Stabilization of halogenated rubber

Details Stabilization of halogenated rubber Stabilization of halogenated rubber

C - Chemistry, Metallurgy

08

K

C08K 3/20 (2006.01) C08K 3/22 (2006.01) C08K 3/26 (2006.01) C08K 5/00 (2006.01) C08L 15/02 (2006.01)

Patent

CA 2279533

Halogenated rubbery 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.

Cette invention concerne la stabilisation de polymères caoutchouteux halogénés, vis à vis de la décoloration, avec une base faible, par exemple 100 à 500 ppm de bicarbonate de sodium. On ajoute l'additif aux polymères caoutchouteux après déshydratation au cours de la dernière étape de leur fabrication. Le durcissement complet des caoutchoucs stabilisés n'est pas affecté négativement par l'additif de bicarbonate de sodium.

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