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High-temperature binding agent of aluminum phosphosilicate and preparation method of high-temperature binding agent

A high-temperature binder, aluminum phosphosilicate technology, applied in the direction of polymer binder additives, non-polymer binder additives, adhesives, etc. Low temperature and high curing conditions, to achieve the effects of good thermal shock stability, small high temperature creep value and uniform expansion

Active Publication Date: 2021-09-07
GUANGXI SANJING CHEM SCI & TECH +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic high-temperature binders are divided into two categories: phosphate-based and silicate-based. During the curing process of silicate-based high-temperature binders, an inorganic high-polymer network structure dominated by silicon / oxygen bonds is formed, which can improve The strength of the material, but there are problems such as low bonding strength, high curing conditions and brittleness. Compared with the silicate high-temperature binder, the phosphate system has better high temperature resistance and oxidation resistance, but the phosphate bond It is difficult to achieve low-temperature curing and is brittle

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  • High-temperature binding agent of aluminum phosphosilicate and preparation method of high-temperature binding agent
  • High-temperature binding agent of aluminum phosphosilicate and preparation method of high-temperature binding agent
  • High-temperature binding agent of aluminum phosphosilicate and preparation method of high-temperature binding agent

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preparation example Construction

[0026] The preparation method of the aluminum dihydrogen phosphate is as follows: adjust the aluminum hydroxide powder into a slurry, then add phosphoric acid, and react until transparent at 20-120°C and 20-500r / min, to obtain the phosphoric acid dihydrogen phosphate. Aluminum hydrogen phosphate; specifically, aluminum dihydrogen phosphate refers to an aqueous solution of aluminum dihydrogen phosphate. When preparing aluminum dihydrogen phosphate, the amount of aluminum hydroxide added in each part of phosphoric acid is 0.22 parts, and the amount of water added is 2.5 parts.

[0027] In the following examples, the impact strength was tested according to the provisions of GB / T1732-93; the flexibility was tested according to the provisions of GB / T1731-1993, and the bond strength was tested according to the provisions of GB / T31541-2019.

Embodiment 1

[0029] A high-temperature binder for aluminum phosphosilicate, which consists of the following components in parts by weight: 44 parts of aluminum dihydrogen phosphate, 7 parts of zinc silicate, 36 parts of manganese oxide, 11 parts of phosphoric acid, 0.05 part of natural silica, 0.05 part of polyvinyl alcohol, 0.06 part of kaolin, 0.001 part of thickener;

[0030] A preparation method of a high-temperature binder of aluminum phosphosilicate, comprising the following steps:

[0031] (1) Weighing and mixing the raw materials for the high-temperature binder of aluminum phosphosilicate according to the formula to obtain the mixed raw materials;

[0032] (2) Disperse the mixed raw material at high speed for 0.5h under the condition of 300r / min, and then disperse the mixed raw material at high speed for 0.5h under the condition of 500r / min to obtain the high-temperature binder of aluminum phosphosilicate.

[0033] The application of the high-temperature binder of aluminum phospho...

Embodiment 2

[0037] A high-temperature binder for aluminum phosphosilicate, the high-temperature binder for aluminum phosphosilicate is composed of the following components by weight: 45 parts of aluminum dihydrogen phosphate, 5 parts of lithium silicate, metal and / or metal 40 parts of oxides, 10 parts of phosphoric acid, 0.1 parts of fumed silica, 0.01 parts of polyvinyl alcohol, 0.05 parts of bentonite, 0.004 parts of additives;

[0038] The metal and / or metal oxide includes 35 parts by weight of alumina, 5 parts by weight of zirconia, a total of 40 parts by weight;

[0039] The auxiliary agent includes 0.001 parts by weight of dispersant, 0.001 parts by weight of defoamer, 0.002 parts by weight of silane coupling agent, a total of 0.004 parts by weight;

[0040] A preparation method of a high-temperature binder of aluminum phosphosilicate, comprising the following steps:

[0041](1) Weighing and mixing the raw materials for the high-temperature binder of aluminum phosphosilicate accord...

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Abstract

The invention relates to a high-temperature binding agent of aluminum phosphosilicate and a preparation method of the high-temperature binding agent. The high-temperature binding agent comprises aluminum dihydrogen phosphate, silicate, metal and / or metal oxide, phosphoric acid, silica, an organic modifier, natural mineral powder and auxiliaries. Silicate is added into aluminum dihydrogen phosphate and reacts with carbon dioxide in air to form silicic acid sol, inorganic silica chain net-shaped macromolecules are formed along with evaporation and dehydration of water, the toughness of the binding agent is improved, and the brittleness is reduced; the silica and alumina generate mullite at high temperature, and the mullite has the advantages of uniform expansion, excellent thermal shock stability, small high-temperature creep value and high hardness, so that the high temperature resistance and corrosion resistance of the binding agent are improved; and the organic modifier has good film-forming property, and the formed film has excellent adhesive force, so that the film-forming property of the high-temperature adhesive at normal temperature can be improved.

Description

technical field [0001] The invention relates to the technical field of high-temperature binders, in particular to a high-temperature binder of aluminum phosphosilicate and a preparation method thereof. Background technique [0002] High-temperature adhesives have good bonding performance at low temperatures, excellent chemical stability at high temperatures, resistance to liquid and gas erosion, and high bonding strength. With the development of modern science and technology, high temperature adhesives have been widely used in aviation, aerospace, electronics, automobile and machinery manufacturing. High-temperature binders are divided into two categories: organic high-temperature binders and inorganic high-temperature binders. Generally, organic high-temperature binders can withstand high temperatures above 200°C, while inorganic high-temperature binders can withstand high temperatures at 600~ 800°C, and can reach above 1800°C after improving the composition. Inorganic hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J1/00C09J11/04C09J11/08
CPCC09J1/00C09J11/04C09J11/08Y02E60/10
Inventor 李潇咏廖欢莫友彬
Owner GUANGXI SANJING CHEM SCI & TECH
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