Solvent type high-molecular nano heat-insulating high-temperature baking varnish and preparation method thereof

Abstract

The invention relates to the technical field of coating preparation, and particularly discloses solvent type high-molecular nano heat-insulating high-temperature baking varnish and a preparation method thereof. The coating is characterized by being prepared from 40-60 parts of high-molecular hydroxy acrylic resin, 20-30 parts of high-molecular amino resin, 1-15 parts of a nano material, 2-5 parts of n-butyl alcohol, 5-10 parts of xylene, 2-5 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 2-5 parts of trimethylbenzene, 0.1-5 parts of a flatting agent, 0.1-2 parts of an acrylate flatting agent and 0.5-1 part of an ultraviolet light absorber. The first innovative point of the invention is to realize the heat insulation of a paint film, and the heat insulation effect of the paint film is realized by adding the nano material by taking the mixed resin of the high-molecular hydroxy acrylic resin and the high-molecular amino resin as a film forming matter; and a coating product with heat insulation performance, high gloss, high hardness and high aging resistance is prepared in a simplest physical mixing and stirring mode in the field of solvent type high-temperature baking varnish, the preparation efficiency is ultrahigh, and energy and time are saved.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle polymer coating preparation, in particular to a vehicle solvent-based polymer nano thermal insulation high-temperature baking varnish and a preparation method thereof. Background Art

[0002] As early as December 3, 2015, our company was authorized to apply for the invention patent of "a kind of paint for vehicles", with the patent number "ZL201310218567.1". Through this patented technology, we can produce vehicle varnish with hydroxy acrylic resin, alkyd resin and polyester resin as the main film-forming substances, adding leveling agent, drying agent, and organic solvents such as n-butyl acetate and xylene, and spraying with a spray gun to obtain a bright and smooth varnish coating on the vehicle body.

[0003] Before the invention of this technology, vehicle paint only has the function of anti-corrosion for vehicle sheet metal and beautification of the vehicle. With the rise and popularization of new energy vehicles, energy is an important source of power for various vehicles, and energy consumption is crucial. Whether it is a pure electric vehicle (BEV), a hybrid electric vehicle (HEV) or a fuel cell vehicle (FCEV), energy consumption determines the range of new energy vehicles, and even more determines human protection of the atmosphere and the environment.

[0004] Tests have shown that when a car is exposed to the sun for a long time at a high temperature of 40°C outdoors, the temperature inside the car is above 70 degrees and can reach up to 90 degrees. At this time, after starting the vehicle, it is necessary to use air conditioning to cool the temperature inside the car. In this cooling process, a lot of energy is needed for cooling. In summer, when the vehicle is driving under the scorching sun, a lot of energy is also needed to cool the car so that passengers can ride in a comfortable temperature. When the vehicle is exposed outdoors, it is not only the problem of high temperature inside the car, but also many plastic parts and circuits inside and outside the car will accelerate aging. If it continues for a long time, it will cause serious damage to the vehicle, reduce the service life of the vehicle, and also threaten the personal safety of the passengers.

[0005] At present, all vehicles require a lot of electricity for air conditioning and cooling. The outdoor temperature and the temperature setting inside the car directly determine the amount of electricity consumed. Now many electric vehicles consume 1%-5% of the battery power per hour (different manufacturers have different consumption). Turning on the air conditioner in a gasoline vehicle will also increase the consumption of gasoline or diesel, which means that turning on the air conditioner will reduce the vehicle's range and increase the vehicle's energy consumption. How to effectively block the heat outside the car from being transferred to the inside of the car through the body coating is a technology that is worth studying.

[0006] In order to solve the above problems, the car body can be coated with a high-temperature baking varnish with heat insulation performance when it leaves the factory, which can block the heat outside the car from being transferred into the car, reduce the impact of the temperature outside the car on the temperature inside the car, and make the temperature inside the car rise slightly or not rise at all, which will inevitably save the consumption of electricity, extend the vehicle's cruising range, achieve energy conservation and emission reduction, and protect the atmosphere and environment. At the same time, it can also extend the service life of the vehicle and indirectly protect the life safety of passengers. After years of research and development, our company has developed a solvent-based polymer nano-insulation high-temperature baking varnish for vehicles and its preparation method, and at the same time transformed the preparation method into a set of nano-insulation high-temperature baking varnish products for vehicles, which effectively solves and reduces the problem of energy consumption of vehicle air conditioning. Summary of the invention

[0007] The purpose of the present invention is to provide a solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles and a preparation method thereof to solve the problems raised in the above background technology. To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles comprises the following materials in parts by weight: 40-60 parts of polymer hydroxy acrylic resin, 20-30 parts of polymer amino resin, 1-15 parts of nano material, 2-5 parts of n-butanol, 5-10 parts of xylene, 2-5 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 2-5 parts of trimethylbenzene, 0.1-5 parts of leveling agent, 0.1-2 parts of acrylate leveling agent, 0.5-1 parts of ultraviolet light absorber and 0.5-1 parts of ultraviolet light stabilizer.

[0009] As a further scheme of the present invention: the following materials are included in parts by weight: 30-50 parts of polymer hydroxy acrylic resin, 15-30 parts of polymer amino resin, 5-15 parts of nanomaterials, 1-3 parts of n-butanol, 1-10 parts of xylene, 2-5 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 3-7 parts of trimethylbenzene, 0.01-2 parts of leveling agent, 0.01-2 parts of acrylate leveling agent, 0.2-1 parts of ultraviolet absorber, and 0.5-2 parts of ultraviolet stabilizer.

[0010] As a further scheme of the present invention: it includes the following materials composed by weight: 35-65 parts of high molecular weight hydroxy acrylic resin, 10-20 parts of high molecular weight amino resin, 5-10 parts of nanomaterials, 2-3 parts of n-butanol, 2-7 parts of xylene, 1-3 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 1-6 parts of trimethylbenzene, 0.05-1 parts of leveling agent, 0.05-2 parts of acrylate leveling agent, 0.1-2 parts of ultraviolet light absorber, and 0.1-2 parts of ultraviolet light stabilizer.

[0011] As a further scheme of the present invention: it includes the following materials in parts by weight: 30-60 parts of high molecular weight hydroxy acrylic resin, 10-20 parts of high molecular weight amino resin, 1-5 parts of nano material, 1-5 parts of n-butanol, 1-5 parts of xylene, 2-7 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 2-8 parts of trimethylbenzene, 0.1-2 parts of leveling agent, 0.1-2 parts of ultraviolet light absorber, and 0.1-2 parts of ultraviolet light stabilizer.

[0012] As a further solution of the present invention: the nanomaterial is modified ATO nano-slurry, nano-ITO dispersion, nano-ATO dispersion, nano-ITO, nano-GTO insulation powder, nano-zirconium oxide, nano-AZO, silica aerogel powder or silica aerogel paste. According to the thermal insulation performance and cost control, at least one or more combinations are used. The nanomaterial has a low thermal conductivity (after drying, 25°C) of 0.001 to 3W / (m·K) and a particle size of 0.1 to 20μm.

[0013] As a further solution of the present invention: the leveling agent is an organic silicon leveling agent, an acrylate leveling agent, a fluorine-modified leveling agent, or the above leveling agents are used alone or in combination of two or three of the above leveling agents.

[0014] The preparation of the above-mentioned solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles comprises the following steps:

[0015] S1. Prepare raw materials and test each material according to the standards;

[0016] S2, weighing high molecular hydroxy acrylic resin and high molecular amino resin by weight, slowly adding them into the container cylinder, and dispersing them at a speed of 300-500r / min for 10-20min in an explosion-proof disperser, slowly adding nanomaterials under stirring, and dispersing them at a speed of 300-500r / min for 10-20min in an explosion-proof disperser; obtaining a primary nanomaterial mixed solution;

[0017] At the same time, in this step, 10% by weight of high molecular weight hydroxy acrylic resin is reserved to adjust the viscosity of the initial nano material mixture;

[0018] S3, the viscosity, fineness and other indicators of the initial nanomaterial mixture obtained in S2 are tested. After all indicators are qualified, enter S4. When the viscosity is greater than 82s, add an appropriate amount of n-butanol or xylene in the material to lower it. When the viscosity is less than 78s, add the high molecular hydroxyl acrylic resin reserved in S2 to increase it. When measuring the viscosity, the coating of 4 cups itself is also required to be 25℃±1. When the indoor temperature is higher than 26℃, the coating of 4 cups needs to be cooled with a refrigerator or ice cubes. When the indoor temperature is less than 24℃, the coating of 4 cups needs to be heated in an oven. The specific indicators are shown in the table below:

[0019]

[0020] S4, weighing n-butanol, xylene, propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, trimethylbenzene, leveling agent, acrylate leveling agent, ultraviolet light absorber, ultraviolet light stabilizer by weight, slowly adding them to the qualified initial nano material mixed solution, and immediately increasing the speed of the disperser to 600-800 rpm, high-speed dispersion for 50-60 minutes, to obtain a solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles;

[0021] At the same time, this step should reserve 5% by weight of n-butanol or xylene to adjust the viscosity of the solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles;

[0022] S5. Test the various indicators of the solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles made by S4. When the viscosity is greater than 52s, add an appropriate amount of n-butanol or xylene reserved by S4 to lower it. When the viscosity is less than 48s, add the polymer hydroxy acrylic resin reserved by S2 to increase it. Pay special attention to the fact that when measuring the viscosity, the coating 4 cups itself is also required to be 25℃±1. When the indoor temperature is higher than 26℃, it is necessary to use a refrigerator or ice cubes to cool down the coating 4 cups. When the indoor temperature is less than 24℃, it is necessary to use an oven to heat up the coating 4 cups. The specific indicators are shown in the table below:

[0023]

[0024] S6. Filter the qualified solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles tested in S5 using a 300-mesh filter cloth to obtain qualified solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles.

[0025] The above-mentioned solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles is used in the field of coating preparation.

[0026] Compared with the prior art, the beneficial effects of the present invention are: a solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles is realized, and the polymer solvent-based hydroxy acrylic resin and amino resin are used as the main materials, and the ratio of nano materials, various solvents, leveling agents, ultraviolet light absorbers and ultraviolet light stabilizers is adjusted, and mixed according to certain detection standards, so that a high-temperature baking varnish with high thermal insulation rate, good leveling, high fullness, high hardness, high gloss and good weather resistance can be prepared. After spraying, the heat outside the vehicle is blocked from being transferred to the vehicle, and the influence of the temperature outside the vehicle on the temperature inside the vehicle is reduced, so that the temperature inside the vehicle is slightly increased or not increased, the temperature inside the vehicle is reduced, electricity is saved, the vehicle's cruising range is increased, energy conservation and emission reduction are achieved, and the protection of the atmosphere and the environment is improved. At the same time, it can extend the service life of the vehicle and indirectly protect the life safety of passengers. The product has high thermal insulation rate, easy construction, high construction efficiency, good surface effect, good weather resistance, can be widely used in original vehicle spraying, 130-160°C baking for 30 minutes to dry, and the construction efficiency is very high. DETAILED DESCRIPTION

[0027] In order to make the public better understand the present invention, the technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0028] Implementation Example 1

[0029] The invention discloses a preparation method for a solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles, comprising the following materials in parts by weight: 40-60 parts of a polymer hydroxy acrylic resin, 20-30 parts of a polymer amino resin, 1-15 parts of a nano material, 2-5 parts of n-butanol, 5-10 parts of xylene, 2-5 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 2-5 parts of trimethylbenzene, 0.1-5 parts of a leveling agent, 0.1-2 parts of an acrylate leveling agent, 0.5-1 parts of an ultraviolet light absorber, and 0.5-1 parts of an ultraviolet light stabilizer.

[0030] Specifically, in this embodiment, the polymer hydroxyl acrylic resin is a hydroxyl acrylic resin with a solid content of 60-80%, a hydroxyl value of 2.0-5.0, a drying temperature of the resin greater than 130°C, and a baking drying time of less than 30 minutes; it can be imported or domestically produced;

[0031] Specifically, in this embodiment, the polymer amino resin is an amino resin with a solid content of 60-80%. The drying temperature of the resin is greater than 130°C, and the baking drying time is less than 30 minutes. It can be imported or domestically produced.

[0032] Specifically, in this embodiment, the nanomaterial is a modified ATO nano-slurry, a nano-ITO dispersion, a nano-ATO dispersion, a nano-ITO, a nano-GTO thermal insulation powder, a nano-zirconium oxide, a nano-AZO, a silica aerogel powder or a silica aerogel paste. According to the thermal insulation performance and cost control, at least one or more combinations are used. The nanomaterial has a low thermal conductivity (after drying, 25° C.) of 0.001 to 3 W / (m·K) and a particle size of 0.1 to 20 μm.

[0033] Specifically, in this embodiment, the n-butanol has a purity of 99.5% or more and a water content of less than 500 ppm, and can be produced by any manufacturer;

[0034] Specifically, in this embodiment, the xylene has a purity of 99.5% or more and a water content of less than 500 ppm, and can be produced by any manufacturer;

[0035] Specifically, in this embodiment, the propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate has a purity of more than 99% and a moisture content of less than 500 ppm, and can be produced by any manufacturer;

[0036] Specifically, in this embodiment, the purity of the trimethylbenzene is above 99.5% and the water content is less than 500ppm, and any manufacturer may be used;

[0037] Specifically, in this embodiment, the leveling agent is a silicone leveling agent, an acrylate leveling agent, a fluorine-modified leveling agent, and products of manufacturers such as BYK, BASF, and Axal can be used;

[0038] Specifically, in this embodiment, the ultraviolet light absorber and ultraviolet light stabilizer can be products of manufacturers such as Taiwan Yongguang;

[0039] Implementation Example 2

[0040] The invention discloses a preparation method for a solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles, comprising the following materials in parts by weight: 30-50 parts of a polymer hydroxy acrylic resin, 15-30 parts of a polymer amino resin, 5-15 parts of a nano material, 1-3 parts of n-butanol, 1-10 parts of xylene, 2-5 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 3-7 parts of trimethylbenzene, 0.01-2 parts of a leveling agent, 0.01-2 parts of an acrylate leveling agent, 0.2-1 parts of an ultraviolet light absorber, and 0.5-2 parts of an ultraviolet light stabilizer.

[0041] Specifically, in this embodiment, the polymer hydroxyl acrylic resin is a hydroxyl acrylic resin with a solid content of 60-80%, a hydroxyl value of 2.0-5.0, a drying temperature of the resin greater than 130°C, and a baking drying time of less than 30 minutes; it can be imported or domestically produced;

[0042] Specifically, in this embodiment, the polymer amino resin is an amino resin with a solid content of 60-80%. The drying temperature of the resin is greater than 130°C, and the baking drying time is less than 30 minutes. It can be imported or domestically produced.

[0043] Specifically, in this embodiment, the nanomaterial is a modified ATO nano-slurry, a nano-ITO dispersion, a nano-ATO dispersion, a nano-ITO, a nano-GTO thermal insulation powder, a nano-zirconium oxide, a nano-AZO, a silica aerogel powder or a silica aerogel paste. According to the thermal insulation performance and cost control, at least one or more combinations are used. The nanomaterial has a low thermal conductivity (after drying, 25° C.) of 0.001 to 3 W / (m·K) and a particle size of 0.1 to 20 μm.

[0044] Specifically, in this embodiment, the n-butanol has a purity of 99.5% or more and a water content of less than 500 ppm, and can be produced by any manufacturer;

[0045] Specifically, in this embodiment, the xylene has a purity of 99.5% or more and a moisture content of less than 500 ppm, and can be produced by any manufacturer;

[0046] Specifically, in this embodiment, the propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate has a purity of more than 99% and a moisture content of less than 500 ppm, and can be produced by any manufacturer;

[0047] Specifically, in this embodiment, the purity of the trimethylbenzene is above 99.5% and the water content is less than 500ppm, and any manufacturer may be used;

[0048] Specifically, in this embodiment, the leveling agent is a silicone leveling agent, an acrylate leveling agent, a fluorine-modified leveling agent, and products of manufacturers such as BYK, BASF, and Axal can be used;

[0049] Specifically, in this embodiment, the ultraviolet light absorber and ultraviolet light stabilizer can be products of manufacturers such as Taiwan Yongguang;

[0050] Implementation Example 3

[0051] The invention discloses a preparation method for a solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles, comprising the following materials in parts by weight: 35-65 parts of a polymer hydroxy acrylic resin, 10-20 parts of a polymer amino resin, 5-10 parts of a nano material, 2-3 parts of n-butanol, 2-7 parts of xylene, 1-3 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 1-6 parts of trimethylbenzene, 0.05-1 parts of a leveling agent, 0.05-2 parts of an acrylic leveling agent, 0.1-2 parts of an ultraviolet light absorber, and 0.1-2 parts of an ultraviolet light stabilizer.

[0052] Specifically, in this embodiment, the polymer hydroxyl acrylic resin is a hydroxyl acrylic resin with a solid content of 60-80%, a hydroxyl value of 2.0-5.0, a drying temperature of the resin greater than 130°C, and a baking drying time of less than 30 minutes; it can be imported or domestically produced;

[0053] Specifically, in this embodiment, the polymer amino resin is an amino resin with a solid content of 60-80%. The drying temperature of the resin is greater than 130°C, and the baking drying time is less than 30 minutes. It can be imported or domestically produced.

[0054] Specifically, in this embodiment, the nanomaterial is a modified ATO nano-slurry, a nano-ITO dispersion, a nano-ATO dispersion, a nano-ITO, a nano-GTO thermal insulation powder, a nano-zirconium oxide, a nano-AZO, a silica aerogel powder or a silica aerogel paste. According to the thermal insulation performance and cost control, at least one or more combinations are used. The nanomaterial has a low thermal conductivity (after drying, 25° C.) of 0.001 to 3 W / (m·K) and a particle size of 0.1 to 20 μm.

[0055] Specifically, in this embodiment, the n-butanol has a purity of 99.5% or more and a water content of less than 500 ppm, and can be produced by any manufacturer;

[0056] Specifically, in this embodiment, the xylene has a purity of 99.5% or more and a moisture content of less than 500 ppm, and can be produced by any manufacturer;

[0057] Specifically, in this embodiment, the propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate has a purity of more than 99% and a moisture content of less than 500 ppm, and can be produced by any manufacturer;

[0058] Specifically, in this embodiment, the purity of the trimethylbenzene is above 99.5% and the water content is less than 500ppm, and any manufacturer may be used;

[0059] Specifically, in this embodiment, the leveling agent is a silicone leveling agent, an acrylate leveling agent, a fluorine-modified leveling agent, and products of manufacturers such as BYK, BASF, and Axal can be used;

[0060] Specifically, in this embodiment, the ultraviolet light absorber and ultraviolet light stabilizer can be products of manufacturers such as Taiwan Yongguang;

[0061] Implementation Example 4

[0062] The invention discloses a preparation method for a solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles, comprising the following materials in parts by weight: 30-60 parts of a polymer hydroxy acrylic resin, 10-20 parts of a polymer amino resin, 1-5 parts of a nano material, 1-5 parts of n-butanol, 1-5 parts of xylene, 2-7 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 2-8 parts of trimethylbenzene, 0.1-2 parts of a leveling agent, 0.1-2 parts of an ultraviolet light absorber, and 0.1-2 parts of an ultraviolet light stabilizer.

[0063] Specifically, in this embodiment, the polymer hydroxyl acrylic resin is a hydroxyl acrylic resin with a solid content of 60-80%, a hydroxyl value of 2.0-5.0, a drying temperature of the resin greater than 130°C, and a baking drying time of less than 30 minutes; it can be imported or domestically produced;

[0064] Specifically, in this embodiment, the polymer amino resin is an amino resin with a solid content of 60-80%. The drying temperature of the resin is greater than 130°C, and the baking drying time is less than 30 minutes. It can be imported or domestically produced.

[0065] Specifically, in this embodiment, the nanomaterial is a modified ATO nano-slurry, a nano-ITO dispersion, a nano-ATO dispersion, a nano-ITO, a nano-GTO thermal insulation powder, a nano-zirconium oxide, a nano-AZO, a silica aerogel powder or a silica aerogel paste. According to the thermal insulation performance and cost control, at least one or more combinations are used. The nanomaterial has a low thermal conductivity (after drying, 25° C.) of 0.001 to 3 W / (m·K) and a particle size of 0.1 to 20 μm.

[0066] Specifically, in this embodiment, the n-butanol has a purity of 99.5% or more and a water content of less than 500 ppm, and can be produced by any manufacturer;

[0067] Specifically, in this embodiment, the xylene has a purity of 99.5% or more and a water content of less than 500 ppm, and can be produced by any manufacturer;

[0068] Specifically, in this embodiment, the propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate has a purity of more than 99% and a moisture content of less than 500 ppm, and can be produced by any manufacturer;

[0069] Specifically, in this embodiment, the purity of the trimethylbenzene is above 99.5% and the water content is less than 500ppm, and any manufacturer may be used;

[0070] Specifically, in this embodiment, the leveling agent is a silicone leveling agent, an acrylate leveling agent, a fluorine-modified leveling agent, and products of manufacturers such as BYK, BASF, and Axal can be used;

[0071] Specifically, in this embodiment, the ultraviolet light absorber and ultraviolet light stabilizer can be products of manufacturers such as Taiwan Yongguang;

[0072] The preparation of the above-mentioned solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles also includes the following steps:

[0073] S1. Prepare raw materials and test each material according to the standards;

[0074] S2, weighing high molecular hydroxy acrylic resin and high molecular amino resin by weight, slowly adding them into the container cylinder, and dispersing them at a speed of 300-500r / min for 10-20min in an explosion-proof disperser, slowly adding nanomaterials under stirring, and dispersing them at a speed of 300-500r / min for 10-20min in an explosion-proof disperser; obtaining a primary nanomaterial mixed solution;

[0075] At the same time, in this step, 10% by weight of high molecular weight hydroxy acrylic resin is reserved to adjust the viscosity of the initial nano material mixture;

[0076] S3, the viscosity, fineness and other indicators of the initial nanomaterial mixture obtained in S2 are tested. After all indicators are qualified, enter S4. When the viscosity is greater than 82s, add an appropriate amount of n-butanol or xylene in the material to lower it. When the viscosity is less than 78s, add the high molecular hydroxyl acrylic resin reserved in S2 to increase it. When measuring the viscosity, the coating of 4 cups itself is also required to be 25℃±1. When the indoor temperature is higher than 26℃, the coating of 4 cups needs to be cooled with a refrigerator or ice cubes. When the indoor temperature is less than 24℃, the coating of 4 cups needs to be heated in an oven. The specific indicators are shown in the table below:

[0077]

[0078] S4, weighing n-butanol, xylene, propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, trimethylbenzene, leveling agent, acrylate leveling agent, ultraviolet light absorber, ultraviolet light stabilizer by weight, slowly adding them to the qualified initial nano material mixed solution, and immediately increasing the speed of the disperser to 600-800 rpm, high-speed dispersion for 50-60 minutes, to obtain a solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles;

[0079] At the same time, this step should reserve 5% by weight of n-butanol or xylene to adjust the viscosity of the solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles;

[0080] S5. Test the various indicators of the solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles made by S4. When the viscosity is greater than 52s, add an appropriate amount of n-butanol or xylene reserved by S4 to lower it. When the viscosity is less than 48s, add the polymer hydroxy acrylic resin reserved by S2 to increase it. Pay special attention to the fact that when measuring the viscosity, the coating 4 cups itself is also required to be 25℃±1. When the indoor temperature is higher than 26℃, it is necessary to use a refrigerator or ice cubes to cool down the coating 4 cups. When the indoor temperature is less than 24℃, it is necessary to use an oven to heat up the coating 4 cups. The specific indicators are shown in the table below:

[0081]

[0082]

[0083] S6. Filter the qualified solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles tested in S5 using a 300-mesh filter cloth to obtain qualified solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles.

[0084] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

[0085] The preparation of the solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles is an application in the field of coating preparation.

[0086] In addition, compared with the high-temperature baking varnish for vehicles in the prior art, the key is to use nanomaterials with low thermal conductivity, which can effectively block the increase in the temperature inside the vehicle caused by the external heat of the vehicle, reduce the temperature inside the vehicle, and reduce the energy consumption of air conditioning, which can greatly increase the vehicle's mileage, save energy and reduce emissions, and improve the protection of the atmosphere and the environment. At the same time, it can extend the service life of the vehicle and indirectly protect the life safety of passengers. This product has high thermal insulation rate, easy construction, high construction efficiency, good surface effect, and good weather resistance, and can be widely used in original vehicles.

[0087] After the nano thermal insulation high temperature baking varnish product prepared by a preparation method of a solvent-based polymer nano thermal insulation high temperature baking varnish for vehicles is sprayed on the surface of the vehicle body, compared with the vehicle body surface after the traditional high temperature baking varnish product for vehicles is sprayed on the surface of the vehicle body, a significant thermal insulation effect can be obtained, as follows:

[0088]

Claims

1. A solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles, characterized in that The invention comprises the following materials in parts by weight: 40-60 parts of high molecular weight hydroxy acrylic resin, 20-30 parts of high molecular weight amino resin, 1-15 parts of nano material, 2-5 parts of n-butanol, 5-10 parts of xylene, 2-5 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 2-5 parts of trimethylbenzene, 0.1-5 parts of leveling agent, 0.1-2 parts of acrylate leveling agent, 0.5-1 parts of ultraviolet light absorber and 0.5-1 parts of ultraviolet light stabilizer.

2. The solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles according to claim 1, characterized in that The invention comprises the following materials in parts by weight: 30-50 parts of high molecular weight hydroxy acrylic resin, 15-30 parts of high molecular weight amino resin, 5-15 parts of nano materials, 1-3 parts of n-butanol, 1-10 parts of xylene, 2-5 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 3-7 parts of trimethylbenzene, 0.01-2 parts of leveling agent, 0.01-2 parts of acrylate leveling agent, 0.2-1 parts of ultraviolet light absorber and 0.5-2 parts of ultraviolet light stabilizer.

3. The solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles according to claim 1, characterized in that The invention comprises the following materials in parts by weight: 35-65 parts of high molecular weight hydroxy acrylic resin, 10-20 parts of high molecular weight amino resin, 5-10 parts of nano materials, 2-3 parts of n-butanol, 2-7 parts of xylene, 1-3 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 1-6 parts of trimethylbenzene, 0.05-1 parts of leveling agent, 0.05-2 parts of acrylate leveling agent, 0.1-2 parts of ultraviolet light absorber and 0.1-2 parts of ultraviolet light stabilizer.

4. The solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles according to claim 1, characterized in that The invention comprises the following materials in parts by weight: 30-60 parts of high molecular weight hydroxy acrylic resin, 10-20 parts of high molecular weight amino resin, 1-5 parts of nano material, 1-5 parts of n-butanol, 1-5 parts of xylene, 2-7 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 2-8 parts of trimethylbenzene, 0.1-2 parts of leveling agent, 0.1-2 parts of ultraviolet light absorber and 0.1-2 parts of ultraviolet light stabilizer.

5. The solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles according to any one of claims 1 to 4, characterized in that The solvent-based polymer nano heat-insulating high-temperature baking varnish for vehicles adopts a mixed resin of solvent-based hydroxyl acrylic resin and amino resin.

6. The solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles according to any one of claims 1 to 4, characterized in that The nanomaterials used in the solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles are modified ATO nano slurry, nano ITO dispersion, nano ATO dispersion, nano ITO, nano GTO thermal insulation powder, nano zirconium oxide, nano AZO, silica aerogel powder or silica aerogel paste. According to the thermal insulation performance and cost control, at least one or more combinations are used. The nanomaterial has a low thermal conductivity (after drying, 25° C.) of 0.001 to 3 W / (m·K) and a particle size of 0.1 to 20 μm.

7. The solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles according to any one of claims 1 to 4, characterized in that The leveling agent used in the solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles is a combination of three types of silicone leveling agent, acrylate leveling agent, and fluorine-modified leveling agent, or it can be any one of the above three leveling agents or a combination of any two of the above three leveling agents.

8. The solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles according to any one of claims 1 to 4, characterized in that The ultraviolet light absorber and ultraviolet light stabilizer used in the solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles should be used in combination; the solvents used in the solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles include n-butanol, xylene, propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, and trimethylbenzene.

9. An application of the solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles as claimed in any one of claims 1 to 4, characterized in that: The solvent-based polymer nano heat-insulating high-temperature baking varnish for vehicles is used in the field of coating preparation.

10. A method for preparing a solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles as claimed in any one of claims 1 to 4, characterized in that: These include: S1. Prepare raw materials and test each material according to the standards; S2, weighing high molecular hydroxy acrylic resin and high molecular amino resin by weight, slowly adding them into the container cylinder, and dispersing them at a speed of 300-500r / min for 10-20min in an explosion-proof disperser, slowly adding nanomaterials under stirring, and dispersing them at a speed of 300-500r / min for 10-20min in an explosion-proof disperser; Obtaining a mixed solution of primary nanomaterials; At the same time, in this step, 10% by weight of high molecular weight hydroxy acrylic resin is reserved to adjust the viscosity of the initial nano material mixture; S3, the viscosity, fineness and other indicators of the initial nanomaterial mixture obtained in S2 are tested. After all indicators are qualified, enter S4. When the viscosity is greater than 82s, add an appropriate amount of n-butanol or xylene in the material to lower it. When the viscosity is less than 78s, add the high molecular hydroxyl acrylic resin reserved in S2 to increase it. When measuring the viscosity, the coating of 4 cups itself is also required to be 25℃±1. When the indoor temperature is higher than 26℃, the coating of 4 cups needs to be cooled with a refrigerator or ice cubes. When the indoor temperature is less than 24℃, the coating of 4 cups needs to be heated in an oven. The specific indicators are shown in the table below: S4, weighing n-butanol, xylene, propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, trimethylbenzene, leveling agent, acrylate leveling agent, ultraviolet light absorber, ultraviolet light stabilizer by weight, slowly adding them to the qualified initial nano material mixed solution, and immediately increasing the speed of the disperser to 600-800 rpm, high-speed dispersion for 50-60 minutes, to obtain a solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles; At the same time, this step should reserve 5% by weight of n-butanol or xylene to adjust the viscosity of the solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles; S5. Test the various indicators of the solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles made by S4. When the viscosity is greater than 52s, add an appropriate amount of n-butanol or xylene reserved by S4 to lower it. When the viscosity is less than 48s, add the polymer hydroxy acrylic resin reserved by S2 to increase it. Pay special attention to the fact that when measuring the viscosity, the coating 4 cups itself is also required to be 25℃±1. When the indoor temperature is higher than 26℃, it is necessary to use a refrigerator or ice cubes to cool down the coating 4 cups. When the indoor temperature is less than 24℃, it is necessary to use an oven to heat up the coating 4 cups. The specific indicators are shown in the table below: S6. Filter the qualified solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles tested in S5 using a 300-mesh filter cloth to obtain qualified solvent-based polymer nano thermal insulation high-temperature baking varnish for vehicles.

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