Preparation of bisulphite adducts of biruet-polyisocyanates

Details Preparation of bisulphite adducts of biruet-polyisocyanates Preparation of bisulphite adducts of biruet-polyisocyanates

1977-02-07

1979-03-13

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

8128A, 260453AB, 528 46, C07C14302

Patent

active

041442687

ABSTRACT:
Bisulphite adducts of biuret-polyisocyanates are prepared by reacting an aqueous solution containing more than 200 gm/l. of sodium bisulphite with a selected alcohol and a biuret-polyisocyanate having one of the following structures: ##STR1## wherein R in each occurrence is the same or different divalent alkyl, cycloalkyl, aryl or aralkyl radical. A preferred adduct is the adduct of N,N',N"-tris(6-isocyanatohexyl) biuret. The adducts are useful for the treatment of fibrous materials, particularly as shrink-resisting agents, for surface coatings and for forming elastomers.

REFERENCES:
patent: 2710816 (1955-06-01), Evans et al.
patent: 2746988 (1956-05-01), Doser et al.
patent: 3898197 (1975-08-01), Guise et al.
patent: 3984365 (1976-10-01), Lienert et al.

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