Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1987-01-16
1988-11-08
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
503216, 525534, 528 86, 528396, 528425, C08G 6306
Patent
active
047835214
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): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 mean individually an alkyl group having 4 or fewer carbon atoms and R.sub.4 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 agents comprising multivalent metal-modified resins of the copolymers; and color-developing sheets obtained by coating the color-developing agents on their surfaces.
REFERENCES:
patent: 2712507 (1955-07-01), Green
patent: 4397897 (1983-04-01), Asano et al.
patent: 4400492 (1983-08-01), Asano et al.
patent: 4704379 (1987-11-01), Shioi et al.
Asano Makoto
Tanabe Yoshimitsu
Wada Masaru
Yamaguchi Akihiro
Yamaguchi Keizaburo
Anderson Harold D.
Mitsui Toatsu Chemicals Incorporated
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