CN112029434A - Heat-insulating explosion-proof film for automobile front windshield glass - Google Patents
Heat-insulating explosion-proof film for automobile front windshield glass Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/50—Adhesives in the form of films or foils characterised by a primer layer between the carrier and the adhesive
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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Abstract
The invention provides a heat-insulating explosion-proof film for automobile front windshield glass, which comprises a high-strength high-light-transmission PET film layer, a high-light-transmission heat-insulating film layer and a high-light-transmission pressure-sensitive adhesive film layer; the high-light-transmission heat-insulation film layer is prepared from the following raw materials in parts by mass: 100 parts of organic silicon modified polyurethane resin, 5-10 parts of boron nitride nanosheet dispersion liquid, 0.1-0.3 part of ultraviolet absorbent UV-P and 0.5-2 parts of polyether modified siloxane; the high-light-transmission heat-insulation film layer can achieve the ultraviolet transmittance of less than 0.5% and the near infrared ray, infrared ray and ultraviolet ray reflectivity of more than 50% under the condition of realizing the light transmittance of more than 75%, does not cause electromagnetic shielding, and adopts raw materials with lower price and lower cost.
Description
Technical Field
The invention belongs to the technical field of heat-insulating explosion-proof films for automobile glass, and particularly relates to a heat-insulating explosion-proof film for automobile front windshield glass.
Background
The heat-insulating explosion-proof membrane is a common protective product for automobile glass, in particular to a heat-insulating explosion-proof membrane for automobile front windshield glass, has higher strength to realize the functions of strengthening and explosion prevention, and can reflect near infrared rays, infrared rays and ultraviolet rays as much as possible on the premise of having visible light transmittance of more than 70 percent so as to achieve the aim of really achieving heat insulation. The high-strength and explosion-proof function of the heat-insulating explosion-proof film is mainly realized by a high-strength high-light-transmission PET film layer, and the reflection function of near infrared rays, infrared rays and ultraviolet rays can be realized by the high-light-transmission heat-insulating film layer.
In the prior art, when the heat insulation film layer absorbs light, a part of the light is converted into heat energy which is transferred to a coating adhesion body or air flow, and a part of the heat energy generates secondary radiation. The light transmittance of the coating, which means the transmittance for visible light, should be as low as possible for absorption and reflection of visible light. Generally, a film layer prepared by properly blending and preparing is easy to achieve ultraviolet transmittance of, for example, 0.5% or less under the condition of achieving, for example, 75% or more transmittance, but is difficult to achieve, for example, near infrared ray + ultraviolet ray reflectance of, for example, 50% or more, or requires expensive raw materials or preparation processes, resulting in excessive cost. If the heat insulation film layer contains a metal film with proper thickness or other film layers with electric conduction capability, electromagnetic shielding can be caused, and the normal work of mobile phones and navigation equipment in a vehicle is influenced.
Therefore, it is necessary to develop a heat-insulating explosion-proof membrane which has lower cost, is easy to prepare, does not contain a metal membrane or other membrane layers with electric conductivity, does not cause electromagnetic shielding, and does not influence the normal work of mobile phones and navigation equipment in a vehicle.
Disclosure of Invention
In order to solve the technical problem, the invention provides a heat-insulating explosion-proof film for automobile front windshield glass, which comprises a high-strength high-light-transmission PET film layer, a high-light-transmission heat-insulating film layer and a high-light-transmission pressure-sensitive adhesive film layer; the high-light-transmission heat-insulation film layer is prepared from the following raw materials in parts by mass: 100 parts of organic silicon modified polyurethane resin, 5-10 parts of boron nitride nanosheet dispersion liquid, 0.2-0.4 part of ultraviolet absorbent UV-P and 0.5-2 parts of polyether modified siloxane; the boron nitride nanosheet dispersion is propylene glycol monomethyl ether acetate dispersion of hexagonal boron nitride nanosheets, and comprises 3-5% of hexagonal boron nitride nanosheets by mass concentration, 2-5 layers of hexagonal boron nitride nanosheets by average thickness, 0.2-1 mu m of external dimension, 0.1-0.3% of titanate coupling agent by mass concentration and 1-3% of polyvinyl alcohol. .
The heat-insulating anti-explosion film is low in cost and easy to prepare, has the visible light transmittance of more than 70%, the ultraviolet transmittance of less than 0.5% and the near infrared ray + ultraviolet ray reflectivity of more than 50%, is scattered reflection or diffuse reflection, is not dazzling, and is not easy to dazzle; the electromagnetic shielding is not caused, and the normal work of a mobile phone and navigation equipment in the automobile is not influenced; the high-light-transmission heat-insulation film layer does not contain a metal film, has no electric conduction capability, has visible light transmittance of more than 75%, ultraviolet transmittance of less than 0.5% and near infrared ray, infrared ray and ultraviolet reflectance of more than 55%, and is low in cost of adopted raw materials.
The organic silicon modified polyurethane resin is a product of Sanjin pigment Limited liability company in Xigyang county, and is of the brand SJ-5021, wherein the resin content is 50%; the cured coating can resist ultraviolet light for a long time without color change, the light transmittance can be kept above 90%, the hardness and the toughness are good, and the coating is scratch resistant.
The hexagonal boron nitride nanosheet dispersion liquid has good reflection effects on infrared rays, far infrared rays and ultraviolet rays, has good heat insulation and ultraviolet prevention performances, and is low in absorptivity and reflectivity on visible light when well dispersed; and the modified polyurethane resin is matched with the organic silicon modified polyurethane resin system and is easy to uniformly disperse in the organic silicon modified polyurethane resin system. Preferably 2-3 layers with average thickness and 0.3-0.5 μm external dimension.
The preparation method of the boron nitride nanosheet dispersion comprises the following steps: taking the micro-morphology of a disc shape, the diameter of the disc is 3-20 mu m, and the surface area is 2-6m in parts by mass21 part of hexagonal boron nitride powder per gram, 10 to 30 parts of pure water, 2 to 3 parts of ammonium fluoride and 0.5 to 1.5 parts of sodium fluoride are added, and the mixture is pulped and treated for 500 hours under the hydrothermal condition of 180 ℃ and 160-; removing free ions from the feed liquid after the hydrothermal treatment by an ion exchange method or an electrodialysis method, adding 20-35 parts of propylene glycol methyl ether acetate, distilling, refluxing, removing water, cooling to room temperature, adding a titanate coupling agent for treatment for 0.5-2 hours, and then adding polyvinyl alcohol for treatment for 0.5-1 hour to form a dispersion liquid. The added titanate coupling agent can be the titanate coupling agent TC-3 of a chemical auxiliary oil plant in Tianchan city. Titanate coupling agent in the transparent heat-insulating coating prepared by the inventionThe function of the coating formed by the material is to promote the uniform dispersion and interface combination of the boron nitride nanosheet in the organic silicon modified polyurethane resin, and also to remarkably improve the reflection of the cured coating on infrared rays, far infrared rays and ultraviolet rays, because the dosage of the coupling agent in the coating is usually less than 1% of the mass of the boron nitride nanosheet, so that the promotion effect of the uniform dispersion and the interface combination can be realized. The titanate coupling agent and polyvinyl alcohol both contribute to good suspension and dispersion of the boron nitride nanosheets in the boron nitride nanosheet dispersion and in the coating of the present invention.
The microscopic appearance is a disc shape, the diameter of the disc is 3-20 mu m, and the surface area is 2-10m2If the hexagonal boron nitride powder is not prepared into a nano-sheet, the propylene glycol monomethyl ether acetate, the titanate coupling agent and the polyvinyl alcohol are directly added, and no matter what proportion, feeding sequence and processing time are adopted, a well suspended and dispersed dispersion liquid cannot be obtained; even if the dispersion liquid with the same proportion is used for the coating of the invention, the prepared coating with the thickness of 20-30 mu m is opaque, the visible light transmittance is lower than 20 percent, and the near infrared ray, infrared ray and ultraviolet ray reflectivity is lower than 28 percent.
The main component of the ultraviolet absorbent UV-P is 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole, the ultraviolet absorption capability is high, the performance is stable and does not fade, and the ultraviolet absorbent UV-P is extremely matched with the organic silicon modified polyurethane resin system and is extremely easy to uniformly disperse in the organic silicon modified polyurethane resin system.
The polyether modified siloxane is a leveling assistant, such as a leveling agent product FC4430 of Guangzhou Chang Ling trade company Limited, and can reduce the surface tension of a coating system, so that the coating is leveled uniformly and the surface is smooth and glossy.
During preparation or use, 10-20 parts of propylene glycol monomethyl ether acetate (PMA) can be added as a solvent to dilute or adjust viscosity of the high-light-transmission heat-insulation film layer.
The preparation method of the high-light-transmission heat-insulation film layer can comprise the following steps:
(A) firstly preparing transparent heat-insulating coating
Adding organic silicon modified polyurethane resin into a shearing machine, starting a shearing motor, adding boron nitride nanosheet dispersion liquid, treating for 0.5-2h until the boron nitride nanosheet dispersion liquid is uniformly dispersed in the organic silicon modified polyurethane resin, adding ingredients such as an ultraviolet absorbent UV-P and polyether modified siloxane, and uniformly mixing to obtain a transparent heat-insulating coating;
(B) preparation of transparent heat insulation film layer
Forming a transparent heat-insulating coating with required thickness on the high-strength high-light-transmittance PET film layer by spraying, roller coating, printing and other modes, heating to 50-80 ℃ and curing for 30-200min, wherein the solvent contained in the curing process is gradually volatilized, and the resin components are gradually polymerized.
The cured transparent heat insulation film layer has the thickness of 20-30 μm, can achieve the light transmittance of more than 80%, the ultraviolet transmittance of less than 0.3% and the near infrared ray, infrared ray and ultraviolet ray reflectivity of more than 55%, and is scattered reflection or diffuse reflection without dazzling; compact and smooth film layer, uniform color, and high strength, hardness and toughness. The transparent heat insulation film layer of the boron nitride nanosheet after curing and the high-light-transmission heat insulation film layer have the key effects of light transmission, light absorption and light reflection.
The finally prepared heat-insulating explosion-proof film of the automobile front windshield glass can sequentially comprise a high-strength high-light-transmission PET film layer with the thickness of 30-60 mu m, a high-light-transmission heat-insulating film layer with the thickness of 20-30 mu m and a high-light-transmission pressure-sensitive adhesive film layer with the thickness of 5-20 mu m; preferably comprises two high-strength high-light-transmission PET film layers with the single thickness of 20-30 mu m, the high-light-transmission heat insulation film layer is sandwiched between the two high-strength high-light-transmission PET film layers, and the high-light-transmission pressure-sensitive adhesive film layer is arranged outside the high-strength high-light-transmission PET film layers. The high-light-transmission pressure-sensitive adhesive film layer plays a role in bonding and fixing when the heat-insulating explosion-proof film is attached and installed on the front windshield glass of the automobile. Besides the high-light-transmission pressure-sensitive adhesive film layer of the heat-insulating explosion-proof film, a layer of PET release film with a protection effect can be prepared, and the PET release film is torn off before installation but is not stuck with the high-light-transmission pressure-sensitive adhesive film layer completely. The heat-insulating explosion-proof membrane is low in cost and easy to prepare, has visible light transmittance of more than 70%, ultraviolet transmittance of less than 0.5% and near infrared ray, infrared ray and ultraviolet reflectance of more than 50%, is almost transparent and colorless, and after the heat-insulating explosion-proof membrane is installed on the front windshield glass of an automobile, the light transmittance and reflection effects are kept for a long time.
Detailed Description
The technical solution of the present invention is further illustrated below with reference to examples, but the present invention is not limited thereto.
Example 1
The transparent heat insulation film layer of the embodiment is prepared from the following raw materials in parts by mass: 100 parts of organic silicon modified polyurethane resin, 7 parts of boron nitride nanosheet dispersion liquid, 0.3 part of ultraviolet absorbent UV-P and 1 part of polyether modified siloxane. The preparation method comprises the following steps: adding organic silicon modified polyurethane resin into a shearing machine, starting a shearing motor, adding boron nitride nanosheet dispersion liquid, treating for 1h until the boron nitride nanosheets are uniformly dispersed in the organic silicon modified polyurethane resin, adding ingredients such as an ultraviolet absorbent UV-P, polyether modified siloxane and the like, and uniformly mixing to obtain the transparent heat-insulating coating. A judgment basis for uniform dispersion of the boron nitride nanosheets in the organic silicon modified polyurethane resin or the coating is that a mixed solution or the coating is filled in a 20ml glass test tube until the glass test tube is nearly full, a green or red laser beam is emitted along the central axis direction of the test tube, a uniform and stable Tyndall effect can be observed, and no solid matter can be seen, which is one characteristic of the obtained transparent heat insulation coating.
The preparation method of the boron nitride nanosheet dispersion comprises the following steps: based on parts by mass, the shape is a disk, the average diameter of the disk is 16 mu m (the disk shape and the average diameter are determined by scanning electron microscope pictures), and the surface area is 4.5m2Adding 20 parts of pure water, 2.5 parts of ammonium fluoride and 1 part of sodium fluoride into 1 part of hexagonal boron nitride powder per gram, pulping, treating for 400 hours under the hydrothermal condition of 165 ℃, cooling to room temperature, taking 15ml of dispersion liquid from a 20ml glass test tube, injecting green or red laser beams along the central axis direction of the test tube, and observing uniform and stable Tyndall effect without solid matter; removing free ions from the feed liquid after hydrothermal treatment by using a strong acid ion exchange resin and strong base ion exchange resin mixed bed, adding 30 parts of propylene glycol methyl ether acetate, distilling, refluxing to remove water, cooling to room temperature, and adding titanium acid0.06 part of ester coupling agent is mixed evenly and treated for 1 hour, and then 0.8 part of polyvinyl alcohol is added and mixed evenly and treated for 1 hour to form dispersion liquid. The mass concentration of the hexagonal boron nitride nanosheet in the obtained dispersion is 3.3%, the average thickness is 3 layers, the overall dimension is 0.7 mu m, and the titanate-containing coupling agent is 0.2% and the polyvinyl alcohol is 2.7%; even if a green or red laser beam is irradiated along the central axis of the test tube, a uniform and stable Tyndall effect can be observed, and no solid can be observed. Sampling 100ml of feed liquid from which free ions are removed by the ion exchange resin mixed bed, drying by a normal-temperature vacuum drying method, and measuring the surface area of the obtained powder to be more than 500m2The hexagonal boron nitride nanosheets can not be seen in the wafer-shaped shape through a scanning electron microscope, and the hexagonal boron nitride nanosheets can be judged to have 3 layers of average thickness and 0.7 mu m of external dimension through images and photographs of the scanning electron microscope, so that the hexagonal boron nitride nanosheets in the dispersion are inferred to have 3 layers of average thickness and 0.7 mu m of external dimension.
Forming the transparent heat-insulating coating with the required thickness on a clean glass plate by a blade coating mode, heating to 60 ℃ for curing for 120min, gradually volatilizing a solvent contained in the curing process, gradually polymerizing resin components, separating the obtained film layer from the glass plate, measuring the thickness to 27 mu m, and achieving 82% of light transmittance, 0.3% of ultraviolet transmittance and 57% of near infrared ray, infrared ray and ultraviolet ray reflectivity, wherein the light transmittance, the ultraviolet ray transmittance and the near infrared ray and ultraviolet ray reflectivity are scattered reflection or diffuse reflection, and the transparent heat-insulating coating is not dazzling and is not easy to dazzle; compact and smooth film layer, uniform color, and high strength, hardness and toughness. After the coating is dried in the sun for 1000 hours in summer and autumn, the light transmittance, the ultraviolet transmittance, the near infrared ray, the infrared ray and the ultraviolet ray reflectivity, the strength, the hardness and the toughness are tested to be almost unchanged, and the compact and smooth condition, the color and the uniform condition of the coating are unchanged.
The organic silicon modified polyurethane resin is a product of Sanjin pigment Limited liability company in Xigyang county, and is of the brand SJ-5021, wherein the resin content is 50%; the cured coating can resist ultraviolet light for a long time without color change, the light transmittance can be kept above 90%, the hardness and the toughness are good, and the coating is scratch resistant. The main component of the ultraviolet absorbent UV-P is 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole.
Example 2
Preparing a transparent heat insulation film layer with the thickness of 28 microns on a high-strength high-light-transmission PET film layer with the thickness of 23 microns by blade coating the transparent heat insulation coating prepared in the embodiment 1, wherein the curing condition is 75 ℃ x80min, then superposing another high-strength high-light-transmission PET film layer with the thickness of 23 microns on the transparent heat insulation film layer, and carrying out hot pressing at 100 ℃ for 10 min; the obtained composite film can reach 75% of light transmittance, 0.2% of ultraviolet transmittance and 53% of near infrared ray, infrared ray and ultraviolet ray reflectivity, is scattered reflection or diffuse reflection, is not dazzling and is not easy to dazzle; the film layer is compact and smooth and has uniform color. After the composite film is dried in the sun for 1000 hours in summer and autumn, the tested light transmittance, ultraviolet transmittance, near infrared ray, infrared ray and ultraviolet ray reflectivity, strength, hardness and toughness are almost unchanged, no layering exists, and the compact condition, color and uniform condition are unchanged.
The composite film has the transmittance to various frequency signals of a 5G mobile phone and the transmittance to various frequency signals of a Beidou navigation system and a GPS navigation system higher than 97 percent, so that electromagnetic shielding is not caused.
Comparative example 1
The film of this comparative example 1 was prepared essentially as in the formulation and method of example 1, except that the boron nitride nanoplate dispersion was not employed. The resulting film had a thickness of 27 μm, a light transmittance of 87%, an ultraviolet transmittance of 1.2%, and a near-infrared + ultraviolet reflectance of 22%.
Claims (8)
1. A heat insulation explosion-proof film for automobile front windshield glass comprises a high-strength high-light-transmission PET film layer, a high-light-transmission heat insulation film layer and a high-light-transmission pressure-sensitive adhesive film layer; the high-light-transmission heat-insulation film layer is prepared from the following raw materials in parts by mass: 100 parts of organic silicon modified polyurethane resin, 5-10 parts of boron nitride nanosheet dispersion liquid, 0.1-0.3 part of ultraviolet absorbent UV-P and 0.5-2 parts of polyether modified siloxane; the boron nitride nanosheet dispersion is propylene glycol monomethyl ether acetate dispersion of hexagonal boron nitride nanosheets, and comprises 3-5% of hexagonal boron nitride nanosheets by mass concentration, 2-5 layers of hexagonal boron nitride nanosheets by average thickness, 0.2-1 mu m of external dimension, 0.1-0.3% of titanate coupling agent by mass concentration and 1-3% of polyvinyl alcohol.
2. The thermal insulation explosion-proof membrane for the automobile front windshield glass according to claim 1, wherein in the boron nitride nanosheet dispersion, the hexagonal boron nitride nanosheets have an average thickness of 2-3 layers and an external dimension of 0.3-0.5 μm.
3. The thermal insulation explosion-proof film for the automobile front windshield glass according to claim 1, wherein the preparation method of the boron nitride nanosheet dispersion liquid comprises the following steps: taking the micro-morphology as a disk, the diameter of the disk is 3-20 mu m, and the surface area is 2-10m in parts by mass21 part of hexagonal boron nitride powder per gram, 10 to 30 parts of pure water, 2 to 3 parts of ammonium fluoride and 0.5 to 1.5 parts of sodium fluoride are added, and the mixture is pulped and treated for 500 hours under the hydrothermal condition of 180 ℃ and 160-; removing free ions from the feed liquid after the hydrothermal treatment by an ion exchange method or an electrodialysis method, adding 20-35 parts of propylene glycol methyl ether acetate, distilling, refluxing, removing water, cooling to room temperature, adding a titanate coupling agent for treatment for 0.5-2 hours, and then adding polyvinyl alcohol for treatment for 0.5-1 hour to form a dispersion liquid.
4. The thermal insulation and explosion-proof film for the front windshield glass of the automobile as recited in claim 1, wherein the raw material of the high light-transmitting and thermal insulation film layer further comprises 10 to 20 parts of propylene glycol methyl ether acetate.
5. The heat-insulating and explosion-proof film for the front windshield glass of the automobile as claimed in claim 1, wherein the preparation method of the high light-transmitting and heat-insulating film layer comprises the following steps:
(A) firstly preparing transparent heat-insulating coating
Adding organic silicon modified polyurethane resin into a shearing machine, starting a shearing motor, adding blue nano tungsten oxide powder, treating for 0.5-2h until the blue nano tungsten oxide powder is dispersed and uniformly mixed in the organic silicon modified polyurethane resin, adding an ultraviolet absorbent UV-P and polyether modified siloxane, and uniformly mixing to obtain a transparent heat insulation coating;
(B) preparation of transparent heat insulation film layer
And forming a transparent heat-insulating coating with the required thickness on the high-strength high-light-transmittance PET film layer by spraying, roll coating and printing, and then heating to 50-80 ℃ for curing for 30-200 min.
6. The heat-insulating explosion-proof film for the front windshield glass of the automobile as claimed in claim 1, which comprises a high-strength high-light-transmission PET film layer with the thickness of 30-60 μm, a high-light-transmission heat-insulating film layer with the thickness of 20-30 μm, and a high-light-transmission pressure-sensitive adhesive film layer with the thickness of 5-20 μm in sequence.
7. The thermal insulation and explosion-proof film for the front windshield glass of an automobile as recited in claim 1, which comprises two high-strength high-transmittance PET film layers with a single layer thickness of 20-30 μm, wherein the high-transmittance thermal insulation film layer is sandwiched between the two high-strength high-transmittance PET film layers, and the high-transmittance pressure-sensitive adhesive film layer is arranged outside the high-strength high-transmittance PET film layers.
8. The heat-insulating explosion-proof film for the front windshield glass of the automobile as claimed in claim 1, wherein a protective PET release film is arranged outside the high-light-transmission pressure-sensitive adhesive film layer.
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| CN202010952699.7A CN112029434A (en) | 2020-09-11 | 2020-09-11 | Heat-insulating explosion-proof film for automobile front windshield glass |
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| CN202010952699.7A CN112029434A (en) | 2020-09-11 | 2020-09-11 | Heat-insulating explosion-proof film for automobile front windshield glass |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN106543913A (en) * | 2015-09-23 | 2017-03-29 | 上海沪正纳米科技有限公司 | A kind of multifunctional nano film and preparation method thereof |
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