Plasto-elastic polypropylene compositions
US5302454A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1992 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | Aug 17, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polypropylene compositions having valued plasto-elastic properties, in the form of spheroidal flowable particles with an average diameter included between 500 and 7000 um having the following composition: PA0 A) 10-60 parts by weight of homopolymer polypropylene with isotactic index greater than 90, or of crystalline propylene copolymer with ethylene and/or an alpha olefin such as butene-1, pentene-1 or 4-methyl-1-pentene, containing over 85% by weight of propylene and having an isotactic index greater than 85; PA0 B) 10-40 parts by weight of a polymer fraction containing ethylene, insoluble in xylene at room temperature; PA0 C) 30-60 parts by weight of an amorphous copolymer ethylene-propylene fraction optionally containing small proportions of a diene, soluble in xylene at room temperature and containing 40-70% by weight of ethylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.