CN112126259A - Method for preparing inorganic waterproof coating by using activity of alkali-activated mineral powder - Google Patents
Method for preparing inorganic waterproof coating by using activity of alkali-activated mineral powder Download PDFInfo
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- CN112126259A CN112126259A CN202011058825.0A CN202011058825A CN112126259A CN 112126259 A CN112126259 A CN 112126259A CN 202011058825 A CN202011058825 A CN 202011058825A CN 112126259 A CN112126259 A CN 112126259A
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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
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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
- C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
- C09D1/04—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates 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
- 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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- 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
- C09D7/65—Additives macromolecular
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- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
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Abstract
The invention relates to a method for preparing inorganic waterproof paint by using alkali-activated mineral powder activity, which is prepared by uniformly mixing mineral powder, water glass and water as base materials, titanium dioxide, light calcium powder and quartz powder as fillers, polyvinyl alcohol and redispersible latex powder as auxiliaries according to a certain proportion. The coating provided by the invention takes the alkali-activated cementing material as a film forming material of the inorganic coating, does not contain harmful substances such as organic volatile matters and heavy metals, and has the advantages of simple process, environmental protection, low cost and the like. Experimental results show that the bonding strength, water resistance, alkali resistance, temperature change resistance and artificial aging resistance of the coating all reach the relevant standards of inorganic exterior wall coatings, and the coating has good popularization and application prospects.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a method for preparing an inorganic waterproof coating by utilizing the activity of alkali-activated mineral powder.
Background
The rapid development of the global steel industry and the continuous increase of the usage amount of coal resources cause the slag to become an industrial byproduct with huge yield. If a large amount of blast furnace slag is not treated in time, the blast furnace slag is likely to pollute the atmosphere (such as haze), and in addition, the slag stacked for a long time can seriously erode the land, pollute the soil and infiltrate into underground water to pollute rivers and lakes.
The slag is dried and ground into mineral powder, and has good hydraulic activity under the action of an alkaline excitant or a sulfate excitant, so that the prepared alkali-activated slag cementing material has the advantages of simple production process, low cost, quick setting time, high strength, good durability and the like, and is concerned by domestic and foreign scholars. The method of adopting industrial byproducts as raw materials in engineering construction meets the relevant requirements of building an environment-friendly and green developing society in China and has better development prospect.
On the basis, the invention takes the water glass as an alkaline excitant, utilizes the potential activity of the excited mineral powder to generate an inorganic gelled substance as a base material of the inorganic coating, and then mixes a proper amount of pigment, filler and auxiliary agent to prepare the alkali-excited mineral slag inorganic coating.
Disclosure of Invention
The invention aims to solve the problems that the porosity of silicate gel is too high after the traditional inorganic waterproof coating is cured and the durability of a coating such as water resistance, frost resistance and the like is poor caused by the porosity, and develops the alkali-activated mineral powder inorganic waterproof coating. The coating can be directly combined with a cement concrete wall surface, and has the advantages of high bonding strength, good water resistance and the like. In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for preparing inorganic waterproof paint by using activity of alkali-activated mineral powder comprises the following specific steps: mixing the mineral powder, the water glass, the water, the filler and the auxiliary agent in proportion, and stirring uniformly.
Further, the formula of the raw materials in parts by weight is as follows: 50 parts of mineral powder, 15-25 parts of water glass, 20-30 parts of water, less than or equal to 10 parts of filler and 0.4-1 part of assistant.
Further, the mineral powder is fine powder obtained by grinding granulated blast furnace slag, and the specific surface area of the fine powder is 425m2More than kg. The fineness of the ore powder is mainly screened to ensure the activity of the ore powder and ensure the reaction to be more thorough.
Further, the water glass is specifically sodium silicate water glass with a modulus of 1.0-1.8. Experiments show that only the water glass within the modulus range can provide a proper alkaline environment to ensure effective hydration of the mineral powder and ensure the operation time of the coating.
Further, the filler is selected from at least one of titanium dioxide, light calcium powder and quartz powder.
Furthermore, the titanium dioxide is powder with a particle size of over 1250 meshes, the light calcium powder is powder with a particle size of over 600 meshes, and the quartz powder is powder with a particle size of over 400 meshes. The granularity of the filler powder is screened, so that the filler powder is bright in color and filling effect, and is matched with the mineral powder better.
Further, the auxiliary agent is selected from at least one of polyvinyl alcohol and redispersible latex powder. The polyvinyl alcohol powder and the redispersible latex powder mainly play a thickening role so as to improve the cohesive capability of the paint.
Further, the stirring time after the raw materials are mixed is 10-20 min.
Further, the inorganic waterproof coating is specifically an exterior wall coating.
It is another object of the present invention to provide a coating prepared according to the above method.
The curing mechanism of the coating is that the activity of alkali-activated mineral powder is utilized to disperse and destroy the vitreous structure on the surface of the mineral powder, so that hydrated calcium silicate gel and zeolite inorganic products are generated, and the structure of the formed cured body is more compact. The film forming material of the inorganic coating is hydration product C-S-H gel of alkali-activated mineral powder cementing material, and has the advantages of high density and strength, good water resistance and aging resistance, and the like. The film forming substance is the same as the hydration product of the cement concrete material of the outer wall, can generate higher bonding strength after being combined with the wall surface, and is not easy to have the problems of surface falling, warping and the like.
Compared with the prior art, the beneficial effects of the invention are mainly embodied in the following aspects: (1) the raw materials are cheap and easy to obtain, the formula is simple, the preparation is easy, and the cost is low; (2) the proportion of the mineral powder in the coating is high, the consumption of the coating as an exterior wall coating is high, and the coating has a remarkable promoting effect on recycling of slag and mineral powder with huge yield; (3) the alkali-activated mineral powder is used as a base material of the inorganic coating, the density of a film-forming substance obtained by curing is good, and the water resistance and the durability of the coating are improved; (4) the paint can be directly constructed on a cement concrete wall surface, the paint is more firmly combined with the wall surface, the surface quality of the coating is better, and the paint is high in glossiness, non-toxic and environment-friendly.
Detailed Description
In order to make those skilled in the art fully understand the technical solutions and advantages of the present invention, the following embodiments are further described.
The invention utilizes the alkalinity provided by the alkali activator water glass to dissolve the vitrous substances on the surface of the mineral powder, so that the active CaO and Al are generated2O3With OH in the liquid phase-Reaction to produce AlO2 -、Ca2+And [ SiO ]4]4-Further, C-S-H gel and ettringite are formed, and a film-forming material having good compactness obtained by the formation of C-S-H gel and ettringite imparts good durability to the coating material. In addition, the C-S-H gel generated by the reaction of the active ingredients depolymerized by the alkali-activated mineral powder on the cement substrate side rivets the coating and the substrate, so that the connecting structure of the coating and the cement substrate is more compact.
Example 1
An alkali-activated mineral powder inorganic waterproof coating comprises the following formula: specific surface area 425m2More than 50 parts of mineral powder per kg, 20 parts of sodium silicate with the modulus of 1.4, 20 parts of water, 4.5 parts of titanium dioxide with the granularity of more than 1250, 4.5 parts of quartz powder with the granularity of more than 400, 0.5 part of polyvinyl alcohol powder and 0.5 part of redispersible latex powder. Accurately weighing the raw materials, and then uniformly mixing and stirring the raw materials for 10 minutes to obtain the building exterior wall construction material.
Example 2
An alkali-activated mineral powder inorganic waterproof coating comprises the following formula: the specific surface area is 425m2More than 50 parts of mineral powder per kg, 15 parts of sodium silicate with the modulus of 1.0, 25 parts of water, 4.5 parts of titanium dioxide with the granularity of more than 1250, 4.5 parts of light calcium powder with the granularity of more than 600, 0.5 part of polyvinyl alcohol powder and 0.5 part of redispersible latex powder. Accurately weighing the raw materials, and then uniformly mixing and stirring the raw materials for 10 minutes to obtain the building exterior wall construction material.
Example 3
An alkali-activated mineral powder inorganic waterproof coating comprises the following formula: the specific surface area is 425m2More than 50 parts of mineral powder per kg, 15 parts of sodium silicate with the modulus of 1.0, 25 parts of water, 9 parts of titanium dioxide with the particle size of more than 1250 meshes, 0.5 part of polyvinyl alcohol powder and 0.5 part of redispersible latex powder. Accurately weighing the raw materials, and then uniformly mixing and stirring the raw materials for 10 minutes to obtain the building exterior wall construction material.
In order to fully understand the performance of the exterior wall coating prepared in examples 1-3, the water resistance, alkali resistance, temperature change resistance, artificial aging resistance and bonding strength of the exterior wall coating are tested according to the test method of GB10222-88 inorganic building coating for exterior walls, and the test results are shown in Table 1.
TABLE 1 comparison of the properties of the various groups of coatings obtained in the examples
As can be seen from Table 1, the inorganic exterior wall coatings prepared in examples 1-3 have no foaming, cracking, peeling or discoloration after testing for a specified period of time, and are 100% qualified, and the coating has a bonding strength of not less than 0.49MPa and 100% qualified.
The invention uses an alkali-activated system as a base material of the coating, so the water-cement ratio (ensuring the fluidity, viscosity and hydrated strength of slurry) and the water glass modulus (ensuring the hydrolysis of an alkali activator [ SiO4 ]]4-With OH-To achieve double excitation effect on the mineral powder) and the alkali mixing amount (hydrolyzing a proper amount of OH-The glass phase on the surface of the disintegrated mineral powder promotes the hydration of the mineral powder) is very critical to the influence of the performance of the coating. Therefore, the following two groups of comparative examples are carried out under other conditions, and the importance of the selection of the value ranges of the parameters is proved.
Comparative example 1
An alkali-activated mineral powder inorganic waterproof coating comprises the following formula: the specific surface area is 425m250 parts of ore powder (the source is the same as that in example 1-3, other powder is the same as that in example 1-3)15 portions of 0.6 modulus sodium silicate, 25 portions of water, 9 portions of 1250-mesh titanium dioxide, 0.5 portion of polyvinyl alcohol powder and 0.5 portion of redispersible latex powder. Accurately weighing the raw materials, and then uniformly mixing and stirring the raw materials for 10 minutes to obtain the building exterior wall construction material.
Table 2 comparison of the properties of the coating compositions of comparative example 1
As can be seen from Table 2, when the sodium silicate raw material is selected incorrectly, the exterior wall coating product with the performance up to the standard can not be obtained.
Comparative example 2
An alkali-activated mineral powder inorganic waterproof coating comprises the following formula: the specific surface area is 425m2More than 50 parts of mineral powder per kg, 15 parts of sodium silicate with the modulus of 1.0, 25 parts of water, 0.5 part of polyvinyl alcohol powder and 0.5 part of redispersible latex powder. Accurately weighing the raw materials, and then uniformly mixing and stirring the raw materials for 10 minutes to obtain the building exterior wall construction material.
TABLE 3 comparison of the properties of the coating compositions of comparative example 2
As can be seen from Table 3, improper filler levels also result in failure to produce acceptable exterior wall coatings because the incorporation of fillers, in addition to improving the color of the coating, can affect the aging properties of the product.
Claims (9)
1. The method for preparing the inorganic waterproof coating by using alkali to excite the activity of the mineral powder is characterized by comprising the following steps of: mixing the mineral powder, the water glass, the water, the filler and the auxiliary agent in proportion, and then uniformly stirring.
2. The method of claim 1, wherein the raw materials comprise, in parts by weight: 50 parts of mineral powder, 15-25 parts of water glass, 20-30 parts of water, less than or equal to 10 parts of filler and 0.4-1 part of assistant.
3. The method of claim 1 or 2, wherein: the mineral powder is specifically fine powder obtained by grinding granulated blast furnace slag, and the specific surface area of the fine powder is 425m2More than kg.
4. The method of claim 1, wherein: the water glass is specifically sodium silicate water glass with a modulus of 1.0-1.8.
5. The method of claim 1, wherein: the filler is at least one of titanium dioxide, light calcium powder and quartz powder.
6. The method of claim 5, wherein: the titanium dioxide is powder with over 1250 meshes, the light calcium powder is powder with over 600 meshes, and the quartz powder is powder with over 400 meshes.
7. The method of claim 1, wherein: the auxiliary agent is at least one of polyvinyl alcohol and redispersible latex powder.
8. The method of claim 1, wherein: the stirring time after the raw materials are mixed is 10-20 min.
9. The method of claim 1, wherein: the inorganic waterproof coating is specifically an exterior wall coating.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011058825.0A CN112126259A (en) | 2020-09-30 | 2020-09-30 | Method for preparing inorganic waterproof coating by using activity of alkali-activated mineral powder |
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| CN202011058825.0A CN112126259A (en) | 2020-09-30 | 2020-09-30 | Method for preparing inorganic waterproof coating by using activity of alkali-activated mineral powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116253536A (en) * | 2023-01-10 | 2023-06-13 | 深圳大学 | Alkali-activated geopolymer coating and preparation method and application thereof |
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| KR20080098252A (en) * | 2007-05-04 | 2008-11-07 | 이인자 | Functional inorganic paint and preparing method of functional furniture board using the same |
| CN106145790A (en) * | 2016-06-20 | 2016-11-23 | 王聚会 | A kind of breeze base inorganic polymeric coating and preparation method |
| CN109294291A (en) * | 2018-09-06 | 2019-02-01 | 南京工业大学 | A kind of slag-based water building outer wall coating material |
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2020
- 2020-09-30 CN CN202011058825.0A patent/CN112126259A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080098252A (en) * | 2007-05-04 | 2008-11-07 | 이인자 | Functional inorganic paint and preparing method of functional furniture board using the same |
| CN106145790A (en) * | 2016-06-20 | 2016-11-23 | 王聚会 | A kind of breeze base inorganic polymeric coating and preparation method |
| CN109294291A (en) * | 2018-09-06 | 2019-02-01 | 南京工业大学 | A kind of slag-based water building outer wall coating material |
Non-Patent Citations (2)
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| JOHN L.PROVIS: "《碱激发材料》", 31 January 2019 * |
| 赵云龙等: "《石膏干混建材生产及应用技术》", 30 November 2016, 中国建材工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116253536A (en) * | 2023-01-10 | 2023-06-13 | 深圳大学 | Alkali-activated geopolymer coating and preparation method and application thereof |
| CN116253536B (en) * | 2023-01-10 | 2024-01-09 | 深圳大学 | Alkali-activated geopolymer coating and preparation method and application thereof |
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Application publication date: 20201225 |