Stabilized halogenated butyl rubber

Details Stabilized halogenated butyl rubber Stabilized halogenated butyl rubber

C - Chemistry, Metallurgy

08

K

400/9158

C08K 3/22 (2006.01) C08K 5/06 (2006.01) C08K 5/09 (2006.01) C08K 5/098 (2006.01) C08L 15/00 (2006.01)

Patent

CA 1116778

U.S. 892,645 ABSTRACT OF THE DISCLOSURE A stabilized halogenated butyl rubber composition comprises halogenated butyl rubber, an alkali metal or alkaline earth metal carboxylate, an ether and an oxide or hydroxide of a Group IIA metal as exemplified by halogenated butyl rubber containing both bromine and chlorine stabilized with a composition comprising calcium stearate, polyethoxylated adducts of sorbitol esterified with from 1 to 6 moles of oleic acid and mixtures thereof, and calcium hydroxide. Halogenated butyl rubbers stabilized in the manner disclosed exhibit im- proved rsistance to discoloration upon high temperature exposure, such as during the drying of polymers in the course of manufacture.

323335

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