Polyurethanes, dispersions thereof, their preparation and use
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United States of America Patent
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Jun 16, 2020
Grant Date -
Sep 3, 2015
app pub date -
Nov 12, 2013
filing date -
Nov 16, 2012
priority date (Note) -
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Abstract
The present invention relates to polyurethanes (A) being obtainable by reaction of (a) 15% to 70% by weight of di- or polyisocyanate comprising on average from 1 to 10 allophanate groups and on average from 1 to 10 C—C double bonds per molecule, and optionally (b) 0% to 60% by weight of further di- or polyisocyanate, with (c) 5% to 50% by weight of compounds having at least two isocyanate-reactive groups, comprising at least one polycarbonate diol with a molecular weight from 500 to 3000 g/mol weight % ages being based on total polyurethane (A), with the proviso that the total is 100%.
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