CN113943503A - Two-component polymer cement-based waterproof coating composition, two-component polymer cement-based waterproof coating, and preparation method and application thereof - Google Patents
Two-component polymer cement-based waterproof coating composition, two-component polymer cement-based waterproof coating, and preparation method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/06—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement
- C09D1/08—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement with organic additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D109/00—Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons
- C09D109/06—Copolymers with styrene
- C09D109/08—Latex
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Abstract
The invention relates to the technical field of waterproof coatings, in particular to a two-component polymer cement-based waterproof coating composition, a two-component polymer cement-based waterproof coating, a preparation method and an application thereof, wherein the coating composition contains a component A and a component B, and the component A contains the following components which are respectively independently stored or are mixed and stored: butylbenzene emulsion, dispersant, defoamer, preservative, antioxidant, cross-linking agent and thickener, and optionally water; the component B is a cement-based component. The bi-component polymer cement-based waterproof coating prepared from the bi-component polymer cement-based waterproof coating composition provided by the invention has excellent impermeability, water resistance and tensile strength of water immersion treatment.
Description
Technical Field
The invention relates to the technical field of waterproof coatings, in particular to a two-component polymer cement-based waterproof coating composition, a two-component polymer cement-based waterproof coating, and a preparation method and application thereof.
Background
The polymer cement-based waterproof coating (JS waterproof coating for short) is a green environment-friendly material, has the advantages of no environmental pollution, stable performance, excellent aging resistance and long waterproof service life, and is safe to use, convenient to construct and simple to operate.
However, in practical applications, the JS waterproof coating is rarely applied to underground works or parts soaked in water for a long time. The method is mainly limited in that the performance retention rate of the conventional JS product after long-term immersion is difficult to meet the requirement of the long-term direct immersion environment.
The technical indexes of polymer cement waterproof paint in GB 50108 underground engineering waterproof technical specification and the upcoming standard of building and municipal engineering waterproof general specification have higher requirements on the physical properties of waterproof paint after soaking, namely the bond strength and impermeability retention rate after soaking is more than or equal to 80%, the tensile strength after soaking for 168h is more than or equal to 1.5MPa, and the elongation at break is more than or equal to 80%, wherein the tensile strength and elongation at break are values obtained by testing after soaking and taking out the waterproof paint by wiping.
The physical property indexes have important significance for the verification of the water-based paint in a long-term water immersion environment, and meanwhile, the existing polymer cement-based waterproof paint still has great difficulty in achieving the indexes.
Disclosure of Invention
The invention aims to overcome the defect that the indexes of the prior polymer cement-based waterproof coating, such as bonding strength, tensile strength, elongation at break and the like after soaking in water, are difficult to reach the national standard.
The inventor of the invention discovers in research that the butylbenzene emulsion with solid content of 45-60 mass%, average particle size of 100-200nm, pH value of 6-9 and glass transition temperature of-20-0 ℃ can improve the water resistance after film formation, and has good stability and open time when being mixed with cement filler subsequently; meanwhile, carboxyl functional groups are introduced, so that the wettability of the styrene-butadiene emulsion on cement fillers can be obviously improved, and the adhesive force of the waterproof coating on a base material, particularly concrete, can be improved.
In order to achieve the above object, a first aspect of the present invention provides a two-component polymer cement-based waterproof coating composition comprising a component a and a component B, wherein the component a comprises the following components stored independently or in a mixture of two or more of them: butylbenzene emulsion, dispersant, defoamer, preservative, antioxidant, cross-linking agent and thickener, and optionally water; the component B is a cement-based component;
based on 100 parts by weight of the component A, the content of the styrene-butadiene emulsion is 60-98 parts by weight, the content of the dispersant is 0.1-0.5 part by weight, the content of the defoamer is 0.1-0.5 part by weight, the content of the preservative is 0.1-0.5 part by weight, the content of the antioxidant is 0.1-1 part by weight, the content of the crosslinking agent is 0.1-1 part by weight, the content of the thickening agent is 0.1-1 part by weight, and the content of the water is 0-40 part by weight;
in the coating composition, the content weight ratio of the component A to the component B is 1: 0.8 to 2;
wherein the solid content of the butylbenzene emulsion is 45-60 mass%, the average particle size is 100-200nm, the pH value is 6-9, and the glass transition temperature is-20 ℃ to 0 ℃.
In a second aspect the present invention provides a method of preparing a two-component polymer cement-based waterproofing coating, the method comprising: mixing the components of the coating composition of the first aspect; wherein the operation of mixing the components of the coating composition comprises the following steps:
(1) carrying out first mixing on each component in the component A to obtain a mixture I, wherein the component A contains a butylbenzene emulsion, a dispersing agent, a defoaming agent, a preservative, an antioxidant, a cross-linking agent and a thickening agent, and optionally contains water;
(2) secondly mixing the components in the component B to obtain a mixture II, wherein the component B is a cement-based component;
(3) and thirdly mixing the mixture I and the mixture II to obtain the two-component polymer cement-based waterproof coating.
In a third aspect, the present invention provides a two-component polymer cement-based waterproofing coating prepared by the method of the second aspect.
In a fourth aspect, the present invention provides the use of the two-component polymer cement-based waterproof coating material according to the third aspect in waterproofing layers for buildings.
Compared with the existing coating technology, the two-component polymer cement-based waterproof coating provided by the invention has at least the following advantages:
(1) the operable time of the bi-component polymer cement-based waterproof coating provided by the invention is far higher than that of standard requirement by 30min and reaches 60 min;
(2) the impermeability of the coating film of the bi-component polymer cement-based waterproof coating provided by the invention is far higher than 0.3MPa required by the standard, reaches 0.6MPa, and is not reduced after being soaked in water for 7 days;
(3) the tensile strength of the bi-component polymer cement-based waterproof coating in the water immersion treatment reaches 1.5MPa, and the maintenance time of the water immersion treatment is much longer than 168 hours required by the standard and reaches 1152 hours;
(4) the bi-component polymer cement-based waterproof coating provided by the invention has the advantages of environmental protection, meets the requirements of JC 1066-.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
It should be noted that, in various aspects of the present invention, the present invention is described only once in one aspect thereof without repeated description with respect to the same components in the aspects, and those skilled in the art should not be construed as limiting the present invention.
As described above, the first aspect of the present invention provides a two-component polymer cement-based waterproof coating composition comprising a component a and a component B, wherein the component a comprises the following components stored independently or in a mixture of two or more of them: butylbenzene emulsion, dispersant, defoamer, preservative, antioxidant, cross-linking agent and thickener, and optionally water; the component B is a cement-based component;
based on 100 parts by weight of the component A, the content of the styrene-butadiene emulsion is 60-98 parts by weight, the content of the dispersant is 0.1-0.5 part by weight, the content of the defoamer is 0.1-0.5 part by weight, the content of the preservative is 0.1-0.5 part by weight, the content of the antioxidant is 0.1-1 part by weight, the content of the crosslinking agent is 0.1-1 part by weight, the content of the thickening agent is 0.1-1 part by weight, and the content of the water is 0-40 part by weight;
in the coating composition, the content weight ratio of the component A to the component B is 1: 0.8 to 2;
wherein the solid content of the butylbenzene emulsion is 45-60 mass%, the average particle size is 100-200nm, the pH value is 6-9, and the glass transition temperature is-20 ℃ to 0 ℃.
Preferably, the cement-based component contains cement and a filler, and optionally also contains a water reducing agent;
based on 100 parts by weight of the component B, the cement content is 30-80 parts by weight, the filler content is 20-70 parts by weight, and the water reducing agent content is 0-0.5 part by weight.
Preferably, the solid content of the butylbenzene emulsion is 48-53 mass%, the average particle size is 120-180nm, the pH value is 7-9, and the glass transition temperature is-15 ℃ to-5 ℃.
Preferably, the butylbenzene emulsion is prepared by a method comprising the following steps:
the weight ratio of the dosage is 1: 2-6: 2-6: 30-80: 20-80: 0.5-2 of emulsifier, carboxylic acid monomer, functional monomer, butadiene, styrene and initiator to carry out free radical emulsion copolymerization reaction, wherein the emulsifier is a reactive surfactant. The present invention has no particular requirement on the specific types of the emulsifier, the carboxylic acid monomer, the functional monomer, the butadiene, the styrene and the initiator used for preparing the styrene-butadiene emulsion, and can be various specific types of the above-mentioned substances known in the art.
Under the preferable embodiment, the inventor finds that the prepared styrene-butadiene emulsion has the characteristics of excellent water resistance and high elasticity after film formation, has a better promotion effect on the hydration of a cement mortar system, can fully exert the water resistance of an inorganic material, and has better early strength and durability.
Preferably, the dispersant is selected from at least one of polyacrylate, polyphosphate, polycarboxylate, cellulose derivative, fatty acid polyglycol ester, and sodium lauryl sulfate. The present invention does not particularly require a specific kind of dispersant, and illustratively, it may be an ammonium polyacrylate salt.
Preferably, the defoaming agent is selected from at least one of fatty acid and salt thereof, phosphate ester, hydrocarbon oil, polyether and organic silicon polymer. The invention does not require a specific kind of defoaming agent, and may be exemplified by polysiloxane.
Preferably, the preservative is at least one of 1, 2-benzisothiazolinone, methylisothiazolinone and methylchloroisothiazolinone.
According to a particularly preferred embodiment, the dispersant is selected from at least one of polyacrylates, polyphosphates, polycarboxylates, cellulose derivatives, fatty acid polyglycol esters and sodium lauryl sulfate; the defoaming agent is selected from at least one of fatty acid and salts thereof, phosphate esters, hydrocarbon oils, polyethers and organic silicon polymers; the preservative is at least one of 1, 2-benzisothiazolinone, methylisothiazolinone and methylchloroisothiazolinone.
Preferably, the antioxidant comprises the following components in percentage by weight of 1: 1-4 of a hindered phenol selected from at least one of pentaerythrityl tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate; the phosphite ester antioxidant is tris [2, 4-di-tert-butylphenyl ] phosphite.
The inventors found that the antioxidant can inhibit, capture and decompose free radicals generated by oxidation of the butylbenzene emulsion.
Preferably, the cross-linking agent is selected from at least one of vinyltriethoxysilane, vinyltrimethoxysilane, glycidoxypropyltrimethoxysilane, phenyltributyroximosilane and methyltribunoximosilane.
More preferably, the cross-linking agent is a combination containing a first cross-linking agent and a second cross-linking agent, the first cross-linking agent is selected from at least one of vinyl triethoxysilane, vinyl trimethoxysilane and glycidyl ether propyl trimethoxysilane, the second cross-linking agent is selected from at least one of phenyl tributyrine oxime silane and methyl tributyrine oxime silane, and the content weight ratio of the first cross-linking agent to the second cross-linking agent is 1: 0.5-2.
In the invention, phenyl tributyrinoxime silane and methyl tributyrinoxime silane are applied to a two-component polymer cement-based waterproof coating as a cross-linking agent for the first time in the industry, and the inventor finds that under the preferable embodiment, the retention rate of the strength and the elongation of the waterproof coating after soaking can be improved, the wettability of a cement filler can be improved, and the flocculation and the sedimentation of the coating can be prevented.
Preferably, the thickener is at least one selected from bentonite, alkali-swellable acrylic acid, nonionic polyurethane, and cellulose ethers. The present invention does not particularly require a specific kind of thickener, and may be exemplified by associated alkali-swellable acrylic acid, hydroxyethyl cellulose ether.
According to a particularly preferred embodiment, the cross-linking agent is a combination comprising a first cross-linking agent selected from at least one of vinyltriethoxysilane, vinyltrimethoxysilane and glycidoxypropyltrimethoxysilane, and a second cross-linking agent selected from at least one of phenyltributyrinoxime silane and methyltribuzinoxime silane, the weight ratio of the first cross-linking agent to the second cross-linking agent being 1: 0.5 to 2; the thickening agent is at least one selected from bentonite, alkali swelling acrylic acid, nonionic polyurethane and cellulose ether.
Preferably, the cement is selected from at least one of portland cement, high aluminate cement, and sulphoaluminate cement.
Preferably, the filler is selected from at least one of quartz sand, quartz powder, wollastonite powder, calcium carbonate, slag, and metakaolin.
Preferably, the water reducing agent is at least one selected from a lignosulfonate water reducing agent, a naphthalene water reducing agent, a melamine water reducing agent, an aliphatic water reducing agent and a polycarboxylic acid water reducing agent. The present invention does not particularly require a specific kind of water reducing agent, and may be exemplified by sodium naphthalenesulfonate formaldehyde condensate and melamine formaldehyde condensate.
According to a particularly preferred embodiment, the cement is selected from at least one of portland cement, high aluminate cement and sulphoaluminate cement; the filler is selected from at least one of quartz sand, quartz powder, wollastonite powder, calcium carbonate, slag and metakaolin; the water reducing agent is selected from at least one of lignosulfonate water reducing agent, naphthalene water reducing agent, melamine water reducing agent, aliphatic water reducing agent and polycarboxylic acid water reducing agent.
In order to obtain a two-component polymer cement-based waterproof coating material having higher barrier properties, water resistance and tensile strength in water immersion treatment, as described above, the second aspect of the present invention provides a method for preparing a two-component polymer cement-based waterproof coating material, the method comprising: mixing the components of the coating composition of the first aspect; wherein the operation of mixing the components of the coating composition comprises the following steps:
(1) carrying out first mixing on each component in the component A to obtain a mixture I, wherein the component A contains a butylbenzene emulsion, a dispersing agent, a defoaming agent, a preservative, an antioxidant, a cross-linking agent and a thickening agent, and optionally contains water;
(2) secondly mixing the components in the component B to obtain a mixture II, wherein the component B is a cement-based component;
(3) and thirdly mixing the mixture I and the mixture II to obtain the two-component polymer cement-based waterproof coating.
Preferably, in step (1), the first mixing condition at least satisfies: the stirring speed is 500-800r/min, the time is 30-40min, and the temperature is 5-35 ℃.
Preferably, in step (2), the second mixing condition at least satisfies: the stirring speed is 100-300r/min, the time is 20-30min, and the temperature is 5-35 ℃.
Preferably, in step (3), the third mixing condition at least satisfies: the stirring speed is 500-800r/min, the time is 5-10min, and the temperature is 5-35 ℃.
According to a particularly preferred embodiment, the operation of mixing the components of the coating composition comprises the following steps:
(1) sequentially adding the butylbenzene emulsion, the dispersing agent, the defoaming agent, the preservative, the antioxidant and the crosslinking agent into a dispersion cylinder, stirring for 15-20min at the temperature of 5-35 ℃ at the speed of 500-;
(2) adding cement, filler and water reducing agent into a mixing stirrer, and stirring at 100-300r/min and 5-35 ℃ for 20-30min to obtain a mixture II;
(3) and stirring the mixture I and the mixture II at the temperature of between 5 and 35 ℃ for 5 to 10 minutes at the speed of between 500 and 800r/min to obtain the two-component polymer cement-based waterproof coating.
As mentioned above, a third aspect of the present invention provides a two-component polymer cement-based waterproofing coating prepared by the method of the second aspect.
As mentioned above, a fourth aspect of the present invention provides the use of the two-component polymer cement-based waterproofing paint according to the third aspect in waterproofing buildings.
The present invention will be described in detail below by way of examples.
In the following examples, unless otherwise specified, the laboratory instruments and raw materials are commercially available.
Laboratory apparatus
Microcomputer control electronic universal tester: ETM 530B 5000N, Shenzhen Wan testing verification device, Inc.;
waterproofing membrane waterproofing appearance: TDS-5, Longhua instruments Inc. in Cangzhou Earth;
mortar digital display impermeability instrument: SJS-1.5S, Wuxi Instrument mechanical Co., Ltd;
drawing testing machine: LBY-V0.5 grade, Suzhou limited, China building materials testing and certification group.
Raw materials
Styrene-butadiene emulsion: butylbenzene emulsion I, 8763, Shengxi ao Polymer Co., Ltd., solid content of 50 + -1 mass%, average particle diameter of 150nm, pH value of 7-9, glass transition temperature of-15 deg.C;
styrene-butadiene emulsion: butylbenzene emulsion II, 7811, Pasteur chemical company, solid content of 54 + -1 wt%, average particle diameter of 168nm, pH value of 7.0-8.5, and glass transition temperature of-10 deg.C;
styrene-butadiene emulsion: butylbenzene emulsion III, ECO-7623, Passion chemical company, solid content 51 + -1 mass%, average particle diameter 200nm, pH 7-9, glass transition temperature 14 deg.C;
dispersing agent: ammonium polyacrylate salt having a solid content of 43% by mass, SN-5027, St.Nopongae, Japan;
defoaming agent: silicone, SN-154, santo pu japan;
defoaming agent: polyether, DF-103, Dow company, USA;
preservative: 1, 2-benzisothiazolinone, BIT20N, langson chemical ltd;
preservative: the weight ratio of the contents is 1: 3 methylisothiazolinone and methylchloroisothiazolinone, LXE, roman hass corporation;
antioxidant: tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] pentaerythritol ester, Irganox 1010, Pasteur chemical Co., Ltd;
antioxidant: octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, Irganox 1076, Pasteur chemical Co., Ltd;
antioxidant: tris [2, 4-di-tert-butylphenyl ] phosphite, Irgafos 168, BASF chemical Co., Ltd;
a crosslinking agent: glycidyl ether propyl trimethoxysilane, a187, mei-co, usa;
a crosslinking agent: vinyltrimethoxysilane, a171, mei-co, usa;
a crosslinking agent: methyltributanone oxime silane, D30, new materials of new blues, hobei;
a crosslinking agent: phenyltributonoximosilane, D36, New Material Ltd, New blue sky, Hubei;
thickening agent: alkali-swellable acrylic acid, TT-935, Rohm and Haas, USA;
cement: portland cement, P.O 42.5, Foshan conch Cement, Inc.;
filling: wollastonite powder, 400 mesh, Hebei Yanxi mineral processing factory;
filling: metakaolin, 1250 mesh, gold source mineral industry processing factory in Lingshou county, Hebei province;
filling: coarse whiting powder, 400 mesh, Guibao powder, Limited liability company, Hezhou;
filling: slag, grade S95, sailing mine products trade ltd, lingshou county;
water reducing agent: polycarboxylate superplasticizer 540P, west ka china ltd.
The amounts of the components in the following examples are all expressed in parts by weight. Unless otherwise specified, the mass per weight part is 1 kg.
In the following examples, the performance test methods involved are as follows:
the performance test is carried out according to the technical requirements of the polymer cement waterproof coating in GB 50108-2008 & lt & gt underground engineering waterproof technical Specification & gt and GB/T23445-2009 & lt & gt polymer cement waterproof coating & gt standards, and the GB 50108-2008 & lt & gt underground engineering waterproof technical Specification & gt is taken as the main standard, wherein the performance test is carried out according to the GB/T23445-2009 & lt & gt polymer cement waterproof coating & gt standard which is not noted.
Example 1
This example illustrates a two-part polymer cement-based waterproofing coating composition according to the present invention prepared according to the formulation and process parameters in table 1 and as described below.
The method for preparing the two-component polymer cement-based waterproof coating comprises the following steps of:
(1) sequentially adding the butylbenzene emulsion, the dispersing agent, the defoaming agent, the preservative, the antioxidant and the crosslinking agent into a dispersion tank, stirring for 20min at the temperature of 25 ℃ at the speed of 600r/min, then adding the thickening agent and water, and continuing stirring for 20min to obtain a mixture I;
(2) adding cement, a filler and a water reducing agent into a mixing stirrer, and stirring at 25 ℃ for 30min at 200r/min to obtain a mixture II;
(3) and stirring the mixture I and the mixture II at 800r/min and 25 ℃ for 10min to obtain the two-component polymer cement-based waterproof coating S1.
The remaining examples were carried out using the same procedure as in example 1, except that the formulation and the process parameters of the two-component polymer cement-based waterproof coating composition used were different, without specific mention, in table 1.
Example 4
This example was carried out using a procedure similar to that of example 1, except that: in the formula, the butylbenzene emulsion I is replaced by butylbenzene emulsion II with equal mass, and the details are shown in Table 1.
Comparative example 1
This comparative example was carried out using a procedure similar to that of example 1, except that: in the formula, the butylbenzene emulsion I is replaced by butylbenzene emulsion III with equal mass, and the details are shown in Table 1.
Comparative example 2
This comparative example was carried out using a procedure similar to that of example 1, except that: the formulations contained no dispersant, see in particular table 1.
Comparative example 3
This comparative example was carried out using a procedure similar to that of example 1, except that: the formulation does not contain an antioxidant, as shown in table 1.
Comparative example 4
This comparative example was carried out using a procedure similar to that of example 1, except that: the formulations did not contain a cross-linking agent, as shown in table 1.
TABLE 1
Table 1 (continuation watch)
The two-component polymer cement-based waterproof coating obtained in each example was subjected to performance measurement using the aforementioned test method, and the specific results are shown in table 2.
TABLE 2
Table 2 (continuation watch)
From the results, the bi-component polymer cement-based waterproof coating prepared by the bi-component polymer cement-based waterproof coating composition provided by the invention has excellent impermeability, water resistance and tensile strength after soaking treatment, the water absorption rate of the bi-component polymer cement-based waterproof coating is less than 5% after soaking for 168h, the tensile strength of the bi-component polymer cement-based waterproof coating is more than 1.5MPa after soaking for 1152h, and the excellent water resistance and durability of the bi-component polymer cement-based waterproof coating can completely meet the requirements of the GB 50108-.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (10)
1. The two-component polymer cement-based waterproof coating composition is characterized by comprising a component A and a component B, wherein the component A comprises the following components which are stored independently or in a mixed manner: butylbenzene emulsion, dispersant, defoamer, preservative, antioxidant, cross-linking agent and thickener, and optionally water; the component B is a cement-based component;
based on 100 parts by weight of the component A, the content of the styrene-butadiene emulsion is 60-98 parts by weight, the content of the dispersant is 0.1-0.5 part by weight, the content of the defoamer is 0.1-0.5 part by weight, the content of the preservative is 0.1-0.5 part by weight, the content of the antioxidant is 0.1-1 part by weight, the content of the crosslinking agent is 0.1-1 part by weight, the content of the thickening agent is 0.1-1 part by weight, and the content of the water is 0-40 part by weight;
in the coating composition, the content weight ratio of the component A to the component B is 1: 0.8 to 2;
wherein the solid content of the butylbenzene emulsion is 45-60 mass%, the average particle size is 100-200nm, the pH value is 6-9, and the glass transition temperature is-20 ℃ to 0 ℃.
2. The coating composition of claim 1, wherein the cementitious component comprises cement and a filler, and optionally further comprises a water reducing agent;
based on 100 parts by weight of the component B, the cement content is 30-80 parts by weight, the filler content is 20-70 parts by weight, and the water reducing agent content is 0-0.5 part by weight.
3. The coating composition as claimed in claim 1 or 2, wherein the styrene-butadiene emulsion has a solid content of 48 to 53% by mass, an average particle diameter of 120-180nm, a pH value of 7 to 9, and a glass transition temperature of-15 ℃ to-5 ℃.
4. The coating composition according to any one of claims 1 to 3, wherein the dispersant is selected from at least one of polyacrylates, polyphosphates, polycarboxylates, cellulose derivatives, fatty acid polyethylene glycol esters, and sodium lauryl sulfate;
and/or the defoaming agent is selected from at least one of fatty acid and salt thereof, phosphate ester, hydrocarbon oil, polyether and organic silicon polymer;
and/or the preservative is at least one of 1, 2-benzisothiazolinone, methylisothiazolinone and methylchloroisothiazolinone;
and/or the antioxidant comprises the following components in percentage by weight of 1: 1-4 of a hindered phenol selected from at least one of pentaerythrityl tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate; the phosphite ester antioxidant is tris [2, 4-di-tert-butylphenyl ] phosphite;
and/or, the cement is selected from at least one of portland cement, high aluminate cement and sulphoaluminate cement;
and/or the filler is selected from at least one of quartz sand, quartz powder, wollastonite powder, calcium carbonate, slag and metakaolin;
and/or the water reducing agent is at least one selected from a lignosulfonate water reducing agent, a naphthalene water reducing agent, a melamine water reducing agent, an aliphatic water reducing agent and a polycarboxylic acid water reducing agent.
5. The coating composition of any one of claims 1-4, wherein the crosslinker is selected from at least one of vinyltriethoxysilane, vinyltrimethoxysilane, glycideth-propyltrimethoxysilane, phenyltributyroximosilane, methyltributroximosilane;
and/or the thickening agent is at least one selected from bentonite, alkali swelling acrylic acid, nonionic polyurethane and cellulose ether.
6. The coating composition of any one of claims 1-5, wherein the crosslinker is a combination comprising a first crosslinker selected from at least one of vinyltriethoxysilane, vinyltrimethoxysilane, glycidyl ether propyl trimethoxysilane, and a second crosslinker selected from at least one of phenyltributyrinoxime silane and methyltributanoxime silane, wherein the weight ratio of the first crosslinker to the second crosslinker is 1: 0.5-2.
7. A method for preparing a two-component polymer cement-based waterproofing coating, characterized in that the method comprises: mixing the components of the coating composition of any one of claims 1-6; wherein the operation of mixing the components of the coating composition comprises the following steps:
(1) carrying out first mixing on each component in the component A to obtain a mixture I, wherein the component A contains a butylbenzene emulsion, a dispersing agent, a defoaming agent, a preservative, an antioxidant, a cross-linking agent and a thickening agent, and optionally contains water;
(2) secondly mixing the components in the component B to obtain a mixture II, wherein the component B is a cement-based component;
(3) and thirdly mixing the mixture I and the mixture II to obtain the two-component polymer cement-based waterproof coating.
8. The method of claim 7, wherein in step (1), the first mixing condition at least satisfies: the stirring speed is 500-800r/min, the time is 30-40min, and the temperature is 5-35 ℃;
and/or, in step (2), the second mixing conditions at least satisfy: the stirring speed is 100-300r/min, the time is 20-30min, and the temperature is 5-35 ℃;
and/or, in step (3), the third mixing condition at least satisfies: the stirring speed is 500-800r/min, the time is 5-10min, and the temperature is 5-35 ℃.
9. A two-component polymer cement-based waterproofing coating prepared by the method of claim 7 or 8.
10. Use of the two-component polymer cement-based waterproofing coating according to claim 9 in waterproofing of buildings.
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