Aqueous polyurethane thickener compositions having improved viscosity and rheological properties
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United States of America Patent
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Jul 18, 2000
Grant Date -
N/A
app pub date -
Oct 20, 1997
filing date -
Oct 29, 1996
priority date (Note) -
Expired
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Abstract
The present invention relates to aqueous thickener compositions for adjusting the rheology of aqueous water-dilutable systems which contain A) a polyurethane thickening agent, B) a nonionic emulsifier, C) a compound corresponding to formula (I) ##STR1## wherein, independently of one another, R.sub.1 represents a C.sub.1 -C.sub.6 alkyl group or a C.sub.4 -C.sub.6 cycloalkyl group, R.sub.2 represents a C.sub.1 -C.sub.6 alkyl group or a C.sub.4 -C.sub.6 cycloalkyl group, and n is an integer from 1 to 6, and D) water and optionally another water-dilutable compound. The present invention also relates to the use of these aqueous thickening compositions for thickening aqueous resin systems.
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