| 摘要 |
PURPOSE:To obtain a phenolic compound capable of simultaneously satisfying coloring concentration, coloring sensitivity, unprinted part storing properties, printed part storing properties (weather resistance, chemical resistance, etc.), etc., as an electron accepting compound for pressure sensitive recording material and heat sensitive recording material. CONSTITUTION:A 3,3'-diphenyl-4-hydroxy-4'-substituted hydroxydiphenyl sulfone compound of formula I [R is an alkyl which may have a substituent group (alkoxy, aryl or aryloxy)], e.g. a compound of formula II. The compound is obtained by reacting bis(3-phenyl-4-hydroxyphenyl) sulfone with a halide, a paratoluene-sulfonic acid ester, a sulfuric acid ester, etc., of the corresponding alkyl group, aralkyl group or aryloxyalkyl group in the presence of a binding agent or reacting the corresponding alkyl, aralkyl or aryloxyalkyl ether of 4-hydroxy-3-phenylbenzenesulfonyl chloride with orthophenyl-phenol in the presence of a binding agent. |
