CN112608121A - Gypsum board surface treating agent and preparation method thereof - Google Patents
Gypsum board surface treating agent and preparation method thereof Download PDFInfo
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- CN112608121A CN112608121A CN202011496429.6A CN202011496429A CN112608121A CN 112608121 A CN112608121 A CN 112608121A CN 202011496429 A CN202011496429 A CN 202011496429A CN 112608121 A CN112608121 A CN 112608121A
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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
- C04B28/24—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 containing alkyl, ammonium or metal silicates; containing silica sols
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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
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
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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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00517—Coating or impregnation materials for masonry
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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
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Finishing Walls (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
Abstract
The invention is suitable for the technical field of materials, and provides a gypsum board surface treating agent and a preparation method thereof, wherein the treating agent adopts a filler compounded by modified loess, epoxy resin, ethyl acrylate and glycerol according to a specific proportion, and is compounded with other components, so that the prepared surface treating agent is easy to push away and coat on the surface of the gypsum board, the treatment efficiency is improved, air holes and pores on the surface of the gypsum board can be well filled, the curing time is short, the surface of the gypsum board can be smoother and smoother after curing, the binding force with the gypsum board is strong, the gypsum board is not easy to fall off after long-term use, the decorative beautification subsequently coated on the surface of the gypsum board can form a continuous and beautiful decorative surface, and the commercial value of the wall brick is improved.
Description
Technical Field
The invention belongs to the technical field of materials, and particularly relates to a gypsum board surface treating agent and a preparation method thereof.
Background
The ceramic tile is used as a building decoration material, and not only can be used for decorating buildings to ensure that the buildings are beautiful and gorgeous; moreover, the tile layer is adhered to the surface of the building, so that the erosion of the external environment to the surface of the building can be isolated, and the building is more durable. The super-clean and bright technology is a high-precision ceramic tile surface treatment method which is generally adopted at present, and the method comprises the steps of repeatedly applying pressure, grinding and polishing to a ceramic tile through a polishing grinding head, so that nano particles in nano liquid better penetrate into pores of the polished ceramic tile, the pores and micro cracks of the ceramic tile are blocked, and a special and continuous nano film is formed, so that the ceramic tile has a bright and uniform surface.
As the ceramic production is an industry with high energy consumption and high pollution, the production process is contrary to the aims of low consumption and innovation advocated by the state, and a novel wall brick without blank sintering is produced in response to the national call and the development and innovation. The wall brick is made by coating resin pattern on the surface of artificial pressed simple plaster board, and then solidifying the surface for decoration. However, the gypsum board has uneven and porous surface, so that a plurality of pores and pores are easily generated after the surface glaze body is solidified, so that the resin patterns coated on the surface of the gypsum board are uneven, the aesthetic feeling of the appearance of the wall brick is influenced, and the commercial value of the wall brick is reduced; in addition, due to the pores, gaps are reserved between the coated resin patterns and the surface of the gypsum board, and external water vapor and the like are easy to invade, so that the bonding force between the resin patterns is reduced, and the resin patterns are easy to fall off.
However, in the current common mode, a layer of powder paste is coated on the surface of the gypsum board to fill pores and pores generated by the powder paste, so that the surface of the gypsum board becomes flat, and thus, resin patterns can form a continuous and beautiful decorative surface on the surface of the gypsum board, and the decorative effect is improved.
Disclosure of Invention
The embodiment of the invention provides a gypsum board surface treating agent, aiming at solving the problems of insufficient bonding force and poor hole repairing effect of the existing powder paste and gypsum board.
The embodiment of the invention is realized by adopting the gypsum board surface treating agent, wherein the gypsum board surface treating agent is prepared from silica colloid, ethylene glycol, an organic silane coupling agent, a surfactant, a filler, a leveling agent and a whitening agent according to the mass ratio of 25-70: 0.1-1: 0.1-1.2: 0.1-1.5: 3-15: 0.5-2: 0.1-0.3;
wherein, the filler is prepared by the following steps:
mixing loess, montmorillonite and attapulgite according to a mass ratio of 10-12: 5:8 to obtain a loess mixture;
slowly adding a mixed acid solution into the loess mixture while stirring, wherein the liquid-solid ratio of the loess mixture to the mixed acid solution is 1: 13-15, and obtaining acidified loess;
roasting the acidified loess at the temperature of 550-600 ℃ for at least 30min, taking out and cooling, and grinding the acidified loess into particles with the particle size of 20-30 nm to obtain modified loess;
the modified loess, the epoxy resin, the ethyl acrylate and the glycerol are mixed according to the mass ratio of 1-5: 30-45: 20-25: 6-18, and mixing uniformly to obtain the filler.
The embodiment of the invention also provides a preparation method of the gypsum board surface treating agent, which comprises the following steps:
weighing the components according to the formula of the gypsum board surface treating agent for later use;
uniformly mixing the silicon dioxide colloid, ethylene glycol, an organosilane coupling agent and a surfactant, and adjusting the pH value of the mixture to 9-10 to obtain a nano mixed solution;
and adding the filler into the nano mixed solution, stirring for 20-30 min under the condition of 800-1500 r/min, adding the leveling agent and the whitening agent, and stirring uniformly to obtain the nano composite material.
The gypsum board surface treating agent provided by the embodiment of the invention adopts the filler compounded by modified loess, epoxy resin, ethyl acrylate and glycerol according to a specific proportion, and is compounded with other components, so that the prepared surface treating agent is easy to push away and is coated on the surface of the gypsum board, the treatment efficiency is improved, pores and pores on the surface of the gypsum board can be well filled, the curing time is short, the surface of the gypsum board can be more flat and smooth after curing, the binding force with the gypsum board is strong, the gypsum board is not easy to fall off after long-term use, the continuous and beautiful decorative surface can be formed by the decorative beautification subsequently coated on the surface of the gypsum board, and the commercial value of the wall brick is improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The gypsum board surface treating agent provided by the embodiment of the invention adopts the filler compounded by modified loess, epoxy resin, ethyl acrylate and glycerol according to a specific proportion, and is compounded with other components, so that the prepared surface treating agent is easy to push away and is coated on the surface of the gypsum board, the hole repairing efficiency is high, the hole repairing effect is good, the binding force with the gypsum board is strong, the agent is not easy to fall off after long-term use, and the agent is beneficial to forming a continuous and beautiful decorative surface by subsequently coating decorative beautifiers on the surface of the gypsum board.
The embodiment of the invention provides a gypsum board surface treating agent which is prepared from a silicon dioxide colloid, ethylene glycol, an organosilane coupling agent, a surfactant, a filler, a leveling agent and a whitening agent in a mass ratio of 25-70: 0.1-1: 0.1-1.2: 0.1-1.5: 3-15: 0.5-2: 0.1-0.3.
Wherein, the filler is prepared by the following steps: mixing loess, montmorillonite and attapulgite according to a mass ratio of 10-12: 5:8 to obtain a loess mixture; slowly adding a mixed acid solution into the loess mixture while stirring, wherein the liquid-solid ratio of the loess mixture to the mixed acid solution is 1: 13-15, and obtaining acidified loess; roasting the acidified loess at the temperature of 550-600 ℃ for at least 30min, taking out and cooling, and grinding the acidified loess into particles with the particle size of 20-30 nm to obtain modified loess; the modified loess, the epoxy resin, the ethyl acrylate and the glycerol are mixed according to the mass ratio of 1-5: 30-45: 20-25: 6-18, and mixing uniformly to obtain the filler.
In the embodiment of the invention, the silica colloid is alkaline silica sol, and the particle size of silica particles in the silica colloid is 5-40 nm.
In the embodiment of the invention, the modified loess is obtained by modifying the loess by adopting the method, so that the modified loess has better thixotropy, stability and cohesiveness, and the modified loess, the epoxy resin, the ethyl acrylate and the glycerol in a specific proportion are compounded and used with other raw materials, so that the bonding force between the gypsum board surface treating agent and the gypsum board can be remarkably improved, and the modified loess is durable and does not fall off. In addition, a large number of tests show that the nanometer silicon dioxide particles can be quickly and well filled into pores and pores on the surface of the gypsum board, so that the uneven defect of the surface of the gypsum board is improved, the pore-filling effect of the treating agent can be further improved by the composite use of the silicon dioxide particles and the filler, a flat, smooth and fine coating layer can be formed on the surface of the gypsum board by the treating agent, and a continuous and beautiful decorative surface can be formed on the surface of the gypsum board by decorative matters such as resin patterns and the like. In addition, the filler is added into the treating agent system, so that the system has thixotropy, the treating agent can form a paste when the treating agent is not used, the treating agent is convenient to store and transport, and the treating agent can become a coating liquid with certain viscosity through stirring/shearing when the treating agent is used, so that the coating liquid is easy to push away and is coated on the surface of the gypsum board, and the surface treatment efficiency of the gypsum board is improved.
In the embodiment of the invention, the antifreezing property of the treating agent can be improved by adding the glycol, so that the treating agent can still be normally coated and used at a lower temperature, the use temperature range of the treating agent is expanded, and the treating agent can still be suitable for regions with lower temperature throughout the year.
In the embodiment of the present invention, the organosilane coupling agent may be any one of or any combination of methyltriethoxysilane, sodium methylsilicate, or methyltriacetoxysilane. In the embodiment of the present invention, the surfactant may be any one of or any combination of diethanolamine, polyoxyethylene ether, ethylene glycol butyl ether or isomeric tridecanol polyoxyethylene ether. A large number of experiments prove that the stability and the anti-fouling capability of the treating agent can be improved by adding a proper amount of organosilane coupling agent and surfactant into a gypsum board surface treating agent system.
In the embodiment of the invention, the leveling agent can be polyacrylic acid or carboxymethyl cellulose. By adding a proper amount of leveling agent into the system, the surface tension of the treating agent can be effectively reduced, the leveling property and uniformity of the treating agent are improved, the permeability of the treating agent can be improved, the possibility of generating spots and stains during brushing can be reduced, the coverage property is increased, a film is formed uniformly and naturally, and a smooth and fine coating surface can be formed on the surface of the gypsum board.
In embodiments of the invention, the whitening agent may be vinyltriethylsilane or titanium dioxide coated calcium carbonate. The color of the treating agent can be adjusted to be basically consistent with the natural color of the gypsum board by adding a proper amount of whitening agent. When the treating agent is coated on the surface of the gypsum board, natural effects of people can be visually generated, the natural color of the gypsum board is not influenced, and the problem that the surface of the traditional gypsum board is not flat can be well solved, thereby achieving two purposes.
In the embodiment of the invention, the modified loess, the epoxy resin, the ethyl acrylate and the glycerin are mixed according to the mass ratio of 1-5: 30-45: 20-25: 6~18 misce bene ", include specifically:
weighing the components according to the following formula for later use: 1-5 parts of modified loess, 30-45 parts of epoxy resin, 20-25 parts of ethyl acrylate and 6-18 parts of glycerol; and (3) putting the ethyl acrylate and the glycerol into a container, homogenizing and stirring for 5-10 min, adding the modified loess and the epoxy resin, and continuously stirring for 5-10 min to obtain the filler.
In a preferred embodiment of the present invention, the step of roasting the acidified loess at 550 to 600 ℃ for at least 30min, taking out and cooling the acidified loess, and then pulverizing the acidified loess into particles having a particle size of 20 to 30nm to obtain modified loess specifically includes: roasting the acidified loess at 550 deg.C for 30min, taking out, cooling, and pulverizing into particles with particle size of 20nm to obtain modified loess.
In a preferred embodiment of the present invention, the modified loess, the epoxy resin, the ethyl acrylate and the glycerin are mixed in a mass ratio of 3:40:25:10 in the filler.
In the embodiment of the invention, the mixed acid solution is a mixed solution of dilute sulfuric acid and dilute hydrochloric acid. Wherein, the dilute sulfuric acid refers to the aqueous solution of sulfuric acid with the solute mass fraction less than or equal to 70%. Dilute hydrochloric acid solution with mass fraction lower than 20%. When the diluted sulfuric acid and the diluted hydrochloric acid are used, the diluted sulfuric acid and the diluted hydrochloric acid can be mixed according to the volume ratio of 8-9: 1.
In a preferred embodiment of the invention, the mixing mass ratio of the silica colloid, the ethylene glycol, the organic silane coupling agent, the surfactant, the filler, the leveling agent and the whitening agent is 30-60: 0.1-0.5: 0.1-1: 0.5-1: 5-10: 0.5-1: 0.1-0.2. More preferably, the mixing mass ratio of the silica colloid, the ethylene glycol, the organosilane coupling agent, the surfactant, the filler, the leveling agent and the whitening agent is 45:0.5:0.1:0.1:0.5:8:1: 0.1.
The embodiment of the invention also provides a preparation method of the gypsum board surface treating agent, which comprises the following steps:
weighing the components according to the formula of the gypsum board surface treating agent for later use; uniformly mixing the silicon dioxide colloid, ethylene glycol, an organosilane coupling agent and a surfactant, and adjusting the pH value of the mixture to 9-10 to obtain a nano mixed solution; and adding the filler into the nano mixed solution, stirring for 20-30 min under the condition of 800-1500 r/min, adding the leveling agent and the whitening agent, and stirring uniformly to obtain the nano composite material.
Examples of certain embodiments of the invention are given below, which are not intended to limit the scope of the invention.
In addition, it should be noted that the numerical values given in the following examples are as precise as possible, but those skilled in the art will understand that each numerical value should be understood as a divisor rather than an absolutely exact numerical value due to measurement errors and experimental operational problems that cannot be avoided. For example, it is understood that the weight values of the components in the gypsum board surface treatment agent of each example may have an error of ± 2% or ± 1%, due to an error of a weighing instrument.
Example 1
The preparation method of the gypsum board surface treating agent of the embodiment is as follows:
weighing the components according to the following formula for later use (in parts by weight): 25 parts of silicon dioxide colloid (the particle size of silicon dioxide particles in the silicon dioxide colloid is 10nm), 0.1 part of ethylene glycol, 1.2 parts of organosilane coupling agent, 0.5 part of surfactant, 10 parts of filler, 0.5 part of flatting agent and 0.1 part of whitening agent; uniformly mixing the silicon dioxide colloid, ethylene glycol, an organosilane coupling agent and a surfactant, and adjusting the pH value of the mixture to 9 to obtain a nano mixed solution; and adding the filler into the nano mixed solution, stirring for 20min under the condition of 800r/min, adding the leveling agent and the whitening agent, and stirring uniformly to obtain the nano composite material.
Wherein, the filler is prepared by the following steps: mixing loess, montmorillonite and attapulgite according to a mass ratio of 10:5:8 to obtain a loess mixture; slowly adding a mixed acid solution of dilute sulfuric acid and dilute hydrochloric acid into the loess mixture while stirring, wherein the liquid-solid ratio of the loess mixture to the mixed acid solution is 1:15, and obtaining acidified loess; roasting the acidified loess at 550 deg.C for at least 30min, taking out, cooling, and pulverizing into particles with particle size of 20nm to obtain modified loess; and uniformly mixing the modified loess, the epoxy resin, the ethyl acrylate and the glycerol according to the mass ratio of 1:30:20:18 to obtain the filler.
Example 2
The preparation method of the gypsum board surface treating agent of the embodiment is as follows:
weighing the components according to the following formula for later use (in parts by weight): 70 parts of silicon dioxide colloid (the particle size of silicon dioxide particles in the silicon dioxide colloid is 5nm), 0.3 part of ethylene glycol, 1 part of organosilane coupling agent, 0.8 part of surfactant, 12 parts of filler, 0.7 part of flatting agent and 0.2 part of whitening agent; uniformly mixing the silicon dioxide colloid, ethylene glycol, an organosilane coupling agent and a surfactant, and adjusting the pH value of the mixture to 10 to obtain a nano mixed solution; and adding the filler into the nano mixed solution, stirring for 30min under the condition of 1500r/min, adding the leveling agent and the whitening agent, and stirring uniformly to obtain the nano composite material.
Wherein, the filler is prepared by the following steps: mixing loess, montmorillonite and attapulgite according to a mass ratio of 11:5:8 to obtain a loess mixture; slowly adding a mixed acid solution of dilute sulfuric acid and dilute hydrochloric acid into the loess mixture while stirring, wherein the liquid-solid ratio of the loess mixture to the mixed acid solution is 1:13, and obtaining acidified loess; roasting the acidified loess at 600 deg.C for at least 30min, taking out, cooling, and pulverizing into particles with particle size of 30nm to obtain modified loess; and uniformly mixing the modified loess, the epoxy resin, the ethyl acrylate and the glycerol according to the mass ratio of 2:35:25:15 to obtain the filler.
Example 3
The preparation method of the gypsum board surface treating agent of the embodiment is as follows:
weighing the components according to the following formula for later use (in parts by weight): 35 parts of silicon dioxide colloid (the particle size of silicon dioxide particles in the silicon dioxide colloid is 40nm), 0.5 part of ethylene glycol, 0.7 part of organosilane coupling agent, 1.2 parts of surfactant, 3 parts of filler, 2 parts of flatting agent and 0.15 part of whitening agent; uniformly mixing the silicon dioxide colloid, ethylene glycol, an organosilane coupling agent and a surfactant, and adjusting the pH value of the mixture to 10 to obtain a nano mixed solution; and adding the filler into the nano mixed solution, stirring for 25min under the condition of 1000r/min, adding the leveling agent and the whitening agent, and stirring uniformly to obtain the nano composite material.
Wherein, the filler is prepared by the following steps: mixing loess, montmorillonite and attapulgite according to a mass ratio of 11:5:8 to obtain a loess mixture; slowly adding a mixed acid solution of dilute sulfuric acid and dilute hydrochloric acid into the loess mixture while stirring, wherein the liquid-solid ratio of the loess mixture to the mixed acid solution is 1:14, and obtaining acidified loess; roasting the acidified loess at 600 deg.C for at least 30min, taking out, cooling, and pulverizing into particles with particle size of 25nm to obtain modified loess; and uniformly mixing the modified loess, the epoxy resin, the ethyl acrylate and the glycerol according to the mass ratio of 5:45:20:6 to obtain the filler.
Example 4
The preparation method of the gypsum board surface treating agent of the embodiment is as follows:
weighing the components according to the following formula for later use (in parts by weight): 50 parts of silicon dioxide colloid (the particle size of silicon dioxide particles in the silicon dioxide colloid is 25nm), 1 part of ethylene glycol, 0.3 part of organosilane coupling agent, 1.5 parts of surfactant, 9 parts of filler, 1 part of flatting agent and 0.12 part of whitening agent; uniformly mixing the silicon dioxide colloid, ethylene glycol, an organosilane coupling agent and a surfactant, and adjusting the pH value of the mixture to 9 to obtain a nano mixed solution; and adding the filler into the nano mixed solution, stirring for 20min at 900r/min, adding the leveling agent and the whitening agent, and stirring uniformly to obtain the nano composite material.
Wherein, the filler is prepared by the following steps: mixing loess, montmorillonite and attapulgite according to a mass ratio of 12:5:8 to obtain a loess mixture; slowly adding a mixed acid solution of dilute sulfuric acid and dilute hydrochloric acid into the loess mixture while stirring, wherein the liquid-solid ratio of the loess mixture to the mixed acid solution is 1:15, and obtaining acidified loess; roasting the acidified loess at 550 deg.C for at least 30min, taking out, cooling, and pulverizing into particles with particle size of 30nm to obtain modified loess; and uniformly mixing the modified loess, the epoxy resin, the ethyl acrylate and the glycerol according to the mass ratio of 5:35:20:12 to obtain the filler.
Example 5
The preparation method of the gypsum board surface treating agent of the embodiment is as follows:
weighing the components according to the following formula for later use (in parts by weight): 60 parts of silicon dioxide colloid (the particle size of silicon dioxide particles in the silicon dioxide colloid is 10nm), 0.8 part of ethylene glycol, 0.1 part of organosilane coupling agent, 0.1 part of surfactant, 5 parts of filler, 1 part of flatting agent and 0.1 part of whitening agent; uniformly mixing the silicon dioxide colloid, ethylene glycol, an organosilane coupling agent and a surfactant, and adjusting the pH value of the mixture to 9 to obtain a nano mixed solution; and adding the filler into the nano mixed solution, stirring for 30min at the speed of 800r/min, adding the leveling agent and the whitening agent, and stirring uniformly to obtain the nano composite material.
Wherein, the filler is prepared by the following steps: mixing loess, montmorillonite and attapulgite according to a mass ratio of 10:5:8 to obtain a loess mixture; slowly adding a mixed acid solution of dilute sulfuric acid and dilute hydrochloric acid into the loess mixture while stirring, wherein the liquid-solid ratio of the loess mixture to the mixed acid solution is 1:15, and obtaining acidified loess; roasting the acidified loess at 550 deg.C for at least 30min, taking out, cooling, and pulverizing into particles with particle size of 20nm to obtain modified loess; and uniformly mixing the modified loess, the epoxy resin, the ethyl acrylate and the glycerol according to the mass ratio of 5:35:20:10 to obtain the filler.
And (3) product performance testing: the following performance tests were performed on the gypsum board surface treating agents prepared in examples 1 to 5 and comparative example 1 (commercially available putty powder), and the test results are detailed in table 1 below. Wherein the adhesion (to gypsum board) is tested according to GB/T1720-1979; drying time (tack-free) was tested according to GB/T1728-1989; water resistance was tested according to GB/T1733-1993 (method A). Appearance of the coating film: and (3) coating the same amount of each test sample on the surface of the gypsum board with the same material and the same area, and observing the gypsum board in a bright place after a coating film is dried (completely dried), and recording the appearance condition of the surface of the gypsum board.
TABLE 1
As can be seen from table 1 above, compared with the putty powder provided in comparative example 1, the gypsum board surface treating agent provided in embodiments 1 to 5 of the present invention has significantly improved adhesion to gypsum boards, drying time, and water resistance, and the gypsum board surface treating agent provided in embodiments of the present invention has no foaming phenomenon at a film thickness of 500 μm, and can well fill pores and pores on the surface of a gypsum board when coated on the surface of the gypsum board, and form a smooth and fine coating layer.
In addition, a large number of experiments show that the component types and the use amounts of the components in the formula of the gypsum board surface treating agent can obviously influence the binding force of the gypsum board and the hole repairing effect and the application property of the gypsum board, and the components are specifically shown in comparative examples 2-7.
Comparative example 2
The raw materials and preparation process were the same as those in example 5, except that the same amount of silica colloid in the gypsum board surface treating agent was replaced with chromium trioxide polishing solution.
Comparative example 3
The raw materials and the preparation process were the same as those of example 5, except that the modified loess was used instead of the filler in the gypsum board surface-treating agent in an equivalent amount.
Comparative example 4
The raw materials and the preparation process were the same as those of example 5, except that the filler in the surface treatment agent for gypsum board was replaced with a filler obtained by mixing unmodified loess, epoxy resin, ethyl acrylate and glycerin in a mass ratio of 5:35:20:10 in equal amounts.
Comparative example 5
The raw materials and preparation process were the same as those of example 5, except that the amount of the filler used in the surface treatment agent for gypsum board was changed to 2 parts.
Comparative example 6
The raw materials and the preparation process were the same as those of example 5, except that the amount of the filler used in the surface treatment agent for gypsum board was changed to 16 parts.
Comparative example 7
The raw materials and the preparation process were the same as those of example 5, except that the amount of the filler used in the surface treatment agent for gypsum board was changed to 0 part.
The performance of the gypsum board surface treating agents prepared in the comparative examples 2 to 7 was tested by referring to the above product performance test method, and the test results are shown in Table 2 below.
TABLE 2
According to the above tables 1 and 2, as can be seen from the comparison results between the example 5 and the comparative example 2, the addition of the silica colloid in the system can improve the adhesion of the treating agent to the gypsum board and the hole-filling effect, and is beneficial to forming a smooth and fine coating film on the surface of the gypsum board. From the results of comparing comparative examples 3 to 4 with example 5, it can be seen that the coating film appearance of the gypsum board surface treating agent obtained in comparative example 3 in which the modified loess alone is used as the filler and comparative example 4 in which the mixture of unmodified loess with the epoxy resin, ethyl acrylate and glycerin is used is inferior to that of the gypsum board surface treating agent obtained in example 5 in which the mixture of modified loess with the epoxy resin, ethyl acrylate and glycerin is used as the filler. Therefore, the modified loess, epoxy resin, ethyl acrylate and glycerin mixture added into the system as a filler can obviously improve the adhesive force of the treating agent to the gypsum board and is beneficial to forming a smooth and exquisite coating film on the surface of the gypsum board. As is apparent from the results of comparing comparative examples 5 to 7 with example 5, the amount of the filler has a significant influence on the workability of the treating agent, and when the amount of the filler is too small, it is difficult to form a film on the surface of the gypsum board, and when the amount is too large, the viscosity of the treating agent becomes too high and significant caking is liable to occur at the time of coating, thereby affecting the normal use thereof, and therefore, the amount of the filler of the present invention is preferably 3 to 15 parts.
In addition, exemplarily, in practical application, the gypsum board surface treating agent provided by the embodiment of the invention is coated on the surface of the building material gypsum board, the coating film thickness is 250-500 micrometers, after the coating film is completely dried, a resin pattern is coated on the surface of the gypsum board, after the surface is cured, a continuous and beautiful decorative surface can be formed, and the resin pattern on the surface of the gypsum board can not crack, foam, fall off and the like in the using process.
To sum up, the gypsum board surface treating agent provided by the embodiment of the invention adopts the filler compounded by modified loess, epoxy resin, ethyl acrylate and glycerol according to a specific proportion, and is compounded with other components, so that the prepared surface treating agent is easy to push away and is coated on the surface of the gypsum board, the treatment efficiency is improved, air holes and pores on the surface of the gypsum board can be well filled, the curing time is short, the surface of the gypsum board can be smoother and smoother after curing, the binding force with the gypsum board is strong, the gypsum board is not easy to fall off after long-term use, and the gypsum board surface treating agent is beneficial to beautifying a continuous and beautiful decorative surface of a decorative object subsequently coated on the surface of the gypsum board, and the commercial value of wall bricks is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The gypsum board surface treating agent is characterized by comprising a silica colloid, ethylene glycol, an organic silane coupling agent, a surfactant, a filler, a leveling agent and a whitening agent according to a mass ratio of 25-70: 0.1-1: 0.1-1.2: 0.1-1.5: 3-15: 0.5-2: 0.1 to 0.3, mixing to obtain a mixture;
wherein, the filler is prepared by the following steps:
mixing loess, montmorillonite and attapulgite according to a mass ratio of 10-12: 5:8 to obtain a loess mixture;
slowly adding a mixed acid solution into the loess mixture while stirring, wherein the liquid-solid ratio of the loess mixture to the mixed acid solution is 1: 13-15, and obtaining acidified loess;
roasting the acidified loess at the temperature of 550-600 ℃ for at least 30min, taking out and cooling, and grinding the acidified loess into particles with the particle size of 20-30 nm to obtain modified loess;
the modified loess, the epoxy resin, the ethyl acrylate and the glycerol are mixed according to the mass ratio of 1-5: 30-45: 20-25: 6-18, and mixing uniformly to obtain the filler.
2. The gypsum board surface treatment of claim 1, wherein the silica colloid is an alkaline silica sol.
3. The gypsum board surface treatment agent according to claim 1, wherein the silica particles in the silica colloid have a particle size of 5 to 40 nm.
4. The gypsum board surface treatment agent according to claim 1, wherein the modified loess, the epoxy resin, the ethyl acrylate and the glycerin are mixed in a mass ratio of 1-5: 30-45: 20-25: 6-18, and specifically comprises the following steps:
weighing the components according to the following formula for later use: 1-5 parts of modified loess, 30-45 parts of epoxy resin, 20-25 parts of ethyl acrylate and 6-18 parts of glycerol;
and (3) putting the ethyl acrylate and the glycerol into a container, homogenizing and stirring for 5-10 min, adding the modified loess and the epoxy resin, and continuously stirring for 5-10 min to obtain the filler.
5. The gypsum board surface treatment agent according to claim 1, wherein the step of roasting the acidified loess at a temperature of 550 to 600 ℃ for at least 30min, taking out and cooling the acidified loess, and then pulverizing the acidified loess into particles having a particle size of 20 to 30nm to obtain modified loess comprises:
roasting the acidified loess at 550 deg.C for 30min, taking out, cooling, and pulverizing into particles with particle size of 20nm to obtain modified loess.
6. The gypsum board surface treatment agent according to claim 1, wherein the modified loess, the epoxy resin, the ethyl acrylate and the glycerin are mixed in a mass ratio of 3:40:25: 10.
7. The gypsum board surface treatment agent according to claim 1, wherein the mixed acid solution is a mixed solution of dilute sulfuric acid and dilute hydrochloric acid.
8. The gypsum board surface treating agent according to claim 1, wherein the mixing mass ratio of the silica colloid, the ethylene glycol, the organosilane coupling agent, the surfactant, the filler, the leveling agent and the whitening agent is 30-60: 0.1-0.5: 0.1-1: 0.5-1: 5-10: 0.5-1: 0.1-0.2.
9. The gypsum board surface treatment agent according to claim 8, wherein the mixing mass ratio of the silica colloid, ethylene glycol, organosilane coupling agent, surfactant, filler, leveling agent and whitening agent is 45:0.5:0.1:0.1:0.5:8:1: 0.1.
10. The method for producing the gypsum board surface treatment agent according to any one of claims 1 to 9, comprising the steps of:
weighing the components according to the formula of the gypsum board surface treating agent as defined in any one of claims 1 to 9 for later use;
uniformly mixing the silicon dioxide colloid, ethylene glycol, an organosilane coupling agent and a surfactant, and adjusting the pH value of the mixture to 9-10 to obtain a nano mixed solution;
and adding the filler into the nano mixed solution, stirring for 20-30 min under the condition of 800-1500 r/min, adding the leveling agent and the whitening agent, and stirring uniformly to obtain the nano composite material.
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