Rtv silicone compositions using aminohydrocarbyl-substituted...

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 83/04 (2006.01) C08K 5/54 (2006.01) C08K 5/5465 (2006.01)

Patent

CA 2189665

A room temperature vulcanizable silicone rubber composition with crack resistant properties with movement during cure, comprising a silanol end-stopped diorganopolysiloxane polymer, a methyl tris- (methyl ethyl ketoximino) silane crosslinker, an aminohydrocarbyl substituted ketoximinosilane adhesion promoter; a reinforcing or non-reinforcing filler or filler mixture, and an optional catalyst and plasticizer. These compositions cure to elastic materials useful as caulking materials, adhesives, coatings and encapsulating materials for the construction and other industries.

L'invention concerne des compositions pour des caoutchoucs de silicone vulcanisables à la température ambiante avec une bonne résistance au fendillement en cas de mouvement pendant la vulcanisation, comprenant un polymère diorganopolysiloxane se terminant par un silanol, un tris(méthyléthylcétoximino)méthylsilane comme agent de réticulation, un cétoximinosilane substitué avec un aminohydrocarbyle comme promoteur d'adhésion, une charge ou un mélange de charges servant ou non d'agent de renforcement, et éventuellement un catalyseur et un plastifiant. Ces compositions durcissent pour former des matériaux élastiques utiles comme matériaux d'étanchement, adhésifs, revêtements et matériaux d'enrobage pour la construction et pour d'autres industries.

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