Aqueous dispersions of polyurethanes from oligo urethanes having

Details Aqueous dispersions of polyurethanes from oligo urethanes having Aqueous dispersions of polyurethanes from oligo urethanes having

1983-06-30

1985-02-05

Schofer, Joseph L.

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, C08L 7504

Patent

active

044979320

ABSTRACT:
A process for producing stable aqueous dispersions of polyurethanes, which comprises reacting a mixture of a diol containing an ionizable group and a polyol-polyester or polyol-polyether, with an aromatic, or cycloaliphatic or aliphatic isocyanate, to form a prepolymer having terminal isocyanic groups, then reacting this last with a hydroxy-alkyl-(meth)acrylate to obtain an oligourethane having unsaturated terminal groups, and finally dispersing said oligourethane in water and polymerizing it in the presence of radicalic catalysts.

REFERENCES:
patent: 3472807 (1969-10-01), Isaacs
patent: 3948837 (1976-04-01), Schmitt et al.
patent: 4331717 (1982-05-01), Wenzel et al.

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