Process of forming a coating on a substrate
AssigneeAxalta Coating Systems IP Co., LLC
InventorsAyumu Yokoyama, Eric C. Houze
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Abstract
The present disclosure relates to a process for forming a layer of a coating composition on a substrate wherein the coating composition comprises a waterborne film forming polymer, an isocyanate and a melamine. The process involves forming a mixture of the waterborne film forming polymer and the isocyanate and allowing the mixture to mature before adding the melamine component. The result is a layer of the coating composition with a high degree of gloss and gassing resistance.
Claims20
A process for forming a layer of a coating composition on a substrate comprising the steps of:
- forming a first coating mixture, said first coating mixture comprising:
- a film forming polymer having at least two different functional groups, a hydroxyl group and an amine neutralized carboxylic acid group, and
- a polyisocyanate,
- allowing said first coating mixture to mature for about 0.5 to about 60 minutes,
- forming a second coating mixture, said second coating mixture comprising:
- an alkylated melamine that is essentially unreactive to isocyanates;
- and
- an acid catalyst,
- forming the coating composition by mixing together the matured first coating mixture and the second coating mixture,
- applying a layer of the coating composition onto the substrate;
- and
- curing the applied layer of coating composition.
A process for producing a coating composition, the process comprising the steps of:
- forming a first coating mixture, the first coating mixture comprising:
- a film-forming polymer having at least two different functional groups, a hydroxyl group and an amine neutralized carboxylic acid group, and
- a polyisocyanate;
- allowing the first coating mixture to mature for about 0.5 to about 60 minutes,
- forming a second coating mixture, the second coating mixture comprising:
- an alkylated melamine that is essentially unreactive to isocyanates;
- and
- an acid catalyst, and
- forming the coating composition by mixing together the matured first coating mixture and the second coating mixture.
Dependencies are inferred from the claim text.