Polypropylene resin composition
US5624991A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1994 |
| Grant date | Apr 29, 1997 |
| Priority date | — |
| Expiry date | Oct 24, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L53/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polypropylene resin composition, which exhibits an excellent coating adherence, high rigidity, high impact strength at low temperatures, prominent heat resistance and excellent appearance of moldings even without effecting a treatment with trichloroethane as a pretreatment step before coating, comprises 30 to 92% by weight crystalline ethylene propylene block copolymer (A), 5 to 30% by weight ethylene-.alpha. olefin copolymer rubber (B), 3 to 20% by weight ethylene-butene-1 copolymer (C) having the following characteristics: PA1 (C1) a density of 0.870 to 0.915 g/cm.sup.3, PA1 (C2) a melt index at 190.degree. C. of 5 to 30 g/10 minutes, and PA1 (C3) a melt peak at 100.degree. C. or higher as determined in the thermogram with increasing temperature by a Differential Scanning Calorimeter (DSC), and 0 to 20% by weight inorganic filler (D).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.