロキサン組成物及び該室温硬化性オルガノポリシロキサン組成物の硬化物である成形物 Download PDFInfo
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- 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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- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5425—Silicon-containing compounds containing oxygen containing at least one C=C bond
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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
- C08G77/38—Polysiloxanes modified by chemical after-treatment
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- 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
- C08K5/57—Organo-tin compounds
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- 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
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- 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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- 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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- 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
- C09D183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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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
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- 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
- C09J183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
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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
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Definitions
- the present invention relates to a room temperature curable organopolysiloxane composition and an elastomeric molded product (silicone rubber cured product) obtained by curing the room temperature curable organopolysiloxane, and in particular, hydrolyzable in the molecule.
- Room temperature curable organopolysiloxane composition comprising an organosilicon compound having a silyl group and a structure in which two silicon atoms are cross-linked by a carbon-carbon double bond as a curing agent (crosslinking agent), and the room temperature curable organopolysiloxane
- the present invention relates to a molded product obtained by curing a siloxane composition.
- compositions comprising a hydroxyl-terminated polyorganosiloxane, an alkoxysilane and an organotitanium compound, a composition comprising an alkoxysilyl end-capped polyorganosiloxane, an alkoxysilane and an alkoxytitanium, and an alkoxy containing a silethylene group.
- a composition comprising a linear polyorganosiloxane blocked with a silyl end, alkoxysilane and alkoxytitanium, and further comprising a hydroxyl endblocked polyorganosiloxane or an alkoxy endblocked polyorganosiloxane and an alkoxy- ⁇ -silyl ester compound. Examples thereof include compositions (Patent Documents 1 to 4).
- compositions have a certain degree of storage stability, water resistance and moisture resistance, but have not yet fully satisfied these. Furthermore, the fast curability is still insufficient.
- organosiloxane polymers having a reactive (hydrolyzable) alkoxysilyl group at the terminal are conventionally known. Since the polymer terminal group is previously blocked with an alkoxysilyl group, this polymer is less likely to change (decrease) in curability over time and has excellent storage stability. In addition, workability (viscosity and thixotropy) can be adjusted arbitrarily, reacts with moisture in the air, forms crosslinks and elastomers, and provides excellent properties (hardness, tensile strength, elongation at break). ing.
- the dealcohol type is low in reactivity with moisture in the air, so the curability is insufficient. there were.
- a room temperature curable organopolysiloxane composition that is capable of giving a cured product that is excellent in fast curability and excellent in moisture resistance (curability after storage under moisture resistant conditions). No product that can be produced industrially advantageously has been found.
- the present invention has been made in view of the above circumstances, and provides a cured product that is particularly excellent in rapid curability, excellent in storage stability and durability, and can be advantageously produced industrially by using a more versatile material. It is an object of the present invention to provide a room temperature curable organopolysiloxane composition, particularly a dealcohol type room temperature curable organopolysiloxane composition.
- the bonding group adjacent to the alkoxysilyl group is vinylene.
- the alkoxysilyl-vinylene group represented by the following general formula (2) has been found that the hydrolyzability of the alkoxy group in the alkoxysilyl group is dramatically improved only when it is a group (ie, an ethenylene group).
- the present invention provides a room temperature curable organopolysiloxane composition containing the following components (A), (B) and (D).
- (A) Organopolysiloxane represented by the following general formula (1)
- R 1 is a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and a plurality of R 1 may be the same or different.
- N is an integer of 1 or more. .
- R 1 is a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and a plurality of R 1 may be the same or different.
- R 2 is 1 to 20 carbon atoms
- the room temperature-curable organopolysiloxane composition described in ⁇ 1> is provided.
- the present invention further includes (E) filler: (A) 0.1 to 1000 parts by mass with respect to 100 parts by mass of the component.
- a siloxane composition is provided.
- ⁇ 4> The present invention is described in any one of ⁇ 1> to ⁇ 3>, further comprising 0.1 to 30 parts by mass with respect to 100 parts by mass of (F) adhesion promoter: component (A).
- the room temperature-curable organopolysiloxane composition is provided.
- the present invention further includes (G) an organopolysiloxane represented by the following general formula (3): 0.1 to 100 parts by mass with respect to 100 parts by mass of the component (A) Wherein R 1 is a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and a plurality of R 1 may be the same or different. M is an integer of 1 to 2000 .)
- the room temperature-curable organopolysiloxane composition according to any one of ⁇ 1> to ⁇ 4>, which contains
- this invention provides the sealing agent, coating agent, or adhesive agent containing the room temperature curable organopolysiloxane composition as described in ⁇ 1>.
- the present invention provides a molded article comprising a cured product of the room temperature-curable organopolysiloxane composition according to ⁇ 1>.
- the room temperature-curable organopolysiloxane composition of the present invention is particularly excellent in rapid curing in air at room temperature. Further, for example, even after storage for 6 months, it rapidly cures when exposed to air and has excellent physical properties. Indicates. Therefore, the room temperature curable organopolosiloxane composition of the present invention is useful as a sealant, coating agent, and adhesive where heat resistance, water resistance and moisture resistance are required, and in particular, has steam resistance and water resistance. It can be effectively used as a necessary architectural application and adhesive application for electrical and electronic applications.
- a silicon compound containing two alkoxysilyl-vinylene groups (alkoxysilyl-ethenylene groups) represented by the above general formula (2) on the same silicon atom as the curing agent component (B), it is particularly fast.
- a cured product having excellent curability and simultaneously good storage stability and durability can be provided.
- a general-purpose chlorosilane such as diorganodichlorosilane
- the room temperature curable organopolysiloxane composition of the present invention can be advantageously produced industrially.
- the component (A) is a linear organopolysiloxane blocked by a hydroxyl group (namely, silanol group or diorganohydroxysiloxy group) represented by the following general formula (1) where both ends of the molecular chain are bonded to silicon atoms. And acts as the main agent (base polymer) in the composition of the present invention.
- a hydroxyl group namely, silanol group or diorganohydroxysiloxy group
- R 1 is a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and a plurality of R 1 may be the same or different.
- N is an integer of 1 or more.
- the substituted or unsubstituted monovalent hydrocarbon group for R 1 has 1 to 20 carbon atoms, preferably 1 to 10 carbon atoms, more preferably about 1 to 8 carbon atoms, and the same or different Specifically, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, tert-butyl group, pentyl group, neopentyl group, hexyl group, heptyl group, octyl group Group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group,
- An aryl group such as a phenyl group, a tolyl group, a xylyl group, an ⁇ -, ⁇ -naphthyl group; an aralkyl group such as a benzyl group, a 2-phenylethyl group, a 3-phenylpropyl group; and the hydrogen of these groups Groups in which some or all of the atoms are substituted with halogen atoms such as F, Cl, Br or cyano groups, such as 3-chloropropyl group, 3,3,3-trifluoropropyl group, 2-cyanoethyl group Etc.
- halogen atoms such as F, Cl, Br or cyano groups
- a methyl group, an ethyl group, and a phenyl group are preferable, and a methyl group and a
- the organopolysiloxane of component (A) preferably has a viscosity at 25 ° C. of 10 to 1,000,000 mPa ⁇ s, more preferably 50 to 500,000 mPa ⁇ s, particularly preferably 100 to 100,000 mPa ⁇ s. ⁇ S, more preferably 500 to 80,000 mPa ⁇ s. If the organopolysiloxane has a viscosity of 10 mPa ⁇ s or more, it is easy to obtain a coating film excellent in physical and mechanical strength. If the viscosity is 1,000,000 mPa ⁇ s or less, the composition of This is preferable because the viscosity does not become too high and the workability during use is good.
- the viscosity is a numerical value obtained by a rotational viscometer (for example, BL type, BH type, BS type, cone plate type, etc.).
- a rotational viscometer for example, BL type, BH type, BS type, cone plate type, etc.
- the value of n in the general formula (1) is Usually, it is desirable to be about 10 to 2,000, preferably about 30 to 1,500, more preferably about 50 to 1,200, and still more preferably about 100 to 1,000.
- the degree of polymerization is obtained, for example, as the number average degree of polymerization (or number average molecular weight) in terms of polystyrene in gel permeation chromatography (GPC) analysis using toluene or the like as a developing solvent.
- the organopolysiloxane of component (A) can be used alone or in combination of two or more.
- the (A) component organopolysiloxane is preferably contained in the room temperature-curable organopolysiloxane composition of the present invention in an amount of 99 to 20% by mass, particularly 95 to 50% by mass.
- R 1 is a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and a plurality of R 1 may be the same or different.
- R 2 has 1 to 20 carbon atoms.
- An unsubstituted or substituted alkyl group or an unsubstituted or substituted cycloalkyl group having 3 to 20 carbon atoms, a is an integer of 1 to 3)
- the substituted or unsubstituted monovalent hydrocarbon group for R 1 has 1 to 20 carbon atoms, preferably 1 to 10 carbon atoms, more preferably about 1 to 8 carbon atoms. May be the same or different, specifically, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, tert-butyl group, pentyl group, neopentyl group, hexyl group, heptyl Group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, eicosyl group and the like alkyl groups; cycl
- the unsubstituted or substituted alkyl group for R 2 has 1 to 20 carbon atoms, preferably 1 to 6 carbon atoms, more preferably about 1 to 4 carbon atoms. Specific examples include a methyl group, an ethyl group, and an n-propyl group.
- the unsubstituted or substituted cycloalkyl group has 3 to 20, preferably 4 to 8, more preferably about 5 to 6 carbon atoms, and examples thereof include a cyclopentyl group and a cyclohexyl group.
- some or all of the hydrogen atoms of these alkyl groups and cycloalkyl groups may be substituted with halogen atoms such as F, Cl, Br, cyano groups, and the like.
- halogen-substituted alkyl groups such as propyl group and 3,3,3-trifluoropropyl group, and 2-cyanoethyl group.
- the R 2 Among these, from the viewpoint of hydrolysis resistance, a methyl group, an ethyl group are preferable, methyl group is particularly preferred.
- the hydrolyzable organosilicon compound represented by the general formula (2) of the component (B) is mainly used as a curing agent (crosslinking agent).
- each a is independently an integer of 1 to 3, but 2 or 3 is preferable from the viewpoint of curability.
- a molecule having three alkoxy groups such as a methoxy group on the same silicon atom (that is, a total of six in the molecule) has two trifunctional alkoxysilane sites in one molecule.
- a synthesis example of the component (B) is shown below.
- the silicon-containing compound having two alkoxysilyl-vinylene groups (alkoxysilyl-ethenylene groups) on the same silicon atom includes, for example, a silane having two ethynyl groups on the same silicon atom, and two alkoxy Hydrosilane can be easily produced by addition reaction by hydrosilylation reaction.
- This reaction formula is represented, for example, by the following reaction formula [1].
- the addition reaction catalyst used when adding alkoxyhydrosilane includes platinum group metal catalysts such as platinum, palladium, rhodium, and ruthenium, with platinum being particularly preferred.
- platinum group metal catalysts such as platinum, palladium, rhodium, and ruthenium
- platinum-based material include platinum black, alumina, silica, or the like supported on solid platinum, chloroplatinic acid, alcohol-modified chloroplatinic acid, a complex of chloroplatinic acid and olefin, or platinum and vinylsiloxane. And the like can be exemplified.
- the amount of platinum used may be a so-called catalytic amount. For example, it can be used at a mass of 0.1 to 1,000 ppm, particularly 0.5 to 100 ppm, in terms of platinum group metal, with respect to alkoxyhydrosilanes.
- This reaction is generally preferably carried out at a temperature of 50 to 120 ° C., particularly 60 to 100 ° C., for 0.5 to 12 hours, particularly 1 to 6 hours, and can be carried out without using a solvent.
- an appropriate solvent such as toluene or xylene can be used if necessary.
- organosilicon compound having two alkoxysilyl-vinylene groups of the general formula (2) on the same silicon atom include, for example, those represented by the following structural formula. These can be used individually by 1 type or in combination of 2 or more types.
- the hydrolyzable organosilicon compound of component (B) is 0.1 to 30 parts by weight, preferably 0.5 to 20 parts by weight, more preferably 100 parts by weight of organopolysiloxane of component (A). It is used in the range of 3 to 15 parts by mass. If the amount is less than 0.1 parts by mass, sufficient crosslinking cannot be obtained, and the composition does not have the intended fast curability. The mechanical properties of the rubber properties that are obtained may also be reduced, which may cause a problem of being economically disadvantageous.
- Specific examples include ethyl silicate, propyl silicate, methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, methyltris (methoxyethoxy) silane, vinyltris (methoxyethoxy) silane, methyltripropenoxysilane. , Phenyltripropenoxysilane, and the like, and partial hydrolysis condensates thereof. These can be used singly or in combination of two or more.
- the amount of component (C) is usually 0-30 parts by weight per 100 parts by weight of component (A), preferably 0.1-20 parts by weight, more preferably 0.5- 15 parts by mass. When the blending amount exceeds 30 parts by mass, there may be a problem that the cured product becomes too hard or is economically disadvantageous.
- the curing catalyst (D) is used to promote the hydrolysis and condensation reaction between the composition of the present invention and moisture in the air, and is generally called a curing catalyst.
- a known material usually used for a room temperature curable silicone rubber composition which is cured in the presence of moisture can be used.
- Examples of the curing catalyst for component (D) include alkyltin ester compounds such as dibutyltin diacetate, dibutyltin dilaurate, dibutyltin dioctoate, tetraisopropoxytitanium, tetran-butoxytitanium, tetrakis (2-ethylhexoxy) titanium, Dipropoxybis (acetylacetonato) titanium, titanium isopropoxyoctylene glycol and other titanate esters or titanium chelate compounds, zinc naphthenate, zinc stearate, zinc-2-ethyl octoate, iron-2-ethylhexoate Alcolate aluminum compounds such as cobalt-2-ethylhexoate, manganese-2-ethylhexoate, cobalt naphthenate, aluminum isopropylate, aluminum secondary butyrate, aluminum Aluminum chelate compounds such as alkyl acetate diisopropylate
- the amount of these curing catalysts used may be a so-called catalytic amount, and the amount of component (D) is 0.001 to 20 parts by mass, especially 0.8 parts per 100 parts by mass of organopolysiloxane of component (A). 005 to 10 parts by mass, more preferably 0.01 to 5 parts by mass is preferred. If the amount is less than 0.001 part by mass, good curability cannot be obtained, so that a problem that the curing rate is delayed occurs. On the other hand, if the amount exceeds 20 parts by mass, the curability of the composition is too fast, and there is a risk that the allowable working time after application of the composition will be shortened or the mechanical properties of the resulting rubber will be reduced. is there.
- -(E) component- Component (E) is a filler (inorganic filler and / or organic resin filler), and is an optional component that can be blended as necessary, and provides sufficient mechanical strength to the cured product formed from this composition.
- Known fillers can be used, for example, finely divided silica, fumed silica, precipitated silica, silica whose surface is hydrophobized with an organosilicon compound, glass beads, glass balloons, transparent Resin beads, silica airgel, diatomaceous earth, iron oxide, zinc oxide, titanium oxide, metal oxides such as fumed metal oxide, wet silica or those whose surfaces are treated with silane, quartz powder, carbon black, talc, zeolite and Reinforcing agents such as bentonite, metal carbonates such as asbestos, glass fiber, carbon fiber, calcium carbonate, magnesium carbonate, zinc carbonate, synthesis of asbestos, glass wool, fine mica, fused silica powder, polystyrene, polyvinyl chloride, poly
- the amount of component (E) is 0 to 1000 parts by weight per 100 parts by weight of component (A), preferably 0 to 400 parts by weight, particularly 0.1 to 200 parts by weight, especially 0.5 to 200 parts by weight. Part.
- component (A) preferably 0 to 400 parts by weight, particularly 0.1 to 200 parts by weight, especially 0.5 to 200 parts by weight.
- component (A) preferably 0 to 400 parts by weight, particularly 0.1 to 200 parts by weight, especially 0.5 to 200 parts by weight. Part.
- the component (F) is an adhesion promoter and is an optional component that can be blended as necessary.
- the component (F) is used for imparting sufficient adhesiveness to a cured product formed from this composition.
- the adhesion promoter a silane coupling agent such as a functional group-containing hydrolyzable silane
- known ones are preferably used, such as a vinyl silane coupling agent, a (meth) acryl silane coupling agent, an epoxy silane coupling agent
- Examples include aminosilane coupling agents, mercaptosilane coupling agents, and the like, specifically, vinyltris ( ⁇ -methoxyethoxy) silane, ⁇ -methacryloxypropyltrimethoxysilane, ⁇ - (3,4-epoxycyclohexyl) ethyltri Methoxysilane, ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropylmethyldiethoxysilane, N- ⁇ - ⁇
- aminosilanes such as ⁇ -aminopropyltriethoxysilane, 3-2- (aminoethylamino) propyltrimethoxysilane, ⁇ -glycidoxypropyltrimethoxysilane, ⁇ - (3,4-epoxycyclohexyl), among others.
- Epoxy silanes such as ethyltrimethoxysilane and isocyanate silane are preferred.
- Component (F) is preferably blended in an amount of 0 to 30 parts by weight, preferably 0.1 to 30 parts by weight, particularly 0.5 to 20 parts by weight, based on 100 parts by weight of component (A).
- component (A) is preferably blended in an amount of 0 to 30 parts by weight, preferably 0.1 to 30 parts by weight, particularly 0.5 to 20 parts by weight, based on 100 parts by weight of component (A).
- the organopolysiloxane of component (G) is an optional component that can be blended as necessary, and is represented by the following general formula (3), and does not contain a functional group involved in the condensation reaction in the molecule (that is, A linear diorganopolysiloxane (so-called non-functional silicone oil) that does not participate in the condensation curing reaction of the composition.
- R 1 is a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and a plurality of R 1 may be the same or different.
- M is an integer of 1 to 2000. is there.
- the substituted or unsubstituted hydrocarbon group represented by R 1 has 1 to 20, preferably 1 to 10, more preferably 1 to 8 carbon atoms, which are the same or different.
- the organopolysiloxane of component (G) preferably has a viscosity at 25 ° C. of 0.65 to 1,000,000 mPa ⁇ s, more preferably 30 to 500,000 mPa ⁇ s, and particularly preferably 50 to 100. 3,000 mPa ⁇ s, particularly 100 to 80,000 mPa ⁇ s is preferable. If the organopolysiloxane has a viscosity of 10 mPa ⁇ s or more, it is easy to obtain a coating film excellent in physical and mechanical strength. If the viscosity is 1,000,000 mPa ⁇ s or less, the composition of This is preferable because the viscosity does not become too high and the workability during use is good.
- the viscosity is a numerical value measured by a rotational viscometer.
- m is an integer of 1 to 2000, but for the same reason, m is preferably about 10 to 1,500, 30 to 1,200, more preferably about 50 to 1,000. It is desirable to be an integer.
- the amount of component (G) is usually 0 to 100 parts by weight, preferably 0.1 to 80 parts by weight, more preferably 0.5 to 75 parts by weight, based on 100 parts by weight of component (A). Parts, more preferably 5 to 70 parts by weight, particularly preferably 10 to 60 parts by weight.
- the viscosity of a composition is low and sufficient workability
- operativity is obtained, it is not necessary to add, and when it exceeds 100 mass parts, rubber
- the room temperature curable organopolysiloxane composition of the present invention further includes, as additives, known flame retardants such as pigments, dyes, anti-aging agents, antioxidants, antistatic agents, antimony oxides, and paraffin chlorides. Additives can be blended. Furthermore, a polyether as a thixotropy improver, a fungicide, and an antibacterial agent can be blended.
- the room temperature curable organopolysiloxane composition of the present invention can be obtained by uniformly mixing the above-described components and further predetermined amounts of the above-mentioned various additives in a dry atmosphere.
- the room temperature curable organopolysiloxane composition is cured by allowing it to stand at room temperature, and the molding method, curing conditions, and the like can employ known methods and conditions according to the type of the composition. .
- the room temperature curable organopolysiloxane composition of the present invention thus obtained is rapidly cured at room temperature due to moisture in the air, and is excellent in heat resistance, weather resistance, low temperature characteristics, various substrates, particularly adhesion to metals.
- a rubber elastic body cured product is formed.
- the composition of the present invention is particularly excellent in storage stability and curability, for example, it quickly cures when exposed to the air after storage for 6 months, and a cured product having excellent physical properties as described above. give. Furthermore, no toxic or corrosive gases are released during curing, and no rust is produced on the surface to which this composition is applied.
- this composition does not cause contact failure of electrical and electronic parts, it is useful as an insulating material and adhesive for electrical and electronic parts, as well as a sealing agent, coating agent, coating agent for various substrates, It can be widely used as a release treatment agent and also as a fiber treatment agent. Further, the composition can be cured and molded to obtain various molded products, and the molded products have excellent heat resistance, weather resistance, and the like.
- part means “part by mass”, and the viscosity is a value measured by a rotational viscometer at 25 ° C.
- Example 1 100 parts of dimethylpolysiloxane having both ends of a molecular chain having a viscosity of 5000 mPa ⁇ s blocked with hydroxyl groups (silanol groups), 4.9 parts of bis (trimethoxysilyl-vinylene) dimethylsilane obtained in Synthesis Example 1, A composition was prepared by adding 0.75 parts of methylguanidylpropyltrimethoxysilane and mixing under moisture blocking until uniform.
- Example 2 100 parts of dimethylpolysiloxane having both ends of a molecular chain having a viscosity of 5000 mPa ⁇ s blocked with hydroxyl groups (silanol groups) and 4.9 parts of bis (trimethoxysilyl-vinylene) dimethylsilane obtained in Synthesis Example 1, Add 1.0 part of an aluminum chelate compound whose average structure represented by structural formula (2) is a mono (dipivaloylmethane) aluminum bis (ethylacetoacetate) chelate, and mix until it is uniform under moisture blocking. A composition was prepared.
- Example 3 100 parts of dimethylpolysiloxane having both ends of a molecular chain having a viscosity of 5000 mPa ⁇ s blocked with hydroxyl groups (silanol groups) and 4.9 parts of bis (trimethoxysilyl-vinylene) dimethylsilane obtained in Synthesis Example 1,
- the compound represented by the structural formula (3) is N, N, N ′, N ′, N ′′, N ′′ -hexamethyl-N ′ ′′-(trimethylsilylmethyl) -phosphorimdic triamide.
- a composition was prepared by adding a portion and mixing until moisture was cut off until uniform.
- Example 4 In the same manner as in Example 1, except that 6.6 parts of bis (trimethoxysilyl-vinylene) diphenylsilane obtained in Synthesis Example 2 was used instead of bis (trimethoxysilyl-vinylene) dimethylsilane. was prepared.
- Example 7 In Example 1, 4.5 parts of 1,6-bis (trimethoxysilyl) hexane [silicon compound represented by the following structural formula (6)] instead of bis (trimethoxysilyl-vinylene) dimethylsilane was used. A composition was prepared in the same manner except that.
- the room temperature curable organopolysiloxane composition is fast curable and becomes a cured product having excellent durability.
- Example 5 100 parts of dimethylpolysiloxane having a viscosity of 20000 mPa ⁇ s and having a molecular chain end blocked with a hydroxyl group (silanol group), 13 parts of surface hydrophobized fumed silica, and bis (trimethoxysilyl-vinylene) obtained in Synthesis Example 1 ) 8.0 parts dimethylsilane, 0.58 parts tetramethylguanidylpropyltrimethoxysilane, 0.8 parts 3-aminopropyltriethoxysilane, 3- (2-aminoethylaminopropyl) trimethoxysilane .8 parts was added and mixed under moisture blocking until uniform to prepare a composition.
- Example 6 100 parts of dimethylpolysiloxane having a viscosity of 20000 mPa ⁇ s and having a molecular chain end blocked with a hydroxyl group (silanol group), 13 parts of surface hydrophobized fumed silica, and bis (trimethoxysilyl-vinylene) obtained in Synthesis Example 1 ) 6.0 parts dimethylsilane, 0.58 parts tetramethylguanidylpropyltrimethoxysilane, 0.8 parts 3-aminopropyltriethoxysilane, 3- (2-aminoethylaminopropyl) trimethoxysilane .8 parts was added and mixed under moisture blocking until uniform to prepare a composition.
- Example 7 100 parts of dimethylpolysiloxane whose molecular chain end with a viscosity of 20000 mPa ⁇ s is blocked with a hydroxyl group (silanol group), 10 parts of dimethylpolysiloxane whose molecular chain end with a viscosity of 100 mPa ⁇ s is blocked with a trimethylsilyl group, and surface hydrophobicity 13 parts of fumed silica, 7.5 parts of bis (trimethoxysilyl-vinylene) dimethylsilane obtained in Synthesis Example 1, 0.58 parts of tetramethylguanidylpropyltrimethoxysilane, 3-aminopropyl A composition was prepared by adding 0.8 part of triethoxysilane and 0.8 part of 3- (2-aminoethylaminopropyl) trimethoxysilane and mixing under moisture blocking until uniform.
- silica 7.5 parts of bis (trimethoxysilyl-viny
- each composition prepared in Examples 5 to 7 was measured. Further, each composition immediately after preparation prepared in Reference Example 5 was extruded into a sheet having a thickness of 2 mm, exposed to air at 23 ° C. and 50% RH, and then the sheet was left in the same atmosphere for 7 days.
- the physical properties (initial physical properties) of the cured product thus obtained were measured according to JIS K-6249. The hardness was measured using a durometer A hardness meter of JIS K-6249.
- a shear (shear) adhesion test specimen having an adhesion area of 2.5 mm 2 and an adhesion heat of 1 mm was prepared using an adherend having a width of 25 mm and a length of 100 mm, and 7% at 23 ° C. and 50% RH. After curing for days, the shear adhesive strength was measured.
- the results of Examples 5 to 7 are shown in Table 4 below.
- the room temperature curable organopolysiloxane composition of the present invention is fast curable and becomes a cured product excellent in durability.
- the present invention is not limited to the above embodiment.
- the above-described embodiment is an exemplification, and it has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same effect hardening is the present invention. Included in the technical scope.
Abstract
Description
(A)下記一般式(1)で示されるオルガノポリシロキサン
を含有する〈1〉~〈4〉のいずれか1つに記載の室温硬化性オルガノポリシロキサン組成物を提供するものである。
-(A)成分-
(A)成分は、下記一般式(1)で示される、分子鎖両末端がケイ素原子に結合した水酸基(即ち、シラノール基あるいはジオルガノヒドロキシシロキシ基)で封鎖された直鎖状のオルガノポリシロキサンであり、本発明の組成物において主剤(ベースポリマー)として作用するものである。
上記一般式(1)中、R1の置換又は非置換の1価炭化水素基としては、炭素数が1~20、好ましくは1~10、より好ましくは1~8程度であり、同一または異なっていてもよく、具体的には、メチル基、エチル基、n-プロピル基、イソプロピル基、n-ブチル基、イソブチル基、tert-ブチル基、ペンチル基、ネオペンチル基、ヘキシル基、ヘプチル基、オクチル基、ノニル基、デシル基、ウンデシル基、ドデシル基、トリデシル基、テトラデシル基、ペンタデシル基、ヘキサデシル基、ヘプタデシル基、オクタデシル基、ノナデシル基、エイコシル基等のアルキル基;シクロペンチル基、シクロヘキシル基等のシクロアルキル基;ビニル基、アリル基、プロペニル基、イソプロペニル基、ブテニル基、ペンテニル基、ヘキセニル基等のアルケニル基;フェニル基、トリル基、キシリル基、α-,β-ナフチル基等のアリール基;ベンジル基、2-フェニルエチル基、3-フェニルプロピル基等のアラルキル基;また、これらの基の水素原子の一部又は全部が、F、Cl、Br等のハロゲン原子やシアノ基等で置換された基、例えば、3-クロロプロピル基、3,3,3-トリフルオロプロピル基、2-シアノエチル基等を例示することができる。これらの中でも、メチル基、エチル基、フェニル基が好ましく、入手の容易さ、生産性、コストの面からメチル基、フェニル基が特に好ましい。
なお、(A)成分のオルガノポリシロキサンが上記の粘度を取り得る範囲として、上記一般式(1)におけるnの値(分子中に存在する2官能性ジオルガノシロキサン単位の数又は重合度)は、通常、10~2,000、好ましくは30~1,500、より好ましくは50~1,200、更に好ましくは100~1,000程度が望ましい。なお、重合度(又は分子量)は、例えば、トルエン等を展開溶媒としてゲルパーミエーションクロマトグラフィ(GPC)分析におけるポリスチレン換算の数平均重合度(又は数平均分子量)等として求めたものである。(A)成分のオルガノポリシロキサンは1種又は2種以上を併用することができる。
(A)成分のオルガノポリシロキサンは、本発明の室温硬化性オルガノポリシロキサン組成物中、99~20質量%含有することが好ましく、特に95~50質量%含有することが好ましい。
(B)成分である下記一般式(2)で示される同一ケイ素原子上に2つのアルコキシシリル-ビニレン基(アルコキシシリル-エテニレン基)を有することを特徴とする加水分解性の有機ケイ素化合物は、本発明の組成物において硬化剤(架橋剤)として作用する成分であり、組成物の速硬化性に寄与し、かつ得られた硬化物(シリコーンゴム)は耐湿性に優れる。
(B)成分のアルコキシシリル-ビニレン基(アルコキシシリル-エテニレン基)を同一ケイ素原子上に2つ有するケイ素含有化合物は、例えば、同一ケイ素原子上にエチニル基を2つ有するシランと、2つのアルコキシヒドロシランをヒドロシリル化反応による、付加反応で容易に製造することができる。この反応式は、例えば下記反応式[1]で表される。
(C)成分である、上記(B)成分以外の加水分解性シラン及び/又はその部分加水分解縮合物は架橋剤であり、必要に応じて配合できる任意成分である。具体例としては、エチルシリケート、プロピルシリケート、メチルトリメトキシシラン、メチルトリエトキシシラン、ビニルトリメトキシシラン、ビニルトリエトキシシラン、メチルトリス(メトキシエトキシ)シラン、ビニルトリス(メトキシエトキシ)シラン、メチルトリプロペノキシシラン、フェニルトリプロペノキシシラン等及びこれらの部分加水分解縮合物が挙げられる。これらは1種単独でも2種以上を組み合わせても使用することができる。
(D)成分の硬化触媒は、本発明の組成物と空気中の水分との加水分解縮合反応を促進させるために使用され、一般的に硬化触媒と呼ばれるものである。これは湿分の存在下で硬化する室温硬化性シリコーンゴム組成物に通常使用されている公知のものを使用することができる。
(E)成分は充填剤(無機質充填剤及び/又は有機樹脂充填剤)であり、必要に応じて配合できる任意成分であり、この組成物から形成される硬化物に十分な機械的強度を与えるために使用される。この充填剤としては公知のものを使用することができ、例えば微粉末シリカ、煙霧質シリカ、沈降性シリカ、これらのシリカ表面を有機ケイ素化合物で疎水化処理したシリカ、ガラスビーズ、ガラスバルーン、透明樹脂ビーズ、シリカエアロゲル、珪藻土、酸化鉄、酸化亜鉛、酸化チタン、煙霧状金属酸化物などの金属酸化物、湿式シリカあるいはこれらの表面をシラン処理したもの、石英粉末、カーボンブラック、タルク、ゼオライト及びベントナイト等の補強剤、アスベスト、ガラス繊維、炭素繊維、炭酸カルシウム、炭酸マグネシウム、炭酸亜鉛などの金属炭酸塩、アスベスト、ガラスウール、微粉マイカ、溶融シリカ粉末、ポリスチレン、ポリ塩化ビニル、ポリプロピレンなどの合成樹脂粉末等が使用される。これらの充填剤のうち、シリカ、炭酸カルシウム、ゼオライトなどの無機質充填剤が好ましく、特に表面を疎水化処理した煙霧質シリカ、炭酸カルシウムが好ましい。
(F)成分は接着促進剤であり、必要に応じて配合できる任意成分であり、この組成物から形成される硬化物に十分な接着性を与えるために使用される。接着促進剤(官能性基含有加水分解性シラン等のシランカップリング剤)としては公知のものが好適に使用され、ビニルシランカップリング剤、(メタ)アクリルシランカップリング剤、エポキシシランカップリング剤、アミノシランカップリング剤、メルカプトシランカップリング剤などが例示され、具体的には、ビニルトリス(β-メトキシエトキシ)シラン、γ-メタクリロキシプロピルトリメトキシシラン、β-(3,4-エポキシシクロヘキシル)エチルトリメトキシシラン、γ-グリシドキシプロピルトリメトキシシラン、γ-グリシドキシプロピルメチルジエトキシシラン、N-β-(アミノエチル)γ-アミノプロピルトリメトキシシラン、γ-アミノプロピルトリエトキシシラン、3-2-(アミノエチルアミノ)プロピルトリメトキシシラン、γ-メルカプトプロピルトリメトキシシラン、イソシアネートシラン等が例示される。
これらの内、特にγ-アミノプロピルトリエトキシシラン、3-2-(アミノエチルアミノ)プロピルトリメトキシシラン等のアミノシラン類、γ-グリシドキシプロピルトリメトキシシラン、β-(3,4-エポキシシクロヘキシル)エチルトリメトキシシラン等のエポキシシラン類、イソシアネートシランが好ましい。
(G)成分のオルガノポリシロキサンは、必要に応じて配合できる任意成分であり、下記一般式(3)で示されるものであり、分子中に縮合反応に関与する官能性基を含有しない(即ち、組成物の縮合硬化反応に関与しない)直鎖状のジオルガノポリシロキサン(いわゆる無官能シリコーンオイル)である。
上記一般式(3)中、R1の置換又は非置換の炭化水素基としては、炭素数が1~20、好ましくは1~10、より好ましくは1~8のものであり、同一または異なっていてもよく、メチル基、エチル基、n-プロピル基、イソプロピル基、n-ブチル基、イソブチル基、tert-ブチル基、ペンチル基、ネオペンチル基、ヘキシル基、ヘプチル基、オクチル基、ノニル基、デシル基、ウンデシル基、ドデシル基、トリデシル基、テトラデシル基、ペンタデシル基、ヘキサデシル基、ヘプタデシル基、オクタデシル基、ノナデシル基、エイコシル基等のアルキル基;シクロペンチル基、シクロヘキシル基等のシクロアルキル基;ビニル基、アリル基、プロペニル基、イソプロペニル基、ブテニル基、ペンテニル基、ヘキセニル基等のアルケニル基;フェニル基、トリル基、キシリル基、α-,β-ナフチル基等のアリール基;ベンジル基、2-フェニルエチル基、3-フェニルプロピル基等のアラルキル基;また、これらの基の水素原子の一部又は全部が、F、Cl、Br等のハロゲン原子やシアノ基等で置換された基、例えば、3-クロロプロピル基、3,3,3-トリフルオロプロピル基、2-シアノエチル基等を例示することができる。これらの中でも、メチル基、エチル基が好ましく、入手の容易さ、生産性、コストの面からメチル基が特に好ましい。
上記式(3)中、mは1から2000の整数であるが、同様の理由で、mは、好ましくは10~1,500、30~1,200、より好ましくは50~1,000程度の整数であることが望ましい。
また、本発明の室温硬化性オルガノポリシロキサン組成物には、更に、添加剤として、顔料、染料、老化防止剤、酸化防止剤、帯電防止剤、酸化アンチモン、塩化パラフィン等の難燃剤など公知の添加剤を配合することができる。更に、チクソ性向上剤としてのポリエーテル、防かび剤、抗菌剤、を配合することもできる。
また、前記室温硬化性オルガノポリシロキサン組成物は、室温で放置することにより硬化するが、その成形方法、硬化条件などは、組成物の種類に応じた公知の方法、条件を採用することができる。
(B)成分のアルコキシシリル-ビニレン基を同一ケイ素原子上に2つ有するケイ素含有化合物の合成方法は、以下の通りである。
[合成例1]
機械攪拌機、温度計及び滴下ロートを備えた500mLの四つ口セパラブルフラスコに、ジエチニルジメチルシラン35.0g(0.323mol)、塩化白金酸(H2PtCl6・6H2O)の0.5wt%トルエン溶液0.10g、トルエン50mLを入れ、トリメトキシシラン83.01g(0.678mol)を滴下した。その後、85℃で6時間撹拌後、蒸留して下記に示すケイ素化合物[ビス(トリメトキシシリル-ビニレン)ジメチルシラン]を106.2g(収率90%)得た。そして、このケイ素化合物の1HNMRチャートを調べ、確かに目的物であるビス(トリメトキシシリル-ビニレン)ジメチルシラン(下記化合物)であることを確認した(トランス:シス=8:1)。この反応を下記反応式[3]に示す。
<アルコキシシリル-ビニレン基を同一ケイ素原子上に2つ有するケイ素含有化合物の合成-[ビス(トリメトキシシリル-ビニレン)ジフェニルシラン]>
機械攪拌機、温度計及び滴下ロートを備えた500mLの四つ口セパラブルフラスコに、ジエチニルジフェニルシラン34.9g(0.151mol)、塩化白金酸(H2PtCl6・6H2O)の0.5wt%トルエン溶液0.10g、トルエン50mLを入れ、トリメトキシシラン38.5g(0.315mol)を滴下した。その後、85℃で6時間撹拌後、蒸留して下記に示すケイ素化合物[ビス(トリメトキシシリル-ビニレン)ジフェニルシラン]を56.5g(収率88%)得た。そして、このケイ素化合物の1HNMRチャートを調べ、確かに目的物であるビス(トリメトキシシリル-ビニレン)ジフェニルシランであることを確認した(trans:cis==9:1)。この反応を下記反応式[4]に示す。
粘度5000mPa・sの分子鎖両末端が水酸基(シラノール基)で封鎖されたジメチルポリシロキサン100部と、合成例1で得られたビス(トリメトキシシリル-ビニレン)ジメチルシランを4.9部、テトラメチルグアニジルプロピルトリメトキシシランを0.75部加え、湿気遮断下で均一になるまで混合して組成物を調製した。
粘度5000mPa・sの分子鎖両末端が水酸基(シラノール基)で封鎖されたジメチルポリシロキサン100部と、合成例1で得られたビス(トリメトキシシリル-ビニレン)ジメチルシランを4.9部、下記構造式(2)で示される平均構造が、モノ(ジピバロイルメタン)アルミニウムビス(エチルアセトアセテート)キレートであるアルミニウムキレート化合物を1.0部加え、湿気遮断下で均一になるまで混合して組成物を調製した。
粘度5000mPa・sの分子鎖両末端が水酸基(シラノール基)で封鎖されたジメチルポリシロキサン100部と、合成例1で得られたビス(トリメトキシシリル-ビニレン)ジメチルシランを4.9部、下記構造式(3)で示されるN,N,N’,N’,N’’,N’’-ヘキサメチル-N’’’-(トリメチルシリルメチル)-ホスホリミディックトリアミドである化合物を0.2部加え、湿気遮断下で均一になるまで混合して組成物を調製した。
実施例1において、ビス(トリメトキシシリル-ビニレン)ジメチルシランの代わりに、合成例2で得られたビス(トリメトキシシリル-ビニレン)ジフェニルシラン、6.6部を用いた以外は同様に組成物を調製した。
実施例1~3において、ビス(トリメトキシシリル-ビニレン)ジメチルシランの代わりに、ビニルトリメトキシシラン[下記構造式(4)で示されるケイ素化合物]、4.1部を用いた以外は同様に組成物を調製した。
実施例1~3において、ビス(トリメトキシシリル-ビニレン)ジメチルシランの代わりに、メチルトリメトキシシラン[下記構造式(5)で示されるケイ素化合物]、3.8部を用いた以外は同様に組成物を調製した。
実施例1において、ビス(トリメトキシシリル-ビニレン)ジメチルシランの代わりに、1,6-ビス(トリメトキシシリル)ヘキサン[下記構造式(6)で示されるケイ素化合物]、4.5部を用いた以外は同様に組成物を調製した。
実施例1~4及び比較例1~7で調製された各組成物のタックフリータイムを測定した。
また、実施例1~4及び比較例1~7で調製された調製直後の各組成物を厚さ2mmのシート状に押し出し、23±2℃,50±5%RHの空気に曝し、次いで、該シートを同じ雰囲気下に3日間放置して得た硬化物の物性(初期物性)を、JIS K-6249に準拠して測定した。なお、硬さは、JIS K-6249のデュロメーターA硬度計を用いて測定した。
更に、この硬化物を85℃,85%RHの恒温恒湿器に7日間保管したものを同様に測定した。また、この硬化物を150℃のオーブンで10日間加熱したものを同様に測定した。
下記に、実施例1、4、比較例1、4、7の結果を表1に、実施例2、比較例2、5の結果を表2に、実施例3、比較例3、6の結果を表3に示す。
粘度20000mPa・sの分子鎖量末端が水酸基(シラノール基)で封鎖されたジメチルポリシロキサン100部と、表面疎水化処理ヒュームドシリカ13部、合成例1で得られたビス(トリメトキシシリル-ビニレン)ジメチルシランを8.0部、テトラメチルグアニジルプロピルトリメトキシシランを0.58部、3-アミノプロピルトリエトキシシラン0.8部、3-(2-アミノエチルアミノプロピル)トリメトキシシラン0.8部を加え、湿気遮断下で均一になるまで混合して組成物を調整した。
粘度20000mPa・sの分子鎖量末端が水酸基(シラノール基)で封鎖されたジメチルポリシロキサン100部と、表面疎水化処理ヒュームドシリカ13部、合成例1で得られたビス(トリメトキシシリル-ビニレン)ジメチルシランを6.0部、テトラメチルグアニジルプロピルトリメトキシシランを0.58部、3-アミノプロピルトリエトキシシラン0.8部、3-(2-アミノエチルアミノプロピル)トリメトキシシラン0.8部を加え、湿気遮断下で均一になるまで混合して組成物を調整した。
粘度20000mPa・sの分子鎖量末端が水酸基(シラノール基)で封鎖されたジメチルポリシロキサン100部と、粘度100mPa・sの分子鎖末端がトリメチルシリル基で封鎖されたジメチルポリシロキサン10部と、表面疎水化処理ヒュームドシリカ13部、合成例1で得られたビス(トリメトキシシリル-ビニレン)ジメチルシランを7.5部、テトラメチルグアニジルプロピルトリメトキシシランを0.58部、3-アミノプロピルトリエトキシシラン0.8部、3-(2-アミノエチルアミノプロピル)トリメトキシシラン0.8部を加え、湿気遮断下で均一になるまで混合して組成物を調整した。
また、参照実施例5で調製された調製直後の各組成物を厚さ2mmのシート状に押し出し、23℃,50%RHの空気に曝し、次いで、該シートを同じ雰囲気下に7日間放置して得た硬化物の物性(初期物性)を、JIS K-6249に準拠して測定した。なお、硬さは、JIS K-6249のデュロメーターA硬度計を用いて測定した。
下記に、実施例5~7の結果を表4に示す。
Claims (7)
- 下記(A)、(B)及び(D)成分を含有する室温硬化性オルガノポリシロキサン組成物。
(A)下記一般式(1)で示されるオルガノポリシロキサン
(B)下記一般式(2)で示される同一ケイ素原子上に2つのシリル-ビニレン基を有することを特徴とする有機ケイ素化合物:(A)成分100質量部に対して0.1~30質量部
(D)硬化触媒:(A)成分100質量部に対して0.001~20質量部 - 更に、(C)(B)成分を除く加水分解性シラン及び/又はその部分加水分解縮合物:(A)成分100質量部に対して0.1~30質量部
を含有することを特徴とする請求項1に記載の室温硬化性オルガノポリシロキサン組成物。 - 更に、(E)充填剤:(A)成分100質量部に対して0.1~1000質量部
を含有することを特徴とする請求項1又は2に記載の室温硬化性オルガノポリシロキサン組成物。 - 更に、(F)接着促進剤:(A)成分100質量部に対して0.1~30質量部
を含有することを特徴とする請求項1~3のいずれか1項に記載の室温硬化性オルガノポリシロキサン組成物。 - 請求項1に記載の室温硬化性オルガノポリシロキサン組成物を含有するシール剤、コーティング剤又は接着剤。
- 請求項1に記載の室温硬化性オルガノポリシロキサン組成物の硬化物からなる成形物。
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JPWO2015194340A1 (ja) | 2017-06-01 |
JP6497390B2 (ja) | 2019-04-10 |
KR20170018408A (ko) | 2017-02-17 |
US10040923B2 (en) | 2018-08-07 |
US20170130031A1 (en) | 2017-05-11 |
KR102326223B1 (ko) | 2021-11-15 |
EP3156458A1 (en) | 2017-04-19 |
CN106459586A (zh) | 2017-02-22 |
CN106459586B (zh) | 2019-11-26 |
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