Fluorinating polymer surfaces
US5356668A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1992 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Aug 4, 2012 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M2101/32
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Surfaces of polymers, particularly polyesters, can be fluorinated by deposition of a fluorocarbon from solution. The fluorocarbon may be an amorphous fluoropolymer, such as the copolymer of tetrafluoroethylene and bis-2,2-trifluoromethyl-4,5-difluoro-1,2-dioxole sold under the trademark TEFLON AF.RTM., which is soluble in fluorinated alkanes and other fluorinated liquids such as those sold under the trademark FLUORINERT.RTM.. Surface-fluorinated polyesters, particularly in knitted fabric form, are useful as vascular grafts: the fluorinated surface reduces thrombogenicity and complement activation. The disadvantages of known surface fluorination methods, such as the cold plasma or glow discharge process, are avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.