Polyurethane-urea polymers derived from cyclohexane dimethanol
First Claim
1. An aqueous polyurethane dispersion containing from 5 to 70 weight percent polyurethane solids wherein the solids are obtained from at least one isocyanate terminated prepolymer prepared by reacting(a) a polyol or polyol blend having a mean average equivalent weight of 200 to 2,000;
- and(b) at least one polyisocyanate where the prepolymer is dispersed in water;
optionally in the presence of(c) 0.01 to 8 parts by weight of the polyurethane of one or more surfactants; and
(d) one or more amine chain extenders;
wherein the prepolymers have an isocyanate content of from 2 to 40 weight percent and the polyol or polyol blend (a) contains at least 15 weight percent of a polyester based on a C2 to C12 polycarboxylic acid and a glycol component, wherein the glycol component contains isomers of 1,3- and 1,4-cyclohexanedimethanol where the ratio of the 1,3-/1,4-isomers is from 35;
65 to 65;
35.
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Accused Products
Abstract
Aqueous polyurethane dispersion are disclosed where the dispersions contain from 5 to 70 weight percent polyurethane solids wherein the solids are obtained from at least one isocyanate terminated prepolymer prepared by reacting (a) a polyol or polyol blend having a mean average equivalent weight of 200 to 2,000; and (b) at least one polyisocyanate where the prepolymer is dispersed in water; optionally in the presence of (c) one or more stabilizers; or (d) one or more amine chain extenders or both; wherein the prepolymers have an isocyanate (NCO) content of from 2 to 40 weight percent and the polyol or polyol blend (a) contains at least 15 weight percent of a polyester based on a polycarboxylic acid or lactone component and a glycol component, wherein the glycol component contains isomers of 1,3- and 1,4-cyclohexanedimethanol (1,3-/1,4-CHDM) where the ratio of the 1,3-/1,4-isomers is from 35:65 to 65:35.
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Citations
15 Claims
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1. An aqueous polyurethane dispersion containing from 5 to 70 weight percent polyurethane solids wherein the solids are obtained from at least one isocyanate terminated prepolymer prepared by reacting
(a) a polyol or polyol blend having a mean average equivalent weight of 200 to 2,000; - and
(b) at least one polyisocyanate where the prepolymer is dispersed in water;
optionally in the presence of(c) 0.01 to 8 parts by weight of the polyurethane of one or more surfactants; and (d) one or more amine chain extenders; wherein the prepolymers have an isocyanate content of from 2 to 40 weight percent and the polyol or polyol blend (a) contains at least 15 weight percent of a polyester based on a C2 to C12 polycarboxylic acid and a glycol component, wherein the glycol component contains isomers of 1,3- and 1,4-cyclohexanedimethanol where the ratio of the 1,3-/1,4-isomers is from 35;
65 to 65;
35.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification