Method for producing molded silicone rubber products using...

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 83/05 (2006.01) C08L 83/04 (2006.01) C08L 83/07 (2006.01)

Patent

CA 2758239

Described is a method for producing a molded silicone rubber product using a liquid silicone rubber (LSR) base comprising at least one vinyl siloxane polymer, at least one hydride crosslinker, and optionally at least one injection molding inhibitor. The single LSR base is fed into a feed line, and into the feed line are fed an inhibitor master batch comprising at least one liquid injection molding inhibitor and at least one vinyl siloxane polymer, and a catalyst master batch comprising at least one catalyst and at least one vinyl siloxane polymer. The invention is further directed to: said LSR base; said inhibitor master batch; said catalyst master batch; and a molded silicone rubber article produced by the methods and compositions described herein.

L'invention concerne un procédé pour produire un produit de caoutchouc de silicone moulé en utilisant une base de caoutchouc de silicone liquide (LSR) comprenant au moins un polymère de siloxane vinylique, au moins un agent de réticulation d'hydrure, et éventuellement au moins un inhibiteur de moulage par injection. La base de LSR unique est introduite dans une ligne d'alimentation, et dans la ligne d'alimentation sont introduits un mélange maître d'inhibiteur comprenant au moins un inhibiteur de moulage par injection liquide et au moins un polymère de siloxane vinylique, et un mélange maître de catalyseur, comprenant au moins un catalyseur et au moins un polymère de siloxane vinylique. L'invention concerne en outre : ladite base LSR ; ledit mélange maître inhibiteur ; ledit mélange maître de catalyseur ; et un article de caoutchouc de silicone moulé produit par les procédés et compositions décrits ici.

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