Method for preparing core-shell structural 'inorganic powder-elastomer'

Abstract

The invention relates to an inorganic powder preparation method by surface modification technique, in particular to a preparation method of inorganic powder-elastomer with nuclear-shell structure. The inorganic powder is added into a high speed mixer and then blended for 3 to 10 minutes. Then the precursor of unsaturated organic compound with carboxyl and estolide with 0.1 to 10 percent of the inorganic powder weight, azo evocating agent or organic peroxided evocating agent with 0.0005 to 0.3 percent of the inorganic powder weight and volatile solvent with 0 to 0.5 percent of the inorganic powder volume are added in and then blended for 5 to 60 minutes. The elastomer with 20 to 300 percent of the inorganic powder weight is plasticated on a double-roller open rubber mixing machine and then the pretreated inorganic powder is added in gradually to mix for 5 to 20 minute continuously before pelletizing and crushing. The preparation method causes the elastomer and the unsaturated organic compound with carboxyl and estolide fixedly connected on the surface of the inorganic filling to form grafted reaction, which forms the soft shell and hard nuclear structure for elastomer chemically coating the inorganic filling effectively.

Description

Technical field: [0001] The present invention relates to a method for preparing inorganic powders by using surface modification technology, in particular to a method for coating elastomers on the surface of inorganic powders to form a core-shell structure with rigid inorganic powders as the core and elastomers as the shell. Preparation method of "inorganic powder-elastomer" composite material. The method is especially suitable for the modification and preparation of ultrafine inorganic powder and nano inorganic powder. technical background [0002] Use existing polymers to develop new varieties of polymer materials through physical or chemical blending processes, or perform mechanical, electrical, optical, magnetic, and flame-retardant properties on existing polymer materials. The modification of damping properties, barrier properties and biological properties is an important aspect in the field of polymer materials. One of the important topics is the study of semi-crystal...

AI Technical Summary

Problems solved by technology

The graft polymerization method is to directly initiate the polymerization of monomers on the surface of inorganic fillers to form a "shell-core" structure in which polymers are grafted on the surface of inorganic fillers, in order to integrate the excellent properties of inorganic substances and polymers, and improve the performance of fillers and organic compounds. The compatibility of the matrix and the dispersion in it, but the reaction conditions are harsh, and the initiation of the reaction must rely on special equipment that can generate radiation, plasma, ultrasonic waves, etc., or must first use expensive compounds to introduce on the surface of the inorganic filler. Initiating group

Therefore, it is not conducive to the realization of industrialization, and the possibility of large-scale application is unlikely

Emulsion polymerization needs to sele