CN114644900A - UV (ultraviolet) viscosity-reducing composition, UV viscosity-reducing adhesive tape and method for preparing UV viscosity-reducing adhesive tape - Google Patents
UV (ultraviolet) viscosity-reducing composition, UV viscosity-reducing adhesive tape and method for preparing UV viscosity-reducing adhesive tape Download PDFInfo
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- CN114644900A CN114644900A CN202210354347.0A CN202210354347A CN114644900A CN 114644900 A CN114644900 A CN 114644900A CN 202210354347 A CN202210354347 A CN 202210354347A CN 114644900 A CN114644900 A CN 114644900A
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- curing
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- 239000002390 adhesive tape Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims abstract description 76
- -1 acrylate compound Chemical class 0.000 claims abstract description 64
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 61
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- 239000012752 auxiliary agent Substances 0.000 claims abstract description 48
- 230000001603 reducing effect Effects 0.000 claims abstract description 35
- 239000000853 adhesive Substances 0.000 claims abstract description 23
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- AHDSRXYHVZECER-UHFFFAOYSA-N 2,4,6-tris[(dimethylamino)methyl]phenol Chemical compound CN(C)CC1=CC(CN(C)C)=C(O)C(CN(C)C)=C1 AHDSRXYHVZECER-UHFFFAOYSA-N 0.000 claims description 17
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- MPIAGWXWVAHQBB-UHFFFAOYSA-N [3-prop-2-enoyloxy-2-[[3-prop-2-enoyloxy-2,2-bis(prop-2-enoyloxymethyl)propoxy]methyl]-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(COC(=O)C=C)(COC(=O)C=C)COCC(COC(=O)C=C)(COC(=O)C=C)COC(=O)C=C MPIAGWXWVAHQBB-UHFFFAOYSA-N 0.000 claims description 8
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- FDSUVTROAWLVJA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol;prop-2-enoic acid Chemical compound OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.OCC(CO)(CO)COCC(CO)(CO)CO FDSUVTROAWLVJA-UHFFFAOYSA-N 0.000 claims description 3
- XMLYCEVDHLAQEL-UHFFFAOYSA-N 2-hydroxy-2-methyl-1-phenylpropan-1-one Chemical compound CC(C)(O)C(=O)C1=CC=CC=C1 XMLYCEVDHLAQEL-UHFFFAOYSA-N 0.000 claims description 3
- NNAHKQUHXJHBIV-UHFFFAOYSA-N 2-methyl-1-(4-methylthiophen-2-yl)-2-morpholin-4-ylpropan-1-one Chemical compound CC1=CSC(C(=O)C(C)(C)N2CCOCC2)=C1 NNAHKQUHXJHBIV-UHFFFAOYSA-N 0.000 claims description 3
- KTALPKYXQZGAEG-UHFFFAOYSA-N 2-propan-2-ylthioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(C(C)C)=CC=C3SC2=C1 KTALPKYXQZGAEG-UHFFFAOYSA-N 0.000 claims description 3
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- 235000008411 Sumatra benzointree Nutrition 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 3
- 229960002130 benzoin Drugs 0.000 claims description 3
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 claims description 3
- 239000012965 benzophenone Substances 0.000 claims description 3
- WTEPWWCRWNCUNA-UHFFFAOYSA-M benzyl(triphenyl)phosphanium;bromide Chemical compound [Br-].C=1C=CC=CC=1[P+](C=1C=CC=CC=1)(C=1C=CC=CC=1)CC1=CC=CC=C1 WTEPWWCRWNCUNA-UHFFFAOYSA-M 0.000 claims description 3
- XEHUIDSUOAGHBW-UHFFFAOYSA-N chromium;pentane-2,4-dione Chemical compound [Cr].CC(=O)CC(C)=O.CC(=O)CC(C)=O.CC(=O)CC(C)=O XEHUIDSUOAGHBW-UHFFFAOYSA-N 0.000 claims description 3
- XXBDWLFCJWSEKW-UHFFFAOYSA-N dimethylbenzylamine Chemical compound CN(C)CC1=CC=CC=C1 XXBDWLFCJWSEKW-UHFFFAOYSA-N 0.000 claims description 3
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- 229910021645 metal ion Inorganic materials 0.000 claims description 3
- RPQRDASANLAFCM-UHFFFAOYSA-N oxiran-2-ylmethyl prop-2-enoate Chemical compound C=CC(=O)OCC1CO1 RPQRDASANLAFCM-UHFFFAOYSA-N 0.000 claims description 3
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 3
- HWCKGOZZJDHMNC-UHFFFAOYSA-M tetraethylammonium bromide Chemical compound [Br-].CC[N+](CC)(CC)CC HWCKGOZZJDHMNC-UHFFFAOYSA-M 0.000 claims description 3
- HVYVMSPIJIWUNA-UHFFFAOYSA-N triphenylstibine Chemical compound C1=CC=CC=C1[Sb](C=1C=CC=CC=1)C1=CC=CC=C1 HVYVMSPIJIWUNA-UHFFFAOYSA-N 0.000 claims description 3
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
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- 235000012431 wafers Nutrition 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
-
- 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
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
-
- 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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
-
- 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
-
- 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
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
Abstract
The invention discloses a UV viscosity-reducing composition, a UV viscosity-reducing adhesive tape and a method for preparing the UV viscosity-reducing adhesive tape, wherein the UV viscosity-reducing composition comprises the following components in parts by weight: 50-100 parts of acrylate pressure-sensitive adhesive containing carboxyl, 2-50 parts of multifunctional acrylate compound, 1-20 parts of auxiliary agent, 0.001-0.5 part of curing accelerator and 0.1-3 parts of photoinitiator; the auxiliary agent comprises an active group, wherein the active group comprises at least one of an epoxy group and an amino group. Therefore, the components are supported and matched with each other in function, so that the composition disclosed by the invention can achieve the effect of grafting double bonds to the side chains of the pressure-sensitive adhesive in the curing process, thereby achieving the purposes of increasing the molecular weight and reducing the residual adhesive.
Description
Technical Field
The invention belongs to the technical field of materials, and particularly relates to a UV (ultraviolet) viscosity-reducing composition, a UV viscosity-reducing adhesive tape and a method for preparing the UV viscosity-reducing adhesive tape.
Background
With the development of electronic products, more attention and demands are paid to the UV anti-adhesive tapes used in the manufacturing process. For the fixed protection of materials such as integrated circuit boards, wafers, glass, ceramics and the like in the cutting process, the adhesive tape is required to have high adhesive force in the cutting process, so that products are prevented from falling off and flying apart, and the breakage in the cutting process is reduced; meanwhile, the viscosity of the adhesive tape is reduced after UV irradiation, and the product is easy to pick up.
The UV viscosity-reducing adhesive tape usually comprises a three-layer structure of a protective film, a UV viscosity-reducing adhesive layer and a base material, when products such as glass and the like need to be fixed and protected, the protective film of the UV viscosity-reducing adhesive tape is uncovered, and the UV viscosity-reducing adhesive layer is pasted and fixed on the products, so that the operation process is simple. The UV detackifying adhesive layer is reduced in viscosity by UV (ultraviolet) irradiation, and the UV detackifying adhesive tape is removed from a product such as glass after UV irradiation. The UV viscosity-reducing adhesive tape requires that the viscosity is greatly reduced after UV irradiation, and the residual adhesive on the product is little or even no residual adhesive. Most of the UV visbreaking adhesive layers on the market adopt a compounding method, and adhesive residues can appear on products such as glass and the like.
Therefore, there is a need for an improved UV detackifying tape.
Disclosure of Invention
The inventors have found that conventional UV visbreaking adhesives are generally achieved in two ways: the first method is that macromolecule pressure-sensitive adhesive with double bonds on the side chain is used as UV adhesive reducing agent, and under the condition of UV light irradiation, the double bonds are crosslinked to generate a crosslinked network structure, thereby realizing the photocuring effect; and secondly, a compounding method is adopted, and a photo-curing component is doped into the pressure-sensitive adhesive to realize the photo-curing effect under the condition of UV light irradiation. The first mode has the problems of complex process, high energy consumption, potential safety hazard and the like; in the second mode, due to the fact that the number of the small molecular substances is too large and the molecular weight is not large enough, the small molecular substances migrate along with the prolonging of time, and the problem of compounding compatibility is needed to be considered. That is, the existing UV visbreaking glue has defects, and it is important to provide a UV visbreaking glue which can improve the defects.
In view of the above, the present invention provides a UV vis-breaking composition comprising: 50-100 parts of acrylate pressure-sensitive adhesive containing carboxyl, 2-50 parts of multifunctional acrylate compound, 1-20 parts of auxiliary agent, 0.001-0.5 part of curing accelerator and 0.1-3 parts of photoinitiator; the auxiliary agent comprises an active group, wherein the active group comprises at least one of an epoxy group and an amino group. Therefore, the components are mutually supported and matched in function, so that the composition disclosed by the invention can achieve the effect of grafting double bonds to pressure-sensitive adhesive side chains in the curing process, thereby achieving the purposes of increasing the molecular weight and reducing the residual adhesive, and the mode also has the advantages of simple process, energy conservation, longer storage time and the like.
According to an embodiment of the present invention, in the multifunctional acrylate compound, the functional group corresponding to the functionality is a carbon-carbon double bond, and the functionality is 2 or more. Therefore, carbon-carbon double bonds in the multifunctional acrylate compound can be subjected to polymerization reaction through photo initiation to form a cross-linked network structure, so that the effect of viscosity reduction after UV irradiation can be achieved, and the residual gum is further reduced.
According to the embodiment of the invention, the acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 5-100 mgKOH/g.
Further, the multifunctional acrylate compound includes at least one of dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, and a di-or higher-functionality urethane acrylate polymer.
Further, the auxiliary agent comprises at least one of glycidyl acrylate and glycidyl methacrylate.
According to an embodiment of the present invention, the curing agent includes at least one of a metal ion curing agent, an aziridine-based curing agent, an isocyanate-based curing agent, an amine-based curing agent, and an epoxy-based curing agent.
According to an embodiment of the present invention, the curing accelerator includes at least one of triethylamine, benzyldimethylamine, pyridine, bicyclic amidines, N-diglycidylaniline, benzyltriphenylphosphonium bromide, triphenylphosphine, triphenylantimony, chromium acetylacetonate, tetraethylammonium bromide, 2,4, 6-tris (dimethylaminomethyl) phenol.
According to an embodiment of the present invention, the photoinitiator comprises at least one of 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-methylphenyl propane-1-one, 2-methyl-1- (4-methylthiophenyl) -2-morpholinyl-1-propanone, benzoin bis methyl ether, benzophenone, 2-isopropyl thioxanthone, 2,4,6- (trimethylbenzoyl) -diphenyl phosphine oxide, 2,4,6- (trimethylbenzoyl) -ethyl phosphonate.
The invention also provides the UV viscosity-reducing adhesive tape which comprises a base material layer, a UV viscosity-reducing adhesive layer and a release film layer which are arranged in a laminated mode, wherein the UV viscosity-reducing adhesive layer is formed by the UV viscosity-reducing composition. Thus, the UV detackifying adhesive tape has all the features and advantages of the UV detackifying composition described above, and thus will not be described herein again.
According to the embodiment of the invention, the material forming the substrate layer comprises at least one of PET, PO, PVC and EVA; the material forming the release film layer comprises PET.
The present invention also provides a method of making the UV detackifying adhesive tape described above, the method comprising: coating the UV viscosity-reducing composition on the substrate layer, drying after coating, and forming a UV viscosity-reducing adhesive layer on the surface of the substrate layer; and attaching a release film layer to the surface of the UV viscosity-reducing adhesive layer far away from one side of the substrate layer, and curing to obtain the UV viscosity-reducing adhesive tape. Thus, the method has all the features and advantages of the UV adhesive tape described above, and thus, the description thereof is omitted.
According to the embodiment of the invention, the drying temperature is 70-100 ℃, and the drying time is 2-3 minutes; the curing temperature is 25-60 ℃, and the curing time is 2-7 days.
Drawings
FIG. 1 is a schematic structural view of a UV visbreaking tape of the present invention;
FIG. 2 is a flow chart of a method of making a UV detackifying tape, in accordance with one embodiment of the present invention.
Description of the reference numerals
100-substrate layer, 200-UV visbreaking glue layer and 300-release film layer.
Detailed Description
Embodiments of the present application are described in detail below. The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the present disclosure. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents used are not indicated by the manufacturer, and are all conventional products commercially available.
To improve the above technical problems, the present invention provides a UV visbreaking composition comprising: 50-100 parts of acrylate pressure-sensitive adhesive containing carboxyl, 2-50 parts of multifunctional acrylate compound, 1-20 parts of auxiliary agent, 0.001-0.5 part of curing accelerator and 0.1-3 parts of photoinitiator; the auxiliary agent comprises an active group, wherein the active group comprises at least one of an epoxy group and an amino group. Therefore, in the curing process, the acrylate pressure-sensitive adhesive containing carboxyl can react with the auxiliary agent, namely the carboxyl in the pressure-sensitive adhesive can react with active groups in the auxiliary agent, under the action of the curing agent and the curing accelerator, the system forms the acrylate pressure-sensitive adhesive with a larger molecular weight and a double bond in a side chain, the molecular weight can be increased, and then a cross-linked structure is quickly formed through UV irradiation, so that quick viscosity reduction is realized, and the residual adhesive is reduced. In addition, the method has the advantages of simple process, energy conservation, long storage time and the like, and overcomes the defects of high energy consumption, more residual glue and the like in the existing scheme.
It should be noted that the components of the UV visbreaking composition are functionally supported and matched with each other, and that the better visbreaking and residual gum reducing effects can be achieved only when the content of each component is defined as the specific content.
Specifically, the content of the acrylate pressure-sensitive adhesive containing carboxyl is 50-100 parts by weight, the acrylate pressure-sensitive adhesive in the range can provide the main body of the viscosity-reducing adhesive layer, and the carboxyl contained in the acrylate pressure-sensitive adhesive is on a side chain of a long-chain structure of the acrylate pressure-sensitive adhesive and can react with other functional groups to achieve the purpose of grafting double bonds on the side chain. If the content of the pressure-sensitive adhesive is too low, the whole molecular weight of the visbreaking adhesive layer is small, the cohesive force is insufficient, and the residual adhesive is caused; if the content of the pressure-sensitive adhesive is too high, the double bond content of the whole viscosity-reducing adhesive layer is insufficient, and the peeling force after UV is larger.
The content of the multifunctional acrylate compound is 2 to 50 parts by weight, and the multifunctional acrylate compound in this range can provide sufficient carbon-carbon double bonds to perform the photo-curing reaction. If the content of the multifunctional acrylate compound is too low, the glass transition temperature of the whole viscosity reducing adhesive layer is low, and the peeling force after UV is large; if the content of the polyfunctional acrylate compound is too high, the viscosity-reducing agent layer tends to contain a large amount of small-molecular-weight substances, and the viscosity-reducing agent layer tends to have insufficient cohesive force, resulting in residual adhesive.
The content of the auxiliary agent is 1-20 parts by weight, the auxiliary agent contains active groups, and the auxiliary agent in the range can provide proper active groups to carry out grafting reaction with carboxyl in the pressure-sensitive adhesive, so that the effect of grafting carbon-carbon double bonds on side chains is achieved. If the content of the auxiliary agent is too low, carboxyl in the acrylate pressure-sensitive adhesive does not completely participate in the grafting reaction, and the peeling force after UV is large; if the content of the auxiliary is too high, an excessive amount of auxiliary small molecules exists in the glue layer, resulting in residual glue.
The content of the curing agent is 0.001-0.5 weight part, and the curing agent in the range can ensure that carboxyl which is not reacted with the auxiliary agent containing active groups in the pressure-sensitive adhesive can react with the curing agent, increase the cohesive force of the adhesive layer and control the stripping force. If the content of the curing agent is too low, the cohesive force of the adhesive layer is insufficient, and adhesive residue is easy to occur; if the content of the curing agent is too high, the whole adhesive layer is hard, and the peeling force before UV is too low to meet the use requirement.
The content of the curing accelerator is 0.001-0.5 weight part, and the curing accelerator within the range can properly increase the curing reaction progress, promote the grafting reaction and shorten the curing time. If the content of the curing accelerator is too low, the reaction time is longer, and the grafting rate is lower; if the content of the curing accelerator is too high, the reaction is too fast, the effective service time of the glue solution is short, the glue solution is not beneficial to coating, and the excessive curing accelerator can form micromolecule residues to cause glue residue.
The content of the photoinitiator is 0.1-3 parts by weight, and the photoinitiator in the range can initiate the system to perform photocuring reaction under proper illumination energy, so that the viscosity reducing effect is realized. If the content of the photoinitiator is too low, the initiation efficiency is too low, the photocuring reaction is insufficient, and the peeling force after UV is large; if the content of the photoinitiator is too high, an excessive amount of the photoinitiator may be caused to remain in the form of small molecules in the adhesive layer, resulting in adhesive residue.
According to an embodiment of the present invention, in the multifunctional acrylate compound, the functional group corresponding to the functionality is a carbon-carbon double bond, and the functionality is 2 or more. Therefore, the carbon-carbon double bond in the multifunctional acrylate compound can generate polymerization reaction through photo initiation, and after further polymerization, a network structure can be formed, so that the viscosity reducing effect is achieved. If the functionality is too low, the content of carbon-carbon double bonds is low, which may result in an insignificant decrease in peel strength and a poor reduction of residual gum after photocuring.
The polyfunctional acrylate compound may be a monomer or a polymer. Specifically, the polyfunctional acrylate compound may be a polyfunctional acrylate polymer or a polyfunctional acrylate monomer.
In the curing process, carboxyl in the pressure-sensitive adhesive can react with active groups in the auxiliary agent to graft double bonds on the side chain of the pressure-sensitive adhesive, so that the purposes of increasing molecular weight and reducing residual adhesive of the UV viscosity-reducing composition are achieved. The invention realizes crosslinking in the UV irradiation process, has simple process, saves energy and has longer storage time.
According to an embodiment of the present invention, the acid value of the acrylate pressure sensitive adhesive containing a carboxyl group is 5 to 100mgKOH/g, for example, 5mgKOH/g, 10mgKOH/g, 20mgKOH/g, 30mgKOH/g, 40mgKOH/g, 50mgKOH/g, 60mgKOH/g, 70mgKOH/g, 75mgKOH/g, 80mgKOH/g, 90mgKOH/g, 100 mgKOH/g. If the acid value is too low, the reactive active sites in the molecular chain are too few, so that the effects of increasing the molecular weight of the pressure-sensitive adhesive and reducing the residual adhesive after grafting cannot be achieved; if the acid value is too high, the storage property of the pressure-sensitive adhesive is impaired.
The acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 5-100mgKOH/g, which means that the acrylate pressure-sensitive adhesive containing carboxyl is titrated with a KOH alcohol solution, acid and alkali are used for neutralization, and the consumed KOH is 5-100mg KOH per gram of the acrylate pressure-sensitive adhesive containing carboxyl.
Optionally, the multifunctional acrylate compound comprises at least one of dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, and di-or higher functionality urethane acrylate polymers. The urethane acrylate polymer with more than two functionalities comprises: difunctional urethane acrylate polymers, trifunctional urethane acrylate polymers, tetrafunctional urethane acrylate polymers, pentafunctional urethane acrylate polymers, hexafunctional urethane acrylate polymers, heptafunctional urethane acrylate polymers, octafunctional urethane acrylate polymers, nonafunctional urethane acrylate polymers, and the like.
The auxiliary agent comprises at least one of glycidyl acrylate and glycidyl methacrylate.
According to an embodiment of the present invention, the curing agent includes at least one of a metal ion curing agent, an aziridine-based curing agent, an isocyanate-based curing agent, an amine-based curing agent, and an epoxy-based curing agent.
According to an embodiment of the present invention, the curing accelerator includes at least one of triethylamine, benzyldimethylamine, pyridine, dicyclamidine, N-diglycidylaniline, benzyltriphenylphosphonium bromide, triphenylphosphonium, triphenylantimony, chromium acetylacetonate, tetraethylammonium bromide, 2,4, 6-tris (dimethylaminomethyl) phenol.
According to an embodiment of the present invention, the photoinitiator comprises at least one of 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-methylphenyl propan-1-one, 2-methyl-1- (4-methylthiophenyl) -2-morpholinyl-1-propanone, benzoin bis methyl ether, benzophenone, 2-isopropyl thioxanthone, 2,4,6- (trimethylbenzoyl) -diphenyl phosphine oxide, 2,4,6- (trimethylbenzoyl) -phosphonic acid ethyl ester.
The invention also provides a UV anti-adhesive tape, which comprises a substrate layer 100, a UV anti-adhesive layer 200 and a release film layer 300 which are stacked, wherein the UV anti-adhesive layer 200 is formed by the UV anti-adhesive composition described above, with reference to fig. 1. Thus, the UV detackifying adhesive tape has all the features and advantages of the UV detackifying composition described above, and thus will not be described herein again. In general, the UV detackifying tape has less residual glue after UV irradiation, almost no residual glue, and also has an advantage of long storage time.
According to an embodiment of the present invention, a material forming the substrate layer 100 includes at least one of PET (polyethylene terephthalate), PO (polyolefin), PVC (polyvinyl chloride), EVA (ethylene-vinyl acetate copolymer).
The material forming the release film layer 300 includes PET.
In some embodiments of the invention, the thickness of the UV visbreaker layer 200 may be 15-25 μm, such as 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, 25 μm. From this, the UV visbreaking adhesive layer of above-mentioned thickness scope has high adhesion in the cutting, can carry out effectual fixed protection to materials such as glass cutting in-process, can guarantee that the goods does not drop, does not fly apart, collapses the bits of broken glass in the reduction cutting, and simultaneously, the thickness that UV visbreaking adhesive tape can also be guaranteed to the UV visbreaking adhesive layer of above-mentioned thickness scope is less, and manufacturing cost is lower.
The present invention also provides a method of making the UV visbreaking tape described above, with reference to fig. 2, comprising:
s100, coating the UV viscosity-reducing composition on a base material layer, and drying after coating to form a UV viscosity-reducing adhesive layer on the surface of the base material layer;
s200, attaching a release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing to obtain the UV viscosity-reducing adhesive tape.
In the UV vis-breaking composition, the acrylic pressure sensitive adhesive containing a carboxyl group contains a solvent, and thus the UV vis-breaking composition can be coated on the base material layer.
In some embodiments of the present invention, the UV viscosity-reducing composition may be mixed with a solvent to form a slurry, and then the slurry is coated on the substrate layer, and after the coating is completed, the substrate layer is dried to form a UV viscosity-reducing adhesive layer on the surface of the substrate layer. The defects of excessive viscosity and difficult coating of the UV viscosity-reducing composition can be overcome by adding the additional solvent, and the slurry can be more conveniently coated on the substrate layer. The present invention does not limit the kind of the solvent to be added, as long as the UV vis-breaking composition can be dissolved in the solvent to facilitate coating.
The coating method of the present invention is not limited, and coating may be performed using a knife coater, an extrusion coater, or a cast coater, for example.
In some embodiments of the present invention, in order to increase the adhesion between the substrate layer and the slurry, the surface of one side of the substrate layer may be subjected to corona treatment, and the slurry is coated on the corona surface of the substrate layer, so that the adhesion between the corona surface of the substrate layer and the slurry is better.
After the coating is finished, the solvent can be removed through drying treatment, specifically, the solvent contained in the acrylate pressure-sensitive adhesive containing carboxyl can be removed through drying treatment, and the solvent additionally added for coating convenience can also be removed. And forming a UV (ultraviolet) viscosity reducing adhesive layer after drying.
According to some embodiments of the invention, the temperature of the drying may be 70-100 ℃, such as 70 ℃, 75 ℃, 80 ℃, 85 ℃, 90 ℃, 95 ℃, 100 ℃, and the time of the drying may be 2-3 minutes, such as 2 minutes, 3 minutes.
S200, attaching a release film layer to the surface of the side, far away from the base material layer, of the UV viscosity-reducing adhesive layer, and curing to obtain the UV viscosity-reducing adhesive tape.
According to some embodiments of the invention, the surface of the UV anti-adhesive layer away from the substrate layer may be attached to the release surface of the release film layer.
According to some embodiments of the invention, the temperature of the curing is 25-60 ℃, such as 25 ℃, 30 ℃, 35 ℃, 40 ℃, 45 ℃, 50 ℃, 55 ℃, 60 ℃; the aging time is 2-7 days, such as 2 days, 3 days, 4 days, 5 days, 6 days or 7 days. For example, the mixture may be aged at 40 to 60 ℃ for 2 to 3 days, or at 25 ℃ for 7 days.
Through the curing step, the active functional groups can be reacted completely, so that the adhesive film can obtain better cohesive force. Specifically, double bonds can be grafted to a pressure-sensitive adhesive side chain in the curing process, so that the purposes of increasing molecular weight and reducing residual adhesive are achieved. In addition, the method for preparing the UV viscosity-reducing adhesive tape has the advantages of simple process and energy conservation, and the prepared UV viscosity-reducing adhesive tape has the advantage of long storage time.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
Example 1
A UV visbreaking composition comprising: acrylate pressure-sensitive adhesive containing carboxyl, polyfunctional acrylate compound, assistant, curing agent, curing accelerator and photoinitiator. The contents of the components are as follows:
the acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 20 mgKOH/g; the multifunctional acrylate compound is DPHA (dipentaerythritol hexaacrylate); the auxiliary agent contains an active group, and is glycidyl methacrylate; the curing agent is an epoxy curing agent; the curing accelerator is DMP-30; the photoinitiator is 1-hydroxycyclohexyl phenyl ketone.
The method for preparing the UV visbreaking adhesive tape comprises the following steps:
(1) the UV visbreaking composition is mixed with a solvent to prepare a slurry. Specifically, the acrylic ester pressure-sensitive adhesive containing carboxyl, the multifunctional acrylic ester compound, the auxiliary agent, the curing accelerator and the photoinitiator are mixed according to the proportion, the solvent is added, and the mixture is uniformly stirred at room temperature to obtain the slurry.
(2) Coating the slurry on the corona surface of the substrate layer, drying at 90 ℃ for 3min to form a UV (ultraviolet) viscosity reducing adhesive layer on the surface of the substrate layer, wherein the thickness of the UV viscosity reducing adhesive layer is 20 microns.
Wherein the material of the substrate layer is PET, and the thickness of the substrate layer is 50 μm.
(3) And (3) attaching the release surface of the release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing at the temperature of 60 ℃ for 3 days to obtain the UV viscosity-reducing adhesive tape.
Wherein the thickness of the release film layer is 25 μm, and the release force of the release film layer is 5 g.
Example 2
A UV visbreaking composition comprising: acrylate pressure-sensitive adhesive containing carboxyl, polyfunctional acrylate compound, assistant, curing agent, curing accelerator and photoinitiator. The contents of the components are as follows:
the acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 40 mgKOH/g; the multifunctional acrylate compound is a hexafunctional urethane acrylate polymer; the auxiliary agent contains an active group, and is glycidyl methacrylate; the curing agent is an epoxy curing agent; the curing accelerator is DMP-30; the photoinitiator is 2,4,6- (trimethylbenzoyl) -diphenyl phosphine oxide.
The method for preparing the UV visbreaking adhesive tape comprises the following steps:
(1) the UV visbreaking composition is mixed with a solvent to prepare a slurry. Specifically, the acrylic ester pressure-sensitive adhesive containing carboxyl, the multifunctional acrylic ester compound, the auxiliary agent, the curing accelerator and the photoinitiator are mixed according to the proportion, the solvent is added, and the mixture is uniformly stirred at room temperature to obtain the slurry.
(2) Coating the slurry on the corona surface of the substrate layer, drying at 100 ℃ for 2min to form a UV (ultraviolet) viscosity reducing adhesive layer on the surface of the substrate layer, wherein the thickness of the UV viscosity reducing adhesive layer is 20 microns.
Wherein the material of the substrate layer is PET, and the thickness of the substrate layer is 50 μm.
(3) And (3) attaching the release surface of the release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing at the temperature of 50 ℃ for 3 days to obtain the UV viscosity-reducing adhesive tape.
Wherein the thickness of the release film layer is 25 μm, and the release force of the release film layer is 5 g.
Example 3
A UV visbreaking composition comprising: acrylate pressure-sensitive adhesive containing carboxyl, polyfunctional acrylate compound, assistant, curing agent, curing accelerator and photoinitiator. The contents of the components are as follows:
the acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 100 mgKOH/g; the multifunctional acrylate compound is a 9-functionality polyurethane acrylate polymer; the auxiliary agent contains an active group, and is glycidyl methacrylate; the curing agent is an epoxy curing agent; the curing accelerator is DMP-30; the photoinitiator is 1-hydroxycyclohexyl phenyl ketone.
The method for preparing the UV visbreaking adhesive tape comprises the following steps:
(1) the UV visbreaking composition is mixed with a solvent to prepare a slurry. Specifically, the acrylate pressure-sensitive adhesive containing carboxyl, the multifunctional acrylate compound, the auxiliary agent, the curing accelerator and the photoinitiator are mixed according to the proportion, the solvent is added, and the mixture is uniformly stirred at room temperature to obtain the slurry.
(2) Coating the slurry on the corona surface of the substrate layer, drying at 90 ℃ for 3min to form a UV (ultraviolet) viscosity reducing adhesive layer on the surface of the substrate layer, wherein the thickness of the UV viscosity reducing adhesive layer is 20 microns.
Wherein the material of the substrate layer is PET, and the thickness of the substrate layer is 50 μm.
(3) And (3) attaching the release surface of the release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing for 3 days at 60 ℃ to obtain the UV viscosity-reducing adhesive tape.
Wherein the thickness of the release film layer is 25 μm, and the release force of the release film layer is 5 g.
Example 4
A UV visbreaking composition comprising: acrylate pressure-sensitive adhesive containing carboxyl, polyfunctional acrylate compound, assistant, curing agent, curing accelerator and photoinitiator. The contents of the components are as follows:
the acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 5 mgKOH/g; the multifunctional acrylate compound is a difunctional urethane acrylate polymer; the auxiliary agent contains an active group, and is glycidyl methacrylate; the curing agent is an epoxy curing agent; the curing accelerator is DMP-30; the photoinitiator is 1-hydroxycyclohexyl phenyl ketone.
The method for preparing the UV visbreaking adhesive tape comprises the following steps:
(1) and mixing the carboxyl-containing acrylate pressure-sensitive adhesive, the multifunctional acrylate compound, the auxiliary agent, the curing accelerator and the photoinitiator according to the proportion, and stirring uniformly at room temperature to obtain the slurry.
(2) Coating the sizing agent on the corona surface of the base material layer, drying at 90 ℃ for 3min to form a UV (ultraviolet) anti-adhesive layer on the surface of the base material layer, wherein the thickness of the UV anti-adhesive layer is 20 micrometers.
Wherein the material of the substrate layer is PET, and the thickness of the substrate layer is 50 μm.
(3) And (3) attaching the release surface of the release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing at the temperature of 60 ℃ for 3 days to obtain the UV viscosity-reducing adhesive tape.
Wherein the thickness of the release film layer is 25 μm, and the release force of the release film layer is 5 g.
Comparative example 1
A UV vis-breaking composition comprising: acrylate pressure-sensitive adhesive containing carboxyl, multifunctional acrylate compound, curing agent, curing accelerator and photoinitiator. The contents of the components are as follows:
the acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 20 mgKOH/g; the multifunctional acrylate compound is DPHA; the curing agent is epoxy curing agent; the curing accelerator is DMP-30; the photoinitiator is 1-hydroxycyclohexyl phenyl ketone. The UV vis-breaking composition of comparative example 1 contains no auxiliary agent.
The method for preparing the UV visbreaking adhesive tape comprises the following steps:
(1) the UV viscosity-reducing composition is mixed with a solvent to prepare a slurry. Specifically, the acrylate pressure-sensitive adhesive containing carboxyl, the multifunctional acrylate compound, the curing agent, the curing accelerator and the photoinitiator are mixed according to the proportion, the solvent is added, and the mixture is stirred uniformly at room temperature to obtain the slurry.
(2) Coating the slurry on the corona surface of the substrate layer, drying at 90 ℃ for 3min to form a UV (ultraviolet) viscosity reducing adhesive layer on the surface of the substrate layer, wherein the thickness of the UV viscosity reducing adhesive layer is 20 microns.
Wherein the material of the substrate layer is PET, and the thickness of the substrate layer is 50 μm.
(3) And (3) attaching the release surface of the release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing at the temperature of 60 ℃ for 3 days to obtain the UV viscosity-reducing adhesive tape.
Wherein the thickness of the release film layer is 25 μm, and the release force of the release film layer is 5 g.
Comparative example 2
A UV visbreaking composition comprising: acrylate pressure-sensitive adhesive containing carboxyl, polyfunctional acrylate compound, assistant, curing agent, curing accelerator and photoinitiator. The contents of the components are as follows:
the acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 20 mgKOH/g; the multifunctional acrylate compound is DPHA; the auxiliary agent contains an active group, and is glycidyl methacrylate; the curing agent is an epoxy curing agent; the curing accelerator is DMP-30; the photoinitiator is 1-hydroxycyclohexyl phenyl ketone.
The method for preparing the UV visbreaking adhesive tape comprises the following steps:
(1) the UV vis-breaking composition is mixed with a solvent to formulate a slurry. Specifically, the acrylate pressure-sensitive adhesive containing carboxyl, a multifunctional acrylate compound, an auxiliary agent, a curing accelerator and a photoinitiator are mixed according to the proportion, a solvent is added, and the mixture is stirred uniformly at room temperature to obtain the slurry.
(2) Coating the slurry on the corona surface of the substrate layer, drying at 90 ℃ for 3min to form a UV (ultraviolet) viscosity reducing adhesive layer on the surface of the substrate layer, wherein the thickness of the UV viscosity reducing adhesive layer is 20 microns.
Wherein the material of the substrate layer is PET, and the thickness of the substrate layer is 50 μm.
(3) And (3) attaching the release surface of the release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing at the temperature of 60 ℃ for 3 days to obtain the UV viscosity-reducing adhesive tape.
Wherein the thickness of the release film layer is 25 μm, and the release force of the release film layer is 5 g.
Comparative example 3
A UV visbreaking composition comprising: acrylate pressure-sensitive adhesive containing carboxyl, polyfunctional acrylate compound, assistant, curing agent, curing accelerator and photoinitiator. The contents of the components are as follows:
the acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 20 mgKOH/g; the multifunctional acrylate compound is DPHA; the auxiliary agent does not contain active groups, and is N-acryloyl morpholine; the curing agent is an epoxy curing agent; the curing accelerator is DMP-30; the photoinitiator is 1-hydroxycyclohexyl phenyl ketone.
The method for preparing the UV visbreaking adhesive tape comprises the following steps:
(1) the UV vis-breaking composition is mixed with a solvent to prepare a slurry. Specifically, the acrylate pressure-sensitive adhesive containing carboxyl, the multifunctional acrylate compound, the auxiliary agent, the curing accelerator and the photoinitiator are mixed according to the proportion, the solvent is added, and the mixture is uniformly stirred at room temperature to obtain the slurry.
(2) Coating the slurry on the corona surface of the substrate layer, drying at 90 ℃ for 3min to form a UV (ultraviolet) viscosity reducing adhesive layer on the surface of the substrate layer, wherein the thickness of the UV viscosity reducing adhesive layer is 20 microns.
Wherein the material of the substrate layer is PET, and the thickness of the substrate layer is 50 μm.
(3) And (3) attaching the release surface of the release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing at the temperature of 60 ℃ for 3 days to obtain the UV viscosity-reducing adhesive tape.
Wherein the thickness of the release film layer is 25 μm, and the release force of the release film layer is 5 g.
Comparative example 4
A UV visbreaking composition comprising: acrylate pressure-sensitive adhesive, polyfunctional acrylate compound, assistant, curing agent, curing accelerator and photoinitiator. The contents of the components are as follows:
the acrylate pressure-sensitive adhesive of comparative example 4, which contains no carboxyl group, had an acid value of 0 mgKOH/g; the multifunctional acrylate compound is a hexafunctional urethane acrylate polymer; the auxiliary agent contains an active group, and is glycidyl methacrylate; the curing agent is an epoxy curing agent; the curing accelerator is DMP-30; the photoinitiator is 2,4,6- (trimethylbenzoyl) -diphenyl phosphine oxide.
The method for preparing the UV visbreaking adhesive tape comprises the following steps:
(1) the UV vis-breaking composition is mixed with a solvent to prepare a slurry. Specifically, acrylate pressure-sensitive adhesive, a multifunctional acrylate compound, an auxiliary agent, a curing accelerator and a photoinitiator are mixed according to the proportion, a solvent is added, and the mixture is uniformly stirred at room temperature to obtain slurry.
(2) Coating the slurry on the corona surface of the substrate layer, drying at 100 ℃ for 2min to form a UV (ultraviolet) viscosity reducing adhesive layer on the surface of the substrate layer, wherein the thickness of the UV viscosity reducing adhesive layer is 20 microns.
Wherein the material of the substrate layer is PET, and the thickness of the substrate layer is 50 μm.
(3) And (3) attaching the release surface of the release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing at the temperature of 50 ℃ for 3 days to obtain the UV viscosity-reducing adhesive tape.
Wherein the thickness of the release film layer is 25 μm, and the release force of the release film layer is 5 g.
Comparative example 5
A UV visbreaking composition comprising: acrylate pressure-sensitive adhesive containing carboxyl, polyfunctional acrylate compound, assistant, curing agent, curing accelerator and photoinitiator. The contents of the components are as follows:
the acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 40 mgKOH/g; the multifunctional acrylate compound is a hexafunctional urethane acrylate polymer; the auxiliary agent contains an active group, and is glycidyl methacrylate; the curing agent is an epoxy curing agent; the curing accelerator is DMP-30; the photoinitiator is 2,4,6- (trimethylbenzoyl) -diphenyl phosphine oxide.
The method for preparing the UV visbreaking adhesive tape comprises the following steps:
(1) the UV vis-breaking composition is mixed with a solvent to prepare a slurry. Specifically, the acrylate pressure-sensitive adhesive containing carboxyl, the multifunctional acrylate compound, the auxiliary agent, the curing accelerator and the photoinitiator are mixed according to the proportion, the solvent is added, and the mixture is uniformly stirred at room temperature to obtain the slurry.
(2) Coating the slurry on the corona surface of the substrate layer, drying at 100 ℃ for 2min to form a UV (ultraviolet) viscosity reducing adhesive layer on the surface of the substrate layer, wherein the thickness of the UV viscosity reducing adhesive layer is 20 microns.
Wherein the material of the substrate layer is PET, and the thickness of the substrate layer is 50 μm.
(3) And (3) attaching the release surface of the release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing at the temperature of 50 ℃ for 3 days to obtain the UV viscosity-reducing adhesive tape.
Wherein the thickness of the release film layer is 25 μm, and the release force of the release film layer is 5 g.
Comparative example 6
A UV visbreaking composition comprising: acrylate pressure-sensitive adhesive containing carboxyl, polyfunctional acrylate compound, assistant, curing agent, curing accelerator and photoinitiator. The contents of the components are as follows:
the acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 40 mgKOH/g; the multifunctional acrylate compound is a hexafunctional urethane acrylate polymer; the auxiliary agent contains an active group, and is glycidyl methacrylate; the curing agent is an epoxy curing agent; the curing accelerator is DMP-30; the photoinitiator is 2,4,6- (trimethylbenzoyl) -diphenyl phosphine oxide.
The method for preparing the UV visbreaking adhesive tape comprises the following steps:
(1) the UV vis-breaking composition is mixed with a solvent to prepare a slurry. Specifically, the acrylate pressure-sensitive adhesive containing carboxyl, the multifunctional acrylate compound, the auxiliary agent, the curing accelerator and the photoinitiator are mixed according to the proportion, the solvent is added, and the mixture is uniformly stirred at room temperature to obtain the slurry.
(2) Coating the slurry on the corona surface of the substrate layer, drying at 100 ℃ for 2min to form a UV (ultraviolet) viscosity reducing adhesive layer on the surface of the substrate layer, wherein the thickness of the UV viscosity reducing adhesive layer is 20 microns.
Wherein the material of the substrate layer is PET, and the thickness of the substrate layer is 50 μm.
(3) And (3) attaching the release surface of the release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing at the temperature of 50 ℃ for 3 days to obtain the UV viscosity-reducing adhesive tape.
Wherein the thickness of the release film layer is 25 μm, and the release force of the release film layer is 5 g.
Comparative example 7
A UV visbreaking composition comprising: acrylate pressure-sensitive adhesive containing carboxyl, auxiliary agent, curing accelerator and photoinitiator. The contents of the components are as follows:
the acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 100 mgKOH/g; the auxiliary agent contains an active group, and is glycidyl methacrylate; the curing agent is an epoxy curing agent; the curing accelerator is DMP-30; the photoinitiator is 2,4,6- (trimethylbenzoyl) -diphenyl phosphine oxide. Comparative example 7 did not contain a polyfunctional acrylate compound.
The method for preparing the UV visbreaking adhesive tape comprises the following steps:
(1) the UV vis-breaking composition is mixed with a solvent to prepare a slurry. Specifically, the acrylate pressure-sensitive adhesive containing carboxyl, the auxiliary agent, the curing accelerator and the photoinitiator are mixed according to the proportion, the solvent is added, and the mixture is uniformly stirred at room temperature to obtain the slurry.
(2) Coating the slurry on the corona surface of the substrate layer, drying at 100 ℃ for 2min to form a UV (ultraviolet) viscosity reducing adhesive layer on the surface of the substrate layer, wherein the thickness of the UV viscosity reducing adhesive layer is 20 microns.
Wherein the material of the substrate layer is PET, and the thickness of the substrate layer is 50 μm.
(3) And (3) attaching the release surface of the release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing at the temperature of 50 ℃ for 3 days to obtain the UV viscosity-reducing adhesive tape.
Wherein the thickness of the release film layer is 25 μm, and the release force of the release film layer is 5 g.
Comparative example 8
A UV visbreaking composition comprising: acrylate pressure-sensitive adhesive containing carboxyl, polyfunctional acrylate compound, assistant, curing agent, curing accelerator and photoinitiator. The contents of the components are as follows:
the acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 100 mgKOH/g; the multifunctional acrylate compound is a 9-functionality polyurethane acrylate polymer; the auxiliary agent contains an active group, and is glycidyl methacrylate; the curing agent is an epoxy curing agent; the curing accelerator is DMP-30; the photoinitiator is 2,4,6- (trimethylbenzoyl) -diphenyl phosphine oxide.
The method for preparing the UV visbreaking adhesive tape comprises the following steps of:
(1) the UV vis-breaking composition is mixed with a solvent to formulate a slurry. Specifically, the acrylate pressure-sensitive adhesive containing carboxyl, the multifunctional acrylate compound, the auxiliary agent, the curing accelerator and the photoinitiator are mixed according to the proportion, the solvent is added, and the mixture is uniformly stirred at room temperature to obtain the slurry.
(2) Coating the slurry on the corona surface of the substrate layer, drying at 100 ℃ for 2min to form a UV (ultraviolet) viscosity reducing adhesive layer on the surface of the substrate layer, wherein the thickness of the UV viscosity reducing adhesive layer is 20 microns.
Wherein the material of the substrate layer is PET, and the thickness of the substrate layer is 50 μm.
(3) And (3) attaching the release surface of the release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing at the temperature of 50 ℃ for 3 days to obtain the UV viscosity-reducing adhesive tape.
Wherein the thickness of the release film layer is 25 μm, and the release force of the release film layer is 5 g.
Comparative example 9
A UV visbreaking composition comprising: acrylate pressure-sensitive adhesive containing carboxyl, polyfunctional acrylate compound, assistant, curing agent, curing accelerator and photoinitiator. The contents of the components are as follows:
the acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 5 mgKOH/g; the multifunctional acrylate compound is a difunctional urethane acrylate polymer; the auxiliary agent contains an active group, and is glycidyl methacrylate; the curing agent is epoxy curing agent; the curing accelerator is DMP-30; the photoinitiator is 2,4,6- (trimethylbenzoyl) -diphenyl phosphine oxide.
The method for preparing the UV visbreaking adhesive tape comprises the following steps:
(1) and (3) mixing the carboxyl-containing acrylate pressure-sensitive adhesive, the multifunctional acrylate compound, the auxiliary agent, the curing accelerator and the photoinitiator according to the proportion, and stirring uniformly at room temperature to obtain the slurry.
(2) Coating the sizing agent on the corona surface of the base material layer, drying at 100 ℃ for 2min to form a UV (ultraviolet) anti-adhesive layer on the surface of the base material layer, wherein the thickness of the UV anti-adhesive layer is 20 micrometers.
Wherein the material of the substrate layer is PET, and the thickness of the substrate layer is 50 μm.
(3) And (3) attaching the release surface of the release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing at the temperature of 50 ℃ for 3 days to obtain the UV viscosity-reducing adhesive tape.
Wherein the thickness of the release film layer is 25 μm, and the release force of the release film layer is 5 g.
Comparative example 10
A UV visbreaking composition comprising: acrylate pressure-sensitive adhesive containing carboxyl, polyfunctional acrylate compound, assistant, curing accelerator and photoinitiator. The contents of the components are as follows:
the acid value of the acrylate pressure-sensitive adhesive containing carboxyl is 5 mgKOH/g; the multifunctional acrylate compound is a difunctional urethane acrylate polymer; the auxiliary agent contains an active group, and is glycidyl methacrylate; the curing accelerator is DMP-30; the photoinitiator is 2,4,6- (trimethylbenzoyl) -diphenyl phosphine oxide.
The method for preparing the UV visbreaking adhesive tape comprises the following steps:
(1) and (3) mixing the carboxyl-containing acrylate pressure-sensitive adhesive, the multifunctional acrylate compound, the auxiliary agent, the curing accelerator and the photoinitiator according to the proportion, and stirring uniformly at room temperature to obtain the slurry.
(2) Coating the sizing agent on the corona surface of the base material layer, drying at 100 ℃ for 2min to form a UV (ultraviolet) anti-adhesive layer on the surface of the base material layer, wherein the thickness of the UV anti-adhesive layer is 20 micrometers.
Wherein the material of the substrate layer is PET, and the thickness of the substrate layer is 50 μm.
(3) And (3) attaching the release surface of the release film layer to the surface of the UV viscosity-reducing adhesive layer, which is far away from the substrate layer, and curing at the temperature of 50 ℃ for 3 days to obtain the UV viscosity-reducing adhesive tape.
Wherein the thickness of the release film layer is 25 μm, and the release force of the release film layer is 5 g.
In order to comparatively illustrate the properties of the UV tack-reducing tapes prepared in examples 1 to 4 and comparative examples 1 to 10, the prepared UV tack-reducing tapes were subjected to a property test.
The test method comprises the following steps: attaching a 25mm wide UV (ultraviolet) anti-adhesive tape on glass, specifically, removing a release film layer on the UV anti-adhesive tape, exposing a UV anti-adhesive layer outside, attaching the UV anti-adhesive layer on the glass, irradiating by UV light with the glass surface of the adhesive tape facing upwards, wherein the irradiation intensity of the UV light is 400mJ/cm2And then removing the UV adhesive-reducing tape adhered to the glass, and detecting the residual adhesive condition on the surface of the glass.
The test results are shown in table 1 below.
TABLE 1
As can be seen from Table 1, in comparative examples 1-10, no adhesive residue occurred, in examples 1-4, and the post-UV peel force was small, further illustrating when the UV detackifying composition comprises: 50-100 parts of acrylate pressure-sensitive adhesive containing carboxyl, 2-50 parts of multifunctional acrylate compound, 1-20 parts of auxiliary agent, 0.001-0.5 part of curing accelerator and 0.1-3 parts of photoinitiator, the problem of residual adhesive can be effectively avoided.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, reference to the description of the terms "one embodiment," "another embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A UV vis-breaking composition, wherein the UV vis-breaking composition comprises: 50-100 parts of acrylate pressure-sensitive adhesive containing carboxyl, 2-50 parts of multifunctional acrylate compound, 1-20 parts of auxiliary agent, 0.001-0.5 part of curing accelerator and 0.1-3 parts of photoinitiator;
the auxiliary agent comprises an active group, wherein the active group comprises at least one of an epoxy group and an amino group.
2. The UV vis-breaking composition of claim 1, wherein the functional group corresponding to the functionality in the multifunctional acrylate compound is a carbon-carbon double bond, and wherein the functionality is 2 or greater.
3. The UV vis-breaking composition according to claim 2, wherein the carboxyl group-containing acrylate pressure sensitive adhesive has an acid value of 5 to 100 mgKOH/g;
optionally, the multifunctional acrylate compound comprises at least one of dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, and di-or higher functionality urethane acrylate polymers;
the auxiliary agent comprises at least one of glycidyl acrylate and glycidyl methacrylate.
4. The UV vis-breaking composition of claim 1, wherein the curing agent comprises at least one of a metal ion curing agent, an aziridine curing agent, an isocyanate curing agent, an amine curing agent, and an epoxy curing agent.
5. The UV vis-breaking composition of claim 1, wherein the cure accelerator comprises at least one of triethylamine, benzyldimethylamine, pyridine, dicycloamidine, N-diglycidylaniline, benzyltriphenylphosphonium bromide, triphenylphosphine, triphenylantimony, chromium acetylacetonate, tetraethylammonium bromide, 2,4, 6-tris (dimethylaminomethyl) phenol.
6. The UV vis-breaking composition of claim 1, wherein the photoinitiator comprises at least one of 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-methylphenyl propane-1-one, 2-methyl-1- (4-methylthiophenyl) -2-morpholinyl-1-propanone, benzoin bis methyl ether, benzophenone, 2-isopropyl thioxanthone, 2,4,6- (trimethylbenzoyl) -diphenylphosphine oxide, and ethyl 2,4,6- (trimethylbenzoyl) -phosphonate.
7. A UV adhesive tape comprising a substrate layer, a UV adhesive reducing layer and a release film layer which are laminated, wherein the UV adhesive reducing layer is formed by the UV adhesive reducing composition of any one of claims 1 to 6.
8. The UV adhesive reduction tape according to claim 7, wherein the material forming the substrate layer comprises at least one of PET, PO, PVC, EVA;
the material for forming the release film layer comprises PET.
9. A method of making the UV visbreaking tape of any one of claims 7-8, comprising:
coating the UV viscosity-reducing composition on the substrate layer, drying after coating, and forming a UV viscosity-reducing adhesive layer on the surface of the substrate layer;
and attaching a release film layer to the surface of the UV viscosity-reducing adhesive layer far away from one side of the substrate layer, and curing to obtain the UV viscosity-reducing adhesive tape.
10. The method according to claim 9, wherein the temperature of the drying is 70-100 ℃, and the time of the drying is 2-3 minutes;
the curing temperature is 25-60 ℃, and the curing time is 2-7 days.
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| CN115746757A (en) * | 2022-11-24 | 2023-03-07 | 威士达半导体科技(张家港)有限公司 | UV (ultraviolet) adhesive reducing agent and preparation method thereof, UV adhesive reducing tape and preparation method thereof |
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| CN114196354A (en) * | 2021-12-20 | 2022-03-18 | 苏州赛伍应用技术股份有限公司 | Carboxyl-containing viscose reducing composition and preparation method and application thereof |
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| CN110093115A (en) * | 2018-01-31 | 2019-08-06 | 东莞市澳中电子材料有限公司 | A kind of UV visbreaking protective film and preparation method thereof for lithium battery packaging |
| CN108276923A (en) * | 2018-02-02 | 2018-07-13 | 苏州城邦达力材料科技有限公司 | A kind of UV visbreakings composition, UV visbreaking films and preparation method thereof |
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| CN115141585A (en) * | 2022-07-06 | 2022-10-04 | 世晨材料技术(上海)有限公司 | UV-moisture dual-curing composition and adhesive film and adhesive tape containing same |
| CN115141585B (en) * | 2022-07-06 | 2024-02-27 | 世晨材料技术(上海)有限公司 | UV-moisture dual-curing composition and adhesive film and adhesive tape containing same |
| CN115746757A (en) * | 2022-11-24 | 2023-03-07 | 威士达半导体科技(张家港)有限公司 | UV (ultraviolet) adhesive reducing agent and preparation method thereof, UV adhesive reducing tape and preparation method thereof |
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