Purification and adhesion of fluoropolymers
US5237049A · kind A · utility
18Cited by
0References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1992 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Aug 28, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/28
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for purifying fluoropolymers by contacting them at temperatures above 140.degree. C. with a liquid perfluorinated cycloalkane. The resulting polymers are particularly useful where polymers with reduced impurities are desirable, such as in medical devices and in parts for the semiconductor manufacturing industry. The liquid perfluorinated cycloalkanes improve the adhesion of fluoropolymer to themselves and other materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.