초록 ▼

This invention relates to an environmentally durable composition which has superior low temperature dynamic properties. The composition comprises a substantially homogeneous mixture of 100 parts by weight elastomer having a fully saturated backbone, curing agent for the elastomer in amounts sufficie

This invention relates to an environmentally durable composition which has superior low temperature dynamic properties. The composition comprises a substantially homogeneous mixture of 100 parts by weight elastomer having a fully saturated backbone, curing agent for the elastomer in amounts sufficient to crosslink the elastomer, reinforcing particulate filler, at least 20 parts by weight of particularly defined polyalphaolefin oil and, preferably, particularly defined paraffinic oil and/or naphthenic oil. Inclusion of the polyalphaolefin oil in the composition improves the low temperature dynamic properties and processability of the elastomer, which are further improved by inclusion of naphthenic oil and/or paraffinic oil therein. Particulate graphite may be incorporated into the composition to lower its friction.

대표청구항 ▼

An elastomer composition comprising a substantially homogeneous mixture of: (a) 100 parts by weight of elastomer having a fully saturated backbone; (b) curing agent for said elastomer in amount sufficient to crosslink said elastomer; (c) reinforcing particulate filler; and (d) at least 20 parts by w

An elastomer composition comprising a substantially homogeneous mixture of: (a) 100 parts by weight of elastomer having a fully saturated backbone; (b) curing agent for said elastomer in amount sufficient to crosslink said elastomer; (c) reinforcing particulate filler; and (d) at least 20 parts by weight polyalphaolefin oil having a kinematic viscosity of between about 2 and about 200 centistokes wherein at least 85% by weight of said polyalphaolefin oil boils above about 180°C.