Propylene compositions with improved impact strength
US4774292A · kind A · utility
16Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1987 |
| Grant date | Sep 27, 1988 |
| Priority date | — |
| Expiry date | Dec 16, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L23/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention concerns polypropylene compositions with improved impact strength adapted for conversion to finished articles by extrusion drawing, extrusion blow-molding or thermoforming characterized in that they contain: PA0 (a) 40 to 98% by weight of isotactic polypropylene PA0 (b) 2 to 60% by weight of a copolymer of linear low density polyethylene type with a density of up to 0.935, obtained by copolymerizing a mixture of ethylene and one or more upper alpha-olefins, by a copolymerizing process at a pressure below 4.10.sup.6 Pa, in the absence of any liquid hydrocarbons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.