发明名称 |
Salicylic acid copolymers and their metal salts, production process thereof, color-developing agents comprising metal salts of the copolymers, and color-developing sheets employing the agents |
摘要 |
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.
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申请公布号 |
US5023366(A) |
申请公布日期 |
1991.06.11 |
申请号 |
US19870111763 |
申请日期 |
1987.10.23 |
申请人 |
MITSUI TOATSU CHEMICALS, INCORPORATED |
发明人 |
YAMAGUCHI, KEIZABURO;TANABE, YOSHIMITSU;ASANO, MAKOTO;YAMAGUCHI, AKIHIRO |
分类号 |
B41M5/155;C08G61/02 |
主分类号 |
B41M5/155 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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