Low density microporous polymers and process
US5840774A · kind A · utility
6Cited by
13References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1991 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | Feb 28, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The disclosed invention is a crystalline microporous polymer and process for preparing a low density microporous polymer comprising, providing a mixture of a polymer and a polymer solvent, the mixture capable of achieving a supercritical condition; applying pressure, at a temperature sufficient for the mixture to attain a super critical condition; cooling the supercritical solution that results and precipitating a microporous crystalline polymer product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.