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EP0345645A2
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Room temperature-curable organopolysiloxane composition
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1989-06-01
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Granted: —
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Expires: 2009-06-01
Abstract
Abstract Room temperature-curable compositions made from an organopolysiloxane having at least two silicon-bonded alkoxy groups per molecule, an alkoxysilane having three or four alkoxy groups per molecule, a mercapto group-containing alkoxysilane, and a curing catalyst produce cured materials under sealed storage stability, reversion resistance.
Inventors
- 👤 Masayuki Onishi
- 👤 Miyoji Fukayama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 11:59
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08K5/5406
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
128 words
A room temperature-curable organopolysiloxane composition comprising (A) 100 weight parts organopolysiloxane having at least 2 silicon-bonded alkoxy groups in each molecule and having a viscosity of 20 to 1,000,000 centipoise at 25°C, (B) 0.5 to 15 weight parts organosilane represented by the general formula R¹ a Si(OR²) 4-a wherein R¹ is a monovalent hydrocarbon group, R² is a monovalent hydrocarbon group or alkoxy-substituted hydrocarbon group, and a is zero or one, or a partial hydrolysis condensate thereof, (C) 0.01 to 15 weight parts mercapto group-containing alkoxysilane represented by the general formula wherein R³ is a divalent organic group, R⁴ and R⁵ are substituted or unsubstituted monovalent hydrocarbon groups, and b is zero or one, or partial hydrolysis condensate thereof, and (D) 0.01 to 10 weight parts curing catalyst.
Claim 2
Dependent Claim
128 words
A room temperature-curable organopolysiloxane composition comprising (A) 100 weight parts organopolysiloxane having at least 2 silicon-bonded alkoxy groups in each molecule and having a viscosity of 20 to 1,000,000 centipoise at 25°C, (B) 0.5 to 15 weight parts organosilane represented by the general formula R¹ a Si(OR²) 4-a wherein R¹ is a monovalent hydrocarbon group, R² is a monovalent hydrocarbon group or alkoxy-substituted hydrocarbon group, and a is zero or one, or a partial hydrolysis condensate thereof, (C) 0.01 to 15 weight parts mercapto group-containing alkoxysilane represented by the general formula wherein R³ is a divalent organic group, R⁴ and R⁵ are substituted or unsubstituted monovalent hydrocarbon groups, and b is zero or one, or partial hydrolysis condensate thereof, and (D) 0.01 to 10 weight parts curing catalyst.
Claim 3
Dependent Claim
82 words
The room temperature-curable organopolysiloxane composition according to claim 1 in which the organopolysiloxane as represented by the general structure wherein R⁶ is a monovalent hydrocarbon group; R⁷ is a monovalent hydrocarbon group or alkoxy-substituted hydrocarbon group; R⁸ is a group selected from the group consisting of monovalent hydrocarbon groups, halogenated hydrocarbon groups, and cyanoalkyl groups; Y is an oxygen atom; c is two or three; and n is a positive number which gives a viscosity of 100 to 500,000 centipoise at 25°C.
Claim 4
Dependent Claim
19 words
The room temperature-curable organopolysiloxane composition according to claim 2 in which the mercapto group-containing alkoxysilane is gamma-mercaptopropyltrimethoxysilane or (gamma-mercaptopropyl)methyldimethoxysilane.
References Cited (Backward Citations)
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