CN111943624A - Thistle board with fire prevention impact resistance - Google Patents
Thistle board with fire prevention impact resistance Download PDFInfo
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- CN111943624A CN111943624A CN202010835308.3A CN202010835308A CN111943624A CN 111943624 A CN111943624 A CN 111943624A CN 202010835308 A CN202010835308 A CN 202010835308A CN 111943624 A CN111943624 A CN 111943624A
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- gypsum
- gypsum board
- paper
- powder
- fire
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
- B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B13/08—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/675—Oxides, hydroxides or carbonates
-
- 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
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
- C04B2111/0062—Gypsum-paper board like 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
- 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
- C04B2111/2038—Resistance against physical degradation
-
- 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
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a paper-surface gypsum board with fireproof and impact-resistant properties, which consists of a gypsum board and protective paper adhered to the upper surface and the lower surface of the gypsum board; the gypsum board comprises the following components in percentage by weight: 6-10% of modified starch, 0.2-0.5% of retarder, 0.1-0.2% of water reducing agent, 0.8-2.5% of air entraining agent, 1-2% of bonite, 10-15% of corundum powder and desulfurized gypsum powder. In order to achieve super-strong fireproof performance, corundum powder, modified starch and bonite with the fire-resistant temperature of more than 1500 ℃ are added into the gypsum board; in order to achieve better impact resistance, the Bonet is added into the gypsum board, a small amount of micro-nano magnesium aluminum hydrotalcite is added into the facing paper, and the impact resistance of the gypsum board can be obviously improved by combining the Bonet and the facing paper; meanwhile, the micro-nano magnesium aluminum hydrotalcite is also beneficial to improving the bonding property between the mask paper and the gypsum board.
Description
Technical Field
The invention relates to the technical field of gypsum boards, in particular to a paper-surface gypsum board with fireproof and impact-resistant properties.
Background
The paper-surface gypsum board is a building material which is prepared by taking gypsum as a main raw material to obtain a board core and coating protective paper on two surfaces, and can be divided into water resistance, fire resistance, sound absorption, phase change and the like according to the use function. Because of its light weight and easy construction, it is widely used in partition walls and suspended ceilings of buildings.
The fire resistance of the thistle board mainly comprises fire stability and fire endurance limit performance, the fire resistance of the thistle board can be classified according to the fire stability and the fire endurance limit, and the fire resistance is related to the service function of the thistle board. The water resistance properties of paper-faced gypsum board include primarily surface water absorption, and continuous relative humidity suitable for the field of use.
The reason why the strength of the gypsum plasterboard is affected when the gypsum plasterboard absorbs excessive moisture or is subjected to a large amount of fire is that the dihydrate gypsum inside the gypsum plasterboard absorbs heat when exposed to high temperature, releases crystal water, and the content of the crystal water is reduced by continuous temperature rise, thereby affecting the bonding between the gypsum plasterboards inside the gypsum plasterboard, and finally affecting the strength of the gypsum plasterboard, and the crack resistance and impact resistance of the gypsum plasterboard in a humid environment are greatly affected, so that it is necessary to research a gypsum plasterboard having fireproof and impact resistance properties.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a paper-surface gypsum board with fireproof and impact-resistant properties.
The technical scheme of the invention is as follows:
a paper-surface gypsum board with fireproof and impact-resistant properties comprises a gypsum board and protective paper adhered to the upper and lower surfaces of the gypsum board; the gypsum board comprises the following components in percentage by weight: 6-10% of modified starch, 0.2-0.5% of retarder, 0.1-0.2% of water reducing agent, 0.8-2.5% of air entraining agent, 1-2% of bonite, 10-15% of corundum powder and desulfurized gypsum powder.
Preferably, the preparation method of the modified starch comprises the following steps: adding corn starch into a kneader, controlling the temperature at 50-60 ℃, slowly adding a mixed solution consisting of epichlorohydrin and alcohol, and stirring for 30-50min to obtain the modified starch.
Preferably, the retarder is citric acid.
Preferably, the water reducing agent is a naphthalene water reducing agent.
The bonite is a novel synthetic compact refractory aggregate based on a calcium hexaluminate (CA6) mineral phase. CA6 has the following main properties: high refractoriness; low solubility in iron-containing slag; high stability in reducing atmosphere (such as carbon monoxide); the chemical stability in alkaline environment is good; low wettability to molten metal and slag (steel and non-ferrous metals).
Preferably, the air entraining agent is sodium dodecyl benzene sulfonate.
Preferably, the content of the calcium sulfate dihydrate in the desulfurized gypsum powder is more than or equal to 93 percent; the grain diameter of the corundum powder and the desulfurized gypsum powder is 250 meshes.
Preferably, the face-protecting paper contains 1-3% of micro-nano magnesium aluminum hydrotalcite.
Further preferably, the particle size of the micro-nano magnesium aluminum hydrotalcite is 0.5-5 μm.
Preferably, the preparation method of the paper-surface gypsum board with fireproof and impact-resistant properties comprises the following steps:
A. dehydrating the gypsum powder in a frying pan to convert the gypsum powder into beta-type building gypsum;
B. adding 70-100% of water into beta-type building gypsum and stirring to obtain gypsum slurry;
C. adding bonate and modified starch into the gypsum slurry, stirring uniformly, and aging for 2-3 h;
D. adding the rest raw materials, and stirring to obtain a blank;
E. and (2) flowing the blank onto a lower protective paper laid in advance from a mixer, simultaneously supplying the upper protective paper, rolling and forming into a plate, solidifying and hardening the formed plate on a solidification belt conveyor, cutting, drying and edge sawing after hardening, and finally drying the cut plate in a dryer to obtain the gypsum board.
The invention has the advantages that: the invention relates to a paper-surface gypsum board with fireproof and impact-resistant properties, which consists of a gypsum board and protective paper adhered to the upper surface and the lower surface of the gypsum board; the gypsum board comprises the following components in percentage by weight: 6-10% of modified starch, 0.2-0.5% of retarder, 0.1-0.2% of water reducing agent, 0.8-2.5% of air entraining agent, 1-2% of bonite, 10-15% of corundum powder and desulfurized gypsum powder. In order to achieve the ultra-strong fireproof performance, the corundum powder with the fire resistance temperature of more than 1500 ℃ is added into the gypsum board, in order to further improve the fireproof performance of the gypsum board, the modified starch and the Bonet are also added, and a compact net structure can be formed inside the gypsum board under the condition of high temperature, so that the effects of locking moisture and other gas components and preventing fuming are achieved, and the gypsum board is safe and reliable; in order to achieve better impact resistance, the Bonet is added into the gypsum board, a small amount of micro-nano magnesium aluminum hydrotalcite is added into the facing paper, and the impact resistance of the gypsum board can be obviously improved by combining the Bonet and the facing paper; meanwhile, the micro-nano magnesium aluminum hydrotalcite is also beneficial to improving the bonding property between the mask paper and the gypsum board.
Detailed Description
Example 1
A paper-surface gypsum board with fireproof and impact-resistant properties comprises a gypsum board and protective paper adhered to the upper and lower surfaces of the gypsum board; the gypsum board comprises the following components in percentage by weight: 8.5% of modified starch, 0.23% of citric acid, 0.15% of naphthalene water reducing agent, 1.8% of sodium dodecyl benzene sulfonate, 1.5% of bornite, 12% of corundum powder and desulfurized gypsum powder.
The preparation method of the modified starch comprises the following steps: adding corn starch into a kneader, controlling the temperature at 52 ℃, slowly adding a mixed solution consisting of epichlorohydrin and alcohol, and stirring for 35min to obtain the modified starch.
The content of calcium sulfate dihydrate in the desulfurized gypsum powder is more than or equal to 93 percent; the grain diameter of the corundum powder and the desulfurized gypsum powder is 250 meshes.
The mask paper contains 1.8% of micro-nano magnesium aluminum hydrotalcite; the particle size of the micro-nano magnesium-aluminum hydrotalcite is 0.5-5 μm.
The preparation method of the paper-surface gypsum board with fireproof and impact-resistant properties comprises the following steps:
A. dehydrating the gypsum powder in a frying pan to convert the gypsum powder into beta-type building gypsum;
B. adding 90% of water into beta-type building gypsum and stirring to obtain gypsum slurry;
C. adding the bonate and the modified starch into the gypsum slurry, stirring uniformly, and aging for 2.5 h;
D. adding the rest raw materials, and stirring to obtain a blank;
E. and (2) flowing the blank onto a lower protective paper laid in advance from a mixer, simultaneously supplying the upper protective paper, rolling and forming into a plate, solidifying and hardening the formed plate on a solidification belt conveyor, cutting, drying and edge sawing after hardening, and finally drying the cut plate in a dryer to obtain the gypsum board.
Example 2
A paper-surface gypsum board with fireproof and impact-resistant properties comprises a gypsum board and protective paper adhered to the upper and lower surfaces of the gypsum board; the gypsum board comprises the following components in percentage by weight: 10% of modified starch, 0.2% of citric acid, 0.2% of naphthalene water reducing agent, 0.8% of sodium dodecyl benzene sulfonate, 2% of bonite, 10% of corundum powder and desulfurized gypsum powder.
The preparation method of the modified starch comprises the following steps: adding corn starch into a kneader, controlling the temperature at 60 ℃, slowly adding a mixed solution consisting of epichlorohydrin and alcohol, and stirring for 30min to obtain the modified starch.
The content of calcium sulfate dihydrate in the desulfurized gypsum powder is more than or equal to 93 percent; the grain diameter of the corundum powder and the desulfurized gypsum powder is 250 meshes.
The mask paper contains 3% of micro-nano magnesium aluminum hydrotalcite; the particle size of the micro-nano magnesium-aluminum hydrotalcite is 0.5-5 μm.
The preparation method of the paper-surface gypsum board with fireproof and impact-resistant properties comprises the following steps:
A. dehydrating the gypsum powder in a frying pan to convert the gypsum powder into beta-type building gypsum;
B. adding 70% of water into beta-type building gypsum and stirring to obtain gypsum slurry;
C. adding the bonate and the modified starch into the gypsum slurry, stirring uniformly, and aging for 3 h;
D. adding the rest raw materials, and stirring to obtain a blank;
E. and (2) flowing the blank onto a lower protective paper laid in advance from a mixer, simultaneously supplying the upper protective paper, rolling and forming into a plate, solidifying and hardening the formed plate on a solidification belt conveyor, cutting, drying and edge sawing after hardening, and finally drying the cut plate in a dryer to obtain the gypsum board.
Example 3
A paper-surface gypsum board with fireproof and impact-resistant properties comprises a gypsum board and protective paper adhered to the upper and lower surfaces of the gypsum board; the gypsum board comprises the following components in percentage by weight: 6% of modified starch, 0.5% of citric acid, 0.1% of naphthalene water reducing agent, 2.5% of sodium dodecyl benzene sulfonate, 1% of bonite, 15% of corundum powder and desulfurized gypsum powder.
The preparation method of the modified starch comprises the following steps: adding corn starch into a kneader, controlling the temperature at 50 ℃, slowly adding a mixed solution consisting of epichlorohydrin and alcohol, and stirring for 50min to obtain the modified starch.
The content of calcium sulfate dihydrate in the desulfurized gypsum powder is more than or equal to 93 percent; the grain diameter of the corundum powder and the desulfurized gypsum powder is 250 meshes.
The mask paper contains 1-3% of micro-nano magnesium aluminum hydrotalcite; the particle size of the micro-nano magnesium-aluminum hydrotalcite is 0.5-5 μm.
The preparation method of the paper-surface gypsum board with fireproof and impact-resistant properties comprises the following steps:
A. dehydrating the gypsum powder in a frying pan to convert the gypsum powder into beta-type building gypsum;
B. adding 100% of water into beta-type building gypsum and stirring to obtain gypsum slurry;
C. adding the bonate and the modified starch into the gypsum slurry, stirring uniformly, and aging for 2 h;
D. adding the rest raw materials, and stirring to obtain a blank;
E. and (2) flowing the blank onto a lower protective paper laid in advance from a mixer, simultaneously supplying the upper protective paper, rolling and forming into a plate, solidifying and hardening the formed plate on a solidification belt conveyor, cutting, drying and edge sawing after hardening, and finally drying the cut plate in a dryer to obtain the gypsum board.
Comparative example 1
The bonate in example 1 was removed and the rest of the formulation and preparation method were unchanged.
Comparative example 2
The micro-nano magnesium aluminum hydrotalcite in the example 1 is removed, and the rest proportion and the preparation method are unchanged.
Physical and fire resistance tests were performed on the gypsum boards of examples 1-3 and comparative examples 1-2, and the specific test results are shown in Table 1.
The test method comprises the following steps:
the stability time in case of fire refers to the standard GB/T9775-2008;
the breaking strength and the impact resistance are determined according to the standard GB/T9775-2008;
and (4) testing the fire-retardant grade according to the standard GB 50222-2017.
Table 1: physical properties and fire test results of the gypsum boards of examples 1-3 and comparative examples 1-2;
the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A paper-surface gypsum board with fireproof and impact-resistant properties is characterized by comprising a gypsum board and protective paper adhered to the upper surface and the lower surface of the gypsum board; the gypsum board comprises the following components in percentage by weight: 6-10% of modified starch, 0.2-0.5% of retarder, 0.1-0.2% of water reducing agent, 0.8-2.5% of air entraining agent, 1-2% of bonite, 10-15% of corundum powder and desulfurized gypsum powder.
2. A gypsum plasterboard having fire and impact resistance according to claim 1, wherein said modified starch is prepared by: adding corn starch into a kneader, controlling the temperature at 50-60 ℃, slowly adding a mixed solution consisting of epichlorohydrin and alcohol, and stirring for 30-50min to obtain the modified starch.
3. A paper-faced gypsum board having fire and impact resistant properties according to claim 1, wherein said set retarder is citric acid.
4. The gypsum board of claim 1, wherein the water reducing agent is a naphthalene based water reducing agent.
5. A paper-faced gypsum board having fire and impact resistant properties according to claim 1, wherein said air entraining agent is sodium dodecylbenzenesulfonate.
6. The gypsum plasterboard with fireproof and impact-resistant properties of claim 1, wherein the calcium sulfate dihydrate content of the desulfurized gypsum powder is not less than 93%; the grain diameter of the corundum powder and the desulfurized gypsum powder is 250 meshes.
7. A fire and impact resistant paper-faced gypsum board as claimed in claim 1, wherein said facing paper contains 1-3% of micro-nano magnesium aluminum hydrotalcite.
8. A gypsum plasterboard having fire and impact resistance according to claim 7, wherein the micro-nano magnesium aluminum hydrotalcite has a particle size of 0.5 to 5 μm.
9. A paper-faced gypsum board having fire and impact resistant properties according to any one of claims 1 to 8, prepared by a process comprising the steps of:
A. dehydrating the gypsum powder in a frying pan to convert the gypsum powder into beta-type building gypsum;
B. adding 70-100% of water into beta-type building gypsum and stirring to obtain gypsum slurry;
C. adding bonate and modified starch into the gypsum slurry, stirring uniformly, and aging for 2-3 h;
D. adding the rest raw materials, and stirring to obtain a blank;
E. and (2) flowing the blank onto a lower protective paper laid in advance from a mixer, simultaneously supplying the upper protective paper, rolling and forming into a plate, solidifying and hardening the formed plate on a solidification belt conveyor, cutting, drying and edge sawing after hardening, and finally drying the cut plate in a dryer to obtain the gypsum board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010835308.3A CN111943624A (en) | 2020-08-19 | 2020-08-19 | Thistle board with fire prevention impact resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010835308.3A CN111943624A (en) | 2020-08-19 | 2020-08-19 | Thistle board with fire prevention impact resistance |
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| CN111943624A true CN111943624A (en) | 2020-11-17 |
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| CN202010835308.3A Pending CN111943624A (en) | 2020-08-19 | 2020-08-19 | Thistle board with fire prevention impact resistance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023091880A1 (en) * | 2021-11-16 | 2023-05-25 | United States Gypsum Company | High salt gypsum wallboard containing salt absorbents and methods of making same |
| US11999658B2 (en) | 2021-11-16 | 2024-06-04 | United States Gypsum Company | High salt gypsum wallboard containing salt absorbents and methods of making same |
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| AU2009100765A4 (en) * | 2008-08-11 | 2009-09-10 | Csr Building Products Limited | High Density Fire-rated Paper Faced Board |
| CN106750991A (en) * | 2016-12-14 | 2017-05-31 | 湖北大洋塑胶有限公司 | PPR pipe of heat-resistant impact and preparation method thereof |
| CN107053431A (en) * | 2017-03-21 | 2017-08-18 | 宣城万佳建材股份有限公司 | A kind of high intensity, fire-proof and water-proof Thistle board and its preparation technology |
| CN107572916A (en) * | 2017-09-04 | 2018-01-12 | 谭永超 | A kind of blue bricks for ancient architecture wall reparation and preparation method thereof |
| CN110407551A (en) * | 2019-08-20 | 2019-11-05 | 湖州师范学院 | A kind of light thermal insulation board good for indoor heat insulation effect and preparation method thereof |
-
2020
- 2020-08-19 CN CN202010835308.3A patent/CN111943624A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2009100765A4 (en) * | 2008-08-11 | 2009-09-10 | Csr Building Products Limited | High Density Fire-rated Paper Faced Board |
| CN106750991A (en) * | 2016-12-14 | 2017-05-31 | 湖北大洋塑胶有限公司 | PPR pipe of heat-resistant impact and preparation method thereof |
| CN107053431A (en) * | 2017-03-21 | 2017-08-18 | 宣城万佳建材股份有限公司 | A kind of high intensity, fire-proof and water-proof Thistle board and its preparation technology |
| CN107572916A (en) * | 2017-09-04 | 2018-01-12 | 谭永超 | A kind of blue bricks for ancient architecture wall reparation and preparation method thereof |
| CN110407551A (en) * | 2019-08-20 | 2019-11-05 | 湖州师范学院 | A kind of light thermal insulation board good for indoor heat insulation effect and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023091880A1 (en) * | 2021-11-16 | 2023-05-25 | United States Gypsum Company | High salt gypsum wallboard containing salt absorbents and methods of making same |
| US11999658B2 (en) | 2021-11-16 | 2024-06-04 | United States Gypsum Company | High salt gypsum wallboard containing salt absorbents and methods of making same |
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