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A kind of silica sand colorant, colored silica sand and preparation method of colored silica sand

A colorant and silica sand technology, applied in the field of preparation of colored silica sand, can solve the problems of poor long-term color stability, difficulty in coloring silica sand, etc.

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 difficulty in coloring silica sand and poor long-term color stability of colored silica sand in the prior art, and provide a silica sand colorant that is easy to color and has good long-term color stability after coloring, colored silica sand and a preparation method for colored silica sand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The present invention also provides a method for preparing colored silica sand, wherein the method comprises:

[0021] Mix the silica sand with the resin evenly at 100-200°C, and then make the mixture of the silica sand and the resin contact with the silica sand colorant and curing agent of the present invention to form a colored resin layer on the surface of the silica sand.

[0022] In a preferred situation, the silica sand 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 is heat-treated at the above temperature, the silica sand can be The impurities on the surface are fully removed, which can promote the close combination of silica sand and colored resin layer. In a further preferred situation, transfer the heat-treated silica sand to a sand mixer, and naturally cool it to 100-200°C under stirring at a stirring speed of 50-200r / min, add resin, and continue stirring until ...

Embodiment 1

[0031] This example is used to illustrate the silica sand colorant, colored silica sand and the preparation method of colored silica sand of the present invention.

[0032] Preparation of silica sand colorant:

[0033] 14g of iron yellow powder (320 mesh sieve residue≤0.5% by weight) purchased from Shanghai Xinyan Pigment Co., Ltd. and 86g of titanium dioxide (325 mesh sieve residue≤0.05% by weight) purchased from Langfang Xiangyu Titanium Dioxide Manufacturing Co., Ltd. Mix well to obtain 100 g of the silica sand colorant (C1) of the present invention.

[0034] Preparation of colored silica sand:

[0035] (1) Silica sand surface pretreatment step: Add 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, and cool it at a stirring speed of 100r / min. When the temperature reaches 150°C, add 5kg of epoxy resin binder (E51, epoxy value 0.48-0.54eq / 100g), and continue stirring.

[0036] (2) ...

Embodiment 2

[0038] This example is used to illustrate the silica sand colorant, colored silica sand and the preparation method of colored silica sand of the present invention.

[0039] Preparation of silica sand colorant:

[0040] The silica sand colorant (C2) was prepared according to the method of Example 1, except that the composition of the silica sand colorant was shown in Table 1.

[0041] Preparation of colored silica sand:

[0042] (1) Silica sand surface pretreatment step: Add 100kg of silica sand into the muffle furnace, roast at 1000°C for 1min, then directly transfer the roasted silica sand to the sand mixer, and cool it at a stirring speed of 200r / min When the temperature reaches 200°C, add 10kg of epoxy resin adhesive (model is E51, epoxy value is 0.48-0.54eq / 100g), and continue stirring.

[0043] (2) Silica sand coloring step: at a temperature of 200°C, add 0.01kg of silica sand colorant C2 to the silica sand in step (1), after stirring for 10s, add 5kg of resole phenolic...

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Abstract

The invention provides a silica sand colorant, which contains iron yellow powder and titanium dioxide, wherein, based on the total weight of iron yellow powder and titanium dioxide, the content of iron yellow powder is 1-99% by weight, and the content of titanium dioxide is The colored silica sand using the silica sand coloring agent and the preparation method of the colored silica sand are also provided. The present invention uses the silica sand coloring agent prepared by mixing iron yellow powder and titanium dioxide in a certain proportion to overcome the problems of difficulty in coloring silica sand and poor long-term stability of the color after coloring in the prior art, and can easily dye silica sand to different degrees of yellow , and the colored silica sand has excellent long-term color stability.

Description

technical field [0001] The invention relates to a silica sand coloring agent, colored silica sand obtained by using the silica sand coloring agent and a preparation method of the colored silica sand. 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, such as aeolian sand, river sand and sea sand, etc., and its price is low. The color of natural silica sand is single, wh...

Claims

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Application Information

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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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