IP Library › Patent Application 19041330
Patent Application
App. No. 19/041,330

POLYURETHANE COATING COMPOSITION

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Quick Facts
Patent No.
US None
App. No.
19/041,330
Abstract

Methods of making a two-component composition that can be applied to a substrate and cured to provide a coating that demonstrates minimal solvent pop at the dry film thickness limit of the coating are provided. A cured coating made from the two-component composition demonstrates minimal solvent pop, minimal air entrapment, and optimal dry spray and overspray acceptance. Coated articles made using the methods described herein are also provided

Claims (18)

1 . A method, comprising:

providing a first component of a coating composition;

providing a reaction mixture including

a first solvent and a second solvent, wherein the first solvent is ethyl acetoacetate present in an amount of about 1 to 5 wt %, based on the total weight of the composition, and the second solvent is acetone, and wherein the first and second solvents are present in a ratio of 80/20; and

a catalyst;

combining the first component with the reaction mixture, wherein the reaction mixture is 60 to 75% water, based on the total weight of the reaction mixture;

obtaining a two-component composition by mixing the combination of the first component and the reaction mixture with a second component; and

applying the composition to a substrate at a dry film thickness of 4 to 6 mil and drying at temperatures of 25° C. up to about 160° C. to form a cured coating that demonstrates minimal solvent pop.

2 . The method of claim 1 , wherein the first component includes at least one polyol.

3 . The method of claim 1 , wherein the second component includes at least one polyisocyanate.

4 . The method of claim 1 , wherein the catalyst is selected from metal, metal alkoxide, metal salts of aliphatic carboxylic acids, metal salts of alicyclic carboxylic acids, and combinations thereof.

5 . The method of claim 1 , wherein the catalyst is selected from tin salts, zinc salts, lithium salts, and combinations thereof.

6 . The method of claim 1 , wherein the catalyst is a tin compound.

7 . The method of claim 1 , wherein the catalyst is a zinc compound.

8 . A coated article, comprising:

a substrate; and

a cured coating applied thereon, wherein the coating is obtained by the method of claim 1 .

9 . The article of claim 8 , wherein the substrate is a metal substrate.