Nanometer oxide-organic acid coated aluminum polyphosphate powder and preparation method thereof

Abstract

The invention relates to a nanometer oxide-organic acid coated aluminum polyphosphate powder. The powder uses aluminum polyphosphate as a core, nanometer oxide as a middle layer and the organic acid with a nanoscale thickness as a shell, wherein the mass of the nanometer oxide accounts for 0.1 to 10% of the mass of the aluminum polyphosphate; and the mass of the organic acid accounts for 0.01 to 0.2% of the mass of the aluminum polyphosphate. The preparation method for the powder comprises the following steps: crushing the aluminum polyphosphate, carrying out sieving, collecting the aluminum polyphosphate with a particle size of 0.2 to 20 [mu]m, adding a dispersant into a coating reaction device, carrying out mixing and dispersing treatment, subjecting an obtained mixture as a base carrier to coating reaction with the nanometer oxide with a particle size of 20 to 200 nm, then carrying out a coating reaction with the organic acid, and controlling the thickness of coating to be 10 to 100 nm. The nanometer oxide-organic acid coated aluminum polyphosphate powder provided by the invention is improved in performances like heat resistance and dispersity through modification of aluminum polyphosphate, can be applied to materials like printing ink, plastics, rubber and paper, and improves performances like corrosion resistance, thermal stability, aging resistance, weather resistance and service life of corresponding materials.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a nano oxide-organic acid-coated aluminum polyphosphate powder and a preparation method thereof. Background technique [0002] At present, there are more than 50 kinds of known aluminum phosphates, among which polyaluminum phosphates include aluminum dipolyphosphate, aluminum tripolyphosphate, aluminum polyphosphate, aluminum metaphosphate, aluminum pyrophosphate, etc. Among them, tripolyphosphate is more researched. Aluminum phosphate, as an emerging functional material, is mainly researched in the fields of coating antirust and glass manufacturing at home and abroad. Professor Masahiro Kobayashi of Kobe University in Japan and his colleagues first synthesized aluminum tripolyphosphate in 1970, and Imperial Chemical Corporation of Japan formed an industrialized device in 1981 and applied aluminum tripolyphosphate to the field of antirust coatings. At the end of the last century...

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Problems solved by technology

[0004] In the prior art, there is no relevant report on the application of aluminum polyphosphate to ink, plastics, rubber and paper, etc. and good results. We have found that the direct application of aluminum polyphosphate to materials such as ink, plastics, rubber and paper will improve Corresponding materials have anti-corrosion, thermal stability, weather resistance, service life and other properties, but the practical results show that direct application of aluminum polyphosphate to the above material systems has poor stability, difficulty in dispersion, poor performance, etc.

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