Dual cure coating compositions
First Claim
Patent Images
1. A coating composition comprising:
- a first resin containing plural beta hydroxyl alkyl acrylate groups;
a second resin consisting of an aminoplast resin;
a photopolymerization initiator for said first resin, said initiator being selected from those initiators which decompose upon exposure to UV radiation to generate an acid catalyst for the cross-linking reaction of said aminoplast resin and the hydroxy groups of said first resin.
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Abstract
Dual cure coating compositions are prepared by one of the following techniques: aminoplast crosslinking with residual hydroxy present on extended acrylated or UV cure polymers; oxidative crosslinking of backbone drying oil unsaturation following UV cure; or by employing UV chain extension via reaction of pendent allylic group with polymercaptans followed by a melamine heat cure. The coatings are cured by UV exposure followed by heating or air drying.
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Citations
5 Claims
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1. A coating composition comprising:
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a first resin containing plural beta hydroxyl alkyl acrylate groups; a second resin consisting of an aminoplast resin; a photopolymerization initiator for said first resin, said initiator being selected from those initiators which decompose upon exposure to UV radiation to generate an acid catalyst for the cross-linking reaction of said aminoplast resin and the hydroxy groups of said first resin. - View Dependent Claims (2, 3, 4, 5)
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Specification