Coated temperature resistant iron oxide yellow

An iron oxide yellow, coating technology, applied in chemical instruments and methods, fibrous fillers, coatings, etc., can solve the problems of uneven coating, affecting temperature resistance, etc., and achieve uniform coating and coating cycle. Short, not easy to agglomerate effect

Inactive Publication Date: 2018-09-04
ZHEJIANG HUAYUAN PIGMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of uneven coating of iron oxide yellow pigment, the present invention affects the heat resistance performance, the first object of the present invention is a kind of coated heat-resistant iron oxide yellow, adding glycerin in the preparation method of the iron oxide yellow, which can After dissolving in water, it adheres to the surface of the dispersed iron oxide yellow, making it difficult to agglomerate and making the coating of aluminum more uniform. In addition, the high temperature and high pressure reaction conditions can promote the improvement of coating efficiency, and its coating cycle is only ordinary oxidation. 1 / 10-1 / 5 of the coating cycle of iron oxide yellow, and further, the present invention coats iron oxide yellow with a layer of dense aluminum oxide and zinc oxide layers to improve the heat resistance of iron oxide yellow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Take 750g of iron oxide yellow dry powder and add it to 14250g of water to make 15000g of iron oxide yellow slurry (volume is about 15L). 2. Place the prepared iron oxide yellow slurry in a high-speed dispersing and stirring machine for dispersing and stirring. The rotating speed is controlled at 500 R / min, and the dispersing time is 30-40 minutes.

[0018] 3. Al with a content of 98.5% mass fraction 2 (SO 4 ) 3 16H 2 O solid 404g was added into 1500g water and fully dissolved to prepare an aluminum sulfate solution with a mass fraction of 21.2%.

[0019] 4. Take reagent grade glycerol and zinc carbonate, the amount of glycerol is 20ml, and the amount of zinc carbonate is 30g.

[0020] 5. Put 15000g of iron yellow slurry prepared in step 1 in the reaction kettle, start stirring, control the stirring speed at 150R / min, slowly add 1904g of aluminum sulfate solution prepared in step 3, and control the adding time at about 180S , then add glycerol and zinc carbonate...

Embodiment 2

[0024] 1. Take 750g of iron oxide yellow dry powder and add it to 14250g of water to make 15000g of iron oxide yellow slurry (volume is about 15L). 2. Place the prepared iron oxide yellow slurry in a high-speed dispersing and stirring machine for dispersing and stirring. The rotating speed is controlled at 500 R / min, and the dispersing time is 30-40 minutes.

[0025] 3. Al with a content of 98.5% mass fraction 2 (SO 4 ) 3 16H 2 O solid 350g joins 1500g water and fully dissolves, is mixed with the aluminum sulfate solution that mass fraction is 21.2%.

[0026] 4. Take reagent grade glycerol and zinc carbonate, the amount of glycerol is 15ml, and the amount of zinc carbonate is 25g.

[0027] 5. Put 15000g of iron yellow slurry prepared in step 1 into the reaction kettle, start stirring, control the stirring speed at 150R / min, slowly add 1850g of aluminum sulfate solution prepared in step 3, and control the adding time at about 180S , then add glycerol and zinc carbonate pre...

Embodiment 3

[0031] 1. Take 750g of iron oxide yellow dry powder and add it to 14250g of water to make 15000g of iron oxide yellow slurry (volume is about 15L). 2. Place the prepared iron oxide yellow slurry in a high-speed dispersing and stirring machine for dispersing and stirring. The rotating speed is controlled at 500 R / min, and the dispersing time is 30-40 minutes.

[0032] 3. Al with a content of 98.5% mass fraction 2 (SO 4 ) 3 16H 2 440g of O solid was added into 1500g of water and fully dissolved to prepare an aluminum sulfate solution with a mass fraction of 21.2%.

[0033] 4. Take reagent grade glycerol and zinc carbonate, the amount of glycerol is 26ml, and the amount of zinc carbonate is 37g.

[0034] 5. Put 15000g of iron yellow slurry prepared in step 1 into the reaction kettle, start stirring, control the stirring speed at 150R / min, slowly add 1940g of aluminum sulfate solution prepared in step 3, and control the adding time at about 180S , then add glycerol and zinc c...

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PUM

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Abstract

The invention relates to iron oxide yellow pigment, in particular to a coated temperature resistant iron oxide yellow. The iron oxide yellow comprises an iron oxide yellow core and alumina and zinc oxide that are coated on the iron oxide yellow core. The preparation method comprises the steps of: 1) putting prepared iron oxide yellow slurry in a reaction kettle, slowly adding an aluminum sulfate solution under stirring, then adding glycerol and zinc carbonate into the feed solution in the reaction kettle, adjusting the pH value of the feed solution in the reaction kettle to 11-12, and when thepH value becomes stable, closing the cover of the reaction kettle; 2) raising the temperature to 220DEG C-250DEG C, and when the temperature in the reaction kettle reaches 220-250DEG C, making the reaction kettle enter a heat preservation and pressure maintaining state; and 3) after heat preservation for 1-3h and cooling to a temperature below 60DEG C, opening the kettle cover, adjusting the pH to 7.5-8.5, after the pH is stabilized, conducting rinsing and pumping filtering, performing drying at 100-120DEG C, and finally carrying out crushing. The coated iron oxide yellow synthesized by the invention has the advantages of good heat resistance, more uniform coating, simple synthesis method, low cost, safety, environmental protection, etc.

Description

technical field [0001] The invention relates to an iron oxide yellow pigment, in particular to a coated heat-resistant iron oxide yellow. Background technique [0002] Iron oxide yellow, also known as iron oxyhydroxide, its molecular formula is FeOOH or Fe 2 o 3 ·H 2 O, in the form of yellow powder, its particle shape is needle-like, has high coloring power, hiding power, and is non-toxic and harmless. It is an environment-friendly inorganic pigment, and its light resistance reaches 6-7 grades. Iron oxide yellow pigments are widely used in building materials, coatings, paints, plastics, rubber, electronics, industrial catalysts, tobacco, cosmetics and other industries. [0003] The surface of ordinary iron oxide yellow is not coated, and the crystal water contained in it is easily lost at high temperature, thus turning into iron oxide red. At present, the coating technology of iron oxide yellow pigment is mainly the technology of coating at normal temperature. Since the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/24C09C3/06C08K9/10C08K3/22C09D7/62C09D5/03
CPCC01P2006/37C08K3/22C08K9/10C08K2003/2227C08K2003/2272C08K2003/2296C09C1/24C09C3/063C09D5/038C09D7/62
Inventor 李金花沈辉
Owner ZHEJIANG HUAYUAN PIGMENT CO LTD
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