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A kind of anti-cracking agent for surface layer and preparation method thereof

A technology of anti-cracking agent and surface layer, which is applied in the direction of coating, manufacturing tools, casting and molding equipment, etc., and can solve the problems of long drying time, increased production cost, and reduced production efficiency

Active Publication Date: 2019-08-23
江门市新灵科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a certain effect on the cracking of the surface layer, but the drying time is longer, the production efficiency is reduced, and the power consumption is large, resulting in an increase in production costs

Method used

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  • A kind of anti-cracking agent for surface layer and preparation method thereof
  • A kind of anti-cracking agent for surface layer and preparation method thereof
  • A kind of anti-cracking agent for surface layer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A surface layer anti-cracking agent, comprising the following components by weight percentage:

[0030]

[0031] The preparation method of above-mentioned surface layer anti-cracking agent comprises the following steps:

[0032] (1) Mix polyacrylamide and polyethylene glycol uniformly to obtain mixture A;

[0033] (2) Add mixture A to ethylene glycol under stirring condition, and mix uniformly to obtain mixture B;

[0034] (3) Add the mixture into pure influent water and stir for 24 hours until the mixture is uniform to obtain compound C;

[0035] (4) Add isopropanol polyoxyethylene ether into mixture C, stir until evenly mixed, and obtain compound D;

[0036] (5) Add the polyether defoamer defoamer to compound D, stir until the mixture is uniform, and then the surface layer anti-cracking agent is obtained.

Embodiment 2

[0038] A surface layer anti-cracking agent, comprising the following components by weight percentage:

[0039]

[0040]

[0041] The preparation method of above-mentioned surface layer anti-cracking agent comprises the following steps:

[0042] (1) Mix polyacrylamide and polyethylene glycol uniformly to obtain mixture A;

[0043] (2) Add mixture A to ethylene glycol under stirring condition, and mix uniformly to obtain mixture B;

[0044] (3) Add the mixture into pure influent water and stir for 26 hours until the mixture is uniform to obtain compound C;

[0045] (4) Add isopropanol polyoxyethylene ether into mixture C, stir until evenly mixed, and obtain compound D;

[0046] (5) Add the polyether defoamer defoamer to compound D, stir until the mixture is uniform, and then the surface layer anti-cracking agent is obtained.

Embodiment 3

[0048] A surface layer anti-cracking agent, comprising the following components by weight percentage:

[0049]

[0050] The preparation method of above-mentioned surface layer anti-cracking agent comprises the following steps:

[0051] (1) Mix polyacrylamide and polyethylene glycol uniformly to obtain mixture A;

[0052] (2) Add mixture A to ethylene glycol under stirring condition, and mix uniformly to obtain mixture B;

[0053] (3) Add the mixture into pure influent water, stir for 25 hours until the mixture is uniform, and obtain compound C;

[0054] (4) Add isopropanol polyoxyethylene ether into mixture C, stir until evenly mixed, and obtain compound D;

[0055] (5) Add the polyether defoamer to the compound D, stir until the mixture is uniform, and obtain the anti-cracking agent for the surface layer.

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Abstract

The invention relates to a surface layer anti-cracking agent and a preparation method for the surface layer anti-cracking agent. The surface layer anti-cracking agent comprises the following ingredients of, in percentage by weight, 0.02-1.0% of polyacrylamide, 0.1-2% of polyethylene glycol, 10-30% of ethylene glycol, 0.1-0.3% of polyether defoamer, 2-8% of a surface active agent and the balance purified water. The surface layer anti-cracking agent is suitable for a molten mold precision casting process, can be added to surface layer coating and also can be added to quilt layer coating; the surface layer anti-cracking agent is suitable for various powder materials in the precision casting industry, such as zircon sand powder, white corundum powder, brown fused alumina powder, quartz powder,mullite powder and the like; the surface layer anti-cracking agent is colorless liquid with no obvious stimulation and is not stratified when being placed for a long time; the surface layer anti-cracking agent is neutral and has no influence on the stability, quality and life of the surface layer coating; and the surface layer anti-cracking agent does not affect casting later treatment proceduresand the surface quality of workpieces.

Description

technical field [0001] The invention relates to a surface layer anti-cracking agent and a preparation method thereof. Background technique [0002] Surface layer anti-cracking agent is a compound chemical added to the surface layer coating to improve the normal temperature strength of the mold shell. It is an environmentally friendly formula product and is mainly used in the shell-making process in the investment precision casting industry. Due to external factors such as humidity and factors such as material expansion coefficient, castings of investment casting often have problems such as cracking, peeling and surface cracking. When the temperature is low, the humidity in the air is low. For precision castings with deep holes, large specific surface area, or large and heavy castings, in the drying process of the shell making process, due to the long drying time, The shell is prone to cracking. In the north, the degree of shell cracking caused by poor humidity control can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00
Inventor 唐忠禄
Owner 江门市新灵科技有限公司
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