US 7,550,538 B2
	Chlorosulfonated propylene/olefin elastomers
Avinash C. Gadkari, Pearland, Tex. (US)
Assigned to DuPont Performance Elastomers LLC, Wilmington, Del. (US)
Filed on Mar. 12, 2008, as Appl. No. 12/75,525.
Claims priority of provisional application 60/921590, filed on Apr. 03, 2007.
Prior Publication US 2008/0249249 A1, Oct. 09, 2008
Int. Cl. C08C 19/12 (2006.01); C08C 19/20 (2006.01); C08L 23/34 (2006.01); C08F 8/38 (2006.01)

U.S. Cl. 525—333.7  [525/343; 525/344; 525/353; 525/355; 525/356; 525/383]

6 Claims

1. A chlorosulfonated propylene/olefin copolymer composition comprising at least one chlorosulfonated propylene/olefin copolymer having 0.5 to 55 weight percent chlorine and 0.15 to 5 weight percent sulfur, based on total weight of said chlorosulfonated propylene/olefin copolymer, and wherein said chlorosulfonated propylene/olefin copolymer is produced from a propylene/olefin copolymer comprising copolymerized units of 70 to 98 weight percent propylene and 2 to 30 weight percent, based on total weight of said propylene/olefin copolymer, of an olefin selected from the group consisting of i) ethylene and ii) an alpha-olefin having 4 to 20 carbon atoms, said propylene/olefin copolymer having a ratio of Mw/Mn less than 3.5.