Method for producing rust-proof uvioresistant black iron oxide

A technology of iron oxide black and production method, which is applied in the field of chemical pigments, can solve the problems of limiting the use range of iron oxide black, poor UV resistance, discoloration, etc., and achieve the effect of improving UV resistance and not easy to separate and fall off

Inactive Publication Date: 2014-12-17
ANHUI TOPTECHSCR ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

However, the existing iron oxide black is prone to fading and discoloration, has poor UV resistance and poor antirust ability, thus limiting the scope of use of iron oxide black

Method used

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Embodiment Construction

[0008] A kind of production method of anti-rust anti-ultraviolet iron oxide black, the iron oxide black that adopts the sodium hydroxide oxidation method to make, directly use the undried iron oxide black filter cake, add three Aluminum polyphosphate, 0.25% UV absorber UV-327, 0.4% bis(dioctyloxypyrophosphate) ethylene titanic acid and 0.6% deionized water, 2500rpm high-speed grinding for 20 minutes, take out and dry Add an appropriate amount of water and beat for 30 minutes to make a slurry with a concentration of 60%, and add 0.2% nano-silica, 0.3% ammonium citrate, and 0.2% catechol by weight of the slurry, stir for 20 minutes, and then pass the colloid Grinding until the particle size is less than 50 μm, drying and pulverizing the slurry is the finished product.

[0009] In the present invention, aluminum tripolyphosphate, ultraviolet absorber UV-327, bis(dioctyloxypyrophosphate) ethylene titanic acid and deionized water are added for grinding treatment, and aluminum tripo...

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Abstract

The invention discloses a method for producing rust-proof uvioresistant black iron oxide. The method comprises the following steps of preparing the black iron oxide through a sodium hydroxide oxidation method, adding aluminium triphosphate of about 3-6% of the weight of a black iron oxide filter cake, 0.2-0.3% of ultraviolet light absorber UV-327, 0.4-0.5% of di-(dioctyl oxygen pyrophosphate) ethylene metatitanic acid and 0.5-1% of deionized water, grinding at a high speed for 10-20 minutes by 2500-3000rpm, after taking out and drying, adding moderate water for pulping for 20-30 minutes, and preparing serous fluid with concentration of 55-65%. According to the method, the aluminium triphosphate, the ultraviolet light absorber UV-327, the di-(dioctyl oxygen pyrophosphate) ethylene metatitanic acid and the deionized water are firstly added for grinding, the aluminium triphosphate and the ultraviolet light absorber are bridged through the titanate so as to be coated on the surface of the black iron oxide, thus being not easy to be separated and fall off and forming a layer of rust-roof film on the surface of the black iron oxide, therefore, the black iron oxide has a rust-proof function and improves the anti-ultraviolet performance.

Description

technical field [0001] The invention relates to a production method of anti-rust and anti-ultraviolet iron oxide black, which belongs to the field of chemical pigments. Background technique [0002] Iron-based pigments are important inorganic color pigments, and their annual output ranks first in inorganic color pigments. Due to the strengthening of the world's environmental protection awareness, inorganic iron-based pigments have continuously replaced organic pigments, red lead, lead chrome yellow and other lead-based and chromium-based toxic inorganic pigments due to their non-toxic, odorless, and non-polluting characteristics. Iron oxide black is widely used in paints and coatings in the construction industry due to its simple chemical composition, non-toxic and pollution-free, and strong chemical stability. However, the existing black iron oxide is prone to fading and discoloration, has poor ultraviolet resistance and poor antirust ability, thus limiting the scope of us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12C09C1/24C09C3/08C09C3/06
Inventor 卢叶恒
Owner ANHUI TOPTECHSCR ENVIRONMENTAL SCI & TECH
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