Method for preparing modified nano montmorillonite

A technology of nano-montmorillonite and montmorillonite, which is applied in the treatment of fibrous fillers and dyed polymer organic compounds, and can solve the problems of less thermal stability reports

Inactive Publication Date: 2012-06-06
GUANGDONG GAOKEDA TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the relevant research on montmorillonite mainly focuses on the organic modification of montmorillonite with long-chain alkyl quaternary ammonium salts, which can then be used to prepare various nanocomposites to play the role of toughening, strengthening, and resistance. Burning effects, but less reports on its thermal stability, the present invention uses acrylate monomers to carry out secondary modification to montmorillonite, to improve its thermal stability, and then applied to heat stabilizers in PVC

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The first step: Concentrate H 2 SO 4 Mix with water according to the mass ratio of 1:1, and stir evenly to form an acidic composite intercalation aqueous solution;

[0021] The second step: According to the mass ratio of nano sodium-based montmorillonite (30nm) to the acidic composite intercalation aqueous solution in the first step, add montmorillonite to the above-mentioned acidic composite intercalation aqueous solution at 90°C Stir for 3 hours, filter, wash with deionized water to neutrality, filter with suction, and dry to obtain modified montmorillonite;

[0022] The third step: Disperse the primary modified montmorillonite obtained in the second step in an ethanol-deionized aqueous solution (the ethanol volume concentration is 30%), and the primary modified montmorillonite concentration in the montmorillonite mixture is 10g / L, Stir in a water bath at 60°C for 4 hours, then add dropwise titanate coupling agent (with an amount of 0.05% of the mass of montmorillonite) an...

Embodiment 2

[0032] The first step: same as Example 1;

[0033] The second step: According to the mass ratio of nano sodium-based montmorillonite (30nm) and the acidic composite intercalation aqueous solution in the first step, add montmorillonite to the above-mentioned acidic composite intercalation aqueous solution at 60°C Stir for 5h, filter, wash with deionized water to neutrality, filter with suction, and dry to obtain modified montmorillonite;

[0034] The third step: Disperse the primary modified montmorillonite obtained in the second step in an ethanol-deionized aqueous solution (the ethanol volume concentration is 30%), and the primary modified montmorillonite concentration in the montmorillonite mixture is 20g / L, Stir in a water bath at 60°C for 3 hours, then dropwise add titanate coupling agent (amount of 0.1% of the mass of montmorillonite) and keep it for 2 hours to obtain a montmorillonite mixture;

[0035] The fourth step: add methyl methacrylate to the third step montmorillonite ...

Embodiment 3

[0039] The first step: same as Example 1;

[0040] The second step: According to the mass ratio of nano sodium-based montmorillonite (60nm) and the acidic composite intercalation aqueous solution in the first step, add montmorillonite to the above-mentioned acidic composite intercalation aqueous solution at 70℃ Stir for 2h, filter, wash with deionized water to neutrality, filter with suction, and dry to obtain modified montmorillonite;

[0041] The third step: Disperse the primary modified montmorillonite obtained in the second step in an ethanol-deionized aqueous solution (the ethanol volume concentration is 30%), and the primary modified montmorillonite concentration in the montmorillonite mixture is 30g / L, Stir in a water bath at 60°C for 3 hours, then add dropwise titanate coupling agent (amount of 0.15% of the mass of montmorillonite), keep it for 2 hours, and obtain a montmorillonite mixture;

[0042] The fourth step: add methyl methacrylate to the third step montmorillonite m...

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Abstract

The invention relates to a method for preparing modified nano montmorillonite, characterized by using an intercalation/coupling secondary modification technique, using an acid composite intercalation solution as a dispersing agent, dispersing montmorillonite through using the salvation of the intercalating agent solution, then adding a certain amount of a titanate coupling agent dropwisely in the montmorillonite for surface modification, then modifying the montmorillonite by secondary intercalation through using acrylate monomers, and further dispersing the nano montmorillonite through initiating the polymerization of the acrylate monomers between the montmorillonite layers to obtain the modified nano montmorillonite finally. The modified nano montmorillonite can effectively increase the thermal stability of polrvinyl chloride (PVC).

Description

Technical field: [0001] The invention relates to a preparation method of modified nano montmorillonite and its application in polyvinyl chloride (PVC) plastic heat stabilizer. Background technique: [0002] Polyvinyl chloride (PVC) is widely used in daily production and life due to its advantages of high strength, light weight, plasticization, corrosion resistance, good insulation, and high transparency. However, PVC itself has poor thermal stability, is easy to decompose, and is easy to age. Its processing temperature is higher than its decomposition index. Therefore, an appropriate amount of heat stabilizer must be added during the processing of PVC to prevent it from being caused by heat and mechanical during processing. The degradation caused by shearing and the degradation of PVC products by heat, light and oxygen for a long time during use. [0003] Hydrotalcite heat stabilizer is a new type of inorganic PVC heat stabilizer. It has the advantages of non-toxicity, good transp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40C09C3/10C08K9/04C08K9/02C08K3/34C08L27/06
Inventor 陈伟瑜易国斌廖辉康正林静川
Owner GUANGDONG GAOKEDA TECH IND
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