Method for preparing modified nano montmorillonite

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...