Polypropylene resin composition comprising talc having specified average diameter and particle size
US4604421A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1985 |
| Grant date | Aug 5, 1986 |
| Priority date | — |
| Expiry date | Mar 26, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L23/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A resin composition is provided which comprises a crystalline propylene-ethylene copolymer resin mixed with mica having a specified average particle diameter and particle size distribution or a rubber-like material so that it shows an excellent balance between rigidity and impact strength and an excellent thermal resistance and provides an excellent appearance when formed in products. In a preferred embodiment, the polypropylene resin composition comprises 50 to 97% by weight of a crystalline propylene-ethylene copolymer resin, 0 to 20% by weight of a rubber-like material, and 3 to 50% by weight of mica having an average particle diameter determined by photo extinction sedimentation method of 0.5 to 4.5.mu. and a particle size distribution of 95% or more by weight for 10.mu. or less, 60% or more by weight for 5.mu. or less, and 10 to 80% by weight for 1.mu. or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.