An anti-corrosion coating for the interior wall of a green environmental protection building

Abstract

The present invention belongs to the technical field of coatings, and particularly relates to a green and environment-friendly anti-corrosion coating for interior walls of buildings. A preservative, the active ingredient of the preservative is composed of benzethonium chloride and carbendazim in a mass ratio of 1-9:3. The preservative of the present invention shows a synergistic effect on inhibiting various molds, can improve the inhibitory effect on molds, and based on this, the addition amount of the preservative can be reduced and the cost can be lowered. The preservative component added in the green and environment-friendly anti-corrosion coating for interior walls of buildings of the present invention can resist the interference of microorganisms on the coating, and thus is beneficial to prolonging the storage time of the coating.

Description

Technical Field

[0001] The present invention belongs to the technical field of coatings, and particularly relates to a green and environment-friendly anti-corrosion coating for interior walls of buildings. Background Art

[0002] Anti-corrosion coatings contain organic substances, which provide basic conditions for the growth and reproduction of microorganisms. Under suitable conditions, it will promote the large-scale growth and reproduction of microorganisms. During this process, metabolites such as enzymes and organic acids produced by microorganisms will cause changes in the odor, color, viscosity, etc. of the coating, resulting in product deterioration. Preservatives can inhibit the growth of microorganisms. Adding an appropriate amount and suitable preservative in the product can effectively prevent the invasion of microorganisms and ensure that no spoilage occurs during the production and storage of the coating.

[0003] Benzethonium chloride is easily soluble in water to form a foamy soapy solution, and is soluble in ethanol, acetone and chloroform. It is used as a bactericidal and disinfectant, has good surface activity, and is widely used in the fields of daily chemicals and medicine as an anti-corrosion and bactericidal agent. However, using a single component of benzethonium chloride as a preservative has limited effects, and long-term use is likely to cause molds to develop resistance to it, resulting in a reduction in the anti-corrosion effect.

[0004] The patent of the prior art CN201010604560.X discloses a bactericidal and anti-corrosion composition containing benzethonium chloride and its uses. In this patent, it is disclosed that benzethonium chloride is used in combination with anti-fungal agents such as p-hydroxybenzoate and / or 3-iodo-2-propynyl butylcarbamate. This can not only improve the antibacterial performance of benzethonium chloride against bacteria, but also significantly improve its antibacterial ability against fungi, with a broad bactericidal spectrum and stable effects. It can be widely used as an anti-corrosion and bactericidal agent in personal care products such as cosmetics, wet wipes, nursing lotions and hand sanitizers. However, there has been no relevant report on the combined use of benzethonium chloride and carbendazim.

[0005] The information disclosed in this background art section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide a green and environment-friendly anti-corrosion coating for interior walls of buildings to solve the problems existing when using a single component of benzethonium chloride as a preservative in the background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A preservative, the active ingredients of the preservative are composed of benzethonium chloride and carbendazim mixed in a mass ratio of 1-9:2-1.

[0009] The present invention also provides a green and environment-friendly anti-corrosion coating for interior walls of buildings, which comprises the above-mentioned preservative and is prepared from the following components in parts by weight: 30-60 parts of waterborne acrylic emulsion, 3-6 parts of film-forming auxiliary, 2-5 parts of dispersant, 20-40 parts of filler, 6-8 parts of thickener, 1-2 parts of defoamer, 0.2-0.3 part of pH regulator, 1-2 parts of the preservative, and 25-30 parts of deionized water.

[0010] Preferably, the film-forming auxiliary is Eastman Texanol.

[0011] Preferably, the dispersant is BYK 163.

[0012] Preferably, the filler is calcined kaolin.

[0013] Preferably, the thickener is WT-105A associative polyurethane.

[0014] Preferably, the defoamer is AFE-3168 defoamer.

[0015] Preferably, the pH regulator is dimethylethanolamine.

[0016] The present invention also provides a preparation method of the above-mentioned green and environment-friendly anti-corrosion coating for interior walls of buildings, specifically as follows: Mix the waterborne acrylic emulsion, filler, 1 / 2 of the dispersant, 1 / 2 of the defoamer and deionized water evenly, stir at 800 rpm for 30 min, then grind with a grinder, and sieve through a 150-200 mesh sieve; then add the film-forming auxiliary, 1 / 2 of the dispersant, 1 / 2 of the defoamer, pH regulator, thickener and preservative, mix evenly and stir at 1200 rpm for 40 min to obtain the green and environment-friendly anti-corrosion coating for interior walls of buildings.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The preservative of the present invention shows a synergistic effect on inhibiting various molds, can improve the inhibition effect on molds, and based on this, the addition amount of the preservative can be reduced and the cost can be lowered. The preservative component added in the green and environment-friendly anti-corrosion coating for interior walls of buildings of the present invention can resist the interference of microorganisms to the coating, and thus is beneficial to prolonging the storage time of the coating. Detailed Embodiments

[0019] The technical solutions of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those skilled in the art within the scope of the present invention without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0020] Example 1

[0021] 1. Tested molds

[0022] See Table 1 for details.

[0023] Table 1 Tested molds

[0024]

[0025] 2. Test agents

[0026] 99% benzethonium chloride technical, 98% carbendazim technical

[0027] Dissolve with DMSO, and then prepare single-agent stock solutions with 0.1% Tween-80 aqueous solution. Set multiple groups of ratios. Each single agent and each group of ratios are then diluted into 5 mass concentration gradients with 0.1% Tween-80 aqueous solution according to the geometric ratio method for standby.

[0028] 3. Test methods

[0029] 3.1 Fungi

[0030] Mycelial growth rate method. Mix 1 mL of the test agent with 9 mL of melted PDA medium and pour it into a sterile petri dish to make a drug-containing plate. After the medium solidifies, place 1 mold disc (5 mm in diameter) in the center of the drug-containing plate, using 0.1% Tween-80 aqueous solution as the control. Set 3 replicates for each treatment. Place it in an incubator and culture at 28 ± 1 °C for 3 days. Then measure the growth diameter of the mold colony by the cross method and calculate the inhibition rate.

[0031]

[0032] 4. Data analysis

[0033] Use DPS software to perform regression analysis on the logarithm of the test agent concentration and the probit value of the mycelial growth inhibition rate, calculate the EC 50 of each treatment agent, and evaluate the synergistic effect according to Wadlley method.

[0034] SR ≥ 1.5 indicates a synergistic effect; SR ≤ 0.5 indicates an antagonistic effect; 0.5 < SR < 1.5 indicates an additive effect. The results are shown in Table 1-3.

[0035] Table 1 Toxicity of the combination of benzethonium chloride (A) and carbendazim (B) against Aspergillus versicolor

[0036]

[0037] As can be seen from Table 1, the synergistic coefficients of benzethonium chloride and carbendazim against Aspergillus versicolor are all greater than 1.5 in the mass ratio range of 1-9:2-1, showing a synergistic effect.

[0038] Table 2 Toxicity of the combination of benzethonium chloride (A) and carbendazim (B) against Penicillium purpurogenum

[0039]

[0040] As can be seen from Table 2, the synergistic coefficients of benzethonium chloride and carbendazim against Penicillium purpurogenum are all greater than 1.5 in the mass ratio range of 1 - 9:2 - 1, showing a synergistic effect.

[0041] Table 3 Toxicity of the combination of benzethonium chloride (A) and carbendazim (B) against Aspergillus niger

[0042]

[0043] As can be seen from Table 3, the synergistic coefficients of benzethonium chloride and carbendazim against Aspergillus niger are all greater than 1.5 in the mass ratio range of 1 - 9:2 - 1, showing a synergistic effect.

[0044] Example 2

[0045] A green and environmentally friendly anti - corrosion coating for interior walls of buildings is prepared from the following components: 42 kg of aqueous acrylic emulsion, 5 kg of Eastman dodecyl alcohol ester, 4.5 kg of BYK 163 dispersant, 24 kg of calcined kaolin, 7 kg of WT - 105A associative polyurethane, 2 kg of AFE - 3168 defoamer, 0.3 kg of dimethylethanolamine, 1.4 kg of preservative and 30 kg of deionized water; among them, the preservative is composed of benzethonium chloride and carbendazim mixed in a mass ratio of 3:1.

[0046] The preparation method of the above - mentioned coating is as follows: Mix the aqueous acrylic emulsion, calcined kaolin, 1 / 2 of the BYK 163 dispersant, 1 / 2 of the AFE - 3168 defoamer and deionized water evenly, stir at 800 revolutions per minute for 30 minutes, then grind with a grinder and pass through a 180 - mesh sieve; then add Eastman dodecyl alcohol ester, dimethylethanolamine, 1 / 2 of the BYK 163 dispersant, 1 / 2 of the AFE - 3168 defoamer, preservative and WT - 105A associative polyurethane, mix evenly and stir at 1200 revolutions per minute for 40 minutes to obtain the green and environmentally friendly anti - corrosion coating for interior walls of buildings.

[0047] The foregoing description of specific exemplary embodiments of the invention is for purposes of illustration and exemplification. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that, according to the above teachings, many modifications and variations are possible. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the invention and its practical applications, so that those skilled in the art can implement and utilize the various different exemplary embodiments of the invention, as well as various different selections and modifications. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. Use of a preservative in inhibiting Aspergillus versicolor, Penicillium purpurogenum, and Aspergillus niger, characterized in that, The active ingredients of the preservative are composed of benzethonium chloride and carbendazim mixed in a mass ratio of 1-9:2-1.

2. A green and environment-friendly interior wall anticorrosive paint for buildings comprising the preservative described in claim 1, characterized in that, It is prepared from the following components by weight: 30-60 parts of aqueous acrylic emulsion, 3-6 parts of film-forming aid, 2-5 parts of dispersant, 20-40 parts of filler, 6-8 parts of thickener, 1-2 parts of defoamer, 0.2-0.3 parts of pH regulator, 1-2 parts of the preservative and 25-30 parts of deionized water.

3. The anti-corrosion coating for the inner wall of a green environmental protection building according to claim 2, wherein The film-forming aid is Eastman Texanol.

4. The anti-corrosion coating for the interior wall of a green environmental protection building according to claim 2, wherein The dispersant is BYK163.

5. The green environmental protection building interior wall anticorrosive paint according to claim 2, characterized in that, The filler is calcined kaolin.

6. The green and environment-friendly interior wall anticorrosive paint according to claim 2, wherein The thickener is WT-105A associative polyurethane.

7. The anti-corrosion coating for the inner wall of a green environmental protection building according to claim 2, wherein The defoamer is AFE-3168 defoamer.

8. The anti-corrosion coating for the interior wall of a green environmental protection building according to claim 2, wherein The pH regulator is dimethylethanolamine.

9. The preparation method of the green environmental protection building interior wall anti-corrosion coating according to any one of claims 2-8, characterized in that, Specifically: Mix the aqueous acrylic emulsion, filler, 1 / 2 of the dispersant, 1 / 2 of the defoamer and deionized water evenly, stir at 800 rpm for 30 min, then grind with a grinder and pass through a 150-200 mesh sieve; then add the film-forming aid, 1 / 2 of the dispersant, 1 / 2 of the defoamer, pH regulator, thickener and preservative, mix evenly and stir at 1200 rpm for 40 min to obtain the green and environmentally friendly interior wall anticorrosive coating for buildings.

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