US 12,698,413 B2 · Aqueous polyurethane-urea dispersion

Abstract

The present invention relates to an aqueous polyurethane-urea dispersion including polyurethane-urea and a preparation method and use thereof, especially in the field of coating compositions, binders or inks, and a product obtained by coating, bonding, sealing or printing with the aqueous polyurethane-urea dispersion. The polyurethane-urea of the aqueous polyurethane-urea dispersion including polyurethane-urea is obtained by the reaction of a system including the following components: a polyisocyanate, a polycarbonate polyol with a hydroxyl functionality of 1.9-2.1, a polyester polyol with a hydroxyl functionality of 1.9-2.1, an amino-containing compound, a hydroxyl-containing carboxylic acid and a neutralizer, where the weight ratio of the polycarbonate polyol to the polyester polyol is 6:1-20:1. The aqueous polyurethane-urea dispersion of the present invention has small particle size, narrow particle size distribution, good color rendering, hydrolysis resistance and color fastness to rubbing, and can be used as a binder for inkjet inks.

Claims15

Dependent claims

An aqueous polyurethane-urea dispersion comprising polyurethane-urea, wherein the polyurethane-urea is obtained by the reaction of a system comprising the following components:

a. at least a polyisocyanate;
b. at least a polycarbonate polyol with a hydroxyl functionality of 1.9-2.1;
c. at least a polyester polyol with a hydroxyl functionality of 1.9-2.1, said polyester polyol being obtained by the reaction of a mixture comprising at least one of aromatic dibasic acids and aromatic acid anhydrides and a dihydric alcohol;
d. at least an amino-containing compound, which is one or more of amino-containing carboxylic acids, amino-containing carboxylate salts, amino-containing sulfonic acids, and amino-containing sulfonate salts;
e. at least a hydroxyl-containing carboxylic acid;
f. at least a neutralizer;
and
g. optionally a compound reactive toward isocyanate groups, which is different from component b)-component e) and has a molecular weight of 32 g/mol-400 g/mol;
and
wherein the weight ratio of the polycarbonate polyol to the polyester polyol is 6:1-20:1.

7 more elements

Dependencies are inferred from the claim text.

Aqueous polyurethane-urea dispersion

Life of this patent

Aqueous polyurethane-urea dispersion

Life of this patent

Abstract

Claims15