Dyestuff-containing microscopic capsule suspension for...

Details Dyestuff-containing microscopic capsule suspension for... Dyestuff-containing microscopic capsule suspension for...

B - Operations, Transporting

41

M

42/12

B41M 5/00 (2006.01) B41M 5/132 (2006.01) B41M 5/145 (2006.01)

Patent

CA 1174466

- 1 - SPECIFICATION Title of the Invention DYESTUFF-CONTAINING MICROSCOPIC CAPSULE SUSPENSION FOR RECORD MATERIALS Abstract of the Disclosure Dyestuff-containing microscopic capsule suspension for record materials, containing in microscopic capsules a lactone family dyestuff represented by the general formula (I): Image (I) wherein a, b, c and d are each a carbon atom or either one or two atoms of said a, b, c and d are nitrogen atoms and the remaining atoms are carbon atoms, said a, b, c and d may have one or two substituent groups, adjacent a-b, b-c or c-d bond may form another ring, X and Y represent individually a benzene, naphthalene or aromatic heterocyclic ring which may include one or more substituent groups, and X and Y may be the same or different and may be coupled together to form a ring; and a metal ion sequestering agent in the capsules or a liquid medium in which the capsules is suspended.

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