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

1973-11-09

1976-11-23

Welsh, M. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

427393, 428423, 260 775AT, 260 775AA, C08J 300

Patent

active

039936147

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.

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Degering, Organic Chemistry, 6th Ed., Barnes & Noble, NY, 1957, pp. 206-207.
Saunders et al., Part I, Interscience, NY, 1962, pp. 94 & 95.

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