CN112961514A - Inorganic silicate as-cast finish concrete coating and preparation method and application thereof - Google Patents
Inorganic silicate as-cast finish concrete 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
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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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Abstract
The invention relates to a coating and a preparation method and application thereof. The coating comprises, by mass, 5-8% of styrene-acrylic emulsion, 5-20% of potassium silicate, 15-30% of silica sol, 15-18% of titanium dioxide, 15-20% of filler, 1.6-4.5% of auxiliary agent, 0.5-1% of organosilicon hydrophobic agent, 0.2-0.4% of color mixing paste and the balance of water; wherein the potassium silicate is silane modified potassium silicate, and the modulus is 3.5-4.0; the silica sol is subjected to a stabilization treatment. The adhesive system consists of styrene-acrylic emulsion, potassium silicate and silica sol with specific content, the silicate has better permeability, can react with a cement wall body and can permeate into a wall body base material, so that the binding force is strong, the styrene-acrylic emulsion improves the wrapping property of the coating to powder, and the potassium silicate and the silica sol have synergistic effect to improve the cohesion and the crack resistance of a coating film. The coating has good stability, and the prepared paint film has weak gloss sense and good and vivid effect of imitating the clear water concrete; and the paint film has strong binding force with the base material, is not easy to peel off and has good yellowing resistance.
Description
Technical Field
The invention relates to the technical field of architectural decoration, in particular to an inorganic silicate as-cast finish concrete coating and a preparation method and application thereof.
Background
Fair-faced concrete is an expression technique of modern architecture, and is also called decorative concrete because of its excellent decorative effect. The preparation method of the fair-faced concrete is that after the concrete is cast, no material such as coating, tile pasting, stone pasting and the like is needed, and the natural surface effect of the cast-in-place concrete is directly adopted as a facing, so that the fair-faced concrete is different from common concrete, and has the advantages of flat and smooth surface, uniform color, clear edges and corners, no damage and no pollution. Due to the unique aesthetic performance of the structure of the fair-faced concrete, the fair-faced concrete is favored by broad designers.
However, fair-faced concrete also presents a number of problems in the manufacturing process, such as: because of lack of decoration engineering after the template is removed, the quality of the concrete is roughly determined in the stage of module assembly, and the proportioning design of the concrete and the quality control of raw materials require that the proportioning of cement used by each piece of concrete is strictly consistent; the newly mixed concrete must have good workability and cohesiveness, and the phenomenon of layered segregation is not allowed to occur; the raw materials are used by the same manufacturer in the same batch as much as possible, and the color and the particles of the sand and the stone are uniform.
In addition, the cast-in-place concrete takes cement as a main inorganic binder, the cement can form a hydration process after being stirred by adding water, the hydration can generate shrinkage stress, cracks are generated on the surface of the hydrated concrete, and the risk of cracking is difficult to completely eliminate even if a water reducing agent and anti-cracking fibers are added.
The disadvantages of the conventional fair-faced concrete mainly include the following aspects: 1) the cast-in-place bare concrete has high cement base content, generates free calcium ions in the hydration process and is easy to generate the phenomenon of 'saltpetering'; 2) the cast-in-place clear concrete easily causes uneven surface color; 3) the cast-in-place fair-faced concrete is formed in one step, and is difficult to repair once flaws occur.
In order to solve the disadvantages of the fair-faced concrete, a method for imitating the effect of the fair-faced concrete by using a coating is provided. The traditional fair-faced concrete imitation method is mainly divided into two imitation systems of an organic imitation fair-faced concrete system and an inorganic dry powder facing mortar imitation fair-faced concrete system. Most of organic fair-faced concrete imitation systems are imitated by adding color paste into organic latex paint products for color mixing, and the organic fair-faced concrete imitation systems can only form a paint film on the surface of concrete, so that the binding force is weak. Over time, the common problems of the emulsion paint, such as peeling, falling, yellowing and the like, of the paint film can cause the effect of the clear water concrete imitation to be greatly reduced. And the latex paint has better sealing property of a paint film, is airtight, has stronger gloss sense of the paint film, and can cause great difference in touch, appearance and inorganic fair-faced concrete, so that the latex paint can be seen only at a distance and cannot be seen at a near distance. The inorganic dry powder facing mortar imitated clear water concrete system adopts dry powder facing mortar and toner to mix colors, the salt and alkali in the dry powder easily cause the problem of efflorescence, and the problems of color difference and stubble connection between batches are easily caused by difficulty in controlling the color mixing by the toner. Therefore, the prevention effect of two imitation systems of a general organic imitation fair-faced concrete system and an inorganic dry powder facing mortar imitation fair-faced concrete system is not ideal.
Disclosure of Invention
Based on the above, there is a need to provide an inorganic silicate fair-faced concrete imitation coating with strong binding force and good effect of fair-faced concrete imitation, and a preparation method and application thereof.
The invention provides an inorganic silicate as-cast finish concrete coating, which comprises the following components in percentage by mass:
wherein the potassium silicate is silane-modified potassium silicate, and the modulus of the potassium silicate is 3.5-4.0; stabilizing the silica sol; the pH value of the coating is 9-10.
In some embodiments, the potassium silicate is present in an amount of 5% to 10% by weight.
In some embodiments, the silica sol is present in an amount of 15 to 20% by weight.
In some of the embodiments, the content of the styrene-acrylic emulsion is 6% by mass; the content of the potassium silicate is 5 percent; the content of the silica sol was 15%.
In some of these embodiments, the styrene-acrylic emulsion has a minimum film forming temperature of no greater than 5 ℃.
In some of these embodiments, the titanium dioxide is rutile.
In some of these embodiments, the filler is selected from at least one of heavy calcium carbonate and quartz powder.
In some embodiments, the assistant comprises the following components in percentage by mass of the inorganic silicate as the water-clear imitation concrete coating:
in another aspect of the present invention, a preparation method of the inorganic silicate as-cast finish concrete coating is provided, which comprises the following steps:
taking the components of the inorganic silicate as the water-imitation concrete coating for later use;
stirring and mixing a proper amount of water and the auxiliary agent to form a colloidal substance;
adding the titanium dioxide and the filler into the colloidal substance, and grinding;
adding the styrene-acrylic emulsion and uniformly mixing;
sequentially adding the potassium silicate, the silica sol, the organic silicon hydrophobic agent and the rest water, and uniformly mixing;
and adding the color paste to obtain the inorganic silicate as-cast finish concrete coating.
In another aspect of the invention, the application of the inorganic silicate as the imitation fair-faced concrete coating as the imitation fair-faced concrete is also provided.
The inorganic silicate as-cast finish concrete coating comprises styrene-acrylic emulsion, potassium silicate, silica sol, titanium dioxide, filler, auxiliary agent, organic silicon hydrophobic agent toning color paste, water and an organic-inorganic bonding system consisting of the styrene-acrylic emulsion, the potassium silicate and the silica sol with specific contents. The coating has good stability, and the prepared paint film has weak gloss sense and good and vivid effect of imitating the clear water concrete; and the paint film has strong binding force with the base material, is not easy to peel off and has good yellowing resistance.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the following description. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
The weight of the related components mentioned in the description of the embodiments of the present invention may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present invention as long as it is in accordance with the description of the embodiments of the present invention. Specifically, the weight described in the description of the embodiments of the present invention may be a unit of weight known in the chemical industry, such as μ g, mg, g, and kg.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The invention provides an inorganic silicate as-cast finish concrete coating, which comprises the following components in percentage by mass:
wherein the potassium silicate is silane-modified potassium silicate, and the modulus of the potassium silicate is 3.5-4.0; stabilizing the silica sol; the pH of the coating is 9-10.
The potassium silicate has good water resistance, is not easy to salt out, has low cost and is particularly suitable for being applied to wall coatings. The silane modified potassium silicate is prepared by connecting organic groups to silicon atoms in the potassium silicate and properly reducing the number of active functional groups of the potassium silicate, so that the reaction activity of the potassium silicate is reduced, the potassium silicate is not easy to generate dehydration condensation self-polymerization reaction, the viscosity is stable when the potassium silicate is applied to a coating, gelation is not easy to generate, the potassium silicate has good compatibility with an organic emulsion, and flocculating particles are not easy to generate. The silane-modified potassium silicate can generate binding power, and can permeate into the interior of the cement matrix through capillary action to be mixed with Ca (OH) in the cement matrix2Reaction is carried out to generate CaSiO with adhesive property3The gel and potassium silicate are subjected to condensation polymerization to form a-Si-O-Si-net skeleton gel structure with a chemical composition of silicon dioxide, so that strong adhesive force and sealing effect are generated on a base material, and the coating film has the advantages of good air permeability, porosity, matte property and the like.
The inorganic silicate as-cast finish concrete coating has high potassium silicate modulus of 3.5-4.0. The low-modulus potassium silicate solution has low silicate polymerization degree, small molecular weight, high reactivity, stronger binding power and better stability, and has lower viscosity under the same solid content, but slower curing speed and poor water resistance. Meanwhile, the salting-out and whitening phenomena are more likely to occur because of the high content of alkali metal ions and strong alkalinity. And the potassium silicate solution with the modulus of 3.5-4.0 has high polymerization degree of silicate ions, large molecular weight, high curing speed, good water resistance, small alkalinity, less salting-out and whitening phenomena and good chemical stability of a coating film. However, the viscosity is high, so that a solution with high solid content is difficult to form, the reaction activity is low, cracking and powder falling are easy to occur, and the stability of the coating is slightly poor. In the embodiment of the invention, the potassium silicate is K100 potassium silicate which is Australian Shanghai.
The organic group is connected on part of active silanol group of the silica sol after stabilization treatment, so that the reaction activity of the silica sol is reduced. The silica sol is added into the potassium silicate solution, so that the problem of easy cracking and powder falling of high-modulus potassium silicate can be solved, and the strength and the crack resistance of a coating film are improved. In the embodiment of the present invention, as the silica sol, S308 in australia, shanghai was used.
The styrene-acrylic emulsion is an organic resin emulsion, has good alkali resistance and lower water absorption, and has better compatibility with silicate under the alkaline condition.
The silicone hydrophobe is an aqueous, solvent-free silicone-modified organic emulsion. The polysiloxane solution modified by the organic silicon resin is a waterproof additive for manufacturing water-based exterior wall coatings and water-based primers, can enhance the water resistance and water resistance of the coatings, keeps good air permeability, improves the construction performance of the water-based coatings, and plays a role in resisting caking.
The color mixing paste can adjust the color tone of the coating, is closer to the bare concrete and has better imitation effect.
The inorganic silicate as-cast finish concrete coating comprises an organic-inorganic bonding system consisting of styrene-acrylic emulsion, potassium silicate, silica sol, titanium dioxide, filler, an auxiliary agent, an organic silicon hydrophobic agent, color mixing paste and water and specific contents of the styrene-acrylic emulsion, the potassium silicate and the silica sol, wherein the inorganic silicate has better permeability and can permeate into a wall base material to have strong binding force when reacting with a concrete wall, the styrene-acrylic emulsion improves the wrapping property of the coating on powder, and the potassium silicate and the silica sol have synergistic action to improve the cohesion and the crack resistance of a coating film. The coating has good stability, and the prepared paint film has weak gloss sense and good and vivid effect of imitating the clear water concrete; and the paint film has strong binding force with the base material, is not easy to peel off and has good yellowing resistance.
In some of the examples, the potassium silicate is present in an amount of 5% to 10% by weight.
In some of the examples, the silica sol is present in an amount of 15 to 20% by mass.
In some of the examples, the styrene-acrylic emulsion content was 6% by mass; the content of potassium silicate is 5 percent; the content of silica sol was 15%. Under the composition, the inorganic silicate as-cast finish concrete coating has good compatibility of color paste, good integral dispersibility of the coating, difficult cracking of a coating film, and better crack resistance and stain resistance.
In some of these embodiments, the styrene-acrylic emulsion has a minimum film forming temperature of no greater than 5 ℃. The styrene-acrylic emulsion at the film forming temperature can form a film under various weather conditions, and is beneficial to the overall film forming of the coating, so that a film forming auxiliary agent is not required to be additionally added.
In some of these embodiments, the titanium dioxide is rutile. The rutile type titanium dioxide has good stability. Furthermore, the rutile type titanium dioxide is organically modified by silicon oxide, aluminum oxide and the like. The modified rutile titanium dioxide has better dispersibility and stability in an aqueous system and good weather resistance.
In some of these embodiments, the filler is selected from at least one of heavy calcium carbonate and quartz powder.
In some of these embodiments, the tinting color paste is selected from at least one of an iron black color paste, a carbon black color paste, and an iron yellow color paste. Preferably, the color-mixing color paste is a mixture of iron black color paste and iron yellow color paste.
In some embodiments, the inorganic silicate as-cast finish concrete coating comprises the following components in percentage by mass:
the coating formed by the components has smooth construction, good washing and brushing resistance and stain resistance, and good effect of imitating fair-faced concrete.
In some embodiments, the auxiliary agent comprises the following components in percentage by mass of the inorganic silicate as the water-clear imitation concrete coating:
in some of these embodiments, the defoamer is a mineral oil type defoamer.
In some of these embodiments, the dispersant is a polyacrylate dispersant.
In some of these embodiments, the wetting agent is an alkyl polyoxyethylene ether-based wetting agent.
In some of these embodiments, the thickener is a cellulosic thickener.
In some embodiments, the auxiliary agent further comprises a film-forming auxiliary agent 0.5-1% by mass. Further, a decaglycol ester was used as the film-forming aid.
In some of these embodiments, the antifreeze agent is propylene glycol.
The invention also provides a preparation method of the inorganic silicate as-cast finish concrete coating, which comprises the following steps of S1-S6.
Step S1: taking the components of the inorganic silicate as the water-imitation concrete coating for standby.
Step S2: mixing appropriate amount of water and adjuvant under stirring to obtain colloidal substance.
Step S3: adding titanium dioxide and filler into the colloidal substance, and grinding.
Step S4: continuously adding the styrene-acrylic emulsion and uniformly mixing.
Step S5: and continuously and sequentially adding the potassium silicate, the silica sol, the organic silicon hydrophobing agent and the rest water, and uniformly mixing.
Step S6: and continuously adding the color mixing paste to obtain the inorganic silicate as-cast finish concrete coating.
The preparation method of the inorganic silicate as-cast finish concrete coating is simple in preparation process, and the obtained coating is good in dispersibility and stability. The formed paint film has firm combination, is not easy to age and peel, has weak luster, presents the color tone of concrete, and has good effect of imitating as-cast finish concrete.
In some embodiments, the stirring speed of step S2 is 300rpm to 500 rpm.
In some embodiments, the rotation speed of the grinding in the step S3 is 2000rpm to 3000rpm, and the grinding time is 20min to 25 min.
In some embodiments, in step S4, the mixture is blended at a rotation speed of 800rpm to 1200 rpm.
In some embodiments, in step S5, the mixture is blended at a rotation speed of 800rpm to 1200 rpm.
The invention also provides application of the inorganic silicate as-cast finish concrete coating in preparation of as-cast finish concrete.
In some embodiments, the inorganic silicate imitation fair-faced concrete paint can be used as a main paint and a clap paint for imitation fair-faced concrete.
In order to make the objects, technical solutions and advantages of the present invention more concise and clear, the present invention is described with the following specific embodiments, but the present invention is by no means limited to these embodiments. The following described examples are only preferred embodiments of the present invention, which can be used to describe the present invention and should not be construed as limiting the scope of the present invention. It should be understood that any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
The present invention will be further illustrated with reference to the following examples. The following are specific examples.
In the following examples, the embodiments of the imitation fair-faced concrete are as follows: the cement base material is coated with transparent penetrating primer, main paint, patting paint and reinforcing finish paint successively. The main paint provides the main color tone of the simulated clear water concrete, and the patting paint modifies the texture of the coating of the simulated clear water concrete by patting and rubbing.
In the following examples, the formulation of 100% clear penetrating primer was: 837 styrene-acrylic emulsion 10%, mineral oil defoamer 0.1%, K100 potassium silicate 28% and water the rest.
The proportion of the reinforced finishing coating is as follows: 837 styrene-acrylic emulsion 10%, mineral oil defoamer 0.1%, K100 potassium silicate 38% and water the rest.
The proportion of the patting coating is completely consistent with that of the main coating.
The main paint ratios (% by weight) of examples and comparative examples are shown in tables 1 and 2.
TABLE 1
TABLE 2
The coatings of examples 1-5 and comparative examples 1-8 were prepared as follows:
adding water into a dispersion cylinder, adding a dispersing agent, a wetting agent, a defoaming agent, a film-forming aid, an antifreezing agent, a thickening agent, a mildew preventive, a pH regulator and other aids, and stirring and mixing at 400rpm to form a colloidal substance.
Titanium dioxide and filler are added into a dispersion cylinder, and the mixture is pulped and ground for 25 minutes at the rotating speed of 2500rpm until the fineness is 50 mu m.
Adding the styrene-acrylic emulsion into a dispersion cylinder, and uniformly mixing at 1000 rpm.
Sequentially adding potassium silicate solution, silica sol, organic silicon hydrophobing agent and the rest water into a dispersion cylinder, uniformly mixing at 1000rpm, and then adding carbon black color paste and iron yellow color paste.
The results of the tests of the clear water-like concretes prepared in examples 1 to 5 were shown in Table 3, respectively, according to the standard JG/T26-2002 for inorganic coatings of exterior walls.
TABLE 3
The main coatings provided in examples 1 to 5 and comparative examples 1 to 8 were used to test performance according to JG/T26-2002, with emphasis on scrub resistance, stain resistance, workability, and appearance. The test results are shown in Table 4.
TABLE 4
Referring to tables 1 and 2, the above test results show that the inorganic silicate as-cast finish concrete coatings prepared in examples 1 to 3 have substantially no abnormal workability, a contrast ratio of more than 0.95, a scrub resistance of more than 6000 times, no abnormal low-temperature storage, a stain resistance of less than 20, an artificial aging resistance of 1000 hours, a powdering resistance of less than 1 grade, a discoloration resistance of less than 2 grade, i.e., very slight powdering and slight discoloration.
Compared with the example 1, the content of the potassium silicate in the inorganic silicate as the water-imitation concrete coating of the example 4 is increased, other properties are not obviously changed, and a coating film has a good water-imitation concrete effect but poor stain resistance. The content of silica sol in the coating of example 5 is increased, other properties are not obviously changed, and the coating film has good effect of imitating as-cast finish concrete, but the pulverization is less than 2 grade and the discoloration is less than 2 grade in an artificial aging resistance test for 1000h, namely slight pulverization and slight discoloration.
In comparison with example 1, the coating materials of comparative examples 1 to 8 were adjusted in the contents of styrene-acrylic emulsion, potassium silicate and silica sol. The coatings of comparative examples 1 to 8 are deficient in film-forming property, cohesive force to powder or stain resistance, and especially do not achieve good effect of imitation fair-faced concrete basically in appearance.
Specifically, comparative example 1 does not add styrene-acrylic emulsion, and the coating film prepared has lower times of washing and brushing resistance and has dusty surface. Compared with the comparative example 6, 12 percent of styrene-acrylic emulsion is added, although the workability, the scrubbing resistance and the stain resistance are not obviously influenced, the coating film has stronger lustrous appearance and can not achieve the effect of imitating the clear water concrete.
Comparative example 2 no potassium silicate was added and the resulting coating had a lower number of scrub resistant coatings and a slightly cracked film. In contrast, comparative example 7, in which 25% of potassium silicate was added, had poor workability, scrub resistance and appearance, but had poor stain resistance.
Comparative example 3 no silica sol was added, and the obtained coating had a powdery surface, uneven color, blooming and poor imitation. The coating of example 8, to which 35% silica sol was added, had poor film-forming properties, and the paint film was slightly cracked and had poor stain resistance.
Comparative examples 4 to 5 only used a single bonding system of potassium silicate or silica sol, and the coating films were not good in various degrees of scrub resistance, stain resistance and appearance properties.
The inorganic silicate as-cast finish concrete coating needs to be combined, the cohesion and the strength of a coating film are improved through the synergistic effect of the inorganic silicate as-cast finish concrete coating, the scrubbing resistance is improved, the internal stress is reduced, the cracking risk is reduced, and the contamination resistance is improved through the complementary effect of potassium silicate and silica sol.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The inorganic silicate as-cast finish concrete imitation coating is characterized by comprising the following components in percentage by mass:
wherein the potassium silicate is silane-modified potassium silicate, and the modulus of the potassium silicate is 3.5-4.0; stabilizing the silica sol; the pH value of the coating is 9-10.
2. The inorganic silicate as clear water imitation concrete coating as claimed in claim 1, wherein the content of the potassium silicate is 5-10% by mass.
3. The inorganic silicate as clear water imitation concrete coating as claimed in claim 1, wherein the content of the silica sol is 15-20% by mass.
4. The inorganic silicate as clear water imitation concrete coating as claimed in claim 1, wherein the content of the styrene-acrylic emulsion is 6% by mass; the content of the potassium silicate is 5 percent; the content of the silica sol was 15%.
5. The inorganic silicate as clear water imitation concrete coating of claim 1, wherein the minimum film forming temperature of the styrene-acrylic emulsion is not higher than 5 ℃.
6. The inorganic silicate as clear water imitation concrete coating as claimed in any one of claims 1 to 5, wherein the titanium dioxide is rutile type.
7. The inorganic silicate as clear water imitation concrete coating of any one of claims 1 to 5, wherein the filler is at least one selected from heavy calcium carbonate and quartz powder.
8. The inorganic silicate as clear water imitation concrete coating as claimed in any one of claims 1 to 5, wherein the assistant comprises the following components in percentage by mass:
9. a preparation method of an inorganic silicate as-cast finish concrete coating is characterized by comprising the following steps:
taking the components of the coating of any one of claims 1 to 8 for later use;
stirring and mixing a proper amount of water and the auxiliary agent to form a colloidal substance;
adding the titanium dioxide and the filler into the colloidal substance, and grinding;
adding the styrene-acrylic emulsion and uniformly mixing;
sequentially adding the potassium silicate, the silica sol, the organic silicon hydrophobic agent and the rest water, and uniformly mixing;
and adding the color paste to obtain the coating.
10. Use of the inorganic silicate as defined in any one of claims 1 to 8 as a coating for imitating fair-faced concrete.
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| CN113698804A (en) * | 2021-09-13 | 2021-11-26 | 沈阳先进涂层材料产业技术研究院有限公司 | Crack-resistant and water-resistant all-inorganic coating and preparation method thereof |
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| CN115491071B (en) * | 2022-08-31 | 2024-02-20 | 陕西瑞盾建筑工程有限公司 | Processing material of bare concrete facing and preparation method of bare concrete facing |
| CN115948063A (en) * | 2022-10-19 | 2023-04-11 | 昆明理工大学 | Silicate modified silica sol-based water-based inorganic coating |
| CN115851012A (en) * | 2022-12-19 | 2023-03-28 | 珠海市派特尔科技股份有限公司 | Air self-cleaning inorganic coating with antibacterial property under visible light |
| CN115948084B (en) * | 2023-02-13 | 2023-11-07 | 南京工业大学 | Self-cleaning organic-inorganic hybrid waterproof coating for concrete and preparation method thereof |
| CN115948084A (en) * | 2023-02-13 | 2023-04-11 | 南京工业大学 | Concrete self-cleaning organic-inorganic hybrid waterproof coating and preparation method thereof |
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