Molded polypropylene-.alpha.-olefin product having low coefficient of linear expansion
US5252659A · kind A · utility
13Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1992 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Aug 21, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2201/016
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A molded product of a polypropylene composition comprising 60 to 85% by weight of a polymer mixture, 2 to 10% by weight of a fibrous filler, and 5 to 38% by weight of an extender. The polymer mixture comprises 30 to 70 parts by weight of polypropylene and 30 to 70 parts by weight of a copolymer of ethylene and an alpha-olefin having a Mooney viscosity [ML.sub.1+4 (100.degree. C.)] which is lower than 70 out of a total of 100 parts of polypropylene and copolymer. The copolymer forms particles dispersed in the product, and the particles have an aspect ratio of at least 5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.