Process for the continuous manufacture of silicone gums

Details Process for the continuous manufacture of silicone gums Process for the continuous manufacture of silicone gums

C - Chemistry, Metallurgy

08

G

402/13

C08G 77/10 (2006.01) B01J 19/20 (2006.01) C08G 77/06 (2006.01)

Patent

CA 1240093

PROCESS FOR THE CONTINUOUS MANUFACTURE OF SILICONE GUMS ABSTRACT OF THE DISCLOSURE A process for the continuous polymerization of polydiorgano- siloxanes comprising: (a) mixing one or more cyclopolysiloxane monomers with one or more chainstopping agents, (b) preheating the mixture resulting from (a), (c) adding to the preheated mixture of (b) an amount of catalyst effective for catalyzing a polymerization reaction, (d) polymerizing the catalyzed mixture of (c) in a screw extruder having essentially plug flow therethrough, and (e) adding to the resulting polymer an amount of neutralizing agent effective for neutralizing said catalyst.

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