A waterproof adhesive for intelligent dimming automotive membrane electrode

Abstract

The present invention discloses a waterproof adhesive for intelligent dimming automobile membrane electrode, which relates to the field of supporting technology for the preparation of intelligent dimming automobile membrane; it includes an adhesive protective surface layer and a light-curing bottom layer from the outside to the inside, and the adhesive protective surface layer is a single-component cyanoacrylate adhesive layer. The light-curing bottom layer is a UV acrylic adhesive layer, which includes the following raw material components in mass percentage: 60-90% UV acrylic compound, 0.5-2% photoinitiator, and 20-40% polyolefin and alkane inert components. It has the characteristics of not corroding the dimming film liquid crystal layer and avoiding short circuit of the intelligent dimming automobile membrane electrode, and can be used for the side windows and sunroofs of various types of automobiles.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent dimming automobile film preparation supporting technology, in particular to a waterproof glue for intelligent dimming automobile film electrode. Background Art

[0002] Smart dimming film is a film that can adjust the state of light passing through. It mainly works between the scattered state and the transparent state. The film itself can be changed between the transparent and non-transparent states (the visual effect is close to frosted glass), and the transparency is adjusted by voltage. However, smart dimming film is generally used in modern architectural glass curtain walls, window glass, building internal partitions and other fields. With the rapid development of the automobile market, the production of functional films is becoming more and more diversified. Applying smart dimming film technology to automotive films can control the transparency and atomization state of the entire automotive glass through switches to achieve the purpose of controlling light. Compared with ordinary automotive films and automotive curtains, it can not only scientifically and intelligently block strong light and protect personal privacy, but also has excellent heat insulation and sound insulation effects. Switching to an opaque state in summer reflects sunlight heat and lowers the temperature inside the car; in winter, when the car is cold, the light-transmitting skylight can increase the temperature inside the car.

[0003] In the prior art, when the smart dimming film is used in automobiles, insufficient attention is paid to the waterproofness and corrosion resistance of the smart dimming film electrode, which are factors related to safe driving and stability. Usually, a waterproof mode of applying silica gel on the surface of the smart dimming film electrode is adopted. Since silica gel is a highly active adsorption material, although it does not react with any substance except strong alkali and hydrofluoric acid, is insoluble in water and any solvent, is non-toxic and tasteless, and has stable chemical properties, its unique microporous structure makes it have high adsorption performance. When it is applied to the car glass, the dust it adsorbs is prone to short circuit and burn the electrode on rainy days, thus leading to the existence of safety hazards.

[0004] The "waterproof tape for automotive batteries and its preparation method" disclosed in the Chinese patent application (patent application number 201580014263.0) has a filler layer on one side of the base material layer of the waterproof tape for automotive batteries. Therefore, despite its thin thickness, it has excellent adhesion, impact resistance and waterproofness.

[0005] Another Chinese invention patent application (patent application number 201910044977.6) discloses a "method for producing a waterproof new energy battery pack wiring harness", which specifically includes the following steps: S1, pre-processing of the wiring harness: first, fix one end of the wire harness to be processed on the wiring harness processing equipment, S2, sealing processing of multi-strand wiring harnesses, S3, preparation of sterilization and waterproof glue, S4, wiring harness forming, S5, wiring harness waterproof post-processing, and the invention relates to the field of new energy technology. The method for producing a waterproof new energy battery pack wiring harness avoids the situation in which the sealing water-draining glue and the wiring harness rubber sleeve are corroded and aged by microorganisms during the long-term use of the wiring harness, thereby ensuring the waterproof effect of the wiring harness and greatly extending the service life of the wiring harness. It is well realized that the external sleeve and internal water-draining glue of the wiring harness are improved to extend the service life of the wiring harness, and the growth of microorganisms in the protective cover and waterproof glue of the wiring harness is inhibited to achieve the purpose of corrosion resistance and anti-aging of the wiring harness.

[0006] There is also a "film waterproof glue" disclosed in a Chinese invention patent application (patent application number 91106980.1), which uses trihydroxy polyoxypropylene ether, dihydroxy polyoxypropylene ether, toluene diisocyanate, dibutyl ester, coal tar, and benzene residue oil as raw materials, which are mixed and stirred at a certain temperature; the production process of the invention is simple, the equipment is small, the cost is low, the adhesion is strong, the elongation is large, it is elastic, cold-resistant, heat-resistant, aging-resistant, has good drug resistance, high airtightness, watertightness and excellent waterproof performance.

[0007] There is also a Chinese invention patent application (patent application number 201711116862.0) that discloses "a waterproof membrane for automobile doors", which is composed of a composite membrane, wherein the composite membrane is located in a membrane groove of the door, wherein the composite membrane includes a membrane body and a heat insulating sheet, wherein the membrane body is bonded and sealed to the inner wall of the membrane groove by a strong waterproof adhesive, wherein the heat insulating sheet is located in the interlayer of the membrane body, and sponge sheets are provided on both sides of the heat insulating sheet, and fixing holes are provided on the heat insulating surfaces on both sides of the heat insulating sheet, and rubber fixing blocks are provided on the membrane sheets on both sides of the membrane body, and screw holes are provided on the rubber fixing blocks, wherein the screw holes are fixedly connected by screws penetrating through the through holes on the membrane body and the sponge sheet and the through holes on the heat insulating sheet, and through the design of the heat insulating sheet and the sponge sheet in the composite membrane, the temperatures on both sides of the heat insulating sheet are independent, thereby preventing water droplets generated by the temperature difference from directly contacting the electronic equipment inside the door, thereby protecting the electronic equipment inside the door, and when water mist appears on one side of the composite membrane, the sponge sheet will absorb moisture in the air, thereby keeping the entire composite board dry.

[0008] There is also a Chinese utility model patent (patent application number is 202020603738.8) disclosed in "A waterproof and breathable membrane for automobile headlights", which includes an insulating ring, an adhesive layer 2 is bonded to one side of the insulating ring, an adhesive layer 2 is bonded to the side away from the insulating ring, an adhesive layer 3 is bonded to the side of the wear-resistant layer away from the adhesive layer 2, an adhesive layer 3 is bonded to the side away from the wear-resistant layer, an adhesive layer 4 is bonded to the side of the waterproof layer away from the adhesive layer 3, an air-permeable layer is bonded to the side of the adhesive layer 4 away from the waterproof layer, an adhesive layer 5 is bonded to the side of the air-permeable layer away from the adhesive layer 4, an insulation board is bonded to the side of the adhesive layer 5 away from the air-permeable layer, and a waterproof rubber pad is bonded to the side of the insulation board away from the adhesive layer 5. The beneficial effect of the utility model is that the waterproof rubber pad and the suction cup cooperate with each other, the waterproof rubber pad greatly enhances the firmness of the product adhered to the automobile headlight, and at the same time has a waterproof characteristic, which can prevent the product from falling off due to rain erosion, and suction is generated between the suction cup and the automobile headlight, so that the product is more firmly adsorbed on the automobile headlight and is not easy to fall off, which greatly extends the service life of the product. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide a waterproof glue which can neither corrode the liquid crystal layer of the dimming film nor prevent the short circuit of the membrane electrode of the intelligent dimming automobile.

[0010] In order to solve the above technical problems, the technical solution adopted by the present invention is to invent a waterproof glue for intelligent dimming automobile membrane electrode: from the outside to the inside, it includes an adhesive protective surface layer and a light-curing bottom layer, and the adhesive protective surface layer is a single-component cyanoacrylate adhesive layer.

[0011] The photocurable bottom layer is a UV acrylic adhesive layer, which includes the following raw material components in percentage by weight:

[0012] UV acrylic compounds 60-90,

[0013] Photoinitiator 0.5-2,

[0014] Polyolefin and alkane inert components 20-40.

[0015] The UV acrylic compound is one or two of a UV light-curing prepolymer and a UV light-curing monomer. When there are two, the proportion of each component is equal by weight.

[0016] The UV light-curing prepolymer is one or two of polyurethane acrylate and epoxy acrylate. When it is two, the proportion of each component is equal by weight.

[0017] The UV light-curing monomer is one or more of o-phenylphenoxyethyl acrylate, 2-(p-isopropylphenyl-phenoxy)-ethyl acrylate, ethoxyethoxyethyl acrylate, cyclotrimethylolpropane formal acrylate, ethoxylated phenoxy acrylate, stearic acid acrylate, isodecyl acrylate, 2-phenoxyethyl methacrylate, isotridecyl methacrylate, isobornyl acrylate, benzyl acrylate, dicyclopentenyl acrylate, glycidyl methacrylate, 3-hydroxy-2,2-dimethylpropyl-3-hydroxy-2-dimethylpropyl diacrylate, tricyclodecane dimethanol diacrylate, and ethoxylated bisphenol A diacrylate. When there are more than two types, the proportion of each component is equal by mass.

[0018] The photoinitiator is one or more of 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholine-1-propanone, bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, 2-hydroxy-2-methyl-1-phenylpropanone, ethyl 2,4,6-trimethylbenzoylphenylphosphonate, 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone, and α-hydroxyalkyl phenone. When there are more than two types, the proportion of each component is equal by mass.

[0019] The polyolefin and alkane inert components are one or more of polydecene, polydodecene, N-alkane (N≥10), and squalane. When there are two or more, the proportion of each component is equal by weight.

[0020] At the same time, a method for preparing and applying a waterproof glue for intelligent dimming automotive membrane electrode is also invented, and the preparation and application process is as follows:

[0021] (i) Material preparation: Select the raw material components contained in the cyanoacrylate adhesive and the light-curing base layer according to the mass ratio and set them aside;

[0022] (ii) Mixing: Mix the raw material components contained in the light-curing base layer to obtain the light-curing base layer coating, which is ready for use;

[0023] (iii) Initial coating: Apply the reserved light-curing base coating glue on the intelligent dimming automobile membrane electrode to form the initial light-curing base coating;

[0024] 4. Photocuring: The photocurable bottom layer coated on the smart dimming automobile membrane electrode is irradiated with ultraviolet light for 1-5 minutes with a light intensity of 80-150mW / cm2. After the curing is completed, the photocurable bottom layer is obtained; the thickness of the obtained photocurable bottom layer is 30-80μm, and the optimized thickness is 50μm;

[0025] ㈤. Apply protective film: Apply the reserved cyanoacrylate adhesive on the light-curing base layer, and blow it with hot air at 50-70℃ for 1-5min to form an adhesive protective surface layer (it can be applied once, twice or more times); the obtained light-curing base layer and adhesive protective surface layer together form a waterproof glue for the intelligent dimming automotive membrane electrode.

[0026] The thickness of the obtained adhesive protective surface layer is 30-80 μm, and the optimized thickness is 50 μm;

[0027] Optimally, the ultraviolet light irradiation in the photocuring process is 2-4 minutes, and the light intensity is 90-120mW / cm2; the hot air temperature in the protective film coating process is 55-65°C, and the blowing time is 2-4 minutes.

[0028] Further optimized, the ultraviolet light irradiation time in the photocuring process is 3 minutes, and the light intensity is 100mW / cm2; the hot air temperature in the protective film coating process is 60°C, and the blowing time is 3 minutes.

[0029] The waterproof glue for the smart dimming automobile membrane electrode of the present invention uses a light-curing bottom layer to cover the smart dimming automobile membrane electrode, and the glue formula of the light-curing bottom layer used is very similar to the glue formula in the liquid crystal layer of the smart dimming automobile film. Therefore, after curing, it can not only avoid corrosion of the liquid crystal layer to the greatest extent, but also make its contact with the smart dimming automobile membrane electrode firm and reliable, and prevent it from contacting the outside, so that it is difficult to be corroded by the outside world; in addition, the adhesive protective surface layer of the cyanoacrylate adhesive applied thereon has the characteristics of being resistant to bending and not easy to debond, so it can further play the role of waterproofing the electrode. Therefore, it will not corrode the liquid crystal layer of the dimming film, and can also avoid the occurrence of short circuit phenomenon of the smart dimming automobile membrane electrode. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the embodiments. The following description is by way of example, but the protection scope of the present invention should not be limited thereto.

[0031] Embodiment 1:

[0032] The preparation and application process of the waterproof glue for the intelligent dimming automobile membrane electrode of this embodiment is as follows:

[0033] 1. Prepare the materials: Select the raw materials according to the formula in the following table:

[0034] Component (a) 25 parts CN996J75NS (polyurethane acrylate, Sartomer (Guangzhou) Chemical Co., Ltd.) Component (b) 25 parts dicyclopentenyl acrylate Component (c) 15 parts isotridecyl methacrylate Component (d) 2 parts ethoxylated bisphenol A diacrylate Component (e) 1.5 parts 1-hydroxycyclohexyl phenyl ketone Component (f) 31.5 parts squalane

[0035] All parts in the above table are parts by mass, based on 100 parts by mass of the photocured layer;

[0036] Select an appropriate amount of a single-component cyanoacrylate adhesive and set it aside;

[0037] (ii) Mixing: Evenly mix component (a), component (b), component (c), component (d), component (e) and component (f) to obtain a light-cured base coating for later use;

[0038] (iii) Initial coating: Apply the reserved light-curing base coating glue on the intelligent dimming automobile membrane electrode to form the initial light-curing base coating;

[0039] ㈣. Photocuring: The photocurable bottom film applied on the smart dimming automobile membrane electrode is irradiated with ultraviolet light for 3 minutes with a light intensity of 100mW / cm2. After the curing is completed, the photocurable bottom layer is obtained;

[0040] The resulting photocured bottom layer had a thickness of 50 μm;

[0041] ㈤. Apply protective film: Apply the reserved single-component cyanoacrylate adhesive on the light-curing base layer, and blow it with hot air at 60°C for 6 minutes to form an adhesive protective surface layer (the thickness of the obtained adhesive protective surface layer is 50μm); the obtained light-curing base layer and adhesive protective surface layer together form a waterproof adhesive for the intelligent dimming automotive membrane electrode.

[0042] Embodiment 2:

[0043] The preparation and application process of the waterproof glue for the intelligent dimming automobile membrane electrode of this embodiment is as follows:

[0044] 1. Prepare the materials: Select the raw materials according to the formula in the following table:

[0045] Component (a) 20 parts CN965NS (polyurethane acrylate, Sartomer (Guangzhou) Chemical Co., Ltd.) Component (b) 40 parts dicyclopentenyl acrylate Component (c) 10 parts isodecyl acrylate Component (d) 2 parts bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide Component (e) 28 parts polydecene

[0046] All parts in the above table are parts by mass, based on 100 parts by mass of the photocured layer;

[0047] Select an appropriate amount of a single-component cyanoacrylate adhesive and set it aside;

[0048] (ii) Mixing: Evenly mix component (a), component (b), component (c), component (d) and component (e) to obtain a light-cured base coating for later use;

[0049] (iii) Initial coating: Apply the reserved light-curing base coating glue on the intelligent dimming automobile membrane electrode to form the initial light-curing base coating;

[0050] ㈣. Photocuring: The photocurable bottom film applied on the smart dimming automobile membrane electrode is irradiated with ultraviolet light for 3 minutes with a light intensity of 100mW / cm2. After the curing is completed, the photocurable bottom layer is obtained;

[0051] The resulting photocured bottom layer had a thickness of 50 μm;

[0052] ㈤. Apply protective film: Apply the reserved single-component cyanoacrylate adhesive on the light-curing base layer, and blow it with hot air at 60°C for 6 minutes to form an adhesive protective surface layer (the thickness of the obtained adhesive protective surface layer is 50μm); the obtained light-curing base layer and adhesive protective surface layer together form a waterproof adhesive for the intelligent dimming automotive membrane electrode.

[0053] The processed smart dimming car film obtained in the above-mentioned Example 1 and Example 2 was pasted on the inner side of the cab sunroof and side window glass of an ordinary car, and a heavy rain mode was simulated. The smart dimming car film was powered on for testing at a safety voltage of 36V to dim the light for one month. During this period, the cab sunroof and side window glass were repeatedly opened and closed 10,000 times. The test results showed that the tested smart dimming car film (electrode) did not suffer from liquid crystal corrosion and circuit short circuit, which indicates that the waterproof glue used for the smart dimming car film electrode of the present invention has good liquid crystal corrosion resistance and water resistance.

[0054] The waterproof adhesive for the intelligent dimming automobile membrane electrode of the present invention can be used for both side windows and sunroofs of various types of automobiles.

Claims

1. A waterproof adhesive for intelligent dimming automotive membrane electrode, characterized in that: From the outside to the inside, it includes an adhesive protective surface layer and a light-curing bottom layer, wherein the adhesive protective surface layer is a single-component cyanoacrylate adhesive layer; and the light-curing bottom layer is a UV acrylic adhesive layer, which includes the following raw material components in mass percentage: UV acrylic compounds 60-90%, Photoinitiator 0.5-2%, Polyolefin and alkane inert ingredients 20-40%, The sum of the mass percentages of the above components is 100%; The polyolefin and alkane inert components are one or more of polydecene, polydodecene, and Cn alkanes with n≥10. When there are two or more, the proportion of each component is equal by weight.

2. The waterproof adhesive for intelligent dimming automotive membrane electrode according to claim 1 is characterized by: The UV acrylic compound is one or two of a UV light-curing prepolymer and a UV light-curing monomer. When there are two, the proportion of each component is equal by weight.

3. The waterproof adhesive for intelligent dimming automotive membrane electrode according to claim 2 is characterized by: The UV light-curing prepolymer is one or two of polyurethane acrylate and epoxy acrylate. When it is two, the proportion of each component is equal by weight.

4. The waterproof adhesive for intelligent dimming automobile membrane electrode according to claim 3 is characterized by: The UV light-curing monomer is one or more of o-phenylphenoxyethyl acrylate, 2-(p-isopropylphenyl-phenoxy)-ethyl acrylate, ethoxyethoxyethyl acrylate, cyclotrimethylolpropane formal acrylate, ethoxylated phenoxy acrylate, stearic acid acrylate, isodecyl acrylate, 2-phenoxyethyl methacrylate, isotridecyl methacrylate, isobornyl acrylate, benzyl acrylate, dicyclopentenyl acrylate, glycidyl methacrylate, 3-hydroxy-2,2-dimethylpropyl-3-hydroxy-2-dimethylpropyl diacrylate, tricyclodecane dimethanol diacrylate, and ethoxylated bisphenol A diacrylate. When there are more than two types, the proportion of each component is equal by mass.

5. The waterproof adhesive for intelligent dimming automobile membrane electrode according to claim 3 is characterized by: The photoinitiator is one or more of 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholine-1-propanone, bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, 2-hydroxy-2-methyl-1-phenylpropanone, ethyl 2,4,6-trimethylbenzoylphenylphosphonate, 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone, and α-hydroxyalkyl phenone. When there are more than two kinds, the proportion of each component is equal by mass.

6. The waterproof adhesive for intelligent dimming automobile membrane electrode according to claim 1 is characterized by: The Cn alkane with n≥10 is squalane.

7. An application method of the waterproof adhesive for the intelligent dimming automobile membrane electrode as claimed in any one of claims 1 to 6, characterized in that: The preparation and application process is as follows: (i) Material preparation: Select the raw material components contained in the cyanoacrylate adhesive and the light-curing base layer according to the mass ratio and set them aside; (ii) Mixing: Mix the raw material components contained in the light-curing base layer to obtain the light-curing base layer coating, which is ready for use; (iii) Initial coating: Apply the reserved light-curing base coating glue on the intelligent dimming automobile membrane electrode to form the initial light-curing base coating; 4. Photocuring: The photocurable bottom film applied on the smart dimming automobile membrane electrode is irradiated with ultraviolet light for 1-5 minutes with a light intensity of 80-150mW / cm2. After the curing is completed, the photocurable bottom layer is obtained; ㈤. Apply protective film: Apply the reserved cyanoacrylate adhesive on the light-curing base layer, and blow it with hot air at 50-70℃ for 1-5min to form an adhesive protective surface layer; the obtained light-curing base layer and adhesive protective surface layer together form a waterproof adhesive for the intelligent dimming automotive membrane electrode.

8. The application method of the waterproof glue for the intelligent dimming automobile membrane electrode according to claim 7 is characterized by: The ultraviolet light irradiation time in the photocuring process is 2-4 minutes, and the light intensity is 90-120mW / cm2; the hot air temperature in the protective film coating process is 55-65°C, and the blowing time is 2-4 minutes.

9. The application method of the waterproof glue for the intelligent dimming automobile membrane electrode according to claim 8, characterized in that: The ultraviolet light irradiation time in the photocuring process is 3 minutes, and the light intensity is 100mW / cm2; the hot air temperature in the protective film coating process is 60°C, and the blowing time is 3 minutes.