Patent JPS53148918A successfully refreshed from Google Patents.
EP0400614A2
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Organopolysiloxane composition for the formation of a peelable cured coating
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1990-05-30
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Granted: —
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Expires: 2010-05-30
Abstract
Abstract This invention concerns a type of organopolysiloxane composition for the formation of a peelable cured coating with a high curing rate at a low temperature and a stable releasing property for adhesive substances. The cured coating has a medium releasing property suitable releasing property required by engineering paper, asphalt package paper, tapes, labels, etc. The curable composition contains an organopolysiloxane containing two or more higher alkenyl groups, an organohydrogenpolysiloxane which contains two or more silicon-bonded hydrogen atoms and an organopolysiloxane resin which contains at least two higher alkenyl groups.
Inventors
- 👤 Hiroshi Masaoka
- 👤 Shosaku Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 06:39
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C09; C09D; C09D183/00; C09D183/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/16; C08G77/20; C08G77/22; C08G77/24; C08G77/42; C08G77/44
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
174 words
An organopolysiloxane composition for the formation of a peelable cured coating characterized by the fact that it comprises the following components: (A) 100 parts by weight of organopolysiloxane, the average molecule of which contains two or more higher alkenyl groups represented by the formula H₂C=CH-(CH₂) a -, where a has a value of from 2 to 8; (B) 0.3-40 parts by weight of organohydrogenpolysiloxane polysiloxane, the average molecule of which contains two or more silicon-bonded hydrogen atoms; (C) 2-200 parts by weight of an organopolysiloxane resin which is soluble in an organic solvent and consists of R₃SiO 1/2 units, R₂SiO 2/2 units or RSiO 3/2 units and SiO₄₁₂ units, where R represents a monovalent hydrocarbon group, with each molecule having at least two alkenyl groups represented by the formula H₂C=CH-(CH₂) a -, where a has a value of from 2 to 8; (D) 0.001-5 parts by weight of an addition reaction inhibitor; (E) a platinum-family compound in an amount suitable for catalysis of an addition reaction; and (F) any amount of an organic solvent.
Claim 2
Dependent Claim
174 words
An organopolysiloxane composition for the formation of a peelable cured coating characterized by the fact that it comprises the following components: (A) 100 parts by weight of organopolysiloxane, the average molecule of which contains two or more higher alkenyl groups represented by the formula H₂C=CH-(CH₂) a -, where a has a value of from 2 to 8; (B) 0.3-40 parts by weight of organohydrogenpolysiloxane polysiloxane, the average molecule of which contains two or more silicon-bonded hydrogen atoms; (C) 2-200 parts by weight of an organopolysiloxane resin which is soluble in an organic solvent and consists of R₃SiO 1/2 units, R₂SiO 2/2 units or RSiO 3/2 units and SiO₄₁₂ units, where R represents a monovalent hydrocarbon group, with each molecule having at least two alkenyl groups represented by the formula H₂C=CH-(CH₂) a -, where a has a value of from 2 to 8; (D) 0.001-5 parts by weight of an addition reaction inhibitor; (E) a platinum-family compound in an amount suitable for catalysis of an addition reaction; and (F) any amount of an organic solvent.
Claim 3
Dependent Claim
74 words
A composition according to claim 1 wherein component (A) has the average unit formula R′ b SiO (4-b)/2 , wherein each R′ represents a monovalent hydrocarbon or halogenated hydrocarbon group, at least two of which are higher alkenyl groups represented by the formula H₂C=CH-(CH₂) a -, where a has a value of from 2 to 8; at least 70 mol% of R′ are methyl groups; and b is a number from 1.9 to 2.05.
Claim 4
Dependent Claim
24 words
A composition according to claim 1 wherein component (A) is a raw-rubber-like material having a plasticity, as defined in JISC 2123, higher than 100.
Claim 5
Dependent Claim
31 words
A composition according to claim 1 wherein component (C) has a molar ratio of R₃SiO 1/2 units to R₂SiO 2/2 units and/or RSiO 3/2 units to SiO 4/2 units of 0.1-1.5:0.1-1.0:1.0.
Claim 6
Dependent Claim
23 words
A composition according to claim 4 wherein component (C) consists of {H₂C=CH(CH₂) a }(CH₃)₂SiO 1/2 units, CH₃SiO 3/2 units and SiO 4/2 units.
Claim 7
Dependent Claim
22 words
A composition according to claim 1 wherein component (C) has been treated with a triorganosilylating agent to reduce its silanol group content.
Claim 8
Dependent Claim
60 words
An organopolysiloxane resin which is soluble in an organic solvent and consists of R₃SiO 1/2 units, R₂SiO 2/2 units and/or RSiO 3/2 units and SiO 4/2 units, where R represents a monovalent hydrocarbon group, with each molecule having at least two alkenyl groups represented by the formula H₂C=CH(CH₂) a -, where a has a value of from 2 to 8.
Claim 9
Dependent Claim
60 words
An organopolysiloxane resin which is soluble in an organic solvent and consists of R₃SiO 1/2 units, R₂SiO 2/2 units and/or RSiO 3/2 units and SiO 4/2 units, where R represents a monovalent hydrocarbon group, with each molecule having at least two alkenyl groups represented by the formula H₂C=CH(CH₂) a -, where a has a value of from 2 to 8.
Claim 10
Dependent Claim
31 words
An organopolysiloxane resin according to claim 7 wherein the molar ratio of R₃SiO 1/2 units to R₂SiO 2/2 units and/or RSiO3/2 units to SiO 4/2 units has a value of 0.1-1.5:0.1-1.0:1.0.
Claim 11
Dependent Claim
22 words
An organopolysiloxane resin according to claim 8 which consists of {H₂C=CH(CH₂) a }(CH₃)₂SiO 1/2 units, CH₃SiO 3/2 units and SiO 4/2 units.
Claim 12
Dependent Claim
21 words
An organopolysiloxane resin according to claim 7 which has been treated with a triorganosilylating agent to reduce its silanol group content.
References Cited (Backward Citations)
No citation records indexed.
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