AQUEOUS POLYURETHANE-POLYUREA DISPERSION AND AQUEOUS BASE PAINT CONTAINING SAID DISPERSION
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United States of America Patent
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Issued Date -
Jan 4, 2018
app pub date -
Nov 18, 2015
filing date -
Dec 9, 2014
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Abstract
The present invention relates to an aqueous polyurethane-polyurea dispersion (PD) having polyurethane-polyurea particles, present in the dispersion, having an average particle size of 40 to 2000 nm, and having a gel fraction of at least 50%, the polyurethane-polyurea particles comprising, in each case in reacted form,
- (Z.1.1) at least one polyurethane prepolymer containing isocyanate groups and comprising anionic groups and/or groups which can be converted into anionic groups, and(Z.1.2) at least one polyamine comprising two primary amino groups and one or two secondary amino groups, and the dispersion (PD) consisting to an extent of at least 90 wt % of the polyurethane-polyurea particles and water.
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