| abstract |
(57) [Summary] [Structure] A method for producing a polyvalent metal salt of a salicylic acid resin, which comprises reacting a salicylic acid derivative and a styrene derivative at −20 to less than 40 ° C. in the presence of sulfuric acid, and then reacting them with a polyvalent metal compound. And an aqueous dispersion in which the polyvalent metal salt of the resin is dispersed, and a color developing sheet using the polyvalent metal salt of the resin. [Effect] It is possible to produce a polyvalent metal salt of salicylic acid resin, which has excellent performance as a developer for pressure-sensitive recording. |