Olefinic block copolymers containing three blocks
US4910262A · kind A · utility
5Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1989 |
| Grant date | Mar 20, 1990 |
| Priority date | — |
| Expiry date | Jan 25, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F297/086
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A novel block copolymer consisting essentially of ethylene and propylene and comprising 1 to 20 parts by weight of block (A) having an ethylene content of 0 to 4% by weight, 5 to 49 parts by weight of block (B) having an ethylene content of more than 4% and less than 25% by weight, and 50 to 94 parts by weight of block (C) having an ethylene content of 25 to 85% by weight. The block copolymer is characterized by less formation of flow marks in molding, and also has excellent tensile characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.