Quick-setting rainproof exterior wall latex paint and preparation method thereof

Abstract

The invention provides quick-setting rainproof exterior wall latex paint and a preparation method thereof. The quick-setting rainproof exterior wall latex paint comprises the following raw materials: a latex paint component and a quick-setting additive, and the weight ratio of the latex paint component to the quick-setting additive is 10: (2-4); the latex paint is prepared from the following materials in parts by weight: 150 to 200 parts of waterproof copolymerized emulsion, 20 to 30 parts of rutile titanium dioxide, 15 to 25 parts of talcum powder, 10 to 15 parts of mica powder, 5 to 7 parts of wollastonite, 15 to 25 parts of first quick-setting solvent, 25 to 30 parts of second quick-setting solvent and 20 to 30 parts of water. A paint film formed by the quick-setting rainproof exterior wall latex paint provided by the invention has relatively good quick-setting performance and waterproof performance.

Description

Technical Field

[0001] The invention relates to the technical field of latex paint, in particular to a quick-setting rainproof exterior wall latex paint and a preparation method thereof. Background Art

[0002] Exterior latex paint is a latex paint specially designed for the decoration and protection of the exterior walls of buildings. It has good brushability and covering power, and can form a tough and durable paint film, which plays a good protective and decorative role on the exterior walls of buildings.

[0003] Exterior latex paint needs a certain amount of time to dry and solidify after construction in order to form a tough and durable paint film. Traditional exterior latex paints currently on the market do not have the function of quick-setting and rainproofing. After construction, it is necessary to wait for a period of time to ensure that the coating is completely dry and solidified before it can withstand the erosion of rain. In this process, if it encounters rain erosion, the latex paint will be diluted and washed away, thereby affecting the adhesion and overall effect of the coating, resulting in a decrease in the performance of the latex paint. Therefore, there is an urgent need for an exterior latex paint with quick-setting and rainproofing functions. Summary of the invention

[0004] The invention provides a quick-setting rainproof exterior wall latex paint and a preparation method thereof. The paint film formed by the quick-setting rainproof exterior wall latex paint has good quick-setting performance and waterproof performance.

[0005] According to one aspect of the present invention, a quick-setting rainproof exterior wall latex paint is provided, wherein the raw materials thereof include the following materials: a latex paint component and a quick-setting additive, wherein the weight ratio of the latex paint component to the quick-setting additive is 10:(2-4); and the materials used to prepare the latex paint include, by weight, 150-200 parts of a waterproof copolymer emulsion, 20-30 parts of rutile titanium dioxide, 15-25 parts of talc, 10-15 parts of mica powder, 5-7 parts of wollastonite, 15-25 parts of a first quick-setting solvent, 25-30 parts of a second quick-setting solvent, and 20-30 parts of water.

[0006] Preferably, calculated by weight, the materials used to prepare the quick-setting additive include: 20 to 30 parts of film-forming aid, 20 to 50 parts of the first quick-setting solvent, 10 to 20 parts of the second quick-setting solvent, 25 to 30 parts of water, 12 to 17 parts of reinforcing agent, 5 to 7 parts of silicate waterproofing agent, 5 to 10 parts of leveling agent, and 7 to 9 parts of matting agent.

[0007] Preferably, the waterproof copolymer emulsion is copolymerized by acrylic acid, silicone and styrene, and the weight ratio of acrylic acid, silicone and styrene is 5:7:(2-4).

[0008] Preferably, the first quick-setting solvent is prepared from xylene, acetone and ethanol, and the weight ratio of xylene, acetone and ethanol is (2-4): (1-3): (3-5).

[0009] Preferably, the second quick-setting solvent is prepared from ethylene glycol and propylene glycol, and the weight ratio of ethylene glycol to propylene glycol is (2-4):(6-8).

[0010] Preferably, the film-forming aid is copolymerized from dodecyl alcohol ester and dipropylene glycol oxyacetate, and the weight ratio of dodecyl alcohol ester to dipropylene glycol oxyacetate is (1-10):3.

[0011] Preferably, the reinforcing agent is prepared from latex powder and nano-silicon dioxide, and the weight ratio of the latex powder to the nano-silicon dioxide is (0.5-1.5): (2-4).

[0012] According to another aspect of the present invention, there is provided a method for preparing a quick-setting rainproof exterior wall latex paint, comprising the following steps:

[0013] S1. The first quick-setting solvent and the second quick-setting solvent were mixed and stirred at room temperature for 90 min, and then a waterproof copolymer emulsion, rutile titanium dioxide, talc, mica powder and wollastonite were emulsified to obtain a latex paint;

[0014] S2. The first quick-setting solvent and the second quick-setting solvent were mixed and stirred at room temperature for 90 min, and then a film-forming agent, a reinforcing agent, a silicate waterproofing agent, a leveling agent and a matting agent were added to obtain a quick-setting additive;

[0015] S3. Add latex paint and quick-setting additive into a vacuum reactor, mix, and let stand to obtain quick-setting rainproof exterior wall latex paint.

[0016] Preferably, in step S1, the emulsification temperature is 20-25° C., and the emulsification time is 3-5 h.

[0017] Preferably, the standing time in step S3 is 20 to 28 hours.

[0018] The beneficial effects of the present invention are as follows: the waterproof performance of latex paint can be improved by adding a waterproof copolymer emulsion and an enhancer; the drying process of latex paint can be accelerated by adding a first quick-setting solvent, a second quick-setting solvent and a film-forming aid, thereby improving the solidification speed of latex paint; the addition of the above materials can effectively improve the quick-setting performance and waterproof performance of the paint film formed by the latex paint, so as to effectively avoid the performance degradation of the latex paint due to rain during the coating and drying process. DETAILED DESCRIPTION

[0019] 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.

[0020] Example 1

[0021] The present embodiment provides a quick-setting rainproof exterior wall latex paint, and the preparation method thereof comprises the following steps:

[0022] S1. 15 parts by weight of a first quick-setting solvent and 25 parts by weight of a second quick-setting solvent were mixed and stirred at room temperature for 90 min, and then 150 parts by weight of a waterproof copolymer emulsion, 20 parts by weight of rutile titanium dioxide, 15 parts by weight of talc, 10 parts by weight of mica powder and 5 parts by weight of wollastonite were emulsified to obtain a latex paint;

[0023] S2. 20 parts by weight of a first quick-setting solvent and 10 parts by weight of a second quick-setting solvent were mixed and stirred at room temperature for 90 min, and then 20 parts by weight of a film-forming agent, 12 parts by weight of a reinforcing agent, 5 parts by weight of a silicate waterproofing agent, 5 parts by weight of a leveling agent and 7 parts by weight of a matting agent were added to obtain a quick-setting additive;

[0024] S3. Add latex paint and quick-setting additive into a vacuum reactor, mix, and let stand to obtain quick-setting rainproof exterior wall latex paint.

[0025] Among them, the weight ratio of latex paint components and quick-setting additives is 10:2;

[0026] The waterproof copolymer emulsion is copolymerized by acrylic acid, silicone and styrene, and the weight ratio of acrylic acid, silicone and styrene is 5:7:2;

[0027] The first quick-setting solvent is prepared from xylene, acetone and ethanol, and the weight ratio of xylene, acetone and ethanol is 2:1:3;

[0028] The second quick-setting solvent is prepared from ethylene glycol and propylene glycol, and the weight ratio of ethylene glycol to propylene glycol is 2:6;

[0029] The film-forming aid is copolymerized with dodecyl alcohol ester and dipropylene glycol oxyacetate, and the weight ratio of dodecyl alcohol ester to dipropylene glycol oxyacetate is 1:3.

[0030] The reinforcing agent is prepared from latex powder and nano-silicon dioxide, and the weight ratio of the latex powder to the nano-silicon dioxide is 0.5:2.

[0031] Example 2

[0032] The present embodiment provides a quick-setting rainproof exterior wall latex paint, and the preparation method thereof comprises the following steps:

[0033] S1. 20 parts by weight of a first quick-setting solvent and 27 parts by weight of a second quick-setting solvent were mixed and stirred at room temperature for 90 min, and then 175 parts by weight of a waterproof copolymer emulsion, 25 parts by weight of rutile titanium dioxide, 20 parts by weight of talc, 12 parts by weight of mica powder and 6 parts by weight of wollastonite were emulsified to obtain a latex paint;

[0034] S2. 35 parts by weight of a first quick-setting solvent and 15 parts by weight of a second quick-setting solvent were mixed and stirred at room temperature for 90 min, and then 25 parts by weight of a film-forming agent, 15 parts by weight of a reinforcing agent, 6 parts by weight of a silicate waterproofing agent, 7 parts by weight of a leveling agent and 8 parts by weight of a matting agent were added to obtain a quick-setting additive;

[0035] S3. Add latex paint and quick-setting additive into a vacuum reactor, mix, and let stand to obtain quick-setting rainproof exterior wall latex paint.

[0036] Among them, the weight ratio of latex paint components and quick-setting additives is 10:3;

[0037] The waterproof copolymer emulsion is copolymerized by acrylic acid, silicone and styrene, and the weight ratio of acrylic acid, silicone and styrene is 5:7:3;

[0038] The first quick-setting solvent is prepared from xylene, acetone and ethanol, and the weight ratio of xylene, acetone and ethanol is 3:2:4;

[0039] The second quick-setting solvent is prepared from ethylene glycol and propylene glycol, and the weight ratio of ethylene glycol to propylene glycol is 3:7;

[0040] The film-forming aid is copolymerized with dodecyl alcohol ester and dipropylene glycol oxyacetate, and the weight ratio of dodecyl alcohol ester to dipropylene glycol oxyacetate is 6:3.

[0041] The reinforcing agent is prepared from latex powder and nano-silicon dioxide, and the weight ratio of the latex powder to the nano-silicon dioxide is 1:3.

[0042] Example 3

[0043] The present embodiment provides a quick-setting rainproof exterior wall latex paint, and the preparation method thereof comprises the following steps:

[0044] S1. 25 parts by weight of a first quick-setting solvent and 30 parts by weight of a second quick-setting solvent were mixed and stirred at room temperature for 90 min, and then 200 parts by weight of a waterproof copolymer emulsion, 30 parts by weight of rutile titanium dioxide, 25 parts by weight of talc, 15 parts by weight of mica powder and 7 parts by weight of wollastonite were emulsified to obtain a latex paint;

[0045] S2. 50 parts by weight of a first quick-setting solvent and 20 parts by weight of a second quick-setting solvent were mixed and stirred at room temperature for 90 min, and then 30 parts by weight of a film-forming agent, 17 parts by weight of a reinforcing agent, 7 parts by weight of a silicate waterproofing agent, 10 parts by weight of a leveling agent and 9 parts by weight of a matting agent were added to obtain a quick-setting additive;

[0046] S3. Add latex paint and quick-setting additive into a vacuum reactor, mix, and let stand to obtain quick-setting rainproof exterior wall latex paint.

[0047] Among them, the weight ratio of latex paint components and quick-setting additives is 10:4;

[0048] The waterproof copolymer emulsion is copolymerized by acrylic acid, silicone and styrene, and the weight ratio of acrylic acid, silicone and styrene is 5:7:4;

[0049] The first quick-setting solvent is prepared from xylene, acetone and ethanol, and the weight ratio of xylene, acetone and ethanol is 4:3:5;

[0050] The second quick-setting solvent is prepared from ethylene glycol and propylene glycol, and the weight ratio of ethylene glycol to propylene glycol is 4:8;

[0051] The film-forming aid is copolymerized with dodecyl alcohol ester and dipropylene glycol oxyacetate, and the weight ratio of dodecyl alcohol ester to dipropylene glycol oxyacetate is 10:3.

[0052] The reinforcing agent is prepared from latex powder and nano-silicon dioxide, and the weight ratio of the latex powder to the nano-silicon dioxide is 1.5:4.

[0053] Example 4

[0054] This embodiment provides a quick-setting rainproof exterior wall latex paint. Compared with the embodiment 1, the difference in composition is that the raw materials of the waterproof copolymer emulsion are prepared from acrylic acid and silicone, and the weight ratio of acrylic acid to silicone is 5:7. 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.

[0055] Example 5

[0056] This embodiment provides a quick-setting rainproof exterior wall latex paint. Compared with the embodiment 1, the difference in structure is that the first quick-setting solvent is prepared from xylene and acetone, and the weight ratio of xylene to acetone is 2: 1. Except for the above difference, the materials, formula ratio and preparation operation used in this embodiment are strictly consistent with those in the embodiment 1.

[0057] Example 6

[0058] This embodiment provides a quick-setting rainproof exterior wall latex paint, and compared with the embodiment 1, the difference in structure is that the second quick-setting solvent is prepared from ethylene glycol only. Except for the above difference, the materials, formula ratio and preparation operation used in this embodiment are strictly consistent with those in the embodiment 1.

[0059] Example 7

[0060] This embodiment provides a quick-setting rainproof exterior wall latex paint, which is different from that of embodiment 1 in that the film-forming aid is prepared from dodecanol ester only. Except for the above differences, the materials, formula ratios and preparation operations used in this embodiment are strictly consistent with those in embodiment 1.

[0061] Example 8

[0062] This embodiment provides a quick-setting rainproof exterior wall latex paint, which is different from the embodiment 1 in that the reinforcing agent is prepared from latex powder only. 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.

[0063] Comparative Example 1

[0064] This comparative example provides a common exterior wall latex paint.

[0065] Test Case

[0066] 1. Test subjects

[0067] In this test example, the quick-setting rainproof exterior wall latex paint provided in Examples 1 to 8 and the common exterior wall latex paint on the market provided in Comparative Example 1 were used as test objects to conduct relevant performance tests.

[0068] 2. Test content

[0069] The exterior wall facade is used as the coating surface and the experiment is carried out outdoors. The outdoor experimental environment should keep the coating surface ventilated, and the coatings should be separated by 1.2 to 1.5 meters. The latex paint surface should be washed with water 12 hours and 24 hours after the start of the experiment.

[0070] 3. Test results

[0071] Table 1 Test results of relevant properties of quick-setting rainproof exterior wall latex paint

[0072]

[0073]

[0074] The relevant performance test results of the quick-setting rainproof exterior wall latex paints provided in Examples 1 to 8 and the common exterior wall latex paint on the market provided in Comparative Example 1 are shown in Table 1.

[0075] The drying time of Examples 1 to 3 is relatively short, ranging from 15.2 to 16.3 hours, which indicates that the quick-setting solvents and additives in these formulations effectively accelerate the drying process of the coating. The drying time of Examples 4 to 8 is slightly longer, ranging from 17.2 to 18.1 hours, which may be related to the changes in certain components in these examples (such as the composition of the waterproof copolymer emulsion, the ratio of the quick-setting solvent, etc.). The drying time of Comparative Example 1 is the longest, which is 22.1 hours, indicating that it does not contain quick-setting components or the quick-setting effect is poor.

[0076] After the first rinse, the latex paints of all examples showed good resistance to blistering and paint peeling, indicating that they all had good initial water resistance. After the second rinse, the latex paints of Examples 1 to 3 still maintained no obvious blistering and paint peeling, showing excellent water resistance and durability. Examples 4 to 8 had a small amount of blistering and paint peeling after the second rinse. Comparative Example 1 had a large amount of blistering and paint peeling after the second rinse, indicating that its water resistance was poor.

[0077] The paint surfaces of Examples 1 to 3 are smooth and flat, indicating that these formulations not only have good drying and anti-washing properties, but also can maintain the beauty and integrity of the paint surface. The paint surfaces of Examples 4 to 8 are partially delaminated and slightly whitened. The paint surface of Comparative Example 1 is partially delaminated and obviously whitened, indicating that its comprehensive performance is poor.

[0078] In the present invention, the waterproof performance of the latex paint can be improved by adding a waterproof copolymer emulsion and an enhancer, and the drying process of the latex paint can be accelerated by adding a first quick-setting solvent, a second quick-setting solvent and a film-forming aid, thereby improving the solidification speed of the latex paint. The addition of the above materials can effectively improve the quick-setting performance and waterproof performance of the paint film formed by the latex paint, so as to effectively avoid the performance degradation of the latex paint due to rain during the coating and drying process.

[0079] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the technical solutions of the present invention can be modified or equivalently replaced, but these modifications or replacements are all within the protection scope of the present invention.

Claims

1. A quick-setting rainproof exterior wall latex paint, characterized in that: Its raw materials The invention comprises the following materials: latex paint component and quick-setting additive, wherein the weight ratio of the latex paint component to the quick-setting additive is 10:(2-4); Calculated by weight, the materials used to prepare the latex paint include: 150-200 parts of waterproof copolymer emulsion, 20-30 parts of rutile titanium dioxide, 15-25 parts of talc, 10-15 parts of mica powder, 5-7 parts of wollastonite, 15-25 parts of a first quick-setting solvent, 25-30 parts of a second quick-setting solvent, and 20-30 parts of water.

2. The quick-setting rainproof exterior wall latex paint according to claim 1, characterized in that: Calculated by weight, the materials used to prepare the quick-setting additive include: 20 to 30 parts of film-forming aid, 20 to 50 parts of a first quick-setting solvent, 10 to 20 parts of a second quick-setting solvent, 25 to 30 parts of water, 12 to 17 parts of a reinforcing agent, 5 to 7 parts of a silicate waterproofing agent, 5 to 10 parts of a leveling agent, and 7 to 9 parts of a matting agent.

3. The quick-setting rainproof exterior wall latex paint according to claim 1, characterized in that: The waterproof copolymer emulsion is copolymerized by acrylic acid, organic silicon and styrene, and the weight ratio of the acrylic acid, the organic silicon and the styrene is 5:7:(2-4).

4. The quick-setting rainproof exterior wall latex paint according to claim 1 or 2, characterized in that: The first quick-setting solvent is prepared from xylene, acetone and ethanol, and the weight ratio of the xylene, the acetone and the ethanol is (2-4): (1-3): (3-5).

5. The quick-setting rainproof exterior wall latex paint according to claim 1 or 2, characterized in that: The second quick-setting solvent is prepared from ethylene glycol and propylene glycol, and the weight ratio of the ethylene glycol to the propylene glycol is (2-4):(6-8).

6. The quick-setting rainproof exterior wall latex paint as claimed in claim 2, characterized in that: The film-forming aid is copolymerized by dodecyl alcohol ester and dipropylene glycol oxyacetate, and the weight ratio of the dodecyl alcohol ester to the dipropylene glycol oxyacetate is (1-10):

3.

7. The quick-setting rainproof exterior wall latex paint as claimed in claim 2, characterized in that: The reinforcing agent is prepared from latex powder and nano silicon dioxide, and the weight ratio of the latex powder to the nano silicon dioxide is (0.5-1.5): (2-4).

8. A method for preparing the quick-setting rainproof exterior wall latex paint according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. The first quick-setting solvent and the second quick-setting solvent are mixed, stirred at room temperature for 90 min, and then the waterproof copolymer emulsion, the rutile titanium dioxide, the talc, the mica powder and the wollastonite are added for emulsification to obtain a latex paint; S2. The first quick-setting solvent and the second quick-setting solvent are mixed, stirred at room temperature for 90 min, and then the film-forming agent, the reinforcing agent, the silicate waterproofing agent, the leveling agent and the matting agent are added to obtain a quick-setting additive; S3. Add the latex paint and the quick-setting additive into a vacuum reactor, mix them, and let them stand to obtain a quick-setting rainproof exterior wall latex paint.

9. The preparation method according to claim 8, characterized in that: The emulsification temperature in step S1 is 20-25° C., and the emulsification time is 3-5 hours.

10. The preparation method according to claim 8, characterized in that: The standing time in step S3 is 20 to 28 hours.

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