Mirror reflection coating and preparation method thereof

Abstract

The invention provides a specular reflection coating and a preparation method thereof. The coating comprises a base material and an additive, the base material comprises the following components in parts by weight: 30-40 parts of tetraethoxysilane, 15-20 parts of alkyd resin, 16-22 parts of amino resin, 10-15 parts of transparent relief powder and 5-10 parts of reflective powder; the additive comprises the following components in parts by weight: 2-3 parts of an anti-pollution agent and 1.5-2 parts of an antibacterial agent. According to the specular reflection coating provided by the invention, the anti-pollution agent is introduced, so that pollutants such as stains and grease are effectively prevented from being attached and eroded on the surface of the coating, and the pollution resistance of the coating is improved; according to the mirror reflection coating provided by the invention, the antibacterial agent is introduced to inhibit growth and reproduction of bacteria on the surface of the coating, so that the antibacterial effect of the coating is improved, and the service life of the coating is prolonged. And the anti-pollution agent and the antibacterial agent are added, so that the coating disclosed by the invention has excellent anti-pollution performance and antibacterial performance.

Description

Technical Field

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

[0002] Paint is a material that is applied to the surface of an object to be protected or decorated and can form a continuous film that is firmly attached to the object. This material is usually a viscous liquid made of resin, oil, emulsion, with or without pigments, fillers, and corresponding additives, and is prepared with organic solvents or water.

[0003] Mirror reflective paint is a hard coating with high gloss, high contrast reflective effect, usually containing special reflective particles and pigments.

[0004] In urban environments, mirror reflective coatings are easily contaminated due to the presence of various bacteria, dust and pollutants in the atmosphere. Once the coating is contaminated by bacteria, dust and pollutants, its reflective ability will be greatly reduced, affecting the aesthetics and use effect. Summary of the invention

[0005] In view of the above-mentioned deficiencies, the present invention provides a mirror reflection coating and a preparation method thereof.

[0006] The object of the present invention is to provide a mirror reflection coating, which comprises a base material and an additive;

[0007] The base material includes the following components in parts by weight: 30-40 parts of tetraethyl orthosilicate, 15-20 parts of alkyd resin, 16-22 parts of amino resin, 10-15 parts of transparent relief powder, and 5-10 parts of reflective powder;

[0008] The additive comprises the following components in parts by weight: 2-3 parts of anti-pollution agent and 1.5-2 parts of antibacterial agent.

[0009] Preferably, the grinding fineness of the transparent relief powder is 10-20 μm.

[0010] Preferably, the reflective powder has a grinding fineness of 10-20 μm.

[0011] The mirror reflective coating provided by the invention uses alkyd resin and amino resin as a matrix, and introduces transparent relief powder and reflective powder with a grinding fineness of 10-20 μm, so that the coating has a high-brightness, high-contrast reflective effect.

[0012] Preferably, the anti-pollution agent is prepared from fluororesin, fluorocarbon surfactant, fluorocarbon acrylate, fluorocarbon ether and polytetrafluoroethylene, and the weight ratio of fluororesin, fluorocarbon surfactant, fluorocarbon acrylate, fluorocarbon ether and polytetrafluoroethylene is (4-6):(2-4):(2-3):(1-2):(1-2).

[0013] The mirror reflective coating provided by the present invention improves the anti-pollution ability of the coating by introducing an anti-pollution agent. Anti-pollution agent components such as fluororesin, fluorocarbon surfactant, fluorocarbon acrylate, fluorocarbon ether and polytetrafluoroethylene work synergistically in the coating to jointly improve the anti-pollution ability of the coating. They effectively prevent the adhesion and erosion of pollutants such as stains and grease on the surface of the coating by reducing the surface energy of the coating, enhancing the wettability and spreadability of the coating, and forming a dense protective film. At the same time, these components also have good chemical stability and high temperature stability, and can maintain their performance in various harsh environments, thereby ensuring that the coating has long-term anti-pollution ability.

[0014] Preferably, the antibacterial agent is prepared from nano titanium dioxide and nano zinc oxide, and the weight ratio of nano titanium dioxide to nano zinc oxide is (1-2): (3-4).

[0015] The mirror reflective coating provided by the present invention improves the antibacterial effect of the coating by introducing an antibacterial agent to inhibit the growth and reproduction of bacteria on the surface of the coating, thereby extending the service life of the coating. After nano-titanium dioxide and nano-zinc oxide are combined in the coating, they can play a synergistic role. The photocatalytic effect of nano-titanium dioxide can generate highly active free radicals, which can destroy the cell membrane and cell structure of bacteria; nano-zinc oxide destroys the bacterial structure by releasing zinc ions. The two work together to significantly improve the antibacterial properties of the coating. In addition, the antibacterial effect of nano-titanium dioxide depends on the photocatalytic effect, so it is best under light conditions; while nano-zinc oxide is not limited by light conditions and can play an antibacterial role in any environment.

[0016] Preferably, the mirror reflective coating further comprises auxiliary materials, and the auxiliary materials comprise the following components in parts by weight: 5-6 parts of silica sol, 2-3 parts of adipic acid, 1-5 parts of neopentyl glycol, 2-4 parts of sodium pyrophosphate, and 3-4 parts of oleic acid.

[0017] Preferably, the mirror reflective coating further includes additives, which include the following components in parts by weight: 3-5 parts of anti-ultraviolet agent, 2-3 parts of surfactant, 1-3 parts of coupling agent, 1-2 parts of plasticizer, 0.5-1 parts of matting agent, 0.5-1 parts of dispersant, 0.2-0.8 parts of defoaming agent, and 1-1.5 parts of optical brightener.

[0018] Another object of the present invention is to provide a method for preparing a mirror reflective coating, comprising the following steps:

[0019] S1. The base material was mixed and stirred uniformly and then ground in a sand mill to obtain a mixture A;

[0020] S2. The auxiliary material and the mixture A are mixed and stirred to obtain a mixture B;

[0021] S3. The additive is mixed with the mixture B and stirred to obtain a mixture C;

[0022] S4. The anti-ultraviolet agent, the surfactant, the coupling agent, the plasticizer, the matting agent, the optical brightener and the mixture C are mixed and stirred to obtain a mixture D;

[0023] S5. After the dispersant, the defoamer and the mixture D are mixed and stirred evenly, the mixture is dispersed, ground, sieved and allowed to stand to obtain a mirror reflective coating.

[0024] Preferably, in step S1, the stirring axis speed of the sand mill is 9-12 m / s.

[0025] Preferably, the grinding pressure in step S1 is 0.1-0.2 MPa. DETAILED DESCRIPTION

[0026] The following is a further clear and complete description of the technical features in the technical solution provided by the present invention in conjunction with the specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] A mirror reflection coating is prepared by the following steps:

[0029] 1. Raw material preparation;

[0030] Base material: 30 parts of tetraethyl orthosilicate, 15 parts of alkyd resin, 16 parts of amino resin, 10 parts of transparent relief powder, 5 parts of reflective powder;

[0031] Additives: 2 parts of anti-pollution agent, 1.5 parts of antibacterial agent;

[0032] Auxiliary materials: 5 parts of silica sol, 2 parts of adipic acid, 1 part of neopentyl glycol, 2 parts of sodium pyrophosphate, and 3 parts of oleic acid;

[0033] Additives: 3 parts of anti-ultraviolet agent, 2 parts of surfactant, 1 part of plasticizer, 1 part of coupling agent, 0.5 parts of matting agent, 0.5 parts of dispersant, 0.2 parts of defoaming agent, and 1 part of optical brightener.

[0034] 2. Preparation of mirror reflective coating;

[0035] S1. The base materials were mixed and stirred at a temperature of 25 ° C for 90 min, and then placed in a sand mill for grinding to obtain a mixture A;

[0036] S2. The auxiliary material is mixed with the mixture A, stirred at 30 ° C for 80 min, and stirred evenly to obtain a mixture B;

[0037] S3. The additive was mixed with the mixture B, stirred at 30 ° C for 80 min, and stirred evenly to obtain a mixture C;

[0038] S4. Mix the anti-ultraviolet agent, the surfactant, the coupling agent, the plasticizer, the matting agent, the optical brightener and the mixture C, stir at 15° C. for 30 min, and stir evenly to obtain a mixture D;

[0039] S5. Mix the dispersant, the defoamer and the mixture D, stir at 15° C. for 25 min, and after stirring evenly, disperse, grind, sieve and let stand to obtain a mirror reflective coating.

[0040] In step S1, the grinding fineness of the transparent relief powder is 10 μm.

[0041] In step S1, the grinding fineness of the reflective powder is 10 μm.

[0042] In step S1, the linear speed of the stirring shaft of the sand mill is 9 m / s.

[0043] In step S1, the grinding pressure is 0.1 MPa.

[0044] In step S3, the anti-pollution agent is prepared from fluororesin, fluorocarbon surfactant, fluorocarbon acrylate, fluorocarbon ether, and polytetrafluoroethylene, wherein the weight ratio of the fluororesin, fluorocarbon surfactant, fluorocarbon acrylate, fluorocarbon ether, and polytetrafluoroethylene is 4:2:2:1:1.

[0045] In step S3, the antibacterial agent is prepared from nano titanium dioxide and nano zinc oxide, wherein the weight ratio of nano titanium dioxide to nano zinc oxide is 1:2.

[0046] Example 2

[0047] A mirror reflection coating is prepared by the following steps:

[0048] 1. Raw material preparation;

[0049] Base material: 35 parts of tetraethyl orthosilicate, 18 parts of alkyd resin, 19 parts of amino resin, 13 parts of transparent relief powder, 8 parts of reflective powder;

[0050] Additives: 2.5 parts of anti-pollution agent, 1.75 parts of antibacterial agent;

[0051] Auxiliary materials: 5.5 parts of silica sol, 2.5 parts of adipic acid, 3 parts of neopentyl glycol, 3 parts of sodium pyrophosphate, and 3.5 parts of oleic acid;

[0052] Additives: 4 parts of anti-ultraviolet agent, 2.5 parts of surfactant, 1.5 parts of plasticizer, 2 parts of coupling agent, 0.8 parts of matting agent, 0.8 parts of dispersant, 0.5 parts of defoaming agent, and 1.2 parts of optical brightener.

[0053] 2. Preparation of mirror reflective coating;

[0054] S1. The base materials were mixed and stirred at a temperature of 25 ° C for 90 min, and then placed in a sand mill for grinding to obtain a mixture A;

[0055] S2. The auxiliary material is mixed with the mixture A, stirred at 30 ° C for 80 min, and stirred evenly to obtain a mixture B;

[0056] S3. The additive was mixed with the mixture B, stirred at 30 ° C for 80 min, and stirred evenly to obtain a mixture C;

[0057] S4. Mix the anti-ultraviolet agent, the surfactant, the coupling agent, the plasticizer, the matting agent, the optical brightener and the mixture C, stir at 15° C. for 30 min, and stir evenly to obtain a mixture D;

[0058] S5. Mix the dispersant, the defoamer and the mixture D, stir at 15° C. for 25 min, and after stirring evenly, disperse, grind, sieve and let stand to obtain a mirror reflective coating.

[0059] In step S1, the grinding fineness of the transparent relief powder is 15 μm.

[0060] In step S1, the grinding fineness of the reflective powder is 15 μm.

[0061] In step S1, the linear speed of the stirring shaft of the sand mill is 10.5 m / s.

[0062] In step S1, the grinding pressure is 0.15 MPa.

[0063] In step S3, the anti-pollution agent is prepared from fluororesin, fluorocarbon surfactant, fluorocarbon acrylate, fluorocarbon ether and polytetrafluoroethylene, wherein the weight ratio of fluororesin, fluorocarbon surfactant, fluorocarbon acrylate, fluorocarbon ether and polytetrafluoroethylene is 5:3:2.5:1.5:1.5.

[0064] In step S3, the antibacterial agent is prepared from nano titanium dioxide and nano zinc oxide, wherein the weight ratio of nano titanium dioxide to nano zinc oxide is 1.5:3.

[0065] Example 3

[0066] A mirror reflection coating is prepared by the following steps:

[0067] 1. Raw material preparation;

[0068] Base material: 40 parts of tetraethyl orthosilicate, 20 parts of alkyd resin, 22 parts of amino resin, 15 parts of transparent relief powder, 10 parts of reflective powder;

[0069] Additives: 3 parts of anti-pollution agent, 2 parts of antibacterial agent;

[0070] Auxiliary materials: 6 parts of silica sol, 3 parts of adipic acid, 5 parts of neopentyl glycol, 4 parts of sodium pyrophosphate, and 4 parts of oleic acid;

[0071] Additives: 5 parts of anti-ultraviolet agent, 3 parts of surfactant, 2 parts of plasticizer, 3 parts of coupling agent, 1 part of matting agent, 1 part of dispersant, 0.8 parts of defoaming agent, and 1.5 parts of optical brightener.

[0072] 2. Preparation of mirror reflective coating;

[0073] S1. The base materials were mixed and stirred at a temperature of 25 ° C for 90 min, and then placed in a sand mill for grinding to obtain a mixture A;

[0074] S2. The auxiliary material is mixed with the mixture A, stirred at 30 ° C for 80 min, and stirred evenly to obtain a mixture B;

[0075] S3. The additive was mixed with the mixture B, stirred at 30 ° C for 80 min, and stirred evenly to obtain a mixture C;

[0076] S4. Mix the anti-ultraviolet agent, the surfactant, the coupling agent, the plasticizer, the matting agent, the optical brightener and the mixture C, stir at 15° C. for 30 min, and stir evenly to obtain a mixture D;

[0077] S5. Mix the dispersant, the defoamer and the mixture D, stir at 15° C. for 25 min, and after stirring evenly, disperse, grind, sieve and let stand to obtain a mirror reflective coating.

[0078] In step S1, the grinding fineness of the transparent relief powder is 20 μm.

[0079] In step S1, the grinding fineness of the reflective powder is 20 μm.

[0080] In step S1, the linear speed of the stirring shaft of the sand mill is 12 m / s.

[0081] In step S1, the grinding pressure is 0.2 MPa.

[0082] In step S3, the anti-pollution agent is prepared from fluororesin, fluorocarbon surfactant, fluorocarbon acrylate, fluorocarbon ether, and polytetrafluoroethylene, wherein the weight ratio of the fluororesin, fluorocarbon surfactant, fluorocarbon acrylate, fluorocarbon ether, and polytetrafluoroethylene is 6:4:3:2:2.

[0083] In step S3, the antibacterial agent is prepared from nano titanium dioxide and nano zinc oxide, wherein the weight ratio of nano titanium dioxide to nano zinc oxide is 2:4.

[0084] Example 4

[0085] This embodiment provides a mirror reflective coating, and compared with the embodiment 1, the difference in composition is that the anti-pollution agent is prepared from fluororesin, fluorocarbon surfactant, and fluorocarbon acrylate, and the weight ratio of fluororesin, fluorocarbon surfactant, and fluorocarbon acrylate is 4:2:2. Except for the above differences, the materials, formula ratios, and preparation operations used in this embodiment are strictly consistent with those in the embodiment 1.

[0086] Example 5

[0087] This embodiment provides a mirror reflective coating, and compared with the embodiment 1, the difference in composition is that the antibacterial agent is prepared only from nano titanium dioxide. In addition to the above differences, the materials, formula ratios and preparation operations used in this embodiment are strictly consistent with those in the embodiment 1.

[0088] Test Case

[0089] The mirror reflective coatings prepared in Examples 1-5 and a common mirror reflective coating were selected for coating test. The mirror reflective coatings and a common mirror reflective coating were coated on the sample plates respectively and then the anti-pollution performance was tested after they were dried and cured. The final test results are shown in Table 1:

[0090] Table 1 Test results of relevant properties of mirror reflective coatings

[0091]

[0092] The reflectivity changes of the mirror reflective coatings of Examples 1 to 3 before and after pollution were relatively small, at 2%, 2.13% and 2.19% respectively, which shows that these coatings have excellent anti-pollution performance. The reflectivity changes of the mirror reflective coatings of Examples 4 and 5 before and after pollution were relatively large, at 2.85% and 2.75% respectively, but still better than the 6% of ordinary mirror reflective coatings. This shows that although the anti-pollution performance of Examples 4 and 5 is slightly inferior to that of Examples 1-3, it is still at a good level. The anti-pollution performance of ordinary mirror reflective coatings is the worst, and the reflectivity change before and after pollution reaches 6%.

[0093] After cleaning, the mirror reflective coatings of Examples 1 to 3 only leave a small amount of fine particles, which are sparsely distributed, indicating that these coatings have good anti-pollution residual performance. After cleaning, the mirror reflective coatings of Examples 4 and 5 have a moderate number of particles remaining, which are evenly distributed. Although not as good as Examples 1-3, they are still better than ordinary mirror reflective coatings. Ordinary mirror reflective coatings also have a moderate number of particles remaining after cleaning, which are evenly distributed and perform the worst.

[0094] In Examples 1 to 3, the anti-pollution agent is prepared from fluororesin, fluorocarbon surfactant, fluorocarbon acrylate, fluorocarbon ether, and polytetrafluoroethylene, and the proportion of each component is gradually increased, which may be one of the reasons for the gradual enhancement of the anti-pollution performance. However, Example 4 reduces the proportion of fluorocarbon ether and polytetrafluoroethylene, resulting in a decrease in the anti-pollution performance.

[0095] In terms of antibacterial agents, the proportion of nano-titanium dioxide and nano-zinc oxide gradually increased in Examples 1 to 3, but did not significantly affect the anti-pollution performance. Example 5 only used nano-titanium dioxide as an antibacterial agent, and the anti-pollution performance was slightly lower than that of Examples 1 to 3, indicating that the combined use of nano-titanium dioxide and nano-zinc oxide has a certain contribution to the anti-pollution performance.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the specification of this application, the technicians can still modify or replace the specific implementation mode of the present invention with equivalents, but these modifications or changes do not deviate from the scope of protection of the pending claims of the present application.

Claims

1. A mirror reflective coating, characterized in that: Including base materials and additives; The base material comprises the following components in parts by weight: 30-40 parts of tetraethyl orthosilicate, 15-20 parts of alkyd resin, 16-22 parts of amino resin, 10-15 parts of transparent relief powder, and 5-10 parts of reflective powder; The additive comprises the following components in parts by weight: 2-3 parts of anti-pollution agent and 1.5-2 parts of antibacterial agent.

2. The mirror reflective coating according to claim 1, characterized in that: The grinding fineness of the transparent relief powder is 10-20 μm.

3. The mirror reflective coating according to claim 1, characterized in that: The grinding fineness of the reflective powder is 10-20 μm.

4. The mirror reflective coating according to claim 1, characterized in that: The anti-pollution agent is prepared from fluororesin, fluorocarbon surfactant, fluorocarbon acrylate, fluorocarbon ether and polytetrafluoroethylene, and the weight ratio of the fluororesin, fluorocarbon surfactant, fluorocarbon acrylate, fluorocarbon ether and polytetrafluoroethylene is (4-6): (2-4): (2-3): (1-2): (1-2).

5. The mirror reflective coating according to claim 1, characterized in that: The antibacterial agent is prepared from nano titanium dioxide and nano zinc oxide, and the weight ratio of the nano titanium dioxide to the nano zinc oxide is (1-2): (3-4).

6. The mirror reflective coating according to claim 1, characterized in that: The mirror reflective coating also includes auxiliary materials, which include the following components in parts by weight: 5-6 parts of silica sol, 2-3 parts of adipic acid, 1-5 parts of neopentyl glycol, 2-4 parts of sodium pyrophosphate, and 3-4 parts of oleic acid.

7. The mirror reflective coating according to claim 1, characterized in that: The mirror reflective coating also includes additives, which include the following components in parts by weight: 3-5 parts of anti-ultraviolet agent, 2-3 parts of surfactant, 1-3 parts of coupling agent, 1-2 parts of plasticizer, 0.5-1 parts of matting agent, 0.5-1 parts of dispersant, 0.2-0.8 parts of defoaming agent, and 1-1.5 parts of optical brightener.

8. A method for preparing the specular reflective coating according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. The base material was mixed and stirred uniformly and then ground in a sand mill to obtain a mixture A; S2. The auxiliary material and the mixture A are mixed and stirred to obtain a mixture B; S3. The additive is mixed with the mixture B and stirred to obtain a mixture C; S4. The anti-ultraviolet agent, the surfactant, the coupling agent, the plasticizer, the matting agent, the optical brightener and the mixture C are mixed and stirred to obtain a mixture D; S5. After the dispersant, the defoamer and the mixture D are mixed and stirred evenly, the mixture is dispersed, ground, sieved and allowed to stand to obtain a mirror reflective coating.

9. The preparation method according to claim 8, characterized in that: The stirring axis speed of the sand mill in step S1 is 9-12 m / s.

10. The preparation method according to claim 8, characterized in that: The grinding pressure in step S1 is 0.1-0.2Mpa.

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