Modified anhydrous calcium sulfate and preparation method thereof

A technology of anhydrous calcium sulfate and calcium sulfate, which is applied in the treatment of dyed low-molecular organic compounds and fibrous fillers, etc. It can solve the problem of poor interface bonding performance between calcium sulfate powder and polymer materials, and poor mechanical properties of materials, etc. problem, to achieve the effect of easy adhesion and good surface activity

Active Publication Date: 2011-10-12
XIANGFU NEW BUILDING MATERIAL HUNAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the interface between unmodified calcium sulfate powder and polymer materials has poor bonding performance, and the mechanical properties of the material are very poor.

Method used

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  • Modified anhydrous calcium sulfate and preparation method thereof
  • Modified anhydrous calcium sulfate and preparation method thereof
  • Modified anhydrous calcium sulfate and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0016] The modified anhydrous calcium sulfate of the present embodiment is made from the following raw materials in parts by weight: calcium sulfate powder 7Kg, titanate coupling agent JN-114 3Kg; Products obtained by hydrothermal synthesis.

[0017] Preparation:

[0018] (1) Place the calcium sulfate powder in a constant temperature oven and dry it at 50°C for 2 hours to remove the physically adsorbed water on the surface of the calcium sulfate powder;

[0019] (2) Dissolve the calcium sulfate powder dried in step (1) in water to prepare a suspension of calcium sulfate powder with a mass concentration of 40%, heat and stir in a water bath for 5 hours, and the temperature of the water bath is 60°C;

[0020] (3) Stir the coupling agent and absolute ethanol with a mass ratio of 1:10 at 45°C for 5 hours, filter with suction 5 times, and take the filtrate until the impurities are removed; then add the titanate coupling agent-ethanol solution Add to the calcium sulfate powder sus...

Embodiment 2

[0029] The modified anhydrous calcium sulfate of the present invention is made of the following raw materials in parts by weight: calcium sulfate powder 8Kg, titanate coupling agent JN-114 2Kg; the calcium sulfate powder used is natural gypsum as raw material, and water Products obtained by thermosynthesis.

[0030] Preparation:

[0031] (1) Place the calcium sulfate powder in a constant temperature oven and dry it at 50°C for 2 hours to remove the physically adsorbed water on the surface of the calcium sulfate powder;

[0032] (2) Dissolve the calcium sulfate powder dried in step (1) in water to prepare a suspension of calcium sulfate powder with a mass concentration of 50%, heat and stir in a water bath for 6 hours, and the temperature of the water bath is 60°C;

[0033] (3) Stir the coupling agent and absolute ethanol with a mass ratio of 1:10 at 45°C for 6 hours, filter with suction 5 times, and take the filtrate until the impurities are removed; then add the titanate cou...

Embodiment 3

[0042] The modified anhydrous calcium sulfate of the present invention is made of the following raw materials in parts by weight: calcium sulfate powder 9Kg, titanate coupling agent JN-114 1Kg;

[0043] The calcium sulfate powder used is a product obtained by using natural raw gypsum as a raw material and adopting a hydrothermal synthesis method.

[0044] Preparation:

[0045] (1) Place the calcium sulfate powder in a constant temperature oven and dry it at 50°C for 5 hours to remove the physically adsorbed water on the surface of the calcium sulfate powder;

[0046] (2) Dissolve the calcium sulfate powder dried in step (1) in water to prepare a suspension of calcium sulfate powder with a mass concentration of 60%, heat and stir in a water bath for 7 hours, and the temperature of the water bath is 60°C;

[0047] (3) Stir the coupling agent and absolute ethanol with a mass ratio of 1:10 at 45°C for 7 hours, filter with suction 5 times, and take the filtrate until the impuritie...

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Abstract

The invention relates to a modified anhydrous calcium sulfate and a preparation method thereof. The modified anhydrous calcium sulfate is prepared from the following raw materials in parts by weight: 70-90 parts of calcium sulfate powder and 10-30 parts of coupling agent. The preparation method of the modified anhydrous calcium sulfate comprises the following steps: drying the calcium sulfate powder in a constant-temperature oven for 2-5 hours; preparing into a 40-60% calcium sulfate powder suspension, and heating in a water bath while stirring for 5-8 hours; dissolving the coupling agent in absolute ethanol, stirring at 30-45 DEG C for 5-7 hours, carrying out suction filtration 5 times, and collecting filtrate; then adding the coupling agent-ethanol solution to the calcium sulfate powdersuspension, stirring for 25-35 minutes, ultrasonically treating for 8-12 minutes, and then stirring for 25-35 minutes; and further carrying out suction filtration, collecting filter residues, washingwith absolute ethanol, carrying out suction filtration 5 times, and then drying to obtain the modified anhydrous calcium sulfate. The modified anhydrous calcium sulfate provided by the invention has high surface activity, and can be easily adhered to a polymer, and is particularly suitable for being used as a modifier or filler for a polymer material.

Description

technical field [0001] The invention relates to a calcium sulfate and a preparation method thereof, in particular to a modified anhydrous calcium sulfate and a preparation method thereof. Background technique [0002] Compared with other powders, calcium sulfate powder has the advantages of high temperature resistance, chemical corrosion resistance, good toughness, high strength, and strong affinity with polymers such as rubber and plastics, and the price is the lowest among powders, only titanium 1 / 200~1 / 300 of white powder, it has unparalleled cost performance compared with other powders, and its application range is very wide. It is a kind of green environmental protection material with excellent performance and low price. It has strong market competitiveness, so it is often used Used as a filler for polymer materials, it can not only endow the material with certain stiffness and dimensional stability, but also improve the thermal stability of the material and reduce the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K3/30C09C1/02C09C3/08
Inventor 刘珍如刘立文付桃梅杨志强宁勇鲁纪鸣
Owner XIANGFU NEW BUILDING MATERIAL HUNAN
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