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Method for improving use performance of aluminum dihydrogen tripolyphosphate composite pigment

A technology of aluminum dihydrogen tripolyphosphate and composite pigments, which is applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., and can solve the problems of reducing the anti-corrosion ability of coatings, easy foaming, and high water absorption

Inactive Publication Date: 2018-02-13
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When used as a pigment, it is still slightly acidic, and the water absorption of the coating is high after curing. It is easy to foam after long-term use, which reduces the corrosion resistance of the coating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Mix 100 parts of aluminum oxide and 339 parts of 85% concentrated phosphoric acid evenly together, then add 14 parts of aluminum phosphate and 100 parts of absolute ethanol in turn while stirring, cool naturally, and let stand to separate layers. Remove the upper layer liquid, move the slurry into a heating furnace, and after roasting at 420°C for 10 hours, move it into a water tank and heat it while it is hot. Then add 150 parts of zinc oxide, 50 parts of silicon dioxide and 200 parts of water, and stir well. Dry, pulverize, and sieve through a 800-mesh sieve to collect powder with a particle size below 20 microns. The unmodified aluminum dihydrogen tripolyphosphate composite pigment is obtained. The powder is transferred to a gamma ray radiation field for irradiation treatment at a dose rate of 1 kGy / h and an absorbed dose of 50 kGy to obtain a radiation-modified aluminum dihydrogen tripolyphosphate composite pigment.

[0013] The corrosion resistance of composite p...

Embodiment 2

[0015] Mix 100 parts of aluminum oxide and 423 parts of 85% concentrated phosphoric acid evenly together, then add 18 parts of aluminum phosphate and 100 parts of absolute ethanol in turn while stirring, and cool naturally. Move the slurry into a heating furnace, and after roasting at 350°C for 6 hours, move it into a water tank and heat it while it is hot. Then add 100 parts of magnesium oxide, 50 parts of calcium oxide and 100 parts of water, and stir well. Dry, pulverize, and sieve through a 800-mesh sieve to collect powder with a particle size below 20 microns. The unmodified aluminum dihydrogen tripolyphosphate composite pigment is obtained. The powder is transferred to a gamma ray radiation field for irradiation treatment at a dose rate of 1 kGy / h and an absorbed dose of 100 kGy to obtain a radiation-modified aluminum dihydrogen tripolyphosphate composite pigment.

[0016] The EIS method described in Example 1 was used to test the corrosion resistance of the composite ...

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Abstract

The invention relates to a method for improving the use performance of an aluminum dihydrogen tripolyphosphate composite pigment. The composite pigment is prepared from aluminum dihydrogen tripolyphosphate, metal oxide and / or body pigments. The content of the aluminum dihydrogen tripolyphosphate in the composite pigment is between 1 percent and 99 percent, and is preferably between 40 percent and90 percent. The metal oxides in the composite pigment can be one or several kinds of materials from zinc oxide, calcium oxide, magnesium oxide, barium oxide, nickel oxide, ferric oxide, molybdenum oxide and titanium oxide. The body pigments in the composite pigment can be one or several kinds of materials from silicon dioxide, calcium carbonate, barium sulfate and talcum powder, or are not added.The composite pigment is subjected to radiation treatment by gamma rays; the adsorption dosage is between 10 kGy and 1000 kGy. The average grain diameter of the composite pigment is below 100 micrometers, and is preferably below 30 micrometers. The anti-corrosion performance of the composite pigment subjected to radiation treatment can be obviously improved.

Description

technical field [0001] The invention relates to a modification method for improving the anticorrosion performance of aluminum dihydrogen tripolyphosphate in anticorrosion coatings. Background technique [0002] Aluminum dihydrogen tripolyphosphate is a pigment with good anti-corrosion ability, which can significantly improve the anti-corrosion ability of organic coatings, and is widely used in anti-corrosion organic coatings. The reason why aluminum dihydrogen tripolyphosphate has strong anti-corrosion ability is that tripolyphosphate ions (P 3 o 10 5- ), can form chelates with various metal ions, and form a stable protective film on the metal surface, and has strong anti-corrosion ability to iron. Moreover, orthophosphoric acid is generated during depolymerization, which can also form an anti-corrosion protective film with metals. [0003] However, aluminum dihydrogen tripolyphosphate cannot be directly added to the paint, and must be modified before adding to make a co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D163/00
CPCC09D5/084C08K3/22C08K3/32C08K3/36C08K9/00C08K13/06C08K2003/2206C08K2003/222C08K2003/2227C08K2003/2296C08K2003/327C08K2201/003C09D163/00
Inventor 宋伟强郑红娟吴龙超李金玲荆运杰
Owner HENAN UNIVERSITY OF TECHNOLOGY
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