Colorant, microcapsule pigment prepared by using the same and ink composition for writing instrument
AssigneeMitsubishi Pencil Company, Limited
InventorShuji Ichikawa
Life of this patent
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Abstract
Provided are a colorant represented by the following Formula (I) which is excellent in a color intensity and a lightfastness, a microcapsule pigment including the colorant, a developer and a chromic temperature controller and an ink composition for writing instruments including the microcapsule pigment: wherein X and Y represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a halogen atom; and X and Y may be identical or different from each other, provided that a case in which both of X and Y are a hydrogen atom is excluded.
Claims6
A blue colorant comprising a leuco dye represented by the following Formula (I):
- wherein X and Y represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a halogen atom;
- and X and Y may be identical or different from each other, provided that a case in which both of X and Y are a hydrogen atom is excluded.
Dependencies are inferred from the claim text.