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High temperature resistant iron oxide yellow pigment and preparation method thereof

An iron oxide yellow, high temperature resistant technology, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc. The effect of improving heat resistance

Active Publication Date: 2019-12-03
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current iron oxide yellow coating technology usually adopts single-layer coating, which leads to poor heat resistance and the coating material is easy to nucleate itself; at the same time, this type of coating is usually carried out under high temperature and high pressure, which increases the cost in actual production

Method used

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  • High temperature resistant iron oxide yellow pigment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 coating type iron yellow sample A

[0025] Weigh 10g of yellow iron oxide and disperse it in 300mL of water, sonicate for 10min, and then stir for 1h in a water bath at 80°C to form a homogeneous mixture with a content of yellow iron of 3.3%. Dissolve 0.4g of sodium hydroxide in 100mL of water and pour it into the iron yellow mixture. Then dissolve 0.71g of aluminum sulfate in 150mL of water and slowly drop it into the iron yellow mixed solution. After the solution is dripped, use 0.1wt% aluminum sulfate solution or 0.01wt% sodium hydroxide solution to fix the pH of the iron yellow mixed solution to 9, and then continue Stir and age for 3 hours; dissolve 0.16g of zinc chloride in 150mL of water and slowly drop into the above iron yellow mixture, then slowly add 0.01wt% sodium hydroxide solution into the iron yellow mixture until the pH of the iron yellow mixture reaches 7 , after the solution was dripped, continue to stir and age for 2h. Then, after sucti...

Embodiment 2

[0026] Embodiment 2 coating type iron yellow sample B

[0027] Weigh 50g of yellow iron oxide and disperse it in 500mL of water, sonicate for 10min, then stir in a water bath at 80°C for 1h to form a homogeneous mixture with a content of yellow iron of 10%. Dissolve 4g of sodium hydroxide in 100mL of water and pour it into the iron yellow mixture. Then 7.125g of aluminum sulfate is dissolved in 150mL of water and slowly dripped into the iron yellow mixed solution. After the solution is dripped, titrate the iron yellow mixed solution with 0.1wt% aluminum sulfate solution or 0.01wt% sodium hydroxide solution to make the pH equal to 9, and then Continue to stir and age for 3 hours; dissolve 5.6g of zinc chloride in 150mL of water and slowly drop into the above-mentioned iron yellow mixed solution, then slowly add 0.01wt% sodium hydroxide solution into the iron yellow mixed solution until the pH of the iron yellow mixed solution reaches 7. Continue stirring and aging for 2 hours ...

Embodiment 3

[0028] Embodiment 3 coated iron yellow sample C

[0029] Weigh 10 g of iron oxide yellow and uniformly disperse in 500 mL of water under stirring to form a mixed solution with a content of iron yellow of 2%. Take 100mL of 0.5g sodium hydroxide and dissolve it in water and pour it into the above-mentioned iron yellow mixed solution. Then 1.0g of aluminum nitrate is dissolved in 150mL of water and slowly dripped into the iron yellow mixed solution. After the solution is dripped, titrate the iron yellow mixed solution with 0.1wt% aluminum nitrate solution or 0.01wt% sodium hydroxide solution to make the pH equal to 9, and then Continue to stir and age for 3 hours; dissolve 0.91g of zinc chloride in 150mL of water and slowly drop into the above-mentioned iron yellow mixed solution, and then slowly drop into the iron yellow mixed solution with 0.01wt% sodium hydroxide solution until the pH of the iron yellow mixed solution reaches 7. Continue stirring and aging for 2 hours after t...

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Abstract

The invention provides a high temperature resistant iron oxide yellow pigment and a preparation method thereof. The high temperature resistant iron oxide yellow pigment is a double-layered core-shellstructure, wherein the core structure is an iron oxide yellow pigment, the core structure is coated with a hydroxyl alumina layer and a zinc hydroxide layer from inside to outside in order, a coatingamount of the hydroxyl alumina layer is 1-50% of a weight of the iron oxide yellow pigment, and a coating amount of the zinc hydroxide layer is 1-10% of a weight of the iron oxide yellow pigment. By coating the surface of iron oxide yellow nanoparticles with hydroxyl alumina / zinc hydroxide, heat can be inhibited from entering the inside of the iron yellow particles, so that heat resistance of theiron yellow is greatly improved, heat resistance of the iron oxide yellow is that the iron oxide yellow can withstand for at least 30 minutes in an oven above 240 DEG C, and it can be expected that the product is suitable for high temperature coil coating materials and plastic processing industries.

Description

[0001] (1) Technical field [0002] The invention relates to an iron oxide yellow pigment with high temperature resistance and a preparation method thereof. The invention uses aluminum oxyhydroxide / zinc hydroxide to coat iron oxide yellow to form coated iron oxide yellow with good heat resistance, which can be used as high Molecular material colorants. [0003] (2) Background technology [0004] Iron oxide pigments are traditional colored inorganic pigments, the second largest inorganic pigments in the world after titanium oxide, and the largest colored inorganic pigments. As a traditional inorganic pigment, iron oxide pigments are used in powder coatings with the characteristics of non-toxicity, no pollution, good weather resistance and good temperature resistance. There are many kinds of iron oxide pigments, which can be divided into iron oxide red, iron oxide yellow, iron oxide black and iron oxide brown according to the color. [0005] Iron oxide yellow, also known as iro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/24C09C3/06C09D7/62C08K9/10C08K3/22
CPCC08K3/22C08K9/10C08K2003/2272C09C1/24C09C3/063C09D7/62
Inventor 夏盛杰周凯潘国祥
Owner ZHEJIANG UNIV OF TECH
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