Stabilization of halogenated rubber

Details Stabilization of halogenated rubber Stabilization of halogenated rubber

C - Chemistry, Metallurgy

08

K

C08K 3/00 (2006.01) C08F 8/20 (2006.01) C08K 3/22 (2006.01) C08K 3/26 (2006.01) C08L 23/28 (2006.01)

Patent

CA 2383342

Halogenated isobutylene-p-methylstyrene polymers are stabilized against discoloration with a weak base such as 100 to 500 ppm sodium bicarbonate. The additive is added to the rubbery polymers after dewatering in the finishing step of their manufacture. The curability of the stabilized rubbers is not adversely affected by the sodium bicarbonate additive.

L'invention concerne des polymères d'isobutylène-p-méthylstyrène halogénés stabilisés contre la décoloration au moyen d'une base faible, telle que 100 à 500 mg/l de bicarbonate de sodium. L'additif est ajouté aux polymères de caoutchouc suite au séchage au cours de l'étape finale de leur fabrication. Le traitement des caoutchoucs stabilisés n'est pas altéré par l'additif de bicarbonate de sodium.

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