Patent ID: 6160074
Filing Date: 2000-12-12
Classification: C08G

Abstract:
A fluorine-containing curable composition comprising(A) a linear perfluoro compound of the following formula (3) having at least two alkenyl groups in a molecule, a divalent perfluoroalkylene or perfluoropolyether structure in a backbone, and a viscosity of 25 to 1,000,000 centistokes at 25.degree. C.,CH.sub.2 .dbd.CH--(X).sub.p --Rf--Q).sub.a --Rf--(X).sub.p --CH.dbd.CH.sub.2 ( 3)wherein Rf is a divalent perfluoroalkylene or perfluoropolyether group,X is independently selected from the group consisting of --CH.sub.2 --, --CH.sub.2 O--, --CH.sub.2 OCH.sub.2 --, --Y--NR.sup.1' --SO.sub.2 -- and --Y--NR.sup.1' --CO-- wherein Y is --CH.sub.2 -- or ##STR22## wherein R.sup.1' is a methyl or phenyl group, letter p is independently equal to 0 or 1, letter a is 0 or a positive integer, andQ is a group of the following formulae (4), (5) or (6): ##STR23## wherein X, p and R.sup.1' are as defined above, R.sup.3 is a substituted or unsubstituted divalent hydrocarbon group, R.sup.4 is a substituted or unsubstituted divalent hydrocarbon group which may have at least one intervening atom selected from oxygen, nitrogen, silicon, and sulfur atoms in its linkage or a group of the following formulae (7) or (8): ##STR24## wherein R.sup.5 is a substituted or unsubstituted monovalent hydrocarbon group and R.sup.6 is a group containing at least one atom selected from carbon, oxygen, nitrogen, silicon, and sulfur atoms in its backbone structure, and letter a is 0 or a positive integer,(B) a fluorinated organic silicon compound of the following formula (1) having a viscosity of 10 to 5,000 centistokes at 25.degree. C.,Z--CH.sub.2 CH.sub.2 --(X).sub.p --Rf--(X).sub.p --CH.sub.2 CH.sub.2 --Z (1)wherein Rf, X and p are as defined above, andZ is a group of the following formula (2): ##STR25## wherein R.sup.2 is substituted or unsubstituted monovalent hydrocarbon group and letter b is equal to 2 or 3, component (B) being blended in such an amount as to give 0.5 to 5 mol of hydrosilyl group per mol of alkenyl group in component (A), and(C) a catalytic amount of a platinum group metal compound.