High-performance coating and preparation method thereof

Abstract

The invention discloses a high-performance coating and a preparation method thereof, the high-performance coating comprises the following components by weight: 60-70% of polyurethane resin, 2-5% of ceramic micro powder, 0.5-1% of a bactericide, 0.2% of an antifoaming agent, 10-15% of xylene, 2% of a leveling agent, 3% of titanium dioxide, 0.2% of an ultraviolet light absorber and a pigment, and also comprises 3-8% of barite powder and 5-10% of an anti-cracking agent; the high-performance coating has the advantages of strong adhesive ability, corrosion resistance, cracking resistance and good overall performance during use, the preparation method can effectively eliminate coating bubbles during coating production, coating loss can be avoided in the defoaming process, secondary generation of bubbles is avoided, the use effect is excellent, and smooth production of the coating is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and in particular to a high-performance coating and a preparation method thereof. Background Art

[0002] Paint is applied to the surface of the object to be protected or decorated, and forms a continuous film that is firmly attached to the coated object. It is usually a viscous liquid prepared with organic solvents or water, mainly based on resin, oil or emulsion, with pigments, fillers and corresponding additives added as appropriate.

[0003] The invention patent with publication number CN1162611A discloses an anti-corrosion coating and a preparation method thereof. The anti-corrosion coating contains a solvent, a film-forming resin, an additive, a pigment and a filler, wherein the main component of the film-forming resin is a modified polystyrene resin obtained by hot mixing of a polystyrene resin and styrene-butadiene rubber; the technical problems of weak adhesion and poor performance of the coating are solved.

[0004] Although the above-mentioned coating can improve adhesion, its anti-corrosion and anti-cracking performance is low and its overall performance is poor. In addition, the bubbles carried in the coating cannot be completely eliminated during the production and preparation process, which is not conducive to the smooth preparation and production of the coating. It also affects the painting quality during use, and the use effect is not ideal. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned problems and provide a high-performance coating and its preparation method which has strong adhesion ability, is anti-corrosive and anti-cracking, and has good overall performance. The preparation method can effectively eliminate coating bubbles when producing coatings, and can prevent coating loss during the defoaming process, while avoiding the secondary generation of bubbles. The use effect is excellent, ensuring the smooth production of coatings.

[0006] To achieve the above purpose, the technical solution of the present invention is: a high-performance coating, comprising the following weight components, wherein the polyurethane resin is 60-70%, the ceramic micropowder is 2-5%, the bactericide is 0.5-1%, the defoamer is 0.2%, the xylene is 10-15%, the leveling agent is 2%, the titanium dioxide is 3%, the ultraviolet light absorber is 0.2% and the pigment.

[0007] Preferably, the polyurethane resin comprises 65%, ceramic powder 3%, bactericide 0.5%, defoamer 0.2%, xylene 12%, leveling agent 2%, titanium dioxide 3%, and ultraviolet light absorber 0.2%.

[0008] Preferably, it also includes 3-8% barite powder and 5-10% anti-cracking agent.

[0009] A method for preparing a high-performance coating comprises the following steps: S1: raw material selection, including selecting resin, pigment and additive; S2: mixing and grinding the resin and pigment in a tank for 30-60 minutes until the resin is completely dispersed; S3: color adjustment and light adjustment, adding pigment to the mixed coating again; S4: continuing to add diluent and additive into the tank; S5: stirring the mixed coating, diluent and additive at a speed of 600-800r for 30 minutes; S6: allowing the pigment in S5 to stand and defoam; S7: brushing inspection, taking out a small amount of coating and applying it on the wall, observing the gloss, color and hardness of the coating.

[0010] The diluent in step S4 is water or an alcohol solvent.

[0011] Preferably, in step S6, defoaming is performed in the tank body by a defoaming device, the defoaming device comprises a defoaming plate and a top cover, a connecting rod extending upward is provided at the center of the top cover, a plurality of air holes are provided in an array around the connecting rod, a plurality of overflow holes are provided around the surface of the defoaming plate, a center hole is provided at the axis of the defoaming plate, a fixed plate is provided in the center hole, and a plurality of reflux holes are provided around the fixed plate.

[0012] Preferably, the surface of the defoaming disk is provided with a downward arc slope, which is inclined toward the center hole. A first baffle ring and multiple second baffle rings are provided on the arc slope. After the paint enters the defoaming disk from the overflow hole, it passes over the first baffle ring and the second baffle ring and flows toward the center hole.

[0013] Preferably, the height of the first baffle ring is higher than that of the second baffle ring, and the first baffle ring and the second baffle ring are provided with a slow flow slope on the side away from the overflow hole, wherein the bottom of the first baffle ring is provided with a plurality of through holes, and the paint flows to the second baffle ring through the through holes.

[0014] Preferably, a concentric fixing cylinder is provided at the bottom of the fixing plate, and a conical rebound cover is provided at the end of the fixing cylinder. The conical rebound cover is unfolded downward under normal conditions, and the conical rebound cover is flipped upward to contact the bottom surface of the defoaming plate after being compressed.

[0015] Preferably, the top cover is sealed on the defoaming plate, the outer diameter of the defoaming plate is consistent with the inner diameter of the tank body, and the connecting rod extends upward to be connected to an external hydraulic press, which drives the defoaming plate to rise and fall vertically in the tank body.

[0016] The invention discloses a high-performance coating and a preparation method thereof, comprising the following components by weight, wherein the components include 60-70% of a polyurethane resin, 2-5% of ceramic micropowder, 0.5-1% of a fungicide, 0.2% of a defoamer, 10-15% of xylene, 2% of a leveling agent, 3% of titanium dioxide, 0.2% of an ultraviolet light absorber and a pigment, and further comprising 3-8% of barite powder and 5-10% of an anti-cracking agent. Compared with the prior art, the high-performance coating has a stronger adhesion ability when used, can prevent corrosion and cracking, and has the beneficial effect of good overall performance. The preparation method can effectively eliminate coating bubbles when producing the coating, and can avoid coating loss during the defoaming process, while avoiding secondary generation of bubbles, and has an excellent use effect, which ensures the beneficial effect of smooth coating production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the cooperation state between the defoaming device and the tank body in the present invention.

[0018] Figure 2 The structure of the defoaming device in the present invention is shown in FIG. Figure 1 .

[0019] Figure 3 The structure of the defoaming device in the present invention is shown in FIG. Figure 2 .

[0020] Figure 4 It is a schematic diagram of the structure of the defoaming plate in the present invention.

[0021] Figure 5 It is a top view of the defoaming pan of the present invention.

[0022] Figure 6 The cross section of the defoaming plate of the present invention is shown in FIG. Figure 1 .

[0023] Figure 7 The cross section of the defoaming plate of the present invention is shown in FIG. Figure 2 .

[0024] Figure 8 For the present invention Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0025] Fig. 9 For the present invention Figure 6 Schematic diagram of the enlarged structure at point B in the middle.

[0026] Fig.10 It is a schematic diagram of the structure of the first baffle ring and the second baffle ring of the present invention.

[0027] In the figure: 1, tank body; 2, defoaming plate; 21, arc slope; 22, overflow hole; 23, first blocking ring; 231, through hole; 232, slow flow slope; 24, second blocking ring; 25, center hole; 26, fixed plate; 261, reflux hole; 3, top cover; 31, air vent; 4, connecting rod; 5, fixed cylinder; 6, conical rebound cover. DETAILED DESCRIPTION

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. The accompanying drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and thus only show the components related to the present invention.

[0029] Please refer to Figure 1-10 A high-performance coating comprises the following components by weight, wherein the polyurethane resin is 60-70%, the ceramic micropowder is 2-5%, the bactericide is 0.5-1%, the defoamer is 0.2%, the xylene is 10-15%, the leveling agent is 2%, the titanium dioxide is 3%, the ultraviolet light absorber is 0.2% and the pigment.

[0030] Embodiment 1: The polyurethane resin comprises 65%, ceramic powder 3%, bactericide 0.5%, defoamer 0.2%, xylene 12%, leveling agent 2%, titanium dioxide 3%, and ultraviolet light absorber 0.2%.

[0031] Example 2: polyurethane resin 60%, ceramic powder 2%, bactericide 0.5%, defoamer 0.2%, xylene 10%, leveling agent 2%, titanium dioxide 3%, ultraviolet light absorber 0.2%.

[0032] Example 3: polyurethane resin 70%, ceramic powder 5%, bactericide 1%, defoamer 0.2%, xylene 15%, leveling agent 2%, titanium dioxide 3%, ultraviolet light absorber 0.2%.

[0033] Based on the above embodiments, the high-performance coating of the present invention further includes 3-8% barite powder and 5-10% anti-cracking agent.

[0034] The ceramic micropowder contained in the paint can greatly improve the adhesion ability of the paint, and the UV absorber can block ultraviolet rays to prevent the material from yellowing and discoloration. In addition, titanium dioxide has high hiding power and strong tinting power, which can prevent ultraviolet rays and moisture from penetrating and extend the life of the paint film. In addition, its powder has a small particle size and a large specific surface area, and has super hydrophilic and self-cleaning effects, as well as strong weather resistance and stain resistance, which can improve the overall performance of the paint.

[0035] The present invention further discloses a method for preparing a high-performance coating, comprising the following steps: S1: raw material selection, including selecting resin, pigment and additives; S2: mixing and grinding the resin and pigment in a tank body for 30-60 minutes until the resin is completely dispersed; S3: color adjustment and light adjustment, re-adding pigment to the mixed coating; S4: continuing to add diluent and additives into the tank body, wherein the diluent is water or an alcohol solvent, and the additives are a bactericide, a defoaming agent, xylene, a leveling agent, titanium dioxide, and an ultraviolet light absorber; S5: stirring the mixed coating, diluent and additives, the stirring speed is 600-800r, and the stirring time is 30min; S6: allowing the pigment in S5 to stand and defoam; S7: brushing inspection, taking out a small amount of coating and applying it on the wall, and observing the gloss, color and hardness of the coating.

[0036] In the actual production process, a large number of bubbles are easily generated when the paint is stirred in the tank. These bubbles will float on the surface of the paint. A large number of stable bubbles are not conducive to the smooth production of the paint and affect the quality of painting. Therefore, the first choice during production is to add a large amount of defoaming agent to the paint to eliminate bubbles. The addition of a large amount of defoaming agent will also change the overall composition of the paint. Therefore, it is necessary to add as little as possible during production. Therefore, a defoaming device is needed to achieve defoaming, thereby ensuring smooth production of the paint.

[0037] Specifically, the defoaming device includes a defoaming plate 2 and a top cover 3, wherein an upwardly extending connecting rod 4 is provided at the center of the top cover 3, a plurality of air holes 31 are arranged in an array on the top cover around the connecting rod 4, a plurality of overflow holes 22 are arranged around the surface of the defoaming plate 2, a center hole 25 is provided at the axis of the defoaming plate 2, a fixed plate 26 is provided in the center hole 25, and a plurality of reflux holes 261 are arranged around the fixed plate 26; wherein the top cover 3 is sealingly covered on the defoaming plate 2, the outer diameter of the defoaming plate 2 is straight with the inner diameter of the tank body 1, the connecting rod 4 extends upward and is connected to an external hydraulic press, and the hydraulic press drives the defoaming plate 2 to rise and fall vertically in the tank body 1 to realize paint defoaming.

[0038] Furthermore, the surface of the defoaming disk 2 is provided with a downward arc slope 21, and the arc slope 21 is inclined toward the center hole 25. A first baffle ring 23 and multiple second baffle rings 24 are provided on the arc slope 21. After the paint enters the defoaming disk 2 from the overflow hole 22, it passes over the first baffle ring 23 and the second baffle ring 24 and flows toward the center hole 25.

[0039] During the defoaming process, the hydraulic press is first driven to make the defoaming tray 2 and the top cover 3 move vertically downward continuously, gradually approaching the surface of the coating liquid during the movement, and then continue to move downward. At this time, the coating carries the bubbles through the overflow hole 22 into the defoaming tray 2. Since the overflow hole 22 is arranged at the outermost circle of the defoaming tray 2, the coating carrying the bubbles enters from the circumference of the defoaming tray. When and after the bubbles and the coating liquid enter the defoaming tray 2, some bubbles will be destroyed. At this time, after the hydraulic press lifts the defoaming tray 2, the coating liquid carrying the bubbles will flow along the arc slope. The paint on the surface 21 flows toward the center hole 25, passes through the first blocking ring 23 first, and then passes through the second blocking ring 24; in this process, the remaining bubbles are gradually eliminated during the flow, and the paint entering the defoaming plate 2 finally enters the center hole 25, and enters the tank body 1 again through the reflux hole 261 on the fixed plate 26; in this process, the upper layer of paint and bubbles in the tank body 1 enter the defoaming plate 2, flow and defoam, and then enter the tank body 1 again to achieve circulation, and defoaming is achieved during the circulation process while preventing paint loss.

[0040] In addition, the height of the first baffle ring 23 is higher than that of the second baffle ring 24 . The first baffle ring 23 and the second baffle ring 24 are provided with a slow flow slope 232 on the side away from the overflow hole 22 , wherein the bottom of the first baffle ring 23 is provided with a plurality of through holes 231 , and the paint flows to the second baffle ring 24 through the through holes 231 .

[0041] The multi-layer second blocking ring 24 can increase the flow area of ​​the coating and bubbles and accelerate the defoaming efficiency. In addition, since the first blocking ring 23 and the second blocking ring 24 are provided with a slow flow slope 232 on the side away from the overflow hole 22, the coating will gradually flow toward the center hole 25 along the slow flow slope 232. The coating flows slowly during the entire flow defoaming period, avoiding high-speed flow and generating bubbles again.

[0042] In actual use, when the defoaming plate 2 moves downward, the bubbles and paint in the tank body will directly enter the defoaming plate 2 at the reflux hole 261. At this time, the flow area of ​​the paint and the defoaming effect will be greatly reduced, seriously affecting the efficiency; therefore, a concentric fixed cylinder 5 is provided at the bottom of the fixed plate 26, and an integrated conical rebound cover 6 is provided at the end of the fixed cylinder 5. Under normal circumstances, the conical rebound cover 6 is unfolded downward to form a trumpet shape (such as Figure 6 As shown in FIG. 1 ), the conical rebound cover 6 is pressed and flipped upward to contact the bottom surface of the defoaming plate 2 (as shown in FIG. 1 ). Figure 7 as shown).

[0043] Due to the establishment of the fixed cylinder 5 and the conical rebound cover 6, it is possible to effectively prevent air bubbles and paint from entering the defoaming tray 2 through the reflux hole and the fixed disk 26, thereby ensuring the normal flow and defoaming of the paint. When in use, the defoaming tray 2 moves vertically downward, and after the movement, the bottom opening of the conical rebound cover 6 first contacts the paint surface. At this time, the conical rebound cover 6 is sealed. As the defoaming tray 2 continues to move downward, the pressure in the conical rebound cover 6 gradually increases, and eventually the reverse force of the atmospheric pressure will cause the conical rebound cover 6 to roll up. After rolling up, the conical rebound cover 6 reversely covers the center hole 25 (as well as the fixed disk 26 and the reflux hole 261). At this time, the paint carrying bubbles will not enter the defoaming tray 2 from the reflux hole 261, and can only enter the defoaming tray 2 from the overflow hole 22, and then enter the center hole 25 through the first blocking ring 23 and the second blocking ring 24, and finally flow into the tank body 1 through the reflux hole 261.

[0044] During the entire defoaming process, the conical rebound cover 6 is in an expanded state, and the paint first drips onto the conical rebound cover 6 from the reflux hole 261, and then drips into the tank body 1 along the outer wall of the conical rebound cover 6, thereby preventing the paint from directly dripping in and generating bubbles again. The entire defoaming device can not only play a defoaming role, but also avoid the secondary generation of bubbles, and the use effect is excellent.

[0045] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A high performance coating, characterized in that: The invention comprises the following components by weight, wherein the polyurethane resin is 60-70%, the ceramic micro powder is 2-5%, the bactericide is 0.5-1%, the defoamer is 0.2%, the xylene is 10-15%, the leveling agent is 2%, the titanium dioxide is 3%, the ultraviolet light absorber is 0.2% and the pigment.

2. The high performance coating according to claim 1, characterized in that: The polyurethane resin comprises 65%, ceramic micropowder 3%, bactericide 0.5%, defoamer 0.2%, xylene 12%, leveling agent 2%, titanium dioxide 3% and ultraviolet light absorber 0.2%.

3. The high performance coating according to claim 1 or 2, characterized in that: It also includes 3-8% barite powder and 5-10% anti-cracking agent.

4. A method for preparing a high-performance coating, characterized in that: The process includes the following steps: S1: raw material selection, including selection of resin, pigment and additives; S2: mixing and grinding the resin and pigment in a tank for 30-60 minutes until the resin is completely dispersed; S3: color adjustment and light adjustment, adding pigment to the mixed and ground paint again; S4: Continue to add diluent and additives into the tank; S5: Stir the mixed paint, diluent and additives at a speed of 600-800r for 30min; S6: Let the pigment in S5 stand to defoam; S7: Paint inspection, take out a small amount of paint and apply it on the wall, and observe the gloss, color and hardness of the paint.

5. The method for preparing a high performance coating according to claim 4, characterized in that: The diluent in step S4 is water or an alcohol solvent.

6. The method for preparing a high performance coating according to claim 4, characterized in that: In the step S6, defoaming is performed in the tank body by a defoaming device, the defoaming device comprises a defoaming plate and a top cover, a connecting rod extending upward is provided at the center of the top cover, a plurality of air holes are provided in an array around the connecting rod, a plurality of overflow holes are provided around the surface of the defoaming plate, a central hole is provided at the axis of the defoaming plate, a fixed plate is provided in the central hole, and a plurality of reflux holes are provided around the fixed plate.

7. The method for preparing a high performance coating according to claim 6, characterized in that: The surface of the defoaming disk is provided with a downward arc slope, which is inclined toward the center hole. A first baffle ring and multiple second baffle rings are provided on the arc slope. After the paint enters the defoaming disk from the overflow hole, it passes over the first baffle ring and the second baffle ring and flows toward the center hole.

8. The method for preparing a high performance coating according to claim 6, characterized in that: The height of the first baffle ring is higher than that of the second baffle ring. The first baffle ring and the second baffle ring are provided with a slow flow slope on the side away from the overflow hole. The bottom of the first baffle ring is provided with a plurality of through holes, and the paint flows to the second baffle ring through the through holes.

9. The method for preparing a high performance coating according to claim 7, characterized in that: A concentric fixing cylinder is provided at the bottom of the fixing plate, and a conical rebound cover is provided at the end of the fixing cylinder. The conical rebound cover is unfolded downward under normal conditions, and the conical rebound cover is flipped upward to contact the bottom surface of the defoaming plate after being compressed.

10. The method for preparing a high performance coating according to claim 6, characterized in that: The top cover is sealed on the defoaming disc, the outer diameter of the defoaming disc is consistent with the inner diameter of the tank body, the connecting rod extends upward and is connected to an external hydraulic press, and the hydraulic press drives the defoaming disc to rise and fall vertically in the tank body.

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