Polyurea copolymer coating compositions and methods
AssigneeInnovative Surface Technologies, Inc.
InventorsKristin Taton, Daniel Guire, Nathaniel Olson, Eric Guire, Patrick Guire
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Abstract
Durable polyurea copolymer coatings can be applied to surfaces that come in contact with fluids, such as biological fluids, thereby passivating the surface. Polyurea copolymer coating compositions comprise a reaction product of (a) a diamine composition that includes a polyethylene glycol diamine, and optionally, a dipiperidyl alkane; and (b) a diisocyanate. Solutions containing polyurea copolymers, coated surfaces and methods are also described.
Claims16
A method for forming a passivating coating on a surface of a medical device or aquatic article comprising steps of:
- (a) Providing a polyurea copolymer solution comprising a reaction product of (i) a diamine composition comprising a polyethylene glycol diamine compound having a formula (I), (II), or a mixture of (I) and (II):
- wherein y is an integer in the range of 2 to 40, and x+z is an integer in the range of 1 to 8;
- or
- wherein n is an integer in the range of 1 to 500, and (ii) a diisocyanate, wherein the diisocyanate is present in a molar ratio with total diamines in (i) in a range of 2:1 to 1:2;
- (b) Covering the surface of the medical device or aquatic article with the polyurea copolymer solution to provide a passivating coating on the surface;
- and
- (c) Removing the polyurea copolymer solution from the surface.
Dependencies are inferred from the claim text.