Aqueous amphoteric polyurethane having blocked NCO groups and pr

Details Aqueous amphoteric polyurethane having blocked NCO groups and pr Aqueous amphoteric polyurethane having blocked NCO groups and pr

1976-07-14

1977-07-19

Tillman, Murray

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

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

Patent

active

040368017

ABSTRACT:
An aqueous amphoteric polyurethane emulsion is prepared by reacting an isocyanate-terminated urethane prepolymer with an excess of a polyalkylene polyamine to form a polyurethane-urea-polyamine; reacting a portion of the free amino groups contained in the resulting product with a blocked polyisocyanate having one free isocyanate group; rendering the remaining amino groups contained in the resulting product amphoteric either (I) by reacting said amino groups with a compound selected from the group consisting of 1,3-propane sultone, 1,4-butane sultone, .beta.-propiolactone, .gamma.-butyrolactone, .epsilon.-caprolactone, .delta.-valerolactone and a monohalogenated sodium carboxylate having the formula

REFERENCES:
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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.
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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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