Process for preparing modified copolymers

Details Process for preparing modified copolymers Process for preparing modified copolymers

1973-03-26

1976-03-09

Schofer, Joseph L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

106 30, 106 32, 260 336UA, 260 785T, 260875, C08f 2704

Patent

active

039431118

ABSTRACT:
A process for preparing modified copolymers while substantially reducing disintegration, which copolymers contain carboxylic groups to which cations of polyvalent metals are bound which comprises reacting in a first stage a solution of a copolymer containing anhydride groups of vicinal carboxylic groups or a combination of such anhydride with vicinal carboxylic groups and/or other radicals capable of forming vicinal carboxylic groups with certain alcohols to yield a reaction product in which at least a part of the anhydride groups is converted to semiester groups, and reacting the product thus obtained in the presence of water at a temperature in the range from 50.degree. to 120.degree. C with a salt-forming compound of a polyvalent metal. The invention is also directed to resinous compositions, particularly printing inks, containing such products.

REFERENCES:
patent: 3511798 (1970-05-01), Isaacson
patent: 3563937 (1971-02-01), Nickerson
patent: 3580893 (1971-05-01), Heilman
patent: 3775381 (1973-11-01), Hayashi et al.
patent: 3786012 (1974-01-01), Marion et al.
patent: 3789035 (1974-01-01), Iwami et al.

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