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Hollow glass bead-elastic resin compound grains and production method and application thereof

A hollow glass microbead, elastic resin technology, applied in manufacturing tools, metal processing equipment, grinding/polishing equipment, etc., can solve the problems of polishing wheel bursting, internal cracking of polishing wheel, hidden dangers, etc., to improve materials and processes Cost, reduced process condition requirements, beneficial effects of environmental protection

Active Publication Date: 2019-06-07
天津佐源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The defect of water-soluble salt itself is high hygroscopicity. When the polishing wheel is in a humid environment, the salt will absorb the moisture in the environment, causing the surface of the polishing wheel to absorb a large amount of water. With the prolongation of storage time, under the alternating temperature and humidity, the polishing Salt particles will recrystallize on the wheel surface, this phenomenon affects the appearance of the polishing wheel, and the enriched salt is corrosive to the surface resin
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] 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 1.15g / 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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing hollow glass microspheres-elastic resin composite particles of the present embodiment comprises the following steps:

[0042] (1) The hollow glass microspheres are added to the polyurethane, the mass ratio of the hollow glass microspheres to the polyurethane is 1:3, the shore hardness after the polyurethane is solidified is 50HD, and the particle diameter of the hollow glass microspheres is 250μm, the wall thickness is 1.5μm, stir, mix evenly, and get the mixture;

[0043] (2) Cast the mixture into the mold of the rectangular plate, scrape it evenly, and form a casting layer with a thickness of 0.3mm, then solidify at room temperature, take it out from the mold, and obtain a sheet-like elastic resin with a thickness of 0.3mm Thin plate, before reaching the peak strength of resin curing within 1-10 hours after curing, the thin plate is mechanically processed into a wire material with a width of 0.4±0.1mm; then the wire is processed into particles w...

Embodiment 2

[0046] (1) The hollow glass microspheres are added into the epoxy resin, the mass ratio of the hollow glass microspheres to the polyurethane is 1:6.5, the shore hardness after the polyurethane is cured is 40HD, and the particle size of the hollow glass microspheres is 40HD. The diameter is 10 μm, and the wall thickness is 1 μm. Stir and mix evenly to obtain a mixture;

[0047] (2) Cast the mixture into a mold of a rectangular plate, scrape and spread it evenly to form a casting layer with a thickness of 0.3 mm, then solidify at room temperature, take it out from the mold, and pulverize the particle size to 850 μm to obtain the Hollow glass microspheres-elastic resin composite particles.

[0048] The volume of the hollow glass microspheres in the hollow glass microspheres-elastic resin composite particles of this embodiment accounts for 30% of the total volume of the composite particles, and the particle density is 0.5g / cm 3 .

Embodiment 3

[0050] (1) The hollow glass microspheres are added into the epoxy resin, the mass ratio of the hollow glass microspheres to the polyurethane is 1:10, the shore hardness after the polyurethane is cured is 80HD, and the particle size of the hollow glass microspheres is 80HD. The diameter is 130 μm, the wall thickness is 2 μm, stir and mix evenly to obtain a mixture;

[0051] (2) Cast the mixture into a mold of a rectangular plate, scrape and spread it evenly to form a casting layer with a thickness of 0.3 mm, then solidify at room temperature, take it out from the mold, and pulverize the particle size to 1500 μm to obtain the Hollow glass microspheres-elastic resin composite particles.

[0052] The volume of the hollow glass microspheres in the hollow glass microspheres-elastic resin composite particles of this embodiment accounts for 70% of the total volume of the composite particles, and the particle density is 0.9 / cm 3 .

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Abstract

The invention discloses hollow glass bead-elastic resin compound grains and a production method and application thereof. Elastic resin is used as a matrix of the compound grains, hollow glass beads are evenly distributed in the matrix, and the volume of the hollow glass beads accounts for 30-70% of the total volume of the compound grains. According to the hollow glass bead-elastic resin compound grains, the grain size of the compound grains is large, and the large-area lipophilic elastic resin is on the surfaces of the compound grains, is conducive to preventing compound grain floatation in aliquid polishing wheel mixture, and plays a part in obstructing sedimentation of heavy particles at the same time, so that the homogeneity of the liquid mixture is improved, existing water-soluble salt is replaced, and the technical performance of a polishing wheel is improved; and the produced polishing wheel plays a part in vibration absorption and noise reduction due to the hollow glass beads in the polishing wheel, so that high-decibel noise occurs during polishing is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of abrasive tools, and in particular relates to a hollow glass microsphere-elastic resin compound 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 chloride, potassium chlori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08L75/04C08K13/04C08K5/098C08K7/28C08K3/34C08K3/26C08K3/22C08K3/40B24D18/00B24D3/34
Inventor 李珮豪彭波
Owner 天津佐源新材料科技有限公司
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