Production process of multivalent metal-modified salicylic...

Details Production process of multivalent metal-modified salicylic... Production process of multivalent metal-modified salicylic...

B - Operations, Transporting

41

M

42/11, 402/574

B41M 5/155 (2006.01) C08G 61/02 (2006.01)

Patent

CA 1306578

ABSTRACT Disclosed herein are novel multivalent metal- modified salicylic acid resins useful as color- developing agents for pressure-sensitive copying paper. They can each be produced by causing a salicylic acid ester and a styrene derivative to undergo a Friedel- Crafts reaction in the presence of a strong acid catalyst, hydrolyzing the resulting salicylic acid ester resin, and then reacting the thus-obtained salicylic acid resin with a multivalent metal salt.

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