WO2020246718A1 - 석고보드용 혼화제의 제조방법 및 그에 따른 혼화제, 이를 포함하는 석고보드 형성용 조성물 - Google Patents
석고보드용 혼화제의 제조방법 및 그에 따른 혼화제, 이를 포함하는 석고보드 형성용 조성물 Download PDFInfo
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- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/20—Sulfonated aromatic compounds
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- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
- C04B24/163—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
- C04B24/2647—Polyacrylates; Polymethacrylates containing polyether side chains
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- 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
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- 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
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
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- 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
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F12/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F12/02—Monomers containing only one unsaturated aliphatic radical
- C08F12/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F12/06—Hydrocarbons
- C08F12/08—Styrene
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/34—Introducing sulfur atoms or sulfur-containing groups
- C08F8/36—Sulfonation; Sulfation
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- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/14—Hardening accelerators
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- 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
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2810/00—Chemical modification of a polymer
Definitions
- the present invention relates to a method for producing a gypsum board admixture, an admixture for gypsum board according to the method, and a composition for forming a gypsum board including the same.
- gypsum board containing sulfonated polystyrene (SPS) compounds.
- SPS sulfonated polystyrene
- Gypsum board is mainly used as an interior material for construction, because it has excellent properties of fire protection, sound insulation, and heat insulation, and is inexpensive.
- gypsum boards such as ordinary boards, hard boards, reinforced boards, and decorative boards, and the types of additives, amount of combination, and addition of reinforcing materials may vary depending on the required characteristics of each gypsum board.
- these various types of gypsum boards can be manufactured by pouring gypsum mixed with water into a base paper, adjusting the thickness and width, and then curing, cutting, and drying.
- an admixture may be used as a dispersant for dispersing gypsum in water as an additive, which can reduce the amount of water used and increase drying efficiency when manufacturing gypsum boards, thereby increasing productivity.
- a dispersant to the gypsum slurry can change the foaming foam and the size distribution of the voids left by the foam.
- dispersants can delay the hardening of the gypsum slurry and further inhibit the high-speed production of gypsum products such as wallboards. Accordingly, if the amount of dispersant is increased to improve fluidity, there is a problem that the curing time increases. If the wall board is not sufficiently cured with a cutting knife, the shape of the product is not fixed, and the board after cutting May be difficult to handle. Therefore, the line speed needs to be reduced to cure the board and maintain its shape.
- Korean Patent Laid-Open Publication No. 10-2008-7001092 discloses a dispersant that provides slurry fluidity and adequate foam size distribution.
- PCE-based dispersant alone does not form desired bubbles, so PCE-based and PNS-based admixtures are separately prepared. Start using by putting it into a mixer.
- using a mixture of PCE and PNS in advance before the addition of the admixture has a problem in that a gel is formed, so there is a limitation.
- An object of the present invention is to provide a sulfonated polystyrene (SPS)-based admixture for gypsum board to improve the properties of the admixture.
- SPS sulfonated polystyrene
- DS degree of sulfonation
- a method for preparing an admixture for gypsum board comprising a sulfonated polystyrene (SPS)-based compound by a sulfonation reaction with polystyrene and sulfuric acid.
- SPS sulfonated polystyrene
- the DS (degree of sulfonation) of the sulfonated polystyrene (SPS)-based compound is 15 to 99%.
- the sulfonation may be performed by a method of polymerization using a monomeric styrene sulfonic acid, or may be performed by a method of directly sulfonating a sulfonating agent in polystyrene, which is a polymer.
- the solvent in the sulfonation reaction is propane, butane, pentane, pentane, hexane. At least any one or more selected from cyclohexane, acetone, dibromomethane and dichlorobenzene is provided.
- At least one selected from acetic anhydride, sulfuric acid, pyrogenic sulfuric acid and sulfur trioxide is provided as a sulfonating agent in the sulfonation reaction.
- the weight average molecular weight of the polystyrene is provided with 10,000 to 800,000.
- an admixture for gypsum board manufactured according to the manufacturing method is provided.
- composition for forming a gypsum board comprising gypsum, a hardener, a light weight agent, and water in the admixture for gypsum board.
- the gypsum may be semihydrated gypsum (CaSO 4 ⁇ 1/2H 2 O).
- the composition for forming a gypsum board is provided with 0.1 to 2 parts by weight of an admixture for gypsum board, 0.1 to 1 part by weight of a hardener, 0.01 to 1 part by weight of a light weight agent, and 60 to 150 parts by weight of water, based on 100 parts by weight of gypsum. .
- the admixture for gypsum board may further include a polycarboxylate ether (PCE) compound.
- PCE polycarboxylate ether
- the weight ratio of the sulfonated polystyrene (SPS)-based compound and the polycarboxylate ether (PCE)-based compound is provided in a range of 10:90 to 90:10.
- the curing agent may include at least one or more of potassium sulfate (K 2 SO 4 ) and sodium sulfate (Na 2 SO 4 ).
- the composition for forming a gypsum board may further include a curing retardant.
- a gypsum board using the composition for forming a gypsum board is provided.
- the fluidity and setting time according to the weight average molecular weight (Mw) of the SPS-based polystyrene provided, as well as the size of bubbles, can be adjusted.
- the setting time is shortened to reduce cost and at the same time, it is possible to manufacture a quality gypsum board with improved physical properties.
- SPS sulfonated polystyrene
- a layer or member when a layer or member is said to be located "on" another layer or member, this means that not only when a layer or member is in contact with another layer or member, but also another layer or member between the two layers or members. This includes the case where another member is present.
- molecular weight means “Weight Average Molecular Weight (Mw)” unless otherwise defined.
- the C 1 -C 20 alkyl group refers to a linear or branched aliphatic hydrocarbon monovalent group having 1 to 20 carbon atoms, and specific examples include methyl group, ethyl group, propyl group, isobutyl group, sec-butyl Group, ter-butyl group, pentyl group, iso-amyl group, hexyl group, and the like.
- the C 2 -C 20 alkenyl group refers to a hydrocarbon group including one or more carbon double bonds in the middle or terminal of the C 2 -C 20 alkyl group, and specific examples thereof include ethenyl group, propenyl group, butenyl group And the like.
- the C 2 -C 20 alkynyl group refers to a hydrocarbon group including one or more carbon triple bonds in the middle or terminal of the C 2 -C 20 alkyl group, and specific examples thereof include an ethynyl group, a propynyl group, and the like. Included.
- the C 1 -C 20 alkoxy group refers to a monovalent group having the formula -OA 101 (here, A 101 is the C 1 -C 20 alkyl group), and specific examples thereof include a methoxy group, an ethoxy group And an isopropyloxy group.
- the C 3 -C 10 cycloalkyl group refers to a monovalent saturated hydrocarbon monocyclic group having 3 to 10 carbon atoms, and specific examples thereof include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and a cyclo And heptyl group.
- a C 3 -C 10 cycloalkylene group refers to a divalent group having the same structure as the C 3 -C 10 cycloalkyl group.
- the C 6 -C 20 aryl group refers to a monovalent group having a carbocyclic aromatic system having 6 to 20 carbon atoms.
- Specific examples of the C 6 -C 20 aryl group include a phenyl group, an anthracenyl group, a phenanthrenyl group, a pyrenyl group, a chrysenyl group, and a fluorenyl group.
- the C 1 -C 20 heteroaryl group contains at least one hetero atom selected from N, O, Si, P, and S as a ring-forming atom, and a monovalent group having a heterocyclic aromatic system having 1 to 20 carbon atoms Means.
- Specific examples of the C 1 -C 60 heteroaryl group include a pyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, etc. do.
- a method for preparing an admixture for gypsum board comprising a sulfonated polystyrene (SPS)-based compound represented by the following Chemical Formula 1 by a sulfonation reaction with polystyrene and sulfuric acid.
- SPS sulfonated polystyrene
- R 1 and R 2 are hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, nitro group, C 1 -C 20 alkyl group, C 2 -C 20 alkenyl group, C 2 -C 20 alky Nyl group, C 1 -C 20 alkoxy group, C 3 -C 10 cycloalkyl group, C 6 -C 20 aryl group, C 1 -C 20 heteroaryl group, monovalent non-aromatic condensed polycyclic group and monovalent non-aromatic hetero Is selected from condensed polycyclic groups,
- a 1 is an integer selected from 1 to 5
- a 2 is an integer selected from 1 to 4,
- M + is H + , Li + , Na + , K + or NH 4 + ,
- x is an integer selected from 5 to 50,000
- y is an integer selected from 0 to 50,000.
- the present invention aims to control the fluidity and setting time of the gypsum slurry used according to the degree of sulfation of a polystyrene (PS)-based compound in order to provide the above properties.
- PS polystyrene
- a degree of sulfonatiion (DS) indicating the degree of sulfation of the sulfonated polystyrene (SPS)-based compound may be 15 to 99%. Preferably, 15 to 95% may be provided.
- the range is lowered to 15% or less, there is a problem that the SPS-based compound is not dispersed in water, and when it exceeds 99%, there is a problem in that the fluidity is disadvantageous and the setting time is lengthened. Therefore, it is possible to provide an effect of improving the fluidity of the gypsum slurry and shortening the setting time in the DS range of 15 to 99%.
- the sulfonation may be performed by a method of polymerization using a monomeric styrene sulfonic acid, or may be performed by a method of directly sulfonating polystyrene as a polymer using a sulfonating agent, but is not limited thereto.
- a method of polymerization including the monomeric styrene sulfonic acid may be provided.
- a process of preparing an acetyl sulfate solution is provided.
- An acid anhydride is prepared under inactivated nitrogen conditions to prepare an acetyl sulfate solution.
- the acetyl sulfate solution may be added to prepare sulfonated polystyrene.
- the mechanism for this is as follows.
- the solvent in the sulfonation reaction is propane, butane, pentane, pentane, hexane. At least one or more selected from cyclohexane, acetone, dibromomethane, and dichlorobenzene is provided, but is not limited thereto.
- a sulfonating agent may be used for the sulfonation reaction, and in this case, at least one selected from acetic anhydride, sulfuric acid, pyrogenic sulfuric acid, and sulfur trioxide may be provided as the sulfonating agent.
- acetic anhydride sulfuric acid, pyrogenic sulfuric acid, and sulfur trioxide
- sulfuric acid and acetic anhydride may be provided to perform a sulfonation reaction.
- the weight average molecular weight of the polystyrene is 30,000 to 400,000.
- the weight average molecular weight of polystyrene is provided in the range of 35,000 to 350,000, and according to Tables 1 and 2 to be described later, it can be seen that the fluidity is improved and the setting time is shortened in the above range. Accordingly, it can be confirmed that the physical properties are improved compared to the currently commercially available PNS-based admixture.
- the cell size may also increase according to the weight average molecular weight, the cell size may be adjusted by adjusting the molecular weight as necessary.
- the present invention it is possible to control the cell size of the gypsum board according to the molecular weight within the range of the weight average molecular weight of the polystyrene of the sulfonated polystyrene (SPS)-based compound 10,000 to 800,000.
- SPS sulfonated polystyrene
- an admixture for gypsum board manufactured according to the manufacturing method is provided.
- the admixture is of an aqueous dispersion type.
- Aqueous dispersion is achieved by slowly adding the reaction solution that has gone through the activation step while adding water to a separate container and stirring.
- the content of water is not particularly limited, but in consideration of workability, etc., the admixture may be freely added within a range including 1 to 60 parts by weight based on 100 parts by weight of water in the final product.
- the admixture according to the present invention it is possible to solve the problems that have arisen in flowability and the small bubble size during the manufacture of gypsum board in providing the existing admixture for gypsum board manufacturing.
- the bubble size can be adjusted by adjusting the polystyrene molecular weight of the SPS-based compound as necessary, gypsum boards having various weights suitable for use can be manufactured without additional processes or additives.
- the composition for forming a gypsum board of the present invention includes gypsum, an admixture, a hardener, a light weight agent, and water, and the admixture is a sulfonated polystyrene (SPS) represented by the following formula (1) by a sulfonation reaction with polystyrene and sulfuric acid. ) It contains an admixture for gypsum board containing a compound.
- SPS sulfonated polystyrene
- R 1 and R 2 are hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, nitro group, C 1 -C 20 alkyl group, C 2 -C 20 alkenyl group, C 2 -C 20 alky Nyl group, C 1 -C 20 alkoxy group, C 3 -C 10 cycloalkyl group, C 6 -C 20 aryl group, C 1 -C 20 heteroaryl group, monovalent non-aromatic condensed polycyclic group and monovalent non-aromatic hetero Is selected from condensed polycyclic groups,
- a 1 is an integer selected from 1 to 5
- a 2 is an integer selected from 1 to 4,
- M + is H + , Li + , Na + , K + or NH 4 + ,
- x is an integer selected from 5 to 50,000
- y is an integer selected from 0 to 50,000.
- the gypsum included in the composition for forming a gypsum board may be semi-hydrated gypsum.
- Gypsum refers to a very soft sulfate mineral based on calcium sulfate (CaSO 4 ). Gypsum has many paper known, depending on crystal forms, of which yisuseok and (CaSO 4 ⁇ 2H 2 O) to heat to a temperature of 150 °C to 200 °C or half fired by absorbing moisture in the air gypsum (CaSO 4 ⁇ 1 /2H 2 O) can be obtained.
- the semi-hydrated gypsum may be prepared by firing raw gypsum.
- the raw material gypsum is natural gypsum or flue gas desulfurization (FGD) gypsum, phospho gypsum, titanogypsum, citrogypsum, tartarogypsum, borogypsum.
- Chemical gypsum such as lactogypsum can be used.
- recycled gypsum recovered from waste gypsum board may be used as the raw gypsum, but is not limited thereto.
- an acid or a salt thereof for example, citric acid or a salt thereof, malic acid or a salt thereof, succinic acid or a salt thereof, tartaric acid or a salt thereof, etc. may be mixed together.
- the acid or salt are mixed together, the amount of mixed water can be reduced when manufacturing gypsum board using the produced semihydrated gypsum.
- the blending amount of the acid or its salt may be 0.01 parts by weight to 10 parts by weight, or 0.1 parts by weight to 5 parts by weight, or 0.5 parts by weight to 1 part by weight based on 100 parts by weight of the raw gypsum.
- the sintering of the raw gypsum may be performed within a temperature range of 150°C to 200°C, for example, at a temperature of 160°C to 180°C.
- the sintering of the raw material gypsum may be performed using a sintering apparatus such as a kettle and a rotary kiln used in the art, and the sintering apparatus used is specially limited. no.
- the calcined hemihydrate gypsum may be further pulverized in a form suitable for use in a composition using an apparatus such as a ball mill or a tube mill.
- the composition for forming a gypsum board is based on 100 parts by weight of gypsum, 0.1 to 2 parts by weight of an admixture for gypsum board, 0.1 to 1 part by weight of a hardener, 0.01 to 1 part by weight of a light weight agent, and 60 It contains to 150 parts by weight.
- the admixture represented by Formula 1 may include 0.1 to 2 parts by weight of the gypsum board admixture, and preferably 0.1 to 1 part by weight, based on 100 parts by weight of gypsum.
- the weight average molecular weight of polystyrene provides a range of 10,000 to 800,000.
- the weight average molecular weight of the polystyrene satisfies the above range, the fluidity of the gypsum board-forming composition is high, and the effect of shortening the curing time and controlling the size of the foam can be provided.
- the admixture is a polynaphthalene sulfonate (PNS) compound, a polycarboxylate ether (PCE) compound, a lignin sulfonate compound, an alkyl It may further include at least one compound selected from arylsulfonic acid-based compounds, polyoxyethylene-based compounds, alkylaryl ether-based compounds, oxycalconic acid-based compounds, polycarboxylic acid-based compounds, and aminosulfonic acid-based compounds.
- PPS polynaphthalene sulfonate
- PCE polycarboxylate ether
- lignin sulfonate compound an alkyl
- It may further include at least one compound selected from arylsulfonic acid-based compounds, polyoxyethylene-based compounds, alkylaryl ether-based compounds, oxycalconic acid-based compounds, polycarboxylic acid-based compounds, and aminosulfonic acid-based compounds.
- PCE polycarboxylate ether
- the weight ratio of the sulfonated polystyrene (SPS)-based compound and the polycarboxylate ether (PCE)-based compound is provided in a range of 10:90 to 90:10. Preferably, it may be 40:60 to 60:40, more preferably 45:55 to 55:45. Accordingly, as can be seen from the results of Tables 1 and 2 below, a composition for forming a gypsum board having improved fluidity and setting speed compared to a conventional PNS system can be provided by using together with a polycarboxylate ether (PCE) system. .
- the composition for forming a gypsum board includes a curing agent, which promotes a hydration reaction between gypsum and water, thereby increasing the productivity of the gypsum board.
- the curing agent may include at least one of an inorganic compound and an organic compound.
- the inorganic compounds include chlorides such as calcium chloride and potassium chloride; Nitrites such as sodium nitrite and calcium nitrite; Nitrates such as sodium nitrate and calcium nitrate; Sulfates such as calcium sulfate, potassium sulfate, sodium sulfate, and aluminum sulfate; Hydroxides such as sodium hydroxide and potassium hydroxide; Carbonates such as calcium carbonate, sodium carbonate, and lithium carbonate; Silicates such as sodium silicate and potassium silicate; Alumina compounds such as aluminum hydroxide and aluminum oxide; It may be one or more selected from among.
- potassium sulfate (K 2 SO 4 ) or sodium sulfate (Na 2 SO 4 ) may be provided.
- the organic compound may include amines such as diethanolamine and triethanolamine; Calcium salts of organic acids such as calcium formate and calcium acetate; And maleic anhydride; It may be one or more selected from among.
- the composition for forming a gypsum board contains 0.1 to 1 part by weight of a hardener based on 100 parts by weight of gypsum.
- a hardener based on 100 parts by weight of gypsum.
- the composition for forming a gypsum board includes a light weight agent.
- the weighting agent controls the density of the gypsum board prepared from the gypsum board-forming composition and generates air bubbles in the gypsum board, thereby reducing the gypsum board weight.
- the light weighting agent may include a sulfate compound, a persulfate compound, a bisulfate compound, a carbonate compound, or a bicarbonate compound.
- the lightweighting agent may include ammonium persulfate ((NH 4 ) 2 S 2 O 8 ), sodium bicarbonate (NaHCO 3 ), ammonium sulfate ((NH 4 ) 2 SO 4 ), or sodium bisulfate.
- ammonium persulfate (NH 4 ) 2 S 2 O 8 )
- sodium bicarbonate NaHCO 3
- ammonium sulfate (NH 4 ) 2 SO 4 )
- sodium bisulfate sodium bisulfate.
- the light weighting agent is an alkyl sulfate compound, an alkyl ether sulfate compound, an alkyl sulfonate compound, an alkyl ether sulfonate compound, an alkyl phosphate compound, an alkyl ether phosphate compound, an alkyl carbonate compound, and an alkyl ether carbonate compound.
- Anionic surfactants such as may be included.
- the weighting agent may include anionic surfactants such as lauryl sulfonate, isotridecyl sulfonate, lauryl sulfate, isotridecyl sulfate or stearyl sulfate, but is not limited thereto.
- anionic surfactants such as lauryl sulfonate, isotridecyl sulfonate, lauryl sulfate, isotridecyl sulfate or stearyl sulfate, but is not limited thereto.
- the composition for forming a gypsum board may be from 0.01 parts by weight to 1 part by weight, and preferably, the content of the curing agent is 0.01 parts by weight based on 100 parts by weight of gypsum. To 0.1 parts by weight is provided.
- the gypsum board prepared from the gypsum board-forming composition can be controlled so that the physical properties of the gypsum board are not deteriorated due to excessive air bubbles while the gypsum board manufactured from the gypsum board-forming composition is reduced.
- the composition for forming a gypsum board contains water. The water reacts with hydration to form a hard dihydrate gypsum.
- the composition for forming a gypsum board may be provided with 60 to 150 parts by weight of water, and preferably 60 to 80 parts by weight, based on 100 parts by weight of gypsum. .
- the composition for forming a gypsum board may further include a curing retardant.
- the curing delaying agent include oxycarboxylic acids such as gluconic acid, citric acid, and glucoheptone, or inorganic salts such as sodium, potassium, calcium, magnesium, and ammonium, glucose, fructose, galactose, saccharose, and potassium.
- Sugars such as sylose, arabinose, lipose, oligosaccharide, and dextran, boric acid, and the like can be used.
- the curing retardant may be added to control the curing rate when manufacturing gypsum board, but is not limited thereto.
- the composition for forming a gypsum board may further include a strength improving agent.
- a strength improving agent for example, silica fume, fly ash, or the like may be used.
- the strength improving agent may play a role of supplementing the physical properties of the gypsum board.
- the content of the hardening retardant and the strength improving agent may be 0.1 parts by weight to 10 parts by weight, for example, 0.5 parts by weight to 5 parts by weight, based on 100 parts by weight of the gypsum board.
- a sulfonated polystyrene (SPS)-based compound including gypsum, an admixture for gypsum board, a hardener, a light weight agent, and water, and represented by the same formula 1 as described above, is prepared.
- a gypsum board using a composition for forming a gypsum board is provided.
- the description of the gypsum, a hardener, a light weight agent, a sulfonated polystyrene compound, and an admixture may be referred to as described herein.
- the gypsum board may be provided on a facing sheet and a gypsum core.
- the gypsum board comprises a first exterior material sheet, a second exterior material sheet facing the first exterior material sheet, and a gypsum core disposed between the first exterior material sheet and the second exterior material sheet.
- Each of the exterior material sheets may be a paper exterior material sheet or a fibrous exterior material sheet, but is not limited thereto, and those known in the art may be used without limitation.
- the gypsum board according to the present invention has high fluidity during manufacture and a short setting time, thereby improving productivity.
- the gypsum board includes a sulfonated polystyrene (SPS)-based compound among the admixtures, so that the cell size may be controlled during manufacture.
- SPS sulfonated polystyrene
- the gypsum board of the present invention can be appropriately molded as necessary and usefully used as a building material.
- Acetic anhydride was cooled to 0° C. under inactivated nitrogen conditions, 95 to 97% of sulfuric acid was added, followed by stirring at room temperature until a clear solution was obtained.
- the degree of sulfation (DS) of the sulfonated polystyrene (SPS)-based compound can be inferred from the amount of the acetyl sulfate solution added. If necessary, a more accurate measurement method can be measured through NMR (Nuclear magnetic resonance) spectroscopy and MALDI-ToF MS (Matrix-assisted laser desorption ionization time-of-flight mass spectrometry). You can check the contents.
- Example 1 Preparation of composition for forming gypsum board
- a sulfonated polystyrene (SPS, solution) and a polycarboxylate ether (PCE)-based compound were provided in a weight ratio of 50:50.
- the sulfonated polystyrene is according to Preparation Example 1, and in particular, for preparing the SPS-based compound, the weight average molecular weight of the provided polystyrene is 10,000.
- compositions for forming gypsum boards of Examples 2 to 6 and Comparative Example 1 were prepared in the same manner as in Example 1, except that the weight average molecular weight or compound (DS) described in Table 1 below was otherwise provided as an admixture.
- the admixture in Comparative Example 1 was a polynaphthalene sulfonate (PNS) system used by a gypsum board manufacturer, and in this case, the weight average molecular weight was 10,000.
- PPS polynaphthalene sulfonate
- Evaluation Example 1 Evaluation of flowability and apparent termination of the composition for forming gypsum board
- the composition for forming a gypsum board was injected into a circular mold having a diameter of 70 mm and a height of 40 mm, and then the diameter spread when demolded after 10 seconds was measured. At this time, the circular spread slurry was measured in three places at intervals of 60 degrees, the maximum value and the minimum value of the measurement data were added, and divided by 2 to obtain a flow value.
- Example 1 (10,000) 128.6 124.3 121 116.4 111.2 108 107.6 107.5
- Example 2 (35,000) 130 125.7 121.5 117.2 112.9 108.6 108.6 108
- Example 3 (190,000) 137 134.5 132.2 129.8 127.4 122.7 119.1 118
- Example 4 (280,000) 135 132.0 129 126 123 117 115 112
- Example 5 (350,000) 131 128.0 126 123 121 116 113 110
- Example 6 (800,000) 125.5 123.1 121.5 117 112.5 108.1 103.1 100.8 Comparative Example 1 118
- composition for forming a gypsum board is poured into a rubber mold having a width of 50 mm ⁇ 50 mm ⁇ 50 mm in height, and the hardness is measured with a Shore durometer (type D) to set the time when the measured value reaches 85. It was taken as time (apparent termination time).
- Example 1 (10,000) 129 132 135 135 140 142 145 146 Example 2 (35,000) 130 133 137 139 142 146 150 151 Example 3 (190,000) 134 136 140 143 146 151 153 156 Example 4 (280,000) 142 145 149 154 159 161 162 163 Example 5 (350,000) 147 149 155 162 169 174 178 180 Example 6 (800,000) 149 154 160 171 178 181 184 184 Comparative Example 1 161
- Evaluation Example 2 Evaluation of the bubble size of gypsum board
- a gypsum board was prepared from the gypsum board-forming composition prepared in Examples 1 to 6 and Comparative Example 1, and the cross section was observed with a microscope (500 magnification) to measure the average cell size, and the results are shown in Table 3. .
- a degree of sulfonatiion may be provided in the range of 15 to 99%.
- the gypsum board prepared from the compositions of Examples 1 to 6 can be lightened by securing a bubble size having a sufficient size, and this can also be adjusted according to the molecular weight of polystyrene. I could see that.
- SPS-based admixture as an admixture, the problem of small bubble size, which is an existing problem, can be solved, and a higher level of weight reduction can be provided compared to the conventional PNS-based admixture.
- productivity is excellent, and it is widely used as an existing admixture to provide superior physical properties than the PNS-based admixture, and of course, it can be replaced.
Abstract
Description
DS Mw | 15% | 20% | 30% | 40% | 60% | 80% | 95% | 100% |
실시예1(10,000) | 128.6 | 124.3 | 121 | 116.4 | 111.2 | 108 | 107.6 | 107.5 |
실시예2(35,000) | 130 | 125.7 | 121.5 | 117.2 | 112.9 | 108.6 | 108.6 | 108 |
실시예3(190,000) | 137 | 134.5 | 132.2 | 129.8 | 127.4 | 122.7 | 119.1 | 118 |
실시예4(280,000) | 135 | 132.0 | 129 | 126 | 123 | 117 | 115 | 112 |
실시예5(350,000) | 131 | 128.0 | 126 | 123 | 121 | 116 | 113 | 110 |
실시예6(800,000) | 125.5 | 123.1 | 121.5 | 117 | 112.5 | 108.1 | 103.1 | 100.8 |
비교예 1 | 118 |
DSMw | 15% | 20% | 30% | 40% | 60% | 80% | 95% | 100% |
실시예1(10,000) | 129 | 132 | 135 | 135 | 140 | 142 | 145 | 146 |
실시예2(35,000) | 130 | 133 | 137 | 139 | 142 | 146 | 150 | 151 |
실시예3(190,000) | 134 | 136 | 140 | 143 | 146 | 151 | 153 | 156 |
실시예4(280,000) | 142 | 145 | 149 | 154 | 159 | 161 | 162 | 163 |
실시예5(350,000) | 147 | 149 | 155 | 162 | 169 | 174 | 178 | 180 |
실시예6(800,000) | 149 | 154 | 160 | 171 | 178 | 181 | 184 | 184 |
비교예 1 | 161 |
실시예(DS 30%) | 평균 기포 크기 (mm) |
실시예1(10,000) | 0.38 |
실시예2(35,000) | 0.42 |
실시예3(190,000) | 0.55 |
실시예4(280,000) | 0.61 |
실시예5(350,000) | 0.65 |
실시예6(800,000) | 0.75 |
비교예 1 | 0.50 |
Claims (12)
- 폴리스티렌 및 황산과 술폰화반응하여, 하기 화학식 1로 표시되는 술폰화된 폴리스티렌(Sulfonated Polystyrene, SPS)계 화합물을 포함하는 석고보드용 혼화제 제조방법.<화학식 1>상기 화학식 1에서,R1 및 R2는 수소, 중수소, -F, -Cl, -Br, -I, 히드록실기, 니트로기, C1-C20알킬기, C2-C20알케닐기, C2-C20알키닐기, C1-C20알콕시기, C3-C10시클로알킬기, C6-C20아릴기, C1-C20헤테로아릴기, 1가 비-방향족 축합다환 그룹 및 1가 비-방향족 헤테로축합다환 그룹 중에서 선택되고,a1은 1 내지 5 중에서 선택된 정수이고,a2은 1 내지 4 중에서 선택된 정수이고,M+는 H+, Li+, Na+, K+ 또는 NH4 +이고,x는 5 내지 50,000 중에서 선택된 정수이고,y는 0 내지 50,000 중에서 선택된 정수이다.
- 제 1항에 있어서,상기 술폰화된 폴리스티렌(Sulfonated Polystyrene, SPS)계 화합물의 DS(degree of sulfonatiion)는 15 내지 99%인 석고보드용 혼화제 제조방법.
- 제 1항에 있어서,상기 술폰화는 모노머 스티렌 술폰산을 포함하여 중합하는 방법으로 진행되는 것인 석고보드용 혼화제 제조방법.
- 제 1항에 있어서,상기 술폰화는 폴리스티렌에 술폰화하는 방법으로 진행되는 것인 석고보드용 혼화제 제조방법.
- 제 1항에 있어서,상기 술폰화 반응에서 술폰화제로 아세트산무수물, 황산, 발열황산, 삼산화황에서 선택된 적어도 어느 하나 이상을 더 포함하는 것인 석고보드용 혼화제 제조방법.
- 제 1항에 있어서,상기 폴리스티렌의 중량평균분자량은 10,000 내지 800,000인 석고보드용 혼화제 제조방법.
- 제 1항 내지 제 6항 중 어느 한 항에 따른 제조방법에 따라 제조된 석고보드용 혼화제.
- 제 7항에 있어서,물 100 중량부에 대하여, 혼화제는 1 내지 60 중량부를 포함하는 것인 석고보드용 혼화제.
- 제 7항에 있어서,상기 석고보드용 혼화제에 석고, 경화제, 경량화제 및 물을 포함하는 석고보드형성용 조성물.
- 제 9항에 있어서,상기 혼화제는 폴리카복실레이트 에테르(PCE)계 화합물을 더 포함하는 석고보드 형성용 조성물.
- 제 9항에 있어서,술폰화된 폴리스티렌(Sulfonated Polystyrene, SPS)계 화합물 및 폴리카복실레이트 에테르(PCE)계 화합물의 중량비는 10:90 내지 90:10인 석고보드 형성용 조성물.
- 제 9항 내지 제 11항 중 어느 한 항에 따른 석고보드 형성용 조성물을 이용한 석고보드.
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JP2021572371A JP7326490B2 (ja) | 2019-06-05 | 2020-05-11 | 石膏ボード用混和剤の製造方法及びそれによる混和剤、それを含む石膏ボード形成用組成物 |
AU2020287565A AU2020287565A1 (en) | 2019-06-05 | 2020-05-11 | Preparation method for admixture for plasterboard, admixture prepared thereby, and composition for forming plasterboard comprising same |
US17/596,112 US20220227668A1 (en) | 2019-06-05 | 2020-05-11 | Preparation method for admixture for plasterboard, admixture prepared thereby, and composition for forming plasterboard comprising same |
CA3142680A CA3142680A1 (en) | 2019-06-05 | 2020-05-11 | Preparation method for admixture for plasterboard, admixture prepared thereby, and composition for forming plasterboard comprising same |
CN202080041727.8A CN113950489A (zh) | 2019-06-05 | 2020-05-11 | 石膏板用外加剂的制备方法、由此制备的外加剂以及包含该外加剂的石膏板形成用组合物 |
EP20818128.9A EP3981751A4 (en) | 2019-06-05 | 2020-05-11 | METHOD FOR PREPARING A MIXTURE FOR PLASTERBOARD, MIXTURE PREPARED BY THIS METHOD, AND COMPOSITION FOR FORMING A GYPSUM PLATE COMPRISING THE SAME |
AU2024201710A AU2024201710A1 (en) | 2019-06-05 | 2024-03-15 | Preparation method for admixture for plasterboard, admixture prepared thereby, and composition for forming plasterboard comprising same |
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