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US 4,727,114 AGranted
Chlorosulfonated polyethylene blends
AssigneeE. I. DuPont de Nemours and Company
InventorJohn C. Chen
Life of this patent
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Abstract
It has been found that if two different chlorosulfonated polyethylenes, each with its own specific selected chlorine and sulfur content range, are blended with polyvinyl chloride, the resulting three-phase blend has good oil resistance and low temperature toughness.
Claims3
A blend comprising a mixture of
- (a) 30-70 weight percent of (a), (b) and (c) of polyvinyl chloride,
- (b) 7.5-55 weight percent of (a), (b) and (c) of a chlorosulfonated polyethylene having a chlorine content of 40-52 weight percent and a sulfur content of 0.2-5 weight percent in the polymer, and
- (c) 7.5-55 weight percent of (a), (b) and (c) of a chlorosulfonated polyethylene having a chlorine content of 24-40 weight percent and a sulfur content of 0.2-5 weight percent in the polymer;
- with the proviso that the chlorine content of the chlorosulfonated polyethylene of components (b) and (c) differs by at least 5 weight percent.
1 more element
Dependencies are inferred from the claim text.