CN112174585A - Polymer cement waterproof coating and preparation method thereof - Google Patents
Polymer cement waterproof coating and preparation method thereof Download PDFInfo
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- CN112174585A CN112174585A CN202011002036.5A CN202011002036A CN112174585A CN 112174585 A CN112174585 A CN 112174585A CN 202011002036 A CN202011002036 A CN 202011002036A CN 112174585 A CN112174585 A CN 112174585A
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- polymer cement
- waterproof coating
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/65—Water proofers or repellants
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a polymer cement waterproof coating and a preparation method thereof, wherein the polymer cement waterproof coating comprises a component A and a component B, and the mass ratio of the component A to the component B is 1: 0.7-1: 1.5; the component A comprises the following components in parts by mass: 70-95 parts of modified emulsion and 5-30 parts of water; the component B comprises the following components in parts by mass: 55-65 parts of cement, 30-40 parts of quartz sand and 2-5 parts of active master batch; the preparation method specifically comprises the following steps: (1) uniformly mixing the modified emulsion and water in a reaction vessel to obtain a component A; (2) adding cement, quartz sand and active master batch into stirring equipment, and uniformly mixing to obtain a component B; (3) and uniformly mixing the component A and the component B according to the mass ratio to obtain the polymer cement waterproof coating. The preparation method is simple, and the prepared coating has short drying time, high bonding strength and good high and low temperature performance, and can automatically repair fine cracks generated in the using process of the coating.
Description
Technical Field
The invention belongs to the technical field of building waterproof coatings, and particularly relates to a polymer cement waterproof coating and a preparation method thereof.
Background
Most of the existing polymer cement waterproof coatings are two-component water-based building waterproof coatings, have the dual properties of durability of inorganic materials and high elasticity of organic materials, are ideal new-generation nontoxic green environment-friendly waterproof products at present, are rapidly developed in recent years due to simple construction, high coating strength and good waterproof effect, and are widely applied to the building waterproof industry.
However, the conventional common polymer cement waterproof coating has poor crack resistance, is usually pulled open due to shrinkage deformation of a base layer, and is easy to deform or generate fine cracks under the action of external force after being brushed, so that a local waterproof layer is damaged, the waterproof capability of the coating is reduced, and the application of the polymer cement waterproof coating is limited.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects and shortcomings in the background technology, and provides a polymer cement waterproof coating which is short in drying time, high in bonding strength, good in high and low temperature performance and capable of automatically repairing tiny cracks generated in the using process of the coating.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the polymer cement waterproof coating comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 1: 0.7-1: 1.5;
the component A comprises the following components in parts by mass: 70-95 parts of modified emulsion and 5-30 parts of water;
the component B comprises the following components in parts by mass: 55-65 parts of cement, 30-40 parts of quartz sand and 2-5 parts of active master batch.
The design idea of the technical scheme is that the components and the content of the polymer cement waterproof coating are designed in a targeted manner, and the active master batch is added into the components, so that fine cracks generated in the polymer cement waterproof coating can be automatically repaired in the using process, and the crack resistance and the deformation resistance of the coating are improved; meanwhile, the invention increases the content of solid substances such as cement, quartz sand and the like, and improves the solid content of the polymer cement waterproof coating, thereby shortening the drying time of the coating.
Preferably, the active master batch comprises the following components in parts by mass: 10-20 parts of sodium silicate, 10-30 parts of sodium aluminate, 10-30 parts of calcium chloride, 10-30 parts of sodium carbonate, 0.5-1 part of hydroxymethyl cellulose, 5-10 parts of citric acid, 5-10 parts of sodium methylsulfonate, 5-10 parts of trisodium phosphate and 0.5-1 part of sodium gluconate. The active master batch with the components and the proportion can slightly dissolve in water after the action of water when the polymer cement waterproof coating generates cracks due to the action of external force and leaks water, and chemically react with powder in the waterproof coating to generate a water-insoluble dendritic fiber crystal which absorbs water and expands in the cracks and repairs the cracks within a short time from sparse to dense to form a new waterproof layer, thereby preventing the further leakage of water.
Preferably, the modified emulsion comprises emulsion C having a glass transition temperature of more than 20 ℃ and emulsion D having a glass transition temperature of less than-20 ℃. The modified emulsion obtained by reasonably compounding the emulsion with higher glass-transition temperature and the emulsion with lower glass-transition temperature is added into the polymer cement waterproof coating, so that the physical characteristics of the polymer emulsion can be utilized to improve the high-temperature and low-temperature performances of the polymer cement waterproof coating, and the applicability of the coating in different environments is improved.
Preferably, the emulsion C is styrene-acrylic emulsion and styrene-butadiene emulsion, and the emulsion D is vinyl acetate-ethylene copolymer emulsion. The three emulsions are compounded to prepare the coating, so that the physical property and high and low temperature adaptive resistance of the coating can be enhanced to the greatest extent.
Preferably, the quartz sand is prepared by grading quartz sand with 100 meshes and 150 meshes. The 100-mesh and 150-mesh quartz sand is used for grading, so that the bonding strength of the polymer cement waterproof coating can be improved, and the physical properties of the coating in use are improved.
Preferably, the component A further comprises 0.2-1 part by mass of a defoaming agent. The addition of the defoaming agent can reduce the interfacial tension of the component A, thereby promoting the uniform mixing of the modified emulsion and water and improving the overall stability of the component A.
Preferably, the component B also comprises 1-5 parts by mass of a water reducing agent. The water reducing agent is added, so that the fluidity and the structural strength of the polymer cement waterproof coating can be effectively improved, the cement addition amount and the water amount of the coating can be saved when the strength is kept unchanged, and the cost is saved.
Preferably, the component B further comprises an auxiliary agent in parts by mass, and the auxiliary agent is one or two of a stabilizer and a thickening agent. The stabilizer and/or the thickening agent are added into the component B, so that the overall viscosity of the component B can be improved, the deformation degree of the coating in use is reduced, and the overall shear strength of the coating is improved.
Preferably, in the above technical solution, the additive amount of the additive is 0.5 to 3 parts by mass. The rheological properties of the component B and the polymer cement waterproof coating can be caused by excessive addition of the auxiliary agent, and the stirring, mixing and use of the component B and the polymer cement waterproof coating are not facilitated; if the addition amount of the auxiliary agent is too small, the corresponding tackifying effect is difficult to achieve.
Based on the same technical concept, the invention also provides a preparation method of the polymer cement waterproof coating, which comprises the following steps:
(1) uniformly mixing the modified emulsion and water in a reaction container to obtain a component A;
(2) adding the cement, the quartz sand and the active master batch into stirring equipment, and uniformly mixing to obtain a component B;
(3) and uniformly mixing the component A and the component B according to the mass ratio to obtain the polymer cement waterproof coating.
Compared with the prior art, the invention has the beneficial effects that: the polymer cement waterproof coating is short in drying time, and the surface drying time is only 20-40 minutes; the bonding strength is high and reaches 1.5-2.5 Mpa, which exceeds the requirements of national standard; high and low temperature performances are good, the high temperature and the low temperature performances can respectively resist the high temperature of more than 100 ℃, and the low temperature performance is-10 ℃. The self-repairing material can also be used for self-repairing (self-closing) of fine cracks generated in the using process of the material, and the self-repairing time is 8-16 hours; meanwhile, the preparation method is simple and easy to implement, does not need to use complex equipment, and is suitable for large-scale industrial production.
Detailed Description
In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1:
the polymer cement waterproof coating of the embodiment consists of a component A and a component B, wherein the proportion of raw materials, the dosage and the A, B component in the A, B components is shown in Table 1.
The modified emulsion of this example was a styrene acrylic emulsion, commercially available from pasteur rich.
The defoamer in the example is an aqueous defoamer, self-made.
The cement of this example was 42.5R type, commercially available from the conch cement company.
The silica sand of this example comprised two sizes, 100 mesh and 150 mesh, and was purchased commercially from Guangdong Qingyuan silica sand company.
The auxiliary agent of the embodiment comprises a water reducing agent, a thickening agent and a stabilizing agent, is purchased from Guangzhou Kowa chemical company and is purchased from the market.
The active master batch of the embodiment is an active master batch STJJ, and is prepared by self; the active master batch consists of the following components: 10 parts of sodium silicate, 10 parts of sodium aluminate, 10 parts of calcium chloride, 10 parts of sodium carbonate, 0.5 part of hydroxymethyl cellulose, 10 parts of citric acid, 10 parts of sodium methanesulfonate, 10 parts of trisodium phosphate and 1 part of sodium gluconate.
The preparation method of the polymer cement waterproof coating comprises the following steps:
(1) pumping the modified emulsion and industrial water (the weighing tolerance is +/-0.1 kg) into a reaction kettle according to the mixture ratio in the table 1, uniformly stirring, adding the auxiliary agent in batches, and stirring to obtain the component A.
(2) The cement, the quartz sand and the active master batch according to the mixture ratio in the table 1 are added into a stirring tank in a metering way (the weighing allowance error is +/-0.1 kg), and the mixture is uniformly stirred to obtain the component B.
(3) And uniformly mixing the component A and the component B according to the mass ratio to obtain the polymer cement waterproof coating.
Example 2:
the polymer cement waterproof coating of the embodiment consists of a component A and a component B, wherein the proportion of raw materials, the dosage and the A, B component in the A, B components is shown in Table 1.
The modified emulsions of this example were styrene-acrylic emulsion and VAE emulsion, commercially available from Badifu, Inc.
The defoamer in the example is an aqueous defoamer, self-made.
The cement of this example was 42.5R type, commercially available from the conch cement company.
The silica sand of this example comprised two sizes, 100 mesh and 150 mesh, and was purchased commercially from Guangdong Qingyuan silica sand company.
The auxiliary agent of the embodiment comprises a water reducing agent, a thickening agent and a stabilizing agent, is purchased from Guangzhou Kowa chemical company and is purchased from the market.
The active master batch of the embodiment is an active master batch STJJ, and is prepared by self; the active master batch consists of the following components: 20 parts of sodium silicate, 30 parts of sodium aluminate, 30 parts of calcium chloride, 30 parts of sodium carbonate, 1 part of hydroxymethyl cellulose, 5 parts of citric acid, 5 parts of sodium methanesulfonate, 5 parts of trisodium phosphate and 0.5 part of sodium gluconate.
See example 1 for a method of preparing a polymer cement waterproofing coating.
Example 3:
the polymer cement waterproof coating of the embodiment consists of a component A and a component B, wherein the proportion of raw materials, the dosage and the A, B component in the A, B components is shown in Table 1.
The modified emulsions of this example were a styrene-butadiene emulsion, a styrene-acrylic emulsion, and a VAE emulsion, commercially available from Badfu, Inc.
The defoamer in the example is an aqueous defoamer, self-made.
The cement of this example was 42.5R type, commercially available from the conch cement company.
The silica sand of this example comprised two sizes, 100 mesh and 150 mesh, and was purchased commercially from Guangdong Qingyuan silica sand company.
The auxiliary agent of the embodiment comprises a water reducing agent and a thickening agent, which are purchased from Guangzhou Kowa chemical company.
The active master batch of the embodiment is an active master batch STJJ, and is prepared by self; the active master batch consists of the following components: 13 parts of sodium silicate, 15 parts of sodium aluminate, 15 parts of calcium chloride, 15 parts of sodium carbonate, 0.9 part of hydroxymethyl cellulose, 9 parts of citric acid, 9 parts of sodium methanesulfonate, 9 parts of trisodium phosphate and 0.8 part of sodium gluconate.
See example 1 for a method of preparing a polymer cement waterproofing coating.
Example 4:
the polymer cement waterproof coating of the embodiment consists of a component A and a component B, wherein the proportion of raw materials, the dosage and the A, B component in the A, B components is shown in Table 1.
The modified emulsions of this example were a styrene-butadiene emulsion, a styrene-acrylic emulsion, and a VAE emulsion, commercially available from Badfu, Inc.
The defoamer in the example is an aqueous defoamer, self-made.
The cement of this example was 42.5R type, commercially available from the conch cement company.
The silica sand of this example comprised two sizes, 100 mesh and 150 mesh, and was purchased commercially from Guangdong Qingyuan silica sand company.
The auxiliary agent of the embodiment comprises a water reducing agent, a thickening agent and a stabilizing agent, is purchased from Guangzhou Kowa chemical company and is purchased from the market.
The active master batch of the embodiment is an active master batch STJJ, and is prepared by self; the active master batch consists of the following components: 16 parts of sodium silicate, 20 parts of sodium aluminate, 20 parts of calcium chloride, 20 parts of sodium carbonate, 0.8 part of hydroxymethyl cellulose, 6 parts of citric acid, 6 parts of sodium methanesulfonate, 6 parts of trisodium phosphate and 0.6 part of sodium gluconate.
See example 1 for a method of preparing a polymer cement waterproofing coating.
Example 5:
the polymer cement waterproof coating of the embodiment consists of a component A and a component B, wherein the proportion of raw materials, the dosage and the A, B component in the A, B components is shown in Table 1.
The modified emulsions of this example were a styrene-butadiene emulsion, a styrene-acrylic emulsion, and a VAE emulsion, commercially available from Badfu, Inc.
The defoamer in the example is an aqueous defoamer, self-made.
The cement of this example was 42.5R type, commercially available from the conch cement company.
The silica sand of this example comprised two sizes, 100 mesh and 150 mesh, and was purchased commercially from Guangdong Qingyuan silica sand company.
The auxiliary agent of the embodiment comprises a water reducing agent and a stabilizing agent, which are purchased from Guangzhou Kowa chemical company.
The active master batch of the embodiment is an active master batch STJJ, and is prepared by self; the active master batch consists of the following components: 18 parts of sodium silicate, 25 parts of sodium aluminate, 25 parts of calcium chloride, 25 parts of sodium carbonate, 0.6 part of hydroxymethyl cellulose, 7 parts of citric acid, 8 parts of sodium methanesulfonate, 7.5 parts of trisodium phosphate and 0.7 part of sodium gluconate.
See example 1 for a method of preparing a polymer cement waterproofing coating.
The performance test of the polymer cement waterproof coatings of the embodiments 1 to 5 is carried out, and the results are shown in table 2, and it can be seen from table 2 that the polymer cement waterproof coatings of the embodiments 1 to 5 have the advantages of short drying time, high bonding strength, good high and low temperature performance, can repair fine cracks generated in the use process of the material by self, and have short self-repairing time.
TABLE 1 raw material composition and dosage table of polymer cement waterproof coating of each example
TABLE 2 Performance test results of the Polymer Cement waterproofing paint of each example
Claims (10)
1. The polymer cement waterproof coating is characterized by comprising a component A and a component B, wherein the mass ratio of the component A to the component B is 1: 0.7-1: 1.5;
the component A comprises the following components in parts by mass: 70-95 parts of modified emulsion and 5-30 parts of water;
the component B comprises the following components in parts by mass: 55-65 parts of cement, 30-40 parts of quartz sand and 2-5 parts of active master batch.
2. The polymer cement waterproof coating material according to claim 1, wherein the active master batch comprises the following components in parts by mass: 10-20 parts of sodium silicate, 10-30 parts of sodium aluminate, 10-30 parts of calcium chloride, 10-30 parts of sodium carbonate, 0.5-1 part of hydroxymethyl cellulose, 5-10 parts of citric acid, 5-10 parts of sodium methylsulfonate, 5-10 parts of trisodium phosphate and 0.5-1 part of sodium gluconate.
3. The polymer cement waterproofing coating according to claim 1 wherein the modified emulsion is a combination of emulsion C having a glass transition temperature above 20 ℃ and emulsion D having a glass transition temperature below-20 ℃.
4. The polymer cement waterproof coating material as claimed in claim 3, wherein the emulsion C is a styrene-acrylic emulsion and a styrene-butadiene emulsion, and the emulsion D is a vinyl acetate-ethylene copolymer emulsion.
5. The polymer cement waterproofing coating according to claim 1 wherein said silica sand is prepared from a silica sand grade of 100 mesh and 150 mesh.
6. The polymer cement waterproof coating material as claimed in claim 1, wherein said component A further comprises an antifoaming agent in an amount of 0.2 to 1 part by mass.
7. The polymer cement waterproof coating material according to claim 1, wherein the component B further comprises 0.5 to 5 parts by mass of a water reducing agent.
8. The polymer cement waterproof coating material as claimed in any one of claims 1 to 7, wherein the B component further comprises an auxiliary agent, and the auxiliary agent comprises one or two of a stabilizer and a thickener.
9. The polymer cement waterproof coating material as claimed in claim 8, wherein the addition amount of the auxiliary agent is 0.5 to 3 parts by mass.
10. The preparation method of the polymer cement waterproof coating material of claim 1, which is characterized by comprising the following steps:
(1) uniformly mixing the modified emulsion and water in a reaction container to obtain a component A;
(2) adding the cement, the quartz sand and the active master batch into stirring equipment, and uniformly mixing to obtain a component B;
(3) and uniformly mixing the component A and the component B according to the mass ratio to obtain the polymer cement waterproof coating.
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| CN202011002036.5A CN112174585A (en) | 2020-09-22 | 2020-09-22 | Polymer cement waterproof coating and preparation method thereof |
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| CN202011002036.5A CN112174585A (en) | 2020-09-22 | 2020-09-22 | Polymer cement waterproof coating and preparation method thereof |
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| CN102320787A (en) * | 2011-08-08 | 2012-01-18 | 大岩（上海）建筑材料有限公司 | Self-closing polymer cement waterproof coating and preparation method thereof |
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| CN111018430A (en) * | 2018-10-10 | 2020-04-17 | 天津市叁零叁建材有限公司 | Polymer cement-based waterproof coating and preparation method thereof |
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2020
- 2020-09-22 CN CN202011002036.5A patent/CN112174585A/en active Pending
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| KR100956955B1 (en) * | 2009-08-06 | 2010-05-11 | 하태훈 | Cement-polymer modified waterproof coatings and preparation method thereof |
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| CN102320787A (en) * | 2011-08-08 | 2012-01-18 | 大岩（上海）建筑材料有限公司 | Self-closing polymer cement waterproof coating and preparation method thereof |
| CN104177007A (en) * | 2014-08-11 | 2014-12-03 | 上海应用技术学院 | Retarding self-closing polymer cement waterproof coating |
| CN111018430A (en) * | 2018-10-10 | 2020-04-17 | 天津市叁零叁建材有限公司 | Polymer cement-based waterproof coating and preparation method thereof |
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