CN116083008A - Acrylate pressure-sensitive adhesive for printing plate, double-sided adhesive tape, and preparation method and application thereof - Google Patents
Acrylate pressure-sensitive adhesive for printing plate, double-sided adhesive tape, and preparation method and application thereof Download PDFInfo
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- CN116083008A CN116083008A CN202211573220.4A CN202211573220A CN116083008A CN 116083008 A CN116083008 A CN 116083008A CN 202211573220 A CN202211573220 A CN 202211573220A CN 116083008 A CN116083008 A CN 116083008A
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- acrylate
- sensitive adhesive
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- 239000002390 adhesive tape Substances 0.000 title claims abstract description 100
- 239000004820 Pressure-sensitive adhesive Substances 0.000 title claims abstract description 78
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 title claims description 53
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000000178 monomer Substances 0.000 claims abstract description 94
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 61
- -1 acrylic ester Chemical class 0.000 claims abstract description 38
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims description 89
- 239000002904 solvent Substances 0.000 claims description 65
- 239000010410 layer Substances 0.000 claims description 62
- 239000003999 initiator Substances 0.000 claims description 60
- 239000003795 chemical substances by application Substances 0.000 claims description 33
- 238000002156 mixing Methods 0.000 claims description 30
- 229920005989 resin Polymers 0.000 claims description 30
- 239000011347 resin Substances 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 28
- 239000000758 substrate Substances 0.000 claims description 27
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 19
- 238000002955 isolation Methods 0.000 claims description 18
- 239000002131 composite material Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 14
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 claims description 13
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 13
- 239000012948 isocyanate Substances 0.000 claims description 13
- 150000002513 isocyanates Chemical class 0.000 claims description 13
- 230000001070 adhesive effect Effects 0.000 claims description 11
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 10
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 10
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 10
- 239000000853 adhesive Substances 0.000 claims description 8
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000007865 diluting Methods 0.000 claims description 6
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 5
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims description 3
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 3
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 3
- 125000005250 alkyl acrylate group Chemical group 0.000 claims description 3
- 229920003180 amino resin Polymers 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 claims description 3
- 150000003505 terpenes Chemical class 0.000 claims description 3
- 235000007586 terpenes Nutrition 0.000 claims description 3
- 229920006222 acrylic ester polymer Polymers 0.000 abstract description 4
- 239000003292 glue Substances 0.000 description 39
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 30
- 239000004342 Benzoyl peroxide Substances 0.000 description 26
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 26
- 235000019400 benzoyl peroxide Nutrition 0.000 description 26
- 239000000243 solution Substances 0.000 description 23
- 238000004321 preservation Methods 0.000 description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 12
- 230000001804 emulsifying effect Effects 0.000 description 8
- 239000011259 mixed solution Substances 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 239000012895 dilution Substances 0.000 description 6
- 238000010790 dilution Methods 0.000 description 6
- 238000010008 shearing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 125000005396 acrylic acid ester group Chemical group 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005580 one pot reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/062—Copolymers with monomers not covered by C09J133/06
- C09J133/064—Copolymers with monomers not covered by C09J133/06 containing anhydride, COOH or COOM groups, with M being metal or onium-cation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1808—C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
Abstract
The invention discloses an acrylic ester pressure-sensitive adhesive for printing plates, a double-sided adhesive tape, a preparation method and application thereof, wherein 35-50 parts of acrylic ester soft monomers, 5-20 parts of acrylic ester hard monomers and 0-5 parts of acrylic acid functional monomers are selected, and the types and proportions of the acrylic ester monomers are selected to ensure that the synthesized acrylic ester polymer has the characteristics of large molecular weight and large cohesive strength.
Description
Technical Field
The invention relates to the technical field of pressure-sensitive adhesives for printing plate adhesion and fixation, in particular to an acrylic pressure-sensitive adhesive for printing plate adhesion and fixation, a double-sided adhesive tape, a preparation method and application thereof.
Background
Printing plates are carriers for transferring ink to a printed image on a substrate, the carrier surface being treated to transfer a portion of the printing ink and not to transfer another portion of the printing ink.
A special double-sided adhesive tape is needed in the printing process of the printing plate, and the special double-sided adhesive tape has the main effects of adhering various printing plates on a printing plate roller, fixing the positions of the printing plates, ensuring that the printing plates are not shifted and fall off in the printing process and being capable of being repeatedly used. The basic requirements of printing plates on double-sided adhesive tapes for plate adhesion: 1) The adhesive tape has moderate viscosity and good stability. When high-speed printing is used for producing mass products, the low viscosity of the double-sided adhesive tape can cause the phenomena of position movement of a printing plate or edge tilting of the printing plate, even falling of the printing plate, so that the printing position movement or inaccurate overprinting can be caused, and even printing can not be performed; the double-sided adhesive tape has strong viscosity, increases along with the increase of printing times, is difficult to detach from the printing plate after being used, and easily causes the tearing of the printing plate and the residual adhesive during the detachment; the double-sided adhesive tape is therefore moderately tacky and remains stable, so that the print quality is ensured and the adhesive tape is easily removed from the printing plate after printing is completed. 2) The adhesive tape has high hardness and good elasticity. The adhesive tape has high hardness, so that the thickness of the adhesive tape is not easy to deform under the action of printing pressure, and the printing pressure in the printing process is kept unchanged. The adhesive tape has good elasticity, so that after the adhesive tape is slightly deformed in the printing process, the original shape can be quickly restored when the printing pressure is removed, the thickness of a printing plate system is ensured, the printing times can be prolonged, and the service life of the adhesive tape is prolonged. 3) The thickness tolerance of the double-sided adhesive tape is small. If the thickness tolerance is large, the adhesive tape at the lower part of the same printing plate is thicker, and the adhesive tape at the lower part of the same printing plate is thinner, so that the printing pressure is increased and the printing brush dots are increased; or the printing plate system is thinner, the printing pressure is smaller, the imprinting is not practical, and the printing quality cannot be ensured at all. 4) The double-sided adhesive tape has good shear resistance. In the printing process, the printing stock has the effect of tearing the printing plate in the opposite direction, and the acting force is balanced by the viscosity and shearing resistance of the adhesive tape, so that the adhesive tape needs to bear a certain shearing force, and if the shearing resistance of the adhesive tape is too poor, the adhesive tape is easily sheared in the printing process, so that the printing plate is shifted, and the printing quality cannot be ensured.
In summary, the double-sided adhesive tape for printing plates has the characteristics of high adhesive property, good initial adhesion, high cohesive strength, easy removal of non-residual adhesive, good ageing resistance and rebound resistance; the high-performance double-sided adhesive tape has good adhesion effect on printing plates made of various materials, has strong universality and can be repeatedly used for many times. The prior double-sided adhesive tape for fixing used in the printing plate industry has the problems of weak viscosity, low universality, poor rebound resistance and less repeated use times.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the acrylate pressure-sensitive adhesive and the double-sided adhesive tape for pasting and fixing the printing plates and the preparation method thereof, and the acrylate pressure-sensitive adhesive and the double-sided adhesive tape have the characteristics of high adhesive property, good initial adhesion, high cohesive strength, easy removal of residual adhesive, good ageing resistance and rebound resistance, have good pasting effect on printing plates made of various materials, have strong universality, can be repeatedly used for a plurality of times, obviously reduce the use cost, and can be widely used for pasting and fixing the printing plates.
The technical scheme adopted for solving the technical problems is as follows:
the acrylate pressure-sensitive adhesive for the printing plate comprises the following components in parts by mass: 35-50 parts of acrylic ester soft monomer; 5-20 parts of acrylate hard monomer; 0-5 parts of acrylic acid functional monomer; 0.1-1 part of initiator; 3-15 parts of tackifying resin; 0.2-2 parts of curing agent; 40-70 parts of solvent.
Preferably, the acrylic ester soft monomer comprises one or more of butyl acrylate, isooctyl acrylate and alkyl acrylate, the acrylic ester hard monomer is one or more of methyl methacrylate, styrene and vinyl acetate, and the acrylic acid functional monomer comprises one or more of acrylic acid, hydroxyethyl acrylate, hydroxypropyl acrylate and glycidyl methacrylate.
Preferably, the curing agent is an amino resin curing agent, an epoxy curing agent or an isocyanate curing agent.
Preferably, the tackifying resin is one or more of modified rosin tackifying resin, petroleum tackifying resin and terpene tackifying resin.
Preferably, the initiator comprises one or more of azobisisobutyronitrile, benzoyl peroxide and iso-lauroyl peroxide.
The invention also provides a double-sided adhesive tape for the printing plate, which comprises a substrate layer, an isolation layer and the acrylic acid ester pressure-sensitive adhesive for the printing plate, wherein the acrylic acid ester pressure-sensitive adhesive is coated on two sides of the substrate layer, and the isolation layer is adhered on the other surface of the acrylic acid ester pressure-sensitive adhesive.
The invention also provides a preparation method of the double-sided adhesive tape for the printing plate, which comprises the following steps: (1) Taking the acrylic ester soft monomer, the acrylic ester hard monomer and the acrylic acid functional monomer in parts by weight, uniformly mixing the acrylic ester soft monomer, the acrylic acid functional monomer and part of the acrylic ester hard monomer to obtain a mixed monomer, and adding a solvent and the mixed monomer into a reaction kettle; dissolving an initiator, adding 40% of initiator solution into a reaction kettle, heating for reaction, dropwise adding the residual acrylate hard monomer and 40% of initiator solution, preserving heat for self-reaction, then continuously dropwise adding the residual 20% of initiator solution, and continuously preserving heat for reaction; diluting to 40-45% of solid content to obtain colorless transparent viscous acrylate pressure-sensitive adhesive liquid; (2) When the adhesive is prepared, 70 parts of acrylate pressure-sensitive adhesive, 3-12 parts of tackifying resin, 0.2-2 parts of curing agent and 10-30 parts of solvent are added into a plastic cup, uniformly stirred, then coated on one side of a substrate layer, dried to form an acrylate pressure-sensitive adhesive layer, and a composite isolation layer is used for obtaining one side of a double-sided adhesive tape; and repeatedly coating one acrylic pressure-sensitive adhesive layer on the other side of the substrate layer to obtain the other side of the double-sided adhesive tape.
Preferably, the partial acrylate hard monomer is 50% -70% of the total acrylate hard monomer, the heating reaction condition is that the reaction is carried out for 2-3 hours at 70-80 ℃, the self-reaction time is 3 hours after heat preservation, and the continuous heat preservation reaction time is 3-5 hours.
The invention also provides a preparation method of the double-sided adhesive tape for the printing plate, which comprises the following steps: (1) Taking the acrylic ester soft monomer, the acrylic ester hard monomer and the acrylic acid functional monomer in parts by weight, uniformly mixing part of the acrylic ester soft monomer, the acrylic ester hard monomer and the acrylic acid functional monomer to obtain part of mixed monomer, and adding the solvent and part of mixed monomer into a reaction kettle; dissolving an initiator, adding 40% of initiator solution into a reaction kettle, heating for reaction, dropwise adding the rest mixed monomer and 40% of initiator solution, preserving heat for self-reaction, then continuously dropwise adding the rest 20% of initiator solution, and continuously preserving heat for reaction; diluting to 40-45% of solid content to obtain colorless transparent viscous acrylate pressure-sensitive adhesive liquid; (2) When the adhesive is prepared, 70 parts of acrylate pressure-sensitive adhesive, 3-12 parts of tackifying resin, 0.2-2 parts of curing agent and 10-30 parts of solvent are added into a plastic cup, uniformly stirred, then coated on one side of a substrate layer, dried to form an acrylate pressure-sensitive adhesive layer, and a composite isolation layer is used for obtaining one side of a double-sided adhesive tape; and repeatedly coating one acrylic pressure-sensitive adhesive layer on the other side of the substrate layer to obtain the other side of the double-sided adhesive tape.
Preferably, the partial mixed monomers are 60% -90% of the total amount of the mixed monomers, the heating reaction condition is that the reaction is carried out for 2-3 hours at 70-80 ℃, the self-reaction time is 3 hours after heat preservation, and the continuous heat preservation reaction time is 3-5 hours.
The invention also provides application of the acrylate pressure-sensitive adhesive for printing plates in printing plate adhesion and fixation.
The beneficial effects of the invention are as follows: the acrylic ester polymer is prepared from 35-50 parts of acrylic ester soft monomer, 5-20 parts of acrylic ester hard monomer and 0-5 parts of acrylic acid functional monomer, and has the characteristics of large molecular weight, molecular weight distribution in a specific range and large cohesive strength by selecting the types and the proportions of the acrylic ester monomers, and when glue is blended, the performances of stripping force, temperature resistance, later stability and the like are regulated by adopting tackifying resin with proper types and components and an external curing agent, so that the product can be used for pasting and fixing printing plate plates made of various materials and has proper adhesiveness, colloid hardness, anti-elasticity and shearing resistance. When the acrylate pressure-sensitive adhesive is used for manufacturing the double-sided adhesive tape, the stability and repeated use times of the double-sided adhesive tape in the use process can be ensured. The acrylate pressure-sensitive adhesive and the double-sided adhesive tape for pasting and fixing the printing plate, which are prepared by the invention, can be widely applied to the traditional printing plate industry and the flexible printing plate industry.
Drawings
Fig. 1 is a schematic view of the structure of a double-sided adhesive tape according to the present invention.
In the figure, 1-substrate layer; a 2-acrylate pressure sensitive adhesive layer; 3-isolating layer.
Detailed Description
The present invention will be further described with reference to examples for more clearly showing the present invention.
The acrylic pressure-sensitive adhesive for the printing plate comprises the following components in parts by mass: 35-50 parts of acrylic ester soft monomer; 5-20 parts of acrylate hard monomer; 0-5 parts of acrylic acid functional monomer; 0.1-1 part of initiator; 3-15 parts of tackifying resin; 0.2-2 parts of curing agent; 40-70 parts of solvent.
Wherein the acrylic ester soft monomer comprises one or more of butyl acrylate, isooctyl acrylate and alkyl acrylate. The acrylate hard monomer is one or more of methyl methacrylate, styrene and vinyl acetate. The acrylic functional monomer comprises one or more of acrylic acid, hydroxyethyl acrylate, hydroxypropyl acrylate and glycidyl methacrylate.
The curing agent is amino resin curing agent, epoxy curing agent and isocyanate curing agent, preferably isocyanate curing agent, including monofunctional, difunctional and polyfunctional isocyanate curing agent.
The tackifying resin is one or more of modified rosin tackifying resin, petroleum tackifying resin and terpene tackifying resin.
The initiator comprises one or more of azodiisobutyronitrile, benzoyl peroxide and lauroyl peroxide.
The solvent includes ethyl acetate, butyl acetate, ethanol, isopropanol, etc., preferably ethyl acetate. The solvent is environment-friendly, and solvents with high toxicity and high risk level such as benzene, toluene, ketone and the like are not used.
The invention has the advantages that: the acrylic ester polymer is prepared from 35-50 parts of acrylic ester soft monomer, 5-20 parts of acrylic ester hard monomer and 0-5 parts of acrylic acid functional monomer, and has the characteristics of large molecular weight, molecular weight distribution in a specific range and large cohesive strength by selecting the types and the proportions of the acrylic ester monomers, and when glue is blended, the performances of stripping force, temperature resistance, later stability and the like are regulated by adopting tackifying resin with proper types and components and an external curing agent, so that the product can be used for pasting and fixing printing plate plates made of various materials and has proper adhesiveness, colloid hardness, anti-elasticity and shearing resistance. When the acrylate pressure-sensitive adhesive is used for manufacturing the double-sided adhesive tape, the stability and repeated use times of the double-sided adhesive tape in the use process can be ensured. The acrylate pressure-sensitive adhesive and the double-sided adhesive tape for pasting and fixing the printing plate, which are prepared by the invention, can be widely applied to the traditional printing plate industry and the flexible printing plate industry.
The invention also provides a double-sided adhesive tape for printing plates and a preparation method thereof, which specifically adopts a reaction process of solution polymerization and comprises the following steps: (1) Taking 35-50 parts of acrylic ester soft monomer, 5-20 parts of acrylic ester hard monomer and 0-5 parts of acrylic acid functional monomer, uniformly mixing 35-50 parts of acrylic ester soft monomer, 0-5 parts of acrylic acid functional monomer and part of acrylic ester hard monomer to obtain mixed monomer, and adding a solvent and the mixed monomer into a reaction kettle; dissolving an initiator, adding 40% of initiator solution into a reaction kettle, heating for reaction, dropwise adding the residual acrylate hard monomer and 40% of initiator solution, preserving heat for self-reaction, then continuously dropwise adding the residual 20% of initiator solution, and continuously preserving heat for reaction; diluting to 40-45% of solid content to obtain colorless transparent viscous acrylate pressure-sensitive adhesive liquid; (2) When glue is prepared, 70 parts of acrylic pressure-sensitive adhesive, 3-12 parts of tackifying resin, 0.2-2 parts of curing agent and 10-30 parts of solvent are added into a plastic cup, uniformly stirred, then coated on one side of a substrate layer 1, dried to form an acrylic pressure-sensitive adhesive layer 2, and a composite isolation layer 3 is used for obtaining one side of a double-sided adhesive tape; and repeatedly coating one layer of acrylic pressure-sensitive adhesive layer 2 on the other side of the substrate layer 1 to obtain the other side of the double-sided adhesive tape.
Wherein, in the step (1), the partial acrylate hard monomer accounts for 50% -70% of the total acrylate hard monomer, the heating reaction condition is that the reaction is carried out for 2-3h at 70-80 ℃, the self-reaction time is 3h after heat preservation, and the continuous heat preservation reaction time is 3-5h.
Example 1
Putting 46 parts of solvent into a reaction kettle with a thermometer, a condenser and an emulsifying tank, uniformly mixing 15 parts of butyl acrylate, 20 parts of isooctyl acrylate, 1.5 parts of acrylic acid and 8 parts of vinyl acetate monomer according to parts by mass, and then adding into the reaction kettle; introducing nitrogen into the reaction kettle, starting stirring and heating, heating to 80 ℃, then dissolving 0.05 part of benzoyl peroxide initiator by using a solvent, adding the benzoyl peroxide initiator into the reaction kettle, and reacting for 120 minutes; 3 parts of vinyl acetate, 8 parts of solvent and 0.05 part of benzoyl peroxide initiator mixed solution are dropwise added, the dropwise addition is completed in 30 minutes, the self-reaction is carried out for 3 hours under the heat preservation, then 0.025 part of azodiisobutyronitrile initiator solution is dissolved in the solvent, the dropwise addition is completed in 10 minutes, the heat preservation is continued for 3-5 hours, and the solvent is added for dilution to 35% -45% of solid content, so that colorless transparent viscous acrylate pressure-sensitive adhesive liquid is obtained.
And during glue mixing, 70 parts of the acrylic pressure-sensitive adhesive, 0.36 part of isocyanate curing agent, 3 parts of modified rosin tackifying resin and 24 parts of ethyl acetate solvent are added into a glue opening container and uniformly stirred, so that an acrylic pressure-sensitive adhesive glue mixing formula is obtained.
The formula is coated on a 50 mu m PET substrate layer 1, the thickness is 50+/-5 mu m, the composite isolation layer 3 is dried for 2 minutes at the temperature of 110+/-5 ℃ to obtain a single side of the double-sided adhesive tape, the other side of the single side of the double-sided adhesive tape is repeatedly coated with glue with the thickness of 50+/-5 mu m, and the double-sided adhesive tape is rolled into a finished product of the double-sided adhesive tape for the printing plate.
Example 2
Putting 46 parts of solvent into a reaction kettle with a thermometer, a condenser and an emulsifying tank, uniformly mixing 15 parts of butyl acrylate, 20 parts of isooctyl acrylate, 1.5 parts of acrylic acid and 8 parts of vinyl acetate monomer according to parts by mass, and then adding into the reaction kettle; introducing nitrogen into the reaction kettle, starting stirring and heating, heating to 80 ℃, then dissolving 0.05 part of benzoyl peroxide initiator by using a solvent, adding the benzoyl peroxide initiator into the reaction kettle, and reacting for 120 minutes; 3 parts of vinyl acetate, 8 parts of solvent and 0.05 part of benzoyl peroxide initiator mixed solution are dropwise added, the dropwise addition is completed in 30 minutes, the self-reaction is carried out for 3 hours under the heat preservation, then 0.025 part of azodiisobutyronitrile initiator solution is dissolved in the solvent, the dropwise addition is completed in 10 minutes, the heat preservation is continued for 3-5 hours, and the solvent is added for dilution to 35% -45% of solid content, so that colorless transparent viscous acrylate pressure-sensitive adhesive liquid is obtained.
And during glue mixing, 70 parts of the acrylic pressure-sensitive adhesive, 0.42 part of isocyanate curing agent, 6 parts of modified rosin tackifying resin and 24 parts of ethyl acetate solvent are added into a glue opening container to be uniformly mixed, so that an acrylic pressure-sensitive adhesive glue mixing formula is obtained.
The formula is coated on a 50 mu m PET substrate layer 1, the thickness is 50+/-5 mu m, the composite isolation layer 3 is dried for 2 minutes at the temperature of 110+/-5 ℃ to obtain a single side of the double-sided adhesive tape, the other side of the single side of the double-sided adhesive tape is repeatedly coated with glue with the thickness of 50+/-5 mu m, and the double-sided adhesive tape is rolled into a finished product of the double-sided adhesive tape for the printing plate.
Example 3
Putting 46 parts of solvent into a reaction kettle with a thermometer, a condenser and an emulsifying tank, uniformly mixing 13.5 parts of butyl acrylate, 16 parts of isooctyl acrylate, 3 parts of acrylic acid, 12 parts of vinyl acetate and 1 part of glycidyl methacrylate monomer according to parts by mass, and adding into the reaction kettle; introducing nitrogen into the reaction kettle, starting stirring and heating, heating to 80 ℃, then dissolving 0.05 part of benzoyl peroxide initiator by using a solvent, adding the benzoyl peroxide initiator into the reaction kettle, and reacting for 120 minutes; 3 parts of vinyl acetate, 8 parts of solvent and 0.05 part of benzoyl peroxide initiator mixed solution are dropwise added, the dropwise addition is completed in 30 minutes, the self-reaction is carried out for 3 hours under the heat preservation, then 0.025 part of azodiisobutyronitrile initiator solution is dissolved in the solvent, the dropwise addition is completed in 10 minutes, the heat preservation is continued for 3-5 hours, and the solvent is added for dilution to 35% -45% of solid content, so that colorless transparent viscous acrylate pressure-sensitive adhesive liquid is obtained.
And during glue mixing, 70 parts of the acrylic pressure-sensitive adhesive, 0.36 part of isocyanate curing agent, 3 parts of modified rosin tackifying resin and 24 parts of ethyl acetate solvent are added into a glue opening container and uniformly stirred, so that an acrylic pressure-sensitive adhesive glue mixing formula is obtained.
The formula is coated on a 50 mu m PET substrate layer 1, the thickness is 50+/-5 mu m, the composite isolation layer 3 is dried for 2 minutes at the temperature of 110+/-5 ℃ to obtain a single side of the double-sided adhesive tape, the other side of the single side of the double-sided adhesive tape is repeatedly coated with glue with the thickness of 50+/-5 mu m, and the double-sided adhesive tape is rolled into a finished product of the double-sided adhesive tape for the printing plate.
Example 4
Putting 46 parts of solvent into a reaction kettle with a thermometer, a condenser and an emulsifying tank, uniformly mixing 13.5 parts of butyl acrylate, 16 parts of isooctyl acrylate, 3 parts of acrylic acid, 12 parts of vinyl acetate and 1 part of glycidyl methacrylate monomer according to parts by mass, and adding into the reaction kettle; introducing nitrogen into the reaction kettle, starting stirring and heating, heating to 80 ℃, then dissolving 0.05 part of benzoyl peroxide initiator by using a solvent, adding the benzoyl peroxide initiator into the reaction kettle, and reacting for 120 minutes; 3 parts of vinyl acetate, 8 parts of solvent and 0.05 part of benzoyl peroxide initiator mixed solution are dropwise added, the dropwise addition is completed in 30 minutes, the self-reaction is carried out for 3 hours under the heat preservation, then 0.025 part of azodiisobutyronitrile initiator solution is dissolved in the solvent, the dropwise addition is completed in 10 minutes, the heat preservation is continued for 3-5 hours, and the solvent is added for dilution to 35% -45% of solid content, so that colorless transparent viscous acrylate pressure-sensitive adhesive liquid is obtained.
And during glue mixing, 70 parts of the acrylic pressure-sensitive adhesive, 0.42 part of isocyanate curing agent, 6 parts of modified rosin tackifying resin and 24 parts of ethyl acetate solvent are added into a glue opening container to be uniformly mixed, so that an acrylic pressure-sensitive adhesive glue mixing formula is obtained.
The formula is coated on a 50 mu m PET substrate layer 1, the thickness is 50+/-5 mu m, the composite isolation layer 3 is dried for 2 minutes at the temperature of 110+/-5 ℃ to obtain a single side of the double-sided adhesive tape, the other side of the single side of the double-sided adhesive tape is repeatedly coated with glue with the thickness of 50+/-5 mu m, and the double-sided adhesive tape is rolled into a finished product of the double-sided adhesive tape for the printing plate.
Example 5
Putting 46 parts of solvent into a reaction kettle with a thermometer, a condenser and an emulsifying tank, uniformly mixing 13.5 parts of butyl acrylate, 16 parts of isooctyl acrylate, 3 parts of acrylic acid, 12 parts of vinyl acetate and 1 part of glycidyl methacrylate monomer according to parts by mass, and adding into the reaction kettle; introducing nitrogen into the reaction kettle, starting stirring and heating, heating to 80 ℃, then dissolving 0.05 part of benzoyl peroxide initiator by using a solvent, adding the benzoyl peroxide initiator into the reaction kettle, and reacting for 120 minutes; 3 parts of vinyl acetate, 8 parts of solvent and 0.05 part of benzoyl peroxide initiator mixed solution are dropwise added, the dropwise addition is completed in 30 minutes, the self-reaction is carried out for 3 hours under the heat preservation, then 0.025 part of azodiisobutyronitrile initiator solution is dissolved in the solvent, the dropwise addition is completed in 10 minutes, the heat preservation is continued for 3-5 hours, and the solvent is added for dilution to 35% -45% of solid content, so that colorless transparent viscous acrylate pressure-sensitive adhesive liquid is obtained.
And during glue mixing, 70 parts of the acrylic pressure-sensitive adhesive, 0.48 part of isocyanate curing agent, 9 parts of modified rosin tackifying resin and 24 parts of ethyl acetate solvent are added into a glue opening container and uniformly stirred, so that an acrylic pressure-sensitive adhesive glue mixing formula is obtained.
The formula is coated on a 50 mu m PET substrate layer 1, the thickness is 50+/-5 mu m, the composite isolation layer 3 is dried for 2 minutes at the temperature of 110+/-5 ℃ to obtain a single side of the double-sided adhesive tape, the other side of the single side of the double-sided adhesive tape is repeatedly coated with glue with the thickness of 50+/-5 mu m, and the double-sided adhesive tape is rolled into a finished product of the double-sided adhesive tape for the printing plate.
The invention also provides a preparation method of the double-sided adhesive tape for the printing plate, which also adopts a reaction process of solution polymerization, and comprises the following steps: (1) Taking 35-50 parts of acrylic ester soft monomer, 5-20 parts of acrylic ester hard monomer and 0-5 parts of acrylic acid functional monomer, uniformly mixing the parts to obtain a part of mixed monomer, and adding the solvent and the part of mixed monomer into a reaction kettle; dissolving an initiator, adding 40% of initiator solution into a reaction kettle, heating for reaction, dropwise adding the rest mixed monomer and 40% of initiator solution, preserving heat for self-reaction, then continuously dropwise adding the rest 20% of initiator solution, and continuously preserving heat for reaction; diluting to 40-45% of solid content to obtain colorless transparent viscous acrylate pressure-sensitive adhesive liquid; (2) When glue is prepared, 70 parts of acrylic pressure-sensitive adhesive, 3-12 parts of tackifying resin, 0.2-2 parts of curing agent and 10-30 parts of solvent are added into a plastic cup, uniformly stirred, then coated on one side of a substrate layer 1, dried to form an acrylic pressure-sensitive adhesive layer 2, and a composite isolation layer 3 is used for obtaining one side of a double-sided adhesive tape; and repeatedly coating one layer of acrylic pressure-sensitive adhesive layer 2 on the other side of the substrate layer 1 to obtain the other side of the double-sided adhesive tape.
Wherein, in the step (1), the part of the mixed monomers accounts for 60% -90% of the total amount of the mixed monomers, the heating reaction condition is that the reaction is carried out for 2-3h at 70-80 ℃, the self-reaction time is kept at 3h, and the continuous heat-preserving reaction time is 3-5h.
Example 6
Putting 46 parts of solvent into a reaction kettle with a thermometer, a condenser and an emulsifying tank, uniformly mixing 9 parts of butyl acrylate, 12 parts of isooctyl acrylate, 0.9 part of acrylic acid and 6.6 parts of vinyl acetate monomer according to parts by mass, and then adding into the reaction kettle; introducing nitrogen into the reaction kettle, starting stirring and heating, heating to 80 ℃, then dissolving 0.05 part of benzoyl peroxide initiator by using a solvent, adding the benzoyl peroxide initiator into the reaction kettle, and reacting for 120 minutes; and (3) dropwise adding 6 parts of butyl acrylate, 8 parts of isooctyl acrylate, 0.9 part of acrylic acid, 4.4 parts of vinyl acetate and 8 parts of solvent to dissolve 0.05 part of benzoyl peroxide initiator mixed solution, dropwise adding the solution for 30 minutes, keeping the temperature for self-reaction for 3 hours, dissolving 0.025 part of azodiisobutyronitrile initiator solution by using the solvent, dropwise adding the solution within 10 minutes, keeping the temperature for 3-5 hours, adding the solvent to dilute the solution to 35-45% of solid content, and obtaining the light yellow transparent viscous acrylate pressure-sensitive adhesive liquid.
And during glue mixing, 70 parts of the acrylic pressure-sensitive adhesive, 0.36 part of isocyanate curing agent, 6 parts of modified rosin tackifying resin and 24 parts of ethyl acetate solvent are added into a glue opening container to be uniformly mixed, so that an acrylic pressure-sensitive adhesive glue mixing formula is obtained.
The formula is coated on a 50 mu m PET substrate layer 1, the thickness is 50+/-5 mu m, the composite isolation layer 3 is dried for 2 minutes at the temperature of 110+/-5 ℃ to obtain a single side of the double-sided adhesive tape, the other side of the single side of the double-sided adhesive tape is repeatedly coated with glue with the thickness of 50+/-5 mu m, and the double-sided adhesive tape is rolled into a finished product of the double-sided adhesive tape for the printing plate.
Example 7
Putting 46 parts of solvent into a reaction kettle with a thermometer, a condenser and an emulsifying tank, uniformly mixing 10.5 parts of butyl acrylate, 14 parts of isooctyl acrylate, 1.05 parts of acrylic acid and 7.7 parts of vinyl acetate monomer according to parts by mass, and then adding into the reaction kettle; introducing nitrogen into the reaction kettle, starting stirring and heating, heating to 80 ℃, then dissolving 0.05 part of benzoyl peroxide initiator by using a solvent, adding the benzoyl peroxide initiator into the reaction kettle, and reacting for 120 minutes; 4.5 parts of butyl acrylate, 6 parts of isooctyl acrylate, 0.45 part of acrylic acid, 3.3 parts of vinyl acetate and 8 parts of solvent are added dropwise to dissolve 0.05 part of benzoyl peroxide initiator mixed solution, the dropwise addition is completed within 30 minutes, the self-reaction is carried out for 3 hours under the heat preservation condition, then 0.025 part of azobisisobutyronitrile initiator solution is dissolved by the solvent, the dropwise addition is completed within 10 minutes, the heat preservation is continued for 3-5 hours, and the solvent is added to dilute to 35% -45% of solid content, so that the light yellow transparent viscous acrylate pressure-sensitive adhesive liquid is obtained.
And during glue mixing, 70 parts of the acrylic pressure-sensitive adhesive, 0.36 part of isocyanate curing agent, 6 parts of modified rosin tackifying resin and 24 parts of ethyl acetate solvent are added into a glue opening container to be uniformly mixed, so that an acrylic pressure-sensitive adhesive glue mixing formula is obtained.
The formula is coated on a 50 mu m PET substrate layer 1, the thickness is 50+/-5 mu m, the composite isolation layer 3 is dried for 2 minutes at the temperature of 110+/-5 ℃ to obtain a single side of the double-sided adhesive tape, the other side of the single side of the double-sided adhesive tape is repeatedly coated with glue with the thickness of 50+/-5 mu m, and the double-sided adhesive tape is rolled into a finished product of the double-sided adhesive tape for the printing plate.
The invention also provides application of the acrylate pressure-sensitive adhesive for printing plates in printing plate adhesion and fixation. Unlike the traditional one-pot cooking "
The invention selects the proper acrylic ester monomer and the acrylic ester polymer synthesized by proportion, has the advantages of large molecular weight, large molecular weight distribution in a specific range and high cohesive strength, adopts proper tackifying resin and external curing agent to adjust the peeling force, temperature resistance, later stability and other performances of the double-sided adhesive tape, so that the product can be used for pasting and fixing various material printing plate materials, and simultaneously has proper adhesiveness, colloid hardness, anti-rebound elasticity and shearing resistance, and can ensure the stability and repeated use times of the double-sided adhesive tape in the use process. The double-sided adhesive tape for pasting and fixing the printing plate, which is prepared by the invention, is widely applied to the traditional printing plate industry and the flexible printing plate industry.
Comparative example 1
Putting 46 parts of solvent into a reaction kettle with a thermometer, a condenser and an emulsifying tank, uniformly mixing 15 parts of butyl acrylate, 20 parts of isooctyl acrylate, 1.5 parts of acrylic acid and 8 parts of vinyl acetate monomer according to parts by mass, and then adding into the reaction kettle; introducing nitrogen into the reaction kettle, starting stirring and heating, heating to 80 ℃, then dissolving 0.05 part of benzoyl peroxide initiator by using a solvent, adding the benzoyl peroxide initiator into the reaction kettle, and reacting for 120 minutes; 3 parts of vinyl acetate, 8 parts of solvent and 0.05 part of benzoyl peroxide initiator mixed solution are dropwise added, the dropwise addition is completed in 30 minutes, the self-reaction is carried out for 3 hours under the heat preservation, then 0.025 part of azodiisobutyronitrile initiator solution is dissolved in the solvent, the dropwise addition is completed in 10 minutes, the heat preservation is continued for 3-5 hours, and the solvent is added for dilution to 35% -45% of solid content, so that colorless transparent viscous acrylate pressure-sensitive adhesive liquid is obtained.
And during glue mixing, 70 parts of the acrylic pressure-sensitive adhesive, 0.36 part of isocyanate curing agent and 24 parts of ethyl acetate solvent are added into a glue opening container and uniformly stirred, so that an acrylic pressure-sensitive adhesive glue mixing formula is obtained.
The formula is coated on a 50 mu m PET substrate layer 1, the thickness is 50+/-5 mu m, the composite isolation layer 3 is dried for 2 minutes at the temperature of 110+/-5 ℃ to obtain a single side of the double-sided adhesive tape, the other side of the single side of the double-sided adhesive tape is repeatedly coated with glue with the thickness of 50+/-5 mu m, and the double-sided adhesive tape is rolled into a finished product of the double-sided adhesive tape for the printing plate. .
Performance test method
1.180 ° peel force: according to the standard of GB/T2792-2014 test method for adhesive tape peel strength, a peel force tensile tester is adopted to measure the width of the adhesive tape to be 25mm, a PET substrate layer 1 back paste of 25 mu m is adopted as reinforcement, and the peel rate is 300mm/min.
2. Initial tack: the inclination angle was measured at 30℃by using an initial tackiness meter according to the standard of GB/T4852-2002 "ball method for initial tackiness test method of pressure sensitive adhesive tape".
3. Holding viscosity: the measurement was carried out according to GB/T4851-2014 standard. And vertically hanging the adhered sample adhered with the pressure-sensitive adhesive tape on a test stand, hanging weights with specified mass, and representing the holding viscosity of the pressure-sensitive adhesive according to the displacement of the adhered sample sliding downwards for a certain time or the time of the adhered sample completely separating.
4. Rebound resistance: and (3) attaching the double-sided adhesive tape to the cleaned special printing plate, tearing off the other side of the isolation layer 3, attaching the isolation layer to the special printing cylinder part, compacting each attaching part of the printing plate, placing at normal temperature, and observing whether the edge is flicked or not in 24 hours. No spring open or displacement, and judging as A+; slightly flicking, wherein the flicking height is within 5mm, and no displacement exists, and the judgment is A; slightly flicking, wherein the flicking height is more than 5mm, and no displacement exists, and the judgment is A-;
5. residual tackiness: and (5) testing the rebound resistance, namely tearing the printing cylinder or the printing plate after 24 hours, and observing whether residual glue exists on the printing cylinder or the printing plate.
6. The number of times of use: and (3) performing an anti-rebound test, namely after 24 hours, tearing, observing whether residual glue exists or not, if no bouncing off exists, continuously repeating the pasting test, and after 24 hours, continuously repeating the tearing off pasting test until the bouncing off and residual glue phenomenon occurs, and ending the test.
TABLE 1 double-sided adhesive tape test results Table for printing plate fixing
As shown by test results, the acrylic acid ester pressure-sensitive adhesive and the double-sided adhesive tape for fixing the printing plate have the characteristics of high adhesive property, good initial adhesion, high cohesive strength, easy removal of residual adhesive, good ageing resistance and rebound resistance; the printing plate has good pasting effect on printing plates made of various materials, has strong universality and can be repeatedly used for many times.
While the preferred embodiment of the present invention has been illustrated and described, it will be understood by those skilled in the art that the present invention may be embodied in other specific forms and equivalents thereof without departing from the spirit of the invention.
Claims (10)
1. The acrylic pressure-sensitive adhesive for the printing plate is characterized by comprising the following components in parts by weight:
2. the acrylate pressure sensitive adhesive for printing plates according to claim 1, wherein the acrylate soft monomer comprises one or more of butyl acrylate, isooctyl acrylate and alkyl acrylate, the acrylate hard monomer is one or more of methyl methacrylate, styrene and vinyl acetate, and the acrylic functional monomer comprises one or more of acrylic acid, hydroxyethyl acrylate, hydroxypropyl acrylate and glycidyl methacrylate.
3. The acrylate pressure sensitive adhesive for printing plates according to claim 1, wherein the curing agent is one or more of an amino resin curing agent, an epoxy curing agent, and an isocyanate curing agent.
4. The acrylate pressure sensitive adhesive for printing plates according to claim 1, wherein the tackifying resin is one or more of a modified rosin tackifying resin, a petroleum tackifying resin, a terpene tackifying resin.
5. A double-sided adhesive tape for printing plates, comprising a substrate layer, and further comprising a release layer, the acrylate pressure-sensitive adhesive for printing plates according to any one of claims 1 to 4 coated on both sides of the substrate layer, the release layer being attached to the other surface of the acrylate pressure-sensitive adhesive.
6. A method for preparing a double-sided adhesive tape for printing plates, comprising the steps of:
(1) Taking the acrylic ester soft monomer, the acrylic ester hard monomer and the acrylic acid functional monomer according to the mass part in the claim 1, uniformly mixing the acrylic ester soft monomer, the acrylic acid functional monomer and part of the acrylic ester hard monomer to obtain a mixed monomer, and adding a solvent and the mixed monomer into a reaction kettle; dissolving an initiator, adding 40% of initiator solution into a reaction kettle, heating for reaction, dropwise adding the residual acrylate hard monomer and 40% of initiator solution, preserving heat for self-reaction, then continuously dropwise adding the residual 20% of initiator solution, and continuously preserving heat for reaction; diluting to 40-45% of solid content to obtain colorless transparent viscous acrylate pressure-sensitive adhesive liquid;
(2) When the adhesive is prepared, 70 parts of acrylate pressure-sensitive adhesive, 3-12 parts of tackifying resin, 0.2-2 parts of curing agent and 10-30 parts of solvent are added into a plastic cup, uniformly stirred, then coated on one side of a substrate layer, dried to form an acrylate pressure-sensitive adhesive layer, and a composite isolation layer is used for obtaining one side of a double-sided adhesive tape; and repeatedly coating one acrylic pressure-sensitive adhesive layer on the other side of the substrate layer to obtain the other side of the double-sided adhesive tape.
7. The method of producing a double-sided adhesive tape for printing plates according to claim 6, wherein the partial acrylate hard monomer in the step (1) is 50% -70% of the total acrylate hard monomer, the heating reaction is carried out at 70-80 ℃ for 2-3 hours, the self-reaction time is 3 hours, and the continuous heat-preserving reaction time is 3-5 hours.
8. A method for preparing a double-sided adhesive tape for printing plates, comprising the steps of:
(1) Taking the acrylic ester soft monomer, the acrylic ester hard monomer and the acrylic acid functional monomer according to the mass part in the claim 1, uniformly mixing part of the acrylic ester soft monomer, the acrylic ester hard monomer and the acrylic acid functional monomer to obtain part of mixed monomer, and adding the solvent and part of mixed monomer into a reaction kettle; dissolving an initiator, adding 40% of initiator solution into a reaction kettle, heating for reaction, dropwise adding the rest mixed monomer and 40% of initiator solution, preserving heat for self-reaction, then continuously dropwise adding the rest 20% of initiator solution, and continuously preserving heat for reaction; diluting to 40-45% of solid content to obtain colorless transparent viscous acrylate pressure-sensitive adhesive liquid;
(2) When the adhesive is prepared, 70 parts of acrylate pressure-sensitive adhesive, 3-12 parts of tackifying resin, 0.2-2 parts of curing agent and 10-30 parts of solvent are added into a plastic cup, uniformly stirred, then coated on one side of a substrate layer, dried to form an acrylate pressure-sensitive adhesive layer, and a composite isolation layer is used for obtaining one side of a double-sided adhesive tape; and repeatedly coating one acrylic pressure-sensitive adhesive layer on the other side of the substrate layer to obtain the other side of the double-sided adhesive tape.
9. The method for producing a double-sided adhesive tape for printing plates according to claim 8, wherein the partially mixed monomer in the step (1) is 60% -90% of the total amount of the mixed monomers, the heating reaction is carried out at 70-80 ℃ for 2-3 hours, the self-reaction is carried out at a temperature of 3 hours, and the continuous heat-preserving reaction is carried out for 3-5 hours.
10. Use of the acrylate pressure-sensitive adhesive for printing plates according to claim 5 for the attachment of printing plates.
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