Anionic polyurethanes

Details Anionic polyurethanes Anionic polyurethanes

C - Chemistry, Metallurgy

08

G

402/133, 117/195

C08G 18/34 (2006.01) C08G 18/08 (2006.01) C08G 18/32 (2006.01) C08G 18/36 (2006.01) C08G 18/38 (2006.01)

Patent

CA 1068440

ABSTRACT OF THE DISCLOSURE A process is provided for making an anionic polyurethane wherein a monomeric, aliphatic, dihydroxyl compound having an aliphatic substituent containing at least 10 carbon atoms is reacted with an oragnic polyisocyanate to form an adduct having terminal NCO groups, and the resulting adduct is reacted with an aliphatic monomeric diol chain extender containing an acid group which is capable of salt formation or a salt group. If the chain ox- tender contains an acid group, the chain extended polyurethane is reacted with a basic compound to form a salt alternatively, the preliminary adduct may be reacted with a monomeric, aliphatic, trihydroxyl compound in a molar ratio of about 1:1, the resulting compound being reacted with a cyclic anhydride of n aromatic or aliphatic dicarboxylic acid and then the acid group formed thereby is wholly or partly converted into a salt. The product of the in- vention may be used to size paper.

241173

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