US 12,269,963 B2
Polyurea copolymer coating compositions and methods
Kristin Taton, Little Canada, MN (US); Daniel Guire, Hopkins, MN (US); Nathaniel Olson, Minneapolis, MN (US); Eric Guire, St. Paul, MN (US); and Patrick Guire, Hopkins, MN (US)
Assigned to Innovative Surface Technologies, Inc., St. Paul, MN (US)
Filed by Innovative Surface Technologies, Inc., St. Paul, MN (US)
Filed on Aug. 24, 2023, as Appl. No. 18/237,883.
Application 18/237,883 is a continuation of application No. 16/771,285, granted, now 11,781,035, previously published as PCT/US2018/064983, filed on Dec. 11, 2018.
Claims priority of provisional application 62/703,412, filed on Jul. 25, 2018.
Claims priority of provisional application 62/597,148, filed on Dec. 11, 2017.
Prior Publication US 2023/0399538 A1, Dec. 14, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C09D 175/02 (2006.01); A61B 5/00 (2006.01); B05D 1/02 (2006.01); B05D 1/18 (2006.01); C08G 18/32 (2006.01); C08G 18/50 (2006.01); C08G 18/66 (2006.01); C08G 18/73 (2006.01); C08G 18/75 (2006.01); C09D 5/16 (2006.01)
CPC C09D 175/02 (2013.01) [A61B 5/6846 (2013.01); B05D 1/02 (2013.01); B05D 1/18 (2013.01); C08G 18/3228 (2013.01); C08G 18/325 (2013.01); C08G 18/5024 (2013.01); C08G 18/6685 (2013.01); C08G 18/73 (2013.01); C08G 18/755 (2013.01); C09D 5/1662 (2013.01)] 16 Claims
 
1. 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):

OG Complex Work Unit Chemistry
 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

OG Complex Work Unit Chemistry
 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.