US 11,952,505 B1
One component self-crosslinking coatings
Randolph B. Krafcik, Cleveland, OH (US); Jose C. Aravena, Cleveland, OH (US); James E. Rinz, Cleveland, OH (US); Ruisong Xu, Cleveland, OH (US); and Zhangqing Yu, Warrensville Hts, OH (US)
Assigned to SWIMC LLC, Cleveland, OH (US)
Filed by SWIMC LLC, Cleveland, OH (US)
Filed on Jan. 3, 2023, as Appl. No. 18/149,199.
Application 18/149,199 is a continuation of application No. 16/996,693, filed on Aug. 18, 2020, granted, now 11,572,489.
Claims priority of provisional application 62/892,742, filed on Aug. 28, 2019.
This patent is subject to a terminal disclaimer.
Int. Cl. C09D 175/06 (2006.01); C08F 212/08 (2006.01); C08F 216/36 (2006.01); C08F 218/08 (2006.01); C08F 220/56 (2006.01); C08K 5/00 (2006.01); C08K 5/17 (2006.01); C08K 5/24 (2006.01); C09D 133/08 (2006.01)
CPC C09D 175/06 (2013.01) [C08F 212/08 (2013.01); C08F 216/36 (2013.01); C08F 218/08 (2013.01); C08F 220/56 (2013.01); C08K 5/0025 (2013.01); C08K 5/17 (2013.01); C08K 5/24 (2013.01); C09D 133/08 (2013.01)] 16 Claims
 
1. A waterborne one-component coating composition capable of self-crosslinking and exhibiting a gloss and hardness when cured that is similar to a solventborne two-component composition, the composition comprising:
a first, urethane phase including a polyurethane polymer with at least one of polyester diol monomer units, polycarbonate diol monomer units, and ketone-functionalized diol monomer units;
a second phase including polymer having monomer units selected from one of alkyl (meth)acrylate monomer units, vinyl acetate monomer units, styrene monomer units, ketone-functional vinyl monomer units, or combinations thereof, the second phase having a glass transition temperature of about 0° C. to about 100° C.;
a hydrazine-functionalized crosslinking agent configured to crosslink the ketone-functionalized diol monomer units or the ketone-functionalized diol monomer units and the ketone-functional vinyl monomer units; and
one or more reaction moderators,
wherein the urethane phase comprises about 1 to 10 weight percent of the ketone-functionalized diol monomer units based on the weight of the urethane phase;
wherein the one or more reaction moderators are present in the coating composition at 1 to 4 weight percent based on the combined weight of the first and second phases; and
wherein the one or more reaction moderators are selected from the group consisting of dimethyl amino hydroxyl propane, dimethylamino-2-methyl-1-proponol, N—N-dimethyl-3-methoxypropylamine, dimethylaminoethanol and combinations thereof.