Thermal dye bleach construction

Details Thermal dye bleach construction Thermal dye bleach construction

G - Physics

03

C

196/201

G03C 1/83 (2006.01) B41M 5/28 (2006.01) G03C 1/12 (2006.01) G03C 1/498 (2006.01) G03C 1/61 (2006.01)

Patent

CA 2018359

43861CAN1A ABSTRACT THERMAL DYE BLEACH CONSTRUCTION A thermal-dye-bleach construction comprising a thermal nucleophile-generating agent in association with a polymethine dye having a nucleus of general formula (I): Image (I) in which: n is 0, 1, 2 or 3; R1 to R4 independently represent hydrogen atoms, optionally substituted alkyl groups of up to 30 carbon atoms, optionally substituted alkenyl groups of up to 30 carbon atoms or optionally substituted aryl groups of up to 14 carbon atoms; or R1 and R2 together and/or R3 and R4 together may represent the necessary atoms to complete a 5 or 6- membered optionally substituted heterocyclic ring; or one or more of R1 to R4 may represent the necessary atoms to complete an optionally substituted 5 or 6- membered heterocyclic ring fused to the phenyl ring on which the NR1R2 or NR3R4 group is attached; R5 and R6 independently represent hydrogen atoms, tertiary amino groups, optionally substituted alkyl groups of up to 10 carbon atoms, optionally substituted aryl groups of up to 10 carbon atoms, optionally substituted heterocyclic rings comprising up to 6 ring atoms, optionally substituted carbocyclic rings comprising up to 6 carbon atoms or optionally substituted fused ring systems comprising up to 14 ring atoms, and, X? is an anion.

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