Process for producing a cationic polyurethane

Details Process for producing a cationic polyurethane Process for producing a cationic polyurethane

1974-12-26

1976-07-27

Welsh, M. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 775Q, 428425, C08G 1838

Patent

active

039717640

ABSTRACT:
Cationic polyurethanes and a process for their production wherein a polyisocyanate, preferably a diisocyanate such as 2,4- or 2,6-tolylene-diisocyanate is reacted with an aliphatic dihydroxy compound substituted with an aliphatic side-chain of at least 10 carbon atoms to form a preliminary adduct or so-called prepolymer with terminal -- NCO groups. This prepolymer is then reacted for chain-lengthening with an aliphatic monomeric diol (A) containing a tertiary nitrogen atom convertible into an ammonium compound or an aliphatic monomeric diol (B) containing a tertiary nitrogen atom already converted into an ammonium compound. The new cationic polyurethanes are especially useful as sizing agents for the sizing of paper.

REFERENCES:
patent: 3436361 (1969-04-01), Wooster
patent: 3479310 (1969-11-01), Dieterich et al.
patent: 3480592 (1969-11-01), Dieterich et al.
patent: 3491050 (1970-01-01), Keberle et al.
patent: 3499852 (1970-03-01), Schroeder et al.
patent: 3637540 (1972-01-01), Wolff et al.
patent: 3726838 (1973-04-01), Eimen et al.
patent: 3792023 (1974-02-01), Havenith et al.

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