JP2000155417A - Photosensitive resin composition and its manufacture and printing plate material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the photosensitive resin material for a flexographic printing plate developable without adding a surfactant and an alkali metal salt into a developing solution and good in image reproducibility. SOLUTION: The photosensitive resin composition comprises (A) a polymer obtained from water-dispersible latex, (B) a hydrophilic photopolymerizable monomer, and (C) rubber, and (D) a photopolymerization initiator, and it is manufactured by mixing (A) the water-dispersible latex with (B) the hydrophilic photopolymerizable monomer to form the (E) component and then, kneading this (E) component with the (C) rubber and the (D) photopolymerization initiator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photosensitive resin composition for a printing plate and a printing plate material using the same, and more particularly to a water-developable flexographic printing plate material.

[0002]

2. Description of the Related Art A photosensitive resin composition in which an elastomer such as chlorinated rubber, styrene-butadiene block copolymer, polyurethane or the like is used as a carrier resin component, and an ethylenically unsaturated compound and a photopolymerization initiator are blended, is used. Utilizing the characteristics, it is useful as a flexographic printing plate material, and is disclosed in U.S. Pat. No. 2,948,611 and U.S. Pat.
And many proposals, such as Japanese Patent Publication No. Sho 51-43374.

Since such a photosensitive resin solid printing plate requires halogenated hydrocarbon development, development of a photosensitive resin solid flexographic printing plate material which can be developed with water has been desired and proposed.

[0004] One such method is disclosed in US Pat.
No. 9, U.S. Pat. No. 5,372,913, U.S. Pat.
No. 4172 proposes a method in which a hydrophilic polymer such as a carboxylated nitrile rubber and a hydrophobic polymer such as a nitrile rubber are contained in a composition. However, there is a problem that development cannot be performed unless some additive is added to water such as alkaline water or surfactant water.

Also, US Pat. No. 4,275,142, US Pat. No. 4,272,608, JP-A-51-63903, JP-A-53-10648, and JP-A-61-22.
No. 339 proposes a photosensitive resin composition containing a polymer having a carboxyl group in which a metal salt or an ammonium salt is formed. However, the composition is liquid, or does not have sufficient water resistance when used as a printing plate, or lacks mechanical strength during printing,
There is a problem that development cannot be performed unless the developing solution is prepared by adding some additives to water such as alkaline water or surfactant water.

Among the methods for forming a salt structure, US Pat. No. 5,348,844, US Pat. No. 5,350,661, US Pat. No. 5,229,434 and Japanese Patent Publication No. 5-6178 disclose water-dispersed latex polymers having a carboxyl group. A method has been proposed in which the microgel particles form a salt structure with ammonium, and as a result, achieve both water developability and water resistance. However, because there is not enough printing strength to withstand flexographic printing, or because it contains internally crosslinked particles,
There was a problem that the gel particles remained or detached in the form of particles during the development, and the relief edge after the water development had irregularities, which reduced the image reproducibility of the minute relief.

[0007]

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a flexographic printing plate which can be developed without adding an additive such as a surfactant or an alkali metal salt to a developer and has good image reproducibility. It is an object to propose a photosensitive resin composition.

[0008]

That is, the photosensitive resin composition of the present invention mainly has the following constitution in order to solve the above-mentioned problems. That is, “(A) a polymer obtained from an aqueous dispersion latex, (B) a hydrophilic photopolymerizable monomer,
A photosensitive resin composition comprising (C) a rubber and (D) a photopolymerization initiator. ".

The method for producing a photosensitive resin composition of the present invention mainly has the following constitution in order to solve the above problems. That is, "(A ') a water-dispersed latex and (B) a hydrophilic photopolymerizable monomer are mixed into a component (E), and then the component (E), a rubber (C) and a photopolymerization initiator (K) are kneaded. A method for producing a photosensitive resin composition. "

Further, the printing plate material of the present invention mainly has the following constitution in order to solve the above problems. That is,
"A photosensitive resin composition comprising (A) a polymer obtained from an aqueous dispersion latex, (B) a hydrophilic photopolymerizable monomer, (C) a rubber, and (D) a photopolymerization initiator on a support. Printing plate material characterized by being coated with a photosensitive layer. "

[0011]

Embodiments of the present invention will be described below.

The (A ′) water-dispersed latex in the present invention is obtained by dispersing polymer particles in water as a dispersoid, and (A) the polymer obtained from the water-dispersed latex is:
(A ') The polymer itself obtained by removing water from the water-dispersed latex.

The polymer obtained from the water-dispersed latex which is the component (A) constituting the photosensitive resin composition of the present invention is dispersed in the (A ') water-dispersed latex by the electric repulsion of particles. This charge is caused by ionization or adsorption of an emulsifier, protective colloid, polymer or the like.

The water-dispersed latex (A ') becomes a polymer obtained from the water-dispersed latex (A) when water is evaporated, and has a property of forming a continuous film. Among polymers obtained from the water-dispersed latex, those having high crosslink density in the particles do not easily form a continuous film, and therefore those not internally crosslinked or those having a low crosslink density in the particles are preferably used.

Specifically, polybutadiene latex,
Natural rubber latex, styrene-butadiene copolymer latex, acrylonitrile-butadiene copolymer latex, polychloroprene latex, polyisoprene latex, polyurethane latex, methyl methacrylate-butadiene copolymer latex, vinylpyridine polymer latex, butyl polymer latex And latex polymers such as thiochol polymer latex and acrylate polymer latex, and polymers obtained by copolymerizing these polymers with other components such as acrylic acid and methacrylic acid. Among them, a water-dispersed latex polymer containing a butadiene skeleton or an isoprene skeleton in a molecular chain is preferably used from the viewpoint of hardness. Specifically, polybutadiene latex, styrene-butadiene copolymer latex, acrylonitrile-butadiene copolymer latex, methyl methacrylate-butadiene copolymer latex, and polyisoprene latex are preferred.

The hydrophilic photopolymerizable monomer of the component (B) of the present invention has a function of preventing the component (A) from aggregating. That is, it is intended to prevent aggregation of the particles by forming a film of the component (B) on the particle surface of the component (A). Therefore, the component (A)
It is preferable to have a form dispersed in the component (B).

In the present invention, the component (A) has the function of preventing the component (A) from aggregating.
A hydrophilic monomer is used as a component. In the present invention, the hydrophilic monomer refers to a compound having an ethylenically unsaturated bond having the following structure in the molecular structure.

Examples include those having a polyalkylene glycol in the monomer structure, those having a carboxyl group, those having a hydroxyl group, and those having a phosphoric acid group.

Specifically, as a monomer having a polyalkylene glycol, diethylene glycol di (meth)
Polyethylene glycol di (meth) acrylate such as acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, dipropylene glycol dimethacrylate, tripropylene glycol di (meth) acrylate, tetrapropylene glycol di (meth) acrylate ) Acrylates such as polypropylene glycol di (meth) acrylate, phenoxydiethylene glycol (meth) acrylate,
Phenoxypolyethylene glycol (meth) acrylates such as phenoxytriethylene glycol (meth) acrylate, phenoxytetraethylene glycol (meth) acrylate, and phenoxypentaethylene glycol (meth) acrylate, phenoxydipropylene glycol (meth) acrylate, and phenoxytripropylene glycol (meth) A) phenoxypolypropylene glycol (meth) acrylates such as acrylates and phenoxytetrapropylene glycol (meth) acrylate; and polyethylene glycol polypropylene glycol di (meth) acrylate, cresyl polyethylene glycol (meth) acrylate, and nonylphenoxy polyethylene glycol (meth) acrylate , And the like.

As monomers having a hydroxyl group, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 3-chloro-2-hydroxypropyl (meth) acrylate, β -Hydroxy-β '-(meth) acryloyloxyethyl phthalate, 2-hydroxy-3-acryloyloxypropyl (meth) acrylate and the like.

As a monomer having a carboxyl group, β
-Carboxyethyl (meth) acrylate, mono (meth) acryloyloxyethyl succinate, monohydroxyethyl phthalate (meth) acrylate and the like.

As the monomer having a phosphate group, 2- (meth) acryloyloxy acid phosphate, tris (acryloyloxy) phosphate, (meth) acryloyloxyethyl acid phosphate, caprolactone-modified 2- (meth) acryloyloxyethyl acid phosphate, And diphenyl-2- (meth) acrylolyloxyethyl phosphate. In addition,
Here, (meth) acrylate is ...
It means methacrylate or ... acrylate.

Among these, those having a polyalkylene glycol in the monomer structure, those having a carboxyl group, those having a hydroxyl group, and those having a phosphoric acid group have a high effect of preventing the aggregation of the component (A). It is preferably used from the point of view.

The content of the component (B) is as follows:
It is preferably 10 to 200 parts by weight based on 00 parts by weight. When the content is 10 parts by weight or more, a product having satisfactory image reproducibility without insufficient crosslinking density can be obtained.
When the amount is not more than part by weight, the relief does not become brittle, and the component (B) does not separate from the composition over time.

In the present invention, a hydrophobic monomer can be added, if necessary, as long as the effects of the present invention are not impaired. The hydrophobic monomer is generally a monomer having no functional group having strong polarity in the monomer, and is a monomer having low solubility in water or ethanol.

Specifically, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, isoamyl (meth) acrylate, 2-ethylhexyl (meth)
Alkyl (meth) acrylates such as acrylate, lauryl (meth) acrylate and stearyl (meth) acrylate; cycloalkyl (meth) acrylates such as cyclohexyl (meth) acrylate; halogens such as chloroethyl (meth) acrylate and chloropropyl (meth) acrylate Alkyl (meth) acrylate, methoxyethyl (meth) acrylate, ethoxyethyl (meth) acrylate, butoxyethyl (meth) acrylate, etc., alkoxyalkyl (meth) acrylate, phenoxyethyl (meth) acrylate, nonylphenoxyethyl (meth) acrylate And phenoxyalkyl (meth) acrylates.

When these hydrophobic monomers are added, the content is preferably 200 parts by weight or less based on 100 parts by weight of the component (A). When the content is 200 parts by weight or less, water developability is excellent and a good relief can be obtained.

As the rubber as the component (C), those known as general-purpose rubbers and elastomers, specifically, butadiene rubber, nitrile rubber, acrylic rubber, epichlorohydrin rubber, urethane rubber, isoprene rubber, styrene isoprene rubber, Styrene butadiene rubber, ethylene-propylene copolymer, chlorinated polyethylene and the like can be mentioned. If these rubber components are not added, the rubber elasticity of the photosensitive resin composition is increased and the aqueous ink resistance cannot be exhibited.

The content of the component (C) is preferably 20 to 300 parts by weight based on 100 parts by weight of the component (A). When the content is 20 parts by weight or more, the water resistance of the printing plate is good, the rebound resilience is reduced, and the printing quality is not likely to be reduced, which is preferable. When the content is 300 parts by weight or less, water developability is good and preferable.

It is preferable that the ratio of the total weight parts of the components (A) and (B) to the weight parts of the component (C) is 1 or more. When it is 1 or more, the water development speed is high, and practical use can be achieved.

In the photosensitive resin composition of the present invention, a photopolymerization initiator is added as the component (D). Any photopolymerization initiator can be used as long as it can polymerize a polymerizable carbon-carbon unsaturated group by light. Among them, those having a function of generating radicals by self-decomposition or hydrogen abstraction by light absorption are preferably used. Examples include benzoin alkyl ethers, benzophenones, anthraquinones, benzyls, acetophenones, diacetyls, and the like. The compounding amount of the photopolymerization initiator is preferably in the range of 0.1 to 50 parts by weight based on 100 parts by weight of the component (A). 0.1
When the amount is not less than the weight part, the image reproduction is good without reducing the starting efficiency. When the amount is 50 parts by weight or less, the sensitivity is not too high, and the exposure time can be easily controlled.

A plasticizer can be added to the photosensitive resin composition of the present invention. The plasticizer is not particularly limited as long as it generally has the property of softening the plate material, but has good compatibility with the polymer component such as the component (A) or (C). Are preferred. More preferably, it is a polyene compound which is liquid at room temperature or a compound having an ester bond. Examples of the polyene compound which is liquid at room temperature include liquid polybutadiene, polyisoprene, and maleic and epoxidized compounds in which their terminal groups or side chains are modified. Examples of the compound having an ester bond include a phthalate, a phosphate, a sebacate, an adipate, and a molecular weight of 1,000 to 3,
000 polyesters.

When these plasticizer components are added, the amount is preferably 0 to 100 parts by weight based on 100 parts by weight of the component (A) from the viewpoint of ensuring sufficient strength as a solid plate before photocrosslinking.

In order to increase the thermal stability of the photosensitive resin composition of the present invention, a conventionally known polymerization inhibitor can be added. Preferred polymerization inhibitors include phenols, hydroquinones, catechols and the like. The amount of these components is 0.001 to the total photosensitive resin composition.
It is common to use in the range of ５5% by weight.

Further, as other components, dyes, pigments, surfactants, defoamers, ultraviolet absorbers, fragrances, and the like can be added.

In the photosensitive resin composition of the present invention, the polymer obtained from the water-dispersed latex as the component (A) comprises
It is preferable to have a form dispersed in a hydrophilic monomer as a component. By having such a form, polymers obtained from the aqueous dispersion latex of the component (A) can be present in the composition without fusing each other.

The form of these photosensitive resin compositions can be observed with an electron microscope. After irradiating the photosensitive resin composition with ultraviolet rays and photocuring, cut into thin sections having a thickness of about 200 μm, and, if necessary, perform osmium staining or phosphotungsten staining. The morphology of the object can be observed.

As a method for producing the photosensitive resin composition of the present invention, it is preferable to prepare a mixture of the components (A ') and (B) as the component (E). By doing so, a state is created in which the component (B) is adsorbed on the component (A '), and fusion of the component (A) can be prevented.

The photosensitive resin composition can be obtained by dewatering the components (E), (C) and (D) while kneading them in a kneading facility.

After the component (E) is dehydrated by a dryer, the components (C) and (D) are kneaded with a kneading equipment such as an extruder or a kneader to obtain a photosensitive resin composition. . From the viewpoint of productivity, a method of first dehydrating the component (E) with a dryer is preferable.

Examples of the kneading equipment include, but are not particularly limited to, a twin-screw extruder, a single-screw extruder, a kneader, and a Banbury mixer.

This photosensitive resin composition is melt-extruded on a support coated with an adhesive by an extruder, and a cover film coated with an anti-adhesion layer is brought into close contact with the photosensitive layer to form a photosensitive material for a printing plate. Resin plate can be obtained. Alternatively, a photosensitive resin plate for a printing plate can be obtained by sandwiching the photosensitive resin composition between the support and the cover film and pressing the photosensitive resin composition to a required thickness using a hot press or the like. As the support, a metal sheet such as steel, stainless steel, and aluminum, a plastic sheet such as polyester, and a synthetic rubber sheet such as styrene-butadiene rubber are preferably used. The thickness of the photosensitive layer is 0.01 to 10 mm
It is preferable to form it in the thickness of. If it is less than 0.01 mm, the relief depth is insufficient, and it cannot be used as a flexographic printing plate. If it is larger than 10 mm, the plate material becomes very heavy, and it is practically difficult to use it as a printing plate.

In order to form a relief image for printing on the photosensitive resin plate thus obtained, first, a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, a metal halide, which can irradiate a wavelength of 300 to 400 nm from the support side. Ultraviolet light is irradiated by a lamp, a xenon lamp, a carbon arc lamp, and a chemical lamp, and then, a negative or positive original film is adhered to the photosensitive layer from which the cover film has been peeled off, and then irradiated with ultraviolet light to perform photocuring by photopolymerization.

Next, a relief image can be formed on the support by eluting the unpolymerized portion with a spray developing device using water or a brush type washing machine. After drying, the printing plate material can be obtained by actinic light treatment.

The photosensitive resin composition of the present invention is most suitably used for flexographic printing, but may also be used for resin relief printing, lithographic printing, intaglio printing, stencil printing, and photoresist. It is possible.

[0046]

The present invention will be described below in detail with reference to examples.

(Synthesis Example 1) 100 parts by weight of water as a raw material
0.2 parts by weight of sodium dodecylbenzenesulfonate,
3 parts by weight of polyoxyethylene nonylphenyl ether,
0.3 parts by weight of potassium persulfate, 0.2 parts by weight of t-dodecyl mercaptan, 29 parts by weight of methyl methacrylate, 1 part by weight of methacrylic acid, and 70 parts by weight of butadiene were added at 50 ° C.
The reaction was carried out for 0 hour to obtain a water-dispersed latex rubber having a number average particle size of 140 nm, a glass transition temperature of -52 ° C, and a solid concentration of 50.5%.

(Synthesis Example 2) As a raw material, 65 parts by weight of water
1.3 parts by weight of disproportionated potassium rosinate, 1.7 parts by weight of potassium oleate, 1.
5 parts by weight, t-dodecyl mercaptan 0.05 part by weight,
0.1 parts by weight of paramenthane hydroperoxide, 0.003 parts by weight of iron sulfate, 0.006 parts by weight of sodium ethylenediaminetetraacetate, 0.005 parts by weight of sodium formaldehyde sulfoxylate, 1.2 parts by weight of potassium sulfate, butadiene 100 Polymerization temperature 5 ° C using parts by weight
At low temperature. The polymerization conversion was about 60%. An aqueous dispersion latex rubber having a number average particle diameter of 350 nm and a solid content of 55% was obtained.

(Synthesis Example 3) The procedure of Synthesis Example 1 was repeated except that methyl methacrylate was changed to 50 parts by weight and butadiene was changed to 50 parts by weight.
60 nm, glass transition temperature -27 ° C, solid content concentration 50.
A 0% water-dispersed latex rubber was obtained.

(Synthesis Example 4) In Synthesis Example 1, 24 parts by weight of methyl methacrylate, 1 part by weight of acrylic acid instead of methacrylic acid and 75 parts by weight of butadiene were used.
Others are reacted by the same method, and the number average particle diameter is 180 n.
m, an aqueous dispersion latex rubber having a solid content of 50.5% was obtained.

(Example 1) First, 33.6 parts by weight of the synthesis example 1 as the component (A ') (solid content (as the component (A)))
17 parts by weight) and 14.5 parts by weight (solids content of 8 parts by weight) of Synthesis Example 2, 16 parts by weight of phenoxy polyethylene glycol acrylate as the component (B), glycerin polyether polyol, succinic anhydride, and 2-hydroxy 14 parts by weight of a polycondensate of ethyl acrylate are mixed in advance,
The component obtained by evaporating water for 2 hours with a dryer heated to 120 ° C. was defined as component (E). On the other hand, 20 parts by weight of a polybutadiene rubber as the component (C) (“N
(ipol "1220L) and 20 parts by weight of nitrile rubber (" Nipol "1042 manufactured by Zeon Corporation) were kneaded for 10 minutes by a Rabo Kneader Mill (manufactured by Toshin Co., Ltd.) having a capacity of 200 ml and heated to 140 ° C. ,
(E) Ingredient is put into a lab kneader mill, and further 10
Kneaded for minutes. Thereafter, 1 part by weight of a photopolymerization initiator as a component (D), 2 parts by weight of dioctyl phthalate as a plasticizer, and 0.1 part by weight of hydroquinone monomethyl ether as a polymerization inhibitor were added and kneaded for 5 minutes. A composition was obtained.

The photosensitive resin composition thus obtained was coated on a 125 μm polyethylene terephthalate film coated in advance with a polyester-based adhesive,
μm polyethylene terephthalate film is sandwiched between a cover film in which a polyvinyl alcohol-based polymer is applied in advance, and pressed by a press machine heated to 150 ° C. so that the thickness of the photosensitive resin layer becomes 3 mm. I got

When the photosensitive resin layer was observed with an electron microscope, it was confirmed that the polymer particles obtained from Synthesis Example 1 of the component (A) were dispersed in the component (B).

The photosensitive resin printing plate was placed on the support side 2
Exposure was performed for 1 minute from a distance of 15 cm using an exposure apparatus in which 15 0W chemical lamps were arranged. Then, the cover film was peeled off, and a negative film for evaluating image reproducibility (150% line, 3% halftone dot, 200 μm diameter independent point, 50 μm width) was formed on the photosensitive resin layer.
(with a thin wire) with vacuum, and use the same chemical lamp for 10
Exposure for a minute. After completion of the exposure, development was performed with a brush-type washing machine (liquid temperature 40 ° C.) containing water. 700 μm in 9 minutes
Was formed. Thereafter, water was removed with a dryer heated to 60 ° C. Thereafter, post-exposure was performed with actinic light to obtain a printing plate. When the formed image was visually evaluated, it was found that the image was faithfully reproduced on the negative film.

This printing plate had a rebound resilience of 32%, a water swelling ratio of 1.8%, and a Shore A hardness of 57.

Using this printing plate, a printing test was conducted on a 100,000 sheet using an aqueous ink with a flexographic printing machine, and a good printed product was obtained. In this case, if the printed matter was printed as negative, it was determined that the printed matter was good.

Table 1 shows the composition of this printing plate, and Table 2 summarizes the results of the development speed, image reproducibility, water swelling ratio, Shore A hardness, rebound resilience, and flexographic printing test.

[0058]

[Table 1]

[0059]

[Table 2]

(Examples 2 to 7, Comparative Examples 1 and 2) A printing plate material was obtained in the same manner as in Example 1 using the composition shown in Table 1. The obtained printing plate material was exposed in the same manner as in Example 1, and was developed so that the relief depth became about 700 μm. Table 2 shows the results of the development speed, image reproducibility, water swelling ratio, Shore A hardness, rebound resilience, and flexographic printing test in the same manner as in Example 1.
It is summarized together.

In Examples 2 to 6, the photosensitive resin layer was observed with an electron microscope in the same manner as in Example 1.
It was confirmed that the polymer particles obtained from Synthesis Example 1 of the component were in a form dispersed in the component (B). (Morphological observation) The composition of Example 7 was exposed to the chemical lamp used in Example 1 for 5 minutes from the support and 10 minutes from the photosensitive resin after peeling off the cover film.
Thereafter, a sample having a thickness of about 200 nm was prepared by a frozen ultrathin sectioning method, and the sample was transferred to a transmission electron microscope (H-Hitachi).
(Model 600). The results are shown in FIG. 1 (magnification 40000).

As can be seen from FIG. 1, particles of the water-dispersible latex rubber (component (A)) (spherical component of about 200 nm in the drawing) are contained in the hydrophilic monomer (white portion) as the component (B). ) Is observed.

Since the structural part in which the component (A) is present in the component (B) is hydrophilic, it is considered that water developability is exhibited by having this structure.

Comparative Example 3 A composition was prepared in the same manner as in Example 1 by the following method. A Labo Kneader Mill (manufactured by Toshin Co., Ltd.) was heated to 140 ° C., and the component (C) was added thereto and kneaded for 10 minutes. Here,
The component (A '), Synthesis Example 1, was dried with a dryer in advance to remove water, and then added and kneaded. Synthetic Example 2 was similarly dried and then added and kneaded. Thereafter, a liquid in which two kinds of the component (B) were previously mixed was added and kneaded. Initially, the composition slipped in the lab kneader mill and did not mix well, but gradually kneaded. Next, the component (D) and other additives were added and kneaded to obtain a composition.

A photosensitive resin plate was obtained in the same manner as in Example 1, and then exposed and developed in the same manner as in Example 1 to obtain a printing plate.

When the printing plate was viewed, a large number of gel particles were present on the surface washed out by development. This is considered that the water-dispersed latex polymer was aggregated by drying. Further, it was found that gel-like particles were removed at some points of the relief, and the relief was not reproduced as in the negative film.

[0067]

According to the present invention, a photosensitive resin composition for a flexographic printing plate which can be developed without adding an additive such as a surfactant or an alkali metal salt to a developer and has good image reproducibility can be provided.

[Brief description of the drawings]

FIG. 1 is a transmission electron micrograph (magnification: 40,000 times) of the composition of Example 7 after exposure.

Claims (11)

[Claims] 1. A photosensitive resin containing (A) a polymer obtained from an aqueous dispersion latex, (B) a hydrophilic photopolymerizable monomer, (C) a rubber, and (D) a photopolymerization initiator. Composition. 2. Component (A) and 100 parts by weight of component (B)
10 to 200 parts by weight of component, 20 to 300 component (C)
2. The photosensitive resin composition according to claim 1, wherein the component (D) is 0.1 to 50 parts by weight. 3. The total weight part of component (A) and component (B) is:
The photosensitive resin composition according to claim 1, wherein the ratio is 1 or more with respect to part by weight of the component (C). 4. The photosensitive resin composition according to claim 1, wherein the polymer in the component (A) has a butadiene skeleton or an isoprene skeleton in a molecular chain. 5. The polymer of component (A) is polybutadiene, styrene-butadiene copolymer, acrylonitrile-butadiene copolymer, methyl methacrylate-butadiene copolymer, polyisoprene, and copolymers thereof with other polymerizable monomers. The photosensitive resin composition according to claim 1, wherein the composition is at least one (co) polymer selected from polymers. 6. The hydrophilic photopolymerizable monomer of the component (B) is a monomer having a polyalkylene glycol in the monomer structure and / or at least one functional group selected from a carboxyl group, a hydroxyl group and a phosphoric acid group. The photosensitive resin composition according to claim 1, which is a monomer having the same. 7. The photosensitive resin composition according to claim 1, wherein the component (A) has a form dispersed in the hydrophilic photopolymerizable monomer of the component (B). 8. A mixture of (A ′) an aqueous dispersion latex and (B) a hydrophilic photopolymerizable monomer to obtain a component (E), and thereafter, a component (E), a rubber (C) and a photopolymerization initiator (D). A method for producing a photosensitive resin composition, comprising kneading the compound. 9. The photosensitive resin according to claim 8, wherein after the water is removed from the component (E), the dried component (E), the component (C) and the component (D) are kneaded. A method for producing the composition. 10. A printing plate material comprising a support, on which a photosensitive layer comprising the photosensitive resin composition according to claim 1 is applied. 11. A printing plate material comprising a support, on which a photosensitive layer comprising the photosensitive resin composition obtained by the method according to claim 8 or 9 is applied.