High inorganic filler content composition
US4153587A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 1977 |
| Grant date | May 8, 1979 |
| Priority date | — |
| Expiry date | May 6, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L23/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A modified propylene polymer containing mixed polymer composition characterized by high tensile strength, high elongation and good bending stiffness which consists essentially of: PA1 A. a crystalline polypropylene PA1 B. a block copolymer wherein a propylene-ethylene random copolymer is chain-terminated onto said crystalline polypropylene PA1 C. a crystalline ethylene-propylene random copolymer having an ethylene content of more than about 90% by weight, The improvement which comprises admixing with said modified propylene polymer at least 30% by weight of an inorganic filler having an average particle size of less than 20.mu. in diameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.