Preparation process of medium temperature resistant iron oxide black

An iron oxide black, manufacturing process technology, applied in chemical instruments and methods, inorganic pigment processing, fibrous fillers, etc., can solve the problems of discoloration, flammability, poor heat resistance, etc., to ensure the color change under heating and ensure safety good heat resistance and heat resistance

Inactive Publication Date: 2010-09-08
南通宝聚颜料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method that can overcome the disadvantages of poor heat resistance, flammability and discoloration during transportation and storage of ordinary iron black, and provide iron oxide black resistant to medium temperature instead of ordinary iron black, so as to ensure small color change when heated and ensure transportation and storage safety, and the manufacturing process of medium temperature resistant iron oxide black that can be used at 270°C

Method used

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  • Preparation process of medium temperature resistant iron oxide black
  • Preparation process of medium temperature resistant iron oxide black

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Commercially available common iron oxide black filter cake 100kg, its brand name is 703, solid content 70%, raw material and water are put into the beater according to the ratio and the slurry concentration is adjusted to 55%, adjust the beater parameter 1200 rev / min, add Boric acid 280g, start beating, keep warm and put in neutralizing agent NaOH according to the experimental steps to ensure that the pH value is 7-7.5, continue to stir, keep warm for 30 minutes, press filter, dry and powder to obtain product 703U, do temperature resistance test on raw materials and products, use pigment dry powder Heat resistance determination method GB1716-79, with untreated raw materials as the standard:

[0017]

[0018]

[0019] Ordinary iron black begins to change color at 120°C, but the temperature resistance of the product of the present invention changes color DE≤0.5 at 270°C, so its temperature resistance is at 270°C

Embodiment 2

[0021] Commercially available common iron oxide black filter cake 100kg, its brand name 703, solid content 70%, raw material and water are put into beater according to proportioning, slurry concentration is adjusted to 55%, adjusts beater parameter 1200 revs / min, at the same time Add auxiliary agent boric acid, start beating, keep warm and add neutralizer NaOH to ensure that the pH value is 7-7.5, continue to stir, keep warm for 30 minutes, press filter, dry and separate powder to obtain product 703U. The influence of the amount of auxiliary agent on pigment 703 is as follows:

[0022] Auxiliary dosage%

[0023] When the amount of additives exceeds 0.5, the conductivity and water-soluble salts both exceed the standard, so the amount of additives is preferably below 0.5%.

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Abstract

The invention discloses a preparation process of medium temperature resistant iron oxide black; iron oxide black is obtained through an oxidation method, a filter cake which is not dried is directly used, the iron oxide black, the filter cake and the water are added in, a beating machine is controlled to prepare serum with a certain concentration, water-soluble additive is added in during a beating process, neutralizer is added, and the pH value is regulated; and the stirring is continued, iron black is produced through normal steps after heat insulation, dried and beaten into powder, and the medium temperature resistant iron oxide black is obtained. The iron oxide black prepared by the process can stand 260 to 270DEG C, does not discolor or has small color changes; and the iron black has the advantages of good heat resistant performance, and no flammability and no easy discoloring when in transportation and storage, ensures small heating color changes as well as the safety of transportation and storage, and simultaneously can be used at 270DEG C.

Description

technical field [0001] The invention relates to a standard-grade iron oxide black pigment, through the beating process, adding water-soluble additives and neutralizing agent coating to obtain a medium-temperature-resistant iron oxide black pigment with a temperature resistance of 270°C, which is suitable for construction, plastic ceramics, and rubber And other fields that require a temperature resistance of less than 270°C, the color will not change significantly during use. Background technique [0002] The chemical name of iron oxide black is ferric oxide, and its chemical formula is Fe3O4 or Fe2O3·FeO. It has saturated blue ink light black, high hiding power and tinting power, very stable to light and atmosphere, and insoluble in alkali , Slightly soluble in dilute acid, completely soluble in concentrated acid, poor heat resistance, easy to oxidize at higher temperature, forming red iron oxide. Iron oxide black is widely used in construction and plastic industries becaus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/24C09C3/06
Inventor 杨建明邵玉详
Owner 南通宝聚颜料有限公司
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