CN113637384A - Environment-friendly epoxy resin composite waterproof coating, preparation method and construction method thereof, and waterproof coating - Google Patents
Environment-friendly epoxy resin composite waterproof coating, preparation method and construction method thereof, and waterproof coating Download PDFInfo
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- CN113637384A CN113637384A CN202110846650.8A CN202110846650A CN113637384A CN 113637384 A CN113637384 A CN 113637384A CN 202110846650 A CN202110846650 A CN 202110846650A CN 113637384 A CN113637384 A CN 113637384A
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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Abstract
The invention belongs to the technical field of waterproof materials, and particularly relates to an environment-friendly epoxy resin composite waterproof coating, a preparation method and a construction method thereof, and a waterproof coating. The component A comprises: the water-based epoxy curing agent comprises a water-based epoxy curing agent, a styrene-acrylic emulsion, a first filler, a first wetting dispersant, a first defoaming agent, a first organic bentonite thickener and first part of water; the component B comprises: the water-based epoxy resin paint comprises water-based epoxy resin, a second filler, a second wetting dispersant, a second defoaming agent, a second organic bentonite thickener and second water. The waterproof coating disclosed by the invention is water-based, environment-friendly, low in smell and free of pollution. The finally formed waterproof film has the high mechanical strength of epoxy resin and the flexibility of styrene-acrylic resin, the coating adhesion strength of the material on a dry concrete base layer in the embodiment can reach more than 4MPa, and the waterproof coating adhesion strength of a concrete plate coated with the waterproof coating in the embodiment can still reach more than 3MPa after the concrete plate is soaked in water for 12 months.
Description
Technical Field
The invention belongs to the technical field of waterproof materials, and particularly relates to an environment-friendly epoxy resin composite waterproof coating, a preparation method and a construction method thereof, and a waterproof coating.
Background
Common waterproof materials in the market mainly comprise various cement-based waterproof mortars/coatings, polyurethane waterproof coatings, various waterproof coiled materials and the like. The polyurethane waterproof material and the coiled material are not suitable for being used indoors due to environmental protection or construction complexity, and although the cement-based waterproof mortar/coating is widely used for waterproof maintenance and renovation of civil buildings, the cement-based waterproof mortar/coating has the problems of poor effect, poor durability and the like in waterproof maintenance of the back water surface of the building, so that the problems cannot be effectively solved, and a product which is easy to construct, good in waterproof effect and good in durability is needed to solve the problems. The epoxy material is a thermosetting material, has good structural stability once formed, has the characteristics of good chemical stability, good sealing property, high mechanical strength and the like, can be used as a common adhesive, can adapt to various base layers including concrete, and has excellent bonding property. With the development of the technology, the architectural painting type epoxy material is developed towards the water-based material, has obvious environmental protection advantage compared with the traditional oily epoxy material, and can be used in the indoor of buildings.
The inventor finds that the curing agent component of the common waterborne epoxy coating product is not usually premixed with the filler, mainly because the epoxy curing agent has poor stability after being mixed with various fillers, and a special formula design is required to realize the long-term stability of the system. In addition, epoxy resin materials are generally poor in flexibility, but epoxy resin materials with certain flexibility are generally low in strength.
Disclosure of Invention
The invention aims to solve the problems, and provides a modified environment-friendly epoxy resin composite waterproof material and a preparation method thereof, aiming at the problems of poor environmental protection of the traditional solvent type epoxy coating, poor water resistance of the conventional waterproof coating, poor compatibility of epoxy curing agent components and fillers, poor flexibility of epoxy resin coatings and the like.
In order to achieve the above object, a first aspect of the present invention provides an environment-friendly epoxy resin composite waterproof coating, which comprises A, B two components:
the component A comprises the following raw materials in parts by weight:
20-40 parts of waterborne epoxy curing agent, 10-40 parts of styrene-acrylic emulsion, 10-40 parts of first filler, 0-10 parts of first wetting dispersant, 0-10 parts of first defoaming agent, 0.1-10 parts of first organic bentonite thickener and 20-50 parts of first water;
the component B comprises the following raw materials in parts by weight:
20-40 parts of water-based epoxy resin, 10-40 parts of second filler, 0-10 parts of second wetting dispersant, 0-10 parts of second defoaming agent, 0.1-10 parts of second organic bentonite thickener and 20-50 parts of second water.
Preferably, the aqueous epoxy curing agent is at least one selected from the group consisting of an aliphatic amine curing agent, an aromatic amine curing agent and a polyamide curing agent.
Preferably, the aqueous epoxy resin is at least one selected from the group consisting of bisphenol a type epoxy resin, bisphenol F type epoxy resin, and glycidyl ester type epoxy resin.
Preferably, the state of the aqueous epoxy resin is epoxy resin emulsion or 100% content water-soluble epoxy resin or epoxy resin water solution.
Preferably, the weight ratio of the waterborne epoxy resin to the waterborne epoxy curing agent is 20-40: 20-40.
Preferably, the weight ratio of the first filler, the styrene-acrylic emulsion and the first organic bentonite thickener is 10-40: 10-40: 0.1-10.
Preferably, the first filler is talc powder.
Preferably, the second filler is at least one selected from titanium dioxide, barium sulfate, talcum powder, heavy calcium carbonate and quartz powder.
As a preferable scheme, the Tg value of the styrene-acrylic emulsion is 0-30 ℃, and the solid content is 30-60%.
Preferably, the first organobentonite thickener has a higher hydrophilicity than the second organobentonite thickener.
Preferably, the first wetting dispersant is a non-ionic wetting dispersant;
preferably, the first defoaming agents are silicone defoaming agents.
The second aspect of the present invention provides a preparation method of the above-mentioned environment-friendly epoxy resin composite waterproof coating, which comprises:
preparing a component A:
uniformly mixing and stirring a first part of water, the styrene-acrylic emulsion, the first filler, the optional first wetting dispersant, the optional first defoaming agent and the first organic bentonite thickener, adding the water-based epoxy curing agent, and uniformly mixing and stirring to obtain a component A;
preparing a component B:
and (3) uniformly mixing and stirring the water-based epoxy resin, the second part of water, the second filler, the optional second wetting dispersant, the optional second defoaming agent and the second organic bentonite thickener to obtain the component B.
The third aspect of the present invention provides a construction method of the above-mentioned environment-friendly epoxy resin composite waterproof coating, which comprises:
mixing the component A and the component B according to the proportion of 1: 0.5-1.5, preferably 1: 0.8-1.2, typically 1: 1, and then brushing for use.
According to the invention, in a specific embodiment, the construction method of the environment-friendly epoxy resin composite waterproof coating can be applied to the application of waterproof construction of the back surface of home decoration, and the component A and the component B are mixed according to the proportion of 1: 1, then directly coating putty and pasting wallpaper, and if the ceramic tile is to be pasted, performing surface sanding in advance 30min after the last brushing, wherein sanding cannot be performed immediately.
In a specific embodiment, a small amount of water may be added to dilute the concrete according to construction requirements.
The fourth aspect of the present invention provides a waterproof coating formed by the above-mentioned environment-friendly epoxy resin composite waterproof coating, which comprises, in parts by weight:
20-40 parts of waterborne epoxy curing agent, 10-40 parts of styrene-acrylic emulsion, 10-40 parts of first filler, 0-10 parts of first wetting dispersant, 0-10 parts of first defoaming agent, 0.1-10 parts of first organic bentonite thickener and 20-50 parts of first water,
20-40 parts of water-based epoxy resin, 10-40 parts of second filler, 0-10 parts of second wetting dispersant, 0-10 parts of second defoaming agent, 0.1-10 parts of second organic bentonite thickener and 20-50 parts of second water.
The fifth aspect of the present invention provides a cured waterproof coating obtained by curing the waterproof coating to form a film, the cured waterproof coating comprising:
40-80 parts of water-based epoxy curing agent and water-based epoxy resin reaction condensate,
10-40 parts of styrene-acrylic emulsion, 10-40 parts of first filler, 0-10 parts of first wetting dispersant, 0-10 parts of first defoaming agent and 0.1-10 parts of first organic bentonite thickener,
10-40 parts of second filler, 0-10 parts of second wetting dispersant, 0-10 parts of second defoaming agent and 0.1-10 parts of second organic bentonite thickener.
The invention has the beneficial effects that:
the component A is a mixed system, the curing agent and the filler can be uniformly dispersed and have long-term storage stability, the filler, the styrene-acrylic emulsion and the bentonite thickener in the component A act synergistically, and the long-term stable non-layering state of the component A is a result of ternary compounding action. When in construction, A, B components are required to be mixed and stirred uniformly, a small amount of water can be added according to construction requirements, and the coating can adopt various construction modes such as roll coating, brush coating and the like. The coating is a reactive waterproof coating, and after the A, B components are mixed, the aqueous epoxy curing agent and the aqueous epoxy resin start to react, and the coating is gradually cured to form a compact waterproof film along with the volatilization of the water content of the coating and the progress of the reaction. Different from common epoxy waterproof coatings, the waterproof dry film disclosed by the invention has excellent flexibility, low water absorption rate and stable structure, the waterproof film has excellent waterproof performance on the back surface, and ultrahigh water pressure resistance, the back surface does not leak after being used for more than 1 year under high water pressure, no leakage trace appears on a coating layer, and the bonding strength of more than 3Mpa (the bonding strength of three test blocks to be tested is respectively 3.10MPa, 3.24MPa and 3.06MPa) can be still maintained after the waterproof dry film is soaked for a long time of 365 days. The waterproof coating system disclosed by the invention is excellent in safety, and can be used for scraping putty, pasting ceramic tiles, pasting wallpaper and the like on a waterproof coating by adopting a correct subsequent construction method, so that the waterproof coating system has long-term system safety after subsequent construction.
The waterproof coating can solve the problem that the conventional waterproof material has poor waterproof performance on the back surface of a building. Compared with solvent type epoxy waterproof paint, the waterproof paint disclosed by the invention is more environment-friendly. The waterproof coating comprises A, B components, wherein the main components of the component A comprise a water-based epoxy curing agent, styrene-acrylic resin, a filler, a wetting dispersant, a defoaming agent and a thickening agent, and the component B comprises a water-based epoxy resin, a filler, a defoaming agent, a wetting dispersant and a thickening agent. The styrene-acrylic resin used is styrene-acrylic resin emulsion, and the styrene-acrylic resin emulsion can only be added into the component A and cannot be added into the component B.
The waterproof coating is a waterborne styrene-acrylic resin modified epoxy resin waterproof coating, and is waterborne, environment-friendly, low in smell and free of pollution. When in use, A, B can be prepared by mixing the following two components in a weight ratio of 1: 1 stirring, mixing and coating on steel, concrete plates and wood plates. According to the embodiment, the coating adhesion strength of the material on a dry concrete base layer can reach more than 4MPa, a concrete plate coated with the waterproof coating of the embodiment is soaked in water for 12 months, and the adhesion strength of the waterproof coating still reaches more than 3 MPa.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the embodiment of the invention, the preparation method of the environment-friendly epoxy resin composite waterproof coating comprises the following steps:
preparing a component A:
mixing and stirring uniformly a first part of water, a styrene-acrylic emulsion, a first filler, a first wetting dispersant, a first defoaming agent and a first organic bentonite thickener, controlling the stirring temperature to be 20-30 ℃, the stirring speed to be 1000r/min, and the stirring time to be 10min, then adding a water-based epoxy curing agent, and mixing and stirring uniformly to obtain a component A (namely continuously stirring for 10min at the same temperature and rotation speed);
preparing a component B:
and (3) uniformly mixing and stirring the water-based epoxy resin, the second part of water, the second filler, the second wetting dispersant, the second defoaming agent and the second organic bentonite thickener, wherein the stirring temperature is controlled to be 20-30 ℃, the stirring speed is 1000r/min, and the stirring time is 10min to obtain the component B.
Comparative example preparation method reference example.
The formulations (parts by weight) of the A component and the B component of examples 1 to 2 and comparative examples 1 to 3 are shown in Table 1.
TABLE 1
The adhesive property test of the waterproof coatings prepared in the examples 1-2 and the comparative examples 1-3 is carried out by adopting a Positest pull-off method, and the test results are shown in the table 2, wherein the amount of the added styrene-acrylic resin in the example 1 is large, the strength of the material is slightly reduced, the amount of the added styrene-acrylic resin in the example 2 is moderate, and the adhesive strength of the material on various base materials is excellent.
TABLE 2
The flexibility tests were carried out on the waterproof coatings prepared in the above examples 1-2 and comparative examples 1-3, the flexibility test method was carried out according to the relevant requirements in JC/T2217-2014 standard, the test results are shown in Table 3, and the samples of example 1 and example 2 added with styrene-acrylic resin have excellent flexibility.
TABLE 3
The dry films of the waterproof coatings prepared in examples 1-2 and comparative examples 1-2 were subjected to a water absorption test for 30 days, and the test results are shown in Table 4, in which the water absorption of the dry film 1d of the coating rapidly increases and the water absorption decreases thereafter. The water absorption of the material added with the styrene-acrylic resin is improved, and the water absorption of the dry film is increased when the addition amount of the styrene-acrylic resin is increased. The water absorption rate in 7 days of example 2 is close to the water absorption rate in 30 days, which shows that the dry film of the coating in the example can reach stable water absorption rate in about 7 days, the coating film does not continue to absorb water and swell, and the dimensional stability of the coating film is better.
TABLE 4
| Water absorption Rate/% (film thickness 1mm) | 1d | 7d | 15d | 30d |
| Example 1 | 16.20 | 16.67 | 16.87 | 17.22 |
| Example 2 | 10.00 | 11.54 | 11.55 | 11.55 |
| Comparative example 1 | 7.10 | 7.49 | 7.64 | 7.82 |
| Comparative example 2 | 8.03 | 8.45 | 8.76 | 8.98 |
| Comparative example 3 | 7.57 | 7.98 | 8.23 | 8.44 |
Example 3
The embodiment provides a modified environment-friendly epoxy resin composite waterproof coating, and the preparation method is similar to that of embodiment 2, except that: the defoamer is 002 defoamer (in the chemical industry of rice and wheat), and the performances of the prepared coating are similar to those of the coating prepared in the example 2.
Example 4
The embodiment provides a modified environment-friendly epoxy resin composite waterproof coating, and the preparation method is similar to that of embodiment 2, except that: the wetting dispersant is Rohm and Haas dispersant 731a, and the performances of the prepared coating are similar to those of the coating prepared in the example 2.
Comparative example 4
The comparative example provides a modified environment-friendly epoxy resin composite waterproof coating, and the preparation method is similar to that of example 2, except that: and the thickening agents in the AB components are DE, and the prepared coating B component is layered after standing for 1 day, and the epoxy resin component and the filler are separated, separated and float on the top layer.
Comparative example 5
The comparative example provides a modified environment-friendly epoxy resin composite waterproof coating, and the preparation method is similar to that of example 2, except that: and the thickening agents in the two components AB are LT, and the component A of the prepared coating is layered after standing for 1 day, and the component A of the coating is separated from the filler to be separated out and float on the top layer.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. The environment-friendly epoxy resin composite waterproof coating is characterized by comprising A, B components:
the component A comprises the following raw materials in parts by weight:
20-40 parts of waterborne epoxy curing agent, 10-40 parts of styrene-acrylic emulsion, 10-40 parts of first filler, 0-10 parts of first wetting dispersant, 0-10 parts of first defoaming agent, 0.1-10 parts of first organic bentonite thickener and 20-50 parts of first water;
the component B comprises the following raw materials in parts by weight:
20-40 parts of waterborne epoxy resin, 10-40 parts of second filler, 0-10 parts of second wetting dispersant, 0-10 parts of second defoaming agent, 0.1-10 parts of second organic bentonite thickener and 20-50 parts of second water;
the first organobentonite thickener and the second organobentonite thickener have different hydrophilicities,
the coating film bonding strength of the environment-friendly epoxy resin composite waterproof coating on a dry concrete base layer is more than or equal to 4MPa, a concrete plate coated with the coating is soaked in water for 12 months, and the waterproof coating film bonding strength is more than or equal to 3 MPa.
2. The environment-friendly epoxy resin composite waterproof coating material according to claim 1,
the waterborne epoxy curing agent is selected from at least one of aliphatic amine curing agent, aromatic amine curing agent and polyamide curing agent;
the waterborne epoxy resin is selected from at least one of bisphenol A epoxy resin, bisphenol F epoxy resin and glycidyl ester epoxy resin;
the state of the water-based epoxy resin is epoxy resin emulsion or 100 percent water-soluble epoxy resin or epoxy resin water solution.
3. The environment-friendly epoxy resin composite waterproof coating material according to claim 1,
the weight ratio of the waterborne epoxy resin to the waterborne epoxy curing agent is 20-40: 20-40 parts of;
the weight ratio of the first filler to the styrene-acrylic emulsion to the first organic bentonite thickener is 10-40: 10-40: 0.1-10.
4. The environment-friendly epoxy resin composite waterproof coating material according to claim 1,
the first filler is talcum powder;
the second filler is selected from at least one of titanium dioxide, barium sulfate, talcum powder, heavy calcium and quartz powder;
the first wetting dispersant and the second wetting dispersant are respectively nonionic wetting dispersants;
the first defoaming agent and the second defoaming agent are respectively organic silicon defoaming agents.
5. The environment-friendly epoxy resin composite waterproof coating as claimed in claim 1, wherein the Tg value of the styrene-acrylic emulsion is 0-30 ℃ and the solid content is 30-60%.
6. The environment-friendly epoxy resin composite waterproof coating material according to claim 1,
the first organobentonite thickener has a higher hydrophilicity than the second organobentonite thickener.
7. The method for preparing the environment-friendly epoxy resin composite waterproof coating material as claimed in any one of claims 1 to 6, characterized in that the preparation method comprises the following steps:
preparing a component A:
uniformly mixing and stirring a first part of water, the styrene-acrylic emulsion, the first filler, the optional first wetting dispersant, the optional first defoaming agent and the first organic bentonite thickener, adding the water-based epoxy curing agent, and uniformly mixing and stirring to obtain a component A;
preparing a component B:
and (3) uniformly mixing and stirring the water-based epoxy resin, the second part of water, the second filler, the optional second wetting dispersant, the optional second defoaming agent and the second organic bentonite thickener to obtain the component B.
8. The construction method of the environment-friendly epoxy resin composite waterproof coating material as claimed in any one of claims 1 to 6, characterized in that the construction method comprises:
mixing the component A and the component B according to the proportion of 1: 0.5-1.5, and then brushing for use.
9. A waterproof coating layer formed by the environment-friendly epoxy resin composite waterproof coating material according to any one of claims 1 to 6, which is characterized by comprising, in parts by weight:
20-40 parts of waterborne epoxy curing agent, 10-40 parts of styrene-acrylic emulsion, 10-40 parts of first filler, 0-10 parts of first wetting dispersant, 0-10 parts of first defoaming agent, 0.1-10 parts of first organic bentonite thickener and 20-50 parts of first water,
20-40 parts of water-based epoxy resin, 10-40 parts of second filler, 0-10 parts of second wetting dispersant, 0-10 parts of second defoaming agent, 0.1-10 parts of second organic bentonite thickener and 20-50 parts of second water.
10. A cured waterproof coating obtained by curing the waterproof coating according to claim 9 into a film, the cured waterproof coating comprising:
40-80 parts of water-based epoxy curing agent and water-based epoxy resin reaction condensate,
10-40 parts of styrene-acrylic emulsion, 10-40 parts of first filler, 0-10 parts of first wetting dispersant, 0-10 parts of first defoaming agent and 0.1-10 parts of first organic bentonite thickener,
10-40 parts of second filler, 0-10 parts of second wetting dispersant, 0-10 parts of second defoaming agent and 0.1-10 parts of second organic bentonite thickener.
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| CN104194500A (en) * | 2014-09-02 | 2014-12-10 | 祁振君 | Complex water-based polymer waterproof coating and manufacturing method thereof |
| CN105368252A (en) * | 2015-11-18 | 2016-03-02 | 咸阳东方雨虹建筑材料有限公司 | Waterproof coating and preparation method and application thereof |
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