Chlorinated polyethylene elastomer composition having enhanced resistance to ozone-induced cracking.

摘要

Specific peroxide vulcanizable chlorinated polyethylene resin compositions can, after being press cured at a temperature of 204 DEG Centigrade for a period of ten minutes, withstand ozone-induced cracking for a period of 168 hours or more when elongated 60% and exposed to 200 parts of ozone per hundred million parts of air at a temperature of 40 DEG Centigrade. The compositions are characterized in that they contain 5 to 10% (based on the weight of chlorinated polyethylene resin) of triallyl cyanurate with the ratio of peroxide (0.5 to 2% based on the weight of chlorinated polyethylene resin and calculated as alpha , alpha min -bis(t-butylperoxy)-diisopropylbenzene) to triallyl cyanurate being 0.05 to 0.4.