One-component, ambient curable waterborne coating compositions, related methods and coated substrates
OwnerIrina G. Schwendeman, Venkateshwarlu Kalsani +6inventors
InventorsIrina G. Schwendeman, Venkateshwarlu Kalsani, Ronald R. Ambrose, Mary Ann Fuhry, Shanti Swarup, Anthony M. Chasser, Jonathan T. Martz, Carol L. Boggs
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Abstract
Disclosed are coating compositions that can be one-component, ambient curable, and waterborne. The coating compositions include a polycarbodiimide, a carboxylic acid functional polymer, and a base. The polycarbodiimide is modified for hydrophilicity and is derived from a tetramethylxylylene diisocyanate. The base is present in the composition in an amount sufficient to provide the composition with a pH of at least 9.0.
Claims14
A one component waterborne coating composition comprising:
- (a) a polycarbodiimide that is:
- (i) modified for hydrophilicity;
- and
- (ii) derived from a tetramethylxylylene diisocyanate;
- (b) a carboxylic acid functional polymer;
- and
- (c) a base in an amount greater than the theoretical amount necessary to neutralize 100% of the acid groups of the carboxylic acid functional polymer and sufficient to provide the composition with a pH of at least 9.0.
A method of making a coating composition comprising:
- (a) combining:
- (i) an aqueous dispersion of a polycarbodiimide that is modified for hydrophilicity and derived from a tetramethylxylylene diisocyanate, wherein the aqueous dispersion has a pH of greater than 7.0, with
- (ii) an aqueous dispersion of a base neutralized carboxylic acid functional polymer;
- and
- (b) adding a base to the combination resulting from step (a) in an amount sufficient to provide the combination with a pH of at least 9.0.
Dependencies are inferred from the claim text.