Sulfonated aromatic polyisocyanates and preparation of stable an

Details Sulfonated aromatic polyisocyanates and preparation of stable an Sulfonated aromatic polyisocyanates and preparation of stable an

1975-04-14

1976-12-21

Mars, Howard T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

427337, 428224, 428288, 428310, 428423, 260 775NC, 156 628, 156 77, 162123, 2521883R, 260 9, 260 37N, 260 49, 260 75TN, 260858, 260859R, 260 2927N, 260453AR, 260455A, 260 47CB, C07C14940

Patent

active

039988708

ABSTRACT:
Self-emulsified polyurethane or polyurethane-polyurea or polyurea latices formed by reacting an aromatic polyisocyanate such as a polyurethane prepolymer with a strong sulfonating agent selected from H.sub.2 SO.sub.4, SO.sub.3, ClSO.sub.3 H, and mixtures thereof, converting the sulfonated polyisocyanate to a sulfonic acid salt by reaction with a base, and mixing the polyisocyanate in water to obtain chain extension and self-emulsification thereof.

REFERENCES:
patent: 3388087 (1968-06-01), Dieterich et al.
Saunders et al., Polyurethanes, Chemistry and Technology, Part I, Interscience Publishers, New York, N. Y., 1962, pp. 261-346.
Bieber, J. Am. Chem. Soc., 75, pp. 1405-1412, (1953).

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