Polyurethane-polyurea aqueous dispersion, and preparation method therefor and use thereof

Abstract

Provided in the present invention are a polyurethane-polyurea aqueous dispersion, and a preparation method therefor and the use thereof. The polyurethane-polyurea aqueous dispersion comprises a unit derived from a component a, wherein the component a comprises at least one polyhydric alcohol with a functionality of 2 or more, and the component a comprises at least 40 wt % or more of a semi-crystalline polyester polyol obtained by reacting a dihydric alcohol with a component I, the component I comprising an aliphatic dicarboxylic acid and a component II at a molar ratio of (2.1-10):1, and the component II being an aromatic dicarboxylic acid and/or aromatic dicarboxylic acid anhydride. A soft and elastic product prepared on the basis of the polyurethane-polyurea aqueous dispersion provided in the present invention has the comprehensive properties of good elasticity, strength, water resistance, wearability, tactility, etc.

Dependencies are inferred from the claim text.