Radiation curable coatings containing hydroxy functional polyethers and polyesters of monoethylenic acids or hydroxy esters thereof
AssigneeMobil Oil Corporation
InventorMarvin L. Kaufman
Life of this patent
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Abstract
Relatively water insoluble hydroxy functional monoethylenic polyethers or polyesters of monoethylenic carboxylic acids or hydroxy aklys esters thereof are formed by adducting the monoethylenic acid or its hydroxy ester with an anhydride selected from monoepoxides, lactones, or mixtures thereof in the presence of a Lewis acid catalyst, such as BF.sub.3 etherate, at a temperature below that at which the unsaturation is consumed, typically about 30.degree.-70.degree. C. These adducts are of low volatility and of low toxicity and can be radiation cured in admixture with polyacrylates to form coatings having improved resistance to elevated temperature exposure.
Claims11
A radiation curable coating composition comprising a monoethylenic adduct of a monoethylenic carboxylic acid or hydroxy alkyl ester thereof with an anhydride containing at least 3 carbon atoms and selected from the group consisting of monoepoxides, lactones, and mixtures thereof, said adduct containing an average of at least 1 mole of said anhydride per mole of said hydroxy ester or an average of at least 2 moles of said anhydride per mole of said acid, said monoethylenic adduct being in admixture with a polyacrylate providing a plurality of ethylenically unsaturated acrylic acid ester groups.
An ultraviolet curable coating composition as recited in claim 4 in which said adduct contains an average of from about 3 to about 10 moles of said anhydride per mole of said acid or hydroxy alkyl ester thereof.
An ultraviolet curable coating composition comprising a monoethylenic adduct of acrylic acid or hydroxy alkyl ester thereof with an anhydride containing at least three carbon atoms and selected from the group consisting of monoepoxides and mixtures thereof with lactones, said adduct containing an average of from 3 to about 10 moles of said anhydride per mole of said acid or alkyl ester thereof and said anhydride comprising propylene oxide, said monoethylenic adduct being in admixture with a polyacrylate providing a plurality of ethylenically unsaturated acrylic acid ester groups, said composition further including a photosensitizer rendering the composition sensitive to ultraviolet light.
Dependencies are inferred from the claim text.