Thermoplastic blend of polypropylene, EPM and propylene-ethylene copolymer
US4251646A · kind A · utility
18Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 27, 1979 |
| Grant date | Feb 17, 1981 |
| Priority date | — |
| Expiry date | Jul 27, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermoplastic polymer blends of improved impact strength and knit line toughness consisting essentially of (a) 60-90% by weight polypropylene, (b) 30-35% by weight of thermoplastic crystalline heteroblock propylene-ethylene copolymer and (c) 30-35% by weight of an ethylene-propylene copolymer rubber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.