HEAT RESISTANT HYDROCARBON ELASTOMER COMPOSITIONS

摘要

Disclosed herein is a polyamide-filled curable hydrocarbon elastomer compositions having enhanced heat aging performance where the presence of conventional filler, such as carbon black or silica, does not detract from desired heat stability properties. Also disclosed are polyamide-filled curable hydrocarbon elastomer compositions where the use of compatibilzer is optional, for polyamides having an inherent viscosity of greater than 0.88 dL/g.

主权项

1. A curable polyamide-reinforced ethylene elastomer compound consisting essentially of
(a) a polymer blend prepared from
(i) 40 wt. % to 95 wt. % of an ethylene copolymer elastomer gum; and one of(iia) 5 wt. % to 60 wt. % of a polyamide having a melting peak temperature greater than 160° C. and an inherent viscosity greater than about 0.88 dL/g; or(iib) 5 wt. % to 60 wt. % of a polyamide having a melting peak temperature greater than 160° C. and an effective amount of compatibilizer;
wherein the weight percentages of the ethylene copolymer elastomer gum and polyamide are based on the combined weight of ethylene copolymer elastomer gum and polyamide, and the blend exhibits a Mooney viscosity (ML1+4, 125° C.) less than 200; and (b) a curative; and (c) optionally, reinforcing filler, with the proviso that any reinforcing filler present contributes less than about 25 points Shore A hardness to the compound after press curing.