Water-dilutable polyurethane dispersions
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United States of America Patent
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Mar 18, 2008
Grant Date -
Apr 12, 2007
app pub date -
Jun 21, 2004
filing date -
Jun 27, 2003
priority date (Note) -
Expired
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Abstract
Water-dilutable polyurethane dispersions comprising structural units derived from polyisocyanates A, polyols B having a number-average molar mass M.sub.n of at least 400 g/mol, compounds D that contain at least two groups reactive towards isocyanate groups and at least one group capable of anion formation, low molar mass polyols E that do not carry any further groups reactive towards isocyanate groups, compounds G that are monofunctional towards isocyanates or contain active hydrogen of different reactivity and that are different from the compounds E, characterised in that the polyols B contain a mass fraction of polycarbonate polyols B1 of at least 85%, and the use thereof in coating compositions
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