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US 12,421,348 B2Granted
Coating compositions and methods with polyfunctional carbamate salt
AssigneeSwimc LLC
InventorsNathan McCormick, Jason Lindquist
Life of this patent
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Abstract
A latent base catalyst and compositions and methods involving latent base-catalyzed Michael addition reaction are described herein. The described latent base catalyst is a substituted carbamate salt. The compositions described herein are derived from a Michael addition reaction and provide coatings, including primer coatings and direct-to-metal coatings, which have optimal potlife and cure response, and also demonstrate optimal adhesion, corrosion resistance, and weatherability when applied to a substrate and cured.
Claims5
A method of preparing a latent catalyst, comprising:
- providing a hydroxide-functional component;
- providing a multifunctional isocyanate component wherein the multifunctional isocyanate is hexamethylene diisocyanate trimer, hexamethyelene diisocyanate homopolymer, or combinations thereof:
- reacting the hydroxide-functional component with the multifunctional isocyanate component to produce a latent catalyst having the structure of general formula (I):
- where:
- each X+is independently a non-acidic cation;
- each R1 is independently H, C1 to C10 alkyl, aryl, aralkyl, or C1 to C10 substituted alkyl, aryl, aralkyl, or mixture or combinations thereof;
- each R2 and R3 is each independently C1 to C10 alkyl, aryl, aralkyl, or C1 to C10 substituted alkyl, aryl, aralkyl, or mixture or combinations thereof;
- and
- n is greater than 1.
6 more elements
Dependencies are inferred from the claim text.