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US 5,705,556 AGranted
Modified styrenic block copolymer compounds having improved elastic performance
AssigneeShell Oil Company
InventorsLie Khong Djiauw, Rodney Ray Pease
Life of this patent
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Abstract
An extrudable elastomeric composition for making elastic fibers or films, the composition including an elastomeric block copolymer, a polyphenylene ether, a polyolefin, and a tackifying resin. The composition has excellent stress relaxation at temperatures above 30.degree. C.
Claims10
An elastomeric composition, comprising:
- from 25% to 75% by weight of a block copolymer having at least two monoalkenyl arene blocks separated by a hydrogenated conjugated diene block;
- from 5% to 35% by weight of a polyphenylene ether having an intrinsic viscosity from 0.09 to 0.35 deciliters per gram as determined in chloroform at 25.degree. C.;
- from 15% to 55% by weight of a polyolefin;
- from 15% to 30% by weight of a tackifying resin;
- and
- from 0% to 15% by weight of an extending oil.
3 more elements
An elastomeric composition, comprising:
- from 25% to 75% by weight of a block copolymer having at least two polystyrene blocks separated by a hydrogenated conjugated diene block, wherein the block copolymer has a number average molecular weight from 62,000 to 85,000, each polystyrene block has a number average molecular weight from 5,200 to 8,000;
- from 5% to 35% by weight of a polyphenylene ether having an intrinsic viscosity from 0.09 to 0.35 deciliters per gram as measured in chloroform at 25.degree. C.;
- from 15% to 55% by weight of a polyolefin;
- from 15% to 30% by weight of a tackifying resin;
- and
- from 0% to 15% by weight of an extending oil.
3 more elements
Dependencies are inferred from the claim text.