Inorganic filler containing propylene polymer compositions
US4504617A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1982 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | Sep 16, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/802
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An inorganic filler containing propylene polymer composition which comprises 25 to 90% by weight of component (A) and 75 to 10% by weight of component (B): PA0 (A) at least one member selected from the group consisting of PA1 (a) a crystalline propylene copolymer composed of propylene and one or more other .alpha.-olefins; PA1 (b) a composition prepared by blending the copolymer (a) with a synthetic rubber and/or crystalline polypropylene; and PA1 (c) a composition prepared by blending a crystalline polypropylene with a synthetic rubber, wherein PA2 (1) the amount of xylene extractable soluble component at 23.degree. C. is 10 to 50% by weight, and PA2 (2) the propylene content in the extractable soluble component is 30% by weight or more, PA0 (b) an inorganic filler having an average particle size of 200.mu. or less, measured by light transmission in a liquid-phase sedimentation system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.