Formation of discrete polyalkylene carbonate particles by solvent/non-solvent precipitation
US5041469A · kind A · utility
6Cited by
9References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 6, 1990 |
| Grant date | Aug 20, 1991 |
| Priority date | — |
| Expiry date | Sep 6, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2369/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Discrete, non-agglomerating particles of polyalkylene carbonate are produced by solvent/non-solvent precipitation using certain solvent/non-solvent systems. The free-flowing particles obtained are from 30 to 3000 microns in diameter and are suitable for use in a variety of applications, particularly the preparation of foamed articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.