Preparation of discrete particles of polyalkylene carbonate
US4853462A · kind A · utility
9Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1988 |
| Grant date | Aug 1, 1989 |
| Priority date | — |
| Expiry date | Mar 21, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2369/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The selection of the proper solvent systems for polyalkylene carbonates which completely dissolve the polymer at high temperatures but are non-solvents at lower temperatures allows one to obtain discrete particles of the polymers suitable for many applications, processing and handling. The particles size can be controlled from about 30 to about 3000 microns in diameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.