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US 5,516,621 AGranted
Photosensitive microcapsule having increased photosensitive sensitivity
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsMasashi Tsuda, Shigeru Kagayama, Yasuhiro Hattori
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Abstract
The invention relates to a photosensitive microcapsule in which the image forming material comprises at least one of a dyeprecursor, a dye, and a pigment and the photosensitive material changes its mechanical strength by reacting to light. Moreover, the image forming material and the photosensitive material are separated from one another within the microcapsule. Therefore, the photosensitive microcapsule has high photosensitive sensitivity, yet can form an image with high resolution, high color reproduction and high density.
Claims25
A photosensitive microcapsule, comprising:
- an outer shell;
- an image forming part which is a liquid medium in which an image forming material is contained;
- and
- a photosensitive part which is a liquid photosensitive material comprising (a) a member selected from the group consisting of a monomer and an oligomer and (b) an initiator, wherein the image forming material comprises at least one image forming material selected from the group consisting of a dye, a pigment, and a dye precursor, the liquid photosensitive material changes mechanical strength by reacting to light, and said image forming part and said photosensitive part form an emulsion and are separated from one another within said outer shell;
- and wherein said initiator is at least one compound selected from the group consisting of organic peroxide;
- organohalogen compound;
- 2,4,6-substituted-S-triazine;
- 2,4,5-triarylimidazole dimer;
- azo compound;
- dye borate complex;
- iron arene complex;
- titanocene compound;
- and aromatic carbonyl compound.
10 more elements
A photosensitive microcapsule, comprising:
- an outer shell;
- a coloring agent of at least one material selected from the group consisting of a dye, a dye precursor and a pigment dissolved or mixed in a liquid medium;
- and
- a liquid photosensitive material comprising (a) a member selected from the group consisting of a monomer and an oligomer and (b) an initiator, wherein said coloring agent and said photosensitive material are contained within said outer shell as an emulsion and are immiscible in and non-reactive to one another;
- and wherein said initiator is at least one compound selected from the group consisting of organic peroxide;
- organohalogen compound;
- 2,4,6-substituted-S-triazine;
- 2,4,5-triarylimidazole dimer;
- azo compound;
- dye borate complex;
- iron arene complex;
- titanocene compound;
- aromatic carbonyl compound.
10 more elements
A photosensitive microcapsule, comprising:
- an outer shell;
- an image forming part which is a liquid medium in which an image forming material is contained;
- and
- a photosensitive part which is a liquid photosensitive material comprising (a) a member selected from the group consisting of a monomer and an oligomer and (b) an initiator, wherein the image forming material comprises at least one image forming material selected from the group consisting of a dye, a pigment, and a dye precursor, the liquid photosensitive material changes mechanical strength by reacting to light, and said image forming part and said photosensitive part form an emulsion and are separated from one another within said outer shell;
- wherein the photosensitive park is formed as at least one droplet as an inner core suspended in said image forming part.
2 more elements
A photosensitive microcapsule, comprising:
- an outer shell;
- an image forming part which is a liquid medium in which an image forming material is contained;
- and
- a photosensitive part which is a liquid photosensitive material comprising (a) a member selected from the group consisting of a monomer and an oligomer and (b) an initiator, wherein the image forming material comprises at least one image forming material selected from the group consisting of a dye, a pigment, and a dye precursor, the liquid photosensitive material changes mechanical strength by reacting to light, and said image forming part and said photosensitive part form an emulsion and are separated from one another within said outer shell;
- wherein said photosensitive part is formed as at least one small microcapsule encapsulated by an inner shell and suspended in said image forming part.
2 more elements
Dependencies are inferred from the claim text.