Lithographic printing plate precursor, plate making method thereof and polyvalent isocyanate compound

A lithographic printing plate and isocyanate technology, which is applied in lithographic printing equipment, printing, printing technology, etc., can solve problems such as printing stains, insufficient printing durability, and poor developability

Active Publication Date: 2013-12-04
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in JP-A-2004-212558, Japanese Patent No. 2938397, JP-A-2000-211262, JP-A-2001-277740, JP-A-2002-29162, JP-A-2002-46361, JP-A -In hitherto known lithographic printing plate precursors described in 2002-137562 and JP-A-2002-326470, the printing durability of the image formed by laser exposure is insufficient and therefore additional improvement is required
In particular, it is difficult to obtain sufficient printing durability in images cured in recording materials capable of being recorded with infrared laser light having a photosensitive wavelength of 760 nm or more
In order to increase printing du

Method used

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  • Lithographic printing plate precursor, plate making method thereof and polyvalent isocyanate compound
  • Lithographic printing plate precursor, plate making method thereof and polyvalent isocyanate compound
  • Lithographic printing plate precursor, plate making method thereof and polyvalent isocyanate compound

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0070] [Preparation method of polymer fine particles]

[0071] The polymer fine particles according to the present invention are composed of a polymer obtained by a reaction between an isocyanate compound and a compound having active hydrogen atoms, and the isocyanate compound includes at least the polyvalent isocyanate compound according to the present invention. Therefore, the polymer fine particles according to the present invention can increase printing durability without concomitantly decreasing developability.

[0072] The polymer fine particles according to the present invention can be combined as in Asashi Kondo, Microcapsule , The Nikkan Kogyo Shimbun, Ltd. (1970) and Tamotsu Kondo, etc., Microcapsule, It is prepared in the same manner as the hitherto known method for forming microcapsules described in detail in Sankyo Publishing Co., Ltd. (1977).

[0073] The polymer fine particles with polyurethane / polyurea walls or polyurethane walls are synthesized by interfacial polym...

Example Embodiment

[0250] Example

[0251] The present invention will be described in more detail with reference to the following examples, but the present invention should not be construed as being limited thereto. In the examples, unless specifically indicated otherwise, with regard to the polymer compound, the molecular weight is expressed as a weight average molecular weight (Mw) and the ratio of the repeating unit is expressed as a mole percentage.

[0252] [Synthesis examples of polyvalent isocyanate adducts NCO-1 to NCO-21]

Example Embodiment

[0253] Synthesis Example 1: Synthesis of NCO-1

[0254] To contain 355.6g (1.60mol) of isophorone diisocyanate ((PDI) and 169.6g (0.40mol) of polyhydroxyphenol compound P-2 having the structure shown below in 470.7g of ethyl acetate To the suspension, a solution containing 471 mg of tin octoate (STANOCT, manufactured by Yoshitomi Pharmaceutical Co., Ltd.) dissolved in 10 g of ethyl acetate was added dropwise during one hour under stirring. After the dropwise addition was completed, stirring was continued for 2 hours and then stirred at 50°C for 3 hours. Thus, a solution (concentration: 50% by weight) of the polyvalent isocyanate adduct NCO-1 was obtained.

[0255] The terminal isocyanate compound obtained above was subjected to dibutyl-ureidation with dibutylamine to determine the weight average molecular weight (as calculated in polystyrene units) and its Mw was 24,400.

[0256] The obtained compound was identified by FT-IR (KBr). The data is shown below. FT-IR(KBr)3416cm -1 , ...

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Abstract

To provide a lithographic printing plate precursor which is capable of undergoing image recording with infrared laser and exhibits high printing durability while maintaining stain resistance and preservation stability, and particularly, to provide a lithographic printing plate precursor capable of undergoing on-press development and a plate making method thereof, the invention is directed to a lithographic printing plate precursor comprising a hydrophilic support having thereon an image-recording layer containing (A) a polymer fine particle, (B) a radical polymerizable compound and (C) an infrared absorbing dye, wherein (A) the polymer fine particle is obtained by a reaction between a polyvalent isocyanate compound which is an adduct of a polyhydric phenol compound having two or more hydroxyl groups in its molecule and isophorone diisocyanate and a compound having an active hydrogen atom.

Description

technical field [0001] The present invention relates to a lithographic printing plate precursor capable of so-called direct plate-making in which direct plate-making is performed using various types of lasers based on digital signals such as from a computer, and in particular, relates to printing durability A lithographic printing plate precursor improved in properties, stain resistance, and storage stability, a plate-making method thereof, and a polyvalent isocyanate compound. Background technique [0002] Solid-state lasers, semiconductor lasers, and gas lasers that emit ultraviolet rays, visible light, or infrared rays having a wavelength of 300 to 1,200 nm having a large output and a small size become readily available, and these lasers are very usable for use based on, for example, data from a computer. Recording light source for data-to-plate. Various studies have been conducted on such various laser beam-sensitive recording materials. In particular, a recording mate...

Claims

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Application Information

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IPC IPC(8): G03F7/00B41N1/14G03F7/004G03F7/027G03F7/035
CPCB41C2210/22B41C2210/04B41C2210/08B41C2210/06B41C1/1008B41C1/1016B41C2201/02B41C2201/04B41C2201/10B41C2201/14B41C2210/10B41C2210/12B41C2210/20B41C2210/24
Inventor 青岛俊荣佐藤宪晃仓本守
Owner FUJIFILM CORP
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