WO2002044813A1 - Type amélioré de résine photosensible flexographique développable à l'eau - Google Patents
Type amélioré de résine photosensible flexographique développable à l'eau Download PDFInfo
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- WO2002044813A1 WO2002044813A1 PCT/JP2001/010336 JP0110336W WO0244813A1 WO 2002044813 A1 WO2002044813 A1 WO 2002044813A1 JP 0110336 W JP0110336 W JP 0110336W WO 0244813 A1 WO0244813 A1 WO 0244813A1
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- photosensitive resin
- resin composition
- hydrophilic copolymer
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
- G03F7/033—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
- Y10S430/1053—Imaging affecting physical property or radiation sensitive material, or producing nonplanar or printing surface - process, composition, or product: radiation sensitive composition or product or process of making binder containing
- Y10S430/1055—Radiation sensitive composition or product or process of making
- Y10S430/106—Binder containing
- Y10S430/111—Polymer of unsaturated acid or ester
Definitions
- the present invention relates to a photosensitive resin composition for a printing plate that can be subjected to aqueous development.
- Normal water-based developable photosensitive resin printing plates consist of a support layer for maintaining dimensional accuracy, a hydrophobic resin such as a hydrophilic copolymer and a thermoplastic elastomer, and a photopolymerizable unsaturated monomer.
- a transparent image carrier (negative film) is closely adhered thereon, and an actinic ray is irradiated through the negative film, An image is formed by selectively photo-curing a specific portion of the photosensitive resin composition layer, and then an unexposed portion of the composition layer is removed (developed) using an aqueous developer to provide a printing relief. Is formed.
- each component in the composition is finely and uniformly dispersed in order to obtain a required image faithfully.
- Preferably has a high developing speed.
- good developability with an aqueous developer is required, but after plate making, the printing durability when using water-based ink is high, and the ink attached to the plate after printing is removed using water or the like.
- the printing plate must be resistant to destruction when wiping (plate wiping resistance), and high water resistance and high plate wiping resistance are required.
- JP-A-7-114180 proposes a photosensitive resin composition using a hydrophilic copolymer containing a phosphate ester group as an essential component.
- the aqueous developer An object of the present invention is to provide a resin composition which can be developed, has photosensitivity, transparency, and processability, and has excellent transparency and low-temperature elasticity when cured.
- a phosphate group is used as an essential component of the hydrophilic group of the hydrophilic copolymer, water resistance, plate wiping resistance, or printing durability is not necessarily sufficient.
- methacrylic acid was used in place of the phosphate ester, but the amount used was too large, and the water resistance and printing durability were insufficient.
- U.S. Pat. No. 5,731,129 describes that an unsaturated monomer having a carboxyl group, a conjugated diene monomer as an essential component, and an aromatic vinyl compound and an alkyl (meth) acrylate are disclosed.
- a photosensitive resin composition using a hydrophilic copolymer as an optional component has been proposed.
- An object of the present invention is to suppress S-peng, decrease in strength and dimensional change due to z when developed with an aqueous developer.
- the monomers used in the polymerization of the hydrophilic copolymer include unsaturated monomers having a carboxyl group, conjugated monomers, aromatic vinyl compounds and alkyl (meth) acrylates. Since they are not used at the same time, the compatibility, aqueous developability, or printing durability of the resin composition is not necessarily sufficient.
- JP-A-63-84648 proposes a photosensitive resin composition using hydrophilic copolymer particles crosslinked with a polyfunctional vinyl compound.
- the present invention provides a composition in which the hydrophobic resin and the hydrophilic resin particles, which are the matrix components, are chemically and optically similar to each other, so that curing efficiency by light and reproducibility of a relief image are impaired. It is intended to deter.
- a conjugated gen is not used in a monomer used for polymerization of a hydrophilic copolymer, water resistance and printing durability are not always sufficient. Also, since many polyfunctional vinyl aldehyde compounds are used, sufficient printing durability cannot be obtained.
- Japanese Patent Publication No. 5-5106 proposes a photosensitive resin composition using a hydrophilic polymer compound having a carboxyl group.
- An object of the present invention is to suppress a decrease in resistance to water or an alcohol-based ink by using a composition using the hydrophilic polymer compound and a hydrophobic copolymer as a polymer component.
- the monomers used for the polymerization of the hydrophilic copolymer include unsaturated monomers having a carboxyl group, conjugated diene monomers, aromatic butyl compounds, and alkyl (meth) acrylates. Since not all acrylates are used at the same time, the compatibility, aqueous developability, or printing durability of the resin composition is not always sufficient.
- U.S. Pat. No. 5,348,884 discloses an aromatic vinyl compound and an unsaturated monomer having a propyloxyl group, a conjugated diene monomer, and a polyfunctional vinyl compound as essential components.
- a photosensitive resin composition using a hydrophilic copolymer containing alkyl (meth) acrylate as an optional component has been proposed.
- An object of the present invention is to suppress deterioration of printing life, printing durability, or reproducibility of a relief image. Since the unsaturated monomer having a carboxyl group, the conjugated diene monomer, the aromatic vinyl compound and the alkyl (meth) acrylate are not used at the same time, the compatibility of the resin composition is high.
- Japanese Patent Application Laid-Open Publication No. 2001-51012 proposes a photosensitive resin composition using a hydrophilic copolymer comprising an ethylenically unsaturated monomer containing a surfactant monomer. ing.
- a hydrophilic polymer is not required as a raw material, and a hydrophilic polymer can be produced even in a single polymerization step.
- the monomers used for the polymerization of the hydrophilic copolymer include all of unsaturated monomers having a carboxyl group, conjugated diene monomers, aromatic vinyl compounds and alkyl (meth) acrylates. Are not used at the same time, so water resistance and printing durability are not always sufficient.
- the conventional aqueous-developable photosensitive resin composition is a mixture of a hydrophilic component and a hydrophobic component as described above, there is a problem in compatibility (dispersion) of the resin component and resin composition. There were problems such as low aqueous developability of the product, low printing durability of the printing plate produced by exposure, low water resistance, and low wiping resistance of the printing plate.
- the technical problem of the present invention is to provide a photosensitive resin composition that can simultaneously satisfy the following six requirements in order to solve the above problems.
- the printing plate (especially when using water-based ink) has high printing durability (abrasion resistance).
- the present inventors have proposed that at least (1) an unsaturated monomer having a carboxyl group, (2) a conjugated diene monomer, (3) an aromatic vinyl compound and (4) an alkyl (meth) acrylate at a fixed ratio.
- the present inventors have found that the above-mentioned problems can be solved by using a hydrophilic polymer obtained at the same time, and completed the present invention.
- thermoplastic elastomer (B) thermoplastic elastomer
- hydrophilic copolymer (A) comprises at least 100 parts by mass of the unsaturated monomer used for the polymerization.
- the present invention relates to a photosensitive resin composition for flexographic printing, which is a polymer obtained by copolymerizing
- the second embodiment of the present invention provides the flexographic printing photosensitive composition according to the first embodiment, wherein the gel fraction of the hydrophilic copolymer (A) measured using toluene is 80 to 95%.
- the present invention relates to a sex resin composition.
- the third aspect of the present invention is the flexographic printing method according to the first or the second aspect of the present invention, wherein the hydrophilic copolymer (A) is synthesized by emulsion polymerization and the polymerization temperature is 60 ° C or more.
- the present invention relates to a photosensitive resin composition for use.
- the fourth aspect of the present invention relates to the photosensitive resin composition for flexographic printing according to the third aspect of the present invention, wherein the polymerization temperature is 70 ° C. or higher.
- the polymerization temperature is 70 ° C. or higher.
- at least 100 parts by mass of the hydrophilic copolymer (A) and the unsaturated monomer used in the polymerization are used.
- the present invention also relates to the photosensitive resin composition for flexographic printing according to any one of the first to fourth aspects of the present invention, which is obtained by copolymerizing a polyfunctional Bier compound and 0.5 parts by mass or less.
- the sixth aspect of the present invention is the photosensitive resin composition for flexographic printing according to the first aspect of the present invention, wherein the number average particle diameter of the hydrophilic copolymer (A) is in the range of 5 to 100 nm. About.
- the emulsifier used for the emulsion polymerization of the hydrophilic copolymer (A) contains less than 1 part by mass of the non-reactive emulsifier with respect to 100 parts by mass of the hydrophilic copolymer.
- the present invention relates to the photosensitive resin composition for flexographic printing according to any one of the first to sixth aspects of the present invention, wherein the reactive emulsifier is contained in an amount of 1 to 20 parts by mass.
- the eighth aspect of the present invention relates to the photosensitive resin composition for flexographic printing according to the seventh aspect of the present invention, wherein the reactive emulsifier contains a polyoxyalkylene structure.
- a ninth aspect of the present invention is a flexographic device having a laminated structure comprising a support and a layer of the photosensitive resin composition according to any one of the first to eighth aspects of the present invention formed on its surface.
- the present invention relates to a photosensitive composition for a printing plate.
- FIG. 1 is a diagram schematically showing a test performed for evaluating the wiping resistance of a printing plate.
- examples of (1) include a monobasic acid monomer having a carboxyl group and a dibasic acid monomer.
- monobasic acid monomers acrylic acid, methacrylic acid, crotonic acid, vinylbenzoic acid, cinnamic acid, and sodium, potassium and ammonium salts of these monobasic acid monomers, Etc. can be exemplified.
- dibasic acid monomer examples include itaconic acid, fumaric acid, maleic acid, citraconic acid, muconic acid, and sodium, potassium, and ammonium salts of these dibasic acid monomers.
- an unsaturated monomer having one or more carboxyl groups can be used.
- monobasic acid monomers are preferably atalylic acid / methacrylic acid, and dibasic acids are itaconic acid / fumaric acid.
- the unsaturated monomer (1) having a hydroxyl group is 2 to 15 parts by mass with respect to 100 parts by mass of the unsaturated monomer used for the polymerization of the hydrophilic copolymer (A). .
- the amount is less than 15 parts by mass, good water resistance and processability can be obtained, and when the amount is more than 2 parts by mass, sufficient aqueous developing property can be achieved.
- it is 2 to 10 parts by mass.
- the conjugated diene monomer (2) which is an essential component of the hydrophilic copolymer (A), includes 1,3-butadiene, isoprene, 2,3-dimethinole 1,3-butadiene, and 2-ethyl-1-ene. , 3-butadiene, 2-methyl-1,3-butadiene, 1,3-pentadiene, chloroprene, 2-chloro-1,3-butadiene, cyclopentadiene and the like.
- conjugated diene monomers can be used.
- butadiene is preferred in terms of availability.
- the conjugated diene (2) is used in an amount of 50 to 80 parts by mass based on 100 parts by mass of the unsaturated monomer used for the polymerization of the hydrophilic copolymer (A).
- amount is less than 80 parts by mass, good workability can be obtained.
- amount is more than 50 parts by mass, a decrease in water resistance and printing durability can be prevented.
- it is 60 to 80 parts by mass.
- the aromatic vinyl aldehyde compound (3) which is an essential component of the hydrophilic copolymer (A), is styrene.
- styrene ⁇ -methinolestyrene, ⁇ -methinolestyrene, m-methinolestyrene, p-methinolestyrene, ethynolestyrene, vinylinolexylene, bromostyrene, bininolebenzinolechloride, p-t-pentinolestyrene, chloro
- Examples include styrene and alkylstyrene.
- one or more aromatic biel compounds can be used.
- styrene is preferred from the viewpoint of easiness of polymerization.
- the aromatic vinyl compound (3) is used in an amount of 3 to 20 parts by mass with respect to 100 parts by mass of the unsaturated monomer used for the polymerization of the hydrophilic copolymer (A).
- amount is less than 20 parts by mass, sufficient image reproducibility and aqueous developability can be obtained.
- the amount is more than 3 parts by mass, the components of the photosensitive resin composition can be sufficiently uniformly dispersed in the mixture. it can. Preferably it is 5 to 20 parts by mass.
- Alkyl (meth) acrylate an essential component of the hydrophilic copolymer (A), is a general term for alkyl acrylate and alkyl methacrylate, and includes methyl (meth) acrylate, ethyl (meth) acrylate, and methyl (meth) acrylate.
- one or more alkyl (meth) acrylates can be used.
- ethyl acrylate, butyl acrylate, and 2-ethynolehexynoleate acrylate are preferred from the viewpoint of ease of synthesis.
- the amount of the alkyl (meth) acrylate (4) is 3 to 30 parts by mass based on 100 parts by mass of the unsaturated monomer used for the polymerization of the hydrophilic copolymer (A). 30 parts by mass When the amount is lower, good water resistance can be obtained, and when the amount is more than 3 parts by mass, sufficient aqueous developability can be achieved. Preferably, it is 5 to 25 parts by mass.
- unsaturated monomers that can be used in addition to the above components (1) to (4) include polyfunctional vinyl compounds and ethylene-based monocarboxylic acid alkyl esters having a hydroxyl group.
- the polyfunctional vinyl conjugate which can be used as necessary in the present invention is a monomer having two or more vinyl bonds in one molecule (however, excluding conjugated diene monomers).
- Group polyfunctional bur compounds and polyfunctional (meth) alkyl acrylates are examples of polyfunctional (meth) alkyl acrylates.
- aromatic polyfunctional compound examples include dibutylbenzene and tributylbenzene.
- polyfunctional (meth) acrylates include ethylene glycol di (meth) acrylate, ethylene glycol di (meth) acrylate, 1,3-butylene glycol di (meth) acrylate, and 1,4-butylene glycol resin.
- the amount of the polyfunctional vinyl conjugate is preferably smaller in terms of printing durability and plate wiping resistance, and is preferably 0.5 parts by mass with respect to 100 parts by mass of the monomer used in the hydrophilic copolymer (A). Departments are preferred.
- Examples of the ethylene-based monocarboxylic acid alkyl ester monomer having a hydroxyl group include 2-hydroxyl acetylate, 2-hydroxyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, and the like.
- Examples of the unsaturated dibasic acid alkyl ester include crotonic acid alkyl ester, itaconic acid alkyl ester, fumaric acid alkyl ester, and maleic acid alkyl ester.
- vinylinole cyanide compound examples include acrylonitrile and methacrylonitrile.
- (Meth) acrylamide and its derivatives include (meth) acrylamide,
- Examples thereof include N-methylonole (meth) acrylamide, N-aroxy (meth) acrylamide, and the like.
- vinyl esters examples include vinyl acetate, vinyl butyrate, vinyl stearate, vinyl laurate, vinyl myristate, vinyl propionate, vinyl versatate, and the like.
- vinyl ethers include methyl vinyl ether, ethyl vinyl ether, Examples thereof include propyl vinyl ether, butyl vinyl ether, amyl vinyl ether, and hexyl vinyl ether.
- vinyl halides examples include vinyl chloride, bibromide, bifluoride, vinylidene salt, vinylidene fluoride and the like.
- Examples of the basic monomer having an amino group include aminoethyl (meth) atalylate, dimethylaminoethyl (meth) atalylate, and 'getylaminoethyl (meth) atalylate.
- olefins examples include ethylene and the like.
- silicon-containing ⁇ , ⁇ -ethylenically unsaturated monomer examples include vinyltrichlorosilane and vinyltriethoxysilane.
- the method for polymerizing the hydrophilic copolymer ( ⁇ ) used in the present invention is not particularly limited, but emulsion polymerization is preferred.
- emulsion polymerization a predetermined amount of water, an emulsifier, and other additives are charged in advance to a reaction system adjusted to a temperature at which polymerization can be performed, and then a polymerization initiator and a monomer, an emulsifier, a regulator, and the like are batch-distributed. It is polymerized by adding it into the reaction system by operation or continuous operation.
- the layer structure of the hydrophilic copolymer particles to be polymerized can be changed stepwise by a method of adding an unsaturated monomer, an emulsifier, other additives, and a modifier to the reaction system later.
- Physical properties representative of the structure of each layer include hydrophilicity, glass transition point, molecular weight, crosslink density, and the like.
- the number of stages of this layer structure is not particularly limited.
- the emulsifier (surfactant) used in the emulsion polymerization is preferably a reactive emulsifier in terms of water resistance and printing durability.
- the reactive emulsifier that can be used in the present invention includes a radically polymerizable double bond, a hydrophilic functional group, and a hydrophobic group in the molecular structure, and emulsifies and disperses in the same manner as a general emulsifier.
- And wetting function when emulsifying and polymerizing a hydrophilic copolymer, at least 0.1 part by mass alone with respect to 100 parts by mass of an unsaturated monomer excluding a reactive emulsifier.
- Milk that can synthesize a polymer with a particle size of 5 to 500 nm by using It is a dashi (surfactant) agent.
- Examples of the structure of the radical polymerizable double bond in the molecular structure include a vinyl group, an acryloyl group, and a metharyloyl group.
- Examples of the hydrophilic functional group in the molecular structure include anionic groups such as a sulfate group, a nitric acid group, a phosphoric acid group, a boric acid group, and a sulfoxy group, or a cationic group such as an amino group, or polyethylene, polyoxymethylene.
- a polyoxyalkylene chain structure such as polyoxypropylene and a hydroxyl group.
- Examples of the hydrophobic group in the molecular structure include an anoalkyl group and a phenyl group.
- the reactive emulsifier includes an anionic emulsifier, a nonionic emulsifier, a cationic emulsifier, an amphoteric emulsifier and the like, depending on the type of the structure of the hydrophilic functional group contained in the structure.
- they can have a radical polymerizable double bond, a hydrophilic functional group and a hydrophobic group in the molecular structure having a plurality of types of structures and functional groups.
- reactive emulsifier reactive surfactant
- H 2 C CHCH20CH 2 -CHCH 2 0— C— CH— S0 3 NH 4 (iv)
- H 2 C COOCH 2 -C-CH 2 — S0 3 Na
- the reactive emulsifier in the present invention examples include Adecaria Soap SE (Asahi Denka Kogyo, trade name), Aqualon HS, BC and KH (Daiichi Kogyo Seiyaku, trade name), Latemul S (Kao, trade name), Antotutus MS (Japan emulsifier, trade name), Adecaria Soap SDX, PP (Asahi Denka Kogyo, trade name), Hytenol A (Daiichi Kogyo Pharmaceutical, trade name), Eleminor RS (Sanyo Kasei Kogyo, trade name), Spinomer (Toyo Soda Kogyo, trade name), etc.
- nonionic surfactant examples include, but are not limited to, AQUALON RN PENIGENE N (Daiichi Kogyo Seiyaku, trade name) and Adecaria Soap NE (Asahi Denka Kogyo, trade name). These may be used alone or in combination of two or more.
- the amount of the reactive emulsifier used in the emulsion polymerization is such that, out of 100 parts by mass of the unsaturated monomer used for the polymerization of the hydrophilic copolymer (A), good image reproduction is achieved.
- the amount is preferably 1 part by mass or more and 20 parts by mass or less from the viewpoint of water resistance and printing durability.
- a non-reactive emulsifier may be used.
- Non-reactive emulsifiers include fatty acid soaps, rosin acid soaps, sulfonates, sulfates, esternol phosphates, polyphosphates, anionic surfactants such as salicozinate, etc., nitrilated oil derivatives, oils and fats Derivatives, fatty acid derivatives, cationic surfactants such as polyolefin derivatives, alcohol ethoxylates, alkylphenol ethoxylates, propoxylates, aliphatic alkanolamides, alkyl polyglycosides, polyoxyethylene sorbitan fatty acid esters, oxy Nonionic surfactants such as ethyleneoxypropylene block copolymers are exemplified.
- sulfonates examples include alkyl sulfonates, alkyl sulfates, alkyl sulfosuccinates, polyoxyethylene alkyl sulfates, sulfonated fats and oils, alkyl diphenyl ether disulfonates, hyole sulfonates, and alkylsulfonates.
- the amount of the non-reactive emulsifier used in the emulsion polymerization is preferably small in terms of water resistance and hygroscopicity, and is preferably 1 part by mass or less based on 100 parts by mass of the hydrophilic copolymer (A). Good.
- a reactive emulsifier and a non-reactive emulsifier may be used in combination.
- a known chain transfer agent can be used.
- a chain transfer agent containing sulfur element Alkanethiols such as silmercaptan, n-dodecinolemercaptan, etc., thioalkyl alcohols such as mercaptoethanol and mercaptopropanol, thioalkylcarboxylic acids such as thioglycolic acid and thiopropionic acid, octynoleate thioglycolic acid, and thione.
- Examples include thiocarboxylic acid anoalkyl esters such as octyl propionate, and sulfides such as dimethyl sulfide and getyl sulfide.
- Other examples of chain transfer agents include terpinolene, dipentene, t-terbinene, and halogenated hydrocarbons such as carbon tetrachloride. Of these, alkanethiol is preferred because it has a high chain transfer rate and has a good balance of properties of the resulting polymer.
- These chain transfer agents may be used alone or as a mixture of two or more. These chain transfer agents may be mixed with the monomer and supplied to the reaction system, or may be added alone in a predetermined amount at a predetermined time.
- the amount of the chain transfer agent used is 0.1 parts by mass or more in terms of processability, out of 100 parts by mass of the unsaturated monomer used for the polymerization of the hydrophilic copolymer (A).
- the amount is preferably 10 parts by mass or less from the viewpoint of suppressing a significant decrease in the molecular weight.
- a polymerization reaction inhibitor can be used if necessary.
- the polymerization reaction inhibitor is a compound that reduces the rate of radical polymerization by being added to a milk polymerization system. More specifically, it is a polymerization rate retarder, a polymerization inhibitor, a chain transfer agent having low radical restart reactivity, and a monomer having low radical restart reactivity.
- the polymerization reaction inhibitor is used for adjusting the polymerization reaction rate and adjusting the physical properties of the latex. These polymerization reaction inhibitors are added to the reaction system in batch operation or continuous operation. When a polymerization reaction inhibitor is used, the strength of the latex film tends to increase.
- polymerization reaction inhibitor is closely related to the three-dimensional structure of the polymer, and this is presumed to be effective in adjusting the physical properties of the latex film.
- polymerization reaction inhibitors include quinones such as o-, m-, or p-benzoquinone, nitrobenzene, o-, m- , some compounds, nitro compounds such as p-dinitrobenzene, and diphene.
- Amines such as luminamine, catechol derivatives such as tertiary butyl catechol, 1,1-diphenylethylene or 1,1-diene such as -methylstyrene, 2,4-diphenyl-4-methyl-11-pentene Substituted vinyl compounds, 1,4-disubstituted vinyl compounds such as 2,4-diphenyl 4-methyl-2-pentene and hexahexene.
- catechol derivatives such as tertiary butyl catechol
- 1,1-diphenylethylene or 1,1-diene such as -methylstyrene
- 2,4-diphenyl-4-methyl-11-pentene 1,4-disubstituted vinyl compounds
- 1,4-disubstituted vinyl compounds such as 2,4-diphenyl 4-methyl-2-pentene and hexahexene.
- the amount of these polymerization reaction inhibitors used is 10 parts by mass in terms of suppressing a significant decrease in the polymerization rate with respect to 100 parts by mass of the unsaturated monomer used for the polymerization of the hydrophilic copolymer (A). Parts or less are preferred.
- the radical polymerization initiator used for emulsion polymerization is one that initiates addition polymerization of monomers by radical decomposition in the presence of heat or a reducing substance, and is either an inorganic initiator or an organic initiator.
- Such compounds include, for example, water-soluble or oil-soluble peroxodisulfates, peroxides, azobis compounds, and the like, specifically, potassium peroxodisulfate, sodium peroxodisulfate, ammonium peroxodisulfate, hydrogen peroxide, and the like. , T-butyl hydroperoxide, benzoyl peroxide, 2,2-azobisbutyronitrile, cumenehydride peroxide, etc., and "POLYMER HANDBOOK 3 rdedition (J.
- the amount of the polymerization initiator to be used is preferably 0.2 parts by mass or more from the viewpoint of stability during the polymerization with respect to 100 parts by mass of the unsaturated monomer used for the polymerization of the hydrophilic copolymer (A).
- the amount is preferably 3 parts by mass or less from the viewpoint of the moisture absorption resistance of the resin composition.
- various polymerization regulators can be added as needed.
- a pH adjuster such as sodium hydroxide, potassium hydroxide, ammonium hydroxide, sodium hydrogen carbonate, sodium carbonate, disodium hydrogen phosphate and the like can be added.
- chelating agents such as sodium ethylenediaminetetraacetate can also be added as a polymerization regulator.
- Other additives include thickeners such as Alkyri functional latex, hexametaphosphoric acid, water-soluble polymers such as polyvinyl alcohol and carboxymethyl cellulose, thickeners, various antioxidants, ultraviolet absorbers, Preservatives, disinfectants, defoamers, dispersants such as sodium polyacrylate, water-resistant agents, metal oxides such as zinc white, cross-linking agents such as isocyanate-based compounds, epoxy compounds, lubricants, water retention agents, etc.
- Various additives may be added. The method of adding these additives is not particularly limited, and they can be added at the time of polymerization of the hydrophilic copolymer, regardless of after the polymerization.
- the polymerization temperature of the emulsion polymerization is preferably 60 ° C or higher from the viewpoints of water-based developability, printing durability and plate wiping resistance, and is preferably 120 ° C or lower from the viewpoint of avoiding production difficulty due to pressure increase during polymerization. preferable.
- the range of 70 ° C to 120 ° C is more preferable.
- the number average particle diameter of the obtained hydrophilic copolymer (A) is preferably in the range of 5 to 500 nm.
- the thickness is preferably 500 nm or less from the viewpoint of aqueous developing property and image reproducibility, and 5 nm or more from the viewpoint of printing durability.
- the range of 5-1 to 0 nm is more preferable.
- the toluene gel fraction of the obtained hydrophilic copolymer (A) is preferably in the range of 60 to 99%.
- the strength is preferably 80% or more in terms of printing plate strength / printing durability, and 95% or less in terms of the compatibility (compatibility) of the photosensitive resin, processability, and aqueous developability.
- Toluene gel fraction means that a suitable amount of a dispersion of hydrophilic copolymer (A) having a concentration of about 30 wt% after emulsion polymerization is dropped on a Teflon sheet and dried at 30 ° C for 30 minutes.
- 0.5 g of (A) was immersed in 3 Om 1 of toluene at 25 ° C, shaken for 3 hours using a shaker, filtered through a 320 SUS mesh, and the non-passage was reduced to 130 °. It is obtained from the weight fraction (%) obtained by dividing the weight after drying for 1 hour by 0.5 (g).
- thermoplastic elastomer (B) used in the present invention is an elastomer which exhibits rubber elasticity at around normal temperature, hardly undergoes plastic deformation, and is plasticized by heat when mixing the composition with an extruder or the like.
- examples include thermoplastic block copolymers, 1,2-polybutadiene, and polyurethane-based elastomers.
- thermoplastic block copolymer is preferable, and among them, a thermoplastic resin obtained by polymerizing a monobutyl-substituted aromatic hydrocarbon monomer and a conjugated gen monomer is more preferable.
- Styrene, ⁇ -methylstyrene, ⁇ -methylstyrene, ⁇ -methoxystyrene, etc. are used as monovinyl-substituted aromatic hydrocarbon monomers, and butadiene, isoprene, etc. are used as synergistic gen monomers.
- Examples thereof include a styrene-butadiene-styrene block copolymer and a styrene-isoprene-styrene block copolymer.
- the content of the monovinyl-substituted aromatic hydrocarbon in the thermoplastic '1' raw elastomer was 8 wt% in terms of suppressing cold flow resistance when the photosensitive resin plate before lamination was laminated.
- the above is preferable, and the content is preferably 50 wt% or less from the viewpoint of suppressing a decrease in print quality caused by an excessively high hardness of the printing plate.
- the average ratio of bullet bonds in the conjugated gen segment of the thermoplastic elastomer is preferably 5% or more from the viewpoint of image reproducibility of the printing plate, and is 40% or less from the viewpoint of suppressing the tackiness of the printing plate surface. Is preferred. A range from 10 to 35% is more preferred.
- the average content of the monobutyl-substituted aromatic hydrocarbon and the conjugated gen, and the average ratio of the bullet bonding units in the thermoplastic elastomer can be determined by IR spectrum or NMR.
- the amount of the thermoplastic elastomer (B) used in the total amount of the photosensitive resin composition for flexographic printing depends on the high physical properties of the printing plate (elongation (elongation)), water resistance or ink swelling resistance. It is preferably 1% by weight or more, more preferably 40% by weight or less from the viewpoint of aqueous developability.
- the photopolymerizable unsaturated monomer (C) used in the present invention includes esters such as acrylic acid, methacrylic acid, fumaric acid and maleic acid, derivatives of acrylamide and methacrylamide, aryl esters, Styrene and its derivatives, N-substituted maleimide I can give a compound.
- diacrylates and dimethacrylates of phenolic diols such as hexanediol and nonanediol, or ethylene glycol, diethylene glycolone, propylene glycolone, dipropylene glycolone, polyethylene glycolone, and butylene glycol.
- Styrene vinyl toluene, divinyl benzene, diacryl phthalate, triaryl resinyl acrylate, getyl esteno fumanoleate, dibutyl esteno fumanoleate , Dioctyl estenolate fumanolate, distearyl enoesteno fumaroleate, butyl octeno oleesteno fumarate, dipheninole estenole fumaoleate, dibenzino oleestenole fumanolate, dibutyl ester maleate, dioctyl maleate, dioctyl maleate Esters, bis (3-phenylpropynole) fumarate, diperinole fumarate, dibehenolenoester fumarate, N-lauryl maleimide and the like can be mentioned. These may be used alone or in combination of two or more.
- the amount of the photopolymerizable unsaturated monomer (C) used is preferably 11% or more of the total amount of the photosensitive resin composition for flexographic printing, from the viewpoint of fine points and character formability. From the viewpoint of preventing cold flow resistance when the photosensitive resin plate is laminated or preventing the printing plate from becoming too hard, deterioration in print quality is preferably 30 wt% or less.
- Examples of the photopolymerization initiator (D) used in the present invention include: benzofuunone, 4,4-bis (getylamino) benzophenone, t-butylantraquinone, 2-ethylanthraquinone, 2,4-ethylethylthioxanthone Thioxanthones such as isopropyl thioxanthone, 2,4-dichloromouth thioxanthone; ethoxyacetophenone; 2-hydroxy-1--2-methyl-1-phenyl-2-propane 1-1; pendinoledimethylketanol; 1-hydroxycyclocyclo Hexyl-pheninoleketone, 2-methyl-2-morpholino (4-thiomethylphenyl) propane, 1-one, 2-benzinole-1, 2-dimethylamine 11- (4-monorefolinophenol) Acetophenones such as tanone; benzoin methyl ether, benzoin ethyl ether,
- the amount of the photopolymerization initiator (D) is preferably 0.1 to 10 wt% based on the total amount of the photosensitive resin composition.
- the content is preferably 0.1 wt% or more in terms of fine points and character formation, and 10 wt% or less in terms of a decrease in exposure sensitivity due to a decrease in the transmittance of active light such as ultraviolet rays.
- the photosensitive resin composition of the present invention may further contain various auxiliary components as required, such as a plasticizer, a thermal polymerization inhibitor, an ultraviolet absorber, an anti-halation agent, and a light stabilizer. Etc. can be added.
- the plasticizer is a liquid that is fluid at normal temperature and is a hydrocarbon oil such as naphthenic oil or paraffin oil, liquid polybutadiene, liquid polyisoprene, a modified liquid polybutadiene, or liquid acrylic nitrile-butadiene copolymer.
- a hydrocarbon oil such as naphthenic oil or paraffin oil
- liquid polybutadiene liquid polyisoprene
- a modified liquid polybutadiene or liquid acrylic nitrile-butadiene copolymer.
- These compositions may be provided with a photopolymerizable reactive group.
- a support such as polyester may be provided on the side opposite to the relief in order to maintain the accuracy as a printing plate. Since the photosensitive resin composition of the present invention produces tackiness depending on its composition, the photosensitive resin composition has good contact with a transparent substrate (negative film) superimposed thereon and reuse of the image carrier. In order to make this possible, a flexible film layer developable with an aqueous developer may be provided on the surface.
- the photosensitive resin composition of the present invention can be produced by mixing the above components (A) to (D) using an extruder or a kneader. After mixing the resin composition, A layer having a desired thickness can be formed by hot press molding, force rendering, or extrusion molding.
- the support and the flexible film layer can be adhered to the photosensitive layer by roll lamination after sheet molding. It is also possible to obtain an accurate photosensitive layer by hot pressing after lamination.
- the actinic light source used for photocuring the photosensitive resin composition of the present invention includes a low-pressure mercury lamp, a high-pressure mercury lamp, an ultraviolet fluorescent lamp, a carbon arc lamp, a xenon lamp, a zirconium lamp, and sunlight.
- the photosensitive resin composition of the present invention is irradiated with light through a transparent image carrier to form an image, an unirradiated portion is removed (developed) using an aqueous developer to obtain a relief.
- the aqueous developer referred to in the present invention is obtained by mixing a nonionic or anionic surfactant with water, a pH adjuster, and a washing accelerator, if necessary.
- the nonionic surfactant include polyoxyalkylene alkyl or alkenyl ether, polyoxyalkylene alkyl or alkenyl phenyl ether, polyoxyalkylene alkyl or alkenyl amine, and polyoxyalkylene alkyl. Or alkenyl amide, ethylene oxide z propylene oxide block, or the like.
- anionic surfactant examples include a linear alkylbenzene sulfonate having an alkyl having an average carbon number of 8 to 16 and an ⁇ -olefin sulfonic acid salt having an average carbon number of 10 to 20.
- Examples of the ⁇ regulator include borates, carbonates, silicates, metasilicates, succinates, and acetates.
- Sodium silicate is preferred because it is easily soluble in water.
- there is a cleaning aid but the cleaning ability is enhanced by using the surfactant and the ⁇ adjuster in combination.
- Specific examples include monoethanol Amines such as amines, diethanolamine and triethanolamine; ammonium salts such as tetramethylammonium hydroxide; glycol ethereals; and paraffin hydrocarbons.
- an antifoaming agent a dispersing agent, a corrosion inhibitor, and a decay inhibitor may be used in combination.
- the plate is generally dried in an oven at about 60 ° C for 15 to 120 minutes.
- stickiness may remain on the plate surface even after drying is completed. In that case, stickiness can be removed by a known surface treatment method.
- a surface treatment method exposure treatment with an actinic ray having a wavelength of 300 nm or less is desirable.
- Production Example 1 was repeated except that 3 parts by mass of the total amount of reactive emulsifiers and 0.5 part by mass of non-reactive emulsifier were initially charged and 1 part by mass of the remaining reactive emulsifier was added as an aqueous solution. According to the above, a hydrophilic copolymer (A) was obtained.
- PET polyester film
- PVA polyvinyl alcohol
- the shapes of the 500 m concave and convex fine lines of the relief image were evaluated using a microscope.
- the groove of the concave and thin line is deep and the convex and thin line is sharp and not thick, it is marked as “ ⁇ ”.
- the groove of the concave and thin line is shallow or the line of the convex fine line is not sharp and thick, it is marked as “X”.
- plate wiping resistance refers to the degree of difficulty in damaging a printing plate image portion in an operation of wiping water-based ink.
- the strength of the plate wiping resistance was measured in a simulated manner as shown in FIG.
- a printing plate 1 (top view) with characters between 8 and 12 points in size is made using negative film 2 and placed in a 10% aqueous solution of isopropyl alcohol instead of aqueous ink for 16 hours.
- After immersion, rubbed left and right 300 times using an NP-type printing durability tester (Shinmura Printing Co., Ltd., contacted object 3: 8 cm x 6 cm cloth, load 1 kg) was observed under a microscope.
- NP-type printing durability tester Shinmura Printing Co., Ltd., contacted object 3: 8 cm x 6 cm cloth, load 1 kg
- Tables 1 and 2 show the physical property evaluation test results obtained by the above method. As a comprehensive evaluation, all the evaluations (a) to (f) are evaluated as “ ⁇ ”. Hereinafter, these results will be described as Examples and Comparative Examples.
- Table 1 shows a list of evaluation test results of the resin compositions and printing plates obtained in Examples 1 to 5 and Comparative Examples 1 and 2.
- Table 2 shows a list of the evaluation test results of the resin compositions and the printing plates obtained in Examples 16 and 7, and Comparative Examples 3 and 4.
- Table 2 shows that if the amount of styrene is too small, the compatibility decreases, and if it is too large, the development time becomes longer and the image reproducibility decreases.
- Emulsifier represents emulsifier ( ⁇ ) in Chapter g on page 11 of this specification
- emulsifier (i) * 1) 4 4 4 4 4 4 4 4 t-dodecyl mercaptan 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 Emulsion polymerization temperature (° C) 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 Copolymer ( Number average particle diameter of (A) (nm) 57 51 60 55 50 61 58 52 Toluene gel fraction (%) 88 90 87 88 88 86 89 89 Evaluation
- Emulsifier (i) represents emulsifier (i) described on page 11 of this specification.
- Table 4 shows a list of evaluation test results of the resin compositions and printing plates obtained in Examples 12 to 18.
- Table 5 shows a list of the evaluation test results of the resin compositions and printing plates obtained in Examples 19 to 24.
- Example 19 Example 20 Example 21 Example 22 Example 23 Example 24
- the compatibility (dispersion) of the hydrophilic and hydrophobic compositions of the photosensitive resin composition is improved, and the development time in an aqueous developer is reduced.
- High water-repellent ink resistance, excellent image reproducibility, high printing durability even when water-based ink adheres, and high wiping resistance when removing ink adhering to the printing plate High printing plates can be obtained.
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Materials For Photolithography (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002430101A CA2430101C (en) | 2000-11-28 | 2001-11-27 | Improved photosensitive resin for flexographic printing developable with an aqueous developer solution |
AU2002224117A AU2002224117B2 (en) | 2000-11-28 | 2001-11-27 | Improved water-developable photosensitive resin for flexography |
AU2411702A AU2411702A (en) | 2000-11-28 | 2001-11-27 | Improved water-developable photosensitive resin for flexography |
JP2002546916A JP3836433B2 (ja) | 2000-11-28 | 2001-11-27 | 改良された水系現像可能なフレキソ印刷用感光性樹脂 |
EP01998173.7A EP1343049B1 (en) | 2000-11-28 | 2001-11-27 | Improved water-developable photosensitive resin for flexography |
US10/432,930 US6989226B2 (en) | 2000-11-28 | 2001-11-27 | Water-developable photosensitive resin for flexography |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000361371 | 2000-11-28 | ||
JP2000-361371 | 2000-11-28 | ||
JP2001-111193 | 2001-04-10 | ||
JP2001111193 | 2001-04-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002044813A1 true WO2002044813A1 (fr) | 2002-06-06 |
Family
ID=26604727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/010336 WO2002044813A1 (fr) | 2000-11-28 | 2001-11-27 | Type amélioré de résine photosensible flexographique développable à l'eau |
Country Status (6)
Country | Link |
---|---|
US (1) | US6989226B2 (ja) |
EP (1) | EP1343049B1 (ja) |
JP (1) | JP3836433B2 (ja) |
AU (2) | AU2411702A (ja) |
CA (1) | CA2430101C (ja) |
WO (1) | WO2002044813A1 (ja) |
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EP1596253A1 (en) * | 2003-02-19 | 2005-11-16 | Asahi Kasei Chemicals Corporation | Process for producing water development printing plate for relief printing |
JP2006163284A (ja) * | 2004-12-10 | 2006-06-22 | Asahi Kasei Chemicals Corp | 感光性樹脂構成体 |
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JP2014065251A (ja) * | 2012-09-27 | 2014-04-17 | Tokai Rubber Ind Ltd | フレキソ印刷版およびフレキソ印刷版の表面処理方法 |
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- 2001-11-27 US US10/432,930 patent/US6989226B2/en not_active Expired - Lifetime
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- 2001-11-27 WO PCT/JP2001/010336 patent/WO2002044813A1/ja active IP Right Grant
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Cited By (14)
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JP4627871B2 (ja) * | 2000-11-28 | 2011-02-09 | 旭化成イーマテリアルズ株式会社 | 水系現像可能なフレキソ印刷用感光性樹脂 |
JP2002162731A (ja) * | 2000-11-28 | 2002-06-07 | Asahi Kasei Corp | 水系現像可能なフレキソ印刷用感光性樹脂 |
EP1596253A1 (en) * | 2003-02-19 | 2005-11-16 | Asahi Kasei Chemicals Corporation | Process for producing water development printing plate for relief printing |
EP1596253A4 (en) * | 2003-02-19 | 2010-02-03 | Asahi Kasei Chemicals Corp | PROCESS FOR PRODUCING A WATER-DEVELOPING PRINTING PLATE FOR HIGH PRINTING |
JP2006163284A (ja) * | 2004-12-10 | 2006-06-22 | Asahi Kasei Chemicals Corp | 感光性樹脂構成体 |
JP4606147B2 (ja) * | 2004-12-10 | 2011-01-05 | 旭化成イーマテリアルズ株式会社 | 感光性樹脂構成体 |
KR100932839B1 (ko) | 2006-12-22 | 2009-12-21 | 다이요 잉키 세이조 가부시키가이샤 | 감광성 수지 조성물 및 그것을 이용하여 얻어지는 소성물패턴의 제조 방법 |
WO2011081084A1 (ja) * | 2009-12-29 | 2011-07-07 | 東洋紡績株式会社 | フレキソ印刷版の製造方法およびフレキソ印刷版 |
US20120251834A1 (en) * | 2009-12-29 | 2012-10-04 | Toyo Boseki Kabushiki Kaisha | Method for manufacturing flexographic printing plate and flexographic printing plate |
JP5751492B2 (ja) * | 2009-12-29 | 2015-07-22 | 東洋紡株式会社 | フレキソ印刷版の製造方法およびフレキソ印刷版 |
US9937524B2 (en) | 2009-12-29 | 2018-04-10 | Toyo Boseki Kabushiki Kaisha | Method for manufacturing flexographic printing plate and flexographic printing plate |
JP2014065251A (ja) * | 2012-09-27 | 2014-04-17 | Tokai Rubber Ind Ltd | フレキソ印刷版およびフレキソ印刷版の表面処理方法 |
TWI740023B (zh) * | 2017-04-04 | 2021-09-21 | 日商旭化成股份有限公司 | 柔版印刷版用感光性樹脂組合物、柔版印刷原版、柔版印刷版及共聚物 |
US11493844B2 (en) | 2017-04-04 | 2022-11-08 | Asahi Kasei Kabushiki Kaisha | Photosensitive resin composition for flexographic printing plate, flexographic printing original plate, flexographic printing plate, and copolymer |
Also Published As
Publication number | Publication date |
---|---|
US20040067442A1 (en) | 2004-04-08 |
CA2430101C (en) | 2009-05-26 |
CA2430101A1 (en) | 2002-06-06 |
EP1343049B1 (en) | 2014-11-19 |
US6989226B2 (en) | 2006-01-24 |
EP1343049A4 (en) | 2006-08-02 |
JPWO2002044813A1 (ja) | 2004-04-02 |
EP1343049A1 (en) | 2003-09-10 |
AU2411702A (en) | 2002-06-11 |
AU2002224117B2 (en) | 2005-01-27 |
JP3836433B2 (ja) | 2006-10-25 |
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