Crosslinked hydrogel coatings

Details Crosslinked hydrogel coatings Crosslinked hydrogel coatings

1996-11-18

1998-07-07

Lusignan, Michael

Stock material or miscellaneous articles

Composite

Of polyamidoester

427 23, 4273882, 427435, 4284258, 528 45, 528 52, 528 59, 528 66, 528 75, 604264, 604265, B32B 2700, B32B 2740

Patent

active

057766118

ABSTRACT:
A hydrophilic, lubricious, durable, flexible, coating comprising a crosslinked polyurea matrix complexed with a hydrophilic polymer selected from the group consisting of poly (ethylene oxide) and polyvinylpyrrolidone, said crosslinked polymer formed from the reaction of an isocyanate and a compound having at least two active hydrogens per molecule selected from the group consisting of polyamines, polymercaptans, and polycarboxylates or compounds with NH, NH.sub.2, SH or COOH groups on same molecule in the presence of said hydrophilic polymer, with the total sum of the average isocyanate functionality plus the average active hydrogen functionality exceeding 4 and the molar ratio of total NCO groups to total active hydrogens being at least 0.8.

REFERENCES:
patent: 4938901 (1990-07-01), Groitzsch et al.
patent: 5104930 (1992-04-01), Rinde et al.
patent: 5160790 (1992-11-01), Elton
patent: 5169720 (1992-12-01), Braatz et al.
patent: 5175229 (1992-12-01), Braatz et al.
patent: 5179174 (1993-01-01), Elton
patent: 5290585 (1994-03-01), Elton

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