A kind of preparation method of hollow glass microsphere with high floating rate

Abstract

The invention discloses a method for preparing hollow glass microspheres with a high floating rate. The production process and steps are as follows: 1) preparation of slurry: accurately weigh each component of basic raw materials, stable dispersant and surfactant; basically The components of raw materials are quartz, borax, calcium carbonate, sodium carbonate, sodium sulfate, sodium phosphate; 2) preparation of precursor; 3) preparation of hollow glass microspheres; 4) surface modification. The stable dispersion slurry prepared by the method of the present invention has high solid phase content and low surface tension and viscosity, which not only significantly reduces the energy consumption of spray granulation, but also prepares a precursor with a small particle size span and uniform composition, combined with a high-temperature negative pressure vitrification process The floating rate of the hollow glass microspheres is higher than 96.5% and the surface finish is high, and the hollow glass microspheres are strengthened by low-temperature circulating air. The invention has easy-to-obtain raw materials, high hollow glass microsphere forming rate, simple process, low energy consumption, low production cost and wide product application range.

Description

technical field [0001] The invention relates to an inorganic filler, in particular to a hollow glass microsphere, which can be widely used in the fields of petroleum, chemical industry, military industry, shipbuilding, automobile, aerospace, building materials, etc. Unsaturated resins, nitrile, phenolic, acrylic and other coatings, as well as inks, adhesives, sealants, emulsion explosives and other products. Background technique [0002] Hollow glass microspheres are hollow micron-sized spherical particles, which have excellent characteristics such as low density, high strength, low thermal conductivity, sound insulation, high melting point, strong stability, and good fluidity. It makes it an excellent modified material and endows the substrate with multiple functions, so it is widely used in petroleum, military industry, building materials, automobiles, plastics, paints, explosives and other industries. [0003] At present, the preparation technologies of hollow glass micr...

AI Technical Summary

Problems solved by technology

However, the preparation method uses SO 3 As a foaming agent, it is harmful to the environment and has safety risks, and the hollow glass microspheres prepared by this method are single, and the crushing strength of the hollow microspheres is 16-23MPa, and the application range is narrow

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