Radiation curable acrylated polyurethane oligomer compositions
First Claim
1. A radiation curable composition which comprises acrylated polyurethane oligomers which are the reaction product of(a) an organic diisocyanate,(b) a polyether diol, and(c) a hydroxyalkyl acrylate or methacrylate blended with the reaction product of(d) an organic diisocyanate,(e) a polyether triol, and(f) a hydroxyalkyl acrylate or methacrylatewherein the organic diisocyanate, (a) and (d), is an aliphatic or cycloaliphatic diisocyanate;
- wherein the polyether diol, (b), is a dihydroxy terminated polyalkylene oxide which contains 2 to 4 carbon atoms in each alkylene group and which has a molecular weight of about 800 to about 2000;
wherein the polyether triol, (e), is a trihydroxy terminated polyalkylene oxide which contains 2 to 3 carbon atoms in each alkylene group and which has a molecular weight of about 300 to about 750;
wherein the alkyl group of the hydroxyalkyl acrylate or methacrylate contains 2 or 3 carbon atoms;
wherein (b) and (e) are in such molar ratios that the resultant composition has an average acrylate or methacrylate functionality of about 2.4 to about 2.6;
wherein 1 mole of diisocyanate is reacted per hydroxyl group of the polyether diol and triol; and
wherein 1 mole of hydroxyalkyl acrylate or methacrylate is reacted per mole of diisocyanate.
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Accused Products
Abstract
Radiation cured compositions having improved abrasion resistance and cure response are made from blends of the reaction product of a diisocyanate, a hydroxyalkyl acrylate and a polyether diol with the reaction product of a diisocyanate, a hydroxyalkyl acrylate and a polyether triol wherein the average acrylate functionality of the blends is from about 2.4 to about 2.6. Such cured compositions are useful as coatings for various substrates.
46 Citations
22 Claims
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1. A radiation curable composition which comprises acrylated polyurethane oligomers which are the reaction product of
(a) an organic diisocyanate, (b) a polyether diol, and (c) a hydroxyalkyl acrylate or methacrylate blended with the reaction product of (d) an organic diisocyanate, (e) a polyether triol, and (f) a hydroxyalkyl acrylate or methacrylate wherein the organic diisocyanate, (a) and (d), is an aliphatic or cycloaliphatic diisocyanate; - wherein the polyether diol, (b), is a dihydroxy terminated polyalkylene oxide which contains 2 to 4 carbon atoms in each alkylene group and which has a molecular weight of about 800 to about 2000;
wherein the polyether triol, (e), is a trihydroxy terminated polyalkylene oxide which contains 2 to 3 carbon atoms in each alkylene group and which has a molecular weight of about 300 to about 750;
wherein the alkyl group of the hydroxyalkyl acrylate or methacrylate contains 2 or 3 carbon atoms;
wherein (b) and (e) are in such molar ratios that the resultant composition has an average acrylate or methacrylate functionality of about 2.4 to about 2.6;
wherein 1 mole of diisocyanate is reacted per hydroxyl group of the polyether diol and triol; and
wherein 1 mole of hydroxyalkyl acrylate or methacrylate is reacted per mole of diisocyanate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- wherein the polyether diol, (b), is a dihydroxy terminated polyalkylene oxide which contains 2 to 4 carbon atoms in each alkylene group and which has a molecular weight of about 800 to about 2000;
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12. A method for providing improved abrasion resistance and cure response to radiation cured compositions which comprises using as the radiation curable composition the reaction product of
(a) an organic diisocyanate, (b) a polyether diol, and (c) a hydroxyalkyl acrylate or methacrylate blended with the reaction product of (d) an organic diisocyanate, (e) a polyether triol, and (f) a hydroxyalkyl acrylate or methacrylate wherein the organic diisocyanate, (a) and (d), is an aliphatic or cycloaliphatic diisocyanate; - wherein the polyether diol, (b), is a dihydroxy terminated polyalkylene oxide which contains 2 to 4 carbon atoms in each alkylene group and which has a molecular weight of about 800 to about 2000;
wherein the polyether triol, (e), is a trihydroxy terminated polyalkylene oxide which contains 2 to 3 carbon atoms in each alkylene group and which has a molecular weight of about 300 to about 750;
wherein the alkyl group of the hydroxyalkyl acrylate or methacrylate contains 2 or 3 carbon atoms;
wherein (b) and (e) are in such molar ratios that the resultant composition has an average acrylate or methacrylate functionality of about 2.4 to about 2.6;
wherein 1 mole of diisocyanate is reacted per hydroxyl group of the polyether diol and triol; and
wherein 1 mole of hydroxyalkyl acrylate or methacrylate is reacted per mole of diisocyanate. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- wherein the polyether diol, (b), is a dihydroxy terminated polyalkylene oxide which contains 2 to 4 carbon atoms in each alkylene group and which has a molecular weight of about 800 to about 2000;
Specification