An adhesive, its preparation method and its application in a sunshade composite film

Abstract

The present invention relates to the field of sunshade technology. Specifically, it relates to an adhesive, a preparation method thereof, and its application in a sunshade composite film. The adhesive comprises the following components in parts by mass: component A 80-90; component B 9-19; adhesion promoter 0.1-1. The method comprises the following steps: step S1, preparing component A; step S2, preparing component B; step S3, mixing component A, component B and the adhesion promoter. For the application of the adhesive in the sunshade composite film, first, the adhesive is coated on the surface of the PVC film material, and then, the PVF film and the PVC film are hot-pressed and laminated to obtain a composite film, which improves the water resistance, ultraviolet resistance and rubbing resistance of the sunshade composite film.

Description

Technical Field

[0001] The present invention relates to the technical field of sunshading, and specifically, to an adhesive, a preparation method thereof, and an application thereof in a sunshading composite film. Background Art

[0002] As a traditional sunshading material, polyvinyl chloride (PVC) sunshading film is widely used in buildings such as gymnasiums, exhibition halls, and outdoor viewing platforms. However, the PVC film has weak self-cleaning ability, and poor aging resistance and low-temperature resistance. To improve the comprehensive performance of the PVC film, a fluorine-containing film material such as polyvinyl fluoride (PVF) film is often laminated on its surface. The composite sunshading film of PVC and PVF combines the low cost and good mechanical properties of PVC with the excellent weather resistance, anti-fouling and self-cleaning properties of the PVF film material, and is becoming a new type of building sunshading material.

[0003] Although the composite sunshading film of PVC and PVF has excellent performance, there are still great technical difficulties in its preparation. First of all, the PVC soft film usually contains a large amount of plasticizer, and the plasticizer is easy to migrate to the interface during the long-term use of the composite film, affecting the bonding performance. Due to the presence of fluorine elements, the surface free energy of the fluorine-containing film is relatively low, and it is difficult for conventional polymers to wet well on its surface and then achieve bonding. Therefore, developing a high-performance adhesive to achieve good bonding between PVC and PVF film materials is a research hotspot of the composite film.

[0004] Patent CN109762505A discloses a reaction-type polyurethane hot melt adhesive modified with a tertiary amine group-containing polyacrylic resin and its preparation. By introducing a tertiary amine group-containing polyacrylic resin with a relatively high glass transition temperature into the reaction-type polyurethane hot melt adhesive, the initial bonding strength of the hot melt adhesive after sizing and the bonding performance to non-polar plastics and metal substrates are greatly improved. However, the tertiary amine group is relatively hydrophilic, and the ester bond contained in the main chain of the polyurethane hot melt adhesive is easy to hydrolyze in a high-temperature and humid environment. Therefore, the long-term water resistance of the product still needs to be further improved.

[0005] Patent CN108587530B discloses an aqueous adhesive for PVC furniture film / PVF plastic film and its preparation method. The adhesive is composed of a fluorinated poly(methyl methacrylate-methyl acrylate-methylene succinic acid) bonding resin and auxiliaries such as a wetting agent. The bonding performance to the PVF film is improved by fluorination modification of the bonding resin, but the resin is prepared by emulsion polymerization, and the residual small molecule emulsifier in the adhesive layer may have an adverse effect on the bonding of the sample and the long-term water resistance.

[0006] As a building sunshading material, in addition to the initial bonding performance, water resistance, ultraviolet resistance, rub resistance, etc. during long-term outdoor use are also extremely important performance in the actual application process. There are few systematic studies on the above performances for the existing adhesives that can be applied to PVC and PVF films.

[0007] Based on the above analysis, it is very important to provide an adhesive with excellent water resistance and rub resistance during long-term outdoor use. Summary of the Invention

[0008] The object of the present invention is to provide an adhesive, a preparation method thereof and its application in a sunshade composite film to solve the above problems, and improve the water resistance, ultraviolet resistance and rub resistance of the sunshade composite film.

[0009] To achieve the above object, the present invention discloses an adhesive, which comprises the following components in parts by mass:

[0010] Component A 80 - 90;

[0011] Component B 9 - 19;

[0012] Adhesion promoter 0.1 - 1;

[0013] Wherein:

[0014] Component A includes a first initiator solution and acrylate monomers, epoxy monomers, and fluorine-containing monomers with a mass ratio of 65 - 90:5 - 20:5 - 15; by mass percentage, the first initiator solution includes 5 - 10% of a first initiator and 90 - 95% of a first solvent, and the addition amount of the first initiator is 0.5 - 2.0% of the total mass of the acrylate monomers, epoxy monomers, and fluorine-containing monomers;

[0015] Component B includes a second initiator solution and acrylate monomers, tertiary amine monomers, and hydroxyl monomers with a mass ratio of 60 - 85:5 - 10:10 - 30; the second initiator solution includes 5 - 10% of a second initiator and 90 - 95% of a second solvent, and the addition amount of the second initiator is 0.5 - 2.0% of the total mass of the acrylate monomers, tertiary amine monomers, and hydroxyl monomers.

[0016] Preferably, in Component A, the acrylate monomers are selected from at least one of methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, isooctyl (meth)acrylate, cyclohexyl (meth)acrylate, and isobornyl (meth)acrylate; the epoxy monomers are selected from at least one of glycidyl methacrylate and glycidyl acrylate; the fluorine-containing monomers are selected from at least one of hexafluorobutyl (meth)acrylate, tridecafluorooctyl (meth)acrylate, and trifluoroethyl (meth)acrylate.

[0017] Preferably, in component B, the acrylate monomer is selected from at least one of methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, isooctyl (meth)acrylate, cyclohexyl (meth)acrylate, and isobornyl (meth)acrylate; the tertiary amine monomer is selected from at least one of diethylaminoethyl (meth)acrylate and dimethylaminoethyl (meth)acrylate; the hydroxyl monomer is selected from at least one of hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, and hydroxybutyl (meth)acrylate.

[0018] Preferably, the first initiator is selected from at least one of azobisisobutyronitrile, azobisisoheptonitrile, benzoyl peroxide, tert-butyl hydroperoxide, and hydrogen peroxide; the first solvent is selected from at least one of toluene, ethyl acetate, butyl acetate, and isopropanol.

[0019] Preferably, the second initiator is selected from at least one of azobisisobutyronitrile, azobisisoheptonitrile, benzoyl peroxide, tert-butyl hydroperoxide, and hydrogen peroxide; the second solvent is selected from at least one of toluene, ethyl acetate, butyl acetate, and isopropanol.

[0020] Preferably, the adhesion promoter is selected from at least one of aminopropyltriethoxysilane, aminopropyltrimethoxysilane, 2-aminoethyl-aminopropyltrimethoxysilane, diethylenetriaminopropyltrimethoxysilane, and aminoethylaminopropylmethyldimethoxysilane.

[0021] The preparation method of the adhesive as described above includes the following steps:

[0022] Step S1: Mix the acrylate monomer, epoxy monomer, and fluorine-containing monomer evenly to obtain a first monomer mixture; dissolve the first initiator in the first solvent to obtain a first initiator solution; add the third solvent to the bottom of the reaction kettle, heat, and dropwise add the first monomer mixture and the first initiator solution. After the dropping is completed, keep the temperature constant to obtain component A.

[0023] Step S2: Mix the acrylate monomer, tertiary amine monomer, and hydroxyl monomer evenly to obtain a second monomer mixture; dissolve the second initiator in the second solvent to obtain a second initiator solution; add the fourth solvent to the bottom of the reaction kettle, heat, and dropwise add the second monomer mixture and the second initiator solution. After the dropping is completed, keep the temperature constant to obtain component B.

[0024] Step S3: Mix component A, component B, and the adhesion promoter, add the fifth solvent to adjust the solid content, and mix evenly to obtain the adhesive.

[0025] Preferably, the third solvent is toluene or ethyl acetate; the fourth solvent is toluene or ethyl acetate; the fifth solvent is toluene or ethyl acetate.

[0026] Preferably, in step S1, the addition amount of the third solvent at the bottom of the reaction kettle is based on the solid content of component A reaching 20 - 50%, the heating temperature is 60 - 85°C, the heating time is 1.5 - 2.5 h, and the heat preservation time is 1 - 2 h;

[0027] In step S2, the addition amount of the fourth solvent at the bottom of the reaction kettle is based on the solid content of component B reaching 20 - 50%, the heating temperature is 60 - 85°C, the heating time is 1.5 - 2.5 h, and the heat preservation time is 1 - 2 h;

[0028] In step S3, the addition amount of the fifth solvent is based on the solid content of the adhesive reaching 10 - 30%.

[0029] The application of the adhesive as described above in the sunshade composite film: The adhesive as described above is coated on the surface of the PVC film material, and the coating amount is 20 - 25 g / m 2 , after drying at 55 - 65°C for 1.5 - 2.5 min, the PVF film and the PVC film are hot - pressed and laminated to obtain a composite film, and the composite film is placed in an oven at 50 - 60°C and cured for 1 - 2 days.

[0030] In summary, the beneficial effects of the present invention are as follows: 1. The main chain of the adhesive resin prepared in this application is a saturated carbon - carbon chain, which has good chemical stability. The fluorine - containing functional group is introduced into the side chain, which not only reduces the surface energy of the adhesive, improves the wettability to the PVF film material, but also significantly reduces the hydrophilicity of the copolymer, which is beneficial to the improvement of the water resistance and ultraviolet resistance of the product.

[0031] 2. Through free - radical copolymerization, tertiary amine and hydroxyl functional groups are introduced into component B of the synthesized adhesive in this application. It can not only form hydrogen bonds and ionic bond interactions with the polar functional groups on the substrate surface, but also cross - link with component A and epoxy functional groups, greatly improving the adhesion and rub - resistance of the adhesive.

[0032] 3. Component A, which is the main body in this application, has a relatively high glass transition temperature, and the epoxy functional group can cross - link with various groups such as hydroxyl and tertiary amine, which is beneficial to improving the structural stability of the adhesive and inhibiting the migration of plasticizers; while component B has a relatively low glass transition temperature. During the lamination and curing process of the composite film, component B has a higher movement ability, which improves the rate of cross - link functional group contact and cross - link reaction, and improves production efficiency. In addition, the interpenetrating cross - link of component B with a low glass transition temperature in component A with a high glass transition temperature is beneficial to improving the flexibility of the adhesive layer and its rub - resistance. Brief Description of the Drawings

[0033] Figure 1 It is a schematic diagram of the composite film prepared by an adhesive of the present invention after being rubbed and bent. Detailed Embodiments

[0034] The following further describes in detail the specific embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0035] Embodiment 1, An adhesive, comprising the following components in parts by mass:

[0036] Component A 80;

[0037] Component B 14;

[0038] Adhesion promoter 1;

[0039] Wherein:

[0040] Component A includes a first initiator solution and acrylate monomers, epoxy monomers, and fluorine-containing monomers with a mass ratio of 65:12:15; by mass percentage, the first initiator solution includes 5% of the first initiator and 95% of the first solvent, and the addition amount of the first initiator is 0.5% of the total mass of the acrylate monomers, epoxy monomers, and fluorine-containing monomers.

[0041] In Component A, the acrylate monomer is selected from methyl (meth)acrylate; the epoxy monomer is selected from glycidyl methacrylate; the fluorine-containing monomer is selected from hexafluorobutyl (meth)acrylate.

[0042] The first initiator is selected from azobisisobutyronitrile; the first solvent is selected from toluene.

[0043] The glass transition temperature of Component A is 70 - 95°C.

[0044] Component B includes a second initiator solution and acrylate monomers, tertiary amine monomers, and hydroxyl monomers with a mass ratio of 60:8:30; the second initiator solution includes 5% of the second initiator and 95% of the second solvent, and the addition amount of the second initiator is 0.5% of the total mass of the acrylate monomers, tertiary amine monomers, and hydroxyl monomers.

[0045] In Component B, the acrylate monomer is selected from methyl (meth)acrylate; the tertiary amine monomer is selected from diethylaminoethyl (meth)acrylate; the hydroxyl monomer is selected from hydroxyethyl (meth)acrylate.

[0046] The second initiator is selected from azobisisobutyronitrile; the second solvent is selected from toluene.

[0047] The glass transition temperature of Component B is 20 - 40°C.

[0048] The adhesion promoter is selected from aminopropyltriethoxysilane.

[0049] Embodiment 2, A preparation method of the adhesive as described in Embodiment 1, comprising the following steps:

[0050] Step S1, Mix acrylate monomers, epoxy monomers, and fluorine-containing monomers uniformly to obtain a first monomer mixture; dissolve a first initiator in a first solvent to obtain a first initiator solution; add a third solvent to the bottom of the reaction kettle, heat it, and dropwise add the first monomer mixture and the first initiator solution. After the dropping is completed, keep it warm to obtain Component A. In Step S1, the addition amount of the third solvent at the bottom of the reaction kettle is based on the solid content of Component A reaching 20%. The heating temperature is 60 °C, the heating time is 1.5 h, and the holding time is 1 h.

[0051] Step S2, Mix acrylate monomers, tertiary amine monomers, and hydroxyl monomers uniformly to obtain a second monomer mixture; dissolve a second initiator in a second solvent to obtain a second initiator solution; add a fourth solvent to the bottom of the reaction kettle, heat it, and dropwise add the second monomer mixture and the second initiator solution. After the dropping is completed, keep it warm to obtain Component B. In Step S2, the addition amount of the fourth solvent at the bottom of the reaction kettle is based on the solid content of Component B reaching 20%. The heating temperature is 60 °C, the heating time is 1.5 h, and the holding time is 1 h.

[0052] Step S3, Mix Component A, Component B, and an adhesion promoter, add a fifth solvent to adjust the solid content, and mix uniformly to obtain an adhesive. In Step S3, the addition amount of the fifth solvent is based on the solid content of the adhesive reaching 10%.

[0053] The third solvent is toluene; the fourth solvent is toluene; the fifth solvent is toluene.

[0054] Example 3, Application of the adhesive as described in Example 1 in a sunshade composite film. Coat the adhesive as described in Example 1 on the surface of a PVC film material. The coating amount is 20 g / m 2 , After drying at 55 °C for 1.5 min, thermally press and bond a PVF film and a PVC film to obtain a composite film. Place the composite film in an oven at 50 °C and cure it for 1 day.

[0055] Example 4, An adhesive, comprising the following components in parts by mass:

[0056] Component A 85;

[0057] Component B 19;

[0058] Adhesion promoter 0.1;

[0059] Among them:

[0060] Component A includes a first initiator solution and acrylate monomers, epoxy monomers, and fluorine-containing monomers with a mass ratio of 75:20:5; by mass percentage, the first initiator solution includes 8% of the first initiator and 92% of the first solvent. The addition amount of the first initiator is 1.5% of the total mass of the acrylate monomers, epoxy monomers, and fluorine-containing monomers.

[0061] In Component A, the acrylate monomer is selected as ethyl (meth)acrylate; the epoxy monomer is selected as glycidyl acrylate; the fluorine-containing monomer is selected as tridecafluorooctyl (meth)acrylate.

[0062] The first initiator is selected as 2,2'-azobis(2-methylheptanenitrile); the first solvent is selected as ethyl acetate.

[0063] The glass transition temperature of Component A is 70 - 95 °C.

[0064] Component B includes a second initiator solution and acrylate monomers, tertiary amine monomers, and hydroxyl monomers with a mass ratio of 75:10:10; the second initiator solution includes 8% of the second initiator and 92% of the second solvent, and the addition amount of the second initiator is 1.5% of the total mass of the acrylate monomers, tertiary amine monomers, and hydroxyl monomers.

[0065] In Component B, the acrylate monomer is selected as ethyl (meth)acrylate; the tertiary amine monomer is selected as dimethylaminoethyl (meth)acrylate; the hydroxyl monomer is selected as hydroxypropyl (meth)acrylate.

[0066] The second initiator is selected as 2,2'-azobis(2-methylheptanenitrile); the second solvent is selected as ethyl acetate.

[0067] The glass transition temperature of Component B is 20 - 40 °C.

[0068] The adhesion promoter is selected as aminopropyltrimethoxysilane.

[0069] Example 5, the preparation method of the adhesive as described in Example 4, includes the following steps:

[0070] Step S1, mix the acrylate monomer, epoxy monomer, and fluorine-containing monomer evenly to obtain a first monomer mixture; dissolve the first initiator in the first solvent to obtain a first initiator solution; add a third solvent to the bottom of the reaction kettle, heat, and drip the first monomer mixture and the first initiator solution. After the dripping is completed, keep it warm to obtain Component A; in Step S1, the addition amount of the third solvent at the bottom of the reaction kettle is based on the solid content of Component A reaching 35%, the heating temperature is 75 °C, the heating time is 2 h, and the insulation time is 1.5 h.

[0071] Step S2, mix the acrylate monomer, tertiary amine monomer, and hydroxyl monomer evenly to obtain a second monomer mixture; dissolve the second initiator in the second solvent to obtain a second initiator solution; add a fourth solvent to the bottom of the reaction kettle, heat, and drip the second monomer mixture and the second initiator solution. After the dripping is completed, keep it warm to obtain Component B; in Step S2, the addition amount of the fourth solvent at the bottom of the reaction kettle is based on the solid content of Component B reaching 35%, the heating temperature is 75 °C, the heating time is 2 h, and the insulation time is 1.5 h.

[0072] Step S3: Mix component A, component B and the adhesion promoter, add the fifth solvent to adjust the solid content, and mix evenly to obtain the adhesive. In step S3, the addition amount of the fifth solvent is based on the solid content of the adhesive reaching 20%.

[0073] The third solvent is ethyl acetate; the fourth solvent is ethyl acetate; the fifth solvent is ethyl acetate.

[0074] Example 6: Application of the adhesive as described in Example 4 in the sunshade composite film. Coat the adhesive as described in Example 4 on the surface of the PVC film material, with a coating amount of 22 g / m2. After drying at 60°C for 2 minutes, thermally press and bond the PVF film and the PVC film to obtain a composite film. Place the composite film in an oven at 55°C and cure for 1.5 days.

[0075] Example 7: An adhesive, comprising the following components in parts by mass:

[0076] Component A 90;

[0077] Component B 9;

[0078] Adhesion promoter 0.5;

[0079] Wherein:

[0080] Component A includes a first initiator solution and acrylate monomers, epoxy monomers, and fluorine-containing monomers with a mass ratio of 90:5:10; by mass percentage, the first initiator solution includes 10% of the first initiator and 90% of the first solvent, and the addition amount of the first initiator is 2.0% of the total mass of the acrylate monomers, epoxy monomers, and fluorine-containing monomers.

[0081] In component A, the acrylate monomer is selected from butyl (meth)acrylate; the epoxy monomer is selected from glycidyl methacrylate; the fluorine-containing monomer is selected from trifluoroethyl (meth)acrylate.

[0082] The first initiator is selected from benzoyl peroxide; the first solvent is selected from butyl acetate.

[0083] The glass transition temperature of component A is 70 - 95°C.

[0084] Component B includes a second initiator solution and acrylate monomers, tertiary amine monomers, and hydroxyl monomers with a mass ratio of 85:5:20; the second initiator solution includes 10% of the second initiator and 90% of the second solvent, and the addition amount of the second initiator is 2.0% of the total mass of the acrylate monomers, tertiary amine monomers, and hydroxyl monomers.

[0085] In component B, the acrylate monomer is selected from butyl (meth)acrylate; the tertiary amine monomer is selected from diethylaminoethyl (meth)acrylate; the hydroxyl monomer is selected from hydroxybutyl (meth)acrylate.

[0086] The second initiator is benzoyl peroxide; the second solvent is butyl acetate.

[0087] The glass transition temperature of component B is 20 - 40 °C.

[0088] The adhesion promoter is 2 - aminoethyl - aminopropyltrimethoxysilane.

[0089] Example 8, the preparation method of the adhesive as described in Example 7, includes the following steps:

[0090] Step S1, mix acrylate monomers, epoxy monomers and fluorine - containing monomers evenly to obtain a first monomer mixture; dissolve the first initiator in the first solvent to obtain a first initiator solution; add the third solvent to the bottom of the reaction kettle, heat, and drop - wise add the first monomer mixture and the first initiator solution. After the dropping is completed, keep warm to obtain component A. In step S1, the addition amount of the third solvent at the bottom of the reaction kettle is based on the solid content of component A reaching 50%. The heating temperature is 85 °C, the heating time is 2.5 h, and the holding time is 2 h.

[0091] Step S2, mix acrylate monomers, tertiary amine monomers and hydroxyl monomers evenly to obtain a second monomer mixture; dissolve the second initiator in the second solvent to obtain a second initiator solution; add the fourth solvent to the bottom of the reaction kettle, heat, and drop - wise add the second monomer mixture and the second initiator solution. After the dropping is completed, keep warm to obtain component B. In step S2, the addition amount of the fourth solvent at the bottom of the reaction kettle is based on the solid content of component B reaching 50%. The heating temperature is 85 °C, the heating time is 2.5 h, and the holding time is 2 h.

[0092] Step S3, mix component A, component B and the adhesion promoter, add the fifth solvent to adjust the solid content, and mix evenly to obtain the adhesive. In step S3, the addition amount of the fifth solvent is based on the solid content of the adhesive reaching 30%.

[0093] The third solvent is toluene; the fourth solvent is toluene; the fifth solvent is toluene.

[0094] Example 9, the application of the adhesive as described in Example 7 in a sun - shading composite film. Coat the adhesive as described in Example 7 on the surface of the PVC film material, with a coating amount of 25 g / m2. After drying at 65 °C for 2.5 min, thermally press and laminate the PVF film and the PVC film to obtain a composite film. Place the composite film in an oven at 60 °C and cure for 2 days.

[0095] Example 10, an adhesive, including the following components in parts by mass:

[0096] Component A 80;

[0097] Component B 14;

[0098] Adhesion promoter 1;

[0099] Wherein:

[0100] Component A includes a first initiator solution and acrylate monomers, epoxy monomers, and fluorine-containing monomers with a mass ratio of 65:12:15; by mass percentage, the first initiator solution includes 5% of the first initiator and 95% of the first solvent, and the addition amount of the first initiator is 0.5% of the total mass of the acrylate monomers, epoxy monomers, and fluorine-containing monomers.

[0101] In Component A, the acrylate monomer is selected from isooctyl (meth)acrylate; the epoxy monomer is selected from glycidyl methacrylate; the fluorine-containing monomer is selected from hexafluorobutyl (meth)acrylate.

[0102] The first initiator is selected from tert-butyl hydroperoxide; the first solvent is selected from isopropanol.

[0103] The glass transition temperature of Component A is 70 - 95 °C.

[0104] Component B includes a second initiator solution and acrylate monomers, tertiary amine monomers, and hydroxyl monomers with a mass ratio of 60:8:30; the second initiator solution includes 5% of the second initiator and 95% of the second solvent, and the addition amount of the second initiator is 0.5% of the total mass of the acrylate monomers, tertiary amine monomers, and hydroxyl monomers.

[0105] In Component B, the acrylate monomer is selected from isooctyl (meth)acrylate; the tertiary amine monomer is selected from diethylaminoethyl (meth)acrylate; the hydroxyl monomer is selected from hydroxyethyl (meth)acrylate.

[0106] The second initiator is selected from tert-butyl hydroperoxide; the second solvent is selected from isopropanol.

[0107] The glass transition temperature of Component B is 20 - 40 °C.

[0108] The adhesion promoter is selected from diethylenetriaminopropyltrimethoxysilane.

[0109] Example 11, the preparation method of the adhesive as described in Example 10, includes the following steps:

[0110] Step S1, mix the acrylate monomers, epoxy monomers, and fluorine-containing monomers evenly to obtain a first monomer mixture; dissolve the first initiator in the first solvent to obtain a first initiator solution; add a third solvent to the bottom of the reaction kettle, heat, and dropwise add the first monomer mixture and the first initiator solution, and keep warm after the dropping is completed to obtain Component A; in Step S1, the addition amount of the third solvent at the bottom of the reaction kettle is based on the solid content of Component A reaching 20%, the heating temperature is 60 °C, the heating time is 1.5 h, and the insulation time is 1 h.

[0111] Step S2: Mix the acrylate monomer, tertiary amine monomer and hydroxyl monomer evenly to obtain the second monomer mixture; dissolve the second initiator in the second solvent to obtain the second initiator solution; add the fourth solvent to the bottom of the reaction kettle, heat it, and drip the second monomer mixture and the second initiator solution. After the dripping is completed, keep it warm to obtain Component B. In Step S2, the addition amount of the fourth solvent at the bottom of the reaction kettle is based on the solid content of Component B reaching 20%. The heating temperature is 60°C, the heating time is 1.5 h, and the heat preservation time is 1 h.

[0112] Step S3: Mix Component A, Component B and the adhesion promoter, add the fifth solvent to adjust the solid content, and mix evenly to obtain the adhesive. In Step S3, the addition amount of the fifth solvent is based on the solid content of the adhesive reaching 10%.

[0113] The third solvent is toluene; the fourth solvent is toluene; the fifth solvent is toluene.

[0114] Example 12: Application of the adhesive as described in Example 10 in the sunshade composite film. Coat the adhesive as described in Example 10 on the surface of the PVC film material, and the coating amount is 20 g / m 2 , after drying at 55°C for 1.5 min, thermally press and bond the PVF film and the PVC film to obtain the composite film, and place the composite film in an oven at 50°C for 1 day of curing.

[0115] Example 13: An adhesive, comprising the following components in parts by mass:

[0116] Component A 80;

[0117] Component B 14;

[0118] Adhesion promoter 1;

[0119] Wherein:

[0120] Component A includes the first initiator solution and acrylate monomer, epoxy monomer, and fluorine-containing monomer with a mass ratio of 65:12:15; by mass percentage, the first initiator solution includes 5% of the first initiator and 95% of the first solvent, and the addition amount of the first initiator is 0.5% of the total mass of the acrylate monomer, epoxy monomer, and fluorine-containing monomer.

[0121] In Component A, the acrylate monomer is cyclohexyl (meth)acrylate; the epoxy monomer is glycidyl methacrylate; the fluorine-containing monomer is hexafluorobutyl (meth)acrylate.

[0122] The first initiator is hydrogen peroxide; the first solvent is toluene.

[0123] The glass transition temperature of Component A is 70 - 95°C.

[0124] Component B includes a second initiator solution and acrylate monomers, tertiary amine monomers, and hydroxyl monomers with a mass ratio of 60:8:30; the second initiator solution includes 5% of the second initiator and 95% of the second solvent, and the addition amount of the second initiator is 0.5% of the total mass of the acrylate monomers, tertiary amine monomers, and hydroxyl monomers.

[0125] In Component B, the acrylate monomer is cyclohexyl (meth)acrylate; the tertiary amine monomer is diethylaminoethyl (meth)acrylate; the hydroxyl monomer is 2-hydroxyethyl (meth)acrylate.

[0126] The second initiator is hydrogen peroxide; the second solvent is toluene.

[0127] The glass transition temperature of Component B is 20 - 40 °C.

[0128] The adhesion promoter is aminoethyl aminopropyl methyl dimethoxysilane.

[0129] Example 14, the preparation method of the adhesive as described in Example 13, includes the following steps:

[0130] Step S1, mix the acrylate monomers, epoxy monomers, and fluorine-containing monomers evenly to obtain a first monomer mixture; dissolve the first initiator in the first solvent to obtain a first initiator solution; add the third solvent to the bottom of the reaction kettle, heat, and dropwise add the first monomer mixture and the first initiator solution. After the dropping is completed, keep warm to obtain Component A; in Step S1, the addition amount of the third solvent at the bottom of the reaction kettle is based on the solid content of Component A reaching 20%, the heating temperature is 60 °C, the heating time is 1.5 h, and the holding time is 1 h.

[0131] Step S2, mix the acrylate monomers, tertiary amine monomers, and hydroxyl monomers evenly to obtain a second monomer mixture; dissolve the second initiator in the second solvent to obtain a second initiator solution; add the fourth solvent to the bottom of the reaction kettle, heat, and dropwise add the second monomer mixture and the second initiator solution. After the dropping is completed, keep warm to obtain Component B; in Step S2, the addition amount of the fourth solvent at the bottom of the reaction kettle is based on the solid content of Component B reaching 20%, the heating temperature is 60 °C, the heating time is 1.5 h, and the holding time is 1 h.

[0132] Step S3, mix Component A, Component B, and the adhesion promoter, add the fifth solvent to adjust the solid content, and mix evenly to obtain the adhesive; in Step S3, the addition amount of the fifth solvent is based on the solid content of the adhesive reaching 10%.

[0133] The third solvent is toluene; the fourth solvent is toluene; the fifth solvent is toluene.

[0134] Example 15, Application of the adhesive as described in Example 13 in a sunshade composite film. The adhesive as described in Example 13 was coated on the surface of a PVC film material, and the coating amount was 20 g / m 2 , After drying at 55 °C for 1.5 min, the PVF film and the PVC film were hot-pressed and laminated to obtain a composite film, and the composite film was placed in an oven at 50 °C and cured for 1 day.

[0135] Example 16, An adhesive, comprising the following components in parts by mass:

[0136] Component A 80;

[0137] Component B 14;

[0138] Adhesion promoter 1;

[0139] Wherein:

[0140] Component A includes a first initiator solution and acrylate monomers, epoxy monomers, and fluorine-containing monomers with a mass ratio of 65:12:15; by mass percentage, the first initiator solution includes 5% of the first initiator and 95% of the first solvent, and the addition amount of the first initiator is 0.5% of the total mass of the acrylate monomers, epoxy monomers, and fluorine-containing monomers.

[0141] In Component A, the acrylate monomer is isobornyl (meth)acrylate; the epoxy monomer is glycidyl methacrylate; the fluorine-containing monomer is hexafluorobutyl (meth)acrylate.

[0142] The first initiator is azobisisobutyronitrile; the first solvent is toluene.

[0143] The glass transition temperature of Component A is 70 - 95 °C.

[0144] Component B includes a second initiator solution and acrylate monomers, tertiary amine monomers, and hydroxyl monomers with a mass ratio of 60:8:30; the second initiator solution includes 5% of the second initiator and 95% of the second solvent, and the addition amount of the second initiator is 0.5% of the total mass of the acrylate monomers, tertiary amine monomers, and hydroxyl monomers.

[0145] In Component B, the acrylate monomer is isobornyl (meth)acrylate; the tertiary amine monomer is diethylaminoethyl (meth)acrylate; the hydroxyl monomer is hydroxyethyl (meth)acrylate.

[0146] The second initiator is azobisisobutyronitrile; the second solvent is toluene.

[0147] The glass transition temperature of Component B is 20 - 40 °C.

[0148] The adhesion promoter is aminoethylaminopropylmethyldimethoxysilane.

[0149] Example 17, the preparation method of the adhesive as described in Example 16, comprising the following steps:

[0150] Step S1, mix acrylate monomers, epoxy monomers and fluorine-containing monomers evenly to obtain a first monomer mixture; dissolve a first initiator in a first solvent to obtain a first initiator solution; add a third solvent to the bottom of the reaction kettle, heat, and dropwise add the first monomer mixture and the first initiator solution. After the dropping is completed, keep warm to obtain component A. In step S1, the addition amount of the third solvent at the bottom of the reaction kettle is based on the solid content of component A reaching 20%. The heating temperature is 60 °C, the heating time is 1.5 h, and the heat preservation time is 1 h.

[0151] Step S2, mix acrylate monomers, tertiary amine monomers and hydroxyl monomers evenly to obtain a second monomer mixture; dissolve a second initiator in a second solvent to obtain a second initiator solution; add a fourth solvent to the bottom of the reaction kettle, heat, and dropwise add the second monomer mixture and the second initiator solution. After the dropping is completed, keep warm to obtain component B. In step S2, the addition amount of the fourth solvent at the bottom of the reaction kettle is based on the solid content of component B reaching 20%. The heating temperature is 60 °C, the heating time is 1.5 h, and the heat preservation time is 1 h.

[0152] Step S3, mix component A, component B and an adhesion promoter, add a fifth solvent to adjust the solid content, and mix evenly to obtain the adhesive. In step S3, the addition amount of the fifth solvent is based on the solid content of the adhesive reaching 10%.

[0153] The third solvent is toluene; the fourth solvent is toluene; the fifth solvent is toluene.

[0154] Example 18, the application of the adhesive as described in Example 16 in a sunshade composite film. Coat the adhesive as described in Example 16 on the surface of the PVC film material, with a coating amount of 20 g / m 2 , after drying at 55 °C for 1.5 min, thermally press and laminate the PVF film and the PVC film to obtain a composite film, and place the composite film in an oven at 50 °C for curing for 1 day.

[0155] Comparative Example 1: An adhesive, comprising the following components in parts by mass:

[0156] Component A 80;

[0157] Adhesion promoter 1;

[0158] Among them:

[0159] Component A includes a first initiator solution and acrylate monomers, epoxy monomers, and fluorine-containing monomers with a mass ratio of 65:12:15; by mass percentage, the first initiator solution includes 5% of the first initiator and 95% of the first solvent, and the addition amount of the first initiator is 0.5% of the total mass of the acrylate monomers, epoxy monomers, and fluorine-containing monomers.

[0160] Among the components of A, the acrylate monomer is selected from methyl (meth)acrylate; the epoxy monomer is selected from glycidyl methacrylate; the fluorine-containing monomer is selected from hexafluorobutyl (meth)acrylate.

[0161] The first initiator is selected from azobisisobutyronitrile; the first solvent is selected from toluene.

[0162] The glass transition temperature of Component A is 70 - 95 °C.

[0163] The adhesion promoter is selected from aminopropyltriethoxysilane.

[0164] As for the preparation method of the adhesive as described in Comparative Example 1, it includes the following steps:

[0165] Step S1, mix the acrylate monomers, epoxy monomers, and fluorine-containing monomers evenly to obtain a first monomer mixture; dissolve the first initiator in the first solvent to obtain a first initiator solution; add a third solvent to the bottom of the reaction kettle, heat it, and drip the first monomer mixture and the first initiator solution. After the dripping is completed, keep it warm to obtain Component A; in Step S1, the addition amount of the third solvent at the bottom of the reaction kettle is based on the solid content of Component A reaching 20%, the heating temperature is 60 °C, the heating time is 1.5 h, and the insulation time is 1 h.

[0166] Step S2, mix Component A with the adhesion promoter, add a fifth solvent to adjust the solid content, and mix evenly to obtain the adhesive; in Step S2, the addition amount of the fifth solvent is based on the solid content of the adhesive reaching 10%.

[0167] The third solvent is toluene; the fifth solvent is toluene.

[0168] Regarding the application of the adhesive as described in Comparative Example 1 in the sunshade composite film, apply the adhesive as described in Comparative Example 1 on the surface of the PVC film material, with the coating amount being 20 g / m 2 , after drying at 55 °C for 1.5 min, thermally press and bond the PVF film and the PVC film to obtain a composite film, and place the composite film in an oven at 50 °C for 1 day of curing.

[0169] Comparative Example 2: An adhesive, including the following components in parts by mass:

[0170] Component A 80;

[0171] Component B 14;

[0172] Wherein:

[0173] Component A includes a first initiator solution and acrylate monomers, epoxy monomers, and fluorine-containing monomers with a mass ratio of 65:12:15; by mass percentage, the first initiator solution includes 5% of a first initiator and 95% of a first solvent, and the addition amount of the first initiator is 0.5% of the total mass of the acrylate monomers, epoxy monomers, and fluorine-containing monomers.

[0174] In Component A, the acrylate monomer is selected from methyl (meth)acrylate; the epoxy monomer is selected from glycidyl methacrylate; the fluorine-containing monomer is selected from hexafluorobutyl (meth)acrylate.

[0175] The first initiator is selected from azobisisobutyronitrile; the first solvent is selected from toluene.

[0176] The glass transition temperature of Component A is 70 - 95 °C.

[0177] Component B includes a second initiator solution and acrylate monomers, tertiary amine monomers, and hydroxyl monomers with a mass ratio of 60:8:30; the second initiator solution includes 5% of a second initiator and 95% of a second solvent, and the addition amount of the second initiator is 0.5% of the total mass of the acrylate monomers, tertiary amine monomers, and hydroxyl monomers.

[0178] In Component B, the acrylate monomer is selected from methyl (meth)acrylate; the tertiary amine monomer is selected from diethylaminoethyl (meth)acrylate; the hydroxyl monomer is selected from hydroxyethyl (meth)acrylate.

[0179] The second initiator is selected from azobisisobutyronitrile; the second solvent is selected from toluene.

[0180] The glass transition temperature of Component B is 20 - 40 °C.

[0181] As for the preparation method of the adhesive as described in Comparative Example 2, it includes the following steps:

[0182] Step S1, mix the acrylate monomers, epoxy monomers, and fluorine-containing monomers evenly to obtain a first monomer mixture; dissolve the first initiator in the first solvent to obtain a first initiator solution; add a third solvent to the bottom of the reaction kettle, heat, and dropwise add the first monomer mixture and the first initiator solution, and keep warm after the dropping is completed to obtain Component A; in Step S1, the addition amount of the third solvent at the bottom of the reaction kettle is based on the solid content of Component A reaching 20%, the heating temperature is 60 °C, the heating time is 1.5 h, and the insulation time is 1 h.

[0183] Step S2: Mix the acrylate monomer, tertiary amine monomer and hydroxyl monomer evenly to obtain a second monomer mixture; dissolve the second initiator in the second solvent to obtain a second initiator solution; add the fourth solvent to the bottom of the reaction kettle, heat it, and dropwise add the second monomer mixture and the second initiator solution. After the dropping is completed, keep the temperature constant to obtain Component B. In Step S2, the addition amount of the fourth solvent at the bottom of the reaction kettle is based on the solid content of Component B reaching 20%. The heating temperature is 60°C, the heating time is 1.5 h, and the heat preservation time is 1 h.

[0184] Step S3: Mix Component A and Component B, add the fifth solvent to adjust the solid content, and mix evenly to obtain the adhesive. In Step S3, the addition amount of the fifth solvent is based on the solid content of the adhesive reaching 10%.

[0185] The third solvent is toluene; the fourth solvent is toluene; the fifth solvent is toluene.

[0186] Regarding the application of the adhesive as described in Comparative Example 2 in the sunshade composite film, apply the adhesive as described in Comparative Example 2 on the surface of the PVC film material, with the coating amount being 20 g / m 2 , after drying at 55°C for 1.5 min, thermally press and bond the PVF film and the PVC film to obtain a composite film, and place the composite film in an oven at 50°C for curing for 1 day.

[0187] Comparative Example 3: An adhesive, comprising the following components in parts by mass:

[0188] Component A 80;

[0189] Component B 14;

[0190] Adhesion promoter 1;

[0191] Wherein:

[0192] Component A includes a first initiator solution and acrylate monomers and epoxy monomers with a mass ratio of 65:12; by mass percentage, the first initiator solution includes 5% of the first initiator and 95% of the first solvent. The addition amount of the first initiator is 0.5% of the total mass of the acrylate monomers, epoxy monomers, and fluorine-containing monomers.

[0193] In Component A, the acrylate monomer is selected from methyl (meth)acrylate; the epoxy monomer is selected from glycidyl methacrylate.

[0194] The first initiator is selected from azobisisobutyronitrile; the first solvent is selected from toluene.

[0195] The glass transition temperature of Component A is 70 - 95°C.

[0196] Component B comprises a second initiator solution and acrylate monomers, tertiary amine monomers, and hydroxyl monomers with a mass ratio of 60:8:30; the second initiator solution comprises 5% of a second initiator and 95% of a second solvent, and the addition amount of the second initiator is 0.5% of the total mass of the acrylate monomers, tertiary amine monomers, and hydroxyl monomers.

[0197] In Component B, the acrylate monomer is selected from methyl (meth)acrylate; the tertiary amine monomer is selected from diethylaminoethyl (meth)acrylate; the hydroxyl monomer is selected from 2-hydroxyethyl (meth)acrylate.

[0198] The second initiator is selected from azobisisobutyronitrile; the second solvent is selected from toluene.

[0199] The glass transition temperature of Component B is 20 - 40 °C.

[0200] The adhesion promoter is selected from aminopropyltriethoxysilane.

[0201] The preparation method of the adhesive as described in Comparative Example 3 includes the following steps:

[0202] Step S1, mix the acrylate monomers and epoxy monomers evenly to obtain a first monomer mixture; dissolve the first initiator in the first solvent to obtain a first initiator solution; add the third solvent to the bottom of the reaction kettle, heat, and dropwise add the first monomer mixture and the first initiator solution. After the dropping is completed, keep the temperature constant to obtain Component A; in Step S1, the addition amount of the third solvent at the bottom of the reaction kettle is based on the solid content of Component A reaching 20%, the heating temperature is 60 °C, the heating time is 1.5 h, and the heat preservation time is 1 h.

[0203] Step S2, mix the acrylate monomers, tertiary amine monomers, and hydroxyl monomers evenly to obtain a second monomer mixture; dissolve the second initiator in the second solvent to obtain a second initiator solution; add the fourth solvent to the bottom of the reaction kettle, heat, and dropwise add the second monomer mixture and the second initiator solution. After the dropping is completed, keep the temperature constant to obtain Component B; in Step S2, the addition amount of the fourth solvent at the bottom of the reaction kettle is based on the solid content of Component B reaching 20%, the heating temperature is 60 °C, the heating time is 1.5 h, and the heat preservation time is 1 h.

[0204] Step S3, mix Component A, Component B, and the adhesion promoter, add the fifth solvent to adjust the solid content, and mix evenly to obtain the adhesive; in Step S3, the addition amount of the fifth solvent is based on the solid content of the adhesive reaching 10%.

[0205] The third solvent is toluene; the fourth solvent is toluene; the fifth solvent is toluene.

[0206] The application of the adhesive as described in Comparative Example 3 in a sunshade composite film, apply the adhesive as described in Comparative Example 3 on the surface of the PVC film material, and the coating amount is 20 g / m2 After drying at 55 °C for 1.5 min, the PVF film and the PVC film were hot-pressed and laminated to obtain a composite film, and the composite film was placed in an oven at 50 °C and cured for 1 day.

[0207] Comparative Example 4: An adhesive, comprising the following components in parts by mass:

[0208] Component A 80;

[0209] Component B 14;

[0210] Adhesion promoter 1;

[0211] Wherein:

[0212] Component A includes a first initiator solution and acrylate monomers, epoxy monomers, and fluorine-containing monomers with a mass ratio of 65:12:4; by mass percentage, the first initiator solution includes 5% of the first initiator and 95% of the first solvent, and the addition amount of the first initiator is 0.5% of the total mass of the acrylate monomers, epoxy monomers, and fluorine-containing monomers.

[0213] In Component A, the acrylate monomers are selected from methyl (meth)acrylate; the epoxy monomer is selected from glycidyl methacrylate; the fluorine-containing monomer is selected from hexafluorobutyl (meth)acrylate.

[0214] The first initiator is selected from azobisisobutyronitrile; the first solvent is selected from toluene.

[0215] The glass transition temperature of Component A is 50 °C.

[0216] Component B includes a second initiator solution and acrylate monomers, tertiary amine monomers, and hydroxyl monomers with a mass ratio of 60:8:30; the second initiator solution includes 5% of the second initiator and 95% of the second solvent, and the addition amount of the second initiator is 0.5% of the total mass of the acrylate monomers, tertiary amine monomers, and hydroxyl monomers.

[0217] In Component B, the acrylate monomers are selected from methyl (meth)acrylate; the tertiary amine monomer is selected from diethylaminoethyl (meth)acrylate; the hydroxyl monomer is selected from hydroxyethyl (meth)acrylate.

[0218] The second initiator is selected from azobisisobutyronitrile; the second solvent is selected from toluene.

[0219] The glass transition temperature of Component B is 20 - 40 °C.

[0220] The adhesion promoter is selected from aminopropyltriethoxysilane.

[0221] The preparation method of the adhesive as described in Comparative Example 4 includes the following steps:

[0222] Step S1, mix acrylate monomers, epoxy monomers and fluorine-containing monomers uniformly to obtain a first monomer mixture; dissolve a first initiator in a first solvent to obtain a first initiator solution; add a third solvent to the bottom of the reaction kettle, heat, and dropwise add the first monomer mixture and the first initiator solution. After the dropping is completed, keep the temperature, and then component A is obtained; in step S1, the addition amount of the third solvent at the bottom of the reaction kettle is based on the solid content of component A reaching 20%, the heating temperature is 60°C, the heating time is 1.5 h, and the heat preservation time is 1 h.

[0223] Step S2, mix acrylate monomers, tertiary amine monomers and hydroxyl monomers uniformly to obtain a second monomer mixture; dissolve a second initiator in a second solvent to obtain a second initiator solution; add a fourth solvent to the bottom of the reaction kettle, heat, and dropwise add the second monomer mixture and the second initiator solution. After the dropping is completed, keep the temperature, and then component B is obtained; in step S2, the addition amount of the fourth solvent at the bottom of the reaction kettle is based on the solid content of component B reaching 20%, the heating temperature is 60°C, the heating time is 1.5 h, and the heat preservation time is 1 h.

[0224] Step S3, mix component A, component B and an adhesion promoter, add a fifth solvent to adjust the solid content, and mix uniformly to obtain an adhesive; in step S3, the addition amount of the fifth solvent is based on the solid content of the adhesive reaching 10%.

[0225] The third solvent is toluene; the fourth solvent is toluene; the fifth solvent is toluene.

[0226] For the application of the adhesive as described in Comparative Example 4 in a sunshade composite film, apply the adhesive as described in Comparative Example 4 on the surface of a PVC film material, with the coating amount being 20 g / m 2 , after drying at 55°C for 1.5 min, hot-press and bond a PVF film and a PVC film to obtain a composite film, and place the composite film in an oven at 50°C for 1 day for curing.

[0227] Comparative Example 5: An adhesive, comprising the following components in parts by mass:

[0228] Component A 80;

[0229] Component B 14;

[0230] Adhesion promoter 1;

[0231] Among them:

[0232] Component A includes a first initiator solution and acrylate monomers, epoxy monomers, and fluorine-containing monomers with a mass ratio of 65:12:15; by mass percentage, the first initiator solution includes 5% of the first initiator and 95% of the first solvent, and the addition amount of the first initiator is 0.5% of the total mass of the acrylate monomers, epoxy monomers, and fluorine-containing monomers.

[0233] In Component A, the acrylate monomer is selected from methyl (meth)acrylate; the epoxy monomer is selected from glycidyl methacrylate; and the fluorine-containing monomer is selected from hexafluorobutyl (meth)acrylate.

[0234] The first initiator is selected from azobisisobutyronitrile; the first solvent is selected from toluene.

[0235] The glass transition temperature of Component A is 70 - 95 °C.

[0236] Component B includes a second initiator solution and acrylate monomers, tertiary amine monomers, and hydroxyl monomers with a mass ratio of 60:8:5; the second initiator solution includes 5% of the second initiator and 95% of the second solvent, and the addition amount of the second initiator is 0.5% of the total mass of the acrylate monomers, tertiary amine monomers, and hydroxyl monomers.

[0237] In Component B, the acrylate monomer is selected from methyl (meth)acrylate; the tertiary amine monomer is selected from diethylaminoethyl (meth)acrylate; and the hydroxyl monomer is selected from 2-hydroxyethyl (meth)acrylate.

[0238] The second initiator is selected from azobisisobutyronitrile; the second solvent is selected from toluene.

[0239] The glass transition temperature of Component B is 60 °C.

[0240] The adhesion promoter is selected from aminopropyltriethoxysilane.

[0241] For the preparation method of the adhesive as described in Comparative Example 5, it includes the following steps:

[0242] Step S1: Mix the acrylate monomer, epoxy monomer, and fluorine-containing monomer uniformly to obtain a first monomer mixture; dissolve the first initiator in the first solvent to obtain a first initiator solution; add a third solvent to the bottom of the reaction kettle, heat, and drip the first monomer mixture and the first initiator solution. After the dripping is completed, keep it warm to obtain Component A. In Step S1, the addition amount of the third solvent at the bottom of the reaction kettle is based on the solid content of Component A reaching 20%, the heating temperature is 60 °C, the heating time is 1.5 h, and the insulation time is 1 h.

[0243] Step S2: Mix the acrylate monomer, tertiary amine monomer, and hydroxyl monomer uniformly to obtain a second monomer mixture; dissolve the second initiator in the second solvent to obtain a second initiator solution; add a fourth solvent to the bottom of the reaction kettle, heat, and drip the second monomer mixture and the second initiator solution. After the dripping is completed, keep it warm to obtain Component B. In Step S2, the addition amount of the fourth solvent at the bottom of the reaction kettle is based on the solid content of Component B reaching 20%, the heating temperature is 60 °C, the heating time is 1.5 h, and the insulation time is 1 h.

[0244] Step S3: Mix Component A, Component B and the adhesion promoter, add the fifth solvent to adjust the solid content, and mix evenly to obtain the adhesive. In Step S3, the addition amount of the fifth solvent is based on the solid content of the adhesive reaching 10%.

[0245] The third solvent is toluene; the fourth solvent is toluene; the fifth solvent is toluene.

[0246] For the application of the adhesive as described in Comparative Example 5 in the sunshade composite film, apply the adhesive as described in Comparative Example 5 on the surface of the PVC film material, with the coating amount of 20 g / m 2 , after drying at 55°C for 1.5 min, thermally press and bond the PVF film and the PVC film to obtain a composite film, and place the composite film in an oven at 50°C for curing for 1 day.

[0247] Perform performance tests on the composite film made of the above adhesive.

[0248] 1. Peel strength test: Cut the composite film sample into sample strips with a width of 25 mm and a length of 180 mm using a cutting knife. Use 3M double-sided tape to bond the PVF film surface of the composite film to the steel plate, and peel the PVC film to obtain 180° peel strength data. The specific test method refers to GB / T 2790.

[0249] 2. Rubbing performance test: Cut the composite film sample into sample strips with a width of 30 mm and a length of 130 mm using a cutting knife. Place the sample in a fixture, gently contact it and then apply a load until the distance is reduced to a load of 1.5 kg; under the conditions of a frequency of 120 times / min and a stroke of 50 mm, rub back and forth; observe whether there is peeling or blistering of the PVF film. The specific test method refers to JIS K6404-6.

[0250] 3. Low-temperature resistance test: Place the composite film sample in a freezer at -30°C for 4 hours, and then conduct a 180° bending test along a 3-mm axis diameter, and observe whether there is cracking of the sample. The specific test method refers to DIN EN 1876-1:1998.

[0251] 4. Schematic diagrams of the samples of the composite film made of the adhesive prepared in Example 1 after rubbing and bending are shown in Figure 1 , from Figure 1 It can be seen that the adhesive prepared in Example 1 of the present application exhibits good rubbing resistance and low-temperature bending resistance.

[0252] The test results are shown in the following table.

[0253]

[0254] From the data of each example and Comparative Example 1 and Comparative Example 5 in the above table, it can be seen that when component B is not added or the glass transition temperature of component B is not within the range of 20-40 °C, the initial peel strength, double 85 peel strength and ultraviolet aging strength of the obtained adhesive are all poor, cracking occurs after low-temperature treatment, and breakage occurs after kneading. The applicant analyzed that this is because: when component B is not added, the wettability of the adhesive layer is poor, the initial peel strength is reduced, and local stress concentration is likely to occur due to the poor flexibility of the adhesive layer during aging and kneading, resulting in a rapid decline in the performance of the sample.

[0255] From the data of each example and Comparative Example 2 in the above table, it can be seen that the initial peel strength, double 85 peel strength and ultraviolet aging strength of the obtained adhesive without adding an adhesion promoter are all poor, and breakage occurs after kneading. The applicant analyzed that this is because: without adding an adhesion promoter, it is difficult to form covalent bond crosslinking between the polymer and the substrate, the adhesion is reduced, and both the initial and aging resistance properties of the adhesive are significantly reduced.

[0256] From the data of each example and Comparative Example 3 in the above table, it can be seen that when the fluorine-containing monomer is not added to component A, the initial peel strength of the obtained adhesive is slightly reduced, while the double 85 peel strength and ultraviolet aging strength are both poor, and breakage occurs after kneading. The applicant analyzed that this is because: without adding the fluorine-containing monomer, the wettability of the polymer to the PVF film is poor, the initial peel strength is reduced, and the water resistance and ultraviolet aging resistance of the polymer are both reduced to a certain extent after removing the fluorine functional group.

[0257] From the data of each example and Comparative Example 4 in the above table, it can be seen that when the glass transition temperature of component A is not within the range of 70-95 °C, the initial peel strength of the adhesive is slightly reduced, while the double 85 peel strength and ultraviolet aging strength are both poor, and breakage occurs after kneading. The applicant analyzed that this is because: when the glass transition temperature of component A is too low, the overall mechanical strength of the adhesive layer is insufficient, and cohesive failure of the adhesive layer is likely to occur during peeling. When the mechanical properties are poor, it is difficult to maintain the structural integrity during the double 85, ultraviolet and kneading treatments.

[0258] In summary, it can be seen that the adhesive for composite films prepared by the method provided in this application has good bonding performance, not only has high initial peel strength, but also has good resistance to heat and humidity, ultraviolet, low temperature and kneading.

[0259] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An adhesive, characterized in that, It comprises the following components in parts by mass: Component A: 80 - 90; Component B: 9 - 19; Adhesion promoter: 0.1 - 1; Wherein: Component A includes a first initiator solution and acrylate monomers, epoxy monomers, and fluorine-containing monomers with a mass ratio of 65 - 90:5 - 20:5 - 15; by mass percentage, the first initiator solution includes 5 - 10% of a first initiator and 90 - 95% of a first solvent, and the addition amount of the first initiator is 0.5 - 2.0% of the total mass of the acrylate monomers, epoxy monomers, and fluorine-containing monomers; Component B includes a second initiator solution and acrylate monomers, tertiary amine monomers, and hydroxyl monomers with a mass ratio of 60 - 85:5 - 10:10 - 30; the second initiator solution includes 5 - 10% of a second initiator and 90 - 95% of a second solvent, and the addition amount of the second initiator is 0.5 - 2.0% of the total mass of the acrylate monomers, tertiary amine monomers, and hydroxyl monomers; The adhesion promoter is selected from at least one of aminopropyltriethoxysilane, aminopropyltrimethoxysilane, 2 - aminoethyl - aminopropyltrimethoxysilane, diethylenetriaminopropyltrimethoxysilane, and aminoethylaminopropylmethyldimethoxysilane; The glass transition temperature of Component A is 70 - 95 °C, and the glass transition temperature of Component B is 20 - 40 °C.

2. The adhesive according to claim 1, characterized in that, In Component A, the acrylate monomers are selected from at least one of methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, isooctyl (meth)acrylate, cyclohexyl (meth)acrylate, and isobornyl (meth)acrylate; the epoxy monomers are selected from at least one of glycidyl methacrylate and glycidyl acrylate; the fluorine-containing monomers are selected from at least one of hexafluorobutyl (meth)acrylate, tridecafluorooctyl (meth)acrylate, and trifluoroethyl (meth)acrylate.

3. The adhesive according to claim 1, characterized in that, In Component B, the acrylate monomers are selected from at least one of methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, isooctyl (meth)acrylate, cyclohexyl (meth)acrylate, and isobornyl (meth)acrylate; the tertiary amine monomers are selected from at least one of diethylaminoethyl (meth)acrylate and dimethylaminoethyl (meth)acrylate; the hydroxyl monomers are selected from at least one of 2 - hydroxyethyl (meth)acrylate, 2 - hydroxypropyl (meth)acrylate, and 2 - hydroxybutyl (meth)acrylate.

4. The adhesive according to claim 1, wherein The first initiator is selected from at least one of azobisisobutyronitrile, azobisisoheptonitrile, dibenzoyl peroxide, tert - butyl hydroperoxide, and hydrogen peroxide; the first solvent is selected from at least one of toluene, ethyl acetate, butyl acetate, and isopropyl alcohol.

5. The adhesive according to claim 1, characterized in that, The second initiator is selected from at least one of azobisisobutyronitrile, azobisisoheptonitrile, dibenzoyl peroxide, tert - butyl hydroperoxide, and hydrogen peroxide; the second solvent is selected from at least one of toluene, ethyl acetate, butyl acetate, and isopropyl alcohol.

6. The preparation method of the adhesive according to any one of claims 1 to 5, characterized in that, It includes the following steps: Step S1: Mix acrylate monomers, epoxy monomers, and fluorine-containing monomers evenly to obtain a first monomer mixture; dissolve a first initiator in a first solvent to obtain a first initiator solution; add a third solvent to the bottom of the reaction kettle, heat, and dropwise add the first monomer mixture and the first initiator solution. After the dropping is completed, keep the temperature, and thus obtain Component A; Step S2: Mix acrylate monomers, tertiary amine monomers, and hydroxyl monomers evenly to obtain a second monomer mixture; dissolve a second initiator in a second solvent to obtain a second initiator solution; add a fourth solvent to the bottom of the reaction kettle, heat, and dropwise add the second monomer mixture and the second initiator solution. After the dropping is completed, keep the temperature, and thus obtain Component B; Step S3: Mix Component A, Component B, and an adhesion promoter, add a fifth solvent to adjust the solid content, and mix evenly to obtain the adhesive.

7. The preparation method of the adhesive according to claim 6, characterized in that, The third solvent is toluene or ethyl acetate; the fourth solvent is toluene or ethyl acetate; the fifth solvent is toluene or ethyl acetate.

8. The preparation method of the adhesive according to claim 6, wherein In Step S1, the addition amount of the third solvent at the bottom of the reaction kettle is based on the solid content of Component A reaching 20 - 50%, the heating temperature is 60 - 85°C, the heating time is 1.5 - 2.5 h, and the heat preservation time is 1 - 2 h; In Step S2, the addition amount of the fourth solvent at the bottom of the reaction kettle is based on the solid content of Component B reaching 20 - 50%, the heating temperature is 60 - 85°C, the heating time is 1.5 - 2.5 h, and the heat preservation time is 1 - 2 h; In Step S3, the addition amount of the fifth solvent is based on the solid content of the adhesive reaching 10 - 30%.

9. Use of the adhesive according to any one of claims 1 to 5 in a sunshade composite film, characterized in that, Apply the adhesive according to any one of claims 1 to 5 on the surface of the PVC film material, and the amount of glue applied is 20-25 g / m 2 , after drying at 55-65°C for 1.5-2.5 min, thermally press and bond the PVF film and the PVC film to obtain a composite film, and place the composite film in an oven at 50-60°C for curing for 1-2 days.

Images