Aqueous composition and method of preparing nonyellowing coating therefrom
First Claim
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1. An aqueous composition comprising:
- a) polymer having pendant crosslinking groups; and
b) one or more unsaturated fatty acid esters;
wherein said unsaturated fatty acid esters have an average iodine number of at least 50;
wherein said unsaturated fatty acid esters comprise less than 10 weight % triethylenically unsaturated fatty acid ester based on the weight of said unsaturated fatty acid esters; and
wherein said aqueous composition comprises less than 5 weight % volatile organic compounds based on weight of said aqueous composition.
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Abstract
An aqueous composition containing at least one unsaturated fatty acid ester and polymer having pendant crosslinking groups is provided. The aqueous composition contains less than 5 weight % volatile organic compounds, based on the weight of the aqueous composition. A method is provided for preparing a nonyellowing dry crosslinked coating. The aqueous composition is useful for preparing crosslinked coatings, suitable in coating applications such as architectural or maintenance paints.
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Citations
10 Claims
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1. An aqueous composition comprising:
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a) polymer having pendant crosslinking groups; and
b) one or more unsaturated fatty acid esters;
wherein said unsaturated fatty acid esters have an average iodine number of at least 50;
wherein said unsaturated fatty acid esters comprise less than 10 weight % triethylenically unsaturated fatty acid ester based on the weight of said unsaturated fatty acid esters; and
wherein said aqueous composition comprises less than 5 weight % volatile organic compounds based on weight of said aqueous composition. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of preparing a nonyellowing crosslinked coating, comprising the steps of:
a) applying an aqueous composition onto a substrate;
wherein said aqueous composition comprises;
1) polymer having pendant crosslinking groups; and
2) one or more unsaturated fatty acid esters;
wherein said unsaturated fatty acid esters have an average iodine number of at least 50;
wherein said unsaturated fatty acid esters comprise less than 10 weight % triethylenically unsaturated fatty acid ester based on the weight of said unsaturated fatty acid esters; and
wherein said aqueous composition comprises less than 5 weight % volatile organic compounds based on weight of said aqueous composition;
b) drying or allowing to dry said aqueous composition applied to said substrate to prepare a dry coating; and
c) crosslinking or allowing to crosslink said dry coating in the presence of oxygen to provide said nonyellowing crosslinked coating. - View Dependent Claims (8, 9, 10)
Specification