Polymeric membrane compositions
US6953828B2 · kind B2 · utility
12Cited by
4References
55Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2002 |
| Grant date | Oct 11, 2005 |
| Priority date | — |
| Expiry date | Jan 27, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L23/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Blends of very low density polyethylene produced using metallocene catalysts (mVLDPE) and polypropylene are disclosed. The polymer blends include a metallocene-catalyzed VLDPE polymer having a density of less than 0.916 g/cm3, the mVLDPE polymer preferably being linear and without long chain branching, a polypropylene homopolymer, random copolymer, or impact copolymer, and optionally flame retardant additives. The polymer blends are particularly suitable in membrane applications where increased tear resistance and tensile strength are desirable, such as in roof membranes, geomembranes, and pond liners.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.