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A kind of colored silica sand and its preparation method

A technology of silica sand and color, which is applied in the field of colored silica sand and its preparation, can solve the problems of difficult coloring, poor long-term color stability, single color of silica sand, etc., and achieve the effect of ensuring long-term stability and avoiding color loss

Inactive Publication Date: 2011-11-30
BEIJING RECHSAND SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of single color, difficult coloring and poor long-term color stability of silica sand in the prior art, and provide a colored silica sand that is easy to color and has good long-term color stability after coloring and its preparation method

Method used

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Examples

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Effect test

preparation example Construction

[0016] The present invention also provides a method for preparing the above-mentioned colored silica sand, wherein the method comprises:

[0017] The silica sand substrate is uniformly mixed with the resin at 100-200°C, and then the mixture of the silica sand substrate and the resin is contacted with a pigment containing at least one color and a curing agent to form a colored resin layer on the surface of the silica sand substrate.

[0018] In a preferred situation, the silica sand substrate before being mixed with the resin can be heat-treated at 250-1000°C for 1-60min, more preferably at 400-800°C for 15-30min, after the silica sand has been heat-treated at the above temperature, it can Fully removing the impurities on the surface of the silica sand can promote the close combination of the silica sand substrate and the colored resin layer. In a further preferred situation, transfer the heat-treated silica sand substrate to a sand mixer, and naturally cool it to 100-200°C und...

Embodiment 1

[0027] This example is used to illustrate the colored silica sand of the present invention and its preparation method.

[0028] Add 100kg of silica sand to the sand mixer, and at a stirring speed of 100r / min, when cooling to 150°C, add 5kg of epoxy resin (the model is E51, the epoxy value is 0.48-0.54eq / 100g), and continue stirring. A homogeneous mixture of epoxy resin and silica sand was obtained. Then, at a temperature of 100°C, add 0.2kg of CR-826 titanium dioxide to the mixture, stir for 60s, then add 1kg of resole phenolic resin (type 2127), and continue stirring for 300s to obtain colored silica sand. The average thickness of the colored resin layer of the colored silica sand was determined to be 5 μm.

Embodiment 2

[0032] This example is used to illustrate the colored silica sand of the present invention and its preparation method.

[0033] Put 100kg of silica sand into the muffle furnace, roast at 800°C for 20 minutes, then directly transfer the roasted silica sand to the sand mixer, at a stirring speed of 100r / min, when cooling to 150°C, add 5kg of epoxy Resin (model is E51, epoxy value is 0.48-0.54eq / 100g), continues to stir, obtains the homogeneous mixture of epoxy resin and silica sand. Then, at a temperature of 100°C, add 0.2kg of CR-826 titanium dioxide to the mixture, stir for 60s, then add 1kg of resole phenolic resin (type 2127), and continue stirring for 300s to obtain colored silica sand. The average thickness of the colored resin layer of the colored silica sand was determined to be 5 μm.

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PUM

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Abstract

The invention provides a colored silica sand and a preparation method of the colored silica sand, wherein the colored silica sand comprises a silica sand substrate and a colored resin layer coated on the surface of the silica sand substrate, and the colored resin layer contains pigments, resins and cured agent. The preparation method of the colored silica sand comprises: uniformly mixing the silica sand substrate with the resin at 100-200°C, then contacting the mixture of the silica sand substrate and the resin with a pigment and a curing agent containing at least one color, and forming the silica sand substrate on the surface of the silica sand substrate A colored resin layer is formed. The colored silica sand and the preparation method thereof of the present invention overcome the problems of single color, difficulty in coloring and poor long-term color stability of the silica sand in the prior art, can easily color the silica sand, and have good long-term color stability of the colored silica sand.

Description

technical field [0001] The invention relates to a colored silica sand and a preparation method thereof. Background technique [0002] Silica sand, also known as quartz sand, is a hard, wear-resistant, and chemically stable silicate mineral with a particle size of 0.020mm-3.350mm. Its main mineral component is silicon dioxide. The color of silica sand is milky white or colorless. Translucent, with a hardness of 7 and a relative density of 2.65, the chemical, thermal and mechanical properties of silica sand have obvious anisotropy. Due to the unique physical and chemical properties of silica sand, it is widely used in many fields such as glass, casting, ceramics, metallurgy, construction, and chemical industry. [0003] Natural silica sand is rich in resources and low in price. In the field of building materials, it is often used as the main raw material for some sand-based permeable bricks, permeable pavement and other water-permeable materials. Demand for modern colorful b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B14/06
Inventor 秦升益胡文星王振邦添亮
Owner BEIJING RECHSAND SCI & TECH GRP
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