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US 11,884,816 B2Granted
Resin particle
AssigneeFUJIFILM Business Innovation Corp.
InventorsYukiaki Nakamura, Masaru Takahashi, Ryutaro Kembo
Life of this patent
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Abstract
A resin particle includes a binder resin; a fluorescent colorant A; and a colorant B other than the fluorescent colorant A, in which the resin particle includes a region RA in which a content of the fluorescent colorant A is larger than a content of the colorant B and a region RB in which a content of the colorant B is larger than a content of the fluorescent colorant A.
Claims13
A resin particle comprising:
- a binder resin comprising:
- a first binder resin comprising polyurethane;
- and
- a second binder resin that is different than the first binder resin, the second binder resin comprising a styrene-acrylic copolymer or a polyester resin;
- a fluorescent colorant A;
- and
- a colorant B other than the fluorescent colorant A,
- wherein:
- the resin particle includes a sea-island structure comprising:
- a region RA that forms an island structure in which a content of the fluorescent colorant A is larger than a content of the colorant B, wherein the region RA includes the first binder resin;
- and
- a region RB that forms a sea structure in which a content of the colorant B is larger than a content of the fluorescent colorant A, wherein the region RB includes the second binder resin, and
- a ratio VI/VT of a volume average particle diameter VI of the island structure in the sea-island structure to a volume average particle diameter VT of the resin particle is 0.15 or more and 0.80 or less.
10 more elements
Dependencies are inferred from the claim text.