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
1993-08-03
1994-10-11
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...
528 61, C08L 7504
Patent
active
053548078
ABSTRACT:
Improved anionic water dispersible polyurethanes are disclosed. Polyurethane-urea polymers in aqueous dispersion are obtained by chain extending an NCO-containing prepolymer in aqueous medium. The NCO-containing prepolymer is prepared by reacting a polyisocyanate with an active hydrogen-containing compound such as a polyol and dimethylolpropionic acid (DMPA) to form a pre-prepolymer and to this is added a diamine monomer containing a pendant aliphatic, to form the prepolymer which is then dispersed in water and chain extended. The improved anionic water dispersible polyurethane polymers of the invention form excellent coatings and adhesives.
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Aqueous Polyurethane Dispersions From TMXDI.RTM. (META) Aliphatic Isocyanate Dated Feb. 1989.
NIAX.RTM. Performance Polyether Polyol PWB-1200 (From Union Carbide Corporation).
m- and p-TMXDI: Two New Isocyanates For The Polyurethane Industry, Volker D. Arendt, Raymond E. Logan and Robert Saxon, Journal of Cellular Plastics, Nov./Dec. 1982.
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Appendix A-"How emulsion polymer/isocyanate adhesives solve bonding problems," RPN Technical Notebook, Mar. 11, 1985.
H. B. Fuller Licensing & Financing Inc.
Welsh Maurice J.
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