abstract |
PURPOSE: A primer composition suitable for use in bonding a silicone rubber to a base material such as a metal, which comprises a specified org. silicon compd. and an org. titanate ester. n CONSTITUTION: 100pts.wt. org. polysiloxane consisting of a unit of formulaI (wherein R 1 is a monovalent hydrocarbon group; a is 0.4W1.8), 5W500pts.wt. org. silicon compd. consisting of a unit of formula II (wherein R 2 is a monovalent hydrocarbon group; R 3 is a monovalent hydrocarbon group having an addition reactivity; R 4 is alkyl; b and c are 0W3; d is 2W4), 2W100pts.wt. org. titanate ester such as tetraisopropyl titanate, and at least 0.5pts.wt. organo- hydrogenpolysiloxane consisting of a unit of formula III (wherein R 6 is a monovalent hydrocarbon group; f is 0W3; g is 0W2) are compounded. n COPYRIGHT: (C)1982,JPO&Japio |