Photosensitive resin composition for flexographic printing and flexographic printing original plate

A technology of photosensitive resin and resin composition, which is applied in printing, printing plates, printing machines, etc., and can solve the problems of reduced printing resistance and low water resistance of printing plates

Active Publication Date: 2021-04-09
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] However, the aqueous-developable photosensitive resin compositions described in Patent Documents 1 and 2 have problems in that the water resistance of printing plates using the same is low, or the printing resistance after ink adhesion is reduced.

Method used

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  • Photosensitive resin composition for flexographic printing and flexographic printing original plate
  • Photosensitive resin composition for flexographic printing and flexographic printing original plate
  • Photosensitive resin composition for flexographic printing and flexographic printing original plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0174] Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these.

[0175]

[0176] In a pressure-resistant reaction vessel equipped with a stirring device and a jacket for temperature regulation, 125 parts by mass of water and (α-thio(1-nonylphenoxy)methyl-2 - 2 parts by mass of ammonium salt "Adeka Reasoap" (manufactured by Asahi Denka Industries) of (2-propenyloxy)ethoxy-poly(oxy-1,2-ethanediyl), the internal temperature was raised to 80°C, A monomer mixture containing 10 parts by mass of styrene, 60 parts by mass of butadiene, 23 parts by mass of butyl acrylate, 5 parts by mass of methacrylic acid and 2 parts by mass of acrylic acid, and 2 parts by mass of tertiary dodecyl mercaptan The mixed solution, and 28 parts by mass of water, 1.2 parts by mass of sodium persulfate, 0.2 parts by mass of sodium hydroxide and (α-thio(1-nonylphenoxy)methyl-2-(2-propenyloxy ) ethoxy-poly(oxy-1,2-ethanediyl) ammonium salt 2 parts by...

manufacture example 2

[0179]

[0180] The water dispersion of the hydrophilic copolymer (A) used in Example 9 was obtained in the same manner as in Production Example 1, except that sodium dodecylbenzenesulfonate, which is a non-reactive emulsifier, was used instead of the reactive emulsifier. liquid. Using this, it carried out similarly to manufacture example 1, and obtained the mixed dry material of a hydrophilic copolymer (A) and a plasticizer (F).

manufacture example 3

[0181]

[0182] After obtaining the aqueous dispersion of the hydrophilic copolymer (A) in the same manner as in Production Example 1, with respect to 100 parts by mass of the hydrophilic copolymer contained in the aqueous dispersion, a plasticizer component (F ) of liquid polybutadiene [LBR352] 10 mass parts and liquid acrylonitrile-butadiene copolymer (NBR) carboxyl modified product [DN-601: Japan Zeon] 5 mass parts liquid, while mixing It dried under reduced pressure at 80 degreeC, and obtained the mixed dried material containing a hydrophilic copolymer (A) and a plasticizer (F).

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Abstract

A photosensitive resin composition for flexographic printing, which contains at least (A) hydrophilic copolymer, (B) elastomer, (C) polymerizable unsaturated monomer and (D) photopolymerization initiating material, in the resin In the cross section of the cured product of the composition, the phase area S including the hydrophilic copolymer (A) A 15% or more and 60% or less, in the phase containing the hydrophilic copolymer (A), the phase area is 3 μm 2 Above and below 100μm 2 The ratio of the phase occupied is 20 (area %) or more.

Description

technical field [0001] The present invention relates to a photosensitive resin composition for flexographic printing used for a photosensitive layer of a flexographic printing original plate and a printing plate, and a flexographic printing original plate using the photosensitive resin composition for flexographic printing. Background technique [0002] Flexographic printing is a type of letterpress printing. The printing plate uses soft materials such as rubber and synthetic resin, so it has the advantage that it can be used for various objects to be printed. [0003] Printing plates used in flexographic printing have conventionally used a negative film for plate making; and, computer plate-making technology (hereinafter, CTP technology) that directly draws the information processed on a computer in the form of a printing plate and creates a relief. In recent years, CTP Technology is gradually becoming mainstream. [0004] The original plate of the flexographic printing pl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/033G03F7/00G03F7/004G03F7/027
CPCG03F7/027G03F7/033G03F7/09B41F5/24B41N1/12G03F7/031G03F7/2004G03F7/2022G03F7/2024G03F7/322G03F7/40
Inventor 斋藤秀夫本庄崇文
Owner ASAHI KASEI KK
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