Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1993-01-14
1994-01-25
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524590, 525457, 525458, 528 49, 528 76, C08L 7504
Patent
active
052816540
ABSTRACT:
This invention is directed to a polyurethane mixture. More particularly, there is provided a mixture polyurethanes comprising a first polyurethane with at least two end groups, where each end group comprises a terminal isocyanate and a polyether; a second polyurethane with at least two end groups, where each end group comprises a terminal isocyanate group and a non-functional group; and a third polyurethane with at least two end groups, where one end group comprises a terminal isocyanate and a polyether and one other end group comprises a terminal isocyanate and a non-functional group. A method for improving the sag resistance of an aqueous composition is also provided. This method permits the formulation of aqueous compositions which resist the tendency to sag. The polyurethane mixture of this invention is useful for thickening aqueous compositions such as paints, coatings, cosmetics, personal care items, hair shampoos and conditioners, cleaners, and the like.
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Aviles Rafael G.
Eisenhart Eric K.
Howard Paul R.
Randow Rodney L.
Rohm and Haas Company
Vouros James G.
Welsh Maurice J.
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