Radiation-curable silicone rubber composition
AssigneeShin-Etsu Chemical Co., Ltd.
InventorTsutomu Kashiwagi
Life of this patent
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Abstract
Provided is a radiation-curable silicone rubber composition comprising: (A) a specific organopolysiloxane, which at each molecular chain terminal contains two or three silicon-containing groups that each contain a plurality of (from 2 to 9) (meth)acryloyl groups (in other words, a specific organopolysiloxane containing from 8 to 54 (meth)acryloyl groups within each molecule); and (B) a radiation sensitizer. The composition cures easily and favorably upon irradiation with low intensity, low energy radiation, and in particular upon irradiation with ultraviolet light emitted from a UV-LED light source. A cured coating generated from the composition rapidly develops favorable adhesion to a wide variety of substrates, and provides excellent corrosion prevention for the substrate, even under severe conditions.
Claims16
A radiation-curable silicone rubber composition, comprising
- (A) an organopolysiloxane represented by a general formula (1) shown below:
- wherein, each R1 represents, independently, an unsubstituted or substituted monovalent hydrocarbon group of 1 to 9 carbon atoms, each X represents, independently, a group represented by a general formula (2) shown below:
- wherein, R2 represents a bivalent hydrocarbon group of 2 to 4 carbon atoms or an oxygen atom, each R3 represents, independently, a monovalent organic group of 4 to 25 carbon atoms that contains from 1 to 3 (meth)acryloyl groups represented by a general formula shown below:
- wherein, R represents a hydrogen atom or a methyl group, each R4 represents, independently, an unsubstituted or substituted monovalent hydrocarbon group of 1 to 9 carbon atoms, each R5 represents, independently, a monovalent hydrocarbon group of 1 to 18 carbon atoms, n represents an integer from 1 to 3, m represents an integer from 0 to 2, and n+m represents an integer from 1 to 3, although when n=1, said R3 contains from 2 to 3 (meth)acryloyl groups, each Y represents, independently, a group represented by X, R1 or OR1 wherein, X and R1 are as defined above, and N represents an integer from 8 to 10,000, and
- (B) a radiation sensitizer.
Dependencies are inferred from the claim text.