Process for the preparation of stable aqueous dispersions of oligourethanes or polyurethanes and their use as coating compounds for flexible or rigid substrates
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United States of America Patent
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Dec 22, 1981
Grant Date -
N/A
app pub date -
Jul 8, 1980
filing date -
Jul 26, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process is provided for preparing storage stable, aqueous dispersions of oligourethanes or polyurethanes in admixture with auxiliary agents and additives which are not soluble nor dispersible in water. The oligourethanes or polyurethanes are rendered dispersible in water by incorporating ionic and/or non-ionic hydrophilic groups. In order that the final product remains storage stable, the auxiliary agents or additives are added to the oligourethanes or polyurethanes before they are dispersed in water.
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