Solvent type polymer nanometer heat insulation varnish for vehicle appearance repair

Abstract

The invention relates to the technical field of coating preparation, and particularly discloses a solvent type polymer nano heat insulation varnish for vehicle appearance repair. The paint is characterized by being prepared from 30-50 parts of high-molecular hydroxy acrylic resin, 0-30 parts of high-molecular saturated polyester resin, 0-20 parts of high-molecular alkyd resin, 1-15 parts of a nano material, 5-10 parts of n-butyl acetate, 5-10 parts of xylene, 5-10 parts of propylene glycol methyl ether acetate or ethylene glycol monoethyl ether acetate, 1-5 parts of methyl isobutyl ketone and 1-5 parts of dibasic acid ester. According to the paint, heat insulation of a paint film is achieved, the mixed resin of the high-molecular hydroxy acrylic resin, the high-molecular alkyd resin and the high-molecular saturated polyester resin is used as a film forming matter, the heat insulation effect of the paint film is achieved by adding the nano material, and the paint film has the advantages of being high in heat insulation performance, good in heat insulation effect and good in heat insulation effect. And the coating product with heat insulation performance and excellent aging resistance is prepared in the simplest physical mixing and stirring mode in the field of taking the solvent type polymer hydroxy acrylic resin as a film forming matter, and the method is energy-saving and time-saving, and ultrahigh in preparation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle polymer coating preparation, in particular to a solvent-based polymer nano thermal insulation varnish for vehicle appearance repair 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, a varnish with heat insulation performance is applied on the car body and car glass to block the heat outside the car from being transferred into 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 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 varnish for vehicle exterior repair and its preparation method, and at the same time transformed the preparation method into a set of nano-insulation 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 varnish for vehicle exterior repair 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 varnish for vehicle exterior repair comprises the following materials in parts by weight: 30-50 parts of polymer hydroxy acrylic resin, 0-30 parts of polymer saturated polyester resin, 0-20 parts of polymer alkyd resin, 1-15 parts of nano materials, 5-10 parts of n-butyl acetate, 5-10 parts of xylene, 5-10 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 1-5 parts of methyl isobutyl ketone, 1-5 parts of dibasic acid ester, 0-10 parts of other organic cosolvents, 0.1-5 parts of leveling agent, 0.5-3 parts of drying agent and 0.5-1 parts of adhesion promoter.

[0009] As a further scheme of the present invention: the following materials are included in parts by weight: 40-60 parts of high molecular weight hydroxy acrylic resin, 5-20 parts of high molecular weight saturated polyester resin, 1-10 parts of nanomaterials, 2-8 parts of n-butyl acetate, 2-8 parts of xylene, 2-5 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 1-5 parts of other organic co-solvents, 0.1-5 parts of leveling agent, and 0.5-3 parts of drying agent.

[0010] 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, 1-15 parts of polymer saturated polyester resin, 1-5 parts of polymer alkyd resin, 1-15 parts of nanomaterials, 5-10 parts of n-butyl acetate, 2-8 parts of xylene, 2-8 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 1-5 parts of other organic co-solvents, 0.1-5 parts of leveling agent, and 0.5-3 parts of drying agent.

[0011] As a further scheme of the present invention: the following materials are included in parts by weight: 40-60 parts of polymer hydroxy acrylic resin, 1-15 parts of polymer alkyd resin, 1-10 parts of nanomaterials, 4-8 parts of n-butyl acetate, 2-8 parts of xylene, 1-5 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 1-5 parts of other organic co-solvents, 0.1-5 parts of leveling agent, and 0.5-3 parts of drying agent.

[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 silicone leveling agent, an acrylate leveling agent, or a fluorine-modified leveling agent, and the above leveling agents are used alone or in combination of two or three.

[0014] As a further solution of the present invention: the drier is an organotin drier.

[0015] As a further solution of the present invention: the adhesion promoter is a silane coupling agent.

[0016] The preparation of the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair comprises the following steps:

[0017] The following steps are involved:

[0018] S1. Prepare raw materials and test each material according to the standards;

[0019] S2. Weigh the high molecular weight hydroxy acrylic resin by weight and slowly add it into the container, and slowly add 50% of the drying agent while stirring, and disperse it at a speed of 300-500r / min in an explosion-proof disperser for 10-20min, and slowly add the nano material while stirring, and disperse it at a speed of 300-500r / min in an explosion-proof disperser for 10-20min; obtain the initial nano material mixture;

[0020] 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;

[0021] 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 xylene or n-butyl acetate in the material to lower it. When the viscosity is less than 78s, add the high molecular hydroxy 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 in an oven. The specific indicators are shown in the table below:

[0022]

[0023] S4, weighing polymer saturated polyester resin, polymer alkyd resin, n-butyl acetate, xylene, propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, methyl isobutyl ketone, dibasic acid ester, other organic cosolvents, leveling agent, drying agent, adhesion promoter by weight, slowly adding the initial nano material mixture, 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 varnish for vehicle exterior repair;

[0024] At the same time, this step should reserve 5% by weight of n-butyl acetate or xylene to adjust the viscosity of the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair;

[0025] S5. Test various indicators of the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair prepared by S4. When the viscosity is greater than 52s, add appropriate amount of xylene or n-butyl acetate in the material to lower it. When the viscosity is less than 48s, add the polymer hydroxy acrylic resin reserved in 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℃, the coating 4 cups needs to be cooled with a refrigerator or ice cubes. When the indoor temperature is less than 24℃, the coating 4 cups needs to be heated in an oven. See the table below for specific indicators:

[0026]

[0027]

[0028] S6. Filter the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair that has passed the test in S5 using a 300-mesh filter cloth to obtain a qualified solvent-based polymer nano thermal insulation varnish for vehicle exterior repair.

[0029] The above-mentioned solvent-based polymer nano thermal insulation varnish for vehicle appearance repair is used in the field of coating preparation.

[0030] Compared with the prior art, the beneficial effects of the present invention are: a solvent-based polymer nano thermal insulation varnish for vehicle exterior repair is realized, and the polymer solvent-based hydroxy acrylic resin, saturated polyester resin, and alkyd resin are used as the main materials, and the ratio of nano materials, various solvents, leveling agents, and drying agents is adjusted, and mixed according to certain detection indicators such as viscosity, fineness, and appearance color. It can prepare a varnish with high thermal insulation rate, good leveling, high fullness, high hardness, high gloss, and good weather resistance. After spraying, it blocks the heat outside the car from being transferred to the car, reduces the influence of the temperature outside the car on the temperature inside the car, and makes the temperature inside the car rise slightly or not, reduces the temperature inside the car, saves electricity, increases the vehicle's cruising range, achieves energy conservation and emission reduction, and improves 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. The product has high thermal insulation rate, easy construction, high construction efficiency, good surface effect, and good weather resistance, and can be widely used in vehicle repair. The invention uses a mixed resin of high molecular weight hydroxy acrylic resin, high molecular weight alkyd resin and high molecular weight saturated polyester resin as a film-forming material, and achieves the heat insulation effect of the paint film by adding nano materials. In the field where the solvent-based high molecular weight hydroxy acrylic resin is a film-forming material, a coating product having both heat insulation performance and excellent aging resistance can be prepared in the simplest physical mixing and stirring method. The method is energy-saving and time-saving, and has high preparation efficiency. DETAILED DESCRIPTION

[0031] 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.

[0032] Implementation Example 1

[0033] The invention discloses a preparation method for solvent-based polymer nano thermal insulation varnish for vehicle exterior repair, comprising the following materials in parts by weight: 30-50 parts of polymer hydroxy acrylic resin, 0-30 parts of polymer saturated polyester resin, 0-20 parts of polymer alkyd resin, 1-15 parts of nano material, 5-10 parts of n-butyl acetate, 5-10 parts of xylene, 5-10 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 0-10 parts of other organic cosolvents, 0.1-5 parts of leveling agent, 0.5-3 parts of drying agent and 0.5-1 parts of adhesion promoter.

[0034] Specifically, in this embodiment, the polymer hydroxyl acrylic resin uses a hydroxyl acrylic resin with a solid content of 60-80% and a hydroxyl value of 2.0-5.0. The drying temperature of the resin cannot be higher than 80°C, and the self-drying time is less than 8 hours at 25°C.

[0035] Specifically, in this embodiment, the high molecular weight saturated polyester resin is a saturated polyester resin with a solid content of 50-80% and a hydroxyl value of 3.0-5.0. The drying temperature of the resin cannot be higher than 80°C, and the self-drying time is less than 8 hours at 25°C. It can be imported or domestically produced;

[0036] Specifically, in this embodiment, the polymer alkyd resin is a drying oil alkyd resin, the drying temperature of the resin cannot be higher than 80°C, and the self-drying time is less than 8 hours at 25°C.

[0037] 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.

[0038] Specifically, in this embodiment, the n-butyl acetate has a purity of 99.5% or more and a moisture content of less than 500 ppm, and can be produced by any manufacturer;

[0039] 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;

[0040] Specifically, in this embodiment, the propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate has a purity of more than 98% and a moisture content of less than 500 ppm, and can be produced by any manufacturer;

[0041] Specifically, in this embodiment, the other organic solvent is methyl isobutyl ketone, dibasic acid ester, etc., with a water content of less than 500ppm, and any manufacturer can be used;

[0042] Specifically, in this embodiment, the leveling agent is a silicone leveling agent, a polyester leveling agent, a fluorine-modified leveling agent, and products of manufacturers such as BYK, BASF, and Axal can be used;

[0043] Specifically, in this embodiment, the drier is an organic tin drier, and any manufacturer's product may be used;

[0044] Specifically, in this embodiment, the adhesion promoter is a silane coupling agent, and any manufacturer's product can be used;

[0045] Implementation Example 2

[0046] A preparation method for a solvent-based polymer nano thermal insulation varnish for vehicle exterior repair includes the following materials in parts by weight: 50 parts of polymer hydroxy acrylic resin, 20 parts of polymer saturated polyester resin, 10 parts of nano materials, 8 parts of n-butyl acetate, 5 parts of xylene, 2 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 4 parts of other organic cosolvents, 2 parts of leveling agent, 1 part of drying agent, and 0.5-1 part of adhesion promoter.

[0047] Specifically, in this embodiment, the high molecular weight hydroxy acrylic resin has a resin solid content of 60-80% and a hydroxyl value of 2.0-5.0. The drying temperature of the resin cannot be higher than 80°C, and the self-drying time is less than 8 hours at 25°C.

[0048] Specifically, in this embodiment, the high molecular weight saturated polyester resin has a resin solid content of 60-80% and a hydroxyl value of 3.0-5.0. The drying temperature of the resin cannot be higher than 80°C, and the self-drying time is less than 8 hours at 25°C.

[0049] 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.

[0050] Specifically, in this embodiment, the n-butyl acetate has a purity of 99.5% or more and a moisture content of less than 500 ppm, and can be produced by any manufacturer;

[0051] 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;

[0052] Specifically, in this embodiment, the propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate has a purity of more than 98% and a moisture content of less than 500 ppm, and can be produced by any manufacturer;

[0053] Specifically, in this embodiment, the other organic solvent is methyl isobutyl ketone, dibasic acid ester, etc., with a water content of less than 500ppm, and any manufacturer can be used;

[0054] Specifically, in this embodiment, the leveling agent is a silicone leveling agent, a polyester leveling agent, a fluorine-modified leveling agent; products of manufacturers such as BYK, BASF, and Axal can be used;

[0055] Specifically, in this embodiment, the drier is an organic tin drier, and any manufacturer's product may be used;

[0056] Specifically, in this embodiment, the adhesion promoter is a silane coupling agent, and any manufacturer's product can be used;

[0057] Implementation Example 3

[0058] A preparation method for a solvent-based polymer nano thermal insulation varnish for vehicle exterior repair comprises the following materials in parts by weight: 60 parts of polymer hydroxy acrylic resin, 10 parts of polymer saturated polyester resin, 5 parts of polymer alkyd resin, 10 parts of nanomaterials, 5 parts of n-butyl acetate, 2 parts of xylene, 2 parts of propylene glycol methyl ether acetate, 2 parts of other organic cosolvents, 2 parts of leveling agents, 2 parts of drying agents, and 0.5-1 parts of adhesion promoters.

[0059] Specifically, in this embodiment, the high molecular weight hydroxy acrylic resin has a resin solid content of 60-80% and a hydroxyl value of 2.0-5.0. The drying temperature of the resin cannot be higher than 80°C, and the self-drying time is less than 8 hours at 25°C.

[0060] Specifically, in this embodiment, the high molecular weight polyester resin has a resin solid content of 60-80% and a hydroxyl value of 3.0-5.0. The drying temperature of the resin cannot be higher than 80° C., and the self-drying time is less than 8 hours at 25° C.

[0061] Specifically, in this embodiment, the polymer alkyd resin is a drying oil alkyd resin, the drying temperature of the resin cannot be higher than 80°C, and the self-drying time is less than 8 hours at 25°C;

[0062] 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.

[0063] Specifically, in this embodiment, the n-butyl acetate has a purity of 99.5% or more and a moisture content of less than 500 ppm, and can be produced by any manufacturer;

[0064] 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;

[0065] Specifically, in this embodiment, the propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate has a purity of more than 98% and a moisture content of less than 500 ppm, and can be produced by any manufacturer;

[0066] Specifically, in this embodiment, the other organic solvent is methyl isobutyl ketone, dibasic acid ester, etc., with a water content of less than 500ppm, and any manufacturer can be used;

[0067] Specifically, in this embodiment, the leveling agent is a silicone leveling agent, a polyester leveling agent, a fluorine-modified leveling agent; products of manufacturers such as BYK, BASF, and Axal can be used;

[0068] Specifically, in this embodiment, the drier is an organic tin drier, and any manufacturer's product may be used;

[0069] Specifically, in this embodiment, the adhesion promoter is a silane coupling agent, and any manufacturer's product can be used;

[0070] Implementation Example 4

[0071] A preparation method for a solvent-based polymer nano thermal insulation varnish for vehicle exterior repair includes the following materials in parts by weight: 65 parts of polymer hydroxy acrylic resin, 10 parts of polymer alkyd resin, 10 parts of nano material, 5 parts of n-butyl acetate, 2 parts of xylene, 2 parts of propylene glycol methyl ether acetate, 2 parts of other organic cosolvents, 2 parts of leveling agent, 2 parts of drying agent, and 0.5-1 part of adhesion promoter.

[0072] Specifically, in this embodiment, the high molecular weight hydroxy acrylic resin has a resin solid content of 60-80% and a hydroxyl value of 2.0-5.0. The drying temperature of the resin cannot be higher than 80°C, and the self-drying time is less than 8 hours at 25°C.

[0073] Specifically, in this embodiment, the polymer alkyd resin is a drying oil alkyd resin, the drying temperature of the resin cannot be higher than 80°C, and the self-drying time is less than 8 hours at 25°C;

[0074] 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.

[0075] Specifically, in this embodiment, the n-butyl acetate has a purity of 99.5% or more and a moisture content of less than 500 ppm, and can be produced by any manufacturer;

[0076] 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;

[0077] Specifically, in this embodiment, the propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate has a purity of more than 98% and a moisture content of less than 500 ppm, and can be produced by any manufacturer;

[0078] Specifically, in this embodiment, the other organic solvent is methyl isobutyl ketone, dibasic acid ester, etc., with a water content of less than 500ppm, and any manufacturer can be used;

[0079] Specifically, in this embodiment, the leveling agent is a silicone leveling agent, a polyester leveling agent, a fluorine-modified leveling agent; products of manufacturers such as BYK, BASF, and Axal can be used;

[0080] Specifically, in this embodiment, the drier is an organic tin drier, and any manufacturer's product may be used;

[0081] Specifically, in this embodiment, the adhesion promoter is a silane coupling agent, and any manufacturer's product can be used;

[0082] The preparation of the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair also includes the following steps:

[0083] S1. Prepare raw materials and test each material according to the standards;

[0084] S2. Weigh the high molecular weight hydroxy acrylic resin by weight and slowly add it into the container, and slowly add 50% of the drying agent while stirring, and disperse it at a speed of 300-500r / min in an explosion-proof disperser for 10-20min, and slowly add the nano material while stirring, and disperse it at a speed of 300-500r / min in an explosion-proof disperser for 10-20min; obtain the initial nano material mixture;

[0085] 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;

[0086] 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 xylene or n-butyl acetate in the material to lower it. When the viscosity is less than 78s, add the high molecular hydroxy 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 in an oven. The specific indicators are shown in the table below:

[0087]

[0088] S4, weighing polymer saturated polyester resin, polymer alkyd resin, n-butyl acetate, xylene, propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, methyl isobutyl ketone, dibasic acid ester, other organic cosolvents, leveling agent, drying agent, adhesion promoter by weight, slowly adding the initial nano material mixture, 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 varnish for vehicle exterior repair;

[0089] At the same time, this step should reserve 5% by weight of n-butyl acetate or xylene to adjust the viscosity of the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair;

[0090] S5. Test various indicators of the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair prepared by S4. When the viscosity is greater than 52s, add appropriate amount of xylene or n-butyl acetate in the material to lower it. When the viscosity is less than 48s, add the polymer hydroxy acrylic resin reserved in 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℃, the coating 4 cups needs to be cooled with a refrigerator or ice cubes. When the indoor temperature is less than 24℃, the coating 4 cups needs to be heated in an oven. See the table below for specific indicators:

[0091]

[0092] S6. Filter the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair that has passed the test in S5 using a 300-mesh filter cloth to obtain a qualified solvent-based polymer nano thermal insulation varnish for vehicle exterior repair.

[0093] 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.

[0094] The preparation of the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair is an application in the field of coating preparation or other uses.

[0095] In addition, compared with the vehicle paint in the prior art, the key is to use nano-silicon dioxide aerogel powder or nano-silicon dioxide aerogel paste 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 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 the passengers. The product has high thermal insulation rate, easy construction, high construction efficiency, good surface effect, and good weather resistance, and can be widely used in vehicle repair.

[0096] The comparison of the external and internal temperatures of a vehicle after a varnish product prepared by a method for preparing a solvent-based polymer nano thermal insulation varnish for vehicle exterior repair is sprayed on the vehicle body surface and a varnish product for ordinary vehicles is sprayed on the vehicle body surface, as follows:

[0097]

[0098] It can be seen from the above table that the use of the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair of the present invention can achieve a significant thermal insulation effect.

Claims

1. A solvent-based polymer nano thermal insulation varnish for vehicle exterior repair, characterized in that The invention comprises the following materials in parts by weight: 30-50 parts of polymer hydroxy acrylic resin, 0-30 parts of polymer saturated polyester resin, 0-20 parts of polymer alkyd resin, 1-15 parts of nanomaterials, 5-10 parts of n-butyl acetate, 5-10 parts of xylene, 5-10 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 1-5 parts of methyl isobutyl ketone, 1-5 parts of dibasic acid ester, 0-10 parts of other organic cosolvents, 0.1-5 parts of leveling agent, 0.5-3 parts of drying agent and 0.5-1 parts of adhesion promoter.

2. The solvent-based polymer nano thermal insulation varnish for vehicle exterior repair according to claim 1, characterized in that The invention comprises the following materials in parts by weight: 50-70 parts of high molecular weight hydroxy acrylic resin, 1-25 parts of high molecular weight saturated polyester resin, 1-15 parts of nano materials, 5-10 parts of n-butyl acetate, 5-10 parts of xylene, 5-10 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 0-10 parts of other organic cosolvents, 0.1-5 parts of leveling agent, 0.5-3 parts of drying agent and 0.5-1 parts of adhesion promoter.

3. The solvent-based polymer nano thermal insulation varnish for vehicle exterior repair 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, 1-25 parts of high molecular weight alkyd resin, 1-15 parts of nano materials, 5-10 parts of n-butyl acetate, 5-10 parts of xylene, 5-10 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 0-10 parts of other organic cosolvents, 0.1-5 parts of leveling agent, 0.5-3 parts of drying agent and 0.5-1 parts of adhesion promoter.

4. The solvent-based polymer nano thermal insulation varnish for vehicle exterior repair according to claim 1, characterized in that The invention comprises the following materials in parts by weight: 20-40 parts of polymer hydroxy acrylic resin, 1-15 parts of polymer saturated polyester resin, 1-10 parts of polymer alkyd resin, 1-15 parts of nanomaterials, 5-10 parts of n-butyl acetate, 5-10 parts of xylene, 5-10 parts of propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, 0-10 parts of other organic cosolvents, 0.1-5 parts of leveling agent, 0.5-3 parts of drying agent and 0.5-1 parts of adhesion promoter.

5. The solvent-based polymer nano thermal insulation varnish for vehicle exterior repair according to any one of claims 1 to 4, characterized in that The solvent-based polymer nano thermal insulation varnish for vehicle exterior repair uses a resin that is a solvent-based hydroxy acrylic resin, a mixed resin of a solvent-based hydroxy acrylic resin and a solvent-based saturated polyester resin, a mixed resin of a solvent-based hydroxy acrylic resin and a solvent-based alkyd resin, or a mixed resin of a solvent-based hydroxy acrylic resin, a solvent-based saturated polyester resin, and a solvent-based alkyd resin.

6. The solvent-based polymer nano thermal insulation varnish for vehicle exterior repair according to any one of claims 1 to 4, characterized in that The nanomaterials used in the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair 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 varnish for vehicle exterior repair according to any one of claims 1 to 4, characterized in that The leveling agent used in the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair is a combination of an organic silicon leveling agent, an acrylate leveling agent, and a fluorine-modified leveling agent, or any combination of the above three leveling agents. One or any combination of two of the above three leveling agents.

8. The solvent-based polymer nano thermal insulation varnish for vehicle exterior repair according to any one of claims 1 to 4, characterized in that The organic co-solvent used in the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair is a combination of different components of organic solvents such as methyl isobutyl ketone and dibasic acid ester; The drying agent used in the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair is an organic tin drying agent; the adhesion promoter used in the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair is a silane coupling agent; The solvent used in the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair is n-butyl acetate, xylene, propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate.

9. The use of a solvent-based polymer nano thermal insulation varnish for vehicle exterior repair according to any one of claims 1 to 11, characterized in that: The application of the solvent-based polymer nano thermal insulation varnish for vehicle appearance repair in the field of coating preparation.

10. A method for preparing a solvent-based polymer nano thermal insulation varnish for vehicle exterior repair according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Prepare raw materials and test each material according to the standards; S2. Weigh the high molecular weight hydroxy acrylic resin by weight and slowly add it into the container, and slowly add 50% of the drying agent while stirring, and disperse it at a speed of 300-500r / min in an explosion-proof disperser for 10-20min, and slowly add the nano material while stirring, and disperse it at a speed of 300-500r / min in an explosion-proof disperser for 10-20min; 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 xylene or n-butyl acetate in the material to lower it. When the viscosity is less than 78s, add the high molecular hydroxy 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 in an oven. The specific indicators are shown in the table below: S4, weighing polymer saturated polyester resin, polymer alkyd resin, n-butyl acetate, xylene, propylene glycol methyl ether acetate or ethylene glycol ethyl ether acetate, methyl isobutyl ketone, dibasic acid ester, other organic cosolvents, leveling agent, drying agent, adhesion promoter by weight, slowly adding the initial nano material mixture, 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 varnish for vehicle exterior repair; At the same time, this step should reserve 5% by weight of n-butyl acetate or xylene to adjust the viscosity of the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair; S5. Test various indicators of the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair prepared by S4. When the viscosity is greater than 52s, add appropriate amount of xylene or n-butyl acetate in the material to lower it. When the viscosity is less than 48s, add the polymer hydroxy acrylic resin reserved in 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℃, the coating 4 cups needs to be cooled with a refrigerator or ice cubes. When the indoor temperature is less than 24℃, the coating 4 cups needs to be heated in an oven. See the table below for specific indicators: S6. Filter the solvent-based polymer nano thermal insulation varnish for vehicle exterior repair that has passed the test in S5 using a 300-mesh filter cloth to obtain a qualified solvent-based polymer nano thermal insulation varnish for vehicle exterior repair.

Images