Preparation method of superfine talc powder

Abstract

The invention provides a preparation method of superfine talc powder. The preparation method has the effects of improving the interface affinity of the talc power and polymers and improving the disperse state of the talc powder filler in polymer base materials by carrying out surface modification on the talc powder. The preparation method comprises the following steps: 1) breaking raw materials; 2) milling the raw materials into fine powder with a ball mill; 3) adding water to the milled materials to prepare pulp; 4) after mixing a silane coupling agent, ethanol and stearic acid uniformly to obtain a mixture, adding the mixture to the pulped materials, stirring the materials at 80-105 DEG C for 30-60 minutes and then cooling the materials; 5) grinding the materials for 6-8 hours; and 6) drying the powder and collecting the product. The preparation method has the beneficial effects that the surface activity of the talc powder particles is improved, so that the process is simplified and the cost is reduced; the interface affinity of the talc power and the polymers is improved and the disperse state of the talc powder filler in the polymer base materials is improved, so that talc is well applied and the application field of talc is expanded.

Description

technical field [0001] The invention relates to an ultrafine pulverization method of nonmetallic minerals, in particular to a preparation method of ultrafine talcum powder. Background technique [0002] Talc powder is used as a filler to fill organic polymer materials, which can improve the rigidity, dimensional stability and lubricity of products, prevent high temperature creep, reduce wear on molding machines, and improve hardness and creep resistance of polymers through filling. At the same time, it can also improve the thermal shock resistance of the polymer, and improve the molding shrinkage of the plastic, the flexural modulus of elasticity and the tensile yield strength of the product. With the development of modern industry, higher and higher requirements are put forward for the purity, whiteness and fineness of talc powder, especially ultra-fine talc powder, which is in great demand in domestic and foreign markets. However, there is a big difference between talcu...

AI Technical Summary

Problems solved by technology

However, there is a big difference between talcum powder as an inorganic filler and organic polymer molecular materials in chemical structure and physical form, lack of affinity, so that the mixing between talcum powder and polymer is uneven and the adhesion Weak, resulting in a decrease in the mechanical properties of the product