Chlorinated and chlorosulfonated elastic substantially linear olefin polymers

A blend composition comprising (i) from about 1 to about 100 parts, based on the total weight of (i) and (ii), of a chlorinated polyethylene having a chlorine content of from about 10 to about 48% by weight said chlorinated polyethylene produced by chlorinating a substantially linear olefin polymer characterized as having:

• a) a melt flow ratio, I.sub.10 /I.sub.2 .gtoreq.5.63,
• b) a molecular weight distribution, Mw/Mn, defined by the equation:
• Mw/Mn.ltoreq.(I.sub.10 /I.sub.2)-4.63, and
• c) a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a linear olefin polymer having about the same I.sub.2 and Mw/Mn;
• and
• (ii) from about 100 to about 1 parts, based on the total weight of (i) and (ii), of a polymer selected from the group consisting of linear polyolefins, polyvinyl chlorides, halogenated polyvinylchlorides, polyesters, polyamides, and polycarbonates.