Self-drying high-insulation coating applied to automobile battery protection plate and preparation method of self-drying high-insulation coating

Abstract

The invention discloses a self-drying high-insulation coating applied to an automobile battery protection plate and a preparation method of the self-drying high-insulation coating, and relates to the field of coatings, the self-drying high-insulation coating comprises the following components: 30-50 parts of hydroxy acrylic resin, 6-10 parts of nitrocellulose, 1-3 parts of polyethylene wax, 2-6 parts of a dispersant, 2-6 parts of a pigment, 1-4 parts of matting powder, 0.1-0.6 part of a leveling agent and 8-10 parts of ethyl acetate. 8-10 parts of butyl acetate; and 1-3 parts of an adhesion promoter. The self-drying type high-insulation coating for the automobile battery protection plate, provided by the invention, has the advantages that the crosslinking density after curing is large, the performance indexes of a coating in the aspects of hardness, wear resistance, acid and alkali resistance, salt mist resistance, gasoline resistance and other organic solvents are very high, particularly, the insulating property of a paint film is very good, and the self-drying type high-insulation coating has very good adhesiveness when being coated on the surface of a high-temperature powder coating.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of coatings, and specifically relates to a self-drying high-insulation coating applied to a vehicle battery guard plate and a preparation method thereof. Background Art

[0002] Nowadays, with the increase in people's income, the improvement in quality of life, and the strengthening of awareness of environmental protection, new energy vehicles are developing rapidly, and the safety and performance requirements of batteries in automobiles are also steadily increasing. Batteries are key components of electric vehicles and one of the core components involving safety and sensitivity.

[0003] The protective layer on the outside of the vehicle battery power module needs to play a role in safety protection, and play a role in protection when the battery leaks, shorts, leaks, burns and other dangerous situations. The current automotive battery pack guard plates are generally made of high-strength aluminum base materials and then painted with high-temperature powder coatings. The painted guard plates are prone to scratching the powder paint coating during transportation and installation of other modules, which will cause the insulation performance of the coating to deteriorate or lose.

[0004] In order to make up for the defects in insulation performance and surface appearance, it is necessary to spray a layer of self-drying insulating paint for repair, which is convenient for operation and construction and ensures insulation performance. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a self-drying high-insulation coating for automobile battery guard plates and a preparation method thereof, so as to solve the technical problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a self-drying high-insulation coating for automobile battery guard plates, comprising the following components: 30-50 parts of hydroxy acrylic resin, 6-10 parts of nitrocellulose, 1-3 parts of polyethylene wax, 2-6 parts of dispersant, 2-6 parts of pigment, 1-4 parts of matting powder, 0.1-0.6 parts of leveling agent, 8-10 parts of ethyl acetate, 8-10 parts of butyl acetate and 1-3 parts of adhesion promoter.

[0007] Preferably, the hydroxyl acrylic resin is a hydroxyl acrylic resin with a hydroxyl value of 6-20 mgKOH / g, the nitrocellulose liquid is a mixed liquid of 70% by mass of butyl acetate and 30% by mass of 1 / 2 nitrocellulose powder, the dispersant is selected from Jiken AMORSO-560 dispersant, the adhesion promoter is Lubrizol's phosphate ester adhesive 2063, the pigment is carbon black, the matting powder is E-1011 of Japan Tosoh, and the leveling agent is BYK-333 leveling agent. In this preferred embodiment, the hydroxyl acrylic resin is a hydroxyl acrylic resin with a hydroxyl value of 6-20 mgKOH / g. The low hydroxyl resin in this range has the characteristics of fast drying and high hardness. The matting powder is selected from matting powders of different particle sizes according to customer requirements, and the fineness of the matting powder does not affect the insulation effect. The leveling agent is BYK-333 leveling agent, which is a polyether modified polydimethylsiloxane copolymer with extremely low surface tension reducing ability, good substrate wetting and good anti-shrinkage performance, increased surface smoothness and scratch resistance, low foam stability, and good compatibility and leveling in this formula system.

[0008] According to the above technical solution of a self-drying high-insulation coating applied to a vehicle battery guard plate, a preparation method of a self-drying high-insulation coating applied to a vehicle battery guard plate will also be provided, comprising the following steps:

[0009] Step 1: under clean conditions, 30-50 parts by weight of hydroxy acrylic resin and 6-10 parts by weight of nitrocellulose liquid are added into a mixing tank and stirred to obtain a mixture A;

[0010] Step 2: under stirring conditions, add 1-3 parts of polyethylene wax and 2-6 parts of dispersant into a mixing tank and stir and mix with the mixture A to obtain a mixture B;

[0011] Step 3: under stirring conditions, add 2-6 parts of pigment, 1-4 parts of matting powder and 0.1-0.6 parts of leveling agent into a mixing tank and stir and mix with the mixture B to obtain a mixture C;

[0012] Step 4, adding 8-10 parts of ethyl acetate and 8-10 parts of butyl acetate into a mixing tank and soaking the mixture C in the mixing tank to obtain a mixture D;

[0013] Step 5, dispersing the mixture D in the mixing tank at high speed to obtain a mixture E;

[0014] Step 6: The mixing tank is driven by the motor to rotate, and the mixed material E in the mixing tank is quantitatively discharged into the grinding bowl in the grinding device through multiple quantitative discharging devices at the bottom of the outer wall of the mixing tank. The grinder grinds the mixed material E in the rotating multiple grinding bowls at the same time, and obtains the mixed material F after the grinding is completed;

[0015] Step seven, add the mixed material F into the mixing tank, and simultaneously add 1-3 parts of the adhesion promoter into the mixing tank, and stir evenly to obtain the finished product.

[0016] Preferably, in the above preparation process, the stirring is carried out at a rate of 300-700 rpm, the stirring time in step 1 is 10-15 min, the stirring time in step 2 is 15-20 min, the stirring time in step 3 is 12-20 min, the soaking time in step 4 is 20-30 hours, the high-speed dispersion in step 5 refers to high-speed dispersion at a rate of 2000-2500 rpm, and the grinding in step 6 can reach a fineness of less than 10 μm. In this preferred embodiment, mixing according to the above conditions can reduce the soaking time, and the color powder can be completely wetted in a very short soaking time, and the grinding time can also be saved, and the color paste finished product in the required fineness range can be ground faster and better, with high production efficiency.

[0017] Preferably, the quantitative unloading device includes a first electrically controlled valve whose input end is connected to the mixing tank, a quantitative box connected to the output end of the first electrically controlled valve, a second electrically controlled valve whose input end is connected to the quantitative box, a discharge pipe provided at the output end of the second electrically controlled valve, a plunger component provided at the top of the quantitative box and whose execution end extends into the quantitative box, and a swing component provided on the outer wall of the quantitative box and used to drive the discharge pipe to swing. In this preferred embodiment, the quantitative unloading device facilitates the division of raw materials into multiple components for grinding, thereby avoiding the possibility of uneven grinding of a large amount of raw materials.

[0018] Preferably, the plunger component includes a positioning tube whose bottom end is connected to the top of the quantitative box, a plunger plate located in the quantitative box, a plunger rod whose bottom is connected to the top of the plunger plate and whose top extends into the positioning tube, an annular airflow tube whose bottom end is connected to the top of the positioning tube, and a positive pressure air source tube and a negative pressure air source tube whose bottom end is connected to the top of the annular airflow tube. In this preferred embodiment, the quantitative measurement and discharge of the raw material are achieved by the plunger component.

[0019] Preferably, the swing component includes two positioning plates symmetrically arranged on both sides of the quantitative box, a rotating frame arranged between the two positioning plates, and a micro motor arranged on the outer wall of the positioning plate and used to drive the rotating frame to rotate, and the bottom of the rotating frame is connected to the discharge end of the discharge pipe. In this preferred embodiment, the swing discharge of the raw material is achieved by the swing component, so that the raw material can evenly enter the grinding bowl.

[0020] Preferably, the grinding device comprises an annular plate, a toothed wall rotating disk arranged in an annular array on the top of the annular plate and rotatably connected to the annular plate at the bottom, a grinding bowl with a bottom threadedly connected to the top of the toothed wall rotating disk, a driving component arranged on the annular plate and used to drive the multiple toothed wall rotating disks to rotate, and multiple grinders arranged in an annular array on the annular plate and with grinding ends extending into the grinding bowl, and the annular plate is sleeved on the outside of the mixing tank. In this preferred embodiment, the raw materials are fully ground by the grinding device.

[0021] Preferably, the driving component includes a double-toothed wall ring rotatably connected to the top of the annular plate, a driving motor disposed at the bottom of the annular plate, a reducer disposed at the bottom of the annular plate and having its input end connected to the execution end of the driving motor, and a driving gear located at the upper part of the annular plate and connected to the output end of the reducer, the driving gear meshing with the outer tooth wall of the double-toothed wall ring, and the inner tooth wall of the double-toothed wall ring meshing with the toothed wall rotating disk. In this preferred embodiment, the driving component is used to realize the simultaneous rotation of multiple toothed wall rotating disks and the grinding bowl.

[0022] Preferably, the grinder comprises a vertical rod, a stopper assembly disposed on the annular plate and used to fix the bottom of the vertical rod, a U-shaped frame horizontally disposed on the top of the vertical rod, and two grinding blocks symmetrically disposed at the bottom of the U-shaped frame and located in the grinding bowl;

[0023] The limiting assembly includes a limiting seat arranged on the annular plate, two iron rings symmetrically arranged on both sides of the limiting seat, a guide column arranged on the outer wall of the U-shaped frame and extending to the outside of the iron ring through the iron ring, and a sliding limiting frame slidably connected to the upper surface of the annular plate and used to limit the guide column, and the bottom of the vertical rod is plugged into the limiting seat. In this preferred embodiment, the grinder is used to facilitate the grinding of the pigment in the grinding bowl, and the limiting assembly is used to facilitate the removal of the grinder, so as to facilitate the replacement of the grinding bowl.

[0024] In summary, the present invention mainly has the following beneficial effects:

[0025] In the formula of the self-drying high-insulation coating for automobile battery guard plates provided by the invention, hydroxy acrylic resin is used to provide adhesion and drying performance of the substrate; nitrocellulose is used to accelerate the release of solvent in the paint film, so as to achieve a self-drying effect; polyethylene wax provides scratch resistance and smoothness to the coating surface; adhesion promoter is used to provide adhesion between the paint film and the high-temperature powder coating, thereby increasing adhesion; the selected AMORSO-560 dispersant is a high-molecular-weight superdispersant containing multiple anchoring groups, a polymer with acidic groups; the carbon black particles are fully wetted, dispersed and ground by the 560 dispersant, and the chain segments of the polymer molecules contain single or tens of thousands of chain segments, which can successfully undergo an anchoring reaction on the non-polar surface of the pigment carbon black particles and are fixed to the surface of the pigment particles like iron anchors. The surface of solid fine particles is wetted to form a stable adsorption layer, which increases the charge on the surface of solid particles and improves the reaction force between particles that forms a three-dimensional barrier to prevent adsorption between particles. This will prevent flocculation caused by collision and contact caused by Brownian motion, and make the solid particles evenly and stably dispersed in the medium, thereby achieving a higher resistance effect. The leveling agent provides leveling properties for the paint film. Ethyl acetate and butyl acetate are solvents, which give the paint better fluidity and solvent release properties.

[0026] The self-drying high-insulation coating for the automobile battery guard plate provided by the present invention can be used for beautifying and repairing workpieces after being coated with high-temperature powder coating.

[0027] The self-drying high-insulation coating for the automobile battery guard plate provided by the present invention has a large cross-linking density after curing, and the coating has high performance indicators in terms of hardness, wear resistance, acid and alkali resistance, salt spray resistance, gasoline and other organic solvents. In particular, the insulation of the paint film is particularly good, and it has good adhesion when applied on the surface of high-temperature powder coatings. When the resistance is tested by Nanjing Changsheng's resistance meter at a voltage of 5000V, the resistance can reach more than 600M. The self-drying high-insulation coating for the automobile battery guard plate provided by the present invention has excellent performance, the coating can be completely cured and cross-linked, there is no solvent residue and no back-sticking, and it has good dispersibility during spraying, moderate leveling, moderate thixotropy, uniform coating, no obvious orange peel, no pinhole bubbles, no impurity points, and good smoothness.

[0028] In the present invention, the quantitative unloading device is used to facilitate the equal division of raw materials into multiple components for grinding, thereby avoiding the possibility of uneven grinding of a large amount of raw materials. The quantitative unloading device uses a plunger component to realize quantitative measurement and unloading of the raw materials, and uses a swing component to realize swing unloading of the raw materials, so that the raw materials can evenly enter the grinding bowl;

[0029] The raw materials are fully ground by the grinding device, and the driving components in the grinding device realize the simultaneous rotation of multiple tooth wall turntables and the grinding bowl. The grinder is used to facilitate the grinding of the pigment in the grinding bowl, and the limit assembly is used to facilitate the removal of the grinder to facilitate the replacement of the grinding bowl. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an axonometric diagram of the mixing tank and the grinding device structure of the present invention;

[0031] Figure 2 It is an exploded view of the mixing tank and the grinding device structure of the present invention;

[0032] Figure 3 It is an exploded view of the overall structure of the mixing tank of the present invention;

[0033] Figure 4 An exploded view of the overall structure of the grinding device of the present invention;

[0034] Figure 5 An exploded view of the grinder structure of the present invention;

[0035] Figure 6 It is a top view of the overall structure of the present invention;

[0036] Figure 7 It is a cross-sectional view of the overall structure of the present invention;

[0037] Figure 8 It is an enlarged view of the structure at location A of the present invention.

[0038] Description of the drawings: 10, mixing tank; 20, quantitative unloading device; 21, first electric control valve; 22, quantitative box; 23, second electric control valve; 24, unloading pipe; 25, plunger component; 251, positioning tube; 252, plunger plate; 253, plunger rod; 254, annular air flow tube; 255, positive pressure air source tube; 256, negative pressure air source tube; 26, swing component; 261, positioning plate; 262, rotating frame; 263, micro motor ; 30. Grinding device; 31. Ring plate; 32. Toothed wall turntable; 33. Grinding bowl; 34. Driving component; 341. Double toothed wall ring; 342. Driving motor; 343. Reducer; 344. Driving gear; 35. Grinder; 351. Vertical rod; 352. Limiting assembly; 3521. Limiting seat; 3522. Iron ring; 3523. Guide column; 3524. Sliding limiting frame; 353. U-shaped frame; 354. Grinding block. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] The following describes an embodiment of the present invention based on its overall structure.

[0041] Example

[0042] A self-drying high-insulation coating for automobile battery guard plates comprises the following components: 30-50 parts of hydroxy acrylic resin, 6-10 parts of nitrocellulose, 1-3 parts of polyethylene wax, 2-6 parts of dispersant, 2-6 parts of pigment, 1-4 parts of matting powder, 0.1-0.6 parts of leveling agent, 8-10 parts of ethyl acetate, 8-10 parts of butyl acetate and 1-3 parts of adhesion promoter, wherein the hydroxy acrylic resin is a hydroxy acrylic resin with a hydroxyl value of 6-20 mgKOH / g, the nitrocellulose liquid is a mixed liquid of 70% by mass of butyl acetate and 30% by mass of 1 / 2 nitrocellulose powder, the dispersant is selected from Jiyan AMORSO-560 dispersant, the adhesion promoter is Lubrizol's phosphate ester adhesive 2063, the pigment is carbon black, the matting powder is E-1011 of Tosoh of Japan, and the leveling agent is BYK-333 leveling agent.

[0043] It should be noted that, in the present embodiment, hydroxy acrylic resin is used to provide the adhesion and drying performance of the substrate. Nitrocellulose is used to accelerate the release of solvent in the paint film, and the self-drying effect can be achieved. Polyethylene wax provides scratch resistance and smoothness on the coating surface. Adhesion promoter is used to provide adhesion between the paint film and the high-temperature powder coating, and plays a role in increasing adhesion. The selected AMORSO-560 dispersant is a polymer-type super dispersant containing multiple anchoring groups, a polymer with an acidic group. The carbon black particles are fully wetted, dispersed and ground by the 560 dispersant, and the chain segments of the polymer molecules contain single or tens of thousands of chain segments, which can successfully generate anchoring reactions on the non-polar surfaces of the pigment carbon black particles and are fixed on the surface of the pigment particles like iron anchors. A stable adsorption layer is formed on the surface of the solid fine particles, which increases the charge on the surface of the solid particles and improves the reaction force between the particles that forms a three-dimensional barrier to prevent the adsorption between the particles, so that the collision contact flocculation caused by the Brownian motion will not occur, so that the solid particles are evenly and stably dispersed in the medium, thereby achieving a higher resistance effect. The leveling agent provides the leveling property of the paint film. Ethyl acetate and butyl acetate are solvents, which give the paint better fluidity and solvent release properties.

[0044] Furthermore, the self-drying high-insulation coating for the automobile battery guard plate is mixed with the curing agent and the diluent in a weight ratio of 10:1:8-10, sprayed on a high-temperature powder substrate, and a high-insulation black paint film can be formed after self-drying at room temperature for 48 hours.

[0045] The curing agent is obtained by mixing curing agent N3390 and butyl acetate in a mass ratio of 60:40.

[0046] The diluent consists of ethyl acetate, butyl acetate and diacetone alcohol in a mass ratio of 3:1:1.

[0047] The compound curing agent and diluent designed by the present invention are matched with the coating of the present invention, so that the paint film can be uniformly and quickly cured and dried.

[0048] The paint film prepared by the raw materials and method with the above ratio has good leveling properties. The combined use of ethyl acetate and butyl acetate ensures the solubility of each raw material while improving the drying property of the construction. The paint film coating can be completely cured and cross-linked, with no solvent residue and no re-stickiness. Moreover, it has good dispersibility during spraying, moderate leveling, moderate thixotropy, uniform coating, no obvious orange peel, no pinhole bubbles, no impurity points, and good smoothness of the paint film.

[0049] Example 1

[0050] A self-drying high-insulation coating for automobile battery guard plates comprises the following raw materials in parts by weight: see Table 1 below.

[0051] Table 1 Coating ingredients of Example 1, Comparative Example 1 and Comparative Example 2

[0052]

[0053]

[0054] Comparative Example 1-Comparative Example 2

[0055] A self-drying high-insulation coating for an automobile battery guard plate comprises the following raw materials in parts by weight: see Table 1.

[0056] In Table 1, the dispersants used in Example 1 and Comparative Examples 1-2 are different, and other materials remain unchanged. By comparison, the effects of different dispersants on the performance of the paint film can be obtained. Only by using the AMORSO-560 dispersant and carbon black in combination can the present application achieve an insulation effect of ≥500M. The polymer containing multiple anchoring groups in AMORSO-560 has excellent wetting and dispersing ability for FW-200 toner. Multiple anchoring groups can wrap the moving molecules of carbon black, reducing the probability of contact during the movement of free electrons, so that it achieves an excellent insulation effect. The insulation effect achieved by the present invention is far beyond the reach of other dispersants and other formulas.

[0057] Comparative Example 3-Comparative Example 4

[0058] A self-drying high-insulation coating for automobile battery shields comprises the following raw materials in parts by weight: see Table 2 below.

[0059] Table 2 Comparative Example 3-Comparative Example 4 Coating Composition

[0060]

[0061] The 30% nitrocellulose solution in Table 1 and Table 2 is a mixed solution of 70% by mass of butyl acetate and 30% by mass of cellulose acetate butyrate powder, which is dispersed at high speed to form a particle-free solution.

[0062] The preparation method of the self-drying high-insulation coating for automobile batteries described in Example 1, Comparative Example 1 and Comparative Example 2 is as follows:

[0063] 1) Under clean conditions, stirring the formulated amount of hydroxy acrylic resin and cellulose acetate butyrate solution at 400 rpm for 10 min to obtain a mixture A;

[0064] 2) adding the formulated amount of polyethylene wax powder and dispersant to the mixture A under stirring at 400 rpm, stirring for 15 min, to obtain a mixture B;

[0065] 3) Slowly add the formula amount of insulating carbon black, E-1011 matte powder and leveling agent into mixture B under stirring at 400 rpm and stir for 15 minutes;

[0066] 4) Continue to add ethyl acetate and butyl acetate and soak for 24 hours;

[0067] 5) After soaking, disperse the mixture in a disperser at 2000 rpm for 1 hour;

[0068] 6) The dispersed black slurry needs to be ground in a grinder for 3 hours until the fineness reaches less than 10μm.

[0069] The preparation method of the self-drying high-insulation coating for automobile batteries described in Comparative Example 3 is as follows:

[0070] 1) Under clean conditions, hydroxy acrylic resin, cellulose acetate butyrate solution, polyethylene wax powder, insulating carbon black, E-1011 matte powder and leveling agent were mixed, and stirred at 400 rpm for 10 min to obtain a mixture A;

[0071] 2) Adding the formulated amount of dispersant to the mixture A under stirring at 400 rpm and stirring for 15 min to obtain a mixture B;

[0072] 3) Continue to add ethyl acetate and butyl acetate and soak for 24 hours; if the color is not completely wetted, continue soaking for 20 hours to achieve the color completely wetted;

[0073] 4) After soaking, disperse the mixture in a disperser at 2000 rpm for 1 hour;

[0074] 5) The dispersed black slurry needs to be ground in a grinder for 3 hours. If the particle size does not meet the requirements, continue grinding for 5 hours to obtain a fineness of less than 10 μm.

[0075] 6) Finally, add adhesion promoter and stir evenly.

[0076] The preparation methods of Comparative Examples 3 and 4 are the same as that of Example 1.

[0077] The application of the coatings in Example 1 and Comparative Examples 1-4 is specifically as follows:

[0078] The self-drying high-insulation coating for automobile batteries obtained in Example 1 and Comparative Examples 1-4, a curing agent and a diluent were prepared in a weight ratio of 10:1:10, wherein the curing agent was prepared by mixing 50 parts of curing agent N3390 with 50 parts of butyl acetate; and the diluent was composed of 60% ethyl acetate, 20% butyl acetate and 20% diacetone alcohol by weight. The prepared coating was sprayed on the workpiece coated with the automobile battery powder coating, and the performance of the paint film was tested after leveling and drying at room temperature for 48 hours.

[0079] The test results of the paint films of various embodiments and comparative examples are shown in Table 3.

[0080] Table 3 Paint film test results

[0081]

[0082]

[0083] The test standards for the self-drying high insulation coating for automotive batteries are as follows:

[0084] 1. Appearance: Evaluate the film for surface defects such as blistering, orange peel, craters, ripples, and prickly heat.

[0085] 2. Storage period: Evaluate whether the paint has abnormal conditions such as thickening, stratification, gumming, color change, and coarsening during the shelf life;

[0086] 3. Resistance test needs to be completed with the help of instruments. Customers require the film resistance to reach 500M or more.

[0087] 4. The resistance of the solution in Example 1 meets the customer's requirements

[0088] 5. In Example 1, Comparative Example 1 and Comparative Example 2, when the carbon black is the same, the combination with different dispersants can produce greatly different insulation effects.

[0089] 6. For the solution in Example 3, the resistance value did not meet the requirement because the paint film was not dry enough and was not completely dry.

[0090] 7. In Comparative Example 4, although the resistance value meets the requirement, the adhesion to the workpiece is poor because no phosphate adhesion promoter is added.

[0091] For the test standards of other properties of the above paint films, please refer to Volkswagen's VW TL226 standard.

[0092] Volkswagen's VW TL226 is the most stringent standard in the automotive exterior parts industry. Now most automotive interior parts manufacturers use the VW TL226 standard to test the performance of paint. It can be seen from Table 3 that the self-drying high-insulation coating for automotive batteries disclosed in the present invention can fully meet Volkswagen's VW TL226 standard, and the paint film coating obtained in each embodiment is uniform, has no obvious orange peel, no pinhole bubbles, and has good smoothness. The perfect combination of the dispersant and carbon black can achieve a perfect insulation effect of carbon black.

[0093] According to the above embodiments, and the attached Figure 1 , 2 , 3, 7, and 8, a method for preparing a self-drying high-insulation coating for a vehicle battery guard plate is also provided, comprising the following steps:

[0094] Step 1: under clean conditions, 30-50 parts by weight of hydroxy acrylic resin and 6-10 parts by weight of nitrocellulose liquid are added into a mixing tank 10 and stirred to obtain a mixture A;

[0095] Step 2: under stirring conditions, 1-3 parts of polyethylene wax and 2-6 parts of dispersant are added into a mixing tank 10 and stirred and mixed with the mixture A to obtain a mixture B;

[0096] Step 3: under stirring conditions, add 2-6 parts of pigment, 1-4 parts of matting powder and 0.1-0.6 parts of leveling agent into the mixing tank 10 and stir and mix with the mixture B to obtain a mixture C;

[0097] Step 4: adding 8-10 parts of ethyl acetate and 8-10 parts of butyl acetate into the mixing tank 10 and soaking the mixture C in the mixing tank 10 to obtain a mixture D;

[0098] Step 5, dispersing the mixture D in the mixing tank 10 at high speed to obtain a mixture E;

[0099] Step 6: The mixing tank 10 is driven by the motor to rotate, and the mixed material E in the mixing tank 10 is quantitatively discharged into the grinding bowl 33 in the grinding device 30 through the multiple quantitative discharging devices 20 at the bottom of the outer wall of the mixing tank 10. The grinder 35 grinds the mixed material E in the rotating multiple grinding bowls 33 at the same time, and obtains the mixed material F after the grinding is completed;

[0100] Step 7, add the mixed material F into the mixing tank 10, and add 1-3 parts of the adhesion promoter into the mixing tank 10 at the same time, and stir evenly to obtain the finished product;

[0101] In the above preparation process, the stirring is carried out at a rate of 300-700 rpm, the stirring time in step one is 10-15 min, the stirring time in step two is 15-20 min, the stirring time in step three is 12-20 min, the soaking time in step four is 20-30 hours, the high-speed dispersion in step five refers to high-speed dispersion at a rate of 2000-2500 rpm, and the grinding in step six has a fineness of less than 10 μm. The quantitative unloading device 20 includes a first electrically controlled valve 21 whose input end is connected to the mixing tank 10, a quantitative box 22 connected to the output end of the first electrically controlled valve 21, a second electrically controlled valve 23 whose input end is connected to the quantitative box 22, a discharge pipe 24 arranged at the output end of the second electrically controlled valve 23, and a plunger component 25 arranged at the top of the quantitative box 22 and whose execution end extends to the quantitative box 22. , and a swinging component 26 arranged on the outer wall of the quantitative box 22 and used to drive the discharge pipe 24 to swing, the plunger component 25 includes a positioning tube 251 whose bottom end is connected to the top of the quantitative box 22, a plunger plate 252 located in the quantitative box 22, a plunger rod 253 whose bottom is connected to the top of the plunger plate 252 and extends into the positioning tube 251, an annular airflow tube 254 whose bottom is connected to the top of the positioning tube 251, and a positive pressure air source tube 255 and a negative pressure air source tube 256 whose bottom end is connected to the top of the annular airflow tube 254, the swinging component 26 includes two positioning plates 261 symmetrically arranged on both sides of the quantitative box 22, a rotating frame 262 arranged between the two positioning plates 261, and a micro motor 263 arranged on the outer wall of the positioning plate 261 and used to drive the rotating frame 262 to rotate, and the bottom of the rotating frame 262 is connected to the discharge end of the discharge pipe 24.

[0102] It should be noted that, in this embodiment, the top cover of the mixing tank 10 is opened, and the raw materials to be added can be added to the mixing tank 10. The motor on the top cover of the mixing tank 10 is opened, and the motor can drive the shaft at its execution end and extending from the top cover of the mixing tank 10 to the inside of the mixing tank 10 to rotate, and the shaft drives the impeller at the end to rotate, so as to achieve the effect of stirring and dispersing;

[0103] The top cover of the mixing tank 10 can be connected to the air pressure pipe, and the air pressure pipe can be connected to the air storage tank, so that the pressurized gas can enter the mixing tank 10 through the air pressure pipe, so as to fully discharge the material in the mixing tank 10. When unloading and grinding are required, the first electrically controlled valve 21 is opened, and the negative pressure system connected to the negative pressure air source pipe 256 is opened at the same time. The negative pressure drives the plunger rod 253 and the plunger plate 252 to rise, so that the material enters the quantitative box 22. When the material in the quantitative box 22 reaches the set amount, the first electrically controlled valve 21 is closed, the second electrically controlled valve 23 is opened, and the negative pressure system connected to the negative pressure air source pipe 256 is closed, and the positive pressure system connected to the positive pressure air source pipe 255 is opened, and the material is unloaded into the grinding bowl 33 through the second electrically controlled valve 23 and the discharge pipe 24;

[0104] Furthermore, when the swing component 26 is working, the execution end of the micro motor 263 drives the rotating frame 262 to rotate, and the rotating frame 262 drives the discharge pipe 24 to swing, so that the material enters the grinding bowl 33 in a reciprocating swinging state, thereby ensuring the uniformity of the material when entering the grinding bowl 33;

[0105] Furthermore, the motor on the bottom bracket of the mixing tank 10 can drive the mixing tank 10 to rotate on the bottom bracket, so that the quantitative unloading device 20 can add materials to different grinding bowls 33.

[0106] Please refer to the attached Figure 1 , 2 As shown in , 4, 5, and 6, in another preferred embodiment of the present invention, the grinding device 30 includes an annular plate 31, a toothed wall turntable 32 arranged in an annular array on the top of the annular plate 31 and rotatably connected to the annular plate 31 at the bottom, a grinding bowl 33 with a bottom threadedly connected to the top of the toothed wall turntable 32, a driving component 34 arranged on the annular plate 31 and used to drive the multiple toothed wall turntables 32 to rotate, and a plurality of grinders 35 arranged in an annular array on the annular plate 31 and with grinding ends extending into the grinding bowl 33, the annular plate 31 is sleeved on the outside of the mixing tank 10, the driving component 34 includes a double toothed wall ring 341 rotatably connected to the top of the annular plate 31, a driving motor 342 arranged at the bottom of the annular plate 31, a reducer 343 arranged at the bottom of the annular plate 31 and having an input end connected to an execution end of the driving motor 342, and a driving The gear 344 is meshed with the outer tooth wall of the double-toothed wall ring 341, and the inner tooth wall of the double-toothed wall ring 341 is meshed with the tooth wall rotating disk 32. The grinder 35 includes a vertical rod 351, a limit assembly 352 provided on the annular plate 31 and used to fix the bottom of the vertical rod 351, a U-shaped frame 353 horizontally provided on the top of the vertical rod 351, and two grinding wheels symmetrically provided at the bottom of the U-shaped frame 353 and located in the grinding bowl 33. Block 354; the limiting assembly 352 includes a limiting seat 3521 arranged on the annular plate 31, two iron rings 3522 symmetrically arranged on both sides of the limiting seat 3521, a guide column 3523 arranged on the outer wall of the U-shaped frame 353 and extending to the outside of the iron ring 3522 through the iron ring 3522, and a sliding limiting frame 3524 slidably connected to the upper surface of the annular plate 31 and used to limit the guide column 3523, and the limiting seat 3521 is inserted into the bottom of the vertical rod 351.

[0107] It should be noted that, in this embodiment, when the grinding device 30 is working, after the paint enters the grinding bowl 33, the execution end of the driving motor 342 drives the reducer 343 to work, the output end of the reducer 343 drives the driving gear 344 to rotate, the driving gear 344 drives the double-toothed wall ring 341 to rotate, the double-toothed wall ring 341 simultaneously drives the multiple toothed wall rotating disks 32 to rotate, the toothed wall rotating disk 32 drives the grinding bowl 33 to rotate, when the grinding bowl 33 rotates, the material is ground between the grinding bowl 33 and the grinding block 354;

[0108] Furthermore, the two grinding blocks 354 are symmetrically arranged so as not to affect the swinging of the material into the grinding bowl 33. After the grinding is completed, the sliding limit frame 3524 is moved so that the sliding limit frame 3524 cancels the limit on the guide column 3523, and the vertical rod 351 is lifted until the guide column 3523 moves up to the top of the inner ring of the iron ring 3522. At this time, the vertical rod 351 can be rotated with the guide column 3523 as the axis to make the grinding block 354 leave the grinding bowl 33, rotate the grinding bowl 33, and unscrew the grinding bowl 33 from the tooth wall turntable 32 to facilitate the replacement of the new grinding bowl 33 for material grinding processing.

[0109] The working principle of the present invention is:

[0110] The electrical components in the present invention are all triggered to operate by the PLC controller;

[0111] Open the top cover of the mixing tank 10 to add the raw materials to be added to the mixing tank 10, open the motor on the top cover of the mixing tank 10, and the motor can drive the shaft at its execution end and extending from the top cover of the mixing tank 10 to the inside of the mixing tank 10 to rotate, and the shaft drives the impeller at the end to rotate, so as to achieve the effect of stirring and dispersing;

[0112] The top cover of the mixing tank 10 can be connected to the air pressure pipe, and the air pressure pipe can be connected to the air storage tank, so that the pressurized gas can enter the mixing tank 10 through the air pressure pipe, so as to fully discharge the material in the mixing tank 10. When unloading and grinding are required, the first electrically controlled valve 21 is opened, and the negative pressure system connected to the negative pressure air source pipe 256 is opened at the same time. The negative pressure drives the plunger rod 253 and the plunger plate 252 to rise, so that the material enters the quantitative box 22. When the material in the quantitative box 22 reaches the set amount, the first electrically controlled valve 21 is closed, the second electrically controlled valve 23 is opened, and the negative pressure system connected to the negative pressure air source pipe 256 is closed, and the positive pressure system connected to the positive pressure air source pipe 255 is opened, and the material is unloaded into the grinding bowl 33 through the second electrically controlled valve 23 and the discharge pipe 24;

[0113] When the swing component 26 is working, the execution end of the micro motor 263 drives the rotating frame 262 to rotate, and the rotating frame 262 drives the discharge pipe 24 to swing, so that the material enters the grinding bowl 33 in a reciprocating swing state, ensuring the uniformity of the material when entering the grinding bowl 33;

[0114] The motor on the bottom bracket of the mixing tank 10 can drive the mixing tank 10 to rotate on the bottom bracket, so that the quantitative unloading device 20 can add materials to different grinding bowls 33;

[0115] When the grinding device 30 is working, after the paint enters the grinding bowl 33, the execution end of the driving motor 342 drives the reducer 343 to work, and the output end of the reducer 343 drives the driving gear 344 to rotate, and the driving gear 344 drives the double-toothed wall ring 341 to rotate, and the double-toothed wall ring 341 simultaneously drives multiple toothed wall rotating disks 32 to rotate, and the toothed wall rotating disk 32 drives the grinding bowl 33 to rotate. When the grinding bowl 33 rotates, the material is ground between the grinding bowl 33 and the grinding block 354;

[0116] The two grinding blocks 354 are symmetrically arranged so as not to affect the swinging of the material into the grinding bowl 33. After the grinding is completed, the sliding limit frame 3524 is moved so that the sliding limit frame 3524 cancels the limit on the guide column 3523, and the vertical rod 351 is lifted until the guide column 3523 moves up to the top of the inner ring of the iron ring 3522. At this time, the vertical rod 351 can be rotated with the guide column 3523 as the axis to make the grinding block 354 leave the grinding bowl 33, rotate the grinding bowl 33, and unscrew the grinding bowl 33 from the tooth wall turntable 32 to facilitate the replacement of the new grinding bowl 33 for material grinding processing.

[0117] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A self-drying high insulation coating for automobile battery guard plate, characterized in that , including the following components, 30-50 parts of hydroxy acrylic resin, 6-10 parts of nitrocellulose, 1-3 parts of polyethylene wax, 2-6 parts of dispersant, 2-6 parts of pigment, 1-4 parts of matting powder, 0.1-0.6 parts of leveling agent, 8-10 parts of ethyl acetate, 8-10 parts of butyl acetate and 1-3 parts of adhesion promoter.

2. The self-drying high-insulation coating for automobile battery shield according to claim 1, characterized in that: The hydroxyl acrylic resin is a hydroxyl acrylic resin with a hydroxyl value of 6-20 mgKOH / g, the nitrocellulose liquid is a mixed liquid of 70% by mass of butyl acetate and 30% by mass of 1 / 2 nitrocellulose powder, the dispersant is selected from Jiyan AMORSO-560 dispersant, the adhesion promoter is Lubrizol's phosphate ester adhesive 2063, the pigment is carbon black, the matting powder is E-1011 of Japan Tosoh, and the leveling agent is BYK-333 leveling agent.

3. A method for preparing a self-drying high-insulation coating for automobile battery shield according to any one of claims 1-2, characterized in that: The following steps are involved: Step 1: under clean conditions, 30-50 parts by weight of hydroxy acrylic resin and 6-10 parts by weight of nitrocellulose liquid are added into a mixing tank (10) and stirred to obtain a mixture A; Step 2: under stirring conditions, 1-3 parts of polyethylene wax and 2-6 parts of dispersant are added into a mixing tank (10) and stirred and mixed with the mixture A to obtain a mixture B; Step 3: under stirring conditions, add 2-6 parts of pigment, 1-4 parts of matting powder and 0.1-0.6 parts of leveling agent into a mixing tank (10) and stir and mix with the mixture B to obtain a mixture C; Step 4: Add 8-10 parts of ethyl acetate and 8-10 parts of butyl acetate into a mixing tank (10) and soak the mixture C in the mixing tank (10) to obtain a mixture D; Step 5, dispersing the mixture D in the mixing tank (10) at high speed to obtain a mixture E; Step 6: The mixing tank (10) is driven by the motor to rotate, and the mixed material E in the mixing tank (10) is quantitatively discharged into the grinding bowl (33) in the grinding device (30) through multiple quantitative discharge devices (20) at the bottom of the outer wall of the mixing tank (10). The grinder (35) grinds the mixed material E in the rotating multiple grinding bowls (33) at the same time, and a mixed material F is obtained after the grinding is completed; Step seven, add the mixed material F into the mixing tank (10), and simultaneously add 1-3 parts of an adhesion promoter into the mixing tank (10), and stir evenly to obtain a finished product.

4. The method for preparing a self-drying high-insulation coating for automobile battery guard plate according to claim 3, characterized in that: In the above preparation process, the stirring is carried out at a rate of 300-700 rpm, the stirring time in step 1 is 10-15 min, the stirring time in step 2 is 15-20 min, the stirring time in step 3 is 12-20 min, the soaking time in step 4 is 20-30 hours, the high-speed dispersion in step 5 refers to high-speed dispersion at a rate of 2000-2500 rpm, and the grinding in step 6 can reach a fineness of less than 10 μm.

5. The method for preparing a self-drying high-insulation coating for automobile battery shield according to claim 3, characterized in that: The quantitative unloading device (20) comprises a first electrically controlled valve (21) whose input end is connected to the mixing tank (10), a quantitative box (22) connected to the output end of the first electrically controlled valve (21), a second electrically controlled valve (23) whose input end is connected to the quantitative box (22), a unloading pipe (24) arranged at the output end of the second electrically controlled valve (23), a plunger component (25) arranged at the top of the quantitative box (22) and whose execution end extends into the quantitative box (22), and a swing component (26) arranged on the outer wall of the quantitative box (22) and used to drive the unloading pipe (24) to swing.

6. The method for preparing a self-drying high-insulation coating for automobile battery shield according to claim 5, characterized in that: The plunger component (25) includes a positioning tube (251) whose bottom end is connected to the top of the quantitative box (22), a plunger plate (252) located in the quantitative box (22), a plunger rod (253) whose bottom is connected to the top of the plunger plate (252) and whose top extends into the positioning tube (251), an annular airflow tube (254) whose bottom end is connected to the top of the positioning tube (251), and a positive pressure air source tube (255) and a negative pressure air source tube (256) whose bottom end is connected to the top of the annular airflow tube (254).

7. The method for preparing a self-drying high-insulation coating for automobile battery shield according to claim 5, characterized in that: The swing component (26) comprises two positioning plates (261) symmetrically arranged on both sides of the quantitative box (22), a rotating frame (262) arranged between the two positioning plates (261), and a micro motor (263) arranged on the outer wall of the positioning plate (261) and used for driving the rotating frame (262) to rotate, and the bottom of the rotating frame (262) is connected to the discharge end of the discharge pipe (24).

8. The method for preparing a self-drying high-insulation coating for automobile battery shield according to claim 3, characterized in that: The grinding device (30) comprises an annular plate (31), a toothed wall rotating disk (32) arranged in an annular array on the top of the annular plate (31) and rotatably connected to the annular plate (31) at the bottom, a grinding bowl (33) with a bottom threadedly connected to the top of the toothed wall rotating disk (32), a driving component (34) arranged on the annular plate (31) and used to drive the plurality of toothed wall rotating disks (32) to rotate, and a plurality of grinders (35) arranged in an annular array on the annular plate (31) and with grinding ends extending into the grinding bowl (33), wherein the annular plate (31) is sleeved on the outside of the mixing tank (10).

9. The method for preparing a self-drying high-insulation coating for automobile battery shield according to claim 8, characterized in that: The driving component (34) includes a double-toothed wall ring (341) rotatably connected to the top of the annular plate (31), a driving motor (342) arranged at the bottom of the annular plate (31), a reducer (343) arranged at the bottom of the annular plate (31) and having an input end connected to an execution end of the driving motor (342), and a driving gear (344) located at the upper part of the annular plate (31) and connected to an output end of the reducer (343), wherein the driving gear (344) is meshed with the outer tooth wall of the double-toothed wall ring (341), and the inner tooth wall of the double-toothed wall ring (341) is meshed with the tooth wall rotating disk (32).

10. The method for preparing a self-drying high-insulation coating for automobile battery shield according to claim 8, characterized in that: The grinder (35) comprises a vertical rod (351), a stopper assembly (352) disposed on the annular plate (31) and used to fix the bottom of the vertical rod (351), a U-shaped frame (353) horizontally disposed on the top of the vertical rod (351), and two grinding blocks (354) symmetrically disposed at the bottom of the U-shaped frame (353) and located in the grinding bowl (33); The limiting assembly (352) comprises a limiting seat (3521) arranged on the annular plate (31), two iron rings (3522) symmetrically arranged on both sides of the limiting seat (3521), a guide column (3523) arranged on the outer wall of the U-shaped frame (353) and extending to the outside of the iron ring (3522) through the iron ring (3522), and a sliding limiting frame (3524) slidably connected to the upper surface of the annular plate (31) and used for limiting the guide column (3523), and the limiting seat (3521) is plugged into the bottom of the vertical rod (351).

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