Linear salicylic acid copolymers and their metal salts,...

Details Linear salicylic acid copolymers and their metal salts,... Linear salicylic acid copolymers and their metal salts,...

C - Chemistry, Metallurgy

08

G

42/16, 402/301

C08G 61/00 (2006.01) B41M 5/12 (1985.01)

Patent

CA 1274338

ABSTRACT Disclosed herein are novel linear copolymers having weight average molecular weight of 500 - 30,000 and comprising structural units represented by the following formulae (I), (II), (III) and (IV): Image (I) (II) (III) (IV) wherein R1, R2 and R3 mean individually an alkyl group having 4 or fewer carbon atoms and R4 denotes an alkyl, cycloalkyl, aralkyl or phenyl group, and multivalent metal salts thereof in each of which the multivalent metal forms the multivalent metal salt between carboxyl groups within the same molecule of the copolymer or between different molecules of the copolymer; color-developing agent for use in pressure- sensitive copying paper comprising multivalent metal-modified resins of the copolymers; and color-developing sheets obtained by coating the color-developingagents on their surfaces.

527524

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