Patent ID: 8013072

Claim:
A chlorosulfonated polyolefin composition comprising at least one chlorosulfonated polyolefin having 0.5 to 10 weight percent chlorine, 0.25 to 5 weight percent sulfur, based on total weight of said chlorosulfonated polyolefin, and a plurality of —SO 3 H groups, and wherein said chlorosulfonated polyolefin is produced from a polyolefin base resin selected from the group consisting of i) a low density polyethylene and ii) a linear copolymer comprising copolymerized units of 45 to 80 weight percent ethylene and 55 to 20 weight percent, based on total weight of said linear copolymer, of an alpha-olefin having 3 to 20 carbon atoms, said linear olefin copolymer having a ratio of Mw/Mn less than 3.5.