CN114836143A - High-temperature-resistant UV (ultraviolet) strippable pressure-sensitive adhesive film and preparation method thereof - Google Patents
High-temperature-resistant UV (ultraviolet) strippable pressure-sensitive adhesive film and preparation method thereof Download PDFInfo
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- CN114836143A CN114836143A CN202210615003.0A CN202210615003A CN114836143A CN 114836143 A CN114836143 A CN 114836143A CN 202210615003 A CN202210615003 A CN 202210615003A CN 114836143 A CN114836143 A CN 114836143A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 57
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- OIWOHHBRDFKZNC-UHFFFAOYSA-N cyclohexyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1CCCCC1 OIWOHHBRDFKZNC-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003960 organic solvent Substances 0.000 claims abstract description 21
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims abstract description 18
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- 239000011976 maleic acid Substances 0.000 claims abstract description 18
- 229940098465 tincture Drugs 0.000 claims abstract description 18
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims abstract description 18
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- 230000000181 anti-adherent effect Effects 0.000 claims abstract description 13
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- 239000011248 coating agent Substances 0.000 claims description 53
- 238000000576 coating method Methods 0.000 claims description 53
- 239000010410 layer Substances 0.000 claims description 32
- 238000005303 weighing Methods 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 25
- 239000011259 mixed solution Substances 0.000 claims description 24
- 238000002156 mixing Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 24
- 239000002904 solvent Substances 0.000 claims description 23
- 239000000853 adhesive Substances 0.000 claims description 20
- 230000001070 adhesive effect Effects 0.000 claims description 20
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 17
- 229920002799 BoPET Polymers 0.000 claims description 16
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical group N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 14
- 239000003431 cross linking reagent Substances 0.000 claims description 14
- 239000003112 inhibitor Substances 0.000 claims description 14
- 230000003712 anti-aging effect Effects 0.000 claims description 11
- 239000003963 antioxidant agent Substances 0.000 claims description 11
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- 238000001035 drying Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
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- 230000007704 transition Effects 0.000 claims description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 8
- 239000011247 coating layer Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 5
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 4
- JTHZUSWLNCPZLX-UHFFFAOYSA-N 6-fluoro-3-methyl-2h-indazole Chemical compound FC1=CC=C2C(C)=NNC2=C1 JTHZUSWLNCPZLX-UHFFFAOYSA-N 0.000 claims description 3
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- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 5
- WURBFLDFSFBTLW-UHFFFAOYSA-N benzil Chemical class C=1C=CC=CC=1C(=O)C(=O)C1=CC=CC=C1 WURBFLDFSFBTLW-UHFFFAOYSA-N 0.000 description 5
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- 150000002513 isocyanates Chemical class 0.000 description 4
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
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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
- 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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
-
- 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]
-
- 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
-
- 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
- C09J2475/00—Presence of polyurethane
- C09J2475/003—Presence of polyurethane in the primer coating
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention provides a high-temperature-resistant UV (ultraviolet) strippable pressure-sensitive adhesive film, which comprises a high-temperature-resistant UV anti-adhesive layer; the high-temperature-resistant pressure-sensitive adhesive comprises 55-81% of high-temperature-resistant pressure-sensitive adhesive, wherein the high-temperature-resistant pressure-sensitive adhesive comprises the following raw materials: 18-22% of 2-ethylhexyl acrylate, 10-15% of octadecyl acrylate, 0.2-1.1% of maleic acid tincture, 0.05-0.8% of cyclohexyl methacrylate, 0.8-1.3% of 2-acetaminoacrylic acid, 0.2-0.7% of a reaction initiator and the balance of an organic solvent; 20-35% of a photosensitive multifunctional oligomer; 0.2-0.7% of curing agent; and 0.2-0.6% of photoinitiator. The invention also provides a preparation method of the high-temperature-resistant UV-strippable pressure-sensitive adhesive film, a protective film and a preparation method thereof. The high-temperature resistant UV strippable pressure-sensitive adhesive film overcomes the defect of storage time at a high temperature state in the prior art, and can reduce the stripping strength under UV irradiation.
Description
Technical Field
The invention relates to the technical field of adhesives, in particular to a high-temperature-resistant UV (ultraviolet) strippable pressure-sensitive adhesive film and a preparation method thereof.
Background
The visbreaking protective film is divided into a thermal visbreaking protective film and a UV visbreaking protective film, and most of the visbreaking protective films are UV visbreaking protective films in the current market. The UV anti-adhesive protective film generally uses a P0 film as a substrate, and also uses a PET film as a substrate, and is commonly used for protection of a wafer cutting process and a later picking process, and has a tendency of transferring to protection of a high-performance tempered glass process (such as mobile phone glass) and laser engraving process protection of a metal back cover of a mobile phone. Most of the UV viscosity reducing adhesives for wafer cutting and picking process protection in domestic markets are mainly applied to Japan and Taiwan China, and several domestic UV viscosity reducing adhesives are researched, developed and popularized, and the performance is not completely stable.
There are two common processing methods in cutting or thinning a semiconductor wafer: 1. the method comprises the steps of covering a high-viscosity protective film on the surface of a wafer under a heating condition, cutting, freezing, taking down a chip, and finally cleaning the chip. However, during the dicing process, since the local temperature is relatively high, the adhesive layer of the protective film usually falls off on the surface of the wafer, and a large amount of solvent is required for cleaning, and some solvents may damage the wafer and cause environmental pollution. 2. The UV anti-sticking protective film is used, the initial stripping force is high, after the wafer is attached and processed, the stripping force is reduced rapidly through UV irradiation, and the wafer finished product can be taken down from the protective film conveniently. However, the initial peeling force is large, which may cause the protective film to be stretched and deformed due to the excessive unwinding force during the unwinding process, thereby affecting the subsequent use. The common base material of the existing UV visbreaking protective film is a PE/PO film, and the compatibility of the existing UV visbreaking protective film to the technology of the change of the day and the month is not high due to poor strength and temperature resistance.
The common processing method in the process of thinning or cutting the semiconductor wafer mainly comprises the step of fixing the wafer by using a UV (ultraviolet) anti-adhesive protective film to perform thinning and cutting processes, wherein the initial stripping force of the protective film is high, and after the wafer is attached to the protective film for processing, the stripping force is reduced sharply through UV irradiation, so that the finished wafer product can be taken down from the protective film conveniently. However, in the production process, due to the high-speed friction and the characteristics of the polymer material, charges are easily concentrated on the non-conductive protective film, and a high peeling voltage is generated at the moment of tearing the protective film, so that the risk of breaking down the semiconductor wafer is generated.
Therefore, the present invention is directed to a high temperature resistant UV peelable pressure sensitive adhesive film and a method for preparing the same, so as to solve the problems mentioned in the background art.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a high-temperature resistant UV strippable pressure-sensitive adhesive film, which comprises a base film and a high-temperature resistant UV anti-adhesive layer; the high-temperature UV visbreaking layer comprises the following raw materials in percentage by mass:
55-81% of high-temperature-resistant pressure-sensitive adhesive, wherein the high-temperature-resistant pressure-sensitive adhesive comprises the following raw materials in percentage by mass:
18-22% of 2-ethylhexyl acrylate, 10-15% of octadecyl acrylate, 0.2-1.1% of maleic acid tincture, 0.05-0.8% of cyclohexyl methacrylate, 0.8-1.3% of 2-acetaminoacrylic acid, 0.2-0.7% of a reaction initiator and the balance of an organic solvent;
20-35% of a photosensitive multifunctional oligomer;
0.2-0.7% of curing agent; and 0.2-0.6% of photoinitiator.
Preferably, the high-temperature resistant UV visbreaking layer further comprises the following raw materials in percentage by mass:
0.05-0.1% of a plasticizer;
0.05-0.2% of antioxidant; and 0.1-0.5% of anti-aging agent.
Preferably, the organic solvent is at least one of ethyl acetate or butyl acetate.
Preferably, the base film is a PET base coating film, and the PET base coating film comprises a PET film and a transition coating arranged on the PET film.
Preferably, the transition coating comprises the following raw materials in percentage by mass:
20-31% of acrylate; 0.6-1.2% of a cross-linking agent; 0.3-0.7% of a catalyst; 3-5% of an inhibitor; the balance of ethyl acetate.
Preferably, the reaction initiator is azobisisobutyronitrile.
Preferably, the curing agent is a polyisocyanate curing agent.
The second purpose of the invention is to provide a preparation method of the high-temperature resistant UV strippable pressure-sensitive adhesive film, which comprises the following steps:
step 101: weighing 35-52% of reaction initiator and organic solvent, and mixing to obtain mixed solution;
step 102: respectively weighing 35-52% of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and 50-65% of maleic acid tincture, mixing with the mixed solution, putting into a reaction kettle, heating to 75 ℃, reacting for 2.5-3.5 hours, and keeping the temperature at 90 ℃ for 4 hours to obtain a prepolymer;
step 103: adding the rest of the mixture of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and cyclohexyl methacrylate into the prepolymer in the step 102, simultaneously adding the rest of the mixed solution in the step 101, reacting at the temperature of 80-90 ℃, and continuing to preserve heat for 1-2 hours after the dropwise addition is finished; dropwise adding the rest of reaction initiator within 1-2 hours under the condition of 85-95 ℃, and after dropwise adding, continuing to keep the temperature for 1.5-2.5 hours to finish the reaction; adding an adjusting solvent into the product obtained by the reaction to adjust the viscosity to be 150-500KPa.s and the solid content to be 25-35 percent, thus obtaining the high-temperature-resistant pressure-sensitive adhesive;
step 104: weighing the high-temperature-resistant pressure-sensitive adhesive, the photosensitive polyfunctional oligomer, the curing agent and the photoinitiator according to the proportion, and mixing to prepare the UV visbreaking adhesive;
step 105: preparing a base film which is well coated, uniformly coating the UV visbreaking adhesive on the base film to form a coating with the thickness of 10-20 mu m, heating and drying at 110 ℃, and forming the high-temperature resistant UV visbreaking layer on the base film to obtain the high-temperature resistant UV peelable pressure-sensitive adhesive film.
Preferably, the step 103 is to add a plasticizer, an antioxidant and an anti-aging agent in a ratio.
Preferably, in step 103, a mixture of 2-ethylhexyl acrylate, stearyl acrylate, 2-acetaminoacrylic acid and cyclohexyl methacrylate in a proportional amount is uniformly dropped into the prepolymer.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a high-temperature-resistant UV (ultraviolet) strippable pressure-sensitive adhesive film, which comprises a high-temperature-resistant UV anti-adhesive layer; the high-temperature-resistant pressure-sensitive adhesive comprises 55-81% of high-temperature-resistant pressure-sensitive adhesive, wherein the high-temperature-resistant pressure-sensitive adhesive comprises the following raw materials: 18-22% of 2-ethylhexyl acrylate, 10-15% of octadecyl acrylate, 0.2-1.1% of maleic acid tincture, 0.05-0.8% of cyclohexyl methacrylate, 0.8-1.3% of 2-acetaminoacrylic acid, 0.2-0.7% of a reaction initiator and the balance of an organic solvent; 20-35% of a photosensitive multifunctional oligomer; 0.2-0.7% of curing agent; and 0.2-0.6% of photoinitiator. The invention also provides a preparation method of the high-temperature-resistant UV-strippable pressure-sensitive adhesive film, a protective film and a preparation method thereof. The high-temperature resistant UV strippable pressure-sensitive adhesive film overcomes the defect of storage time at a high temperature state in the prior art, and can reduce the stripping strength under UV irradiation.
The foregoing description is only an overview of the technical solutions of the present invention, and some embodiments are described in detail below in order to make the technical solutions of the present invention more clearly understood and to implement the technical solutions according to the content of the description. Specific embodiments of the present invention are given in detail by the following examples.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a high temperature resistant UV peelable pressure-sensitive adhesive film of the invention:
the adhesive comprises 1-high temperature resistant UV strippable pressure-sensitive adhesive film, 11-high temperature resistant UV anti-adhesive layer, 12-transition coating and 13-PET film.
Detailed Description
The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, which will enable those skilled in the art to practice the present invention with reference to the accompanying specification. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are used based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, and "depth" corresponds to the dimension from front to back. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
A high temperature resistant UV strippable pressure-sensitive adhesive film 1 comprises a base film and a high temperature resistant UV visbreaking layer 11; the high-temperature UV visbreaking layer comprises the following raw materials in percentage by mass:
55-81% of high-temperature-resistant pressure-sensitive adhesive, which comprises the following raw materials in percentage by mass:
18-22% of 2-ethylhexyl acrylate, 10-15% of octadecyl acrylate, 0.2-1.1% of maleic acid tincture, 0.05-0.8% of cyclohexyl methacrylate, 0.8-1.3% of 2-acetaminoacrylic acid, 0.2-0.7% of a reaction initiator and the balance of an organic solvent;
20-35% of a photosensitive multifunctional oligomer;
0.2-0.7% of curing agent; and 0.2-0.6% of photoinitiator.
The high-temperature-resistant UV-strippable pressure-sensitive adhesive film has excellent heat resistance and can be stored at a high temperature of 80 ℃ for 2 hours.
In some embodiments, the high temperature resistant UV anti-adhesive layer further comprises the following raw materials in percentage by mass:
0.05-0.1% of a plasticizer;
0.05-0.2% of antioxidant; and 0.1-0.5% of anti-aging agent. The comprehensive performance of the high-temperature resistant UV anti-adhesion layer is enhanced by adding the substances into the high-temperature resistant UV anti-adhesion layer.
In some embodiments, the organic solvent is at least one of ethyl acetate or butyl acetate to ensure solubility of different substances in the high temperature resistant pressure sensitive adhesive.
In some embodiments, the base film is a PET primed film comprising a PET film 13 and a transitional coating 12 disposed on the PET film. A large amount of tiny potholes are formed on the surface of the PET film after the bottom coating film is solidified, and after the high-temperature resistant UV anti-adhesion layer is coated, glue can have good adhesion on the PET film, and even if the glue is torn off before and after UV, the glue cannot degum.
In some embodiments, the transition coating comprises the following raw materials in mass percent:
20-31% of acrylate; 0.6-1.2% of a cross-linking agent; 0.3-0.7% of a catalyst; 3-5% of an inhibitor; the balance of ethyl acetate.
The reaction initiator may be a reaction initiator commonly used in the art. In some embodiments, the reaction initiator is azobisisobutyronitrile, which may be used as a reaction initiator to increase the reaction efficiency.
The curing agent may be one commonly used in the art. In some embodiments, the curing agent is a polyisocyanate curing agent to enhance curing efficiency.
The invention also relates to a preparation method of the high-temperature resistant UV strippable pressure-sensitive adhesive film, which comprises the following steps:
step 101: weighing 35-52% of reaction initiator and organic solvent, and mixing to obtain mixed solution;
step 102: respectively weighing 35-52% of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and 50-65% of maleic acid tincture, mixing the mixture with the mixed solution, putting the mixture into a reaction kettle, heating to 75 ℃, reacting for 2.5-3.5 hours, and preserving heat at 90 ℃ for 4 hours to obtain a prepolymer;
step 103: adding the rest of the mixture of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and cyclohexyl methacrylate into the prepolymer in the step 102, simultaneously adding the rest of the mixed solution in the step 101, reacting at the temperature of 80-90 ℃, and continuing to preserve heat for 1-2 hours after the dropwise addition is finished; dropwise adding the rest of reaction initiator within 1-2 hours under the condition of 85-95 ℃, and after dropwise adding, continuing to keep the temperature for 1.5-2.5 hours to finish the reaction; adding an adjusting solvent into the product obtained by the reaction to adjust the viscosity to be 150-500KPa.s and the solid content to be 25-35 percent, thus obtaining the high-temperature-resistant pressure-sensitive adhesive;
in some embodiments, the conditioning solvent comprises the following raw materials in mass percent: 40-60% of ethyl acetate and
butyl acetate of (a).
Step 104: weighing the high-temperature-resistant pressure-sensitive adhesive, the photosensitive polyfunctional oligomer, the curing agent and the photoinitiator according to the proportion, and mixing to prepare the UV visbreaking adhesive;
step 105: preparing a base film which is well coated with prime coat, uniformly coating a UV (ultraviolet) anti-adhesion adhesive on the base film to form a coating with the thickness of 10-20 mu m, heating and drying at 110 ℃, and forming a high-temperature resistant UV anti-adhesion layer on the base film to prepare the high-temperature resistant UV strippable pressure-sensitive adhesive film.
In some embodiments, the step 103 includes adding a plasticizer, an antioxidant, and an anti-aging agent to the high temperature pressure sensitive adhesive in a ratio.
In some embodiments, in step 103, a mixture of 2-ethylhexyl acrylate, stearyl acrylate, 2-acetaminoacrylic acid, and cyclohexyl methacrylate is added dropwise to the prepolymer at a constant rate to ensure that the reactants react sufficiently.
In some embodiments, the step 105 of heating to 110 deg.C for drying comprises crosslinking and curing at 110 deg.C for 2-5 min, aging at 40-60 deg.C for 1-3 days, and cooling for 48 h; the drying efficiency is improved by the heating drying method.
In some embodiments, the base film is a PET primed film, and the method of making the PET primed film comprises the steps of:
weighing the solvent according to the proportion, adding the solvent into the polyurethane resin, and stirring for 15 minutes at the stirring speed of 650-800 r/min; adding the cross-linking agent, the anti-blocking agent and the inhibitor in proportion and continuously stirring for 15 minutes; after stirring, adding ethyl acetate in a proportional amount for dilution to prepare a coating liquid;
coating the coating liquid on a PET film to form a coating layer with the thickness of 0.3-0.6 mu m; heating to 65 ℃ and curing for 32 s; forming a primer layer; and cooling to room temperature to obtain the PET priming coat.
Example one
A high-temperature resistant UV strippable pressure-sensitive adhesive film comprises a base film and a high-temperature resistant UV anti-adhesive layer; the high-temperature UV visbreaking layer comprises the following raw materials in percentage by mass:
60% of high-temperature-resistant pressure-sensitive adhesive, which comprises the following raw materials in percentage by mass:
21 percent of acrylic acid-2-ethylhexyl ester, 12 percent of octadecyl acrylate, 0.6 percent of maleic acid tincture, 0.2 percent of cyclohexyl methacrylate, 1.1 percent of 2-acetamidoacrylic acid and 0.5 percent of reaction initiator namely azobisisobutyronitrile, and the balance of organic solvent ethyl acetate;
29% of a photosensitive multifunctional oligomer;
0.6 percent of curing agent, namely a polybasic isocyanate curing agent; and 0.5% of a photoinitiator, i.e. a benzil derivative.
The high-temperature resistant UV visbreaking layer also comprises the following raw materials in percentage by mass:
0.3% of a plasticizer, i.e. a phthalic acid derivative;
0.1% of antioxidant 2, 6-di-tert-butyl-p-cresol; and 0.3% of an anti-aging agent, i.e., a peroxide decomposer.
The transition coating comprises the following raw materials in percentage by mass:
25% of acrylate; 1.1% of a cross-linking agent; 0.5% of a catalyst; 5% of an inhibitor; the balance of ethyl acetate.
A preparation method of a high-temperature-resistant UV-strippable pressure-sensitive adhesive film comprises the following steps:
step 101: weighing 40% of reaction initiator and organic solvent, and mixing to obtain mixed solution;
step 102: respectively weighing 40 percent of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and 60 percent of maleic acid tincture, mixing the mixture with the mixed solution, putting the mixture into a reaction kettle, heating to 75 ℃, reacting for 3 hours, and keeping the temperature at 90 ℃ for 4 hours to obtain a prepolymer;
step 103: adding the rest of the mixture of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and cyclohexyl methacrylate in proportion into the prepolymer in the step 102 at a constant speed, simultaneously adding the rest of the mixed solution in the step 101, reacting at the temperature of 90 ℃, and continuing to preserve heat for 2 hours after the dropwise addition is finished; dropwise adding the rest of reaction initiator within 2 hours under the condition of 90 ℃, and after dropwise adding, continuously preserving the heat for 2 hours and finishing the reaction; adding an adjusting solvent into a product obtained by the reaction to adjust the viscosity of the product to be 400KPa.s and the solid content of the product to be 30 percent, and preparing the high-temperature-resistant pressure-sensitive adhesive;
step 104: weighing the high-temperature-resistant pressure-sensitive adhesive, the photosensitive polyfunctional oligomer, the curing agent and the photoinitiator according to the proportion, and mixing to prepare the UV visbreaking adhesive;
step 105: preparing a base film which is well coated, uniformly coating the UV visbreaking adhesive on the base film to form a coating with the thickness of 20 mu m, heating and drying at 110 ℃, and forming the high-temperature resistant UV visbreaking layer on the base film to prepare the high-temperature resistant UV peelable pressure-sensitive adhesive film.
The preparation method of the PET priming coating comprises the following steps:
weighing a solvent according to a proportion, adding the solvent into polyurethane resin, and stirring for 15 minutes at a stirring speed of 800 r/min; adding the cross-linking agent, the anti-blocking agent and the inhibitor in proportion and continuously stirring for 15 minutes; after stirring, adding ethyl acetate in a proportional amount for dilution to prepare a coating liquid;
coating the coating liquid on a PET film to form a coating layer with the thickness of 0.6 mu m; heating to 65 ℃ and curing for 32 s; forming a primer layer; and cooling to room temperature to obtain the PET priming coat.
Example two
A high-temperature resistant UV strippable pressure-sensitive adhesive film comprises a base film and a high-temperature resistant UV anti-adhesive layer; the high-temperature UV visbreaking layer comprises the following raw materials in percentage by mass:
60% of high-temperature-resistant pressure-sensitive adhesive, which comprises the following raw materials in percentage by mass:
21 percent of 2-ethylhexyl acrylate, 12 percent of octadecyl acrylate, 0.6 percent of maleic acid tincture, 0.2 percent of cyclohexyl methacrylate, 1.1 percent of 2-acetaminoacrylic acid and 0.5 percent of reaction initiator namely azobisisobutyronitrile, and the balance of a mixture of organic solvents of ethyl acetate and butyl acetate;
29% of a photosensitive multifunctional oligomer;
0.6 percent of curing agent, namely a polybasic isocyanate curing agent; and 0.5% of a photoinitiator, i.e. a benzil derivative.
The high-temperature resistant UV visbreaking layer also comprises the following raw materials in percentage by mass:
0.3% of a plasticizer, i.e. a phthalic acid derivative;
0.1% of antioxidant 2, 6-di-tert-butyl-p-cresol; and 0.3% of an anti-aging agent, i.e., a peroxide decomposer.
The transition coating comprises the following raw materials in percentage by mass:
25% of acrylate; 1.1% of a cross-linking agent; 0.5% of a catalyst; 5% of an inhibitor; the balance of ethyl acetate.
A preparation method of a high-temperature-resistant UV-strippable pressure-sensitive adhesive film comprises the following steps:
step 101: weighing 40% of reaction initiator and organic solvent, and mixing to obtain mixed solution;
step 102: respectively weighing 40 percent of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and 60 percent of maleic acid tincture, mixing the mixture with the mixed solution, putting the mixture into a reaction kettle, heating to 75 ℃, reacting for 3 hours, and keeping the temperature at 90 ℃ for 4 hours to obtain a prepolymer;
step 103: adding the rest of the mixture of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and cyclohexyl methacrylate in proportion into the prepolymer in the step 102 at a constant speed, simultaneously adding the rest of the mixed solution in the step 101, reacting at the temperature of 90 ℃, and continuing to preserve heat for 2 hours after the dropwise addition is finished; dropwise adding the rest of reaction initiator within 2 hours under the condition of 90 ℃, and after dropwise adding, continuously preserving the heat for 2 hours and finishing the reaction; adding an adjusting solvent into a product obtained by the reaction to adjust the viscosity of the product to be 400KPa.s and the solid content of the product to be 30 percent, and preparing the high-temperature-resistant pressure-sensitive adhesive;
step 104: weighing the high-temperature-resistant pressure-sensitive adhesive, the photosensitive polyfunctional oligomer, the curing agent and the photoinitiator according to the proportion, and mixing to prepare the UV visbreaking adhesive;
step 105: preparing a base film which is well coated, uniformly coating the UV visbreaking adhesive on the base film to form a coating with the thickness of 20 mu m, heating and drying at 110 ℃, and forming the high-temperature resistant UV visbreaking layer on the base film to prepare the high-temperature resistant UV peelable pressure-sensitive adhesive film.
The preparation method of the PET priming coating comprises the following steps:
weighing a solvent according to a proportion, adding the solvent into polyurethane resin, and stirring for 15 minutes at a stirring speed of 800 r/min; adding the cross-linking agent, the anti-blocking agent and the inhibitor in proportion and continuously stirring for 15 minutes; after stirring, adding ethyl acetate in a proportional amount for dilution to prepare a coating liquid;
coating the coating liquid on a PET film to form a coating layer with the thickness of 0.6 mu m; heating to 65 ℃ and curing for 32 s; forming a primer layer; and cooling to room temperature to obtain the PET priming coat.
Comparative example 1
A high-temperature resistant UV strippable pressure-sensitive adhesive film comprises a base film and a high-temperature resistant UV anti-adhesive layer; the high-temperature UV visbreaking layer comprises the following raw materials in percentage by mass:
60% of high-temperature-resistant pressure-sensitive adhesive, which comprises the following raw materials in percentage by mass:
21 percent of 2-ethylhexyl acrylate, 12 percent of octadecyl acrylate, 0.6 percent of maleic acid tincture, 0.2 percent of cyclohexyl methacrylate, 1.1 percent of 2-acetaminoacrylic acid and 0.5 percent of reaction initiator namely triethylamine, and the balance of organic solvent ethyl acetate;
29% of a photosensitive multifunctional oligomer;
0.6 percent of curing agent, namely a polybasic isocyanate curing agent; and 0.5% of a photoinitiator, i.e. a benzil derivative.
The high-temperature resistant UV visbreaking layer also comprises the following raw materials in percentage by mass:
0.3% of a plasticizer, i.e. a phthalic acid derivative;
0.1% of antioxidant 2, 6-di-tert-butyl-p-cresol; and 0.3% of an anti-aging agent, i.e., a peroxide decomposer.
The transition coating comprises the following raw materials in percentage by mass:
25% of acrylate; 1.1% of a cross-linking agent; 0.5% of a catalyst; 5% of an inhibitor; the balance of ethyl acetate.
A preparation method of a high-temperature-resistant UV-strippable pressure-sensitive adhesive film comprises the following steps:
step 101: weighing 40% of reaction initiator and organic solvent, and mixing to obtain mixed solution;
step 102: respectively weighing 40 percent of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and 60 percent of maleic acid tincture, mixing the mixture with the mixed solution, putting the mixture into a reaction kettle, heating to 75 ℃, reacting for 3 hours, and keeping the temperature at 90 ℃ for 4 hours to obtain a prepolymer;
step 103: adding the rest of the mixture of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and cyclohexyl methacrylate in proportion into the prepolymer in the step 102 at a constant speed, simultaneously adding the rest of the mixed solution in the step 101, reacting at the temperature of 90 ℃, and continuing to preserve heat for 2 hours after the dropwise addition is finished; dropwise adding the rest of reaction initiator within 2 hours under the condition of 90 ℃, and after dropwise adding, continuously preserving the heat for 2 hours and finishing the reaction; adding an adjusting solvent into a product obtained by the reaction to adjust the viscosity of the product to be 400KPa.s and the solid content of the product to be 30 percent, and preparing the high-temperature-resistant pressure-sensitive adhesive;
step 104: weighing the high-temperature-resistant pressure-sensitive adhesive, the photosensitive polyfunctional oligomer, the curing agent and the photoinitiator according to the proportion, and mixing to prepare the UV visbreaking adhesive;
step 105: preparing a base film which is well coated, uniformly coating the UV visbreaking adhesive on the base film to form a coating with the thickness of 20 mu m, heating and drying at 110 ℃, and forming the high-temperature resistant UV visbreaking layer on the base film to prepare the high-temperature resistant UV peelable pressure-sensitive adhesive film.
The preparation method of the PET priming coating comprises the following steps:
weighing a solvent according to a proportion, adding the solvent into polyurethane resin, and stirring for 15 minutes at a stirring speed of 800 r/min; adding the cross-linking agent, the anti-blocking agent and the inhibitor in proportion and continuously stirring for 15 minutes; after stirring, adding ethyl acetate in a proportional amount for dilution to prepare a coating liquid;
coating the coating liquid on a PET film to form a coating layer with the thickness of 0.6 mu m; heating to 65 ℃ and curing for 32 s; forming a primer layer; and cooling to room temperature to obtain the PET priming coat.
Comparative example No. two
A high-temperature resistant UV strippable pressure-sensitive adhesive film comprises a base film and a high-temperature resistant UV anti-adhesive layer; the high-temperature UV visbreaking layer comprises the following raw materials in percentage by mass:
60% of high-temperature-resistant pressure-sensitive adhesive, which comprises the following raw materials in percentage by mass:
21 percent of acrylic acid-2-ethylhexyl ester, 12 percent of octadecyl acrylate, 0.6 percent of maleic acid tincture, 0.2 percent of cyclohexyl methacrylate, 1.1 percent of 2-acetamidoacrylic acid and 0.5 percent of reaction initiator namely azobisisobutyronitrile, and the balance of organic solvent ethyl acetate;
29% of a photosensitive multifunctional oligomer;
0.6% of a curing agent, namely a naphthyl curing agent; and 0.5% of a photoinitiator, i.e. a benzil derivative.
The high-temperature resistant UV visbreaking layer also comprises the following raw materials in percentage by mass:
0.3% of a plasticizer, i.e. a phthalic acid derivative;
0.1% of antioxidant 2, 6-di-tert-butyl-p-cresol; and 0.3% of an anti-aging agent, i.e., a peroxide decomposer.
The transition coating comprises the following raw materials in percentage by mass:
25% of acrylate; 1.1% of a cross-linking agent; 0.5% of a catalyst; 5% of an inhibitor; the balance of ethyl acetate.
A preparation method of a high-temperature-resistant UV-strippable pressure-sensitive adhesive film comprises the following steps:
step 101: weighing 40% of reaction initiator and organic solvent, and mixing to obtain mixed solution;
step 102: respectively weighing 40 percent of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and 60 percent of maleic acid tincture, mixing the mixture with the mixed solution, putting the mixture into a reaction kettle, heating to 75 ℃, reacting for 3 hours, and keeping the temperature at 90 ℃ for 4 hours to obtain a prepolymer;
step 103: adding the rest of the mixture of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and cyclohexyl methacrylate in proportion into the prepolymer in the step 102 at a constant speed, simultaneously adding the rest of the mixed solution in the step 101, reacting at the temperature of 90 ℃, and continuing to preserve heat for 2 hours after the dropwise addition is finished; dropwise adding the rest of reaction initiator within 2 hours under the condition of 90 ℃, and after dropwise adding, continuously preserving the heat for 2 hours and finishing the reaction; adding an adjusting solvent into a product obtained by the reaction to adjust the viscosity of the product to be 400KPa.s and the solid content of the product to be 30 percent, and preparing the high-temperature-resistant pressure-sensitive adhesive;
step 104: weighing the high-temperature-resistant pressure-sensitive adhesive, the photosensitive polyfunctional oligomer, the curing agent and the photoinitiator according to the proportion, and mixing to prepare the UV visbreaking adhesive;
step 105: preparing a base film which is well coated, uniformly coating the UV visbreaking adhesive on the base film to form a coating with the thickness of 20 mu m, heating and drying at 110 ℃, and forming the high-temperature resistant UV visbreaking layer on the base film to prepare the high-temperature resistant UV peelable pressure-sensitive adhesive film.
The preparation method of the PET priming coating comprises the following steps:
weighing a solvent according to a proportion, adding the solvent into polyurethane resin, and stirring for 15 minutes at a stirring speed of 800 r/min; adding the cross-linking agent, the anti-blocking agent and the inhibitor in proportion and continuously stirring for 15 minutes; after stirring, adding ethyl acetate in a proportional amount for dilution to prepare a coating liquid;
coating the coating liquid on a PET film to form a coating layer with the thickness of 0.6 mu m; heating to 65 ℃ and curing for 32 s; forming a primer layer; and cooling to room temperature to obtain the PET priming coat.
Comparative example No. three
A high-temperature resistant UV strippable pressure-sensitive adhesive film comprises a base film and a high-temperature resistant UV anti-adhesive layer; the high-temperature UV visbreaking layer comprises the following raw materials in percentage by mass:
60% of high-temperature-resistant pressure-sensitive adhesive, which comprises the following raw materials in percentage by mass:
21 percent of acrylic acid-2-ethylhexyl ester, 12 percent of octadecyl acrylate, 0.6 percent of maleic acid tincture, 0.2 percent of cyclohexyl methacrylate, 1.1 percent of 2-acetamidoacrylic acid and 0.5 percent of reaction initiator namely azobisisobutyronitrile, and the balance of organic solvent ethyl acetate;
29% of a photosensitive multifunctional oligomer;
0.6 percent of curing agent, namely a polybasic isocyanate curing agent; and 0.5% of a photoinitiator, i.e. a benzil derivative.
The high-temperature resistant UV visbreaking layer also comprises the following raw materials in percentage by mass:
0.3% of a plasticizer, i.e. a phthalic acid derivative;
0.1% of antioxidant 2, 6-di-tert-butyl-p-cresol; and 0.3% of an anti-aging agent, i.e., a peroxide decomposer.
The transition coating comprises the following raw materials in percentage by mass:
25% of acrylate; 1.1% of a cross-linking agent; 0.5% of a catalyst; 5% of an inhibitor; the balance of ethyl acetate.
A preparation method of a high-temperature-resistant UV-strippable pressure-sensitive adhesive film comprises the following steps:
step 101: weighing 40% of reaction initiator and organic solvent, and mixing to obtain mixed solution;
step 102: respectively weighing 40 percent of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and 60 percent of maleic acid tincture, mixing the mixture with the mixed solution, putting the mixture into a reaction kettle, heating to 75 ℃, reacting for 3 hours, and keeping the temperature at 90 ℃ for 4 hours to obtain a prepolymer;
step 103: adding the rest of the mixture of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetamidoacrylic acid and cyclohexyl methacrylate into the prepolymer in the step 102 at one time, adding the rest of the mixed solution in the step 101 at the same time, reacting at the temperature of 90 ℃, and continuing to preserve heat for 2 hours after the dropwise addition is finished; dropwise adding the rest of reaction initiator within 2 hours under the condition of 90 ℃, and after dropwise adding, continuously preserving the heat for 2 hours and finishing the reaction; adding an adjusting solvent into a product obtained by the reaction to adjust the viscosity of the product to be 400KPa.s and the solid content of the product to be 30 percent, and preparing the high-temperature-resistant pressure-sensitive adhesive;
step 104: weighing the high-temperature-resistant pressure-sensitive adhesive, the photosensitive polyfunctional oligomer, the curing agent and the photoinitiator according to the proportion, and mixing to prepare the UV visbreaking adhesive;
step 105: preparing a base film which is well coated, uniformly coating the UV visbreaking adhesive on the base film to form a coating with the thickness of 20 mu m, heating and drying at 110 ℃, and forming the high-temperature resistant UV visbreaking layer on the base film to prepare the high-temperature resistant UV peelable pressure-sensitive adhesive film.
The preparation method of the PET priming coating comprises the following steps:
weighing a solvent according to a proportion, adding the solvent into polyurethane resin, and stirring for 15 minutes at a stirring speed of 800 r/min; adding the cross-linking agent, the anti-blocking agent and the inhibitor in proportion and continuously stirring for 15 minutes; after stirring, adding ethyl acetate in a proportional amount for dilution to prepare a coating liquid;
coating the coating liquid on a PET film to form a coating layer with the thickness of 0.6 mu m; heating to 65 ℃ and curing for 32 s; forming a primer layer; and cooling to room temperature to obtain the PET priming coat.
The high temperature resistant UV-peelable pressure-sensitive adhesive films obtained in examples one to two and comparative examples one to three were tested for the storage time at high temperature, the initial tack property, the tack holding property, the 180 ° peel strength, and the 180 ° peel strength after UV irradiation, and the test results are shown in table 1: wherein the initial adhesion is tested according to the regulation of the national standard GB/T4852; the permanent adhesion is tested according to the regulations of the national standard GB/T4851; the 180-degree peel strength is tested according to the specification of the national standard GB/T2792; the 180 DEG peel strength after ultraviolet irradiation was measured according to the specifications of the national standard GB/T2792 after irradiation for 20 seconds by an ultraviolet light tube (wavelength of 420nm, optical power of 19mW/cm 2). After the high temperature treatment, the 180 DEG peel strength after the ultraviolet irradiation is measured by placing the test sample at a high temperature of 200 ℃ for 1 hour, irradiating for 20 seconds by using an ultraviolet light tube (the wavelength is 420nm, and the light power is 19mW/cm2), and then measuring according to the regulations of the national standard GB/T2792.
Table 1 comparison of test results of different examples
The above is a preferred embodiment of the present invention, and the anti-fog anti-reflection protective film obtained by the same or similar steps as the above examples of the present invention is within the protection scope of the present invention.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of adaptation of the invention, and further modifications can be easily implemented by those skilled in the art, so that the invention is not limited to the specific details and the examples shown herein, without departing from the general concept defined by the claims and the scope of equivalents.
Claims (10)
1. A high-temperature resistant UV strippable pressure-sensitive adhesive film comprises a base film and a high-temperature resistant UV anti-adhesive layer; the high-temperature UV anti-adhesion layer is characterized by comprising the following raw materials in percentage by mass:
55-81% of high-temperature-resistant pressure-sensitive adhesive, wherein the high-temperature-resistant pressure-sensitive adhesive comprises the following raw materials in percentage by mass:
18-22% of 2-ethylhexyl acrylate, 10-15% of octadecyl acrylate, 0.2-1.1% of maleic acid tincture, 0.05-0.8% of cyclohexyl methacrylate, 0.8-1.3% of 2-acetaminoacrylic acid, 0.2-0.7% of a reaction initiator and the balance of an organic solvent;
20-35% of a photosensitive multifunctional oligomer;
0.2-0.7% of curing agent; and 0.2-0.6% of photoinitiator.
2. The high temperature resistant UV peelable pressure-sensitive adhesive film according to claim 1, wherein the high temperature resistant UV removable adhesive layer further comprises the following raw materials in percentage by mass:
0.05-0.1% of a plasticizer;
0.05-0.2% of antioxidant; and 0.1-0.5% of anti-aging agent.
3. The high temperature resistant UV-peelable pressure-sensitive adhesive film according to claim 1, wherein the organic solvent is at least one of ethyl acetate or butyl acetate.
4. The high temperature resistant UV peelable pressure sensitive adhesive film according to claim 1, wherein the base film is a PET base coating film comprising a PET film and a transitional coating layer provided on the PET film.
5. The high temperature resistant UV-peelable pressure-sensitive adhesive film according to claim 4, wherein the transition coating layer comprises the following raw materials in percentage by mass:
20-31% of acrylate; 0.6-1.2% of a cross-linking agent; 0.3-0.7% of a catalyst; 3-5% of an inhibitor; the balance of ethyl acetate.
6. The high temperature resistant UV peelable pressure sensitive adhesive film according to claim 1, wherein the reaction initiator is azobisisobutyronitrile.
7. The high temperature resistant UV-peelable pressure-sensitive adhesive film according to claim 1, wherein the curing agent is a polyisocyanate curing agent.
8. The preparation method of the high-temperature-resistant UV-strippable pressure-sensitive adhesive film is characterized by comprising the following steps of:
step 101: weighing 35-52% of reaction initiator and organic solvent, and mixing to obtain mixed solution;
step 102: respectively weighing 35-52% of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and 50-65% of maleic acid tincture, mixing with the mixed solution, putting into a reaction kettle, heating to 75 ℃, reacting for 2.5-3.5 hours, and keeping the temperature at 90 ℃ for 4 hours to obtain a prepolymer;
step 103: adding the rest of the mixture of acrylic acid-2-ethylhexyl ester, octadecyl acrylate, 2-acetaminoacrylic acid and cyclohexyl methacrylate into the prepolymer in the step 102, simultaneously adding the rest of the mixed solution in the step 101, reacting at the temperature of 80-90 ℃, and continuing to preserve heat for 1-2 hours after the dropwise addition is finished; dropwise adding the rest of reaction initiator within 1-2 hours under the condition of 85-95 ℃, and after dropwise adding, continuing to keep the temperature for 1.5-2.5 hours to finish the reaction; adding an adjusting solvent into the product obtained by the reaction to adjust the viscosity to be 150-500KPa.s and the solid content to be 25-35 percent, thus obtaining the high-temperature-resistant pressure-sensitive adhesive;
step 104: weighing the high-temperature-resistant pressure-sensitive adhesive, the photosensitive polyfunctional oligomer, the curing agent and the photoinitiator according to the proportion, and mixing to prepare the UV visbreaking adhesive;
step 105: preparing a base film which is coated with a base coat, uniformly coating the UV viscosity-reducing adhesive on the base film to form a coating with the thickness of 10-20 mu m, heating and drying at 110 ℃, and forming the high-temperature-resistant UV viscosity-reducing layer on the base film to prepare the high-temperature-resistant UV peelable pressure-sensitive adhesive film.
9. The method for preparing the high temperature resistant UV peelable pressure sensitive adhesive film according to claim 8, wherein the step 103 is performed by adding a plasticizer, an antioxidant and an anti-aging agent to the high temperature resistant pressure sensitive adhesive in a ratio.
10. The method for preparing the high temperature resistant UV peelable pressure sensitive adhesive film according to claim 8, wherein in step 103, a mixture of 2-ethylhexyl acrylate, stearyl acrylate, 2-acetaminoacrylic acid and cyclohexyl methacrylate is uniformly added dropwise to the prepolymer.
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| CN111171741A (en) * | 2020-02-14 | 2020-05-19 | 安徽富印新材料有限公司 | High-temperature-resistant UV (ultraviolet) peelable pressure-sensitive adhesive film and preparation method thereof |
| CN114214010A (en) * | 2021-12-27 | 2022-03-22 | 安徽富印新材料有限公司 | Easy-to-peel pressure sensitive adhesive and preparation method thereof |
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