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
1987-12-01
1988-08-16
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...
524839, 524840, 528 71, C08G 1848
Patent
active
047645539
ABSTRACT:
The present invention is directed to water dispersible or soluble polyurethanes containing about 0.5 to 30% by weight, based on the weight of the polyurethanes, of ethylene oxide units present in lateral or terminal polyether chains, characterized in that in addition to these ethylene oxide units the polyurethanes contain, as further hydrophilic centers, about 0.1 to 120 milliequivalents, per 100 g of solids content, of carboxylate groups in the form of built-in structural units corresponding to the general formula ##STR1## wherein R denotes an alkyl group having 1 to 4 carbon atoms and the total quantity of carboxylate groups and ethylene oxide units present in lateral or terminal chains is calculated to ensure the solubility or dispersibility of the polyurethanes in water.
The present invention also relates to a process for the preparation of these polyurethanes and to their use for coating substrates.
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patent: 3905929 (1975-09-01), Noll
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patent: 4092286 (1978-05-01), Noll et al.
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patent: 4408008 (1983-10-01), Markusch
Mosbach Jurgen
Noll Klaus
Pedain Josef
Bayer Aktiengesellschaft
Gil Joseph C.
Harsh Gene
Roy Thomas W.
Welsh Maurice J.
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