Multifunctional repairing agent for repairing water white and alkali bloom of rain mark of repair coating and preparation method thereof

Abstract

The present application relates to a kind of repair paint rain mark white alkali flower and the preparation method of multifunctional repair agent, and by the following raw materials: deionized water, bactericide, pH regulator, epoxy modified organosilicon compound, propylene glycol methyl ether, hydroxyphenyl-benzotriazole, amine radical trapping agent, film forming aid.The multifunctional repair agent is used in the coating film that has been white mark alkali flower, just needs to be rolled over, can quickly eliminate white mark alkali flower, simple operation, high construction efficiency, low cost, while improving coating film drying efficiency, film forming efficiency is improved;And the bonding performance with coating film is good, coating is dense, has good hydrophobic effect, weather resistance, and has good storage stability.

Description

Technical Field

[0001] This invention relates to the field of construction, and in particular to a multifunctional repair agent for repairing rain streaks, water whitening, efflorescence, and discoloration of paint, and its preparation method. Background Technology

[0002] All paint coatings contain water-soluble, non-volatile, high-molecular-weight organic substances. These organic substances are hydrophilic and are typically introduced by emulsion emulsifiers and protective colloids, polyphosphates and acrylic dispersants, thickeners, wetting agents, and colorants within the paint. These hydrophilic substances are essential in water-based paint formulations. After complete curing, these hydrophilic substances are well-bonded within the paint film and are not easily dissolved from the dry film, thus ensuring safety and reliability.

[0003] Generally speaking, depending on the type and amount of emulsion, as well as the formulation of film-forming aids and co-solvents, the curing and drying time of paint at 23℃ and 50% relative humidity requires at least three to five days. National standards typically require a week to test the physicochemical properties of the paint film, with thick coatings requiring fourteen days. International standards often require a month of drying time. It is true that paint needs this much time to fully cure and form a film. Under unfavorable conditions of low temperature and high humidity, the curing time of the paint film will be further extended. For this reason, if the paint encounters high humidity, rainy season, and low temperatures at night within 2 to 24 hours after application, hydrophilic substances within the paint film surface easily migrate to the surface. After freezing at night, these hydrophilic organic substances cannot volatilize and accumulate on the paint film surface, forming defects such as whitening, rain streaks, and mottled appearance. This whitening, efflorescence, and mottled appearance of the paint film is a very troublesome issue, and the industry usually only requires re-application, significantly increasing the cost in terms of manpower, materials, and finances. Summary of the Invention

[0004] This invention provides a multifunctional repair agent for repairing rain streaks, water whitening, efflorescence, and discoloration in coatings, and its preparation method. This multifunctional repair agent, when applied to coatings with existing white streaks, efflorescence, and discoloration, requires only one coat to quickly eliminate these defects. It is simple to operate, highly efficient, and inexpensive, while also improving coating drying and film-forming efficiency. Furthermore, it exhibits good adhesion to the coating, resulting in a dense coating with good hydrophobic properties, weather resistance, and storage stability.

[0005] This invention is achieved through the following technical solution:

[0006] A multifunctional restorer for repairing rain streaks, water whitening, efflorescence, and discoloration in paint is composed of the following raw materials in parts by weight: 50-56 parts propylene glycol methyl ether, 3-10 parts film-forming aid, 1-3 parts hydroxyphenyl-benzotriazole, 27.2-44.7 parts deionized water, 0.5-2 parts amine free radical scavenger, 0.1-0.3 parts pH adjuster, 0.5-1 parts epoxy-modified organosilicon compound, and 0.2-0.5 parts bactericide.

[0007] Specifically, the film-forming aid is dodecyl alcohol ester. Dodecyl alcohol ester and propylene glycol methyl ether serve as solvents for the components.

[0008] Specifically, the mass ratio of propylene glycol methyl ether to 12-ethylhexyl alcohol ester is 9:1.

[0009] Specifically, the hydroxyphenyl-benzotriazole used is BASF's Thyrolene 1130. It is used as an anti-aging agent.

[0010] Specifically, the amine free radical scavenger used is BASF's Tianlerong 292.

[0011] The mass ratio of hydroxyphenyl-benzotriazole to amine free radical scavenger is 2:1.

[0012] Specifically, the epoxy-modified organosilicon compound is Hangzhou Jessica JSC-1180. This makes the coating of the present invention more repairable and dense, and provides a certain degree of hydrophobicity.

[0013] A method for preparing a multifunctional restorer for repairing rain streaks, water whitening, efflorescence, and discoloration in paint includes the following steps: adding propylene glycol methyl ether to a container, then adding a film-forming aid at a stirring speed of 300-500 rpm and stirring for 3-4 min; then adding hydroxyphenyl-benzotriazole and an amine free radical scavenger at a stirring speed of 400-600 rpm, and stirring for 3-5 min at a stirring speed of 500-700 rpm; then adding deionized water at a stirring speed of 300-500 rpm and stirring for 2-4 min; then adding a pH adjuster and an epoxy-modified organosilicon compound, and stirring for 4-6 min; finally adding a bactericide and stirring for 4-6 min to obtain the multifunctional restorer for repairing rain streaks, water whitening, efflorescence, and discoloration in paint.

[0014] The beneficial effects of this invention are:

[0015] This multi-functional repair agent can be used on coatings that have already developed white marks, efflorescence, or discoloration. It only requires one coat to quickly eliminate these issues. It is easy to use, has high construction efficiency, and is inexpensive. At the same time, it improves the drying efficiency and film formation efficiency of the coating. Furthermore, it has good adhesion to the coating, resulting in a dense coating with good hydrophobic properties, weather resistance, and good storage stability. Attached Figure Description

[0016] Figure 1 This is a photo of a section of a wall surface that has developed white marks, efflorescence, and discoloration after applying the repair agent from Example 1.

[0017] Figure 2 This is another photo of a wall that has already developed white marks, efflorescence, and discoloration.

[0018] Figure 3 Is Figure 2 The photo shows the wall surface that had already developed white marks, efflorescence, and discoloration after applying the repair agent from Example 2. Detailed Implementation

[0019] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below through specific embodiments.

[0020] Comparative Examples 1-9 used water, ethylene glycol, propylene glycol, propylene glycol methyl ether, benzyl alcohol, ethylene glycol butyl ether, propylene glycol ethyl ether, propylene glycol butyl ether, or ethylene glycol ester dodecyl as restoring agents, respectively, and applied them to the coatings that had already developed white marks, efflorescence, and discoloration. The dosage of the restoring agents in Comparative Examples 1-9 is shown in Table 1, and the performance test results are shown in Table 2.

[0021] Table 1. Dosage of each component of the restorative agent in Comparative Examples 1-9

[0022]

[0023]

[0024] Table 2 shows the test results of the restorative agents in Comparative Examples 1-9.

[0025] Experimental Project White marks dissolving state Dryness Coating appearance Coating hardness Comparative Example 1 Insoluble dry Difference normal Comparative Example 2 Slightly dissolve Not drying Difference normal Comparative Example 3 Slightly dissolve Not drying Difference normal Comparative Example 4 Dissolve dry normal Slightly worse Comparative Example 5 Dissolve Drying is slightly slower normal Slightly worse Comparative Example 6 Dissolve Drying is slightly slower normal Difference Comparative Example 7 Dissolve Slow drying normal Difference Comparative Example 8 Dissolve Slow drying normal Difference Comparative Example 9 Slightly soluble Drying is slightly slower Difference Normal and good

[0026] Comparative tests in Table 2 show that propylene glycol methyl ether (Comparative Example 4) exhibits high solubility for white marks, improved drying efficiency, better coating appearance, and higher hardness after treatment. The film-forming aid, alcohol ester twelve (Comparative Example 9), further enhances film formation. Therefore, the synergistic effect of propylene glycol methyl ether and the film-forming aid alcohol ester twelve can better address white mark blooming. Both coatings are slightly soft during drying, requiring dilution to improve initial strength.

[0027] Comparative Examples 10-21 used multiple components of water, ethylene glycol, propylene glycol, propylene glycol methyl ether, benzyl alcohol, ethylene glycol butyl ether, propylene glycol ethyl ether, propylene glycol butyl ether, or 12-ol ester as restoring agents, which were applied to the coating film that had already developed white marks, efflorescence, and discoloration. The dosage of each component of the restoring agent in Comparative Examples 10-21 is shown in Table 3, and the performance test results are shown in Table 4.

[0028] Table 3. Dosage of each component of the restorative agent in Comparative Examples 10-21

[0029]

[0030]

[0031] Table 4. Test results of the restorative agents in Comparative Examples 10-21

[0032]

[0033]

[0034] Through experimental testing and comparison (as shown in Table 4), by observing Comparative Examples 10, 11, 12, 13, 14, and 15, it was found that the amount of propylene glycol methyl ether used in Comparative Example 13 was 54 parts (54%). Comparative Example 13 achieved a suitable dosage in terms of comprehensive performance such as drying efficiency, coating appearance, and hardness after treatment. However, the coating appearance needs to be improved, and it is necessary to determine a suitable ratio between propylene glycol methyl ether and film-forming aids.

[0035] By observing Comparative Examples 15, 16, 17, 18, and 19, among which Comparative Example 18 (with the synergistic effect of 54% propylene glycol methyl ether and 6% film-forming aid) achieved the standard state in terms of comprehensive performance such as drying efficiency, coating appearance, and hardness after treatment. However, its coating appearance, aging resistance, adhesion, and water resistance need to be improved.

[0036] Table 5. Dosage of each component in the multifunctional restorative agent of Examples 1-4

[0037] Components Example 1 Example 2 Example 3 Example 4 Propylene glycol methyl ether 54 copies 50 copies 56 copies 54 copies Film-forming aid (alcohol ester dodecyl) 6 copies 3 copies 10 copies 6 copies Hydroxyphenyl-benzotriazole 1 copy 1 copy 3 copies 2 copies Amine free radical scavenger 0.5 copies 0.5 copies 2 copies 1 copy Deionized water 37.7 copies 44.7 copies 27.2 copies 35.8 copies pH adjuster (AMP-95) 0.1 copies 0.1 copies 0.3 copies 0.2 copies Epoxy-modified organosilicon compounds 0.5 copies 0.5 copies 1 copy 0.7 copies CMC (Chemical Modified Microorganisms) 0.2 copies 0.2 copies 0.5 copies 0.3 copies

[0038] The multifunctional restorer for repairing rain streaks, water whitening, efflorescence, and discoloration of paint in Example 1 was prepared by the following steps: propylene glycol methyl ether was added to a container, and then a film-forming aid was added and stirred for 4 minutes at a stirring speed of 300 rpm; then, hydroxyphenyl-benzotriazole and an amine free radical scavenger were added at a stirring speed of 400 rpm, and then stirred for 5 minutes at a stirring speed of 500 rpm; then, deionized water was added and stirred for 4 minutes at a stirring speed of 300 rpm; then, a pH adjuster and an epoxy-modified organosilicon compound were added and stirred for 4 minutes; finally, a bactericide was added and stirred for 4 minutes to obtain the multifunctional restorer for repairing rain streaks, water whitening, efflorescence, and discoloration of paint.

[0039] The multifunctional restorer for repairing rain streaks, water whitening, efflorescence, and discoloration in paint, as described in Example 2, is prepared by the following steps: propylene glycol methyl ether is added to a container, and then a film-forming aid is added and stirred for 3 minutes at a stirring speed of 500 rpm; next, hydroxyphenyl-benzotriazole and an amine free radical scavenger are added at a stirring speed of 600 rpm, and then stirred for 3 minutes at a stirring speed of 700 rpm; then, deionized water is added and stirred for 2 minutes at a stirring speed of 500 rpm; then, a pH adjuster and an epoxy-modified organosilicon compound are added and stirred for 6 minutes; finally, a bactericide is added and stirred for 6 minutes to obtain the multifunctional restorer for repairing rain streaks, water whitening, efflorescence, and discoloration in paint.

[0040] The multifunctional restorer for repairing rain streaks, water whitening, efflorescence, and discoloration of paint in Example 3 is prepared by the following steps: propylene glycol methyl ether is added to a container, and then a film-forming aid is added and stirred for 3.5 min at a stirring speed of 400 rpm; then, hydroxyphenyl-benzotriazole and an amine free radical scavenger are added at a stirring speed of 500 rpm, and then stirred for 4 min at a stirring speed of 600 rpm; then, deionized water is added and stirred for 3 min at a stirring speed of 400 rpm; then, a pH adjuster and an epoxy-modified organosilicon compound are added and stirred for 5 min; finally, a bactericide is added and stirred for 4-6 min to obtain the multifunctional restorer for repairing rain streaks, water whitening, efflorescence, and discoloration of paint.

[0041] The multifunctional restorer for repairing rain streaks, water whitening, efflorescence, and discoloration of paint in Example 4 is prepared by the following steps: propylene glycol methyl ether is added to a container, and then a film-forming aid is added and stirred for 3.5 min at a stirring speed of 400 rpm; then, hydroxyphenyl-benzotriazole and an amine free radical scavenger are added at a stirring speed of 500 rpm, and then stirred for 4 min at a stirring speed of 600 rpm; then, deionized water is added and stirred for 3 min at a stirring speed of 400 rpm; then, a pH adjuster and an epoxy-modified organosilicon compound are added and stirred for 5 min; finally, a bactericide is added and stirred for 4-6 min to obtain the multifunctional restorer for repairing rain streaks, water whitening, efflorescence, and discoloration of paint.

[0042] Table 6 Test results of the multifunctional restorative agents in Examples 1-4

[0043]

[0044]

[0045] in Figure 1 This is a photo of a section of a wall (located in Fengqiao Garden, Cangzhou) that had developed white marks, efflorescence, and discoloration after being partially coated with the repair agent of Example 1. Figure 2This is a photo of another wall that has already developed white marks, efflorescence, and discoloration (located in Century Garden, Cangzhou). Figure 3 Is Figure 2 The photo shows the wall surface that had already developed white marks, efflorescence, and discoloration after applying the repair agent from Example 2.

[0046] Further observation of Comparative Examples 18, 20, 21, and Example 1 revealed that, compared to Comparative Example 18, Example 1 additionally contained 0.5% epoxy-modified organosilicon compound, 1% hydroxyphenyl-benzotriazole, and 0.5% amine radical scavenger; compared to Comparative Example 20, Example 1 additionally contained hydroxyphenyl-benzotriazole; and compared to Comparative Example 21, Example 1 additionally contained amine radical scavenger. This invention not only exhibits good drying efficiency but also excellent adhesion to the coating film, resulting in a dense coating with good hydrophobic properties, weather resistance, and storage stability. The other examples, like Example 1, all demonstrate excellent overall performance. By observing the above comparative examples and embodiments, it can be seen that a reasonable ratio of propylene glycol methyl ether and film-forming aid 12-ol ester can quickly eliminate white marks, efflorescence, and blooming, while improving the drying efficiency and film-forming efficiency of the coating. By using epoxy-modified organosilicon compounds, the adhesion properties of the coating are improved, wet adhesion is enhanced, the coating becomes denser, the coating can be repaired, and it has a hydrophobic effect, thereby improving water resistance and having good storage stability. By using hydroxyphenyl-benzotriazole as a UV absorber in combination with an amine free radical scavenger, the occurrence of problems such as coating loss of gloss, cracking, discoloration, blistering, and peeling can be inhibited and delayed, thereby improving the weather resistance of the paint film.

[0047] Based on the test results of the above embodiments and comparative examples, it can be seen that the multifunctional restorer prepared by the present invention can repair paint rain marks, water whitening, efflorescence, and discoloration. When used on a coating film that has already developed white marks, efflorescence, and discoloration, only one coat is needed to quickly eliminate the white marks, efflorescence, and discoloration. It is simple to operate, has high construction efficiency, and low cost. At the same time, it improves the drying efficiency and film formation efficiency of the coating film. Moreover, it has good adhesion to the coating film, resulting in a dense coating with good hydrophobic effect, weather resistance, and good storage stability.

[0048] The above description is merely a preferred comparative example of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall be covered by the present invention.

Claims

1. A multifunctional restorer for repairing rain mark water white alkali bloom of a coating, characterized in that: The raw materials are composed of the following components in the following weight ratio: propylene glycol methyl ether 50-56 parts, film forming aid 3-10 parts, hydroxyphenyl-benzotriazole 1-3 parts, hindered amine radical scavenger 0.5-2 parts, deionized water 27.2-44.7 parts, pH adjuster 0.1-0.3 parts, epoxy modified organosilicon compound 0.5-1 part, and fungicide 0.2-0.5 part, wherein the film forming aid is alcohol ester twelve. ​ 2. The multifunctional restorer for repairing rain mark water white and efflorescence of the repair coating according to claim 1, characterized in that: The mass ratio of propylene glycol methyl ether and alcohol ester twelve is 9:

1.

3. The multifunctional restorer for repairing rain mark water white and efflorescence of the repair coating according to claim 1, characterized in that: The hydroxyphenyl-benzotriazole used is Basf Tego 1130.

4. The multifunctional restorer for repairing rain mark water white and efflorescence of the repair coating according to claim 1, characterized in that: The hindered amine radical scavenger used is Basf Tego 292.

5. The multifunctional restorer for repairing rain mark water white and efflorescence of the repair coating according to claim 1, characterized in that: The mass ratio of the hydroxyphenyl-benzotriazole and the hindered amine radical scavenger is 2:

1.

6. The multifunctional restorer for repairing rain mark water white and efflorescence of the repair coating according to claim 1, characterized in that: The epoxy modified organosilicon compound is Hangzhou Jessica JSC-1180.

7. The method for preparing a multifunctional restorer for repairing rain mark water whitening and efflorescence of a repair coating according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: adding propylene glycol methyl ether into a container, then adding film forming aid and stirring for 3-4 min at a stirring rate of 300-500 rpm; then adding hydroxyphenyl-benzotriazole and hindered amine radical scavenger and stirring for 3-5 min at a stirring rate of 400-600 rpm; then adding deionized water and stirring for 2-4 min at a stirring rate of 300-500 rpm; then adding pH adjuster, epoxy modified organosilicon compound, and stirring for 4-6 min; finally adding fungicide and stirring for 4-6 min, thus obtaining the multifunctional restorer for repairing water white alkali bloom and rain marks of the coating. The mass ratio of propylene glycol methyl ether and alcohol ester twelve is 9:

1. The hydroxyphenyl-benzotriazole used is Basf Tego 1130. The hindered amine radical scavenger used is Basf Tego 292. The mass ratio of the hydroxyphenyl-benzotriazole and the hindered amine radical scavenger is 2:

1. The epoxy modified organosilicon compound is Hangzhou Jessica JSC-1180. The method comprises the following steps: adding propylene glycol methyl ether into a container, then adding film forming aid and stirring for 3-4 min at a stirring rate of 300-500 rpm; then adding hydroxyphenyl-benzotriazole and hindered amine radical scavenger and stirring for 3-5 min at a stirring rate of 400-600 rpm; then adding deionized water and stirring for 2-4 min at a stirring rate of 300-500 rpm; then adding pH adjuster, epoxy modified organosilicon compound, and stirring for 4-6 min; finally adding fungicide and stirring for 4-6 min, thus obtaining the multifunctional restorer for repairing water white alkali bloom and rain marks of the coating.

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