Polypropylene compositions
US8404324B2 · kind B2 · utility
4Cited by
8References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2010 |
| Grant date | Mar 26, 2013 |
| Priority date | — |
| Expiry date | Jul 15, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/139
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A mineral-filled, polypropylene composition comprises (i) a coupled, impact propylene polymer, and (ii) at least 0.5 weight percent (wt %) based on the weight of the composition of at least one of calcium carbonate and talc. The compositions are useful in the manufacture of three-layer pipe comprising (A) a first or outer non-foam layer; (B) a second or middle foam layer; and (C) a third or inner non-foam layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.