CN115340346A - Waterproof gypsum-based putty and preparation method thereof - Google Patents
Waterproof gypsum-based putty and preparation method thereof Download PDFInfo
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- CN115340346A CN115340346A CN202210786201.3A CN202210786201A CN115340346A CN 115340346 A CN115340346 A CN 115340346A CN 202210786201 A CN202210786201 A CN 202210786201A CN 115340346 A CN115340346 A CN 115340346A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—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
- C04B28/142—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 containing synthetic or waste calcium sulfate cements
- C04B28/144—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 containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00508—Cement paints
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- 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
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention relates to the technical field of coatings, in particular to a waterproof gypsum-based putty and a preparation method thereof. The paint comprises the following components in parts by weight: 60 to 80 portions of desulfurized gypsum, 4 to 10 portions of white cement, 5 to 10 portions of aluminate cement, 5 to 10 portions of fly ash floating bead, 3 to 10 portions of heavy calcium powder, 3 to 10 portions of talcum powder, 0.5 to 2 portions of nano silicon dioxide powder, 0.5 to 2 portions of rosin emulsified dry powder waterproof agent, 0.03 to 0.07 portion of polycarboxylic acid water reducing agent, 0.3 to 0.7 portion of retarder, 0.03 to 0.07 portion of polypropylene fiber and 0.2 to 0.5 portion of mildew preventive. The organic-inorganic composite water-proofing agent can change internal structure of gypsum to make its crystal interior produce hydrophobic film so as to reduce water absorption of gypsum, and can reduce porosity, increase density of gypsum and regulate crystal type of gypsum so as to make it possess hydraulic property, reduce water absorption of gypsum and raise strength of gypsum.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a waterproof gypsum-based putty and a preparation method thereof.
Background
In building design, walls are the core structural elements that separate the internal and external environments of a room. The wall material comprises cement blocks, sintered clay bricks, plates and the like. The coating is applied to the wall in order to protect it from extreme weather conditions and to provide a decorative effect. The interior wall putty powder is a surface filling material for pretreating construction surfaces before paint construction, and mainly aims to provide a smooth protective substrate surface by using the wall protection putty material as a sealing material so that the appearance of a finished product is suitable for paint application. The environment is required to be environment-friendly, nontoxic and harmless; the adhesive strength is high, and the adhesive is firmly bonded with special mortar for cement leveling layers and ceramic tiles; the air permeability is good; the construction opening time is long; the curing time is short; the operation is easy, and the product can be used only by stirring on site; the waterproof layer can prevent moisture and inhibit the growth of mould; is suitable for the occasions of long-term soaking and has good weather resistance.
The putty powder for the interior wall mainly comprises three materials, namely a cementing material, a powdery mineral filler and an auxiliary agent, wherein the cementing material comprises a high molecular polymer and an inorganic cementing material, the inorganic cementing material mainly comprises a cement base and a gypsum base, and the putty powder taking cement as the inorganic cementing material has the problems of high cost, saltpetering, cracking and the like which are not weather-resistant. The gypsum cementing material is a harmless and environment-friendly material and has good hygroscopicity and air permeability. The gypsum cementing material is environment-friendly, and the formed putty film has soft color tone, so the gypsum cementing material has good decorative effect. However, the existing gypsum-based putty powder has the defects of poor water resistance, low strength and the like.
CN201810387195.8 discloses a modified desulfurized gypsum exterior wall putty powder and a preparation method thereof, wherein the exterior wall putty powder is prepared by taking desulfurized gypsum as a raw material, and the addition of hydroxypropyl starch ether can improve the cohesiveness, adhesive force, water resistance, alkali resistance and aging resistance of the putty powder. But the water consumption is increased, the air content is increased, the setting time is prolonged, and the influence on the compressive strength is obvious.
Disclosure of Invention
Technical problem to be solved
In view of the defects and shortcomings of the prior art, the invention provides the waterproof gypsum-based putty and the preparation method thereof, and the rosin emulsified dry powder is added to compound the nano-silica organic-inorganic composite waterproof agent, so that the solubility of gypsum in water is reduced, the compactness of the product is improved, and the waterproof enhancement effect is achieved.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
in a first aspect, the invention provides a water-resistant gypsum-based putty, which comprises the following components in parts by weight: 60 to 80 portions of desulfurized gypsum, 4 to 10 portions of white cement, 5 to 10 portions of aluminate cement, 5 to 10 portions of fly ash floating bead, 3 to 10 portions of heavy calcium powder, 3 to 10 portions of talcum powder, 0.5 to 2 portions of nano silicon dioxide powder, 0.5 to 2 portions of rosin emulsified dry powder waterproof agent, 0.03 to 0.07 portion of polycarboxylic acid water reducing agent, 0.3 to 0.7 portion of retarder, 0.03 to 0.07 portion of polypropylene fiber and 0.2 to 0.5 portion of mildew preventive.
The desulfurized gypsum crystals used in the invention have a large porosity and are in a rod-shaped irregular arrangement structure, as shown in fig. 1. Water molecules easily enter the interior of the desulfurized gypsum, so that the mechanical property and the water resistance of the desulfurized gypsum are damaged. Adding rosin emulsified dry powder, suspending the fine spherical particles after emulsion in water to form a water-oil continuous phase, and wrapping gypsum particles in gypsum slurry. When the gypsum product is in water, the waterproof film in the fine net can block the water absorption of the gypsum product, thereby reducing the water absorption of the gypsum product. And the nano silicon dioxide is added, so that nano silicon dioxide particles in the desulfurized gypsum are used as nucleation positions, the contact area between the crystal structure and the new microcrystal formation is increased, the gypsum crystals are closely arranged into a platy structure, the porosity is lower, and the structure is more compact.
Optionally, the nano silicon dioxide is prepared by taking tetraethoxysilane as a raw material and adopting a sol-gel method.
Alternatively, the polypropylene fibers have the chemical formula [ -CH 2 --CH(CH 3 )-]- n . The chemical formula of the rosin emulsified dry powder waterproof agent is as follows: c 19 H 29 COOH。
The above polypropylene fibers can reduce cracking and contribute to strength.
Alternatively, the polycarboxylate water reducer has the formula:
CH 2 ＝CH(CH 3 )CH 2 CH 2 O(CH 2 CH 2 O) m (CH 2 CH 3 CH O) nH。
the polycarboxylate superplasticizer disclosed by the invention has a comb-shaped molecular structure, has higher steric hindrance and super-dispersibility, can exert a higher plasticizing effect under the condition of low doping amount, so that the water consumption of a system is less, the fluidity retentivity is good, and the reinforcing effect is obvious.
Optionally, the retarder is of the formula: HOOCCH 2 C(OH)(COOH)CH 2 COOH。
The addition of the retarder can effectively increase the gypsum setting time, and is beneficial to construction.
Optionally, the mold inhibitor is 1, 2-benzisothiazol-3-one. The mildew preventive prevents the growth of mildew, does not foam to generate powder, prevents falling off, and plays the roles of inhibiting the mildew, isolating moisture and leveling the wall surface.
In a second aspect, the invention provides a preparation method of a water-resistant gypsum-based putty, which is characterized by comprising the following steps: mixing desulfurized gypsum, white cement, aluminate cement, fly ash floating beads, heavy calcium powder, talcum powder and nano-silica powder, then inputting the mixture into a grinder for grinding, wherein the particle fineness after grinding is less than 0.25mm, then adding a rosin emulsified dry powder waterproof agent, a polycarboxylic acid water reducing agent, a retarder, polypropylene fibers and a mildew preventive, then inputting the mixture after grinding into a superfine grinding machine for grinding, and the particle fineness after grinding is less than 0.03mm.
(III) advantageous effects
The introduction of the nano silicon dioxide powder and the polypropylene fiber and the combination of the desulfurized gypsum with high porosity improve the compactness of the putty, optimize the internal pore structure and have strong water resistance, thereby improving the bonding strength and the crack resistance.
The organic-inorganic composite water-proofing agent can change internal structure of gypsum to make its crystal interior produce hydrophobic film so as to reduce water absorption of gypsum, and can be combined with inorganic mineral material to reduce porosity, increase density of gypsum, regulate crystal type of gypsum, make it possess hydraulicity, reduce water absorption of gypsum and raise strength of gypsum.
The introduction of the nano silicon dioxide powder and the polypropylene fiber improves the compactness of the putty and optimizes the internal pore structure, thereby improving the bonding strength and the crack resistance.
Drawings
FIG. 1 is SEM atlas of desulfurized gypsum of this invention
FIG. 2 is an X-ray diffraction pattern of desulfurized gypsum.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention by way of specific embodiments thereof. In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below. While the following shows exemplary embodiments of the invention, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the following examples, the specific structure of desulfurized gypsum used is shown in FIGS. 1 and 2. Comparing the map with a standard PDF card to obtain a CaSO peak position 4 ·2H 2 The location of O, i.e. the major constituent of the feedstock, is CaSO 4 2H2O. The results of comparison of the standard card showed that the material (desulfurized gypsum) was monoclinic, i.e., a was 10.470, b was 15.150, and c was 6.510.
The preparation method of the nano silicon dioxide comprises the following steps: the nano silicon dioxide is prepared by taking tetraethoxysilane as a raw material and adopting a sol-gel method. The reaction equation is as follows: (C) 2 H 5 O) 4 Si+2H 2 O＝4C 2 H 5 OH+SiO 2
Polypropylene fibers (isotactic polypropylene) have the formula: - [ -CH 2 --CH(CH 3 )-]- n
The chemical formula of the rosin emulsified dry powder waterproof agent is as follows: c 19 H 29 COOH
The polycarboxylic acid water reducing agent has a chemical formula: CH (CH) 2 ＝CH(CH 3 )CH 2 CH 2 O(CH 2 CH 2 O) m (CH 2 CH 3 CH O) nH
The chemical formula of the retarder is as follows: HOOCCH 2 C(OH)(COOH)CH 2 COOH
The mildew preventive comprises the following chemical components in a chemical formula: 1, 2-benzisothiazol-3-ones
Example 1
The waterproof gypsum-based putty consists of the following raw materials in parts by weight: 70 parts of desulfurized gypsum, 5 parts of white cement, 5 parts of aluminate cement, 7 parts of fly ash floating beads, 5 parts of heavy calcium carbonate powder, 5 parts of talcum powder, 1 part of nano silicon dioxide powder, 1 part of rosin emulsified dry powder waterproof agent, 0.05 part of polycarboxylic acid water reducing agent, 0.3 part of retarder, 0.05 part of polypropylene fiber and 0.2 part of mildew preventive;
the preparation method comprises the following steps:
mixing the desulfurized gypsum, the white cement, the aluminate cement, the fly ash floating bead, the heavy calcium powder, the talcum powder and the nano silicon dioxide powder in parts by weight, inputting the mixture into a pulverizer for pulverization, wherein the fineness of the pulverized particles is less than 0.25mm, adding the rosin emulsified dry powder waterproof agent, the polycarboxylic acid water reducing agent, the retarder, the polypropylene fiber and the mildew preventive, inputting the pulverized mixture into a superfine pulverizer for pulverization, and obtaining the waterproof gypsum-based putty, wherein the fineness of the pulverized particles is less than 0.03mm.
Example 2
The waterproof gypsum-based putty consists of the following raw materials in parts by weight: 80 parts of desulfurized gypsum, 4 parts of white cement, 10 parts of aluminate cement, 5 parts of fly ash floating bead, 10 parts of heavy calcium powder, 3 parts of talcum powder, 2 parts of nano silicon dioxide powder, 0.5 part of rosin emulsified dry powder waterproof agent, 0.07 part of polycarboxylic acid water reducing agent, 0.3 part of retarder, 0.07 part of polypropylene fiber and 0.2 part of mildew preventive.
The preparation method comprises the following steps: mixing the desulfurized gypsum, the white cement, the aluminate cement, the fly ash floating bead, the heavy calcium powder, the talcum powder and the nano silicon dioxide powder in parts by weight, inputting the mixture into a pulverizer for pulverization, wherein the fineness of the pulverized particles is less than 0.25mm, adding the rosin emulsified dry powder waterproof agent, the polycarboxylic acid water reducing agent, the retarder, the polypropylene fiber and the mildew preventive, inputting the pulverized mixture into a superfine pulverizer for pulverization, and packaging the pulverized mixture into a finished product of the water-resistant putty with the inner wall surface, wherein the fineness of the pulverized particles is less than 0.03mm.
Example 3
The waterproof gypsum-based putty consists of the following raw materials in parts by weight: 60 parts of desulfurized gypsum, 10 parts of white cement, 5 parts of aluminate cement, 10 parts of fly ash floating beads, 3 parts of heavy calcium carbonate powder, 10 parts of talcum powder, 0.5 part of nano silicon dioxide powder, 2 parts of rosin emulsified dry powder waterproof agent, 0.03 part of polycarboxylic acid water reducing agent, 0.7 part of retarder, 0.03 part of polypropylene fiber and 0.5 part of mildew preventive;
the preparation method comprises the following steps: mixing the desulfurized gypsum, the white cement, the aluminate cement, the fly ash floating bead, the heavy calcium powder, the talcum powder and the nano-silica powder in parts by weight, inputting the mixture into a pulverizer for pulverization, wherein the fineness of the pulverized particles is less than 0.25mm, adding the rosin emulsified dry powder waterproof agent, the polycarboxylic acid water reducing agent, the retarder, the polypropylene fiber and the mildew preventive, inputting the pulverized mixture into a superfine pulverizer for pulverizing, and the fineness of the pulverized particles is less than 0.03mm.
Comparative example 1
The other points are different from example 1 in that: the desulfurized gypsum is conventionally used porous desulfurized gypsum.
Comparative example 2
The other points are different from example 1 in that: no nano silica powder was added.
Comparative example 3
The other points are different from example 1 in that: no polypropylene fibers were added.
Comparative example 4
The other points are different from example 1 in that: rosin emulsified dry powder waterproof agent is not added.
Comparative example 5
The other points are different from example 1 in that: nano silicon dioxide powder, polypropylene fiber and rosin emulsified dry powder waterproof agent are not added.
Effects of the implementation
The performance of the putty prepared by the invention is detected according to the requirements of JG/T298-2010N type, and the detection results are shown in the following table:
TABLE 1
TABLE 2 comparative examples 1-5 Performance test
The performances of the putty obtained in the examples 1,2 and 3 all meet the JG/T298-2010N standard, and the product has remarkable water resistance. The putty has the characteristics of fine texture, quick drying, good cohesiveness, strong adhesive force, water resistance, crack resistance, long service life, and improvement of the bonding strength among all the components in the putty, so that the putty is less prone to falling off. Compared with the combination of common desulfurized gypsum and other components, the combination of the nano silicon dioxide powder, the polypropylene fiber, the rosin emulsified dry powder waterproof agent and the desulfurized gypsum can improve the waterproof performance and the bonding strength of the putty.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The waterproof gypsum-based putty is characterized by comprising the following components in parts by weight: 60 to 80 portions of desulfurized gypsum, 4 to 10 portions of white cement, 5 to 10 portions of aluminate cement, 5 to 10 portions of fly ash floating bead, 3 to 10 portions of heavy calcium powder, 3 to 10 portions of talcum powder, 0.5 to 2 portions of nano silicon dioxide powder, 0.5 to 2 portions of rosin emulsified dry powder waterproof agent, 0.03 to 0.07 portion of polycarboxylic acid water reducing agent, 0.3 to 0.7 portion of retarder, 0.03 to 0.07 portion of polypropylene fiber and 0.2 to 0.5 portion of mildew preventive.
2. The water-resistant gypsum-based render of claim 1, wherein: the nano silicon dioxide is prepared by taking tetraethoxysilane as a raw material and adopting a sol-gel method.
3. The water-resistant gypsum-based putty according to claim 1 characterized in that: the chemical formula of the polypropylene fiber is- [ -CH 2 --CH(CH 3 )-]- n . The chemical formula of the rosin emulsified dry powder waterproof agent is as follows:
C 19 H 29 COOH。
4. the water-resistant gypsum-based render of claim 1, wherein: the chemical formula of the polycarboxylic acid water reducing agent is as follows: CH (CH) 2 ＝CH(CH 3 )CH 2 CH 2 O(CH 2 CH 2 O) m (CH 2 CH 3 CH O) nH。
5. The water-resistant gypsum-based putty according to claim 1 characterized in that: the chemical formula of the retarder is as follows: HOOCCH 2 C(OH)(COOH)CH 2 COOH。
6. The water-resistant gypsum-based putty according to claim 1 characterized in that: the mildew inhibitor is 1, 2-benzisothiazole-3-ketone.
7. A method of preparing the water-resistant gypsum-based putty as defined in claim 1 which comprises the steps of: mixing desulfurized gypsum, white cement, aluminate cement, fly ash floating beads, coarse whiting powder, talcum powder and nano-silica powder, then inputting the mixture into a pulverizer for pulverization, wherein the fineness of the pulverized particles is less than 0.25mm, then adding a rosin emulsified dry powder waterproof agent, a polycarboxylic acid water reducing agent, a retarder, polypropylene fibers and a mildew preventive, and then inputting the pulverized mixture into a superfine pulverizer for pulverization, wherein the fineness of the pulverized particles is less than 0.03mm.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891980A (en) * | 2010-07-23 | 2010-11-24 | 同济大学 | Inner wall putty powder taking desulfurized gypsum as base material and method for using same |
| US20160289122A1 (en) * | 2013-11-28 | 2016-10-06 | Yoshino Gypsum Co., Ltd. | Gypsum slurry, hardened gypsum, gypsum building material, gypsum board, method of producing gypsum slurry, method of producing hardened gypsum, method of producing gypsum building material, and method of producing gypsum board |
| CN111454603A (en) * | 2020-04-30 | 2020-07-28 | 杭州蓝田涂料有限公司 | Waterproof and mildew-proof gypsum putty powder and preparation method thereof |
-
2022
- 2022-07-04 CN CN202210786201.3A patent/CN115340346A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891980A (en) * | 2010-07-23 | 2010-11-24 | 同济大学 | Inner wall putty powder taking desulfurized gypsum as base material and method for using same |
| US20160289122A1 (en) * | 2013-11-28 | 2016-10-06 | Yoshino Gypsum Co., Ltd. | Gypsum slurry, hardened gypsum, gypsum building material, gypsum board, method of producing gypsum slurry, method of producing hardened gypsum, method of producing gypsum building material, and method of producing gypsum board |
| CN111454603A (en) * | 2020-04-30 | 2020-07-28 | 杭州蓝田涂料有限公司 | Waterproof and mildew-proof gypsum putty powder and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 陈勇;: "如何驯服外墙装饰材料中的"野马"――装饰砂浆?", 涂料工业, no. 04, pages 73 - 74 * |
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