WO2008020561A1 - Procédé destiné à produire de la mousse de ciment magnésien durcie, mousse durcie obtenue par ce procédé, et objet moulé comprenant l'objet durci - Google Patents

Procédé destiné à produire de la mousse de ciment magnésien durcie, mousse durcie obtenue par ce procédé, et objet moulé comprenant l'objet durci Download PDF

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Publication number
WO2008020561A1
WO2008020561A1 PCT/JP2007/065612 JP2007065612W WO2008020561A1 WO 2008020561 A1 WO2008020561 A1 WO 2008020561A1 JP 2007065612 W JP2007065612 W JP 2007065612W WO 2008020561 A1 WO2008020561 A1 WO 2008020561A1
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WO
WIPO (PCT)
Prior art keywords
reducing agent
magnesia cement
cured
magnesium chloride
water reducing
Prior art date
Application number
PCT/JP2007/065612
Other languages
English (en)
Japanese (ja)
Inventor
Eigo Sugiyama
Hideyuki Hatanaka
Masato Ohtsubo
Yasushi Kogi
Hiroyuki Suzuki
Original Assignee
Nitto Boseki Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nitto Boseki Co., Ltd. filed Critical Nitto Boseki Co., Ltd.
Publication of WO2008020561A1 publication Critical patent/WO2008020561A1/fr

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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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
    • 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
    • C04B28/30—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 magnesium cements or similar cements
    • C04B28/32—Magnesium oxychloride cements, e.g. Sorel cement

Definitions

  • the present invention relates to a method for producing a magnesia cement foam cured product, a foam cured product obtained by the production method, and a molded product including the cured product. More specifically, using a specific compounding ratio of magnesium chloride and magnesium oxide, and using a carboxylic acid-based water reducing agent and a sulfonic acid-based water reducing agent at a specific weight ratio as water reducing agents, the bubble size is uniform and small.
  • a method for producing a magnesia cement foam cured product that can obtain a magnesia cement foam cured product having excellent dimensional stability, strength, water absorption, etc. even at low density, and a foam cured product obtained by the production method and
  • the present invention relates to a molded product containing the cured body.
  • magnesia cement also called magnesium oxide chloride cement
  • Portland cement As such a cement, magnesia cement (also called magnesium oxide chloride cement) is known together with the most typical Portland cement. Compared with Portland cement, this magnesia cement has features such as higher strength and adhesion to other materials, and less dust generation. It is widely used for building materials such as flooring.
  • various studies have been made so far, such as improvement of water resistance (Patent Document 1) and production of foam (Patent Document 2)!
  • cement generally has higher strength such as bending strength than gypsum, wood and fiber materials, but has a drawback of high density.
  • foam is used to reduce the density, there is a problem that it is brittle and easily broken. Furthermore, the foam has a problem that the amount of water absorption increases.
  • Patent Document 1 JP-A-56-26755
  • Patent Document 2 Japanese Patent No. 53-12927
  • the object of the present invention is to produce a magnesia cement foamed cured product having a small decrease in strength and a small amount of water absorption even when the density of the foamed material is lowered, and foam curing obtained by the production method. It is providing the molded object containing a body and its hardening body.
  • the present inventors have used magnesium chloride and magnesium oxide in a specific blending ratio, and specified a carboxylic acid-based water reducing agent and a sulfonic acid-based water reducing agent as water reducing agents.
  • a weight ratio to produce a magnesia cement foam hardened body, it is possible to obtain a magnesia cement foam hardened body that is excellent in dimensional stability, strength, water absorption, etc. even if the cell size is uniform and the density is low and the density is low.
  • the present invention was completed.
  • the present invention is a method for producing a magnesia cement foam hardened body, in which an aqueous solution of magnesium chloride is prepared, a water reducing agent and magnesium oxide are mixed in the aqueous solution, and a foaming agent is added at the next stage. And stirring to prepare an aqueous slurry, and curing the resulting aqueous slurry to produce a magnesia cement foam cured product, using magnesium oxide and magnesium chloride in a molar ratio of 7 to 13: 1
  • a water reducing agent use a carboxylic acid type water reducing agent and a sulfonic acid type water reducing agent in a weight ratio of 1: 5 to 2: 1 to obtain a uniform and small bubble size!
  • the present invention relates to a method of producing a foamed cured magnesia cement.
  • the present invention relates to a magnesia cement foam hardened body obtained by the above production method.
  • the present invention relates to a molded product containing the magnesia cement foam cured body.
  • a water reducing agent is used using magnesium chloride and magnesium oxide in a specific mixing ratio.
  • a magnetic cement foam cured body using a specific weight ratio of a carboxylic acid-based water reducing agent and a sulfonic acid-based water reducing agent, even if the density of the cured body with a uniform and small bubble size is low, An excellent magnesia cement foam hardened body with low dimensional shrinkage, excellent dimensional stability, high strength and low water absorption is obtained.
  • This magnesia cement foam hardened body can be widely used for building materials, etc. by forming it into a board shape, sheet shape, column shape, block shape or the like.
  • Magnesium chloride (MgCl) used in the present invention magnesium chloride (MgCl) used in the present invention
  • magnesium chloride hexahydrate is preferably magnesium chloride hexahydrate.
  • Magnesium chloride may replace up to 50% by weight with magnesium sulfate.
  • magnesium sulfate magnesium sulfate 7 hydrate is preferable.
  • an aqueous solution of magnesium chloride is prepared.
  • the concentration of the aqueous solution at this time is preferably 10% to 20% by weight of solid content concentration of magnesium chloride.
  • a water reducing agent is mixed in this aqueous solution.
  • a carboxylic acid type water reducing agent and a sulfonic acid type water reducing agent are used in a weight ratio of 1: 5 to 2: 1, and preferably in a ratio of 1: 4 to 3: 2.
  • the carboxylic acid-based water reducing agent include polycarboxylic acids (for example, polystreptonic acid ether-based compounds), oxycarboxylic acids (for example, sodium oxycarboxylate), and the like.
  • sulfonic acid-based water reducing agent examples include lignin sulfonic acids (for example, calcium lignin sulfonate), aromatic sulfonic acids (for example, sodium naphthalene sulfonate monoformalin condensate), melamine sulfonic acids (for example, melamine resin). Sodium sulfonate monoformalin condensate etc.)
  • magnesium oxide is mixed into the magnesium chloride aqueous solution.
  • the magnesium oxide active magnesium having high activity obtained by baking magnesium hydroxide, magnesium carbonate or the like at a high temperature is preferable.
  • magnesium oxide and magnesium chloride are used in a molar ratio of 7 to 13: 1, preferably 9 to 13: 1.
  • a foam stabilizer may be mixed together with magnesium oxide. Examples of foam stabilizers include zinc stearate, calcium stearate, barium stearate, and aluminum stearate. , Magnesium stearate, calcium laurate, barium laurate and the like. Further, reinforcing fibers such as glass fiber, carbon fiber, and synthetic resin fiber, and fillers such as one microfiber may be mixed together.
  • Phosphoric acid or a phosphoric acid compound may be further mixed into the magnesium chloride aqueous solution.
  • Examples of the phosphoric acid compound include ammonium phosphate, polyphosphate, and hexametaphosphate. By using such phosphoric acid or a phosphoric acid compound, the wet strength of the aqueous slurry prepared before curing the magnetic cement can be improved and the viscosity can be increased.
  • foaming agents include hydrogen peroxide (concentration 35% by weight is preferred! /), Sodium bicarbonate that generates carbon dioxide (reacts with acids such as hydrochloric acid during foaming), and metal aluminum powder. Can be mentioned.
  • the aqueous slurry obtained by thoroughly stirring after mixing the foaming agent has a solid content strength S of 50 wt% to 65 wt%, with the remainder being water.
  • the amount of each component in the solid content in the aqueous slurry is, for example, 90% to 95% by weight of the total amount of magnesium chloride and magnesium oxide, 0.5% to 5% by weight of the water reducing agent, It is preferable that the phosphoric acid or phosphoric acid compound is 0.1 to 5% by weight, and the foam stabilizer is 0.1 to 5% by weight.
  • the foaming agent is preferably added in an amount of 1 to 3% by weight with respect to the magnesium chloride aqueous solution after mixing the components.
  • the aqueous slurry is stirred well, poured into a suitable formwork, allowed to stand at room temperature or, if necessary, heated to about 30 ° C to 40 ° C, and dried. Use force S to obtain magnesia cement foam.
  • Bubbles in the magnesia cement foam hardened material obtained by the production method of the present invention are uniform in size and usually have a long diameter of 0.2 to 2 mm, and the difference between the long diameter and the short diameter is small. Usually smaller than 0.3mm.
  • the above-described reinforcing fiber is used.
  • various additives can be mixed as necessary.
  • inorganic lightening fillers such as glass, beads, lightweight aggregate, resin-based foam beads, silica vanolene, shirasu balloon, and expanded vermiculite can be mixed.
  • latex for example, styrene butadiene rubber, polyacrylic acid ester, ethylene vinyl acetate, polyvinyl acetate and vinyl alcohol are used as long as the fire resistance of magnesia cement is not extremely reduced.
  • Organic resins such as methenoresenololose, unsaturated polyester, epoxy resin, and urethane resin can also be added. It is also possible to mix commonly used flame retardants, colorants, mold release agents, antifungal agents, antifreeze agents, and cryogens.
  • the aqueous slurry described above when the aqueous slurry described above is cured, it can be made into a cured body of various shapes depending on the use of the resulting cured body.
  • examples of such shapes include a board shape, a sheet shape, a column shape, a cylinder shape, and a block shape.
  • the resulting molded product can be used as it is for building materials such as boards, wall materials, interior materials, outer wall materials, and other building materials. May be used in combination.
  • a glass cloth or the like can be arranged on a suitable plate, and the above aqueous slurry can be poured thereon to form a board for building materials.
  • molded products having various shapes such as a columnar shape, a block shape, a spherical shape, or a shape obtained by combining them can be obtained by a molding method such as extrusion molding or cast molding.
  • magnesia cement foam hardened body produced in the present invention as a board and use it for a building panel.
  • a building material panel is, for example, a combination of a magnesia cement foam hardened board obtained by the production method of the present invention and at least one selected from ceramic materials, metal materials, plastic materials and wooden materials. Can be manufactured.
  • ceramic materials such as rock wool plates, tile plates, stone plates, siding materials; metal materials such as stainless steel plates, plating steel plates, iron plates; urethane foam plates, thermoplastic resin plates, heat-resistant thermoplastic resins
  • Plastic materials such as boards; particle boards, plywood, wooden materials such as MDF, etc., together with the magnesium cement foamed hardened board produced in the present invention, can be used for interiors or in the usual manner using adhesives, etc.
  • An exterior building panel can be manufactured.
  • Magnesium chloride hexahydrate 146. 3 g is dissolved in water 216. Og. Next, to this magnesium chloride aqueous solution, phosphoric acid 2. Og and a carboxylic acid-based water reducing agent (Rebuild SP8SB LL, manufactured by Emmenby Co., Ltd.) 4.7 g and a sulfonic acid-based water reducing agent (Cell Flow 110 manufactured by Daiichi Pharmaceutical Co., Ltd.) 37.4 g was mixed.
  • a carboxylic acid-based water reducing agent Rebuild SP8SB LL, manufactured by Emmenby Co., Ltd.
  • a sulfonic acid-based water reducing agent Cell Flow 110 manufactured by Daiichi Pharmaceutical Co., Ltd.
  • a test specimen was obtained in the same manner as in Example 1 except that the carboxylic acid-based water reducing agent was Demol EP from Kao Corporation and the sulfonic acid-based water reducing agent was Demol N from Kao Corporation.
  • this Table 2 shows the measurement results such as the compressive strength of the specimen.
  • a test specimen was obtained in the same manner as in Example 2, except that the carboxylic acid-based water reducing agent was Demol EP from Kao Corporation and the sulfonic acid-based water reducing agent was Demol N from Kao Corporation. Table 2 shows the results of measurements such as compressive strength of this specimen.
  • a test specimen was obtained in the same manner as in Comparative Example 1 except that the carboxylic acid-based water reducing agent was Demol EP from Kao Corporation and the sulfonic acid-based water reducing agent was Demol N from Kao Corporation. Table 2 shows the results of measurements such as compressive strength of this specimen.
  • magnesia cement foam cured product obtained by the present invention has a small difference between the major axis and the minor axis where the bubble size is small, and the compressive strength is small even when the density is small. It is excellent in water absorption, and it is also excellent!
  • a slurry was obtained in the same manner as in Example 1, and a magnesia cement board having a thickness of 20 mm was produced. Next, the produced magnesia cement board was cut and cut to a width of 80 mm to produce a magnesia cement board having a thickness of 20 mm and a width of 80 mm.
  • a set of stainless steel plates that have been processed in advance to become the front and back materials of building material panels was prepared.
  • One of the set of stainless steel plates (hereinafter referred to as stainless steel plate A) can be fitted after the flat plate force S, and the other (hereinafter referred to as stainless steel plate B) can be fitted after both sides in the length direction are used as building material panels.
  • a fitting part is formed.
  • the fitting part has a substantially convex shape in which one side of the lengthwise sides protrudes from the central part in the thickness direction of the building material panel, and the remaining side has a substantially concave shape with a groove into which a substantially convex protruding part can be fitted. is there.
  • magnesia cement board cut so as to be in contact with the inside of both sides in the length direction of the stainless steel plate B was arranged so that the width direction of the magnesia cement board was the thickness direction of the building material panel.
  • an adhesive was applied to a portion of the stainless steel plate B between the two magnesia cement boards arranged on the stainless steel plate B. Further, a rock wool plate (thickness 80 mm) was inserted between the two magnesia cement boards described above and bonded to the stainless steel plate B. The space formed between the stainless steel plate B fitting and the magnesia cement board was filled with rock wool granular cotton. Adhesive was applied to the inserted rock wool plate and adhered to stainless steel plate A to produce a building material panel.
  • Figure 1 shows a cross-sectional view of the produced building material panel.
  • a slurry was obtained in the same manner as in Example 1, and a 12 mm thick magnesia cement board was produced.
  • a pair of steel plates were prepared in advance so as to become the front and back materials of the building material panel.
  • One of the pair of steel plates (hereinafter referred to as “Metsuki Steel Plate A”) is a flat plate, but the other (hereinafter referred to as “Metsuki Steel Plate B”) can be fitted after both sides in the length direction are used as building material panels.
  • a fitting part is formed.
  • the fitting part has a substantially convex shape with one of the two sides in the length direction protruding from the central part in the thickness direction of the building material panel, and the other side having a substantially concave shape with a groove into which a substantially convex protruding part can be fitted. It is.
  • an adhesive was applied to the inside of the location excluding the fitting portion of the steel plate B.
  • the cut composite plate was bonded to the portion of the steel plate B where the adhesive was applied.
  • Rock wool granular cotton was filled into the space formed between the mating part of the steel plate B and the composite plate.
  • Adhesive was applied to the inserted composite sheet, and it was bonded to Metsuki Steel Sheet A to produce a building material panel.
  • Fig. 2 shows a cross-sectional view of the produced building material panel.
  • the present invention even when the cell size is uniform and small, and the density of the cured body is low, an excellent magnetic cement having a small dimensional shrinkage ratio, excellent dimensional stability, high strength, and low water absorption.
  • a foam hardened body is obtained.
  • This magnesia cement foam hardened body can be widely used in building materials by forming it into a board, sheet, column, block, etc. In particular, it can be suitably used for producing a building material panel.
  • FIG. 1 shows a cross-sectional view of a building material panel produced in Example 6.
  • FIG. 2 shows a cross-sectional view of a building material panel produced in Example 7.

Abstract

La présente invention concerne un procédé destiné à produire une mousse de ciment magnésien durcie qui comprend les étapes consistant à : préparer une solution aqueuse de chlorure de magnésium, mélanger cette solution aqueuse avec un agent réducteur d'eau et un oxyde de magnésium, y introduire subséquemment un agent d'expansion, agiter l'ensemble des produits pour préparer une bouillie aqueuse, et durcir la bouillie aqueuse obtenue, l'oxyde de magnésium et le chlorure de magnésium étant employés en un rapport molaire de 7 à 13:1 et l'agent réducteur d'eau comprenant un agent réducteur d'eau de type acide carboxylique et un agent réducteur d'eau de type acide sulfonique en une proportion de 1:5 à 2:1 en poids. Ce procédé permet de produire une mousse de ciment magnésien durcie qui ne réduit que légèrement en force avec une densité décroissante.
PCT/JP2007/065612 2006-08-16 2007-08-09 Procédé destiné à produire de la mousse de ciment magnésien durcie, mousse durcie obtenue par ce procédé, et objet moulé comprenant l'objet durci WO2008020561A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2006221750 2006-08-16
JP2006-221750 2006-08-16
JP2006271619A JP2009256112A (ja) 2006-08-16 2006-10-03 マグネシアセメント発泡硬化体の製造法、その製造法によって得られる発泡硬化体およびその硬化体を含む成形物
JP2006-271619 2006-10-03

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WO2008020561A1 true WO2008020561A1 (fr) 2008-02-21

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TW (1) TW200829532A (fr)
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100031593A1 (en) * 2007-01-12 2010-02-11 Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg Sloping roof system and insulating board for sloping roof systems
JP2011520753A (ja) * 2008-05-20 2011-07-21 プロマト リサーチ アンド テクノロジー センター ナムローゼ フェンノートシャップ 耐久性オキシ塩化マグネシウムセメントおよびそのための方法
CN104446323A (zh) * 2014-12-11 2015-03-25 云南省化工研究院 一种可溶性固体钾盐矿采矿巷道表面喷涂防护剂速凝的方法
CN106854087A (zh) * 2016-11-10 2017-06-16 安徽新盾消防设备有限公司 无机外墙用防火保温板
CN108793911A (zh) * 2018-06-19 2018-11-13 辽宁科技大学 一种利用发泡法制备镁质轻质骨料的方法
CN113443882A (zh) * 2021-07-20 2021-09-28 吉林省优瑞佳新型建筑材料有限公司 一种轻质气凝土

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101314741B1 (ko) * 2011-10-13 2013-10-08 이동희 산화마그네슘과 이의 경화제를 이용한 상온 무기발포 성형체의 제조방법

Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS56149360A (en) * 1980-03-25 1981-11-19 Betsukuriiku Fuiritsupu Manufacture of molded goods from hydraulic mineral composite material
JPH02133381A (ja) * 1988-11-14 1990-05-22 Miyazaki Mokuzai Kogyo Kk 軽量不燃材の製造方法
JPH02208248A (ja) * 1989-02-07 1990-08-17 Centre Scient Tech Batiment マグネシウムセメント及びマグネシウムバインダー

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS56149360A (en) * 1980-03-25 1981-11-19 Betsukuriiku Fuiritsupu Manufacture of molded goods from hydraulic mineral composite material
JPH02133381A (ja) * 1988-11-14 1990-05-22 Miyazaki Mokuzai Kogyo Kk 軽量不燃材の製造方法
JPH02208248A (ja) * 1989-02-07 1990-08-17 Centre Scient Tech Batiment マグネシウムセメント及びマグネシウムバインダー

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100031593A1 (en) * 2007-01-12 2010-02-11 Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg Sloping roof system and insulating board for sloping roof systems
JP2011520753A (ja) * 2008-05-20 2011-07-21 プロマト リサーチ アンド テクノロジー センター ナムローゼ フェンノートシャップ 耐久性オキシ塩化マグネシウムセメントおよびそのための方法
CN104446323A (zh) * 2014-12-11 2015-03-25 云南省化工研究院 一种可溶性固体钾盐矿采矿巷道表面喷涂防护剂速凝的方法
CN106854087A (zh) * 2016-11-10 2017-06-16 安徽新盾消防设备有限公司 无机外墙用防火保温板
CN108793911A (zh) * 2018-06-19 2018-11-13 辽宁科技大学 一种利用发泡法制备镁质轻质骨料的方法
CN108793911B (zh) * 2018-06-19 2020-08-07 辽宁科技大学 一种利用发泡法制备镁质轻质骨料的方法
CN113443882A (zh) * 2021-07-20 2021-09-28 吉林省优瑞佳新型建筑材料有限公司 一种轻质气凝土

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TW200829532A (en) 2008-07-16

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