Back to results
US H1,808 HGranted
Extrudable styrenic block copolymer compositions containing a metallocene polyolefin
AssigneeShell Oil Company
InventorsLie Khong Djiauw, Rodney Ray Pease
Life of this patent
Estimating the term…
Abstract
An extrudable elastomeric composition for making elastic films having a recoverable energy greater than 60%, the composition includes an elastomeric block copolymer, a metallocene polyolefin, and a tackifying resin. The composition optionally may contain a crystalline polyolefin and an extending oil.
Claims5
An elastic film having recoverable energy greater than 60%, comprising:
- from 25% to 70% by weight of a block copolymer having at least two monoalkenyl arene blocks separated by a hydrogenated conjugated diene block;
- from 15% to 60% by weight of the polymer components of an elastomeric polyolefin having a density from 0.86 to 0.91 and a molecular weight distribution having a polydispersity less than 3, wherein the elastomeric polvolefin is produced by polymerizing ethylene and from 8% to 30% by weight of an .alpha.-olefin comonomer having from 4 to 12 carbon atoms with a metallocene catalyst;
- from 0% to 25% by weight of a crystalline polyolefin;
- and
- a from 15% to 28% by weight of a tackifying resin.
2 more elements
Dependencies are inferred from the claim text.