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Intermediate temperature-resistant coated iron oxide black and preparation method thereof

A kind of iron oxide black, coating technology, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problem of poor high temperature resistance of iron oxide black, achieve short treatment process, excellent dispersion performance , high-strength effect

Active Publication Date: 2012-07-25
SHENGHUA GROUP DEQING HUAYUAN PIGMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical defect of the existing iron oxide black with poor high temperature resistance, the applicant applied for a high temperature resistant iron oxide black pigment and its preparation method (200810063587.5 application Date: 2008-06-20), the high-temperature resistant iron oxide black pigment of this patent includes ferromanganese black. The molar ratio of iron element and manganese element in it is 1.5:1~5:1, and the heat resistance effect of the produced high temperature resistant iron oxide black pigment can reach 700°C or above

Method used

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  • Intermediate temperature-resistant coated iron oxide black and preparation method thereof
  • Intermediate temperature-resistant coated iron oxide black and preparation method thereof
  • Intermediate temperature-resistant coated iron oxide black and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] like figure 1 As shown, take 1 ton of iron oxide black filter cake, with a solid content of 60% and beat the temperature to 85-95 degrees. Add the auxiliary agent aluminum sulfate to 18% of the converted dry powder amount. Minutes, use 20-40% liquid caustic soda to adjust the pH to 9.5 and let it stir for 90 minutes. Calculate the amount of sodium silicate added, which is 25% of the dry powder amount. The actual amount added is 150 kg, and the beating reaction is continued for 30 minutes. Minutes, adjust the pH to be neutral with 10-20% dilute sulfuric acid, let it stir and react for 90 minutes. Rinse, tumble dry. The comparison of the test results between the medium temperature resistant iron oxide black produced by this process and ordinary iron oxide black is as follows:

[0036]

Embodiment 2

[0038] like figure 1 As shown, take 1 ton of iron oxide black filter cake, with a solid content of 60% and beat the temperature to 85-95 degrees. Minutes, use 20-40% liquid alkali to adjust the pH to 9.5 and let it stir for 90 minutes. Calculate the amount of sodium silicate added, which is 20% of the dry powder amount. The actual amount added is 120 kg, and the beating reaction is continued for 30 minutes. Minutes, adjust the pH to be neutral with 10-20% dilute sulfuric acid, let it stir and react for 90 minutes. Rinse, tumble dry. The comparison of the test results between the medium temperature resistant iron oxide black produced by this process and ordinary iron oxide black is as follows:

[0039]

[0040] From the above comparison results, the temperature resistance of the coated iron oxide black pigment changes at about 200 degrees, and the ΔE is below 1.0, while the temperature resistance of the uncoated iron oxide black pigment has changed at about 200 degrees. ...

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Abstract

The invention relates to a temperature resistant iron oxide black and a preparation method thereof, in particular to an intermediate temperature-resistant coated iron oxide black which comprises iron oxide black as a main component, wherein iron oxide black is coated with multiple additive coating layers and iron oxide black and the multiple additive coating layers are combined to form a pigment with films. The multiple coating layers are formed in the way that pH value of compounds containing aluminum ions and silicon ions is regulated so that aluminum ions and silicon ions precipitate in sequence and gradually coat the surface of iron oxide black molecules to form multiple protective films. The iron oxide black prepared by the method disclosed by the invention has good high temperature resistance; and the coated pigment contains uniform ions and has high strength and excellent dispersibility. The invention also discloses a preparation method of the intermediate temperature-resistant coated iron oxide black.

Description

technical field [0001] The invention relates to a temperature-resistant iron oxide black and a preparation method thereof. Background technique [0002] Iron oxide black is referred to as iron black molecular formula, Fe 2 o 3 .FeO, the chemical name is ferric oxide, belongs to the spinel type, it has saturated blue ink light black, and the relative density is 4.73. It has high hiding power and tinting power, and is very stable to light and atmosphere. Because the temperature resistance of ordinary iron oxide black is poor, the heating temperature is about 100 degrees, and it will change color and fade when used in some places with high temperature. [0003] Common iron oxide black production methods such as Chinese invention patent application (application number: 200510075112.4 application date: 2005-06-08) disclose a production method of iron oxide black, including the following content: (1) Preparation of ferrous salt (2), use caustic soda as neutralizer to react wit...

Claims

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Application Information

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IPC IPC(8): C09C1/24C09C3/06
Inventor 竺增林冯阿荣李金花王华英倪雅娟
Owner SHENGHUA GROUP DEQING HUAYUAN PIGMENT