Process for the preparation of water-dispersible or water-solubl

Details Process for the preparation of water-dispersible or water-solubl Process for the preparation of water-dispersible or water-solubl

1979-12-10

1981-08-18

Smith, Ronald H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

528 45, C08L 7506

Patent

active

042845440

ABSTRACT:
Blocked polyisocyanates with improved water-dispersible or water-soluble properties are prepared by reacting polyisocyanates, in which 50 to 99.8% of the isocyanate groups are blocked, optionally in a solvent-free environment with an organic polyaminosulphonate or an organic polyaminosulphonic acid in sufficient quantities to provide an end product containing from 0.1 to 10%, by weight, of sulphonate groups (SO.sub.3.sup.-). The blocked polyisocyanates have particular utility when used in combination with hydrophobic polyhydroxyl compounds as binders in aqueous coating compounds.

REFERENCES:
patent: 4028313 (1977-06-01), Muller et al.
patent: 4098933 (1978-07-01), Burkhardt et al.
patent: 4184990 (1980-01-01), Reischl et al.

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