Modified styrenic block copolymer compounds having improved elastic performance
US6630532B1 · kind B1 · utility
3Cited by
12References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 7, 2000 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | Sep 7, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/01
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is an improved block copolymer composition for extruding films having excellent stress relaxation and increased retained tension or load at elevated temperatures. The compound is comprised of:(a) from 52 to 60 percent by weight of a block copolymer having at least two polystyrene endblocks and a midblock of hydrogentated polymerized butadiene which has a vinyl content of 45 percent by weight or less(b) from 13 to 22 percent by weight of polystyrene, and(c) from 19 to 28 percent by weight of oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.