Patent ID: 9598604
Date: 2017-03-21
CPC Classifications: C08G,C09D,C14C,Y10T

Claim:
1. A process for preparing aqueous polyurethane-polyurea dispersions comprising a sidechain-bearing polyurethane-polyurea polymer, the process comprising the steps of A) initially B) subsequently producing an NCO-containing polyurethane prepolymer by reacting C) the prepolymer from B) being dispersed in water, D) optionally reacting the still free NCO groups of the prepolymer with isocyanate-reactive monoamines, polyamines, hydrazine, hydrazides or a mixture thereof, wherein the amount of substance thereof is determined such that an arithmetic ratio of isocyanate-reactive NH groups to NCO groups in the range from 0 to 1.2 is obtained, wherein said reaction D) can be effected partly or else wholly before or during the dispersing step C), and wherein the Al) components are monoamines of structural formula (1) wherein