C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
42/16, 402/314,
C07C 65/105 (2006.01) B41M 5/155 (2006.01) C08F 220/04 (2006.01) C08G 61/02 (2006.01)
Patent
CA 1339560
Disclosed herein are salicylic acid copolymers having a weight average molecular weight of 500 - 10,000 and obtained (a) by condensing salicylic acid (i) with a benzyl alcohol (ii) and/or benzyl ether (iii) or a benzyl halide (iv) in the presence of an acid catalyst or (b) by reacting a co-condensation resin of (i) and (ii) and/or (iii) with (iv) or (c) by reacting a co-condensation resin of (i) and (ii) and/or (iii) or (iv) with a styrene derivative in the presence of an acid catalyst; multivalent metal salts of the salicylic acid copolymers; color-developing agents comprising the multivalent metal salts; and color-developing sheets suited for pressure-sensitive copying paper and comprising the color-developing agents. Their production processes are also disclosed.
550487
Asano Makoto
Tanabe Yoshimitsu
Yamaguchi Akihiro
Yamaguchi Keizaburo
Mitsui Chemicals Incorporated
Mitsui Toatsu Chemicals Incorporated
Sim & Mcburney
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