Curable composition

Abstract

Abstract PURPOSE:To provide a curable compsn. having excellent resistance to weather, water and heat, electrical insulating properties and gas barrier properties, consisting of an isobutylene polymer having a reactive silicone group at the terminal to its molecular chain. CONSTITUTION:An isobutylene polymer having at least one unsaturated bond of formula I (wherein R<1> is H, a 1-8C alkyl, an 8-20C aryl or a 7-20C aralkyl) at the terminal of its molecular chain and a hydrogenated silicone compd. of formula II [wherein R<2> and R<3> are each a 1-20C alkyl, a 6-20C aryl, a 7-20C aralkyl or a triorganosiloxy group of formula III (wherein R<1> is a 1-20C monovalent hydrocarbon group); X is hydroxyl or a hydrolyzable group and when two or more X groups exist, they may be the same groups; a is a number of 0-3; b is a number of 0-2; and m is a number of 0-18], are subjected to a hydrosilylating reaction in the presence of a catalyst such as H2PtCl5.6H2O, etc., at 0-150 deg.C to obtain a curable compsn. mainly composed of an isobutylene polymer having an MW of 500-30,000 and at least one reactive silicone group of formula IV at the terminal of its molecular chain.

Inventors

• 👤 Takanao Iwahara
• 👤 孝尚 岩原
• 👤 Koji Noda
• 👤 浩二 野田
• 👤 Katsuhiko Isayama
• 👤 諌山　克彦

Bibliographic Details