Color-developing sheet for pressure-sensitive recording sheets

Details Color-developing sheet for pressure-sensitive recording sheets Color-developing sheet for pressure-sensitive recording sheets

B - Operations, Transporting

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B41M 1/36 (2006.01) B41M 5/155 (2006.01) C07C 317/22 (2006.01) C07F 3/00 (2006.01) C07F 15/04 (2006.01)

Patent

CA 1125506

Title of the Invention COLOR-DEVELOPING SHEET FOR PRESSURE-SENSITIVE RECORDING SHEETS Abstract of the Disclosure A color-developing sheet for pressure-sensitive recording sheets, said sheet comprising as a color-develop- ing agent at least one 2,2'-bisphenolsulfone nickel salt selected from compounds of the following formula Image ( II) and Image wherein R3, R4, R5, R6, R7 and R8 are identical or different, and represent a hydrogen atom, a halogen atom, an alkyl group containing 1 to 10 carbon atoms, a cycloalkyl group containing 3 to 10 carbon atoms, an aralkyl group containing - 1 - 7 to 11 carbon atoms, or a phenyl group, or a mixture of at least one 2,2'-bisphenolsulfone nickel salt of the above formulae (II) and (III) and at least one 2,2'-bisphenolsulfone zinc salt of the following formula Image (I) wherein R1 and R2 are the same as R3 through R8 defined above. - 1'-

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