Propylene polymer ethylene/olefin rubber and polyethylene block copolymer
US5708083A · kind A · utility
Inventors
Key dates
| Filing date | Feb 13, 1997 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Feb 13, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/035
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyolefin resin composition is disclosed which comprises PA1 (a) a crystalline propylene polymer in an amount of 40% or more to less than 95% by weight, PA1 (b) an ethylene/.alpha.-olefin rubber in an amount of from 5 to 40% by weight, and PA1 (c) a linear or branched specified block copolymer in an amount of from 0.1 to 20% by weight containing a polyethylene block segment A having a melting temperature as measured with a differential scanning calorimeter of from 80.degree. to 120.degree. C. and an ethylene/.alpha.-olefin copolymer block segment B, the total content of components (a), (b), and (c) being 100% by weight, which composition has excellent dispersibility of the rubber used, so that moldings having an excellent balance between rigidity and impact resistance are obtained therefrom, and is hence suitable for use in the field of moldings required to have rigidity and impact resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.