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A kind of anti-moisture absorption adhesive and its preparation method and application

A binder and silane coupling agent technology, which is applied in the field of casting sand binder preparation, can solve the problems of increasing the complexity of the process and operation, deteriorating the working environment, and flying dust, so as to improve working conditions, protect the environment, Effect of improving room temperature strength

Active Publication Date: 2020-06-09
JINAN SHENGQUAN GRP SHARE HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned water glass binder mainly uses water glass as the main raw material, and the binder developed by adding the second component solid appendage, although it has improved the performance of aspects such as strength, molding, fluidity, etc., because The unique hygroscopicity of water glass needs to be further improved in the moisture resistance of the core sand, the deformation of the casting and the surface quality of the casting; and the continuity of the solid addition is poor, and the dust is flying during the feeding, which deteriorates the working environment. And from the perspective of production efficiency, it also increases the complexity of additional processes and operations

Method used

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  • A kind of anti-moisture absorption adhesive and its preparation method and application
  • A kind of anti-moisture absorption adhesive and its preparation method and application
  • A kind of anti-moisture absorption adhesive and its preparation method and application

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Effect test

Embodiment 1

[0046] The preparation method of the binding agent provided in this embodiment is as follows:

[0047] Add 200g of water glass into a three-necked flask, place it in an oil bath at 90°C, start stirring, slowly add 6g of amorphous silica, 4g of silane coupling agent, heat and stir for 2 hours to obtain a binder.

[0048] Among them, the modulus of water glass is 2.3, and the density is 1.6g / cm 3 , Amorphous silica is prepared by pyrolysis method, with a particle size of 5 μm; the silane coupling agent is γ-(2,3-glycidoxy)propyltrimethoxysilane.

Embodiment 2

[0050] The preparation method of the binding agent provided in this embodiment is as follows:

[0051] Add 200g of water glass into a three-necked flask, place it in an oil bath at 90°C, start stirring, slowly add 6g of amorphous silica, 4g of silane coupling agent and 2g of sorbitol, heat and stir for 2 hours to obtain a binder.

[0052] Among them, the modulus of water glass is 2.3, and the density is 1.6g / cm 3 , Amorphous silica is prepared by pyrolysis method, with a particle size of 5 μm; the silane coupling agent is γ-(2,3-glycidoxy)propyltrimethoxysilane.

Embodiment 3

[0054] The preparation method of the binding agent provided in this embodiment is as follows:

[0055] Add 200g of water glass into a three-necked flask, place it in an oil bath at 90°C, start stirring, slowly add 6g of amorphous silica, 4g of silane coupling agent and 4g of sorbitol, heat and stir for 2 hours to obtain a binder.

[0056] Among them, the modulus of water glass is 2.3, and the density is 1.6g / cm 3 , Amorphous silica is prepared by pyrolysis method, with a particle size of 5 μm; the silane coupling agent is γ-(2,3-glycidoxy)propyltrimethoxysilane.

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Abstract

The invention provides an anti-moisture-absorption adhesive and a preparation method and application thereof. Preparation raw materials of the adhesive comprise the following components of, by weight,70-90 parts of water glass, 1-20 parts of amorphous silica, 0.5-10 parts of a silane coupling agent and 1-5 parts of sugar alcohol. According to the anti-moisture-absorption adhesive and the preparation method and application thereof, the water glass is modified, and anti-moisture-absorption modified water glass is obtained and serves as the adhesive. The adhesive provided by the invention comprises the amorphous silica, the silane coupling agent and the sugar alcohol which interact with one another, the synergetic effect is achieved, the amorphous silica, the silane coupling agent and the sugar alcohol are well compatible with the water glass, meanwhile, the hydrophobic characteristic is given to the water glass, the moisture absorption resistance of the water glass is improved, and accordingly, the adhesive provided by the invention has the moisture absorption resistance.

Description

technical field [0001] The invention belongs to the field of preparation of molding sand binder for foundry, relates to a binder and its preparation method and application, in particular to a moisture absorption-resistant binder and its preparation method and application. Background technique [0002] Building an environment-friendly society has increasingly become the consensus of the public. Industries that pollute the environment in industrial production are facing technological reforms. The "dirty, messy, and poor" foundry has always troubled people. The focus of foundry industry reform is non-polluting molding sand binders. development. Sodium silicate sand has become the first choice for green casting because it is colorless, odorless, non-toxic, and has no irritating and toxic gases during sand mixing, molding, pouring and shakeout. [0003] Poor moisture absorption resistance is a common problem that water-based binders for casting have not yet solved well. For exam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/18
CPCB22C1/188
Inventor 祝建勋白世龙张用吉
Owner JINAN SHENGQUAN GRP SHARE HLDG CO LTD
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