Flexible foamed polyethylene
US6653360B2 · kind B2 · utility
Inventor
Key dates
| Filing date | May 22, 2002 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | May 22, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2453/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flexible thermoplastic article is formed from a blend comprising from about 2 to about 15 weight percent of a styrene-elastomer block copolymer; from about 60 to about 90 weight percent polyolefin; from about 4 to about 15 weight percent plasticizer oil, and optionally from about 0 to about 3 weight percent of at least one additive. The additives are typically present in a concentration of from 0.05 to about 3 weigh percent and can include those additives conventionally used in polyolefin foam compositions, including antioxidants and stabilizers, processing aids, etc. The styrene-elastomer block copolymer is preferably a tri-block copolymer structure which includes styrene end-blocks and a mid-block of a saturated olefin elastomer. A particularly suitable styrene elastomer block copolymer is a styrene-ethylene/butylene-styrene (SEBS) block copolymer. In one embodiment of the present invention, the styrene-ethylene/butylene-styrene block copolymer has a styrene/rubber ratio of from 30 to 70 with an Average Molecular Weight (Mn) in the range of 50,000 to 300,000. The polyolefin is preferably predominately a polyethylene and desirably comprises from 85 to 100 weight percent polyethy…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.