Fluoran derivatives, process for preparation thereof and...

Details Fluoran derivatives, process for preparation thereof and... Fluoran derivatives, process for preparation thereof and...

B - Operations, Transporting

41

M

42/13, 260/359.9

B41M 5/15 (2006.01) B41M 5/327 (2006.01) C07D 493/10 (2006.01) C07D 519/00 (2006.01) C09B 57/02 (2006.01)

Patent

CA 1280433

FLUORAN DERIVATIVES, PROCESS FOR PREPARATION THEREOF AND RECORDING MATERIAL CONTAINING THE SAME ABSTRACT OF THE DISCLOSURE A fluoran derivative useful for a heat-sensitive recording material, having the following general formula I; Image ...I wherein R1 and R2, which may be the same or different, stand for an alkyl group having 1 to 9 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, a phenyl group or a phenyl group substituted by an alkyl group having 1 to 4 carbon atoms, and R3 and R4 , which may be the same or different, stand for an alkyl group having 1 to 6 carbon atoms or a phenyl group or R3 and R4 may form a 5- to 8-membered cycloalkane together with the carbon atom to which they are bonded.

518787

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