Coated substrate having a low coefficient of friction hydrophili

Details Coated substrate having a low coefficient of friction hydrophili Coated substrate having a low coefficient of friction hydrophili

1977-08-08

1978-07-11

Smith, Ronald H.

Coating processes

Medical or dental purpose product; parts; subcombinations;...

Particulate or unit-dosage-article base

260859R, 428425, 428235, 427407R, 427407C, 427407E, 427400, 427333, A61M 2300

Patent

active

041003098

ABSTRACT:
A substrate is coated with a polyvinylpyrollidone-polyurethane interpolymer. In the method, a polyisocyanate and a polyurethane in a solvent such as methyl ethyl ketone are applied to a substrate and the solvent evaporated. If the substrate is a polyurethane, only the polyisocyanate need be employed. Polyvinylpyrollidone in a solvent is then applied to the treated substrate and the solvent evaporated. The invention is applied, for example, to a tube such as a catheter, a condom and a peristaltic pump tube.

REFERENCES:
patent: 3860672 (1975-01-01), Lagally
patent: 3939049 (1969-02-01), Ratner
Gulf General Atomic Project 6004, pp. 1-30.

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