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.
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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