A hollow glass microsphere/potassium fluoroaluminate-elastic resin composite particle and its preparation method and application

Abstract

The invention discloses a hollow glass microsphere / potassium fluoroaluminate-elastic resin compound particle and its preparation method and application. The compound particle is based on an elastic resin, and the hollow glass microsphere and potassium fluoroaluminate are uniformly distributed in the In the matrix, the volume of hollow glass microspheres and potassium fluoroaluminate accounts for 30-70% of the total volume of the composite particles, and the volume ratio of hollow glass microspheres to potassium fluoroaluminate is 3-7:7-3 . Due to the relatively coarse particle size of the compound particles, there is a large area of ​​lipophilic elastic resin on the surface, which helps prevent the compound particles from floating in the liquid polishing wheel mixture, and at the same time prevents the heavy particles from settling, improving the The homogeneity of the liquid mixture replaces the existing water-soluble salts and improves the technical performance of the polishing wheel.

Description

technical field [0001] The invention belongs to the technical field of abrasive tools, and in particular relates to a hollow glass microsphere / potassium fluoroaluminate-elastic resin composite particle and a preparation method and application thereof. Background technique [0002] At present, for the grinding / polishing of stone, glass, ceramics and other materials, unsaturated polyester resin bonded polishing wheels are widely used. The bond in the polishing wheel is unsaturated polyester resin, and the abrasives are silicon carbide, aluminum oxide, etc. It is an inert filler and an active filler, using a resin casting molding process. There are various fillers, such as fillers that can help the polishing wheel improve processing performance, enhance the grinding aid or functionality of the resin system; reduce material costs without affecting performance. Inert filler. The fillers in conventional polishing wheels are indispensable to use water-soluble salts, such as sodium...

AI Technical Summary

Problems solved by technology

Furthermore, the moisture absorption of the surface layer of the polishing wheel makes the contained moisture penetrate from the surface to the inside. If the polishing wheel is used in winter, once the ambient temperature is below 0°C, the moisture will freeze into ice, causing the volume to increase. , will cause internal cracks in the polishing wheel, which will easily cause the polishing wheel to burst during use, bringing safety hazards

Therefore, although the general water-soluble salt is relatively cheap and easy to form pores, it is inconvenient to store and poses a safety hazard.

[0004] Another way to generate cavities is to add a foaming agent to the resin binder to generate cavities by foaming before the resin is cured, but this type of foaming agent has strict requirements on the resin and is only suitable for polyurethane resin-bonded systems

[0005] Although hollow glass microspheres have been disclosed as pore-forming agents in resin-bonded abrasive tools, because the density of unsaturated polyester resin is about 1.15 g / cm 3 , while the density of hollow glass microspheres is only about 0.1-0.7g / cm 3 , and has a smooth surface and a spherical shape with good fluidity. During the manufacturing process of the abrasive tool, it is inevitable that the resin is in a liquid state. At this stage, the hollow glass microspheres will have a strong floating tendency, which seriously affects the structure of the abrasive tool. homogeneity

This phenomenon is particularly prominent in high-content resin abrasives or cast resin abrasives. Unless the resin content in the abrasive composition is reduced, the amount of abrasive or filler is increased, and the mobility of each component of the abrasive composition is reduced, the abrasive can be realized. It is a multi-component uniform structure, but this will seriously compress the design space of the abrasive tool, thus limiting the application of hollow glass microspheres