CN113512368A - Preparation method of double UV (ultraviolet) curing paint surface protective film - Google Patents
Preparation method of double UV (ultraviolet) curing paint surface protective film Download PDFInfo
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- CN113512368A CN113512368A CN202110894355.XA CN202110894355A CN113512368A CN 113512368 A CN113512368 A CN 113512368A CN 202110894355 A CN202110894355 A CN 202110894355A CN 113512368 A CN113512368 A CN 113512368A
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- 230000001681 protective effect Effects 0.000 title claims abstract description 22
- 239000003973 paint Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000758 substrate Substances 0.000 claims abstract description 26
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 17
- 238000003848 UV Light-Curing Methods 0.000 claims abstract description 16
- 230000009977 dual effect Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000001723 curing Methods 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 10
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims abstract description 9
- 239000003292 glue Substances 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 238000010030 laminating Methods 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 21
- 229910021389 graphene Inorganic materials 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000005886 esterification reaction Methods 0.000 claims description 16
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 15
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 239000004593 Epoxy Substances 0.000 claims description 9
- XRWMGCFJVKDVMD-UHFFFAOYSA-M didodecyl(dimethyl)azanium;bromide Chemical compound [Br-].CCCCCCCCCCCC[N+](C)(C)CCCCCCCCCCCC XRWMGCFJVKDVMD-UHFFFAOYSA-M 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 8
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 8
- 239000003999 initiator Substances 0.000 claims description 8
- 238000001291 vacuum drying Methods 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 238000009210 therapy by ultrasound Methods 0.000 claims description 7
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 239000003085 diluting agent Substances 0.000 claims description 4
- XXBDWLFCJWSEKW-UHFFFAOYSA-N dimethylbenzylamine Chemical compound CN(C)CC1=CC=CC=C1 XXBDWLFCJWSEKW-UHFFFAOYSA-N 0.000 claims description 4
- 238000013007 heat curing Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 4
- 239000000178 monomer Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 230000002194 synthesizing effect Effects 0.000 claims description 4
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 3
- 230000007774 longterm Effects 0.000 abstract description 6
- 230000035699 permeability Effects 0.000 abstract description 3
- 238000002834 transmittance Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000002940 repellent Effects 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 238000001029 thermal curing Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
- C09J163/10—Epoxy resins modified by unsaturated compounds
-
- 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
-
- 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
- C09J7/50—Adhesives in the form of films or foils characterised by a primer layer between the carrier and the adhesive
-
- 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
- C09J2203/354—Applications of adhesives in processes or use of adhesives in the form of films or foils for automotive applications
-
- 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
- C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
- C09J2301/208—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
-
- 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
- C09J2463/00—Presence of epoxy resin
-
- 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
- C09J2463/00—Presence of epoxy resin
- C09J2463/003—Presence of epoxy resin in the primer coating
-
- 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
- C09J2475/006—Presence of polyurethane in the substrate
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a preparation method of a double UV curing paint protective film, belonging to the technical field of protective films, and the method comprises the following steps: 1) preparing a TPU substrate; comprises preparing a particle dry matter A; preparing a TPU substrate; 2) preparing a double UV curing coating; comprises preparing a prepolymer; preparing curing glue; double UV curing; 3) preparing a double UV curing paint surface protective film; and coating a pressure-sensitive adhesive on one side of the cured TPU substrate, drying, and finally laminating with release paper. The dual UV curing paint surface protective film prepared by the invention has high temperature resistance, stain resistance, high brightness, permeability and self-cleaning property; can keep hydrophobicity in long-term use, and has the characteristics of long-term high stain resistance, high transmittance, no light loss and no raindrop.
Description
Technical Field
The invention belongs to the technical field of protective films, and particularly relates to a preparation method of a double-UV-cured paint protective film.
Background
The curing technology of the coating of the car cover on the market is commonly used for thermal curing; the thermosetting has low requirements on coating equipment and coating materials, the service life is short, and the problems can occur within 2-3 years normally. The thermosetting coating is only coated on the surface of a substrate, the common coating process can be finished by heating through a wind box, the coating cannot be immersed into the substrate, the adhesion force of the coating is poor, the coating can fade about one year, and the coating has no hydrophobicity and is easy to lose gloss, dull, stain in rain, yellow stain, hydrolyze, absorb dust and the like.
Disclosure of Invention
Technical problem to be solved
A method for double UV curing of a paint protective film is proposed to overcome the disadvantages of thermal curing.
(II) technical scheme
The invention is realized by the following technical scheme: a preparation method of a double UV curing paint protective film;
the method comprises the following steps:
1) preparation of TPU substrates
a. Weighing graphene oxide and water, placing the graphene oxide and the water into a container for mixing, performing low-temperature ultrasonic treatment to obtain a graphene oxide suspension, adding didodecyl dimethyl ammonium bromide, performing oscillation stirring under the protection of nitrogen to obtain a mixture, washing the mixture with absolute ethyl alcohol and deionized water, and performing vacuum drying to obtain a particle dry matter A;
b. mixing the particle dry matter A with an N, N-dimethylformamide solution, performing ultrasonic dispersion uniformly at a ratio of 5g/L, adding a TPU solution, mixing uniformly at a ratio of 250:1, putting the mixture into a vacuum oven, and drying to form a film to obtain a TPU base material;
2) preparation of Dual UV-curable coatings
a. Synthesizing a prepolymer; putting bisphenol A type epoxy resin E-51 into a container and stirring for oil bath; dripping methacrylic acid containing N, N-dimethylbenzylamine and p-hydroxyanisole in the oil bath process to perform esterification reaction, and obtaining methacrylic acid epoxy monoester after the esterification reaction is completed;
b. configuration of dual curing glue
Weighing a photoinitiator, adding an active diluent monomer for dissolving, stirring until the photoinitiator is completely dissolved, adding a thermal initiator, and stirring until the thermal initiator is completely dissolved; adding the prepared methacrylic acid epoxy monoester, uniformly stirring, and standing for later use;
c. cleaning the surface of the TPU substrate, coating the prepared glue on the surface of the TPU substrate, curing the TPU substrate by a nitrogen-oxygen-isolation electrodeless UV lamp, performing heat curing in a vacuum drying oven at 80 ℃ for 300min, standing at room temperature for 6-12 h, and taking out;
3) preparing a double UV curing paint surface protective film; and coating a pressure-sensitive adhesive on one side of the cured TPU substrate, drying, and finally laminating with release paper.
As a further illustration of the above scheme, in the step 1) a, the ratio of the graphene oxide to the water is 15g/ml, and the ratio of the didodecyldimethylammonium bromide to the graphene oxide is 12: 1; the low-temperature ultrasonic treatment time is 20-60 min; the stirring time with shaking was 18 hours.
As a further illustration of the above scheme, the oil bath temperature in step 2) a is 110 ℃; the acid value was measured by sampling every 10min for the esterification reaction, and when the acid value in the reaction system was less than 3mg KOH/g, the esterification reaction was considered to be completed.
As a further illustration of the above scheme, the amount of the pressure sensitive adhesive coated in the step 3) is 30-50g/m2The drying temperature is 50-70 ℃, and the drying time is 6-10 min.
(III) advantageous effects
Compared with the prior art, the invention has the following beneficial effects: the dual UV curing paint surface protective film prepared by the invention has high temperature resistance, stain resistance, high brightness, permeability and self-cleaning property; can keep hydrophobicity in long-term use, and has the characteristics of long-term high stain resistance, high transmittance, no light loss and no raindrop.
Detailed Description
A preparation method of a double UV curing paint protective film;
the method comprises the following steps:
1) preparation of TPU substrates
a. Weighing graphene oxide and water, placing the graphene oxide and the water into a container for mixing, performing low-temperature ultrasonic treatment to obtain a graphene oxide suspension, adding didodecyl dimethyl ammonium bromide, performing oscillation stirring under the protection of nitrogen to obtain a mixture, washing the mixture with absolute ethyl alcohol and deionized water, and performing vacuum drying to obtain a particle dry matter A;
b. mixing the particle dry matter A with an N, N-dimethylformamide solution, performing ultrasonic dispersion uniformly at a ratio of 5g/L, adding a TPU solution, mixing uniformly at a ratio of 250:1, putting the mixture into a vacuum oven, and drying to form a film to obtain a TPU base material;
2) preparation of Dual UV-curable coatings
a. Synthesizing a prepolymer; putting bisphenol A type epoxy resin E-51 into a container and stirring for oil bath; dripping methacrylic acid containing N, N-dimethylbenzylamine and p-hydroxyanisole in the oil bath process to perform esterification reaction, and obtaining methacrylic acid epoxy monoester after the esterification reaction is completed;
b. configuration of dual curing glue
Weighing a photoinitiator, adding an active diluent monomer for dissolving, stirring until the photoinitiator is completely dissolved, adding a thermal initiator, and stirring until the thermal initiator is completely dissolved; adding the prepared methacrylic acid epoxy monoester, uniformly stirring, and standing for later use;
c. cleaning the surface of the TPU substrate, coating the prepared glue on the surface of the TPU substrate, curing the TPU substrate by a nitrogen-oxygen-isolation electrodeless UV lamp, performing heat curing in a vacuum drying oven at 80 ℃ for 300min, standing at room temperature for 6-12 h, and taking out;
3) preparing a double UV curing paint surface protective film; and coating a pressure-sensitive adhesive on one side of the cured TPU substrate, drying, and finally laminating with release paper.
Wherein, in the step 1) a, the ratio of the graphene oxide to the water is 15g/ml, and the ratio of the didodecyldimethylammonium bromide to the graphene oxide is 12: 1; the low-temperature ultrasonic treatment time is 20-60 min; the stirring time with shaking was 18 hours.
Wherein, the oil bath temperature in the step 2) a is 110 ℃; the acid value was measured by sampling every 10min for the esterification reaction, and when the acid value in the reaction system was less than 3mg KOH/g, the esterification reaction was considered to be completed.
Wherein, the amount of the pressure sensitive adhesive coated in the step 3) is 30-50g/m2The drying temperature is 50-70 ℃, and the drying time is 6-10 min.
The working principle is as follows:
examples
1) Preparation of TPU substrates
a. Weighing graphene oxide and water, putting the graphene oxide and the water into a container, mixing, performing low-temperature ultrasonic treatment for 20-60min to obtain a graphene oxide suspension, and adding didodecyl dimethyl ammonium bromide, wherein the ratio of the didodecyl dimethyl ammonium bromide to the graphene oxide is 12: 1; oscillating and stirring under the protection of nitrogen for 18 hours to obtain a mixture, washing with absolute ethyl alcohol and deionized water, and then performing vacuum drying to obtain a particle dry matter A;
the tensile strength of the TPU substrate can be improved to more than 450% by the graphene, and the subsequent double UV curing processing quality is ensured;
b. mixing the particle dry matter A with an N, N-dimethylformamide solution, performing ultrasonic dispersion uniformly at a ratio of 5g/L, adding a TPU solution, mixing uniformly at a ratio of 250:1, putting the mixture into a vacuum oven, and drying to form a film to obtain a TPU base material;
in the step, didodecyl dimethyl ammonium bromide is adopted to modify the graphene oxide, and the modified mixed particles are well dispersed in an N, N-dimethylformamide solution; the TPU composite material prepared by the solution method can improve the tensile strength of the TPU.
2) Preparation of Dual UV-curable coatings
a. Synthesizing a prepolymer; putting bisphenol A type epoxy resin E-51 into a container, and stirring in an oil bath at the temperature of 110 ℃; dropwise adding methacrylic acid containing N, N-dimethylbenzylamine and p-hydroxyanisole in the oil bath process to perform esterification reaction, sampling every 10min for the esterification reaction to determine the acid value, and considering that the esterification reaction is finished when the acid value in the reaction system is less than 3mg KOH/g; the esterification reaction is completed to obtain methacrylic acid epoxy monoester;
b. configuration of dual curing glue
Weighing a photoinitiator, adding an active diluent monomer for dissolving, stirring until the photoinitiator is completely dissolved, adding a thermal initiator, and stirring until the thermal initiator is completely dissolved; adding the prepared methacrylic acid epoxy monoester, uniformly stirring, and standing for later use;
c. cleaning the surface of the TPU substrate, coating the prepared glue on the surface of the TPU substrate, curing the TPU substrate by a nitrogen-oxygen-isolation electrodeless UV lamp, performing heat curing in a vacuum drying oven at 80 ℃ for 300min, standing at room temperature for 6-12 h, and taking out;
in the step, epoxy resin and methacrylic acid are adopted as raw materials to synthesize the methacrylic acid epoxy monoester capable of being UV cured, so that the problem of incompatibility of components of a dual curing system can be solved;
3) preparing a double UV curing paint surface protective film; coating a pressure-sensitive adhesive on one side of the cured TPU substrate, drying, and finally pressing with release paper; the amount of the pressure-sensitive adhesive coated is 30-50g/m2The drying temperature is 50-70 ℃, and the drying time is 6-10 min.
The dual UV curing paint surface protective film prepared by the invention has high temperature resistance, stain resistance, high brightness, permeability and self-cleaning property; the water repellent can be kept in long-term use, and the water repellent has the characteristics of long-term high stain resistance, high transmittance, no light loss and no raindrop;
the test results of this example are as follows:
the test method comprises the following steps: cutting the protective film into strips for testing;
TABLE 1 test results
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. A preparation method of a double UV curing paint protective film; the method is characterized in that:
the method comprises the following steps:
1) preparation of TPU substrates
a. Weighing graphene oxide and water, placing the graphene oxide and the water into a container for mixing, performing low-temperature ultrasonic treatment to obtain a graphene oxide suspension, adding didodecyl dimethyl ammonium bromide, performing oscillation stirring under the protection of nitrogen to obtain a mixture, washing the mixture with absolute ethyl alcohol and deionized water, and performing vacuum drying to obtain a particle dry matter A;
b. mixing the particle dry matter A with an N, N-dimethylformamide solution, performing ultrasonic dispersion uniformly at a ratio of 5g/L, adding a TPU solution, mixing uniformly at a ratio of 250:1, putting the mixture into a vacuum oven, and drying to form a film to obtain a TPU base material;
2) preparation of Dual UV-curable coatings
a. Synthesizing a prepolymer; putting bisphenol A type epoxy resin E-51 into a container and stirring for oil bath; dripping methacrylic acid containing N, N-dimethylbenzylamine and p-hydroxyanisole in the oil bath process to perform esterification reaction, and obtaining methacrylic acid epoxy monoester after the esterification reaction is completed;
b. configuration of dual curing glue
Weighing a photoinitiator, adding an active diluent monomer for dissolving, stirring until the photoinitiator is completely dissolved, adding a thermal initiator, and stirring until the thermal initiator is completely dissolved; adding the prepared methacrylic acid epoxy monoester, uniformly stirring, and standing for later use;
c. cleaning the surface of the TPU substrate, coating the prepared glue on the surface of the TPU substrate, curing the TPU substrate by a nitrogen-oxygen-isolation electrodeless UV lamp, performing heat curing in a vacuum drying oven at 80 ℃ for 300min, standing at room temperature for 6-12 h, and taking out;
3) preparing a double UV curing paint surface protective film; and coating a pressure-sensitive adhesive on one side of the cured TPU substrate, drying, and finally laminating with release paper.
2. The method for preparing a dual UV curable finish protective film according to claim 1, wherein: in the step 1) a, the ratio of graphene oxide to water is 15g/ml, and the ratio of didodecyldimethylammonium bromide to graphene oxide is 12: 1; the low-temperature ultrasonic treatment time is 20-60 min; the stirring time with shaking was 18 hours.
3. The method for preparing a dual UV curable finish protective film according to claim 1, wherein: the temperature of the oil bath in the step 2) a is 110 ℃; the acid value was measured by sampling every 10min for the esterification reaction, and when the acid value in the reaction system was less than 3mg KOH/g, the esterification reaction was considered to be completed.
4. The method for preparing a dual UV curable finish protective film according to claim 1, wherein: the amount of the pressure-sensitive adhesive coated in the step 3) is 30-50g/m2The drying temperature is 50-70 ℃, and the drying time is 6-10 min.
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| CN202110894355.XA CN113512368A (en) | 2021-08-05 | 2021-08-05 | Preparation method of double UV (ultraviolet) curing paint surface protective film |
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| CN202110894355.XA CN113512368A (en) | 2021-08-05 | 2021-08-05 | Preparation method of double UV (ultraviolet) curing paint surface protective film |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627350A (en) * | 2013-12-17 | 2014-03-12 | 张家港康得新光电材料有限公司 | Dual-curing pressure sensitive adhesive |
| CN108912304A (en) * | 2018-07-25 | 2018-11-30 | 福州大学 | A kind of preparation method of high-termal conductivity modified TPU film |
| CN109880412A (en) * | 2018-12-27 | 2019-06-14 | 新纶科技（常州）有限公司 | The automobile shipment of a kind of no-solvent type UV adhesive and the application adhesive and the preparation method of lacquer painting protective film |
| CN111378391A (en) * | 2020-04-27 | 2020-07-07 | 广东硕成科技有限公司 | High-temperature-resistant protective film for automobile paint spraying shielding and preparation method thereof |
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2021
- 2021-08-05 CN CN202110894355.XA patent/CN113512368A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627350A (en) * | 2013-12-17 | 2014-03-12 | 张家港康得新光电材料有限公司 | Dual-curing pressure sensitive adhesive |
| CN108912304A (en) * | 2018-07-25 | 2018-11-30 | 福州大学 | A kind of preparation method of high-termal conductivity modified TPU film |
| CN109880412A (en) * | 2018-12-27 | 2019-06-14 | 新纶科技（常州）有限公司 | The automobile shipment of a kind of no-solvent type UV adhesive and the application adhesive and the preparation method of lacquer painting protective film |
| CN111378391A (en) * | 2020-04-27 | 2020-07-07 | 广东硕成科技有限公司 | High-temperature-resistant protective film for automobile paint spraying shielding and preparation method thereof |
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