Elastomeric blends
AssigneePolysar Limited
InventorDouglas Coulthard
Life of this patent
Estimating the term…
Abstract
In the blending of a polymer of chloroprene with a lesser proportion of a diene/nitrile rubbery copolymer, a composition of much improved processing, as for example ease of handling on a mill and uniformity of mixing, is obtained when the nitrile copolymer is selected as a copolymer of about 55-80 mole % of a 2-alkyl butadiene-1,3 and about 20-45 mole % of an acrylic nitrile.
Claims4
A chloroprene polymer composition of improved processabiity comprising a blend of (A) about 90-65 parts by weight of a rubbery chloroprene polymer and (B) about 10-35 parts by weight of rubbery copolymer of 55-80 parts by weight of a 2-alkyl butadiene-1,3 where the alkyl group contains 1-5 carbon atoms with 45-20 parts by weight of an acrylic nitrile of the general formula CH.sub.2 = C(R) - CN where R is selected from hydrogen, C.sub.1 -C.sub.3 alkyl, halogen and cyano radicals.
Dependencies are inferred from the claim text.