High solid epoxy, melamine and isocyanate compositions
AssigneeE. I. Du Pont de Nemours and Company
InventorsIsao Nagata, Peter William Uhlianuk, Donald A. White
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Abstract
A low VOC clear coat composition which comprises an epoxy compound, a melamine component and an aliphatic polyisocyanate having an average of 2 to 6 isocyanate functionalities, and optionally contains a catalyst (e.g., organotin catalysts, acid catalysts and combinations); a polyhydroxyl functional compound (e.g., polycarbonate polyol); or other additives (e.g., light absorbers and light stabilizers). Also disclosed is an article coated with the clear coat composition, a process of making the composition, and a process of applying the composition to, for example, an automobile body.
Claims42
A low VOC clear coating composition comprising isocyanate, epoxy compound and melamine components wherein said isocyanate component comprises an aliphatic polyisocyanate having an average of 2 to 6 isocyanate functionalities.
A process of making a clear coating composition that upon hardening forms a clear protective coating comprising the steps of:
- combining an aliphatic polyisocyanate having an average of 2 to 6 isocyanate functionalities an epoxy compound, and melamine.
A process of making a clear coating composition that upon hardening forms a protective coating comprising the steps of:
- making a first mixture comprising an epoxy, a melamine;
- making a second mixture comprising an aliphatic polyisocyanate having an average of 2 to 6 isocyanate functionalities;
- and
- combining the first and second mixtures.
A process of making an article comprising the steps of:
- applying a clear coating composition comprising an aliphatic polyisocyanate having an average of 2 to 6 isocyanate functionalities, an epoxy compound, and melamine to a substrate;
- and hardening the composition.
Dependencies are inferred from the claim text.