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Preparation method of high-temperature-resistant ferric oxide yellow pigment

A technology of iron oxide yellow and high temperature resistance, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of reducing the dispersibility of iron oxide yellow and affecting performance, and achieve excellent dispersibility, high resistance Discoloration, good application prospects

Active Publication Date: 2016-04-20
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above technical scheme improves the temperature resistance of iron oxide yellow pigments, but greatly reduces the dispersibility of iron oxide yellow in substrates such as plastics and paints, and affects other pigment properties of iron oxide yellow

Method used

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  • Preparation method of high-temperature-resistant ferric oxide yellow pigment
  • Preparation method of high-temperature-resistant ferric oxide yellow pigment
  • Preparation method of high-temperature-resistant ferric oxide yellow pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Use deionized water to prepare 1000g of the primary product of iron oxide yellow into a slurry containing a concentration of 260g / L of the primary product of iron oxide yellow, add 0.03L of an aqueous sodium silicate solution with a mass concentration of sodium silicate of 100g / L, and then pass the slurry into the sand Sand grinding in the mill, and the sand-milled slurry is filtered through a sieve to remove coarse particles to obtain a water suspension of the primary product of iron oxide yellow.

[0038]Add the aqueous suspension of the primary product of iron oxide yellow into the coating tank while stirring and raising the temperature to 75°C, and keep this temperature until the coating of aluminum hydroxide is completed. Start to pack dense silicon dioxide, add dropwise sodium silicate aqueous solution with a concentration of 50g / L at a concentration of 2.0% relative to the initial iron oxide yellow product, and simultaneously add 1mol / L hydrochloric acid in parall...

Embodiment 2

[0043] Use deionized water to prepare 1000g of the primary iron oxide yellow product into a slurry containing a concentration of 70g / L of the primary iron oxide yellow product, add 0.4L of sodium silicate aqueous solution with a mass concentration of sodium hexametaphosphate of 35g / L, and then pass the slurry into the sand Sand grinding in the mill, and the sand-milled slurry is filtered through a sieve to remove coarse particles to obtain a water suspension of the primary product of iron oxide yellow.

[0044] Add the aqueous suspension of the primary product of iron oxide yellow into the coating tank while stirring and raising the temperature to 50°C, and keep this temperature until the coating of aluminum hydroxide is completed. Start to pack dense silicon dioxide, dropwise add 1.5% sodium silicate aqueous solution with a sodium silicate concentration of 150g / L relative to the initial iron oxide yellow product, and simultaneously add 4mol / L hydrochloric acid to maintain pH =...

Embodiment 3

[0049] Use distilled water to prepare 1000g of iron oxide yellow primary product into a slurry containing 200g / L of iron oxide yellow primary product, add 0.05L of sodium hexametaphosphate aqueous solution with a mass concentration of sodium hexametaphosphate of 70g / L, and then pass the slurry into the sand Sand grinding in the mill, and the sand-milled slurry is filtered through a sieve to remove coarse particles to obtain a water suspension of the primary product of iron oxide yellow.

[0050] Add the aqueous suspension of the primary product of iron oxide yellow into the coating tank while stirring and raising the temperature to 40°C. Start to pack dense silicon dioxide, add dropwise an aqueous solution of sodium silicate with a concentration of 100g / L relative to the amount of 1.0% added to the primary product of iron oxide yellow, and add the aqueous solution of sodium silicate continuously and at a constant speed for 3 hours. After the addition, stir and mature for 20 min...

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Abstract

The invention relates to a preparation method of a high-temperature-resistance ferric oxide yellow pigment. The method comprises the following steps: dissolving a ferric oxide yellow initial product into water to prepare slurry of which the mass percent is 5-40 percent, and preparing a water suspension; adding a sodium silicate aqueous solution into the water suspension, and reacting at the temperature of 30-90 DEG C and the pH value of 7-10 to coat silicon dioxide; adding a phosphorus compound aqueous solution and an aluminum salt aqueous solution at the temperature of 30-90 DEGC and the pH value of 5-9, and reacting to coat an aluminum phosphate compound; continually adding an aluminum salt aqueous solution, keeping the pH value at 4-10, and reacting at the temperature of 30-90 DEGC to coat aluminum hydroxide; filtering the obtained ferric oxide yellow, washing, drying and performing airflow smashing and organic treatment to obtain the high-temperature-resistance ferric oxide yellow pigment. The preparation method has the advantages of high controllability, high operability and easiness in industrial production, and the prepared ferric oxide yellow pigment has the advantages of high temperature resistance, high color-changing resistance, superior dispersion performance and the like.

Description

technical field [0001] The invention relates to the field of preparation of iron oxide yellow pigments, in particular to a preparation method of high temperature-resistant iron oxide yellow pigments. Background technique [0002] Iron oxide yellow pigment is a kind of iron pigment, because of its excellent light resistance, resistance to atmospheric influence, resistance to dirty gas and alkali resistance, it is widely used in construction, paint, rubber, plastic and other industries. Iron oxide yellow pigment is used as a pigment or colorant in various concrete prefabricated parts and building product materials, and is directly mixed into cement for application. Iron oxide yellow pigments are suitable for various paint coloring and protective substances, including water-based interior and exterior wall paints, powder coatings, etc.; also suitable for oily paints, including various primers and topcoats such as oxygen, alkyd, amino, etc.; can also be used for Toy paint, deco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/24C09C3/06C09C3/08
CPCC01P2004/01C01P2006/37C09C1/24C09C3/063C09C3/08
Inventor 储成义孙爱华顾水荣许高杰吴建民李勇胡云芳张建飞陆玉平曹兵斌
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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