Water-dispersable air-drying coatings
First Claim
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1. An air-drying, water-reducible, acid-functional polyurethane which comprises the reaction product obtained by reacting:
- (i) a fatty amide diol obtained by the reaction of a fatty acid or fatty acid derivative and an N,N-dialkanol amine; and
(ii) a diisocyanate; and
(iii) an acid-functional compound which also has two active hydrogen groups, other than acid groups, which are reactive with the diisocyanate.
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Abstract
Air-drying, water-reducible, acid-functional polyurethanes are obtained by reacting:
(i) a fatty amide diol obtained by the reaction of a fatty acid or fatty acid derivative and an N,N-dialkanol amine; and
(ii) a diisocyanate; and
(iii) an acid-functional compound which also has two active hydrogen groups, other than acid groups, which are reactive with the dissocyanate.
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Citations
20 Claims
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1. An air-drying, water-reducible, acid-functional polyurethane which comprises the reaction product obtained by reacting:
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(i) a fatty amide diol obtained by the reaction of a fatty acid or fatty acid derivative and an N,N-dialkanol amine; and (ii) a diisocyanate; and (iii) an acid-functional compound which also has two active hydrogen groups, other than acid groups, which are reactive with the diisocyanate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An air-drying, water-reducible, acid-functional polyurethane which comprises the reaction product obtained by reacting a mixture of reactants which comprises in percent by weight:
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(i) 10 to 50% of a fatty amide diol obtained by the reaction of a fatty acid or fatty acid derivative and an N,N-dialkanol amine; and (ii) 30-70% of a diisocyanate; and (iii) 5-40% of an acid-functional compound which also has two active hydrogen groups, other than acid groups, which are reactive with the diisocyanate; and (iv) 0-30% of a diol or diamine chain extender; and (v) 0-5% of a polyfunctional material having more than two active hydrogens or more than two isocyanate groups per molecule.
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19. An aqueous coating composition which comprises an aqueous dispersion of a base-neutralized acid-functional air-drying polyurethane wherein the acid-functional air-drying polyurethane comprises the reaction product obtained by reacting:
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(i) a fatty amide diol obtained by the reaction of a fatty acid or fatty acid derivative and an N,N-dialkanol amine; and (ii) a diisocyanate; and (iii) an acid-functional compound which also has two active hydrogen groups, other than acid groups, which are reactive with the diisocyanate. - View Dependent Claims (20)
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Specification