Photosensitive composition and photosenpsitive lithographic printing plate

A photosensitive composition and the technology of the composition are applied in the direction of polyhalogenated compound composition, optics, photographic plate-making process of pattern surface, etc., and can solve problems such as inability to achieve plate life

Inactive Publication Date: 2006-12-27
KONICA MINOLTA MEDICAL & GRAPHICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in these technologies, despite the increased speed, sufficient board life cannot be achieved

Method used

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  • Photosensitive composition and photosenpsitive lithographic printing plate
  • Photosensitive composition and photosenpsitive lithographic printing plate
  • Photosensitive composition and photosenpsitive lithographic printing plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0267] Polymer Binder: Synthesis of Acryl Copolymer 1

[0268] Add 30 parts of methacrylic acid, 50 parts of methyl methacrylate, 20 parts of ethyl methacrylate, 500 parts of isopropanol and 3 parts of α, α'-azobisisobutyronitrile (α , α'-azobisisobutylonitrile) and reacted at 800 °C for 6 hours in a poi bath under nitrogen flow. The reaction mixture was then heated at reflux for 1 hour at the boiling point of isopropanol. And then 3 parts of trimethylammonium chloride and 25 parts of glycidyl methacrylate were added thereto and reacted for 3 hours to obtain an acryl copolymer 1 . The weight average molecular weight measured in GPC was about 35,000 and the glass transition temperature (Tg) measured in DSC (differential thermal analysis) was about 85°C.

[0269] Preparation of photosensitive lithographic printing plates

[0270] Preparation of vector

[0271] A 0.3 mm thick aluminum plate (Material No. 1050, H16) was dipped in an aqueous 5% sodium hydroxide solution kept at...

Embodiment 2

[0313] Photosensitive lithographic printing plate samples Nos. 61-90 were prepared similarly to sample No. 1 of Example 1, provided that ethylenically unsaturated monomers and photopolymerization initiators were used as shown in Table 2.

[0314] Comparative Samples No. 17-25 were also prepared similarly to Sample No. 1 of Example 1, provided that an ethylenically unsaturated monomer and a photopolymerization initiator were used as shown in Table 2.

[0315] Sample No.

Ethylenically unsaturated monomer (parts)

Photopolymerization initiator (parts)

record can

(μJ / cm 2 )

Board life (sheet)

61 (this hair

Bright)

M-3(25)

NK Ester 4G(15)

BR1(2.0)

I-2(4.0)

D-5(2.0)

D-7(2.0)

40

150000

62 (this hair

Bright)

M-3(25)

NK Ester 4G(15)

BR6(2.0)

I-2(4.0)

D-5(2.0)

D-7(2.0)

40

150000

63 (this hair

Bright)

M-3(25)

NK...

Embodiment 3

[0327] Photosensitive lithographic printing plate samples Nos. 3-1 to 3-11 were prepared analogously to sample No. 1 of Example 1, with the proviso that photosensitive lithographic printing plate samples Nos. 61-90 were prepared similar to sample No. 1 of Example 1 , provided that the photosensitive layer coating solution 1 was replaced with the following coating solution 3:

[0328] Photosensitive layer coating solution 3

[0329] Ethylenically unsaturated monomer (NK OLIGOMER U-4HA, Shin-Nakamura Kagaku Kogyo Co., Ltd.) 27.0 parts

[0330] Ethylenically unsaturated monomer a 14.0 parts

[0331] Multi-halogen compound (Table 3) 5.0 parts

[0332] Spectrum sensitizing dye d-0 3.0 parts

[0333] Organometallic compound a 4.0 parts

[0334] Acryl copolymer 1 40.0 parts

[0335] Phthalocyanine pigment (MHI 454, Mikuni Shikiso Co.) 6.0 parts

[0336] 2-tert-butyl-6-(3-tert-butyl-2-hydroxy-5-methyl-4-methylphenyl acrylate (SumilyzerGS, Sumitomo-3M Co.) 0.5 parts

[0337] Flu...

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Abstract

A photosensitive composition exhibiting enhanced sensitivity is disclosed, comprising an ethylenically unsaturated monomer, a photopolymerization initiator composition and a polymer binder, wherein the photopolymerization initiator composition contains a polyhalogen compound. There is also disclosed a photosensitive lithographic printing plate comprising the foregoing photosensitive composition on a support having a hydrophilic surface.

Description

technical field [0001] The present invention relates to a photosensitive composition and a photosensitive lithographic printing plate using the same, and more particularly to a photosensitive composition having enhanced sensitivity and excellent print life and a photosensitive lithographic printing plate using the same. Background technique [0002] Generally, the lithographic material is imagewise exposed to harden the exposed areas and after the unexposed areas are washed out, the material is further subjected to washing and finisher gum treatments to obtain a lithographic printing plate. Recently, methods for preparing lithographic printing plates have been investigated, in which laser digital exposure is performed to achieve high resolution and increased definition, followed by development to obtain lithographic printing plates. For example, a system is known in which a photographic material is directly subjected to scanning exposure using an exposure source modulated by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03C1/675G03F1/00
Inventor 松村智之平林和彦
Owner KONICA MINOLTA MEDICAL & GRAPHICS INC
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