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Lithographic printing plate precursor, lithographic printing method, and novel cyanine dye

A lithographic printing plate, cyanine dye technology, applied in lithographic printing equipment, printing, organic dyes, etc., can solve problems such as negative effects of printing materials, achieve the effect of preventing scum, excellent on-machine developing performance, and preventing wet water coloring

Active Publication Date: 2007-03-07
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since insoluble dyes remain in ink and dampening water or dyes react with ink components and dampening water to precipitate, thereby forming scum, etc., there is a problem that the formed dyes or dyes that are not decomposed or decolorized by exposure give dampening water color, negatively impacting the finished printed material

Method used

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  • Lithographic printing plate precursor, lithographic printing method, and novel cyanine dye
  • Lithographic printing plate precursor, lithographic printing method, and novel cyanine dye
  • Lithographic printing plate precursor, lithographic printing method, and novel cyanine dye

Examples

Experimental program
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preparation example Construction

[0231] The preparation methods of microcapsules include, for example, methods using coacervation described in U.S. Patent Nos. 2,800,457 and 2,800,458, methods using interfacial polymerization described in U.S. Patent No. 3,287,154, JP-B-38-19574 and JP-B-42-446, U.S. Methods using deposition of polymers described in patents 3,418,250 and 3,660,304, methods using isocyanate polyol wall materials described in US Patent 3,796,669, methods using isocyanate wall materials described in US Patent 3,914,511, US Patents 4,001,140, ​​4,087,376, and 4,089,802 The method described in using urea-formaldehyde-type or urea-formaldehyde-resorcinol-type wall-forming materials, using wall materials, such as the method of melamine-formaldehyde resin or hydroxycellulose described in U.S. Patent 4,025,445, by The in situ process of monomer polymerization described in JP-B-36-9163 and JP-B-51-9079, the spray drying method described in British Patent 930,422 and US Patent 3,111,407, and the method d...

Embodiment 1

[0327] Synthesis Example 1: Synthesis of Specific Cyanine Dye (Compound (IR-32)) and (Compound (IR-26))

[0328] A mixture of 37.9 g of 3-methoxypropanol and 53.9 g of p-toluenesulfonyl chloride in 50.2 g of pyridine was stirred for 3 hours while maintaining a reaction temperature of 0-10° C., then extracted with ethyl acetate to obtain 91.2 g (89% yield) of 3-methoxypropyl tosylate.

[0329] A mixture of 55 g of 3-methoxypropyl tosylate thus obtained and 39.0 g of 2,3,3,5-tetramethyl-3-H-indole was stirred at 120° C. for 3 hours, followed by Cool to room temperature. Then, 47.7 g of 2,5-bis[(phenylamino)methylene]cyclopentylene diphenylammonium tetrafluoroboric acid, 23.0 g of acetic anhydride, 56.9 g of triethylamine and 220 ml of 2-propanol, and the mixture was stirred at 80°C for 3 hours. After the reaction was completed, the mixture was cooled to room temperature, and 90 ml of water was added thereto. Crystals thus deposited were collected by filtration and washed wel...

Embodiment 2

[0344] Synthesis Example 2: Synthesis of Specific Cyanine Dye (Compound (IR-2))

[0345] A mixture of 2-[2-(2-methoxyethoxy)ethoxy]ethyl toluenesulfonate and 79g of 2,3,3,5-tetramethyl-3-H-indole Stir at 120°C for 3 hours, then cool to room temperature. Then, 120.4 g of 2,5-bis[(phenylamino)methylene]cyclopentylenediphenylammonium tetrafluoroboric acid, 46.5 g of acetic anhydride, 115.1 g of triethylamine, and 1.1 liters of tetrafluoroboric acid were added thereto. 2-propanol, and the mixture was stirred at 80 °C for 3 hours. After the reaction was completed, the mixture was cooled to room temperature and 1.5 L of DMAc was added thereto. Add the reaction solution dropwise to the KPF containing 2.2kg 6 , 6 liters of DMAc and 24 liters of water in a mixed solution. Then, the crystals thus deposited were collected by filtration and washed sufficiently with water to obtain 195.7 g (yield 85%) of a specific cyanine dye (IR-2).

[0346] For the specific cyanine dye (IR-2) thus ...

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Abstract

A lithographic printing plate precursor comprising a support and an image recording layer, the image recording layer containing (A) a cyanine dye and removable with at least one of printing ink and an aqueous component, the cyanine dye containing a solvent removable Soluble groups and have maximum absorption in the infrared wavelength region.

Description

technical field [0001] The present invention relates to a lithographic printing plate precursor, a lithographic printing method using the lithographic printing plate precursor and a novel cyanine dye preferably used in the image recording layer of the lithographic printing plate precursor. More specifically, the present invention relates to a lithographic printing plate precursor capable of so-called direct plate-making, which can be directly plate-produced by, for example, laser scanning having a wavelength of 300-1,200 nm on the basis of a digital signal such as a computer; A novel cyanine dye preferably used in the lithographic printing plate precursor, and a lithographic printing process wherein said lithographic printing plate precursor is directly developed on-press for printing without a development treatment step. Background technique [0002] In general, lithographic printing plates consist of oleophilic image areas that accept ink during printi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/09G03F7/004
CPCC09B23/0041C09B23/0066C09B23/086B41C1/1008B41C1/1016B41C2201/02B41C2201/04B41C2201/06B41C2201/10B41C2201/12B41C2201/14B41C2210/04B41C2210/08B41C2210/20B41C2210/22B41C2210/24
Inventor 岩井悠大桥秀和嶋田和人
Owner FUJIFILM CORP
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