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Thermosensitive polymerized lithographic printing plate

A lithographic printing plate and polymerization technology, which is applied in the field of high printing force, can solve the problems of poor adhesion of the plate base, poor storage stability, poor coating performance, etc., and achieve tough coating and solvent resistance Strong, Graphically Beautiful Effects

Active Publication Date: 2009-12-16
LUCKY HUAGUANG GRAPHICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Technologists study various high molecular polymers as film-forming materials, but functional acrylic resins such as the above have the following defects: poor adhesion to the plate base, poor coating performance, poor wear resistance, storage Poor stability, especially with lower run lengths when using UV inks

Method used

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  • Thermosensitive polymerized lithographic printing plate
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  • Thermosensitive polymerized lithographic printing plate

Examples

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Effect test

Embodiment 1

[0039] The present invention includes a support and a thermally polymerized layer, wherein the thermally polymerized layer contains a functional polymer binder (A) having structures i and ii that can be polymerized by ethylenically unsaturated groups; The polymer adhesive structure is as follows:

[0040] i has either of the following two structural (a) (b) units:

[0041] (a) Structural unit with alkali solubility

[0042]

[0043] In the formula, X1 represents -O- or -NR3-, R1 represents -H or -CH3, R2 represents a single bond or a divalent organic bond group, Y1 represents an arylene group, n represents 0 or 1, and R3 represents that it can have a hydrogen atom Or an alkyl group, cycloalkyl group, aryl group or aralkyl group of 1-12 carbon atoms in the substituent; Z1 represents a group with an acidic hydrogen atom, and m represents an integer greater than 1;

[0044] (b) Structural unit of alkali-soluble maleimides

[0045]

[0046] Z represents a group having an ...

Embodiment 2

[0068] The present invention includes: a support and a thermopolymerizable layer, wherein the thermopolymerizable layer contains a functional polymer binder (A) having structures i and ii that can be polymerized by ethylenically unsaturated groups. It also contains unsaturated radically polymerizable monomers and oligomers (B), an infrared absorber (C) capable of absorbing IR rays, and at least one compound (D) capable of generating free radicals.

[0069] Functional polymer adhesive (A)

[0070] Functional polymer adhesive (A) has the structure of structure i and ii as follows:

[0071] i has the following two structural units:

[0072] (a) Structural unit with alkali solubility

[0073]

[0074] In the formula, X1 represents -O- or -NR3-, R1 represents -H or -CH3, R2 represents a single bond or a divalent organic bond group, Y1 represents an arylene group, n represents 0 or 1, and R3 represents that it can have a hydrogen atom Or an alkyl group, cycloalkyl group, aryl ...

Synthetic example 1

[0139] Add 20 g of methyl ethyl ketone and 0.18 g of azobisisobutylcyanide to a 250 ml three-necked flask equipped with a stirrer, a reflux tube, and a dropping funnel. Use a hot water bath to heat to 80°C while passing nitrogen protection. Add dropwise a mixture of 20g methyl ethyl ketone, 3.5g N-(4-hydroxybenzene)methacrylamide, 4.5g N-(4-sulfonamidobenzene)maleimide, 4.5g styrene, 3.0g methacrylic acid The solution was mixed, and the dropwise addition was completed in 2 hours. React at constant temperature for 10 hours. After the reaction was completed, 40 g of methanol was added, cooled, added into 2 L of water with stirring, stirred for 1 hour, filtered and dried to obtain 12.98 g of white solid. The weight-average molecular weight (polystyrene standard) of the high molecular weight polymer measured by silica gel permeation chromatography was 45,000.

[0140] Dissolve 10 grams of the high polymer obtained above in 100 grams of propylene glycol monomethyl ether acetate,...

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Abstract

The invention discloses a heat-sensitive polymerized lithographic printing plate, which includes a support and a thermally polymerized layer, wherein the thermally polymerized layer contains functional polymers with structures i and ii that can be polymerized by ethylenically unsaturated groups agent (A). The advantages of the invention are as follows: the heat-sensitive lithographic printing plate contains a copolymer having the above-mentioned structural units represented by (a), (b), and (c), thereby making the lithographic printing plate of the present invention have strong adhesion and tough coating; The high polymer has good solubility, so the coatability when it is coated on the support is good. The lithographic printing plate of the invention has strong printing resistance, large developing latitude, high anti-alkali film retention rate and strong solvent resistance. Prints with fine images can be obtained when printing with UV inks.

Description

technical field [0001] The present invention relates to a functional polymer and an infrared-sensitive laser lithographic printing plate containing the functional polymer in a thermopolymerization layer. More specifically, it relates to a vinyl polymer and a photosensitive compound that acts on a negative type , The photosensitive layer has good ink affinity, strong adhesion between the photosensitive layer and the substrate, high printing resistance of the imaging layer, and the photosensitive layer has excellent chemical resistance, and is suitable for UV ink printing. Specifically, it relates to a heat-sensitive polymerized lithographic printing plate. Background technique [0002] As a printing plate for direct imaging by laser scanning exposure, the structure available on the market includes a hydrophilic carrier and an active substance that can generate free radicals or Luysic acid on it by laser irradiation The lipophilic thermal resin layer. Negative-working or pos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/004G03F7/09G03F7/033G03F7/021
Inventor 侯文利赵伟建姚新鼎曹蕾柴文俊宋小伟
Owner LUCKY HUAGUANG GRAPHICS
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