Patent ID: 7081503

Claim:
A curable composition comprising three components (A), (B), and (C): (A) an alkenyl-terminated vinyl polymer which is produced by a production process comprising introducing an alkenyl group represented by general formula (3): (wherein R 3 is a hydrogen atom or hydrocarbon group of 1 to 20 carbon atoms that may contain an ether bond or ester bond), into a vinyl polymer having a thiocarbonylthio structure selected from the group consisting of a vinyl polymer represented by general formula (1): (wherein R 1 is a polyvalent organic group (p>1) which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, silicon atom, phosphorus atom, and metal atom, and may be a polymer, or R 1 may be a hydrogen atom or halogen atom for p=1; Z 1 is a hydrogen atom, halogen atom, or monovalent organic group which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, silicon atom, and phosphorus atom, and may be a polymer; X is a hydrogen atom, halogen atom, or monovalent organic group which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, and silicon atom; Y is a hydrogen atom, halogen atom, or monovalent organic group which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, and silicon atom: p is an integer of 1 or more; l is an integer of 5 or more; and when plural X's, Y's, and Z 1 's are present, the plural X's, Y's, and Z 1 's may be each the same or different), and a vinyl polymer represented by general formula (2): (wherein R 2 is a hydrogen atom, halogen atom, or monovalent organic group which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, silicon atom, phosphorus atom, and metal atom, and may be a polymer; Z 2 is a sulfur atom (when q=2), oxygen atom (when q=2), nitrogen atom (when q=3), or polyvalent organic group which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, silicon atom, and phosphorus atom, and may be a polymer; X is a hydrogen atom, halogen atom, or monovalent organic group which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, and silicon atom; Y is a hydrogen atom, halogen atom, or monovalent organic group which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, and silicon atom; q is an integer of 2 or more; m is an integer of 5 or more, and plural X's, Y's, and R 2 's may be each the same or different); (B) a hydrogen-silicon bond-containing compound; and (C) a hydrosilylation catalyst.