CN108084883B - Processing technology of granite-like water-based paint - Google Patents
Processing technology of granite-like water-based paint Download PDFInfo
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- CN108084883B CN108084883B CN201711381416.2A CN201711381416A CN108084883B CN 108084883 B CN108084883 B CN 108084883B CN 201711381416 A CN201711381416 A CN 201711381416A CN 108084883 B CN108084883 B CN 108084883B
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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
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses a processing technology of a granite-like water-based paint, and belongs to the technical field of building materials. The manufacturing process comprises the following steps: step one, preparing roll-coating type diatom ooze: A. pre-dispersing; B. stirring; C. thickening; step two, paint liquid preparation: sequentially adding deionized water, a defoaming agent, a film-forming assistant and cellulose into a high-speed dispersion machine for high-speed dispersion, and then sequentially adding heavy calcium carbonate and the roll-coating type diatom ooze obtained in the first step, stirring uniformly at a high speed; step three, manufacturing the pre-sol: sequentially adding deionized water and 5% solution of protective rubber powder into a high-speed dispersion machine; step four, preparing emulsion; and step five, adding the paint liquid, the pre-sol and the transparent emulsion into a reaction kettle in sequence according to a proportion, and uniformly stirring to obtain the granite-like water-based paint. According to the invention, the diatomite dry powder is combined with the synergistic effect of rutile type titanium dioxide, the pigment is firmly combined with micropores, and the problems of unstable color grains and unclear color grain boundary of the granite-like water-based coating are solved.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a processing technology of a granite-like water-based paint.
Background
Granite is a natural stone material widely used for outdoor decoration of buildings. However, granite is very expensive in manufacturing cost, has public danger when being used as a decorative surface on an outer wall of a building, and is not easy to be used for large-area or high-rise building outer wall veneering. Therefore, in order to achieve the luxurious appearance of granite in buildings, granite imitation materials are continuously coming out, the imitation process of granite is very complicated due to the multiple and different colors of granite, people need a material which is simple and convenient to manufacture to simplify the complexity of the imitation process, and under the background, granite-like coatings are produced. In China, the research of granite-like coatings began in the last 80 th century, and the granite-like coatings are mainly of oil-in-water type (O/W) and have the best storage stability and the widest application range, but the coatings contain a large amount of Volatile Organic Compounds (VOC), are harmful to the health of constructors and the surrounding environment and are not environment-friendly. Today, people have increasingly high requirements on their health and the surrounding living environment, and the "energy conservation" and "environmental protection" have become our national policies. Under the conditions, water-in-water (W/W) granite coatings (hereinafter referred to as water-based granite coatings) have become the hot point of research of various water-based coating manufacturers. The water-based granite coating is firstly researched by Americans, becomes a coating product capable of being applied to buildings only in the middle of the 90 s of the 20 th century, is a great breakthrough in the field of traditional architectural coatings, overcomes the defect that the O/W oil-in-water type granite coating in the middle of the 80 th century contains toxic and harmful substances such as volatile organic compounds, and is more energy-saving and environment-friendly. Is a new generation of green building coating. Has wide market prospect. In recent years, more manufacturers for domestic research on water-based granite coatings exist, but most of the water-based granite coatings on the market have uneven quality, some color grains are unstable and are easy to break; some color grains have unclear boundaries, but have the defects of short storage period, easy color bleeding, muddy water and the like, and the popularization and the use of the water-based granite coating are seriously influenced.
The diatomite is a natural siliceous porous nonmetallic mineral with a natural nano-microporous structure, large specific surface area, small bulk density and amorphous SiO2 as a main component, is widely applied to the fields of filtration of beer, beverages, drinking water, industrial grease and the like, sewage treatment, building materials, chemical industry, agriculture, rubber and plastic fillers, paper making fillers and the like, is an essential functional mineral material for many industries, has wide application prospect, and is added into the field of decoration, particularly paint, with the annual improvement of the consumption level of people, the concept of environmental protection decoration is well-focused, so that the technical personnel in recent years have the problem of cumin order to solve the problem.
China is a country with large reserves of diatomite and is second to the United states in the world. However, most of diatomite reserves in China are low-grade resources, and high-quality diatomite resources which can be directly applied are few. In the process of exploiting the first-grade diatomite resources, over 75 percent of low-grade diatomite resources are wasted, so that precious diatomite resources are seriously wasted, and the local environment is polluted. Comprehensive utilization and deep processing technology of low-grade diatomite ore is urgently needed by the development and utilization industry of diatomite at present and in the future. In the physical dressing of low-grade diatomite, scrubbing is an important link. The scrubbing function is mainly to enable the ore particles to be abraded and stripped, so that the purposes of cleaning, polishing and disintegrating are achieved.
The diatomite is generally formed by the deposition of remains of unicellular aquatic plant diatoms, the unique performance of the diatom lies in that the diatom can absorb free silicon in water to form bone skeletons, the diatom is deposited after the life of the diatom is finished, and a diatomite ore bed is formed under certain geological conditions.
Through retrieval, Chinese patent application, application number: 201210182067.2, publication date: 2016.1.20, discloses a water paint, which comprises the following components by weight: white cement 70-150; 5-15 parts of rutile type titanium dioxide; 30-70 parts of urushiol-based emulsifier; 70-110 parts of urushiol formaldehyde polycondensate emulsion. The raw lacquer is added into the water-based paint, so that the advantages of hardness, brightness, wear resistance, heat resistance and corrosion resistance of a film of the raw lacquer are fully exerted, the raw lacquer is emulsified by adding the urushiol-based emulsifier, the raw lacquer is guaranteed to have good compatibility, a compact and rigid interfacial film is favorably formed, the urushiol-based emulsifier can participate in a film forming reaction of the raw lacquer, the adverse effect of the traditional emulsifier on the performance of the coating is avoided, and the water-based paint has extremely high hardness. However, when the coating is applied to interior decoration, the adsorption capacity of the coating is poor after the coating is rolled and smoothed.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention provides a processing technology of a granite-like water-based paint, aiming at the problems of unstable color grains and unclear color grain boundaries of the granite-like water-based paint in the prior art.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a processing technology of granite-like water-based paint comprises the following manufacturing steps:
step one, preparing roll-coating type diatom ooze:
A. pre-dispersing: sequentially adding deionized water and cellulose, and dispersing at high speed in a high-speed dispersion machine;
B. stirring: adding rutile type titanium dioxide and diatomite dry powder and stirring at high speed; the diatomite dry powder is subjected to washing by diatomite ores and then settlement separation to obtain fine diatomite, and the fine diatomite is dried by a vacuum freeze-drying method to obtain the diatomite dry powder;
C. thickening: adding rubber powder when the temperature falls back, and stirring uniformly to obtain roll-coating diatom ooze;
step two, paint liquid preparation: sequentially adding deionized water, a defoaming agent, a film-forming assistant and cellulose into a high-speed dispersion machine for high-speed dispersion, and then sequentially adding heavy calcium carbonate and the roll-coating type diatom ooze obtained in the first step, stirring uniformly at a high speed;
step three, manufacturing the pre-sol: sequentially adding deionized water and 5% solution of protective rubber powder into a high-speed dispersion machine until the mixture is uniformly stirred;
step four, preparing the emulsion: deionized water, transparent emulsion, defoamer and film forming additive are added into a high-speed dispersion machine in sequence and stirred uniformly;
and step five, adding the paint liquid, the pre-sol and the emulsion into a reaction kettle in sequence according to a proportion, and uniformly stirring to obtain the granite-like water-based paint. In the process, the diatomite dry powder is combined with the synergistic effect of the rutile type titanium dioxide, the pigment is firmly combined with the micropores, the problems of unstable color grains and unclear color grain boundaries of the granite-like water-based coating are solved, and the technical effects of noise reduction, adsorption, air humidity adjustment and formaldehyde removal of the granite-like water-based coating are even improved.
The scheme is further improved, and when the step A in the step I is dispersed at a high speed, the temperature is not higher than 35 ℃; the rotating speed of the step B is not lower than 3200r/min until the powder is stirred uniformly; c, falling the temperature to 40 ℃; the proportion of the three in the fifth step is 4:4: 2.
The scheme is further improved, and the diatomite dry powder is prepared by the following steps:
(1) grading: conveying the diatomite ores in the diatomite raw ore bin to a grading sieve for grading by a belt conveyor;
(2) scrubbing: the diatomite ore with the magnetic ore removed is transferred to a scrubbing machine for scrubbing;
(3) screening: after being scrubbed, the materials are transferred to a rotary vibration sieve for screening;
(4) separation: settling in a settling tank to obtain concentrated diatomite slurry;
(5) paving a tray: spreading concentrated diatomite slurry in a material tray and then putting the material tray on a material rack;
(6) quick-freezing: pushing the material rack into a quick-freezing warehouse for quick freezing;
(7) freeze-drying: pushing the quick-frozen material into a vacuum freeze drying bin for quick freezing;
(8) crushing: and crushing the freeze-dried material to obtain the diatomite dry powder.
The scheme is further improved, and the following steps are also included between the steps (1) and (2):
selecting: the oversize material enters a manual selection belt, and impurities are manually selected;
crushing: crushing the selected raw ore;
magnetic separation: and (5) transferring the crushed materials and the undersize products obtained in the step one into a magnetic separator for magnetic separation.
The scheme is further improved, and the scrubbing machine in the step (2) is a three-groove scrubbing machine; the rotary vibration sieve in the step (3) is a double-layer rotary vibration sieve; in the step (4), the concentration of the concentrated diatomite slurry is 55 to 70 percent; the thickness of the middle paving plate in the step (5) is 4-5 cm; the quick freezing temperature in the step (6) is-38 to-42 ℃.
The scheme is further improved, the three-groove type scrubbing machine is respectively a pre-scrubbing groove → a fine scrubbing groove → a tail scrubbing groove in sequence, and the grooves are communicated with each other through a slurry pump and a pipeline.
The scheme is further improved, and the freeze-drying process of the vacuum freeze-drying bin in the step (7) is a stepped temperature rising type temperature curve.
The scheme is further improved, and the step heating temperature curve is as follows:
a. keeping the room temperature for 60-90 min, and vacuumizing to be within 100 Pa;
b. heating the plate to 40-45 ℃ and keeping the temperature for 70-90 min, and keeping the vacuum within 100 Pa;
c. heating the plate to 50-55 ℃, keeping the temperature for 120-150 min, and keeping the vacuum within 100 Pa;
d. heating the plate to 70-75 ℃, keeping the temperature for 80-100 min, and keeping the vacuum within 80 Pa;
e. heating the plate to 80-85 ℃, keeping the temperature for 30-50 min, and keeping the vacuum within 40 Pa;
f. and (3) cooling the plate temperature to 55 ℃, keeping the vacuum within 40Pa, keeping the plate temperature and the material temperature in two horizontal parallel lines for 30-40 min, and then breaking the vacuum and taking out the materials from the warehouse.
The proposal is further improved, and the temperature of a cold trap of the vacuum freeze drying bin is-38 to-42 ℃; and f, forcibly cooling by cooling water when the temperature of the plate is reduced.
The scheme is further improved, and a dispersing agent is added into the concentrated diatomite slurry in the step (7).
The proposal is further improved, the dispersant is polyurethane, and the dosage of the dispersant is 0.1 to 0.3 percent of the total weight of the diatomite concentrated slurry.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) according to the processing technology of the granite-like water-based paint, the diatomite dry powder is prepared by drying the cleaned diatomite through a vacuum freeze drying method, the uniformity and the specific surface area of micropores of the diatomite dry powder are greatly improved through observation of an electron microscope, and the rutile type titanium dioxide can permeate into the micropores under the action of high-speed stirring in combination with the synergistic effect of the rutile type titanium dioxide, so that the combination firmness of the rutile type titanium dioxide and the rutile type titanium dioxide is improved, the problems of unstable color grains and unclear color grain boundaries of the granite-like water-based paint are solved, and the technical effects of noise reduction, adsorption, air humidity adjustment and formaldehyde removal are improved; in addition, the diatomite with the porous structure is easy to crush after being freeze-dried, and can be crushed to the fineness required by the process according to the granularity requirement of other auxiliary materials;
(2) according to the processing technology of the granite-like water-based paint, the diatomite dry powder has the granularity requirement of 300-400 meshes, and when the diatomite dry powder is applied to building materials, the diatomite dry powder and other powder have a synergistic effect with the fineness of stone powder and rutile titanium dioxide, so that the aim of avoiding standing and precipitation is fulfilled;
(3) according to the processing technology of the granite-like water-based coating, the steps of the diatomite are progressively carried out according to grading → scrubbing → screening → separating → quick-freezing → freeze-drying, so that the purity and yield of the diatomite are improved, the production efficiency is improved, and the production cost is reduced;
(4) according to the processing technology of the granite-like water-based coating, the steps of diatomite ore selection → crushing → magnetic separation are adopted, so that impurities and ineffective components are removed in advance, and the increase of freeze-drying cost is avoided;
(5) according to the processing technology of the granite-like water-based coating, the characteristics of a freeze-drying technology are combined, a three-groove type scrubbing machine is selected, and the steps of pre-scrubbing → fine scrubbing → tail scrubbing are respectively carried out, so that the freeze-drying cost is reduced, and the finished product yield is improved; the concentrated diatomite slurry has the concentration of 55-70% and the thickness of a spreading plate of 4-5 cm, and is the preferable trial range for the inventor considering both the freeze-drying cost and the finished product yield; the quick-freezing temperature is-38 to-42 ℃, which is the best quick-freezing temperature range obtained by the inventor through test detection, is the temperature range of the maximum micro-ice crystal generation zone of the diatomite, and lays a foundation for the generation of uniform micropores;
(6) the processing technology of the granite-like water-based coating has the advantages that the step temperature rising type temperature curve is opposite to the common step temperature lowering type temperature curve, the step temperature rising type temperature curve is creative crystallization combining the characteristics of diatomite, and the generation of uniform micropores is guaranteed by combining quick-freezing temperature of minus 38-minus 42 ℃;
(7) according to the processing technology of the granite-like water-based coating, the step heating temperature curve is described in detail, the inventor further refines the step heating temperature curve by combining the thickness of the paving plate of 4-5 cm, the whole technology is guaranteed to be completed within 9 hours, and the production cost is further reduced;
(8) according to the processing technology of the granite-like water-based paint, the temperature of a cold trap is-38 to-42 ℃, and is consistent with the quick-freezing temperature, so that secondary sublimation of trapped water is avoided; the temperature is forcibly reduced by cooling water, so that the phenomenon that the generation of micropores is influenced because the heat of the plate at the final stage of sublimation exceeds the heat required by sublimation is avoided;
(9) according to the processing technology of the granite-like water-based coating, the dispersing agent is added into the concentrated diatomite slurry, so that the uniformity of micropore generation is further improved;
(10) according to the processing technology of the granite-like water-based paint, the dispersing agent is polyurethane, and polyurethane molecules can penetrate into micropores of the diatomite by combining the characteristics of the diatomite so as to improve the suspension effect.
Detailed Description
The present invention will be described in detail for further understanding of the present invention.
Example 1
The processing technology of the granite-like water-based paint comprises the following materials in parts by weight: 40 parts of deionized water, 40 parts of transparent emulsion, 40 parts of protective rubber powder 5% solution, 5 parts of heavy calcium carbonate, 6 parts of roll-coating type diatom ooze, 0.8 part of film-forming auxiliary agent, 0.8 part of cellulose, 0.2 part of defoaming agent and 0.05 part of wetting agent; the roll-coating diatom ooze comprises the following materials in parts by weight: 30 parts of deionized water, 20 parts of diatomite powder, 10 parts of rubber powder, 1 part of rutile type titanium dioxide and 1 part of cellulose.
Wherein, the preparation process of the diatomite is as follows: feeding diatomite ore in a diatomite raw ore bin into a belt conveyor through a feeding machine, transferring the diatomite ore to a classifying screen, feeding oversize materials into a hand-selecting belt, manually sorting out sundries such as branches, plastic broken films, iron wires, boulders and the like, feeding the diatomite ore into a crusher, feeding the crushed materials and undersize materials of the classifying screen into a magnetic separator through the belt conveyor, feeding the diatomite ore with magnetic materials into a buffer bin, feeding the diatomite ore into a metering belt conveyor through a quantitative feeding machine, feeding the diatomite ore into a four-groove scrubbing machine, adding water at a feeding port to adjust the concentration of the ore pulp to 35% -40%, adding NaOH into a first groove to enable the pH value to be 9-10, feeding the ore pulp after passing through the scrubbing machine into a diluting tank, and adding water to enable the ore pulp to be subjected to water supplementation so that the concentration of the ore pulp is adjusted to 35% -40%The concentration is 20% -25%, then the residue slurry is pumped to a double-layer rotary vibration sieve, the diameters of sieve pores are respectively 80 meshes and 200 meshes, in the sieving process, a proper amount of water is added to improve the sieving effect, the material larger than 80 meshes is coarse sand, the material smaller than 200 meshes flows to a buffer tank through a pipeline, the intermediate material of 200 meshes-80 meshes enters a two-tank scrubbing machine, the concentration is adjusted to 35% -40% by adding water, NaOH is added into the first tank of the two tanks to enable the pH value to be 9-10, the ore pulp passing through the scrubbing machine enters a single-layer rotary vibration sieve, the diameter of the sieve pores is 200 meshes, in the sieving process, a proper amount of water is added, the oversize material larger than 200 meshes is fine sand, the undersize material enters a buffer tank, a proper amount of dispersing agent is added into the buffer tank, the scrubbed and fully dispersed ore pulp of diatomite in the buffer tank is further subjected to sedimentation separation to obtain diatomite refined, the diatomite is dried and dried, Pulverizing to obtain diatomite powder. Through detection, the content of diatom in the raw diatomite ore is less than or equal to 80 percent, and the content of SiO is less than or equal to 80 percent2Content is less than or equal to 80 percent, Fe3O4The content is more than or equal to 3.04 percent, and the specific surface area of the raw ore is less than or equal to 19m2The content of diatom in the refined diatomite is more than or equal to 81 percent and SiO is obtained after the refined diatomite is cleaned, separated and dried by centrifugal sedimentation2Content is more than or equal to 81 percent, Fe3O4The content is less than or equal to 1.6 percent, the yield is more than or equal to 75 percent, and the specific surface area is more than or equal to 20m2/g。
The processing technology of the granite-like water-based paint of the embodiment comprises the following steps:
step one, preparing roll-coating type diatom ooze:
A. pre-dispersing: sequentially adding 30 parts of deionized water and 1 part of cellulose, dispersing for 5 minutes at a high speed in a high-speed dispersion machine, and cooling by circulating cooling water at the temperature of not higher than 35 ℃;
B. stirring: adding 1 part of rutile type titanium dioxide and 20 parts of diatomite powder, stirring at a high speed of not less than 3200r/min for 10 minutes until the powder is uniformly stirred, and stopping cooling water in the stirring process;
C. thickening: opening cooling water, adding 10 parts of rubber powder when the temperature of the paste falls back to 40 ℃, and stirring uniformly to prepare the roll-coating type diatom ooze, wherein the viscosity value is not lower than 120;
step two, paint liquid preparation: sequentially adding 10 parts of deionized water, 0.1 part of defoaming agent, 0.4 part of film-forming assistant and 0.8 part of cellulose into a high-speed dispersion machine for high-speed dispersion, and then sequentially adding 5 parts of heavy calcium carbonate and 6 parts of roll-coating type diatom ooze obtained in the first step, stirring at a high speed and stirring uniformly;
step three, manufacturing the pre-sol: sequentially adding 20 parts of deionized water and 30 parts of 5% protective rubber powder solution into a high-speed dispersion machine until the mixture is uniformly stirred;
step four, preparing the emulsion: sequentially adding 10 parts of deionized water, 40 parts of transparent emulsion, 0.1 part of defoaming agent and 0.4 part of film-forming auxiliary agent into a high-speed dispersion machine and stirring uniformly;
and step five, sequentially adding the paint liquid, the pre-sol and the emulsion into a reaction kettle according to the ratio of 4:4:2, and uniformly stirring to obtain the granite-like water-based paint. After sampling, the mark is sample one.
Example 2
The processing technology of the granite-like water-based paint comprises the following materials in parts by weight: 45 percent of deionized water, 45 percent of transparent emulsion, 45 percent of protective rubber powder solution, 6 percent of heavy calcium carbonate, 8 percent of roll-coating diatom ooze, 1.0 percent of film-forming auxiliary agent, 1.0 percent of cellulose and 0.1 percent of defoaming agent; the roll-coating diatom ooze comprises the following materials in parts by weight: deionized water 40, diatomite dry powder 30, rubber powder 20, rutile type titanium dioxide 2 and cellulose 2.
The processing technology of the granite-like water-based paint of the embodiment comprises the following steps:
step one, the manufacturing process of the diatomite dry powder is as follows:
(1) grading: the raw diatomite ore is transferred to a grading sieve for grading by a belt conveyor as in example 1;
(2) selecting: the oversize material enters a manual selection belt, and impurities are manually selected;
(3) crushing: crushing the selected raw ore;
(4) magnetic separation: transferring the crushed materials and the undersize materials obtained in the step one into a magnetic separator for magnetic separation
(5) Scrubbing: the diatomite ore without magnetic ore is transferred to a scrubbing machine for scrubbing, the scrubbing machine is a three-groove type scrubbing machine which is respectively a pre-scrubbing groove, a fine scrubbing groove and a tail scrubbing groove, wherein after water is added into the pre-scrubbing groove, the concentration of ore pulp is adjusted to be about 30%, the rotating speed of a stirring motor is 100 rpm, the pH value is adjusted to be 9, the three-groove type scrubbing machine rotates for about 10 minutes, the diatomite ore is mutually scrubbed to remove impurities such as sand, soil and the like by utilizing particles of the diatomite ore, the diatomite ore pulp is pumped to a double-layer rotary vibration sieve by a slag slurry pump, the diameters of sieve holes are respectively 80 meshes and 200 meshes, in the screening process, a proper amount of water is added to improve the screening effect, the material with the size larger than 80 meshes is treated as coarse sand, the material with the size smaller than 200 meshes flows to a buffer tank through a pipeline, the middle material with the sizes of 200 meshes to 80 meshes enters the fine scrubbing machine, the concentration is adjusted to be 50% by adding, rotating for about 20 minutes, then pumping the slurry to a tail washing tank by a slurry pump, adjusting the concentration of the slurry to about 40% by adding water, rotating the tail washing tank for about 5 minutes at the rotating speed of a stirring motor of 150 revolutions per minute;
(6) screening: after the tail washing tank is cleaned, the material is transferred to a single-layer rotary vibration sieve, the diameter of a sieve pore is 200 meshes, a proper amount of water is added in the sieving process, the oversize product larger than 200 meshes is fine sand, and the undersize product enters a buffer tank;
(7) separation: adding a proper amount of dispersing agent into a buffer tank, and further settling and separating the scrubbed and fully dispersed diatomite pulp in the buffer tank to obtain concentrated diatomite pulp, wherein the concentration of the concentrated diatomite pulp is 55-70%, and the concentration is 55% in the embodiment;
(8) paving a tray: spreading concentrated diatomite slurry in a material tray, and putting the material tray on a material rack, wherein the thickness of the material tray is 5 cm;
(9) quick-freezing: pushing the material rack into a quick-freezing warehouse for quick freezing, wherein the quick-freezing temperature is-42 ℃;
(10) freeze-drying: pushing the quick-frozen material into a vacuum freeze drying bin for quick freezing;
(11) crushing: and crushing the freeze-dried material to obtain the diatomite dry powder. Detection shows that the diatomite dry powder obtained after freeze-drying has diatom content not less than 86% and SiO content2Content is more than or equal to 86 percent, Fe3O4The content is less than or equal to 1.0 percent, the yield is more than or equal to 89 percent, and the specific surface area is more than or equal to 29m2(ii) in terms of/g. The uniformity and the specific surface area are greatly improved through the observation of an electron microscope, and the noise reduction, the adsorption and the air conditioning are further improvedGas humidity and the technical effect of removing formaldehyde.
Step two, preparing the roll-coating type diatom ooze:
A. pre-dispersing: sequentially adding 40 parts of deionized water and 2 parts of cellulose, dispersing for 5 minutes at a high speed in a high-speed dispersion machine, and cooling by circulating cooling water at the temperature of not higher than 35 ℃;
B. stirring: adding 2 parts of rutile titanium dioxide and 30 parts of the diatomite dry powder obtained in the first step, stirring at a high speed of not less than 3200r/min for 10 minutes until the powder is uniformly stirred, and stopping cooling water in the stirring process;
C. thickening: opening cooling water, adding 20 parts of rubber powder when the temperature of the paste falls back to 40 ℃, and stirring uniformly to prepare the roll-coating type diatom ooze, wherein the viscosity value is not lower than 120;
step three, paint liquid preparation: adding 15 parts of deionized water, 0.05 part of defoaming agent, 0.5 part of film-forming assistant and 1.0 part of cellulose into a high-speed dispersion machine in sequence, dispersing at high speed, adding 6 parts of heavy calcium carbonate and 8 parts of roll-coating type diatom ooze obtained in the second step in sequence, stirring at high speed and stirring uniformly;
step four, manufacturing the pre-sol: sequentially adding 20 parts of deionized water and 45 parts of 5% protective rubber powder solution into a high-speed dispersion machine until the mixture is uniformly stirred;
step five, preparing the emulsion: sequentially adding 10 parts of deionized water, 45 parts of transparent emulsion, 0.05 part of defoaming agent and 0.5 part of film-forming auxiliary agent into a high-speed dispersion machine and stirring uniformly;
and step six, adding the paint liquid, the pre-sol and the emulsion into a reaction kettle in sequence according to the ratio of 4:4:2, and uniformly stirring to obtain the granite-like water-based paint. And marking as sample two after sampling.
According to the processing technology of the granite-like water-based paint, the diatomite dry powder is combined with the synergistic effect of rutile type titanium dioxide, and the rutile type titanium dioxide can permeate into micropores of the diatomite dry powder under the action of high-speed stirring, so that the combination firmness of the diatomite dry powder and the rutile type titanium dioxide is improved, and the problems that the granite-like water-based paint is unstable in color grains, unclear in color grain boundaries and even easy to photolyze are solved.
Example 3
The processing technology of the granite-like water-based paint of the embodiment has the same basic steps as the embodiment 2, and is different and improved in that: the material comprises the following materials in parts by weight: 40 parts of deionized water, 40 parts of transparent emulsion, 40 parts of protective rubber powder 5% solution, 5 parts of heavy calcium carbonate, 7 parts of roll-coating type diatom ooze, 1.0 part of film-forming auxiliary agent, 1.0 part of cellulose and 0.2 part of defoaming agent; the roll-coating diatom ooze comprises the following materials in parts by weight: deionized water 35, diatomite dry powder 25, rubber powder 15, rutile type titanium dioxide 2 and cellulose 2.
The processing technology of the granite-like water-based paint of the embodiment comprises the following steps:
step one, the manufacturing process of the diatomite dry powder is as follows:
(1) grading: the raw diatomite ore is transferred to a grading sieve for grading by a belt conveyor as in example 1;
(2) selecting: the oversize material enters a manual selection belt, and impurities are manually selected;
(3) crushing: crushing the selected raw ore;
(4) magnetic separation: transferring the crushed materials and the undersize materials obtained in the step one into a magnetic separator for magnetic separation
(5) Scrubbing: the diatomite ore without magnetic ore is transferred to a scrubbing machine for scrubbing, the scrubbing machine is a three-groove type scrubbing machine which is respectively a pre-scrubbing groove, a fine scrubbing groove and a tail scrubbing groove, wherein after water is added into the pre-scrubbing groove, the concentration of ore pulp is adjusted to be about 30%, the rotating speed of a stirring motor is 100 rpm, the pH value is adjusted to be 9, the three-groove type scrubbing machine rotates for about 10 minutes, the diatomite ore is mutually scrubbed to remove impurities such as sand, soil and the like by utilizing particles of the diatomite ore, the diatomite ore pulp is pumped to a double-layer rotary vibration sieve by a slag slurry pump, the diameters of sieve holes are respectively 80 meshes and 200 meshes, in the screening process, a proper amount of water is added to improve the screening effect, the material with the size larger than 80 meshes is treated as coarse sand, the material with the size smaller than 200 meshes flows to a buffer tank through a pipeline, the middle material with the sizes of 200 meshes to 80 meshes enters the fine scrubbing machine, the concentration is adjusted to be 50% by adding, rotating for about 20 minutes, then pumping the slurry to a tail washing tank by a slurry pump, adjusting the concentration of the slurry to about 40% by adding water, rotating the tail washing tank for about 5 minutes at the rotating speed of a stirring motor of 150 revolutions per minute;
(6) screening: after the tail washing tank is cleaned, the material is transferred to a single-layer rotary vibration sieve, the diameter of a sieve pore is 200 meshes, a proper amount of water is added in the sieving process, the oversize product larger than 200 meshes is fine sand, and the undersize product enters a buffer tank;
(7) separation: the concentration of the concentrated diatomite slurry is 70 percent;
(8) paving a tray: the thickness of the spreading plate is 4 cm;
(9) quick-freezing: the quick-freezing temperature is-38 ℃;
(10) the freeze-drying process of the vacuum freeze-drying chamber in freeze-drying is a stepped temperature rise type temperature curve:
a. keeping the room temperature for 60min, and vacuumizing to be within 100 Pa;
b. heating the plate to 45 ℃ for 90min, and keeping the vacuum within 100 Pa;
c. heating the plate to 55 ℃ for 120min, and keeping the vacuum within 100 Pa;
d. heating the plate to 70 ℃ and keeping the temperature for 100min, and keeping the vacuum within 80 Pa;
e. heating the plate to 85 ℃ and keeping the temperature for 30min, and keeping the vacuum within 40 Pa;
f. and (3) reducing the temperature of the plate to 55 ℃, keeping the vacuum within 40Pa, keeping the temperature of the plate and the temperature of the material in two horizontal parallel lines for 40min, and then breaking the vacuum and taking out of the warehouse.
(11) Crushing: crushing the freeze-dried material to obtain diatomite dry powder, and detecting that the diatomite dry powder obtained after freeze-drying has the diatomite content of more than or equal to 86 percent and SiO2Content is more than or equal to 86 percent, Fe3O4The content is less than or equal to 1.0 percent, the yield is more than or equal to 89 percent, and the specific surface area is more than or equal to 33m2/g。
Step two, preparing the roll-coating type diatom ooze:
A. pre-dispersing: sequentially adding deionized water and cellulose, dispersing at high speed for 5 minutes in a high-speed dispersion machine, and cooling by circulating cooling water at a temperature not higher than 35 ℃;
B. stirring: adding rutile type titanium dioxide and diatomite dry powder, stirring at a high speed of not less than 3200r/min for 18 minutes until the powder is uniformly stirred, and stopping cooling water in the stirring process;
C. thickening: and (3) opening cooling water, adding the rubber powder when the makeup temperature falls back to 40 ℃, and uniformly stirring to prepare the granite-like water-based paint, wherein the viscosity value is not lower than 120.
Step three, paint liquid preparation: sequentially adding 10 parts of deionized water, 0.1 part of defoaming agent, 0.5 part of film-forming assistant and 1.0 part of cellulose into a high-speed dispersion machine for high-speed dispersion, and then sequentially adding 5 parts of heavy calcium carbonate and 7 parts of roll-coating type diatom ooze obtained in the second step, and stirring uniformly at a high speed;
step four, manufacturing the pre-sol: sequentially adding 20 parts of deionized water and 40 parts of 5% protective rubber powder solution into a high-speed dispersion machine until the mixture is uniformly stirred;
step five, preparing the emulsion: sequentially adding 10 parts of deionized water, 40 parts of transparent emulsion, 0.1 part of defoaming agent and 0.5 part of film-forming auxiliary agent into a high-speed dispersion machine and stirring uniformly;
and step six, adding the paint liquid, the emulsion liquid and the transparent emulsion into a reaction kettle in sequence according to the ratio of 4:4:2, and uniformly stirring to obtain the granite-like water-based coating. After sampling, the label is sample three.
Through detection, the granite-like water-based paint has a very strong noise reduction function after being applied to interior decoration, can effectively absorb high-frequency sound bands harmful to human bodies, and has a low-frequency noise attenuation function. The effect of the stone slab is equivalent to more than 3 times of that of cement mortar and stone slabs with the same thickness, and meanwhile, the sound time can be shortened by 80%, the harm of noise to human bodies is greatly reduced, and a quiet sleeping environment can be created. Because the thermal conductivity of the diatomite dry powder is very low, the diatomite dry powder is an ideal heat-insulating material, has very good heat-insulating performance, the heat-insulating effect is 8 times that of cement mortar with the same thickness, and the unique molecular sieve structure is strengthened, so that the diatomite dry powder can generate the waterfall effect after contacting with the moisture in the air, thereby continuously releasing negative oxygen ions beneficial to human bodies.
Example 4
The basic formula of the granite-like water-based coating of the embodiment is the same as that of the embodiment 3, and the basic steps are the same as that of the embodiment 3, wherein the granite-like water-based coating is different from and improved by the following steps:
the roll-coating diatom ooze in the embodiment comprises the following materials in parts by weight: 35 parts of deionized water, 25 parts of diatomite dry powder, 15 parts of rubber powder, 2 parts of rutile titanium dioxide and 1 part of cellulose; wherein, the preparation process of the diatomite dry powder is as follows:
(1) grading: the raw diatomite ore is transferred to a grading sieve for grading by a belt conveyor as in example 1;
(2) selecting: the oversize material enters a manual selection belt, and impurities are manually selected;
(3) crushing: crushing the selected raw ore;
(4) magnetic separation: transferring the crushed materials and the undersize materials obtained in the step one into a magnetic separator for magnetic separation
(5) Scrubbing: the diatomite ore without magnetic ore is transferred to a scrubbing machine for scrubbing, the scrubbing machine is a three-groove type scrubbing machine which is respectively a pre-scrubbing groove, a fine scrubbing groove and a tail scrubbing groove, wherein after water is added into the pre-scrubbing groove, the concentration of ore pulp is adjusted to be about 30%, the rotating speed of a stirring motor is 100 rpm, the pH value is adjusted to be 9, the three-groove type scrubbing machine rotates for about 10 minutes, the diatomite ore is mutually scrubbed to remove impurities such as sand, soil and the like by utilizing particles of the diatomite ore, the diatomite ore pulp is pumped to a double-layer rotary vibration sieve by a slag slurry pump, the diameters of sieve holes are respectively 80 meshes and 200 meshes, in the screening process, a proper amount of water is added to improve the screening effect, the material with the size larger than 80 meshes is treated as coarse sand, the material with the size smaller than 200 meshes flows to a buffer tank through a pipeline, the middle material with the sizes of 200 meshes to 80 meshes enters the fine scrubbing machine, the concentration is adjusted to be 50% by adding, rotating for about 20 minutes, then pumping the slurry to a tail washing tank by a slurry pump, adjusting the concentration of the slurry to about 40% by adding water, rotating the tail washing tank for about 5 minutes at the rotating speed of a stirring motor of 150 revolutions per minute;
(6) screening: after the tail washing tank is cleaned, the material is transferred to a single-layer rotary vibration sieve, the diameter of a sieve pore is 200 meshes, a proper amount of water is added in the sieving process, the oversize product larger than 200 meshes is fine sand, and the undersize product enters a buffer tank;
(7) separation: the concentration of the concentrated diatomite slurry is 68 percent;
(8) paving a tray: the thickness of the spreading plate is 4.5 cm;
(9) quick-freezing: the quick-freezing temperature is-38 ℃;
(10) the freeze-drying process of the medium vacuum freeze-drying bin is a stepped temperature rise type temperature curve:
a. keeping the room temperature for 60min, and vacuumizing to be within 100 Pa;
b. heating the plate to 45 ℃ for 90min, and keeping the vacuum within 100 Pa;
c. heating the plate to 55 ℃ for 120min, and keeping the vacuum within 100 Pa;
d. heating the plate to 70 ℃ and keeping the temperature for 100min, and keeping the vacuum within 80 Pa;
e. heating the plate to 85 ℃ and keeping the temperature for 30min, and keeping the vacuum within 40 Pa;
f. and (3) reducing the temperature of the plate to 55 ℃, keeping the vacuum within 40Pa, keeping the temperature of the plate and the temperature of the material in two horizontal parallel lines for 40min, and then breaking the vacuum and taking out of the warehouse.
Detection shows that the diatomite dry powder obtained after freeze-drying has diatom content not less than 86% and SiO content2Content is more than or equal to 86 percent, Fe3O4The content is less than or equal to 1.0 percent, the yield is more than or equal to 89 percent, and the specific surface area is more than or equal to 35m2/g。
The processing technology of the roll-coating diatom ooze comprises the following steps:
A. pre-dispersing: sequentially adding deionized water and cellulose, dispersing at high speed for 5 min in a high-speed dispersion machine, and cooling with circulating cooling water at a temperature not higher than 30 deg.C;
B. stirring: adding rutile type titanium dioxide and diatomite dry powder, stirring at a high speed of not less than 3000r/min for 18 minutes until the powder is uniformly stirred, and turning off cooling water in the stirring process;
C. thickening: and (3) opening cooling water, adding the rubber powder when the makeup temperature falls back to 40 ℃, and uniformly stirring to prepare the granite-like water-based paint, wherein the viscosity value is not lower than 120.
In the granite-like water-based paint of this example, the roll-coating type diatom ooze of this example was added and processed according to the procedure of example 3, and then a sample was taken.
Example 5
In the granite-like water-based paint of the embodiment, the raw diatomite ore is the same as that of the embodiment 2, and the basic steps for preparing the diatomite dry powder are the same as those of the embodiment 4, wherein the differences and improvements are as follows:
(7) separation: the concentration of the concentrated diatomite slurry is 60 percent;
(8) paving a tray: the thickness of the spreading plate is 4.5 cm;
(9) quick-freezing: the quick-freezing temperature is-40 ℃;
(10) the freeze-drying process of the vacuum freeze-drying chamber in freeze-drying is a stepped temperature rise type temperature curve:
a. keeping the room temperature for 90min, and vacuumizing to be within 100 Pa;
b. heating the plate to 40 ℃ and keeping the temperature for 70min, and keeping the vacuum within 100 Pa;
c. heating the plate to 50 ℃ for 150min, and keeping the vacuum within 100 Pa;
d. heating the plate to 75 ℃ for 80min, and keeping the vacuum within 80 Pa;
e. heating the plate to 80 ℃ and keeping the temperature for 50min, and keeping the vacuum within 40 Pa;
f. and forcibly cooling the plate temperature to 55 ℃ by cooling water, keeping the vacuum within 40Pa, keeping the plate temperature and the material temperature in two horizontal parallel lines for 30min, and then breaking the vacuum and taking out the plate from the warehouse.
(11) And crushing the freeze-dried material to obtain diatomite dry powder with the fineness of 300-400 meshes.
Detection shows that the specific surface area of the diatomite dry powder obtained after freeze-drying is more than or equal to 35m2/g。
The other steps of the preparation of the granite-like water-based paint of this example were the same as those of example 4, and five samples were taken.
Example 6
In the granite-like water-based paint of the embodiment, the raw diatomite ore is the same as that in the embodiment 1, and the basic steps for preparing the diatomite dry powder are the same as those in the embodiment 5, wherein the differences and the improvements are as follows: and (4) adding a dispersing agent into the concentrated diatomite slurry in the step (7), wherein the dispersing agent is polyurethane, the using amount of the polyurethane is 0.1-0.3% of the total weight of the concentrated diatomite slurry, and polyurethane molecules can penetrate into micropores of the diatomite by combining the characteristics of the diatomite so as to improve the suspension effect and avoid layering in the quick-freezing process.
The granite-like water-based paint of this example was processed in the same manner as in example 4, and six samples were taken.
Example 7
The granite-like aqueous coatings prepared in examples 1, 2, 3, 4, 5 and 6, listed in columns one to six respectively, were rolled onto a ceramic plate to the same thickness, after which the doors of the climatic chamber were opened, a formaldehyde-releasing density plate was placed in advance, and an initial formaldehyde concentration of 1.84mg/m after equilibration had been determined3Then, putting a ceramic plate coated with granite-like water-based paint in, closing the cabin door, statically waiting for 48 hours or even 96 hours, and seeing how the formaldehyde concentration in the ceramic plate changes:
as is apparent from the above comparison table, when the diatomite dry powder of the second to sixth samples prepared by the freeze-drying process is applied to the granite-like water-based paint, the formaldehyde removal rate is significantly improved compared with the first sample, and the problem of the degree of removal saturation (formaldehyde residue is increased after 96 hours) is significant compared with the first sample, and the adsorption saturation of the second to sixth samples is not generated within at least 96 hours.
Claims (5)
1. A processing technology of granite-like water-based paint is characterized by comprising the following manufacturing steps:
step one, preparing roll-coating type diatom ooze:
A. pre-dispersing: sequentially adding deionized water and cellulose, and dispersing at high speed in a high-speed dispersion machine;
B. stirring: adding rutile type titanium dioxide and diatomite dry powder and stirring at high speed; the diatomite dry powder is subjected to washing by diatomite ores and then settlement separation to obtain fine diatomite, and the fine diatomite is dried by a vacuum freeze-drying method to obtain the diatomite dry powder;
C. thickening: adding rubber powder when the temperature falls back, and stirring uniformly to obtain roll-coating diatom ooze;
step two, paint liquid preparation: sequentially adding deionized water, a defoaming agent, a film-forming assistant and cellulose into a high-speed dispersion machine for high-speed dispersion, and then sequentially adding heavy calcium carbonate and the roll-coating type diatom ooze obtained in the first step, stirring uniformly at a high speed;
step three, manufacturing the pre-sol: sequentially adding deionized water and 5% solution of protective rubber powder into a high-speed dispersion machine until the mixture is uniformly stirred;
step four, preparing the emulsion: deionized water, transparent emulsion, defoamer and film forming additive are added into a high-speed dispersion machine in sequence and stirred uniformly;
step five, adding the paint liquid, the pre-sol and the emulsion into a reaction kettle in sequence according to a proportion, and uniformly stirring to obtain the granite-like water-based paint;
when the step A in the first step is dispersed at a high speed, the temperature is not higher than 35 ℃; the rotating speed of the step B is not lower than 3200r/min until the powder is stirred uniformly; c, falling the temperature to 40 ℃; the proportion of the three in the step five is 4:4: 2;
the kieselguhr dry powder is prepared by the following steps:
(1) grading: conveying the diatomite ores in the diatomite raw ore bin to a grading sieve for grading by a belt conveyor;
(2) scrubbing: the diatomite ore with the magnetic ore removed is transferred to a scrubbing machine for scrubbing;
(3) screening: after being scrubbed, the materials are transferred to a rotary vibration sieve for screening;
(4) separation: settling in a settling tank to obtain concentrated diatomite slurry; the concentration of the concentrated diatomite slurry is 55 to 70 percent;
(5) paving a tray: spreading concentrated diatomite slurry in a material tray and then putting the material tray on a material rack; the thickness of the paving plate is 4-5 cm;
(6) quick-freezing: pushing the material rack into a quick-freezing warehouse for quick freezing; the quick-freezing temperature is-38 to-42 ℃;
(7) freeze-drying: pushing the quick-frozen material into a vacuum freeze drying bin for drying; the freeze-drying process of the vacuum freeze-drying bin is a stepped temperature rise type temperature curve; the step heating temperature curve is as follows:
a. keeping the room temperature for 90min, and vacuumizing to be within 100 Pa;
b. heating the plate to 40 ℃ and keeping the temperature for 70min, and keeping the vacuum within 100 Pa;
c. heating the plate to 50 ℃ for 150min, and keeping the vacuum within 100 Pa;
d. heating the plate to 75 ℃ for 80min, and keeping the vacuum within 80 Pa;
e. heating the plate to 80 ℃ and keeping the temperature for 50min, and keeping the vacuum within 40 Pa;
f. forcibly cooling the plate temperature to 55 ℃ by cooling water, keeping the vacuum within 40Pa, keeping the plate temperature and the material temperature in two horizontal parallel lines for 30min, and then breaking the vacuum and taking out the plate;
(8) crushing: crushing the freeze-dried material to obtain diatomite dry powder with the fineness of 300-400 meshes and the specific surface area of more than or equal to 35m2/g。
2. The processing technology of the granite-like water-based paint of claim 1, characterized in that: the method also comprises the following steps between the steps (1) and (2):
selecting: the oversize material enters a manual selection belt, and impurities are manually selected;
crushing: crushing the selected raw ore;
magnetic separation: and (5) transferring the crushed materials and the undersize products obtained in the step one into a magnetic separator for magnetic separation.
3. The processing technology of the granite-like water-based paint of claim 2, characterized in that: the scrubbing machine in the step (2) is a three-groove type scrubbing machine; and (4) the rotary vibration sieve in the step (3) is a double-layer rotary vibration sieve.
4. The processing technology of the granite-like water-based paint of claim 3, characterized in that: the three-groove type scrubbing machine is respectively a pre-scrubbing groove → a fine scrubbing groove → a tail scrubbing groove in sequence, and all the grooves are communicated with each other through a slurry pump and a pipeline.
5. The processing technology of the granite-like water-based paint of claim 4, characterized in that: the cold trap temperature of the vacuum freeze drying bin is-38 to-42 ℃.
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| CN101497444B (en) * | 2009-03-04 | 2012-07-18 | 中国科学院广州能源研究所 | Method for preparing nano polyporous material with large specific surface area by vacuum freeze-drying process |
| CN102744145A (en) * | 2012-06-18 | 2012-10-24 | 中国矿业大学(北京) | Scrubbing process for diatomaceous earth ores |
| CN105038456A (en) * | 2015-07-29 | 2015-11-11 | 福建欧品建筑材料科技有限公司 | Imitative amphibole granite colorful coating and preparation method thereof |
| CN106278031A (en) * | 2016-08-11 | 2017-01-04 | 北京南极海新材料股份有限公司 | A kind of roll-on-type diatom ooze environment protection interior wall powder body material and preparation method thereof |
| CN107446449A (en) * | 2017-07-27 | 2017-12-08 | 芜湖市三山龙城新材料有限公司 | Colorful imitation marble paint and preparation method thereof |
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