Light-weight and high-strength magnesium oxysulfate foamed plate and preparation method thereof

A technology of magnesium oxysulfide foaming and light-burning magnesium oxide, which is applied in the field of building boards, can solve the problems of large bulk products, reduced final strength of products, unfavorable heat insulation and heat preservation, etc., and achieves short curing time, reduced bulk weight, thermal insulation and sound insulation. good effect

Inactive Publication Date: 2016-04-20
广东龙湖科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of surfactants contained in physical foaming, these surfactants will reduce the final strength of the product, and due to the limita

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Formula (parts by weight)

[0032] Light Burned Magnesium Oxide 40

[0033] (active magnesium oxide content>60%)

[0034] Magnesium sulfate heptahydrate solution 50

[0035] (Baume is 25-26°Bé)

[0036] Fly Ash 15

[0037] Citric acid 1.5

[0038] Concentration 8% oleic acid triethanolamine aqueous emulsion 2.0

[0039] Water Repellent 2.0

[0040] (NT10 waterproofing agent produced by Rockwood, USA)

[0041] Water reducer 0.5

[0042] (2651F water reducer produced by German BASF company)

[0043] 0.6-0.7mm polypropylene fiber 2.0

[0044] Concentration 27% hydrogen peroxide 6.0

[0045] 2. Preparation

[0046] Add 1.5kg citric acid, 2kg oleic acid triethanolamine aqueous emulsion, 2kgNT10 waterproofing agent and 2kg polypropylene fiber to 50kg magnesium sulfate heptahydrate solution while stirring, add 15kg fly ash, 40kg light-burned magnesium oxide and 0.5 After the kg2651F water reducer is stirred evenly, add 6kg of hydrogen peroxide, stir quickly for ...

Embodiment 2

[0050] 1. Formula (parts by weight)

[0051] Light Burned Magnesium Oxide 40

[0052] (active magnesium oxide content>60%)

[0053] Magnesium sulfate heptahydrate solution 40

[0054] (Baume is 25-26°Bé)

[0055] Citric acid 1.5

[0056] Concentration 8% oleic acid triethanolamine aqueous emulsion 1.5

[0057] Water Repellent 2.0

[0058] (NT10 waterproofing agent produced by Rockwood, USA)

[0059] Commercially available naphthalene-based water reducer 1.0

[0060] 0.6-0.7mm polypropylene fiber 2.0

[0061] Concentration 27% hydrogen peroxide 5.0

[0062] 2. Preparation

[0063] Add 1.5kg citric acid, 1.5kg oleic acid triethanolamine water emulsion, 2kgNT10 waterproofing agent and 2kg polypropylene fiber to 40kg magnesium sulfate heptahydrate solution while stirring, add 40kg light-burned magnesia and 1kg sodium water reducing agent after stirring evenly. After continuing to stir evenly, add 5kg of hydrogen peroxide, stir quickly for 10s, pour into the mold for foam...

Embodiment 3

[0067] 1. Formula

[0068] Light Burned Magnesium Oxide 45

[0069] (active magnesium oxide content>60%)

[0070] Magnesium sulfate heptahydrate solution 50

[0071] (Baume is 25-26°Bé)

[0072] Silica fume 5.0

[0073] 85% industrial phosphoric acid 2.0

[0074] Concentration 9% oleic acid triethanolamine aqueous emulsion 2.0

[0075] Commercially available magnesium stearate 2.5

[0076] Water reducer 0.8

[0077] (2651F water reducer produced by German BASF company)

[0078] 0.8-0.9mmde polypropylene fiber 2.5

[0079] Concentration 27% hydrogen peroxide 5.5

[0080] 2. Preparation

[0081] Add 2kg of industrial phosphoric acid with a content of 85%, 2kg of triethanolamine oleic acid aqueous emulsion, 2.5kg of magnesium stearate and 2.5kg of polypropylene fiber into 50kg of magnesium sulfate heptahydrate solution while stirring, add 5kg of silica fume, 45kg of polypropylene fiber after stirring evenly Lightly burn magnesia and 0.8kg2651F water reducer, continue sti...

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Abstract

The invention provides a light-weight and high-strength magnesium oxysulfate foamed plate which is obtained with magnesium oxysulfate as a cementing material. The foamed plate is prepared from, by weight, 40-50 parts of light-calcined magnesia, 40-50 parts of a magnesium sulfate heptahydrate solution, 1.5-3 parts of a modifying agent, 5-6 parts of a foaming agent, 1.5-2.5 parts of foam stabilizer, 1-2 parts of a waterproof agent, 0.5-1 part of a water reducing agent and 2-3 parts of polypropylene fibers. The modifying agent is prepared from one or more of citric acid, boric acid, phosphoric acid and sodium citrate. The foaming agent is hydrogen peroxide with the mass concentration being 25-30%. The foam stabilizer is triethanolamine oleate aqueous emulsion with the mass concentration being 8-10%. The absolute dry bulk density of the magnesium sulfate foamed plate is lower than 200 kg/m<3>, the absolute dry comprehensive strength is 0.7 MPa or above, a heat conduction coefficient is lower than 0.045 W/(m.K), the magnesium sulfate foamed plate has the advantages of being light in weight, high in strength, good in hole structure, good in heat-preserving and sound insulating effect, free of active magnesia and good in fire resistance and having no corrosion effect on metal, and the light-weight and high-strength magnesium oxysulfate foamed plate is particularly suitable for serving as a fireproof door and internal wall heat-preserving and heat-insulating material. The invention further provides a preparation method of the magnesium oxysulfate foamed plate.

Description

technical field [0001] The present invention relates to a building board, in particular to a board used for decoration, fire prevention, heat preservation, etc., and more particularly to a light-weight, high-strength magnesium oxysulfide foam obtained by foaming magnesium oxysulfide as a gelling material. Foam sheet. The present invention also relates to a preparation method of the magnesium oxysulfide foamed board. Background technique [0002] Magnesium oxysulfide is a kind of MgO-MgSO formed by mixing light-burned magnesium oxide and a certain concentration of magnesium sulfate solution, plus some modifiers. 4 -H 2 O Ternary gelling material. Because the magnesium oxysulfide cementitious material has the characteristics of high early strength, good fire resistance, good decoration, and does not contain chloride ions, it overcomes many disadvantages of traditional magnesium oxychloride cement, such as unstable volume, back to halogen, and metal The material has the dis...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/30C04B111/40
CPCC04B28/30C04B2111/40C04B2201/20C04B2201/32C04B2201/50C04B22/064C04B22/142C04B2103/0068C04B2103/48C04B2103/65C04B2103/302C04B16/0633C04B38/02C04B18/08C04B24/06C04B24/122C04B24/085C04B18/146
Inventor 王东洪永顺
Owner 广东龙湖科技股份有限公司
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