Disclosed are random copolymers derived from ethylene and at least two
different alkyl acrylate comonomers, with or without an acid cure
site-containing comonomer. In particular, disclosed are copolymers
derived from copolymerization of (a) from 10 to 50 weight % of ethylene;
(b) from 5 to 55 weight % of a first alkyl acrylate; (b) from 15 to 80
weight % of a second alkyl acrylate; and (d) from 0 to 7 weight % of a
monoalkyl ester of 1,4-butene-dioic acid. Such copolymers exhibit lower
glass transition temperatures (Tg) relative to previous ethylene
copolymers comprising a single alkyl acrylate comonomer and maintain the
good heat and fluid resistance when employed to produce cured elastomeric
compositions as well as the improved low temperature properties. This
invention also provides compounded compositions comprising these
copolymers, and cured compositions (i.e., vulcanizates) as well as rubber
articles formed from these compounded compositions, such as hoses,
dampers, seals, gaskets, constant velocity joint (CVJ) boots and shaft
boots.