Composition for waterproofing paint, waterproofing paint, and method for producing the same

Abstract

The present application relates to the field of waterproof coating, disclose a waterproof coating composition, waterproof coating and its preparation method, the composition contains main agent and adjuvant, the main agent includes SBS modified emulsified asphalt, acrylic emulsion and first component, the total weight of the composition is taken as the basis, the content of SBS emulsified asphalt is 30wt%-40wt%, the content of acrylic emulsion is 20wt%-25wt%, the content of first component is 35wt%-45wt%, the first component contains semi-hydrated gypsum and component A with mass ratio of 1:0.5-2, the component A is heavy calcium and / or barium sulfate, the waterproof coating prepared by the waterproof coating composition provided by the present application has short drying time, which can significantly improve the construction efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of waterproof coating, in particular to a waterproof coating composition, a waterproof coating and a preparation method thereof. BACKGROUND

[0002] To meet the growing demand for housing and engineering needs, modern buildings often have high number of stories, deep foundation pit features, there are various basement, parking lot, traffic hub structure layer, dozens of meters high side wall and wall can be seen everywhere.

[0003] And such side wall and groundwater layer is directly in contact with the key part of waterproof, but due to the narrow side wall of the underground part, the height is high, and the construction of the coil is difficult, it is very difficult to achieve good waterproof effect.

[0004] The conventional wall and side wall waterproof generally uses coil and coating, and the coating is mostly water-based asphalt waterproof coating. The progress of the water-based asphalt waterproof coating construction depends on the drying time after the water-based asphalt waterproof coating construction and the thickness of the dry film formed after one construction.

[0005] The water-based asphalt waterproof coating on the market has a long drying time, and can only be constructed once a day, and the thickness of one pass is only 0.4 mm. In order to meet the standard requirement (1.5 mm), at least 3-4 times of construction is required, and the water-based asphalt coating construction period is as long as 4 days, which seriously affects the progress of construction. SUMMARY

[0006] The purpose of the present application is to develop a waterproof coating with strong adhesion, good elongation and short drying time.

[0007] In order to achieve the above purpose, the first aspect of the present application provides a waterproof coating composition, which contains a main agent and an auxiliary agent, wherein the main agent comprises SBS modified emulsified asphalt, acrylic emulsion and a first component;

[0008] The content of the SBS emulsified asphalt is 30wt%-40wt%, the content of the acrylic emulsion is 20wt%-25wt%, and the content of the first component is 35wt%-45wt%, based on the total weight of the composition;

[0009] The first component contains semi-hydrated gypsum and component A in a mass ratio of 1:0.5-2.

[0010] The component A is heavy calcium and / or barium sulfate.

[0011] The second aspect of the present application provides a method for preparing a waterproof coating, which uses the components in the composition of the first aspect described above, comprising:

[0012] The components in the main agent and the components in the auxiliary agent are mixed to obtain the waterproof coating.

[0013] The third aspect of the present application provides a waterproof coating prepared by the method of the second aspect.

[0014] Compared with the prior art, the present application has the following advantages:

[0015] The waterproof coating provided by the present application has strong adhesion, good water resistance, good extensibility, and short drying time after construction.

[0016] The method for preparing the waterproof coating provided by the present application is simple, easy to operate, and suitable for large-scale production. DETAILED DESCRIPTION

[0017] The endpoints of the ranges and any values disclosed herein are not limited to the precise values stated. The endpoints of the ranges and any values should be interpreted as approximately between the stated values and include values near the stated values. For values which are less than one, one part in 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 can be implied. These are only examples of what is specifically asserted to be the range. It is explicitly stated that any mentioned range includes any and all received endpoints.

[0018] It should be noted that the average particle size in the present application refers to the particle size corresponding to the cumulative particle size distribution fraction of 50% of the powder sample of component A when tested by a nanoparticle size analyzer.

[0019] As described above, the first aspect of the present application provides a waterproof coating composition, which contains a main agent and an auxiliary agent, wherein the main agent contains SBS modified emulsified asphalt, acrylic emulsion and a first component.

[0020] The content of the SBS emulsified asphalt is 30wt%-40wt%, the content of the acrylic emulsion is 20wt%-25wt%, and the content of the first component is 35wt%-45wt%, based on the total weight of the composition.

[0021] The first component contains semi-hydrated gypsum and component A in a mass ratio of 1:0.5-2.

[0022] The component A is heavy calcium carbonate and / or barium sulfate.

[0023] Preferably, the component A is barium sulfate.

[0024] Preferably, the average particle size of the component A is 15-30μm.

[0025] Preferably, the SBS modified emulsified asphalt has a softening point ≥ 70℃, an evaporation residue ductility ≥ 100 cm, and an evaporation residue ductility at -10℃ ≥ 15 cm. The inventors of the present application have found that in this preferred case, the waterproof coating prepared using the waterproof coating composition has stronger adhesion and better extensibility.

[0026] Preferably, the acrylic emulsion has an elongation ≥ 1500% and a bonding strength ≥ 0.8 MPa. The inventors of the present application have found that in this preferred case, the waterproof coating prepared using the waterproof coating composition has stronger adhesion and better extensibility.

[0027] Preferably, the auxiliary agent includes a thickening agent, an antifoaming agent, a pH adjusting agent, and a dispersing agent.

[0028] The content of the thickening agent is 0.3wt%-1.0wt% based on the total weight of the composition, the content of the antifoaming agent is 0.5wt%-1.0wt%, the content of the pH adjusting agent is 0.1wt%-0.3wt%, and the content of the dispersing agent is 1.0wt%-2.0wt%.

[0029] Preferably, the antifoaming agent is an organic silicon-based antifoaming agent.

[0030] Preferably, the pH adjusting agent is selected from at least one of aqueous ammonia, aqueous monomethylamine, and aqueous dimethylamine.

[0031] As described above, the second aspect of the present application provides a method for preparing a waterproof coating, which is performed using the components in the composition of the first aspect described above, and includes:

[0032] The components in the main agent and the components in the auxiliary agent are mixed to obtain the waterproof coating.

[0033] According to a preferred embodiment, the step of mixing the components in the main agent and the components in the auxiliary agent includes:

[0034] (1) first stirring and mixing the acrylic emulsion, the thickening agent, the pH adjusting agent, and the dispersing agent to obtain an intermediate I;

[0035] (2) second stirring and mixing the intermediate I and the first component to obtain an intermediate II;

[0036] (3) contact mixing the intermediate II, the antifoaming agent, and the SBS modified emulsified asphalt to obtain the waterproof coating.

[0037] According to another preferred embodiment, in step (1), the acrylic emulsion, thickening agent and pH regulator are first stirred uniformly, and then mixed with the dispersant by the first stirring.

[0038] Preferably, the rotating speed of the first stirring is lower than that of the second stirring.

[0039] Preferably, in step (1), the first stirring is performed at a rotating speed of 200-400 rpm for 5-20 min.

[0040] Preferably, in step (2), the second stirring is performed at a rotating speed of 700-800 rpm for 0.5-1.5 h.

[0041] In order to obtain waterproof coating with better uniformity, according to one preferred embodiment, the contact mixing comprises:

[0042] The intermediate II and part of the defoaming agent are first mixed by the first contact mixing, and then the first contact mixing product, the SBS modified emulsified asphalt and the remaining defoaming agent are mixed by the second contact mixing to obtain the waterproof coating.

[0043] It should be noted that, in the present application, the amount of the part of the defoaming agent accounts for 45wt%-55wt% of the total amount of the defoaming agent, and the amount of the remaining defoaming agent accounts for 45wt%-55wt% of the total amount of the defoaming agent, and the sum of the amount of the part of the defoaming agent and the amount of the remaining defoaming agent is equal to the total amount of the defoaming agent in the first aspect.

[0044] Preferably, the conditions of the first contact mixing and the second contact mixing are each independently as follows: rotating speed of 800-1000 rpm, and time of 5-10 min.

[0045] Preferably, the method further comprises: performing vacuum defoaming treatment on the second contact mixing product to obtain the waterproof coating.

[0046] Preferably, the conditions of the vacuum defoaming treatment are as follows: rotating speed of 800-1200 rpm, time of 1-3 min, and pressure of -0.010 MPa to -0.10 MPa.

[0047] As described above, the third aspect of the present application provides the waterproof coating prepared by the method of the second aspect.

[0048] The present application will be described in detail below by way of examples. In the following examples, various instruments and raw materials used are commercially available unless otherwise specified.

[0049] SBS modified emulsified asphalt:

[0050] SBS modified emulsified asphalt I: softening point of 75℃, evaporation residue ductility of 120cm, evaporation residue low temperature ductility of 15cm at -10℃, purchased from Shandong Highway Asphalt Co., Ltd., brand FST60.

[0051] SBS modified emulsified asphalt II: softening point of 51℃, evaporation residue ductility of 83cm, evaporation residue low temperature ductility of 7cm at -10℃, purchased from Shandong Dao Shi Highway Technology Co., Ltd., brand DS-60% modified.

[0052] Common emulsified asphalt: purchased from Foshan Zhongyou Gaofu Petroleum Co., Ltd., brand CYC-27.

[0053] Acrylic emulsion:

[0054] Acrylic emulsion I: elongation ≥1500%, bonding strength ≥0.8MPa, purchased from Dongying Jinyoulai Trade Co., Ltd., brand GT-167.

[0055] Acrylic emulsion II: elongation of 1200%, bonding strength of 0.5MPa, purchased from Badefu Group Co., Ltd., brand RS-998A.

[0056] First component:

[0057] First component I-1: hemihydrate gypsum and barium sulfate (15μm) with a mass ratio of 1:1.35.

[0058] First component I-2: hemihydrate gypsum and heavy calcium (15μm) with a mass ratio of 1:1.35.

[0059] First component DI-1: anhydrous gypsum and barium sulfate (15μm) with a mass ratio of 1:1.35.

[0060] First component DI-2: dihydrate gypsum and barium sulfate (15μm) with a mass ratio of 1:1.35.

[0061] First component DI-3: hemihydrate gypsum and barium sulfate (15μm) with a mass ratio of 1:2.5.

[0062] Thickening agent: purchased from Wanhua Chemical Group Co., Ltd., brand A406.

[0063] Defoaming agent: silicone defoaming agent, purchased from Foshan Youqian New Material Co., Ltd., brand U-536.

[0064] pH regulator: 28wt% ammonia water.

[0065] Dispersant: STA-1618, purchased from Nancheng Santuo Chemical Industry Co., Ltd.

[0066] Example 1

[0067] This example is used to illustrate the preparation of a waterproof coating according to the method of the following steps with reference to the formulation in Table 1:

[0068] (1) First, the acrylic emulsion, thickening agent and pH regulator are stirred uniformly, then the first stirring mixing with the dispersant is carried out to obtain intermediate I;

[0069] (2) The second stirring mixing of the intermediate I and the first component is carried out to obtain intermediate II;

[0070] (3) First, the first contact mixing of the intermediate II and part of the defoaming agent is carried out, then the second contact mixing of the first contact mixed material, the SBS modified emulsified asphalt and the remaining part of the defoaming agent is carried out, and then the vacuum defoaming treatment is carried out to obtain the waterproof coating;

[0071] First stirring mixing: rotation speed is 300 rpm, time is 5 min;

[0072] Second stirring mixing: rotation speed is 750 rpm, time is 0.5 h;

[0073] First contact mixing: rotation speed is 1000 rpm, time is 5 min;

[0074] First contact mixing: rotation speed is 1000 rpm, time is 5 min;

[0075] Vacuum defoaming treatment: rotation speed is 1000 rpm, time is 2 min, pressure is -0.095 MPa.

[0076] In the absence of special instructions, examples 2-4, comparative examples 1 and 2 are carried out by the similar method as the example, except that the formulations are different, see Table 1 for details.

[0077] Comparative Example 3

[0078] This comparative example is carried out by the similar method as example 1, except that this comparative example uses ordinary emulsified asphalt of equal mass to replace the SBS modified emulsified asphalt in example 1, and the rest is the same as example 1, to prepare a waterproof coating.

[0079] Comparative Example 4

[0080] The comparative example was prepared by using the similar method of Example 1, except that the comparative example used equal mass of the first component DI-1 to replace the first component I-1 in Example 1, and the rest was the same as Example 1, to prepare a waterproof coating.

[0081] The waterproof coating prepared in the comparative example had particles precipitated from the appearance, and no subsequent performance test was performed.

[0082] Comparative Example 5

[0083] The comparative example was prepared by using the similar method of Example 1, except that the comparative example used equal mass of the first component DI-2 to replace the first component I-1 in Example 1, and the rest was the same as Example 1, to prepare a waterproof coating.

[0084] Comparative Example 6

[0085] The comparative example was prepared by using the similar method of Example 1, except that the comparative example used equal mass of the first component DI-3 to replace the first component I-1 in Example 1, and the rest was the same as Example 1, to prepare a waterproof coating.

[0086] Table 1

[0087]

[0088]

[0089] Test Example

[0090] The performance of the waterproof coatings prepared in Examples 1-4, Comparative Examples 1-3, Comparative Example 5 and Comparative Example 6 was tested, as follows:

[0091] (1) The viscosity of the waterproof coating at 23±2℃ was tested according to the test method in the standard JC / T 408-2005;

[0092] (2) The solid content of the waterproof coating was tested according to the test method in the standard JC / T 408-2005;

[0093] (3) The low temperature flexibility of the waterproof coating was tested according to the test method in the standard JC / T 408-2005;

[0094] (4) The adhesion strength of the waterproof coating was tested according to the test method in the standard JC / T 408-2005;

[0095] (5) The peel strength of the waterproof coating and SBS membrane was tested according to the test method in the standard Q / SDKS 091-2024;

[0096] (6) The elongation at break of the waterproof coating is tested according to the test method in the standard of JC / T 408-2005;

[0097] (7) The tack-free time of the waterproof coating is tested according to the test method in the standard of JC / T 408-2005;

[0098] The test results are shown in Table 2.

[0099] Table 2

[0100]

[0101] It can be seen from the above results that the waterproof coating prepared by using the waterproof coating composition provided by the present application has suitable viscosity, excellent bonding strength, peeling strength and elongation, and short tack-free time, and can effectively shorten the construction period.

[0102] The above describes the preferred embodiments of the present application in detail, but the present application is not limited thereto. Within the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be considered as the disclosed content of the present application, and all fall within the protection scope of the present application.

Claims

1. A composition for waterproof coatings, characterized in that, The composition contains a main agent and an auxiliary agent, wherein the main agent includes SBS modified emulsified bitumen, acrylic emulsion and a first component; Based on the total weight of the composition, the content of the SBS modified emulsified bitumen is 30wt%-40wt%, the content of the acrylic emulsion is 20wt%-25wt%, and the content of the first component is 35wt%-45wt%. The first component contains hemihydrate gypsum and component A in a mass ratio of 1:0.5-2; Component A is calcium carbonate and / or barium sulfate; The SBS modified emulsified asphalt has a softening point ≥70℃, an evaporation residue ductility ≥100cm, and an evaporation residue low-temperature ductility ≥15cm at -10℃. The acrylic emulsion has an elongation of ≥1500% and a bonding strength of ≥0.8MPa. The acrylic emulsion is a product purchased from Dongying Jinyoulai Industry and Trade Co., Ltd., with the brand name GT-167.

2. The composition according to claim 1, characterized in that, The additives include thickeners, defoamers, pH adjusters, and dispersants; Based on the total weight of the composition, the content of the thickener is 0.3wt%-1.0wt%, the content of the defoamer is 0.5wt%-1.0wt%, the content of the pH adjuster is 0.1wt%-0.3wt%, and the content of the dispersant is 1.0wt%-2.0wt%.

3. The composition according to claim 2, characterized in that, The defoamer is an organosilicon defoamer; And / or, the pH adjuster is selected from at least one of ammonia, aqueous monomethylamine, and aqueous dimethylamine.

4. A method for preparing a waterproof coating, characterized in that, This method is performed using any of the components in the composition according to any one of claims 1-3, comprising: The waterproof coating is obtained by mixing the components of the main agent and the components of the auxiliary agent.

5. The method according to claim 4, characterized in that, The steps for mixing the components in the main agent and the components in the auxiliary agent include: (1) The acrylic emulsion, thickener, pH adjuster and dispersant are first stirred and mixed to obtain intermediate I; (2) The intermediate I and the first component are mixed by a second stirring to obtain intermediate II; (3) The intermediate II, defoamer and SBS modified emulsified asphalt are mixed in contact to obtain the waterproof coating.

6. The method according to claim 5, characterized in that, The speed of the first stirring and mixing is lower than that of the second stirring and mixing; And / or, in step (1), the conditions for the first stirring and mixing include: a rotation speed of 200-400 rpm and a time of 5-20 min; And / or, in step (2), the conditions for the second stirring and mixing include: a rotation speed of 700-800 rpm and a time of 0.5-1.5 h.

7. The method according to claim 5, characterized in that, The contact mixing includes: First, the intermediate II and a portion of the defoamer are mixed in a first contact. Then, the material after the first contact mixing, the SBS modified emulsified asphalt, and the remaining defoamer are mixed in a second contact to obtain the waterproof coating.

8. A waterproof coating prepared by the method according to any one of claims 4-7.

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