High-molecular nano heat-insulation high-temperature baking water-based varnish and preparation method thereof

Abstract

The invention discloses a high-molecular nano heat-insulation high-temperature baking water-based varnish and a preparation method thereof. The coating is characterized by being prepared from 40-60 parts of macromolecular water-based acrylic resin, 4-10 parts of macromolecular water-based amino resin, 1-15 parts of a nano material, 10-30 parts of deionized water, 2-12 parts of an alcohol cosolvent, 0.1-5 parts of a flatting agent, 0.5-1 part of an ultraviolet light absorber and 0.5-1 part of an ultraviolet light stabilizer. After being sprayed and applied, the polymer nano heat-insulation high-temperature baking water-based varnish for the vehicle is high in paint film heat insulation rate, simple to manufacture and construct, high in construction efficiency, high in gloss, good in fullness, good in hardness, good in weather resistance and low in VOC emission, and has a good application prospect. According to the preparation method, a coating product with heat insulation performance, super adhesive force, high distinctness of image and high weather resistance is prepared in a simplest physical mixing and stirring mode in the field of high-molecular water-based high-temperature stoving varnish, and the method is energy-saving, time-saving and high in preparation efficiency.

Description

Technical Field

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

[0002] On 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", and on November 17, 2020, it was authorized to apply for the invention patent of "a kind of environmentally friendly water-based automotive metallic glitter paint and its preparation method", with the patent number "ZL201811169790.0", and on October 26, 2021, it was authorized to apply for the invention patent of "a kind of self-repairing water-based polyurethane coating composition and coating", with the patent number "ZL202010748471.6". Through these patented technologies, water-based varnish for vehicles can be produced, which uses hydroxyl acrylic resin, alkyd resin, polyester resin and amino resin as the main film-forming substances, adds leveling agent, drying agent, deionized water and alcohol organic solvents, and sprays them 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 refrigeration. 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, and at the same time, if the coating is applied to reduce the emission of VOCs into the atmosphere, this is a technology that is very worth studying.

[0006] In order to solve the above problems, the car body can be coated with a high-temperature baking water-based varnish with heat insulation performance when it leaves the factory, which can not only block the heat outside the car from being transferred to the car, reduce the impact of the outside temperature on the temperature inside the car, make the temperature inside the car rise slightly or not, save energy consumption, extend the vehicle's cruising range, extend the service life of the vehicle, indirectly protect the life safety of passengers, and at the same time reduce VOC emissions into the atmosphere, save energy and reduce emissions, and achieve protection of the atmosphere and the environment. After years of research and development, our company has developed a high-molecular nano-insulation high-temperature baking water-based 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 water-based varnish products for vehicles, which effectively solves the problem of reducing the energy consumption of vehicle air conditioning and reducing the emission of VOCs into the atmosphere. Summary of the invention

[0007] The purpose of the present invention is to provide a high molecular nano thermal insulation high temperature baking water-based varnish for vehicles 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 polymer nano thermal insulation high temperature baking water-based varnish for vehicles comprises the following materials in parts by weight: 40-60 parts of polymer water-based acrylic resin, 4-10 parts of polymer water-based amino resin, 1-15 parts of nanomaterials, 10-30 parts of deionized water, 2-12 parts of alcohol cosolvent, 0.1-5 parts of 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: 40-70 parts of polymer water-based acrylic resin, 4-15 parts of polymer water-based amino resin, 1-10 parts of nanomaterials, 10-20 parts of deionized water, 2-10 parts of alcohol cosolvent, 0.1-3 parts of leveling agent, 0.5-2 parts of ultraviolet absorber, and 0.3-2 parts of ultraviolet stabilizer.

[0010] As a further solution of the present invention: the following materials are included in parts by weight: 40-70 parts of polymer water-based acrylic resin, 2-15 parts of polymer water-based amino resin, 1-12 parts of nanomaterials, 5-10 parts of deionized water, 1-8 parts of alcohol cosolvent, 0.2-4 parts of leveling agent, 0.2-5 parts of ultraviolet absorber, and 0.1-3 parts of ultraviolet stabilizer.

[0011] As a further solution of the present invention: the following materials are included in parts by weight: 50-80 parts of polymer water-based acrylic resin, 5-15 parts of polymer water-based amino resin, 1-10 parts of nanomaterials, 2-10 parts of deionized water, 1-12 parts of alcohol cosolvent, 0.1-3 parts of leveling agent, 0.1-3 parts of ultraviolet absorber, and 0.1-5 parts of ultraviolet 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] As a further embodiment of the present invention: the alcohol co-solvent is n-butanol, isobutanol or isopropanol.

[0015] As a further solution of the present invention: the deionized water is obtained by an industrial pure water machine.

[0016] A method for preparing the above-mentioned polymer nano thermal insulation high-temperature baking water-based varnish for vehicles comprises the following steps:

[0017] S1. Prepare raw materials and test each material according to the standards to ensure the quality and stability of the product;

[0018] S2, weighing polymer water-based acrylic resin and polymer water-based amino resin by weight, slowly adding them into a container, and dispersing them in an explosion-proof disperser at a speed of 300-500r / min for 10-20min, slowly adding nanomaterials under stirring, and dispersing them in an explosion-proof disperser at a speed of 300-500r / min for 10-20min; obtaining a primary nanomaterial mixed solution;

[0019] Note: In this step, 10% by weight of high molecular weight water-based acrylic resin should be reserved to adjust the viscosity of the initial nanomaterial mixture;

[0020] S3, test the viscosity, fineness and other indicators of the initial nanomaterial mixture obtained in S2. When all indicators are qualified, proceed to the next step. When the viscosity is greater than 82s, add an appropriate amount of deionized water in the material to lower it. When the viscosity is less than 78s, add the high molecular water-based acrylic resin reserved in S2 to increase it. Pay special attention to the fact that 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 with an oven. The specific indicators are shown in the table below:

[0021]

[0022] S4, weigh deionized water, alcohol cosolvent, leveling agent, ultraviolet absorber, and ultraviolet stabilizer by weight, slowly add them to the nano material mixture, and immediately increase the speed of the disperser to 600-800 rpm, and disperse at high speed for 50-60 minutes to obtain a polymer nano thermal insulation high temperature baking water-based varnish;

[0023] At the same time, this step should reserve 5% by weight of deionized water to adjust the viscosity of the polymer nano thermal insulation high temperature baking water-based varnish for vehicles;

[0024] S5. Test various indicators of the polymer nano thermal insulation high temperature baking water-based varnish prepared by S4. When the viscosity is greater than 52s, add an appropriate amount of deionized water reserved by S4 to lower it. When the viscosity is less than 48s, add the polymer water-based acrylic resin reserved by 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℃, it is necessary to use a refrigerator or ice cubes to cool down the coating of 4 cups. When the indoor temperature is less than 24℃, it is necessary to use an oven to heat up the coating of 4 cups. Specific indicators are shown in the table below:

[0025]

[0026] S6. Filter the qualified polymer nano thermal insulation high temperature baking water-based varnish detected in S5 using a 300-mesh filter cloth to obtain a qualified polymer nano thermal insulation high temperature baking water-based varnish.

[0027] The above-mentioned polymer nano thermal insulation high temperature baking water-based varnish is used in the field of coating preparation.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: a high-molecular nano-insulation high-temperature baking water-based varnish for vehicles is realized, and a high-molecular water-based acrylic resin and a high-molecular water-based amino resin are used as main materials. By adding nano-materials, deionized water, a leveling agent, an ultraviolet light absorber and an ultraviolet light stabilizer, a high-temperature baking water-based varnish with high insulation rate, good leveling, high fullness, high hardness, high gloss, good weather resistance and low VOC content can be prepared. When sprayed on a vehicle, it can block the heat outside the vehicle from being transferred to the inside of the vehicle, reduce the influence of the outside temperature on the temperature inside the vehicle, make the temperature inside the vehicle rise slightly or not rise, reduce the temperature inside the vehicle, save electricity, increase the vehicle's cruising range, extend the service life of the vehicle, protect the lives of passengers, and at the same time reduce VOC emissions, achieve energy conservation and emission reduction, and improve the protection of the atmosphere and the environment. This product has high thermal insulation, is easy to construct, has high construction efficiency, good surface effect, good weather resistance, low VOC content and low emissions. It can be widely used in original vehicle spraying, baked at 130-160℃ for 30 minutes to dry, and has high construction efficiency. DETAILED DESCRIPTION

[0029] 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.

[0030] Implementation Example 1

[0031] A preparation method for a polymer nano thermal insulation high temperature baking water-based varnish for vehicles comprises the following materials in parts by weight: 40-60 parts of a polymer water-based acrylic resin, 4-10 parts of a polymer water-based amino resin, 1-15 parts of a nano material, 10-30 parts of deionized water, 2-12 parts of an alcohol cosolvent, 0.1-5 parts of a leveling agent, 0.5-1 parts of an ultraviolet light absorber, and 0.5-1 parts of an ultraviolet light stabilizer.

[0032] Specifically, in this embodiment, the polymer water-based acrylic resin is a water-based acrylic resin with a solid content of 40-60%, a hydroxyl value of 2.0-4.0, a drying temperature of the resin is greater than 130°C, and a baking drying time is less than 30 minutes; it can be imported or domestic;

[0033] Specifically, in this embodiment, the polymer water-based amino resin is an amino resin with a solid content of 40-60%. 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;

[0034] 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.

[0035] As a further embodiment of the present invention: the alcohol co-solvent is n-butanol, isobutanol or isopropanol.

[0036] As a further solution of the present invention: the deionized water is obtained by an industrial pure water machine.

[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] A preparation method for a polymer nano thermal insulation high temperature baking water-based varnish for vehicles comprises the following materials in parts by weight: 40-70 parts of a polymer water-based acrylic resin, 4-15 parts of a polymer water-based amino resin, 1-10 parts of a nano material, 10-20 parts of deionized water, 2-10 parts of an alcohol cosolvent, 0.1-3 parts of a leveling agent, 0.5-2 parts of an ultraviolet light absorber, and 0.3-2 parts of an ultraviolet light stabilizer.

[0041] Specifically, in this embodiment, the polymer water-based acrylic resin is a water-based acrylic resin with a solid content of 40-60%, a hydroxyl value of 2.0-4.0, a drying temperature of the resin is greater than 130°C, and a baking drying time is less than 30 minutes; it can be imported or domestic;

[0042] Specifically, in this embodiment, the polymer water-based amino resin is an amino resin with a solid content of 40-60%. 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] As a further embodiment of the present invention: the alcohol co-solvent is n-butanol, isobutanol or isopropanol.

[0045] As a further solution of the present invention: the deionized water is obtained by an industrial pure water machine.

[0046] 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;

[0047] Specifically, in this embodiment, the ultraviolet light absorber and ultraviolet light stabilizer can be products of manufacturers such as Taiwan Yongguang;

[0048] Implementation Example 3

[0049] A preparation method for a polymer nano thermal insulation high temperature baking water-based varnish for vehicles comprises the following materials in parts by weight: 40-70 parts of a polymer water-based acrylic resin, 2-15 parts of a polymer water-based amino resin, 1-12 parts of a nano material, 5-10 parts of deionized water, 1-8 parts of an alcohol cosolvent, 0.2-4 parts of a leveling agent, 0.2-5 parts of an ultraviolet light absorber, and 0.1-3 parts of an ultraviolet light stabilizer.

[0050] Specifically, in this embodiment, the polymer water-based acrylic resin is a water-based acrylic resin with a solid content of 40-60%, a hydroxyl value of 2.0-4.0, a drying temperature of the resin is greater than 130°C, and a baking drying time is less than 30 minutes; it can be imported or domestic;

[0051] Specifically, in this embodiment, the polymer water-based amino resin is an amino resin with a solid content of 40-60%. 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;

[0052] 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.

[0053] As a further embodiment of the present invention: the alcohol co-solvent is n-butanol, isobutanol or isopropanol.

[0054] As a further solution of the present invention: the deionized water is obtained by an industrial pure water machine.

[0055] 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;

[0056] Specifically, in this embodiment, the ultraviolet light absorber and ultraviolet light stabilizer can be products of manufacturers such as Taiwan Yongguang;

[0057] Implementation Example 4

[0058] The invention discloses a preparation method for a polymer nano thermal insulation high temperature baking water-based varnish for vehicles, comprising the following materials in parts by weight: 50-80 parts of a polymer water-based acrylic resin, 5-15 parts of a polymer water-based amino resin, 1-10 parts of a nano material, 2-10 parts of deionized water, 1-12 parts of an alcohol cosolvent, 0.1-3 parts of a leveling agent, 0.1-3 parts of an ultraviolet light absorber, and 0.1-5 parts of an ultraviolet light stabilizer.

[0059] Specifically, in this embodiment, the polymer water-based acrylic resin is a water-based acrylic resin with a solid content of 40-60%, a hydroxyl value of 2.0-4.0, a drying temperature of the resin is greater than 130°C, and a baking drying time is less than 30 minutes; it can be imported or domestic;

[0060] Specifically, in this embodiment, the polymer water-based amino resin is an amino resin with a solid content of 40-60%. 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;

[0061] 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.

[0062] As a further embodiment of the present invention: the alcohol co-solvent is n-butanol, isobutanol or isopropanol.

[0063] As a further solution of the present invention: the deionized water is obtained by an industrial pure water machine.

[0064] 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;

[0065] Specifically, in this embodiment, the ultraviolet light absorber and ultraviolet light stabilizer can be products of manufacturers such as Taiwan Yongguang;

[0066] A method for preparing the above-mentioned polymer nano thermal insulation high-temperature baking water-based varnish for vehicles comprises the following steps:

[0067] S1. Prepare raw materials and test each material according to the standards to ensure the quality and stability of the product;

[0068] S2, weighing polymer water-based acrylic resin and polymer water-based amino resin by weight, slowly adding them into a container, and dispersing them in an explosion-proof disperser at a speed of 300-500r / min for 10-20min, slowly adding nanomaterials under stirring, and dispersing them in an explosion-proof disperser at a speed of 300-500r / min for 10-20min; obtaining a primary nanomaterial mixed solution;

[0069] Note: In this step, 10% by weight of high molecular weight water-based acrylic resin should be reserved to adjust the viscosity of the initial nanomaterial mixture;

[0070] S3, test the viscosity, fineness and other indicators of the initial nanomaterial mixture obtained in S2. When all indicators are qualified, proceed to the next step. When the viscosity is greater than 82s, add an appropriate amount of deionized water in the material to lower it. When the viscosity is less than 78s, add the high molecular water-based acrylic resin reserved in S2 to increase it. Pay special attention to the fact that 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 with an oven. The specific indicators are shown in the table below:

[0071]

[0072] S4, weigh deionized water, alcohol cosolvent, leveling agent, ultraviolet absorber, and ultraviolet stabilizer by weight, slowly add them to the nano material mixture, and immediately increase the speed of the disperser to 600-800 rpm, and disperse at high speed for 50-60 minutes to obtain a polymer nano thermal insulation high temperature baking water-based varnish;

[0073] At the same time, this step should reserve 5% by weight of deionized water to adjust the viscosity of the polymer nano thermal insulation high temperature baking water-based varnish for vehicles;

[0074] S5. Test various indicators of the polymer nano thermal insulation high temperature baking water-based varnish prepared by S4. When the viscosity is greater than 52s, add an appropriate amount of deionized water reserved by S4 to lower it. When the viscosity is less than 48s, add the polymer water-based acrylic resin reserved by 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℃, it is necessary to use a refrigerator or ice cubes to cool down the coating of 4 cups. When the indoor temperature is less than 24℃, it is necessary to use an oven to heat up the coating of 4 cups. Specific indicators are shown in the table below:

[0075]

[0076]

[0077] S6. Filter the qualified polymer nano thermal insulation high temperature baking water-based varnish detected in S5 using a 300-mesh filter cloth to obtain a qualified polymer nano thermal insulation high temperature baking water-based varnish.

[0078] 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.

[0079] The preparation of the above-mentioned polymer nano thermal insulation high-temperature baking water-based varnish for vehicles is an application in the field of coating preparation.

[0080] 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, high thermal insulation, good leveling, high fullness, high hardness, high gloss, good weather resistance, and low VOC content. It can not only block the heat outside the car from being transferred to the car, reduce the impact of the outside temperature on the temperature inside the car, and make the temperature inside the car rise slightly or not, lower the temperature inside the car, save electricity, increase the vehicle's cruising range, extend the vehicle's service life, and protect the safety of passengers, but also reduce VOC emissions, achieve energy conservation and emission reduction, and improve the protection of the atmosphere and the environment. This product has high thermal insulation, easy construction, high construction efficiency, good surface effect, good weather resistance, and low VOC emissions, and can be widely used in original vehicles.

[0081] The comparison of the external and internal temperatures of a vehicle after a high-temperature baking varnish product prepared by a method for preparing a polymer nano thermal insulation high-temperature baking water-based varnish for a vehicle is sprayed on the vehicle body surface and a high-temperature baking varnish product for an ordinary vehicle is sprayed on the vehicle body surface, as follows:

[0082]

[0083] It can be seen from the above table that the use of the polymer nano thermal insulation high-temperature baking water-based varnish for vehicles of the present invention can achieve a significant thermal insulation effect.

Claims

1. A high molecular nano thermal insulation high temperature baking water-based varnish for vehicles, characterized in that The invention comprises the following materials in parts by weight: 40-60 parts of high molecular water-based acrylic resin, 4-10 parts of high molecular water-based amino resin, 1-15 parts of nanometer material, 10-30 parts of deionized water, 2-12 parts of alcohol auxiliary solvent, 0.1-5 parts of leveling agent, 0.5-1 parts of ultraviolet light absorber and 0.5-1 parts of ultraviolet light stabilizer.

2. The vehicle-use polymer nano thermal insulation high temperature baking water-based varnish according to claim 1, characterized in that The invention comprises the following materials in parts by weight: 40-70 parts of high molecular water-based acrylic resin, 4-15 parts of high molecular water-based amino resin, 1-10 parts of nanometer material, 10-20 parts of deionized water, 2-10 parts of alcohol auxiliary solvent, 0.1-3 parts of leveling agent, 0.5-2 parts of ultraviolet light absorber and 0.3-2 parts of ultraviolet light stabilizer.

3. The vehicle-use polymer nano thermal insulation high temperature baking water-based varnish according to claim 1, characterized in that The invention comprises the following materials in parts by weight: 40-70 parts of high molecular water-based acrylic resin, 2-15 parts of high molecular water-based amino resin, 1-12 parts of nanometer material, 5-10 parts of deionized water, 1-8 parts of alcohol auxiliary solvent, 0.2-4 parts of leveling agent, 0.2-5 parts of ultraviolet light absorber and 0.1-3 parts of ultraviolet light stabilizer.

4. The vehicle-use polymer nano thermal insulation high temperature baking water-based varnish according to claim 1, characterized in that The invention comprises the following materials in parts by weight: 50-80 parts of high molecular water-based acrylic resin, 5-15 parts of high molecular water-based amino resin, 1-10 parts of nanomaterials, 2-10 parts of deionized water, 1-12 parts of alcohol auxiliary solvent, 0.1-3 parts of leveling agent, 0.1-3 parts of ultraviolet light absorber and 0.1-5 parts of ultraviolet light stabilizer.

5. The polymer nano thermal insulation high temperature baking water-based varnish for vehicles according to any one of claims 1 to 4, characterized in that The vehicle polymer nano thermal insulation high temperature baking water-based varnish adopts a mixed resin of polymer water-based acrylic resin with a resin solid content of 40-60% and amino resin with a solid content of 40-60%. The drying temperature of the mixed resin is greater than 130° C. and the baking drying time is less than 30 minutes.

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

8. The polymer nano thermal insulation high temperature baking water-based 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 high-molecular nano thermal insulation high-temperature baking water-based varnish for vehicles should be used in combination; The alcohol cosolvent used in the polymer nano thermal insulation high temperature baking water-based varnish for vehicles is n-butanol, isobutanol or isopropanol; the deionized water used in the polymer nano thermal insulation high temperature baking water-based varnish for vehicles is prepared by an industrial pure water machine.

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

10. A method for preparing the polymer solvent-based nano thermal insulation high-temperature baking varnish for vehicles as claimed in any one of claims 1 to 4, characterized in that : It includes the following steps: S1. Prepare raw materials and test each material according to the standards to ensure the quality and stability of the product; S2, weighing polymer water-based acrylic resin and polymer water-based amino resin by weight, slowly adding them into the container cylinder, and dispersing them in an explosion-proof disperser at a speed of 300-500r / min for 10-20min, slowly adding nanomaterials under stirring, and dispersing them in an explosion-proof disperser at a speed of 300-500r / min for 10-20min; Obtaining a mixed solution of primary nanomaterials; At the same time, in this step, 10% by weight of a high molecular weight aqueous 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 prepared in S2 are tested. When all indicators are qualified, proceed to the next step. When the viscosity is greater than 82s, add an appropriate amount of deionized water in the material to lower it. When the viscosity is less than 78s, add the high molecular water-based 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, weigh deionized water, alcohol cosolvent, leveling agent, ultraviolet absorber, and ultraviolet stabilizer by weight, slowly add them to the nano material mixture, and immediately increase the speed of the disperser to 600-800 rpm, and disperse at high speed for 50-60 minutes to obtain a polymer nano thermal insulation high temperature baking water-based varnish; At the same time, in this step, 5% by weight of deionized water is reserved to adjust the viscosity of the polymer nano thermal insulation high temperature baking water-based varnish for vehicles. S5. Test various indicators of the polymer nano thermal insulation high temperature baking water-based varnish prepared by S4. When the viscosity is greater than 52s, add an appropriate amount of deionized water reserved by S4 to lower it. When the viscosity is less than 48s, add the polymer water-based acrylic resin reserved by 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℃, it is necessary to use a refrigerator or ice cubes to cool down the coating of 4 cups. When the indoor temperature is less than 24℃, it is necessary to use an oven to heat up the coating of 4 cups. Specific indicators are shown in the table below: S6. Filter the qualified polymer nano thermal insulation high temperature baking water-based varnish detected in S5 using a 300-mesh filter cloth to obtain a qualified polymer nano thermal insulation high temperature baking water-based varnish.

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