Fluorinating polymer surfaces

Details Fluorinating polymer surfaces Fluorinating polymer surfaces

A - Human Necessities

61

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A61L 33/00 (2006.01) A61F 2/06 (2006.01) A61L 33/06 (2006.01) B05D 7/02 (2006.01) C08J 3/09 (2006.01) C08J 7/04 (2006.01) C08J 7/06 (2006.01) C09D 127/12 (2006.01) D06M 15/256 (2006.01) D06M 23/10 (2006.01)

Patent

CA 2094119

Surfaces of polymers, particularly polyesters, can be fluorinated by deposition of a fluorocarbon from solution. The fluoro-carbon 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 R which is soluble in fluorinated alkanes and other fluorinated liquids such as those sold under the trademark FLUORINERT R. 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.

Des surfaces de polymères, en particulier de polyesters, peuvent être fluorées au moyen du dépôt d'un fluorocarbone sous forme de solution. Le fluorocarbone peut se composer d'un fluoropolymère amorphe, tel que le copolymère de tétrafluoréthylène et de bis-2,2-trifluorométhyle-4,5-difluoro-1,2-dioxyde commercialisé sous la marque déposée TEFLON AF R, soluble dans des alcanes fluorés et d'autres liquides fluorés tels que ceux commercialisés sous la marque déposée FLUORINERT R. Des polyesters à surface fluorées, en particulier sous forme de tissus tricotés, sont utiles comme greffes vasculaires: la surface fluorée réduit les effets thrombogènes et l'activation du système complémentaire. Les inconvénients des procédés de fluoration de surfaces connus, tels que les procédés à plasma froid ou à décharge luminescente, sont ainsi évités.

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