Anionic aqueous polyurethane having blocked NCO groups and proce

Details Anionic aqueous polyurethane having blocked NCO groups and proce Anionic aqueous polyurethane having blocked NCO groups and proce

1976-07-14

1977-04-05

Tillman, Murray

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 75NH, 260 775AM, 260 775TB, C08G 1880, C08J 306

Patent

active

040161226

ABSTRACT:
An aqueous anionic polyurethane emulsion is prepared by reacting an isocyanate-terminated urethane prepolymer with an excess of a polyalkylene polyamine thereby to form a polyurethane-urea-polyamine, reacting a portion of the free amino groups of said polyurethane-urea-polyamine with a blocked polyisocyanate having a single free isocyanate group, reacting the resulting product with a cyclic dicarboxylic acid anhydride, and mixing the resulting product with an aqueous solution of a basic substance.

REFERENCES:
patent: 3723372 (1973-03-01), Wakimoto et al.
patent: 3799854 (1974-03-01), Jerabek
patent: 3836493 (1974-09-01), Matsuda et al.
patent: 3897377 (1975-07-01), Broecker et al.
patent: 3903031 (1975-09-01), Matsuda et al.
patent: 3903032 (1975-09-01), Matsuda et al.
patent: 3928271 (1975-12-01), Matsuda et al.
patent: 3932561 (1976-01-01), Zamer
patent: 3947338 (1976-03-01), Jerabek et al.
patent: 3951897 (1976-04-01), Matsuda et al.

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