WO2016006252A1 - 剥離コントロール剤、それを含むシリコーン剥離剤組成物、剥離シート、及び積層体 - Google Patents
剥離コントロール剤、それを含むシリコーン剥離剤組成物、剥離シート、及び積層体 Download PDFInfo
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- WO2016006252A1 WO2016006252A1 PCT/JP2015/003478 JP2015003478W WO2016006252A1 WO 2016006252 A1 WO2016006252 A1 WO 2016006252A1 JP 2015003478 W JP2015003478 W JP 2015003478W WO 2016006252 A1 WO2016006252 A1 WO 2016006252A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
- C08G77/24—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen halogen-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
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/20—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for coatings strippable as coherent films, e.g. temporary coatings strippable as coherent films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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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
- 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
-
- C—CHEMISTRY; METALLURGY
- 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
- C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/401—Adhesives in the form of films or foils characterised by release liners characterised by the release coating composition
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/72—Cured, e.g. vulcanised, cross-linked
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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
-
- 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
-
- 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
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
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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
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
-
- 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
- C09J2483/00—Presence of polysiloxane
-
- 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
- C09J2483/00—Presence of polysiloxane
- C09J2483/005—Presence of polysiloxane in the release coating
Definitions
- the present invention relates to a release control agent and a silicone release agent composition containing the same.
- a release agent composition characterized by being lightly peeled after pressure treatment to pressure-sensitive adhesives such as pressure-sensitive adhesives including silicone-based adhesives, and a cured layer formed by curing the release agent composition It is related with the peeling sheet containing and a laminated body.
- the release agent composition is applied on the surface of various substrates such as paper, synthetic resin film, synthetic fiber, or cloth, and cured to form a hardened layer. Thus, a peelable film can be formed.
- a release agent composition one containing an organopolysiloxane having a fluorine atom-containing siloxane unit is known.
- a silicone composition for mold release comprising a methyl hydrogen polysiloxane having a terminal blocked with a trimethylsiloxy group, a methyl vinyl polysiloxane having a terminal blocked with a dimethylvinylsiloxy group, and a compound having a perfluoroalkyl group is proposed.
- Japanese Patent Publication No. 63-48901 Japanese Patent Publication No. 63-48901
- a coating composition containing a fluorosilicone polymer having a fluoroalkyl group and a vinyl group has also been proposed (Japanese Patent Laid-Open No. 63-320).
- a release agent composition containing a fluorosilicone polymer not containing an alkenyl group an organopolysiloxane having at least one fluorine atom-containing organic group in one molecule and having no alkenyl group and no silicon-bonded hydrogen atom
- a silicone release agent composition containing JP-A-6-279681 JP-A-6-279681.
- these conventional release agent compositions are excellent in the peelability of the cured film with respect to the organic resin-based adhesive substance, but the silicone-based adhesive mainly composed of organopolysiloxane such as dimethylpolysiloxane or methylphenylpolysiloxane.
- organopolysiloxane such as dimethylpolysiloxane or methylphenylpolysiloxane.
- the long release sheet or the like is usually wound into a roll and transported in the state of a wound body. Stored. At that time, it is known that a winding pressure is applied particularly at the center of the winding body. However, when this winding pressure is applied, there is also a problem that the release layer is heavily peeled from the adhesive substance. .
- the present invention has been made to solve the above-described problems of the prior art, and has a sufficient peelability for a silicone-based pressure-sensitive adhesive and also exhibits a good peelability even when pressure is applied to a cured product. It aims at providing the peeling control agent for setting it as an agent composition.
- It is also an object of the present invention to provide a silicone release agent composition comprising a release control agent according to the present invention, a release sheet comprising a cured layer comprising the cured product, and a laminate comprising the release sheet and an adhesive layer.
- the object of the present invention is achieved by a release control agent comprising an organopolysiloxane having 15 to 29 mol% of fluorine atom-containing organic groups per molecule and no hydrosilylation reactive group.
- the hydrosilylation reactive group is typically an organic group containing a carbon-carbon double bond such as an alkenyl group or an acryl group or a silicon atom-bonded hydrogen atom, but the organopolysiloxane according to the present invention includes: It is particularly preferable that the hydrosilylation reactive group does not contain an alkenyl group.
- One or more molecular chain terminals of the organopolysiloxane are preferably trimethylsilyl groups.
- the fluorine atom-containing organic group is C n F 2n + 1 —R—, C n F 2n + 1 —R—O—R—, or F (CF (CF 3 ) CF 2 O) n CF (CF 3 ) —R—O.
- a group represented by —R— (wherein each R is independently a divalent hydrocarbon group and n is an integer of 1 to 20) is preferable.
- the degree of polymerization of the organopolysiloxane is preferably 100 to 10,000.
- the present invention (A) an organopolysiloxane having at least one fluorine atom-containing organic group and at least two alkenyl groups in one molecule; (B) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in one molecule;
- the present invention also relates to a silicone release agent composition comprising (C) the release control agent of the present invention and (D) a hydrosilylation reaction catalyst.
- the content of the component (B) is preferably 0.1 to 40 parts by mass with respect to 100 parts by mass of the component (A).
- the content of the component (C) is preferably 0.01 to 20 parts by mass with respect to 100 parts by mass of the component (A).
- the present invention also relates to a cured layer comprising a cured product of the silicone release agent composition and a release sheet comprising a sheet-like substrate.
- the sheet-like substrate is preferably paper, a plastic film or a cloth.
- the present invention also relates to a laminate including the release sheet and an adhesive layer.
- a release control agent containing an organopolysiloxane having 15 to 29 mol% of fluorine atom-containing organic groups in one molecule and no hydrosilylation reactive group it is possible to provide a release agent composition capable of forming a cured film excellent in releasability with respect to the agent. Moreover, even when a long release sheet is wound up, the releasability is not impaired, and light release is possible even after the press treatment.
- the release control agent of the present invention can be suitably blended in a silicone release agent composition without greatly affecting the adhesive force, and forms a film having excellent adhesion to various substrate surfaces. be able to.
- the release control agent of the present invention is characterized by containing an organopolysiloxane having 15 to 29 mol% of fluorine atom-containing organic groups in one molecule and no hydrosilylation reactive group.
- the content of fluorine atom-containing organic groups is calculated as the proportion of siloxane units having fluorine atom-containing organic groups out of all siloxane units constituting the organopolysiloxane molecule.
- the content of the fluorine atom-containing organic group in the organopolysiloxane is 15 to 29 mol%, preferably 16, 17, 18 or 19 mol% or more, and 28 or 27 mol% or less. Particularly preferably, the content of the fluorine atom-containing organic group in the organopolysiloxane is in the range of 19 to 27 mol%. On the other hand, when the content of the fluorine atom-containing organic group in one molecule is less than the lower limit or exceeds the upper limit, excellent peelability may not be obtained.
- the organopolysiloxane is characterized by not containing a hydrosilylation reactive group in the molecule in addition to the content of fluorine atom-containing organic groups.
- the organopolysiloxane contains a hydrosilylation-reactive group, particularly in a silicone release agent composition that is cured by a hydrosilylation reaction, the organopolysiloxane contains a crosslinking agent or a main agent in a silicone cured product having release properties. In some cases, excellent peelability may not be realized as a release control agent.
- the hydrosilylation reactive group is a reactive functional group that can participate in an addition reaction between a carbon-carbon double bond and a silicon atom-bonded hydrogen atom in the presence of a hydrosilylation reaction catalyst such as a platinum-based metal catalyst.
- a hydrosilylation reaction catalyst such as a platinum-based metal catalyst.
- an organic group having at least part of a carbon-carbon double bond such as an alkenyl group having 2 to 20 carbon atoms, an acryl group or a methacryl group, or a silicon atom-bonded hydrogen atom.
- the organopolysiloxane preferably has no alkenyl group or silicon-bonded hydrogen atom in the molecule, and particularly preferably does not have an alkenyl group.
- the obtained release control agent is used as a silicone release agent composition even when the content of fluorine atom-containing organic groups is within the above range. The light release characteristics when added to may be impaired.
- the molecular chain terminal of the organopolysiloxane is preferably a trimethylsiloxy group or a silanol group, and more preferably one or more of the molecular chain terminals is a trimethylsilyl group.
- the fluorine atom-containing organic group includes C n F 2n + 1 —R—, C n F 2n + 1 —R—O—R—, or F (CF (CF 3 ) CF 2 O) n CF (CF 3 ) —R—O—.
- a group represented by R— (wherein each R is independently a divalent hydrocarbon group and n is an integer of 1 to 20) is preferable.
- Divalent hydrocarbon groups include alkylene groups such as methylene, ethylene, methylmethylene, propylene, and butylene; arylene groups such as phenylene, tolylene, and xylylene; and methylphenylene and ethyl
- alkylene arylene group such as a phenylene group is exemplified.
- the silicon atom-bonded organic group other than the fluorine atom-containing organic group is not particularly limited as long as it is a functional group not containing a hydrosilylation reactive group.
- an organic group include methyl group, ethyl group
- monovalent hydrocarbon groups such as alkyl groups such as a group, propyl group and butyl group; aryl groups such as phenyl group, tolyl group and xylyl group; and aralkyl groups such as benzyl group and phenethyl group.
- the molecular structure of the organopolysiloxane is not particularly limited, and may be any of linear, cyclic, resinous, partially branched linear, or partially cross-linked. .
- the viscosity is not particularly limited, and a low-viscosity liquid organopolysiloxane to a high-viscosity gum-like organopolysiloxane can be used.
- the viscosity at 25 ° C. is in the range of 100 to 1,000,000 mPa ⁇ s as measured using a B-type viscometer in accordance with JIS K7117-1. Is preferred.
- the degree of polymerization of the organopolysiloxane is preferably 100 to 10,000, more preferably 500 to 5,000, and still more preferably 800 to 3,000.
- organopolysiloxane examples include a trimethylsiloxy group-blocked methyl (3,3,3-trifluoropropyl) polysiloxane having both molecular chains and a trimethylsiloxy-blocked methyl (3,3,3-methyl) having both molecular chains.
- Trifluoropropyl) siloxane / dimethylsiloxane copolymer trimethylsiloxy-capped methyl (perfluorobutylethyl) siloxane / dimethylsiloxane copolymer with both ends of molecular chain, trimethylsiloxy group-capped methyl (perfluorohexylethyl) siloxane with molecular chain at both ends ⁇ Dimethylsiloxane copolymer, silanol group-blocked methyl (3,3,3-trifluoropropyl) siloxane with molecular chain at both ends ⁇ Dimethylsiloxane copolymer, silanol group-blocked methyl (perfluorobutylethyl) siloxane with molecular chain at both ends Dimethyl siloxane Copolymer, silanol group-blocked methyl (perfluorobutylethyl) siloxane with molecular chain at both ends Dimethyl siloxane
- peeling control agent of this invention it is also possible to use 1 type of these organopolysiloxane individually or in mixture of 2 or more types.
- the present invention (A) an organopolysiloxane having at least one fluorine atom-containing organic group and at least two alkenyl groups in one molecule; (B) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in one molecule;
- the present invention also relates to a silicone release agent composition comprising (C) the release control agent of the present invention and (D) a hydrosilylation reaction catalyst.
- Component (A) is the main component of the silicone release agent composition, and is an organopolysiloxane having at least one fluorine atom-containing organic group and at least two alkenyl groups in one molecule.
- an alkenyl group is a hydrosilylation reactive group, and is a component distinguished from the peeling control agent ((C) component) according to the present invention.
- fluorine atom-containing organic groups in component (A) include C n F 2n + 1 —R—, C n F 2n + 1 —R—O—R—, and F (CF (CF 3 ) CF 2 O). and a group represented by n CF (CF 3 ) —R—O—R— (wherein each R is independently a divalent hydrocarbon group, and n is an integer of 1 to 20). .
- the component (A) preferably has 10 to 75 mol%, more preferably 10 to 50 mol% of fluorine atom-containing organic groups in one molecule.
- Divalent hydrocarbon groups include alkylene groups such as methylene, ethylene, methylmethylene, propylene, and butylene; arylene groups such as phenylene, tolylene, and xylylene; and methylphenylene and ethyl
- alkylene arylene group such as a phenylene group is exemplified.
- the silicon atom-bonded organic group other than the fluorine atom-containing organic group and the alkenyl group in the component (A) is not particularly limited, and as such an organic group, specifically, a methyl group, an ethyl group, a propyl group, And alkyl groups such as butyl group; aryl groups such as phenyl group, tolyl group and xylyl group; and monovalent hydrocarbon groups such as aralkyl groups such as benzyl group and phenethyl group.
- the silicon atom-bonded organic group other than the fluorine atom-containing organic group and the alkenyl group is a methyl group or a phenyl group.
- the organopolysiloxane of component (A) may have a small amount of hydroxyl groups or alkoxy groups.
- the molecular structure of the component (A) is not particularly limited, and may be any of linear, cyclic, resinous, and partially branched linear, and partially has a cross bond But you can. Also, the viscosity is not particularly limited, and a low-viscosity liquid organopolysiloxane to a high-viscosity gum-like organopolysiloxane can be used. Since a cured film having particularly excellent peelability can be formed, the viscosity of component (A) at 25 ° C. is measured using a B-type viscometer according to JIS K7117-1, and is 100 to 1,000. , Preferably in the range of 1,000 mPa ⁇ s.
- molecular chain both ends dimethylvinylsiloxy group-blocked methyl (3,3,3-trifluoropropyl) polysiloxane, molecular chain both ends dimethylvinylsiloxy blocked (3,3 , 3-Trifluoropropyl) siloxane / dimethylsiloxane copolymer, both ends of molecular chain dimethylvinylsiloxy-blocked (3,3,3-trifluoropropyl) siloxane / dimethylsiloxane / methylvinylsiloxane copolymer, both ends of molecular chain Dimethylvinylsiloxy-blocked (3,3,3-trifluoropropyl) siloxane / methylvinylsiloxane copolymer, dimethylvinylsiloxy group-blocked methyl (perfluorobutylethyl) siloxane / dimethylsi
- Component (B) is an organohydrogenpolysiloxane that acts as a crosslinking agent in the composition of the present invention and has at least two silicon-bonded hydrogen atoms in one molecule.
- the silicon atom-bonded hydrogen atom is a hydrosilylation reactive group and is a component that is distinguished from the release control agent (component (C)) according to the present invention.
- the silicon atom-bonded organic group other than the silicon atom-bonded hydrogen atom in the component (B) is not particularly limited, and specifically, alkyl groups such as methyl group, ethyl group, propyl group, butyl group, and benzyl group; Examples thereof include aryl groups such as a group, tolyl group, and xylyl group; and monovalent hydrocarbon groups such as an aralkyl group such as a benzyl group and a phenethyl group.
- the organohydrogenpolysiloxane of component (B) may have a fluorine atom-containing organic group.
- a fluorine atom-containing organic group include C n F 2n + 1 —R—, C n F 2n + 1 —R—O—R— and F (CF (CF 3 ) CF 2 O) n CF (CF 3 ) —R—O—R— (wherein each R is independently a divalent carbon A hydrogen group, and n is an integer of 1 to 20.
- Divalent hydrocarbon groups include alkylene groups such as methylene, ethylene, methylmethylene, propylene, and butylene; arylene groups such as phenylene, tolylene, and xylylene; and methylphenylene and ethyl
- alkylene arylene group such as a phenylene group is exemplified.
- the molecular structure of such component (B) is not particularly limited, and may be any of linear, cyclic, resinous, and partially branched linear, and partially has a cross-linkage But you can.
- the viscosity is not particularly limited, and the viscosity at 25 ° C. is measured using a B-type viscometer in accordance with JIS K7117-1 because it is suitable for easy handling and a crosslinking agent. It is preferably in the range of 100,000 mPa ⁇ s.
- organohydrogenpolysiloxane of component (B) include trimethyl-blocked methylhydrogen polysiloxane having both molecular chains and trimethylsiloxy-blocked methylhydrogensiloxane / methyl (3, 3, 3- Trifluoropropyl) siloxane copolymer, trimethylsiloxy-capped dimethylsiloxane / methylhydrogensiloxane copolymer with both ends of molecular chain, dimethylhydrogensiloxy-capped methyl (perfluorobutylethyl) siloxane / methylhydrogensiloxane copolymer with both ends of molecular chain, Molecular chain both ends trimethylsiloxy group-blocked methyl (perfluorobutylethyl) siloxane / dimethylsiloxane / methylhydrogensiloxane copolymer, molecular chain both ends trimethylsiloxy group-blocked methyl (perfluorobutylethy
- the content of the component (B) is in the range of 0.1 to 40 parts by weight, preferably 0.1 to 20 parts by weight with respect to 100 parts by weight of the component (A). is there. This is because when the content of the component (B) is less than 0.1 parts by mass with respect to 100 parts by mass of the component (A), the cured film forming rate of the obtained silicone release agent composition is remarkably slow, Moreover, when this exceeds 40 mass parts, it is because the light peelability with respect to the adhesive substance of the obtained cured film may not be implement
- Component (C) is a release control agent of the present invention, and is a component for imparting excellent peelability to a film obtained by curing a silicone release agent composition.
- the content of component (C) is in the range of 0.01 to 20 parts by weight, preferably in the range of 1 to 15 parts by weight, with respect to 100 parts by weight of component (A).
- the content of the component (C) is less than 0.01 parts by mass with respect to 100 parts by mass of the component (A)
- the light release property to the adhesive substance of the film obtained by curing (peelable cured film) is remarkable. May decrease.
- the content of the component (C) exceeds 20 parts by mass, the strength of the coating obtained by curing is significantly reduced, and the component (C) is likely to ooze out from the cured coating, and the residual adhesion rate described later is remarkable. May decrease.
- the component (D) is a hydrosilylation reaction catalyst that acts as a catalyst for crosslinking the organopolysiloxane of the component (A) and the organohydrogenpolysiloxane of the component (B).
- the hydrosilylation reaction catalyst of component (D) is not particularly limited.
- the fine platinum, chloroplatinic acid, alcohol-modified chloroplatinic acid, chloroplatinic acid adsorbed on silica fine powder or carbon powder carrier examples include olefin complexes, coordination compounds of chloroplatinic acid and vinylsiloxane, platinum black, palladium, and rhodium catalysts.
- the content of the component (D) is a catalytic amount, and when a platinum-based catalyst is used as the component (D), the amount of platinum metal contained in the platinum-based catalyst is The amount within the range of 0.01 to 1,000 ppm by mass unit in the silicone release agent composition is practically preferable, and the amount within the range of 0.1 to 500 ppm is particularly preferable.
- the silicone release agent composition of the present invention contains the components (A) to (D) and can be prepared by uniformly mixing them.
- the method for preparing the silicone release agent composition of the present invention is not particularly limited. For example, after the (A) component and the (B) component are uniformly mixed, the mixture of the (C) component and the (D) component is blended. Method, (A) component, (B) component, and (C) component After mixing uniformly, the method of mix
- an organic solvent can be used as necessary as a component other than the components (A) to (D).
- the organic solvent can be uniformly mixed, and various groups of the obtained silicone release agent composition of the present invention can be used. The applicability to the material can be improved.
- the organic solvent that can be blended in the silicone release agent composition of the present invention is not particularly limited as long as it can uniformly dissolve the components (A) to (C).
- organic solvents include aromatic hydrocarbon organic solvents such as trifluorotoluene and hexafluoroxylene; aliphatic hydrocarbon organic solvents such as heptane, hexane, pentane, and isooctane; trichloroethylene and perfluoroethylene.
- Examples include halogenated hydrocarbon organic solvents such as chloroethylene; ketone organic solvents such as acetone and methyl ethyl ketone; ether solvents such as diethyl ether and methyl butyl ether; and ester organic solvents such as methyl acetate and ethyl acetate.
- halogenated hydrocarbon organic solvents such as chloroethylene
- ketone organic solvents such as acetone and methyl ethyl ketone
- ether solvents such as diethyl ether and methyl butyl ether
- ester organic solvents such as methyl acetate and ethyl acetate.
- the silicone release agent composition of the present invention contains 3-methyl-1-butyne as an optional component for suppressing the catalytic activity of the component (D) and improving the storage stability of the composition at room temperature.
- Alkynyl alcohols such as -3-ol, 3,5-dimethyl-1-hexyn-3-ol, 3-methyl-1-penten-3-ol, or phenylbutynol; or 3-methyl-3-pentene-1 It is preferable to add a small amount of hydrosilylation reaction inhibitor such as -in, 3,5-dimethyl-1-hexyne-3-in, (tetramethylvinylsiloxane) cyclic or benzotriazole.
- the silicone release agent composition of the present invention contains the above components (A) to (D), and may optionally contain an organic solvent and a hydrosilylation reaction inhibitor.
- the viscosity at 25 ° C. is measured using a B-type viscometer in accordance with JIS K7117-1 in order to obtain good coating properties on a substrate. , Preferably in the range of 1,000 mPa ⁇ s.
- an adhesion promoter comprising an alkoxysilane compound such as 3-glycidoxypropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane; phenol, quinone, amine, phosphorus, phosphite, sulfur, Antioxidants such as thioethers; light stabilizers such as triazoles and benzophenones; flame retardants such as phosphate esters, halogens, phosphorus, and antimony; cationic surfactants, anionic surfactants, non One or more kinds of surfactants composed of ionic surfactants and the like; known additives such as antistatic agents, heat-resistant agents, dyes and pigments can be added.
- an adhesion promoter comprising an alkoxysilane compound such as 3-glycidoxypropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane; phenol, quinone, amine, phosphorus, phosphite,
- the silicone release agent composition of the present invention is applied to the surface of various sheet-like substrates such as paper, plastic film or cloth, and then, for example, room temperature or heating temperature 50 to 200 ° C., heating time 20 to 300 seconds.
- various sheet-like substrates such as paper, plastic film or cloth
- room temperature or heating temperature 50 to 200 ° C., heating time 20 to 300 seconds By curing under the above conditions, a film excellent in peelability for adhesive materials such as pressure sensitive adhesives including silicone adhesives, various sheet forms such as paper, plastic film, or cloth
- a film having excellent adhesion can be formed on the substrate surface.
- a cured layer comprising a cured product of the silicone release agent composition of the present invention and a release sheet comprising a sheet-like substrate can be produced.
- the sheet-like substrate examples include paper such as Japanese paper, paperboard, cardboard paper, clay coated paper, polyolefin laminated paper, particularly polyethylene laminated paper, and synthetic paper; polyimide, polyethylene, polypropylene, polystyrene, polyvinyl chloride, Examples thereof include plastic films such as polycarbonate, polyethylene terephthalate, and nylon; fabrics such as natural fiber cloth, synthetic fiber cloth, and artificial leather cloth; glass wool, and metal foil.
- one or both surfaces of the sheet-like substrate are subjected to a surface treatment such as an oxidation method or an uneven method, or a primer treatment.
- a surface treatment such as an oxidation method or an uneven method, or a primer treatment.
- the oxidation method include corona discharge treatment, plasma discharge treatment, chromium oxidation treatment (wet), flame treatment, hot air treatment, ozone treatment, and ultraviolet irradiation treatment.
- the uneven method include a sand blast method and a thermal spraying method.
- a suitable method can be selected according to the type of the sheet-like substrate.
- the silicone release agent composition of the present invention when used as a release film for dielectric ceramic layer molding materials, particularly as a release film for molding ceramic green sheets, an antistatic treatment is performed on these sheet-like substrates (films).
- This as a sheet-like substrate is also effective in preventing the occurrence of defective coating of the ceramic slurry on the sheet-like substrate.
- the thickness of the sheet-like substrate is generally 10 to 300 ⁇ m, preferably 15 to 200 ⁇ m, and particularly preferably 20 to 125 ⁇ m.
- the method for coating the silicone release agent composition of the present invention on the sheet-like substrate can be carried out using any known method, such as gravure coating, bar coating, spray coating, spin coating. Method, knife coating method, roll coating method, die coating method or the like can be used.
- the thickness of the cured layer of the silicone release agent composition is not particularly limited, but is preferably 0.01 to 10 ⁇ m. More preferably, the thickness is 0.01 to 5 ⁇ m.
- the release sheet coated with the silicone release agent composition and cured is coated with an adhesive substance such as a silicone-based adhesive on the surface opposite to the surface on which the silicone release agent composition is applied, It can be set as this laminated body.
- the adhesive substances applied to the laminate are various adhesives, various adhesives, etc., and are acrylic resin adhesives, rubber adhesives, silicone adhesives, acrylic resin adhesives, synthetic rubber adhesives. And silicone adhesives, epoxy resin adhesives, and polyurethane adhesives. Moreover, sticky foods such as asphalt and straw, glue, and bird rice cake are exemplified. In particular, a silicone-based pressure-sensitive adhesive is preferable.
- the cured layer composed of the silicone release agent composition of the present invention is excellent in light release properties with respect to other adhesive layers, and therefore is a process paper, an adhesive material wrapping paper, an adhesive tape, an adhesive label, A laminate such as a protective sheet, a re-peelable adhesive sheet, and a release film for a dielectric ceramic layer molding material (for example, a release film for molding a ceramic green sheet) can be used as a release layer.
- a cured layer (release layer or release layer) obtained by heat-curing the silicone release agent composition of the present invention on at least one surface of a sheet-like substrate.
- a pressure-sensitive adhesive sheet provided with a pressure-sensitive adhesive layer (or an adhesive layer) on at least one surface of the sheet-shaped base material, and the pressure-sensitive adhesive layer in contact with the cured layer.
- a laminated body configured by being worn can be obtained.
- the surface of the sheet-like substrate opposite to the cured layer made of the silicone release agent composition of the present invention or between the sheet-like substrate and the cured layer made of the silicone release agent composition of the present invention is as described above.
- other layers may optionally be provided.
- a protective sheet or re-peelable adhesive sheet comprising a cured layer made of the composition of the present invention is a member such as a metal plate, a painted metal plate, an aluminum sash, a resin plate, a decorative steel plate, a vinyl chloride laminated steel plate, or a glass plate. When transporting, processing or curing, etc., it is used for the purpose of sticking and protecting on the surface of these members. Also, as a protective sheet used in the manufacturing process of various liquid crystal display panels (also referred to as monitors or displays), the distribution process of polarizing plates, the manufacturing process and distribution process of resin members for various machines such as automobiles, food packaging, etc. It can be preferably used.
- a sheet-like article having a cured layer made of the composition of the present invention is an optical component such as a liquid crystal panel, a plasma display, a polarizing plate and a retardation plate, or an electrical / electronic component such as a printed wiring board, IC, transistor or capacitor.
- an optical component such as a liquid crystal panel, a plasma display, a polarizing plate and a retardation plate, or an electrical / electronic component such as a printed wiring board, IC, transistor or capacitor.
- a known antistatic agent to the composition of the present invention.
- a sheet-like article having a sheet-like substrate and a cured layer obtained by coating and curing the silicone release agent composition of the present invention thereon is a release film for a dielectric ceramic layer molding material, particularly It can be used as a release film for forming a ceramic green sheet.
- the ceramic green sheet is prepared by a method including a step of applying a ceramic slurry on the release film for forming a ceramic green sheet of the present invention, that is, on the side of the surface of the cured polyorganosiloxane composition, and drying the slurry. be able to.
- Fluorosilicone used for the release agent compositions in Examples and Comparative Examples was synthesized according to the following method.
- silicone adhesives in Examples and Comparative Examples were prepared according to the following method.
- Preparation of silicone adhesive Addition-curing silicone adhesive SD4580FC manufactured by Toray Dow Corning Co., Ltd. 100 parts of toluene and diluted with 50 parts of toluene, and further, BY24-741 CROSSLINKER 1 part manufactured by Toray Dow Corning Co., Ltd. and Toray Dow Co., Ltd. as a platinum catalyst 0.9 parts of Corning NC-25 CATALYST was added and stirred well.
- the silicone release agent composition was applied to the base material surface of the polyethylene terephthalate resin film using a Mayer bar # 10 so that the coating amount was about 1 g / m 2 and heated in a hot air circulation oven at 150 ° C. for 40 seconds. Thus, a release sheet was prepared. Subsequently, an adhesive layer was formed on the release sheet under any one of the following conditions 1 to 3, and a laminate was prepared by bonding to a polyethylene terephthalate resin film.
- the laminate was cut to a width of 2.5 cm to prepare a test piece, and using a tensile tester, the film on which the silicone release agent composition was applied was peeled off at an angle of 180 ° at a rate of 0.3 m / min. The force [gf / in] required for peeling was measured.
- the release sheet obtained by heating for 40 seconds in a hot air circulation oven at 150 ° C. was left as it was at room temperature for 1 day after taking out from the oven. Thereafter, the pressure-sensitive adhesive was applied onto the release agent-coated surface so that the applied thickness of the pressure-sensitive adhesive after curing was 100 ⁇ m. After standing at room temperature for 150 seconds, it was cured in an oven at 180 ° C. for 150 seconds. The obtained pressure-sensitive adhesive sheet was taken out of the oven, bonded to a polyethylene terephthalate resin film with a 2 kgf hand roller, and aged at room temperature for 30 minutes under a load of 20 g / cm 2 .
- Laminate sample preparation condition 2 After removing the release sheet obtained by heating in a hot air circulation oven at 150 ° C. for 40 seconds from the oven, the adhesive coating thickness after curing the adhesive is 100 ⁇ m on the release agent coated surface. Applied. After standing at room temperature for 150 seconds, it was cured in an oven at 180 ° C. for 150 seconds. The obtained pressure-sensitive adhesive sheet was taken out from the oven, bonded to a polyethylene terephthalate resin film with a 2 kgf hand roller, and aged at room temperature for 1 day under a load of 100 kg / cm 2 .
- the test piece which was prepared under the above-described evaluation laminate sample preparation condition 1 and measured for the above-mentioned peeling resistance, was attached to a mirror stainless steel plate using a 2 kg hand roller, and was allowed to stand at room temperature for 30 minutes. Subsequently, the test piece was peeled off at an angle of 180 ° under the peeling speed of 0.3 m / min, and the force (F1) [gf / in] required for peeling was measured. Separately from the above, the pressure-sensitive adhesive was applied to a polyethylene terephthalate resin film so that the applied thickness of the pressure-sensitive adhesive after curing was 100 ⁇ m.
- the coated material was allowed to stand at room temperature for 150 seconds and then cured in an oven at 180 ° C. for 150 seconds. Thereafter, the cured product was allowed to stand at room temperature for 1 day, and then cut into a width of 2.5 cm to prepare a test piece.
- This test piece was affixed to a mirror surface stainless steel plate using a 2 kg hand roller, and was allowed to stand at room temperature for 30 minutes. Next, the test piece was peeled off at an angle of 180 ° under a peeling speed of 0.3 m / min, and the force (F2) [gf / in] required for peeling was measured. The residual adhesion rate ((F1) / (F2)) ⁇ 100 [%] was determined.
- Example 1 Preparation of silicone release agent composition
- a mixture of a trace amount of platinum catalyst and a solvent (solid content: 85%) is diluted by adding 88.24 parts of isooctane to 11.76 parts, and further 7560 CROSSLINKER (methyl having trimethylsiloxy end) manufactured by Dow Corning as a crosslinking agent.
- a release control agent was prepared by diluting the fluorosilicone 1 obtained in Synthesis Example 1 with isooctane to a solid content of 10%, and the fluorosilicone 1 was 0 with respect to 11.76 parts of Q2-7785 RELEASE COATING.
- a silicone release agent composition was prepared by adding and mixing so as to be 5 parts.
- Example 2 A silicone release agent composition was prepared in the same manner as in Example 1 except that the fluorosilicone 2 obtained in Synthesis Example 2 was added instead of the fluorosilicone 1 as a release control agent.
- Example 3 As a release control agent, the same as Example 1 except that the fluorosilicone 1 obtained in Synthesis Example 1 was added to 11.76 parts of Q2-7785 RELEASE COATING so that the fluorosilicone 1 would be 2.0 parts.
- the silicone release agent composition was prepared by the method.
- Example 1 A silicone release agent composition was prepared in the same manner as in Example 1 except that the fluorosilicone 3 obtained in Synthesis Example 3 was added in place of the fluorosilicone 1 as a release control agent.
- Example 2 A silicone release agent composition was prepared in the same manner as in Example 1 except that the fluorosilicone 4 obtained in Synthesis Example 4 was added instead of the fluorosilicone 1 as a release control agent.
- Example 5 A silicone release agent composition was prepared in the same manner as in Example 1 except that no component corresponding to the release control agent was added.
- the content of fluorine atom-containing organic groups in the organopolysiloxane as a release control agent is within the range of 15 to 29 mol%, and does not have alkenyl groups and silicon-bonded hydrogen atoms (implementation).
- the content of the fluorine atom-containing organic group of the organopolysiloxane is not within the above range (Comparative Example 1 and Comparative Example 2). Also achieved light peeling.
- Comparative Example 5 is a control experiment that does not contain a release control agent, and the release control agents according to the present invention (Examples 1 to 3) are adhesive in any of the sample preparation conditions 1 to 3. It was confirmed that the peel strength against the agent was significantly reduced.
- the release control agent of the present invention can be suitably used for a silicone release agent composition, a release sheet comprising a cured layer made of the cured product, and a laminate comprising the release sheet and an adhesive layer.
- a silicone release agent composition a release sheet comprising a cured layer made of the cured product
- a laminate comprising the release sheet and an adhesive layer.
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Abstract
Description
(A)1分子中に、少なくとも1個のフッ素原子含有有機基と少なくとも2個のアルケニル基を有するオルガノポリシロキサン、
(B)1分子中に、少なくとも2個のケイ素原子結合水素原子を有するオルガノ水素ポリシロキサン、
(C)本発明の剥離コントロール剤、及び
(D)ヒドロシリル化反応触媒
を含む、シリコーン剥離剤組成物にも関する。
(A)1分子中に、少なくとも1個のフッ素原子含有有機基と少なくとも2個のアルケニル基を有するオルガノポリシロキサン、
(B)1分子中に、少なくとも2個のケイ素原子結合水素原子を有するオルガノ水素ポリシロキサン、
(C)本発明の剥離コントロール剤、及び
(D)ヒドロシリル化反応触媒
を含む、シリコーン剥離剤組成物にも関する。
反応器に(MeC6F9H4SiO)3を57.74部、(Me2SiO)4を42.03部、(Me3SiO1/2)2を0.24部、及びトリフルオロメタンスルホン酸を0.017部加えて撹拌混合し、60℃で6時間重合した。重合後、混合物を40℃に冷却し、炭酸水素ナトリウムを5.6部加えて中和し、1時間撹拌を続けた。その後、撹拌を停止し、反応物を一晩放置して室温に冷却した。冷却した反応物を濾過してトリフルオロメタンスルホン酸と炭酸水素ナトリウムの中和塩を除去し、N2フロー下、160℃、フルバキュームで2時間ストリッピングを行った。その結果、以下の平均分子式を有するフロロシリコーンを得た。
(Me3SiO1/2)0.86(HOMe2SiO1/2)1.14(MeC6F9H4SiO)374(Me2SiO)1053
反応器に(MeC6F9H4SiO)3を50.69部、(Me2SiO)4を49.20部、(Me3SiO1/2)2を0.11部、及びトリフルオロメタンスルホン酸を0.017部加えて撹拌混合し、60℃で6時間重合した。重合後、混合物を40℃に冷却し、炭酸水素ナトリウムを5.6部加えて中和し、1時間撹拌を続けた。その後、撹拌を停止し、反応物を一晩放置して室温に冷却した。冷却した反応物を濾過してトリフルオロメタンスルホン酸と炭酸水素ナトリウムの中和塩を除去し、N2フロー下、160℃、フルバキュームで2時間ストリッピングを行った。その結果、以下の平均分子式を有するフロロシリコーンを得た。
(Me3SiO1/2)1.25(HOMe2SiO1/2)0.75(MeC6F9H4SiO)256(Me2SiO)992
反応器に(MeC6F9H4SiO)3を63.79部、(Me2SiO)4を36.11部、(Me3SiO1/2)2を0.09部、及びトリフルオロメタンスルホン酸を0.017部加えて撹拌混合し、60℃で6時間重合した。重合後、混合物を40℃に冷却し、炭酸水素ナトリウムを5.6部加えて中和し、1時間撹拌を続けた。その後、撹拌を停止し、反応物を一晩放置して室温に冷却した。冷却した反応物を濾過してトリフルオロメタンスルホン酸と炭酸水素ナトリウムの中和塩を除去し、N2フロー下、160℃、フルバキュームで2時間ストリッピングを行った。その結果、以下の平均分子式を有するフロロシリコーンを得た。
(Me3SiO1/2)1.27(HOMe2SiO1/2)0.73(MeC6F9H4SiO)619(Me2SiO)1379
反応器に(MeC6F9H4SiO)3を37.01部、(Me2SiO)4を62.86部、(Me3SiO1/2)2を0.13部、及びトリフルオロメタンスルホン酸を0.017部加えて撹拌混合し、60℃で6時間重合した。重合後、混合物を40℃に冷却し、炭酸水素ナトリウムを5.6部加えて中和し、1時間撹拌を続けた。その後、撹拌を停止し、反応物を一晩放置して室温に冷却した。冷却した反応物を濾過してトリフルオロメタンスルホン酸と炭酸水素ナトリウムの中和塩を除去し、N2フロー下、160℃、フルバキュームで2時間ストリッピングを行った。その結果、以下の平均分子式を有するフロロシリコーンを得た。
(Me3SiO1/2)1.08(HOMe2SiO1/2)0.92(MeC6F9H4SiO)210(Me2SiO)1326
反応器に(MeC6F9H4SiO)3を57.74部、(Me2SiO)4を42.03部、(ViMe2SiO1/2)2を0.24部、及びトリフルオロメタンスルホン酸を0.0017部加えて撹拌混合し、60℃で6時間重合した。重合後、混合物を40℃に冷却し、炭酸水素ナトリウムを5.6部加えて中和し、1時間撹拌を続けた。その後、撹拌を停止し、反応物を一晩放置して室温に冷却した。冷却した反応物を濾過してトリフルオロメタンスルホン酸と炭酸水素ナトリウムの中和塩を除去し、N2フロー下、160℃、フルバキュームで2時間ストリッピングを行った。その結果、以下の平均分子式を有するフロロシリコーンを得た。
(ViMe2SiO1/2)1.65(HOMe2SiO1/2)0.35(MeC6F9H4SiO)146(Me2SiO)439
(シリコーン粘着剤調製)
東レ・ダウコーニング社製付加硬化型シリコーン粘着剤SD4580FC 100部にトルエン50部を加えて希釈し、更に、架橋剤として東レ・ダウコーニング社製 BY24-741 CROSSLINKER 1部、及び白金触媒として東レ・ダウコーニング社製NC-25 CATALYST 0.9部を添加して、十分攪拌した。
シリコーン剥離剤組成物をマイヤーバー#10を用いてポリエチレンテレフタレート樹脂フィルムの基材表面に塗工量が約1g/m2になるように塗布し、150℃の熱風循環式オーブン中で40秒加熱して剥離シートを作成した。
続いて、この剥離シート上に、下記1~3のいずれかの条件で粘着層を形成し、ポリエチレンテレフタレート樹脂フィルムと貼り合わせて積層体を作成した。この積層体を2.5cm幅に切断して試験片を作成し、引っ張り試験機を用いて、シリコーン剥離剤組成物が塗布された方のフィルムを180°の角度で剥離速度0.3m/分で剥離して、剥離に要する力[gf/in]を測定した。
150℃の熱風循環式オーブンで40秒加熱して得られた剥離シートを、オーブンから取り出してから1日、室温でそのまま静置した。その後、剥離剤塗工面上に、粘着剤を硬化後の粘着剤の塗布厚が100μmになるように塗布した。室温で150秒静置した後、180℃のオーブン内で150秒硬化させた。得られた粘着シートをオーブンから取り出し、ポリエチレンテレフタレート樹脂フィルムに2kgfのハンドローラーで貼り合わせ、20g/cm2の荷重下、室温で30分エージングした。
150℃の熱風循環式オーブンで40秒加熱して得られた剥離シートを、オーブンから取り出した後、剥離剤塗工面上に、粘着剤を硬化後の粘着剤の塗布厚が100μmになるように塗布した。室温で150秒静置した後、180℃のオーブン内で150秒硬化させた。得られた粘着シートをオーブンから取り出し、ポリエチレンテレフタレート樹脂フィルムに2kgfのハンドローラーで貼り合わせ、100kg/cm2の荷重下、室温で1日エージングした。
150℃の熱風循環式オーブンで40秒加熱して得られた剥離シートを、オーブンから取り出した後、ポリエチレンテレフタレート樹脂フィルムとハンドローラーを用いて重ね合わせ、100kg/cm2の荷重下、室温で1日エージングした。その後、ポリエチレンテレフタレート樹脂フィルムを剥がし、剥離シートの剥離剤塗布面上に、粘着剤を硬化後の粘着剤の塗布厚が100μmになるように塗布した。室温で150秒静置した後、180℃のオーブン内で150秒硬化させた。得られた粘着シートをオーブンから取り出し、新たに別のポリエチレンテレフタレート樹脂フィルムに2kgfのハンドローラーで貼り合わせ、20g/cm2の荷重下、室温で30分エージングした。
上記評価用積層体サンプル作成条件1で作製し、上記剥離抵抗を測定した後の試験片を、鏡面ステンレス板に2kgのハンドローラーを用いて貼り付け、室温で30分静置した。次いで、その試験片を180°の角度で剥離速度0.3m/分の条件下で剥離して、剥離に要する力(F1)[gf/in]を測定した。
また、上記とは別に、ポリエチレンテレフタレート樹脂フィルムに、粘着剤を硬化後の粘着剤の塗布厚が100μmになるように塗布した。塗布物を室温で150秒静置した後、180℃のオーブン内で150秒硬化させた。その後、硬化物を室温で1日放置した後、2.5cm幅に切断して試験片を作製した。この試験片を鏡面ステンレス板に2kgのハンドローラーを用いて貼り付け、室温で30分静置した。次いで、その試験片を180°の角度で剥離速度0.3m/分の条件下で剥離して、剥離に要する力(F2)[gf/in]を測定した。残留接着率((F1)/(F2))×100[%]を求めた。
ダウ・コーニング社製の付加硬化型シリコーン粘着剤用剥離剤Q2-7785 RELEASE COATING(フッ素原子含有有機基と2個以上のアルケニル基を有するオルガノポリシロキサン、微量の白金触媒、溶剤の混合物。固形分85%)11.76部にイソオクタン88.24部を加えて希釈し、更に架橋剤としてダウ・コーニング社製の7560 CROSSLINKER(トリメチルシロキシ末端を有するメチル(パーフロロブチルエチル)・メチルハイドロジェンシロキサン共重合体)を0.4部加えた。剥離コントロール剤として、合成例1で得られたフロロシリコーン1をイソオクタンで固形分が10%となるよう希釈したものを調製し、Q2-7785 RELEASE COATING11.76部に対して、フロロシリコーン1が0.5部となるように加えて混合し、シリコーン剥離剤組成物を調製した。
剥離コントロール剤として、合成例2で得られたフロロシリコーン2をフロロシリコーン1の代わりに加えた以外は実施例1と同様の方法でシリコーン剥離剤組成物を調製した。
剥離コントロール剤として、合成例1で得られたフロロシリコーン1を、Q2-7785 RELEASE COATING11.76部に対して、フロロシリコーン1が2.0部となるように加えた以外は実施例1と同様の方法でシリコーン剥離剤組成物を調製した。
剥離コントロール剤として、合成例3で得られたフロロシリコーン3をフロロシリコーン1の代わりに加えた以外は実施例1と同様の方法でシリコーン剥離剤組成物を調製した。
剥離コントロール剤として、合成例4で得られたフロロシリコーン4をフロロシリコーン1の代わりに加えた以外は実施例1と同様の方法でシリコーン剥離剤組成物を調製した。
剥離コントロール剤として、合成例5で得られたフロロシリコーン5(ビニル基含有量0.04質量%)をフロロシリコーン1の代わりに加えた以外は実施例1と同様の方法でシリコーン剥離剤組成物を調製した。
剥離コントロール剤として、以下の平均分子式:
(ViMe2SiO1/2)1(Me3SiO1/2)1(MeC6F9H4SiO)36.2(Me2SiO)108.6
を有するフロロシリコーン6(ビニル基含有量0.14質量%)をフロロシリコーン1の代わりに加えた以外は実施例1と同様の方法でシリコーン剥離剤組成物を調製した。
剥離コントロール剤に相当する成分を添加しない以外は、実施例1と同様の方法でシリコーン剥離剤組成物を調製した。
(*2)Q2-7785 RELEASE COATING11.76部に対する剥離コントロール剤の添加部数である。Q2-7785は、固形分濃度が85%なので、固形分100質量部に換算すると、表中の添加量(0.5部、2.0部)は5.0部、20.0部に相当する。
Claims (11)
- 1分子中に15~29モル%のフッ素原子含有有機基を有し、且つヒドロシリル化反応性基を含有しないオルガノポリシロキサンを含む、剥離コントロール剤。
- 前記ヒドロシリル化反応性基がアルケニル基である、請求項1の記載の剥離コントロール剤。
- 前記オルガノポリシロキサンの分子鎖末端の1つ以上がトリメチルシリル基である、請求項1に記載の剥離コントロール剤。
- 前記フッ素原子含有有機基が、CnF2n+1-R-、CnF2n+1-R-O-R-、又はF(CF(CF3)CF2O)nCF(CF3)-R-O-R-(式中、Rは、それぞれ独立に二価の炭化水素基であり、nは1~20の整数である)で表される基である、請求項1に記載の剥離コントロール剤。
- 前記オルガノポリシロキサンの重合度が、100~10,000である、請求項1~4のいずれか一項に記載の剥離コントロール剤。
- (A)1分子中に、少なくとも1個のフッ素原子含有有機基と少なくとも2個のアルケニル基を有するオルガノポリシロキサン、
(B)1分子中に、少なくとも2個のケイ素原子結合水素原子を有するオルガノ水素ポリシロキサン、
(C)請求項1~5のいずれか一項に記載の剥離コントロール剤、及び
(D)ヒドロシリル化反応触媒
を含む、シリコーン剥離剤組成物。 - 前記(B)成分の含有量が、前記(A)成分100質量部に対して0.1~40質量部である、請求項6に記載のシリコーン剥離剤組成物。
- 前記(C)成分の含有量が、前記(A)成分100質量部に対して0.01~20質量部である、請求項6又は7に記載のシリコーン剥離剤組成物。
- 請求項6~8のいずれか一項に記載のシリコーン剥離剤組成物の硬化物からなる硬化層、及び、シート状基材を備える剥離シート。
- 前記シート状基材が、紙、プラスチックフィルム又は布である、請求項9に記載の剥離シート。
- 請求項9又は10に記載の剥離シート及び粘着層を備える積層体。
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CN106574168B (zh) | 2019-09-10 |
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KR102502787B1 (ko) | 2023-02-24 |
KR20170029585A (ko) | 2017-03-15 |
EP3168275A4 (en) | 2018-03-07 |
CN106574168A (zh) | 2017-04-19 |
JPWO2016006252A1 (ja) | 2017-04-27 |
US10494484B2 (en) | 2019-12-03 |
US20170190939A1 (en) | 2017-07-06 |
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