CN112125627A - Seal cutting gypsum and preparation method thereof - Google Patents
Seal cutting gypsum and preparation method thereof Download PDFInfo
- Publication number
- CN112125627A CN112125627A CN202010976055.1A CN202010976055A CN112125627A CN 112125627 A CN112125627 A CN 112125627A CN 202010976055 A CN202010976055 A CN 202010976055A CN 112125627 A CN112125627 A CN 112125627A
- Authority
- CN
- China
- Prior art keywords
- gypsum
- seal cutting
- powder
- seal
- stirring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- C04B28/14—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 calcium sulfate cements
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1066—Oxides, Hydroxides
-
- 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
-
- 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
- C04B2111/00956—Uses not provided for elsewhere in C04B2111/00 for making sculptures or artistic casts
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention relates to the technical field of seal cutting products, in particular to seal cutting gypsum and a preparation method thereof, wherein the seal cutting gypsum comprises the following raw materials in parts by weight: 45-55 parts of gypsum powder, 4-6 parts of defoaming agent, 4-8 parts of sol powder and 15-25 parts of water. The seal cutting gypsum of the invention has moderate hardness, is suitable for young students or seal cutting beginners, can be used for seal cutting thick and thin pen drawing lines easily, is not easy to be damaged by a seal cutting knife because of excessive hardness and improper force, wherein the gypsum powder is adopted, slightly expands during solidification and hardening, does not generate gaps, has smooth and fine surface, improves the cohesiveness of the gypsum powder under the action of sol powder and water, improves the cohesive strength of gypsum products, can inhibit and eliminate air bubbles in a system by combining with a defoaming agent, avoids the seal cutting effect influenced by the cavity phenomenon of a gypsum processing line, and enables the prepared seal cutting gypsum to seal cut thick and thin pen drawing lines.
Description
Technical Field
The invention relates to the technical field of seal cutting products, in particular to seal cutting gypsum and a preparation method thereof.
Background
The seal cutting art is an art of making a seal by combining calligraphy and engraving, and is a special art form of Chinese characters. At present, in the student learning stage, many schools develop the study of Chinese traditional culture to inherit the traditional culture and develop the out-of-class practical ability of students, so that the students develop in many aspects.
The traditional seal cutting art adopts jade (such as Qingtian stone) or wood materials for seal cutting, but the jade materials have higher hardness, and the seal cutting on the surface of the jade needs larger strength, so that students in primary school or middle school are easy to be injured by seal cutting knives with improper force during seal cutting, and have certain danger; wood materials have lower hardness than jade materials, but are still easily damaged by seal cutting knife due to improper force for young students.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the seal cutting gypsum which is moderate in hardness, smaller in hardness than jade materials and wood materials, suitable for small-age students or seal cutting beginners, easy to seal cut thick and thin lines and not prone to being damaged by a seal cutting knife due to improper force exertion caused by too large hardness.
The invention aims to provide a preparation method of seal cutting gypsum, which is simple to operate and easy to control, so that the prepared seal cutting gypsum has certain hardness, is easy to seal cut and is suitable for large-scale production.
The purpose of the invention is realized by the following technical scheme: the seal cutting gypsum comprises the following raw materials in parts by weight:
the seal cutting gypsum prepared by the raw materials has moderate hardness, is suitable for young students or seal cutting beginners, can be used for seal cutting thick and thin lines easily, and is not easy to be damaged by a seal cutting knife due to improper force caused by excessive hardness.
The gypsum powder has low density and strength, so that the hardness of the prepared gypsum product is lower than that of jade materials, and a member with a smooth and fine surface is formed when the gypsum is hardened. Through research, lime or cement is adopted to prepare the seal-cut product, and the phenomena of shrinkage, cracks and the like are easy to occur during solidification and hardening; when the seal cutting gypsum powder is used for preparing the seal cutting product, the seal cutting gypsum powder slightly expands during solidification and hardening without generating gaps, and the prepared seal cutting gypsum has stable structure.
The defoaming agent can inhibit and eliminate bubbles in the system, and avoid the existence of bubbles in the system to cause the surface or the inside of the seal cutting gypsum to have a cavity phenomenon, thereby influencing the strength of the seal cutting gypsum and being easy to loosen on the one hand, and on the other hand, the cavity generated by the bubbles influences the seal cutting effect of pictures and texts to cause irregular lines and depth of the pictures and texts.
The sol powder is added into water to form sol glue with certain viscosity, so that the gypsum powder with low density and easy looseness can be bonded, the internal bonding strength of a gypsum product is improved, a whole block or a part of gypsum is not easy to be cut and adjusted in seal cutting, and thick and thin pen drawing lines can be cut in seal cutting.
Preferably, the mesh number of the gypsum powder is 140-180 meshes; by controlling the mesh number of the gypsum powder, the seal cutting gypsum can be uniformly dispersed in a mixed system of sol powder and water, and is stably bonded, so that the prepared seal cutting gypsum has certain strength and smooth and fine surface; if the mesh number of the gypsum powder is too small, the gypsum powder is easy to agglomerate in a glue dissolving system and is dispersed unevenly, so that the strength of the prepared seal cutting gypsum is uneven; if the mesh number of the gypsum powder is too large, the prepared seal cutting gypsum is easy to be cut off by the gypsum powder with large mesh number during seal cutting, so that the strokes and lines of the seal cutting are not clear, and the image-text precision is lower.
Preferably, the defoaming agent is at least one of ByK-017, ByK-044 and ByK-019.
The defoaming agent can inhibit the generation of bubbles in the system, eliminate the generated bubbles and avoid the phenomenon that the surface or the interior of the seal cutting gypsum has cavities due to the existence of the bubbles in the system; the adopted Pico defoaming agent BYK-017 and the Pico defoaming agent BYK-044 have excellent defoaming performance on a system containing an inorganic phase, and the defoaming performance of an aqueous system can be improved by combining the Pico defoaming agent BYK-019. More preferably, the defoaming agent is a mixture consisting of BYK-017, BYK-044 and BYK-019 in a weight ratio of 3-4:2-2.5: 1.
Preferably, the sol is 007 type building instant glue powder.
The adopted building instant adhesive powder is powdery particles consisting of various inorganic substances, and has the characteristics of compression resistance, wear resistance, high hardness, no seam, no heat absorption, ultraviolet resistance, permeability resistance, cracking resistance, hollowing resistance, fire resistance, no heat conduction, water resistance and the like. More preferably, the 007 type building instant rubber powder can be selected from the building instant rubber powder of Yunnan Jiyi Jia building materials Co, Ltd, the building instant rubber powder of Jiangxi Jinmen science and technology Co, Ltd or the building instant rubber powder of Luoyang brother rubber industry Material Co.
Preferably, the seal cutting gypsum also comprises 5-10 parts of inorganic filler, wherein each part of inorganic filler comprises silicon carbide, calcium carbonate and silicon micropowder, and the mixing weight ratio of the silicon carbide, the calcium carbonate and the silicon micropowder is 1:0.8-1.5: 3-4.
After the gypsum powder as the main material is mixed with water and hardened and formed, the interior of the gypsum product has a large number of pores, and the porosity can reach 50-60%, so that the hardened gypsum has low density and low strength, therefore, the invention introduces the inorganic filler with high strength and improves the strength of the hardened gypsum product. The inorganic filler is conventionally applied to high polymers such as plastics and the like to play a role in reinforcement, and even the compatibility of the filler in the high polymers is improved by adopting modification treatment, so that the strength of the high polymers is improved; however, it is not easy to think of the art that gypsum with large porosity is filled and reinforced by using filler.
The silicon carbide adopted by the invention has high strength, and can improve the strength of gypsum; the calcium carbonate for wiping can reduce the cost of gypsum and improve the dispersibility; the adopted silica micropowder can improve the cohesive viscosity of the gypsum and reduce the cost; and the strength of the seal cutting gypsum can be effectively improved by mixing and compounding the inorganic filler with the weight ratio of 1:0.8-1.5: 3-4.
Preferably, the seal-cutting gypsum also comprises 5-10 parts of inorganic filler, the inorganic filler is a composite filler microsphere subjected to coating modification treatment, and the coating modification treatment comprises the following steps:
s1: adding silicon dioxide and a dispersing agent into deionized water, and mixing and dispersing to prepare a bulk material;
s2: uniformly mixing silicon carbide, calcium carbonate and silicon micropowder to prepare mixed powder; then adding the mixed powder into deionized water, adding a coupling agent, mixing and dispersing, heating and stirring to prepare a precursor;
s3: and (4) adding the precursor prepared in the step S2 into the dispersing material prepared in the step S1, uniformly mixing, carrying out heat preservation treatment, cooling to normal temperature, and drying to obtain the composite filler microsphere.
Preferably, in the step S1, the mixing weight ratio of the silicon dioxide, the dispersant and the deionized water is 3-5:1: 15; the particle size of the silicon dioxide is 50-200 nm; by controlling the mixing ratio of the materials and the particle size of the silicon dioxide, the silicon dioxide can be uniformly dispersed, does not delaminate and agglomerate, and the prepared dispersed material is uniform and stable.
Preferably, in the step S2, the mixing weight ratio of the silicon carbide, the calcium carbonate and the silicon micropowder is 1:0.8-1.5: 3-4; the mixing weight ratio of the mixed powder, the coupling agent and the deionized water is 1: 0.3-0.8: 10-12. By controlling the mixing proportion of the silicon carbide, the calcium carbonate and the silicon micropowder, the mixed powder is uniformly dispersed under the action of the coupling agent, the inorganic phase binding force on the surface of the powder is improved, the three powder materials are stably combined, and further, when the subsequent coating is carried out by adopting silicon dioxide, the three powder materials can be simultaneously coated into a nuclear layer as much as possible, so that the reinforcing effect on gypsum is improved; the coated and modified composite filler microspheres may include coated microspheres coated with three kinds of powder as a core layer, coated microspheres coated with silicon carbide and calcium carbonate as core layers, coated microspheres coated with silicon carbide and silica powder as core layers, coated microspheres coated with calcium carbonate and silica powder as core layers, coated microspheres coated with silicon carbide as core layers, coated microspheres coated with calcium carbonate as core layers, and coated microspheres coated with silica powder as core layers; the applicant finds that the three fillers are simultaneously modified and then simultaneously coated, and compared with the two situations that the fillers are respectively modified and then coated or the fillers are respectively modified and then respectively coated, the treatment means of simultaneous modification and coating can more remarkably improve the strength of the seal cutting gypsum, reduce the water absorption of the seal cutting gypsum and ensure that the gypsum is not easy to absorb water and has soft collapse and the like.
Preferably, in the step S2, the temperature raising and stirring is carried out at 85-95 ℃ and the stirring speed is 400-800rpm for 30-35 min.
By controlling the temperature rise and the stirring speed, the coupling modification of the surface of the inorganic filler can be improved, the hydrophilic and inorganic phases of the surface of the filler are improved, the combination and cohesion of the mixed powder are further improved, and the follow-up silica shell layer is coated with three fillers as much as possible.
Preferably, in the step S3, the mixing weight ratio of the precursor to the dispersing material is 2-4: 7; the temperature of the heat preservation treatment is 95-100 ℃, and the heat preservation time is 2-4 h.
By controlling the mixing ratio of the precursor and the dispersing material and the temperature and time of heat preservation treatment, the dispersing material can coat the precursor to form a coating microsphere structure of a mixed filler nuclear layer-silicon dioxide shell layer; the reinforcing effect and the water absorption resistance of the gypsum are improved, so that the prepared gypsum has stable performance and is not easy to collapse or loosen.
According to the invention, the inorganic filler is modified by coating microspheres, so that the inorganic filler forms a coated core-shell structure, a good bonding interface is formed between the inorganic filler and the gypsum powder, the dispersibility in a gypsum system is improved, and the strength increasing effect of the inorganic filler on gypsum products is further improved.
Wherein, step S1 is to disperse silicon dioxide evenly in water by using a dispersant to form a dispersing material of a shell layer; and step S2, the inorganic filler is modified by the coupling agent, the blending property of the silicon carbide, the calcium carbonate and the silicon micropowder is improved, and the binding property of the silicon carbide, the calcium carbonate and the silicon micropowder in the dispersion material is improved, so that the inorganic filler is added into the dispersion material in the step S3, the mixed powder can be coated by the silica shell, a core layer-silica shell coating microsphere structure of the mixed powder is formed, and the strength of the seal-cutting gypsum is improved.
The other purpose of the invention is realized by the following technical scheme: the preparation method of the seal cutting gypsum comprises the following steps:
step A: adding the raw materials except the gypsum powder into water according to the parts by weight, uniformly dispersing, then adding the gypsum powder while stirring, and uniformly stirring to obtain gypsum slurry;
and B: and D, pouring the gypsum slurry prepared in the step A into a mould, standing until the gypsum is solidified, demoulding to obtain a gypsum semi-finished product, and drying and forming to obtain the seal-cut gypsum.
Preferably, in the step A, the stirring speed of adding the gypsum powder while stirring is 200-500rpm, and after the gypsum powder is added, the stirring is continued for 15-25min under the condition of the speed of 200-500 rpm.
Preferably, in the step B, the drying and forming is to naturally air-dry the gypsum semi-finished product for 6 to 10 days, or dry the gypsum semi-finished product in an oven at the temperature of between 28 and 38 ℃ for 2 to 5 days until the water content is less than 0.6 percent.
The preparation method of the seal cutting gypsum is simple to operate and easy to control, the raw materials except the gypsum powder are added into water for dispersing to form a uniformly dispersed and stable sol water system, then the gypsum powder is added while stirring, the dispersion uniformity of the gypsum powder in the sol water system is improved, the stirring speed is controlled, the gypsum powder is slowly added and slowly stirred, the generation of bubbles in the feeding and stirring processes can be reduced, the bubbles in the system are driven out in a slow stirring mode, and the phenomena that the seal cutting gypsum has cavities and the like are reduced. The system added with the gypsum powder can be solidified and preliminarily formed through standing and volatilization of moisture, and can be demoulded after solidification and forming for subsequent drying, and the drying after demould can accelerate the volatilization of the moisture and reduce the blocking influence of a mould on the volatilization of the moisture; the natural drying mode or the oven heat drying mode can be adopted, and the seal cutting gypsum is dried until the water content is less than 0.6 percent, so that the seal cutting gypsum has stable strength and is not easy to collapse or loosen due to the existence of water.
The invention has the beneficial effects that: the seal cutting gypsum provided by the invention is moderate in hardness, is suitable for small-age students or seal cutting beginners, can be used for seal cutting thick, thin and shallow pen drawing lines easily, and is not easy to be damaged by a seal cutting knife due to improper force exertion caused by excessive hardness. When the seal cutting gypsum is used for preparing the seal cutting product, the gypsum powder slightly expands during solidification and hardening without gaps, the surface is smooth and fine, the cohesiveness of the gypsum powder is improved under the action of sol powder and water, the internal bonding strength of the gypsum product is improved, bubbles in a system can be inhibited and eliminated by combining a defoaming agent, the seal cutting effect is prevented from being influenced by the gypsum processing line cavity phenomenon, and the prepared seal cutting gypsum can be used for seal cutting thick and thin pen drawing lines.
The preparation method of the seal cutting gypsum is simple to operate and easy to control, can uniformly disperse materials to form a stable gypsum system, and after solidification, primary forming, demolding and drying, the prepared seal cutting gypsum has stable strength and is not easy to soften or collapse or loosen due to the existence of moisture, so that the seal cutting gypsum can be used for large-scale production.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
Example 1
The seal cutting gypsum comprises the following raw materials in parts by weight:
the mesh number of the gypsum powder is 140 meshes; the antifoaming agent is a Pico antifoaming agent BYK-044.
The sol is 007 type building instant rubber powder selected from 007 type building instant rubber powder of Jiangxi Jinmen science and technology Limited.
The preparation method of the seal cutting gypsum comprises the following steps:
step A: adding the raw materials except the gypsum powder into water according to the parts by weight, uniformly dispersing, then adding the gypsum powder while stirring, and uniformly stirring to obtain gypsum slurry;
and B: and D, pouring the gypsum slurry prepared in the step A into a mould, standing until the gypsum is solidified, demoulding to obtain a gypsum semi-finished product, and drying and forming to obtain the seal-cut gypsum.
In the step A, the stirring speed of adding the gypsum powder while stirring is 200rpm, and after the gypsum powder is added, the stirring is continued for 25min under the condition of the rotation speed of 200 rpm.
And in the step B, drying and forming, namely naturally airing the gypsum semi-finished product for 6 days, or drying the gypsum semi-finished product in an oven at the temperature of 28 ℃ for 5 days until the water content is less than 0.6%.
Example 2
The seal cutting gypsum comprises the following raw materials in parts by weight:
the mesh number of the gypsum powder is 160 meshes; the antifoaming agent is Pico antifoaming agent BYK-017.
The sol is 007 type building instant glue powder, and is selected from 007 type building instant glue powder of Yunnan Jiyi Jia building materials Co.
The preparation method of the seal cutting gypsum comprises the following steps:
step A: adding the raw materials except the gypsum powder into water according to the parts by weight, uniformly dispersing, then adding the gypsum powder while stirring, and uniformly stirring to obtain gypsum slurry;
and B: and D, pouring the gypsum slurry prepared in the step A into a mould, standing until the gypsum is solidified, demoulding to obtain a gypsum semi-finished product, and drying and forming to obtain the seal-cut gypsum.
In the step A, the stirring speed of adding the gypsum powder while stirring is 250rpm, and after the gypsum powder is added, the stirring is continued for 20min under the condition that the speed is 250 rpm.
And in the step B, drying and forming, namely naturally airing the gypsum semi-finished product for 8 days, or drying the gypsum semi-finished product in an oven at the temperature of 33 ℃ for 3 days until the water content is less than 0.6%.
Example 3
The seal cutting gypsum comprises the following raw materials in parts by weight:
the mesh number of the gypsum powder is 180 meshes; the defoaming agent is a Pico defoaming agent BYK-019.
The sol is 007 type building instant glue powder, which is selected from 007 type building instant glue powder of Luoyang brother glue industry materials Co.
The preparation method of the seal cutting gypsum comprises the following steps:
step A: adding the raw materials except the gypsum powder into water according to the parts by weight, uniformly dispersing, then adding the gypsum powder while stirring, and uniformly stirring to obtain gypsum slurry;
and B: and D, pouring the gypsum slurry prepared in the step A into a mould, standing until the gypsum is solidified, demoulding to obtain a gypsum semi-finished product, and drying and forming to obtain the seal-cut gypsum.
In the step A, the stirring speed of adding the gypsum powder while stirring is 500rpm, and after the gypsum powder is added, stirring is continued for 15min under the condition that the speed is 500 rpm.
And in the step B, drying and forming, namely naturally airing the gypsum semi-finished product for 10 days, or drying the gypsum semi-finished product in an oven at the temperature of 38 ℃ for 2 days until the water content is less than 0.6%.
Example 4
This embodiment differs from embodiment 2 described above in that:
the defoaming agent is a mixture consisting of a Pico defoaming agent BYK-017, a Pico defoaming agent BYK-044 and a Pico defoaming agent BYK-019 in a weight ratio of 3:2.5: 1.
Example 5
This embodiment differs from embodiment 2 described above in that:
the defoaming agent is a mixture consisting of a Pico defoaming agent BYK-017, a Pico defoaming agent BYK-044 and a Pico defoaming agent BYK-019 in a weight ratio of 3.5:2.2: 1.
Example 6
This embodiment differs from embodiment 2 described above in that:
the defoaming agent is a mixture consisting of a Pico defoaming agent BYK-017, a Pico defoaming agent BYK-044 and a Pico defoaming agent BYK-019 in a weight ratio of 4:2: 1.
Example 7
This embodiment differs from embodiment 2 described above in that:
the seal cutting gypsum also comprises 5 parts of inorganic filler, wherein each part of inorganic filler comprises silicon carbide, calcium carbonate and silicon micropowder, and the mixing weight ratio of the silicon carbide to the calcium carbonate to the silicon micropowder is 1:0.8: 3.
Example 8
This embodiment differs from embodiment 2 described above in that:
the seal cutting gypsum also comprises 8 parts of inorganic filler, wherein each part of inorganic filler comprises silicon carbide, calcium carbonate and silicon micropowder, and the mixing weight ratio of the silicon carbide to the calcium carbonate to the silicon micropowder is 1:1.2: 3.5.
Example 9
This embodiment differs from embodiment 2 described above in that:
the seal cutting gypsum also comprises 10 parts of inorganic filler, wherein each part of inorganic filler comprises silicon carbide, calcium carbonate and silicon micropowder, and the mixing weight ratio of the silicon carbide to the calcium carbonate to the silicon micropowder is 1:1.5: 4.
Example 10
This embodiment differs from embodiment 2 described above in that:
the seal cutting gypsum also comprises 5 parts of inorganic filler, wherein the inorganic filler is a composite filler microsphere subjected to coating modification treatment, and the coating modification treatment comprises the following steps:
s1: adding silicon dioxide and a dispersing agent into deionized water, and mixing and dispersing to prepare a bulk material;
s2: uniformly mixing silicon carbide, calcium carbonate and silicon micropowder to prepare mixed powder; then adding the mixed powder into deionized water, adding a coupling agent, mixing and dispersing, heating and stirring to prepare a precursor;
s3: and (4) adding the precursor prepared in the step S2 into the dispersing material prepared in the step S1, uniformly mixing, carrying out heat preservation treatment, cooling to normal temperature, and drying to obtain the composite filler microsphere.
In the step S1, the mixing weight ratio of the silicon dioxide, the dispersing agent and the deionized water is 3:1: 15; the particle size of the silicon dioxide is 50 nm.
In the step S2, the mixing weight ratio of the silicon carbide, the calcium carbonate and the silicon micropowder is 1:0.8: 3; the mixing weight ratio of the mixed powder, the coupling agent and the deionized water is 1: 0.3: 12.
in the step S2, the temperature is raised to 85 ℃ and stirring is carried out for 30min at the rotation speed of 800 rpm.
In the step S3, the mixing weight ratio of the precursor to the dispersing material is 2: 7; the temperature of the heat preservation treatment is 95 ℃, and the heat preservation time is 4 hours.
Example 11
This embodiment differs from embodiment 2 described above in that:
the seal cutting gypsum also comprises 8 parts of inorganic filler, wherein the inorganic filler is a composite filler microsphere subjected to coating modification treatment, and the coating modification treatment comprises the following steps:
s1: adding silicon dioxide and a dispersing agent into deionized water, and mixing and dispersing to prepare a bulk material;
s2: uniformly mixing silicon carbide, calcium carbonate and silicon micropowder to prepare mixed powder; then adding the mixed powder into deionized water, adding a coupling agent, mixing and dispersing, heating and stirring to prepare a precursor;
s3: and (4) adding the precursor prepared in the step S2 into the dispersing material prepared in the step S1, uniformly mixing, carrying out heat preservation treatment, cooling to normal temperature, and drying to obtain the composite filler microsphere.
In the step S1, the mixing weight ratio of the silicon dioxide, the dispersing agent and the deionized water is 4:1: 15; the particle size of the silicon dioxide is 100 nm.
In the step S2, the mixing weight ratio of the silicon carbide, the calcium carbonate and the silicon micropowder is 1:1.2: 3.5; the mixing weight ratio of the mixed powder, the coupling agent and the deionized water is 1: 0.5: 11.
in the step S2, the temperature is raised to 90 ℃ and stirring is carried out for 33min at the rotation speed of 600 rpm.
In the step S3, the mixing weight ratio of the precursor to the dispersing material is 3: 7; the temperature of the heat preservation treatment is 98 ℃, and the heat preservation time is 3 hours.
Example 12
This embodiment differs from embodiment 2 described above in that:
the seal cutting gypsum also comprises 10 parts of inorganic filler, wherein the inorganic filler is a composite filler microsphere subjected to coating modification treatment, and the coating modification treatment comprises the following steps:
s1: adding silicon dioxide and a dispersing agent into deionized water, and mixing and dispersing to prepare a bulk material;
s2: uniformly mixing silicon carbide, calcium carbonate and silicon micropowder to prepare mixed powder; then adding the mixed powder into deionized water, adding a coupling agent, mixing and dispersing, heating and stirring to prepare a precursor;
s3: and (4) adding the precursor prepared in the step S2 into the dispersing material prepared in the step S1, uniformly mixing, carrying out heat preservation treatment, cooling to normal temperature, and drying to obtain the composite filler microsphere.
In the step S1, the mixing weight ratio of the silicon dioxide, the dispersing agent and the deionized water is 5:1: 15; the particle size of the silicon dioxide is 200 nm.
In the step S2, the mixing weight ratio of the silicon carbide, the calcium carbonate and the silicon micropowder is 1:1.5: 4; the mixing weight ratio of the mixed powder, the coupling agent and the deionized water is 1:0.8: 10.
in the step S2, the temperature is raised to 95 ℃ and the stirring is carried out for 35min at the rotation speed of 400 rpm.
In the step S3, the mixing weight ratio of the precursor to the dispersing material is 4: 7; the temperature of the heat preservation treatment is 100 ℃, and the heat preservation time is 2 hours.
Comparative example 1
This embodiment differs from embodiment 2 described above in that:
the seal cutting gypsum also comprises 8 parts of inorganic filler, wherein the inorganic filler is a composite filler microsphere subjected to coating modification treatment, and the coating modification treatment comprises the following steps:
s1: adding silicon dioxide and a dispersing agent into deionized water, and mixing and dispersing to prepare a dispersed material A;
s2: adding a coupling agent into deionized water, wherein the mixing weight ratio of the coupling agent to water is 0.5:11, and uniformly dispersing to obtain a dispersion material B; then dividing the dispersing material B into three parts according to the proportion of 1:1.2:3.5, adding silicon carbide, calcium carbonate in the dispersing material B of 2.5 components and silicon micro powder in the dispersing material B of 3.5 components into the dispersing material B of 1 component, wherein the weight ratio of the silicon carbide to the calcium carbonate to the dispersing material B of 2.5 components is 1:1.2:3.5, and respectively heating and stirring to prepare a modified silicon carbide precursor, a modified calcium carbonate precursor and a modified silicon micro powder precursor;
s3: and (4) uniformly mixing the modified silicon carbide precursor, the modified calcium carbonate precursor and the modified silicon micro powder precursor prepared in the step (S2) to obtain a mixed precursor, adding the mixed precursor into the dispersed material prepared in the step (S1), uniformly mixing, carrying out heat preservation treatment, cooling at normal temperature, and drying to obtain the composite filler microsphere.
In the step S1, the mixing weight ratio of the silicon dioxide, the dispersing agent and the deionized water is 4:1: 15; the particle size of the silicon dioxide is 100 nm.
In the step S2, the temperature is raised to 90 ℃ and stirring is carried out for 33min at the rotation speed of 600 rpm.
In the step S3, the mixing weight ratio of the mixed precursor to the dispersing material is 3: 7; the temperature of the heat preservation treatment is 98 ℃, and the heat preservation time is 3 hours.
Comparative example 2
This embodiment differs from embodiment 2 described above in that:
the seal cutting gypsum also comprises 8 parts of inorganic filler, wherein the inorganic filler is a composite filler microsphere subjected to coating modification treatment, and the coating modification treatment comprises the following steps:
s1: adding silicon dioxide and a dispersing agent into deionized water, and mixing and dispersing to prepare a dispersed material A;
s2: adding a coupling agent into deionized water, wherein the mixing weight ratio of the coupling agent to water is 0.5:11, and uniformly dispersing to obtain a dispersion material B; then dividing the dispersing material B into three parts according to the weight ratio of 1:1.2:3.5, adding silicon carbide, calcium carbonate in the dispersing material B of 2.5 component and silicon micro powder in the dispersing material B of 3.5 component into the dispersing material B of 1 component, wherein the weight ratio of the silicon carbide, the calcium carbonate and the silicon micro powder is 1:1.2:3.5, respectively heating and stirring to respectively prepare a modified silicon carbide precursor, a modified calcium carbonate precursor and a modified silicon micro powder precursor;
s3: dividing the dispersed material prepared in the step S1 into three parts according to the weight ratio of 1:1.2:3.5, adding a modified silicon carbide precursor into the dispersed material A of the component 1, uniformly mixing, wherein the mixing weight ratio of the modified silicon carbide precursor to the dispersed material A is 3:7, then carrying out heat preservation treatment, cooling to normal temperature, and drying to obtain silicon dioxide-silicon carbide microspheres; adding a modified calcium carbonate precursor into the dispersed material A of the 1.2 component, wherein the mixing weight ratio of the modified calcium carbonate precursor to the dispersed material A is 3:7, then carrying out heat preservation treatment, cooling to normal temperature, and drying to obtain silicon dioxide-calcium carbonate microspheres; adding a modified silicon micropowder precursor into the dispersing material A with the 3.5 components, wherein the mixing weight ratio of the modified silicon micropowder precursor to the dispersing material A is 3:7, then carrying out heat preservation treatment, cooling to normal temperature, and drying to obtain silicon dioxide-silicon micropowder microspheres; and then mixing the silicon dioxide-silicon carbide microspheres, the silicon dioxide-calcium carbonate microspheres and the silicon dioxide-silicon micro powder microspheres to prepare the composite filler microspheres.
In the step S1, the mixing weight ratio of the silicon dioxide, the dispersing agent and the deionized water is 4:1: 15; the particle size of the silicon dioxide is 100 nm.
In the step S2, the temperature is raised to 90 ℃ and stirring is carried out for 33min at the rotation speed of 600 rpm.
In the step S3, the temperature of the heat preservation treatment is 98 ℃, and the heat preservation time is 3 h.
The seal cutting gypsum prepared in the above examples 1-12 and comparative examples 1-2 was subjected to scratch hardness, compressive strength, water absorption and other performance tests, and the test results are as follows:
| scratch depth (mm) | Compressive strength (MPa) | Water absorption (%) | |
| Example 1 | 19.8 | 3.8 | 15.8 |
| Example 2 | 18.5 | 4.2 | 14.3 |
| Example 3 | 19.3 | 4.0 | 15.2 |
| Example 4 | 18.3 | 4.3 | 13.7 |
| Example 5 | 18.2 | 4.4 | 13.0 |
| Example 6 | 18.3 | 4.4 | 13.2 |
| Example 7 | 18.1 | 4.6 | 11.2 |
| Example 8 | 17.9 | 4.6 | 10.6 |
| Example 9 | 18.2 | 4.5 | 10.8 |
| Example 10 | 17.8 | 4.8 | 10.1 |
| Example 11 | 17.7 | 5.1 | 9.6 |
| Example 12 | 17.7 | 4.9 | 9.8 |
| Comparative example 1 | 17.8 | 4.8 | 10.1 |
| Comparative example 2 | 17.9 | 4.7 | 10.3 |
The above experimental tests were carried out on gypsum products of 40mm x 40 mm. The scratch hardness test is to adopt a scratch hardness tester to measure the amplitude of a scratched mark when the load is 50g, and the scratch depth of the surface of the gypsum is expressed, and the smaller the scratch depth value is, the higher the surface hardness of the gypsum is; the compressive strength is measured according to the 7 th point in the GB/T17669.3-1999 Standard for measuring the mechanical properties of building Gypsum; the water absorption test comprises the steps of firstly placing gypsum in an oven, drying the gypsum at 50 ℃ for 72 hours, taking out the gypsum, weighing the gypsum (G1), then placing the dried gypsum in water for soaking for 2 hours, taking out the gypsum, weighing the gypsum (G2), and then calculating the water absorption A according to the formula: a ═ G2-G1)/G1 × 100%.
The combination of the above table and the examples 1-3 shows that the prepared seal cutting gypsum has moderate hardness, good compressive strength, difficult whole deformation under pressure, easy seal cutting of thick, thin and shallow stroke lines on the surface, low water absorption, water permeation resistance, difficult water absorption and soft collapse, and good moisture resistance.
And in the embodiments 4 to 6, the compression strength of the prepared gypsum product is higher than that in the embodiments 1 to 3, and the water absorption is reduced, which shows that the use of the compound defoaming agent can inhibit the generation of bubbles in a gypsum preparation system, eliminate the generated bubbles, avoid the surface or the interior of the seal cutting gypsum from having a cavity phenomenon due to the existence of the bubbles in the system, avoid the reduction of the compression strength of the gypsum due to the cavity phenomenon, avoid the water accumulation in the cavity, and reduce the water absorption of the gypsum product.
Compared with the embodiment 2, the embodiment 7-8 has the advantages that the compression strength of the gypsum is obviously improved by adding the compounded inorganic filler into the gypsum, the surface scratch depth is slightly reduced, and the water absorption rate is also obviously reduced, so that the hardness and the compression strength of the gypsum can be improved, the water absorption rate is reduced, the stability of the seal cutting gypsum is improved, the seal cutting gypsum is not easily damaged by pressure or collision, the phenomenon of soft collapse caused by excessive water absorption is avoided, the surface scratch depth is reduced by 1.26-3.24%, and the surface seal cutting is only slightly influenced in an acceptable range.
Compared with the embodiment 2, the embodiment 9-12 has the advantages that the modified composite filler microspheres are added into the gypsum, so that the compressive strength of the gypsum is obviously improved, the surface scratch depth is slightly reduced, the water absorption rate is also obviously reduced, the compressive strength is obviously increased compared with the embodiment 7-8, the water absorption rate is obviously reduced compared with the embodiment 7-8, and the inorganic filler coated and modified by the microspheres can obviously improve the compressive strength of the gypsum, is not easily damaged by pressure or collision and is not easily subjected to excessive moisture absorption to cause a soft collapse phenomenon, and the surface seal cut pictures and texts can be adhered with ink to seal the pictures and texts, so that the surface soft collapse deformation caused by excessive ink absorption and the picture and text precision of the seal are not easily caused.
In addition, in examples 7-12, compared with example 2, all performance tests were performed under the scheme of a single defoaming agent, and examples 4-6 also verify that the compressive strength of the seal cutting gypsum can be improved and the water absorption can be reduced by using the compound defoaming agent, so that the compressive strength of examples 7-12 can be further improved and the water absorption of examples 7-12 can be further reduced by using the compound defoaming agent in the scheme of examples 7-12 containing inorganic filler.
The invention discloses a seal-cut gypsum prepared by the comparative examples 1 and 2, which is characterized in that the compression strength of the seal-cut gypsum is obviously lower than that of the embodiment 11, and the water absorption rate is obviously higher than that of the embodiment 11, thereby the invention modifies three inorganic fillers simultaneously, improves the inorganic phase binding force on the surface of powder, ensures stable binding between three powders, and further can coat three powders into a nuclear layer as much as possible simultaneously when coating with silicon dioxide subsequently, and improves the reinforcing effect on the gypsum. And the reinforcing effect of the prepared composite filler microspheres on the gypsum is slightly weak by respectively modifying each inorganic filler and then coating the modified inorganic filler together or respectively modifying each inorganic filler and then coating the modified inorganic filler.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (10)
1. The seal cutting gypsum is characterized in that: the feed comprises the following raw materials in parts by weight:
2. the seal cutting gypsum of claim 1, wherein: the mesh number of the gypsum powder is 140-180 meshes; the defoaming agent is at least one of a Pico defoaming agent BYK-017, a Pico defoaming agent BYK-044 and a Pico defoaming agent BYK-019; the sol is 007 type building instant glue powder.
3. The seal cutting gypsum of claim 1, wherein: the seal cutting gypsum also comprises 5-10 parts of inorganic filler, wherein each part of inorganic filler comprises silicon carbide, calcium carbonate and silicon micropowder, and the mixing weight ratio of the silicon carbide to the calcium carbonate to the silicon micropowder is 1:0.8-1.5: 3-4.
4. The seal cutting gypsum of claim 1, wherein: the seal cutting gypsum also comprises 5-10 parts of inorganic filler, wherein the inorganic filler is a composite filler microsphere subjected to coating modification treatment, and the coating modification treatment comprises the following steps:
s1: adding silicon dioxide and a dispersing agent into deionized water, and mixing and dispersing to prepare a bulk material;
s2: uniformly mixing silicon carbide, calcium carbonate and silicon micropowder to prepare mixed powder; then adding the mixed powder into deionized water, adding a coupling agent, mixing and dispersing, heating and stirring to prepare a precursor;
s3: and (4) adding the precursor prepared in the step S2 into the dispersing material prepared in the step S1, uniformly mixing, carrying out heat preservation treatment, cooling to normal temperature, and drying to obtain the composite filler microsphere.
5. The seal cutting gypsum of claim 4, wherein: in the step S1, the mixing weight ratio of the silicon dioxide, the dispersing agent and the deionized water is 3-5:1: 15; the particle size of the silicon dioxide is 50-200 nm.
6. The seal cutting gypsum of claim 4, wherein: in the step S2, the mixing weight ratio of the silicon carbide, the calcium carbonate and the silicon micropowder is 1:0.8-1.5: 3-4; the mixing weight ratio of the mixed powder, the coupling agent and the deionized water is 1: 0.3-0.8: 10-12.
7. The seal cutting gypsum of claim 4, wherein: in the step S2, the temperature raising and stirring is carried out at a temperature of 85-95 ℃ and the stirring speed of 400-800rpm for 30-35 min; in the step S3, the mixing weight ratio of the precursor to the dispersing material is 2-4: 7; the temperature of the heat preservation treatment is 95-100 ℃, and the heat preservation time is 2-4 h.
8. The method for preparing seal-cutting gypsum as claimed in any one of claims 1-7, wherein: the method comprises the following steps:
step A: adding the raw materials except the gypsum powder into water according to the parts by weight, uniformly dispersing, then adding the gypsum powder while stirring, and uniformly stirring to obtain gypsum slurry;
and B: and D, pouring the gypsum slurry prepared in the step A into a mould, standing until the gypsum is solidified, demoulding to obtain a gypsum semi-finished product, and drying and forming to obtain the seal-cut gypsum.
9. The preparation method of seal-cut gypsum according to claim 8, wherein the preparation method comprises the following steps: in the step A, the stirring speed of the gypsum powder added while stirring is 200-500rpm, and after the gypsum powder is added, the stirring is continued for 15-25min under the condition of the speed of 200-500 rpm.
10. The preparation method of seal-cut gypsum according to claim 8, wherein the preparation method comprises the following steps: and in the step B, drying and forming, namely naturally airing the gypsum semi-finished product for 6-10 days, or drying the gypsum semi-finished product in an oven at the temperature of 28-38 ℃ for 2-5 days until the water content is less than 0.6%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010976055.1A CN112125627B (en) | 2020-09-16 | 2020-09-16 | Seal-cutting gypsum and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010976055.1A CN112125627B (en) | 2020-09-16 | 2020-09-16 | Seal-cutting gypsum and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112125627A true CN112125627A (en) | 2020-12-25 |
| CN112125627B CN112125627B (en) | 2022-05-20 |
Family
ID=73846927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010976055.1A Active CN112125627B (en) | 2020-09-16 | 2020-09-16 | Seal-cutting gypsum and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112125627B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112500062A (en) * | 2020-12-26 | 2021-03-16 | 靖江市恒生混凝土制造有限公司 | Self-compacting concrete prepared from recycled aggregate and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080223258A1 (en) * | 2007-03-12 | 2008-09-18 | Robert Bruce | Method and System for Manufacturing Lightweight, High-Strength Gypsum Products |
| CN105153750A (en) * | 2015-07-02 | 2015-12-16 | 青阳县恒祥炉料有限公司 | Wear-resistant surface modified calcium carbonate filler and preparation method thereof |
| CN105365469A (en) * | 2014-08-29 | 2016-03-02 | 北新集团建材股份有限公司 | Manufacturing method of decorative gypsum board |
| CN108821725A (en) * | 2018-08-30 | 2018-11-16 | 荆门千年健医疗保健科技有限公司 | A kind of gypsum jade product and preparation method thereof |
| CN110922149A (en) * | 2019-11-19 | 2020-03-27 | 荆门千年健医疗保健科技有限公司 | High-toughness high-strength gypsum product and preparation method thereof |
-
2020
- 2020-09-16 CN CN202010976055.1A patent/CN112125627B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080223258A1 (en) * | 2007-03-12 | 2008-09-18 | Robert Bruce | Method and System for Manufacturing Lightweight, High-Strength Gypsum Products |
| CN105365469A (en) * | 2014-08-29 | 2016-03-02 | 北新集团建材股份有限公司 | Manufacturing method of decorative gypsum board |
| CN105153750A (en) * | 2015-07-02 | 2015-12-16 | 青阳县恒祥炉料有限公司 | Wear-resistant surface modified calcium carbonate filler and preparation method thereof |
| CN108821725A (en) * | 2018-08-30 | 2018-11-16 | 荆门千年健医疗保健科技有限公司 | A kind of gypsum jade product and preparation method thereof |
| CN110922149A (en) * | 2019-11-19 | 2020-03-27 | 荆门千年健医疗保健科技有限公司 | High-toughness high-strength gypsum product and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 葛涛等编著: "《功能性塑料母料生产技术》", 30 June 2006, 中国轻工业出版社 * |
| 赵郧安主编: "《中学美术教材研究与教学设计》", 28 February 2011, 陕西师范大学出版总社有限公司 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112500062A (en) * | 2020-12-26 | 2021-03-16 | 靖江市恒生混凝土制造有限公司 | Self-compacting concrete prepared from recycled aggregate and preparation method thereof |
| CN112500062B (en) * | 2020-12-26 | 2021-12-21 | 靖江市恒生混凝土制造有限公司 | Self-compacting concrete prepared from recycled aggregate and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112125627B (en) | 2022-05-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111423759B (en) | Exterior wall waterproof putty and preparation method thereof | |
| KR102270193B1 (en) | Cement-based composition and additive manufacturing method for 3D printing architectural exterior finishing materials | |
| CN112125627B (en) | Seal-cutting gypsum and preparation method thereof | |
| CN110342898B (en) | Composite magnesium oxysulfate cementing material for 3D printing and preparation method and application thereof | |
| CN111393054B (en) | Low-alkali-excitation water-resistant geopolymer material, preparation method thereof and application thereof in building decorative plate | |
| CN109384437B (en) | Hybrid fiber cement-based composite material for 3D printing and preparation method thereof | |
| CN109455973B (en) | Thixotropic agent suitable for 3D printing of sulphoaluminate cement-based material | |
| CN111848042A (en) | Wallboard bonding mortar and preparation method thereof | |
| CN107129629A (en) | A kind of redispersible latex powder and preparation method thereof | |
| CN112608115A (en) | Self-leveling mortar and preparation process thereof | |
| CN108342170A (en) | Aqueous, environmental protective glue for tile, preparation method and applications | |
| CN114276096A (en) | Dry mixing material for square-material type inorganic artificial stone, inorganic artificial stone and preparation method | |
| CN106747018B (en) | Well cementation latex cement slurry system and preparation method thereof | |
| CN114163881B (en) | Single-component ceramic tile back gluing composition and application thereof | |
| CN112960985B (en) | Liquid dispergation enhancer and preparation method thereof | |
| CN112143324B (en) | Preparation process of waterproof antique carved gypsum decorative board | |
| CN111187018B (en) | Foaming cement reinforcing agent and foaming cement using same | |
| CN113979691A (en) | High-performance multicolor series inorganic artificial stone and production process thereof | |
| CN113185220A (en) | Lightweight concrete | |
| CN112759298A (en) | Material for powder 3D printing test model and preparation method thereof | |
| JP3349269B2 (en) | Plaster composition for inorganic boards | |
| CN106313264B (en) | A kind of preparation method of bamboo and wood composite polyurethane expanded material wood-based plate | |
| CN114231065B (en) | In-situ accelerated carbonation lime-based coating and preparation and use methods thereof | |
| CN112047730B (en) | Preparation method of photo-curing diatomite ceramic paste | |
| CN114988740B (en) | Mud-resistant admixture and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |