Process for the preparation of elastomeric polypropylenes
US5596076A · kind A · utility
1Cited by
5References
6Claims
0Family size
Assignee
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Key dates
| Filing date | May 19, 1994 |
| Grant date | Jan 21, 1997 |
| Priority date | — |
| Expiry date | May 19, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/24
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Process for the preparation of elastomeric, non-agglomerated, powdery/crumbly polypropylene by polymerization of propylene, if appropriate together with other olefins as comonomers, in liquid propylene and subsequent precipitation of the polypropylenes formed with CO.sub.2 or a polar solvent of which the polar term "delta p" of the solubility parameter according to Hansen is greater than 5 and the total solubility parameter "delta" is less than 30.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.