Method capable of realizing volume production and used for preparing micron order single-dispersibility polysiloxane microspheres

Abstract

The invention discloses a method capable of realizing volume production and used for preparing micron order single-dispersibility polysiloxane microspheres. The method comprises the following steps of (1) preparing a basic catalyst solution; (2) adding trialkoxysilane monomers into the basic catalyst solution (1) to prepare a seed solution; (3) then adding trialkoxysilane monomers into the seed solution obtained in the step (2) to perform a polycondensation reaction; performing filtering, washing and drying to obtain a finished product. The operation can be performed under the conditions of normal temperature, normal pressure and no atmosphere protection; the synthesis steps are simple; the operation is easy; synthesis equipment does not have special requirements; the volume production can be easily realized. No organic solvents polluting the environment are used in the reaction process; no dispersing agents, swellers, stabilizing agents, emulgators or the like are used; the types of reaction polymerization raw materials are few; the product purity is high; the yield is high; the cost is low; the size of the particle diameter of the microspheres can be effectively regulated through controlling the concentration of an initial seed solution; the distribution of the particle diameter of the obtained microspheres is uniform; the high-degree monodispersity is shown; the surface is regular; the degree of sphericity is high.

Description

technical field [0001] The invention relates to a method for preparing micron-scale monodisperse polyorganosiloxane microspheres that are easy to mass-produce, in particular to a micron-scale monodisperse polyorganosiloxane microsphere with controllable particle size, high purity, and easy mass production. Siloxane microspheres and methods for their preparation. Background technique [0002] Polyorganosiloxane microspheres are semi-organic and semi-inorganic polyorganosilsesquioxane hollow spherical microspheres with a three-dimensional cross-linked molecular structure and insoluble and infusible properties. Therefore, polyorganosiloxane microspheres have excellent heat resistance, optical properties, and dispersion properties. They are used as light-diffusing additives in transparent plastic materials such as PC, PMMA, and PS, thereby endowing the base material with high haze and high light transmittance. It has excellent light diffusion characteristics and has been widely...

AI Technical Summary

Problems solved by technology

The reaction conditions required by the above method are harsh, the steps are cumbersome, and the equipment selection and design are complicated, which is not conducive to the implementation of mass production of micron-sized polyorganosiloxane microspheres.

Images