Polymer surfaces for blood-contacting surfaces of a...

Details Polymer surfaces for blood-contacting surfaces of a... Polymer surfaces for blood-contacting surfaces of a...

C - Chemistry, Metallurgy

08

L

18/1211, 117/183

C08L 83/10 (2006.01) A61L 27/00 (2006.01) A61L 33/06 (2006.01) C08G 18/10 (2006.01) C08G 18/61 (2006.01) C08G 77/455 (2006.01) C08G 77/458 (2006.01) C08G 77/46 (2006.01) C08L 75/04 (2006.01) C08L 83/12 (2006.01) C08L 101/00 (2006.01)

Patent

CA 1206668

-24- POLYMER SURFACES FOR BLOOD-CONTACTING SURFACES OF A BIOMEDICAL DEVICE, AND METHODS FOR FORMING Abstract of the Invention A polymer admixture is formed from at least 95 volume % of a base polymer and less than 5 volume % of a polymer additive including at least first and second different homopolymer chains in graft or block copolymer form. The first chains are characterized by a low critical surface tension but with a tendency to exudate while the second ones lower this tendency. This polymer mixture is formed into the exposed blood-contacting surface of a biomedical device. A preferred additive is a block copolymer of (a) polydialkyl- siloxanes and (b) a polyurethane.

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