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A kind of production method of alkali phenolic curing agent for casting

A production method and curing agent technology, applied in the direction of casting molding equipment, casting molds, manufacturing tools, etc., can solve the problems of poor quality of curing agent, inability to overcome, low cost of water glass sand, etc., to achieve good performance of process products, prevent The effect of stomata

Active Publication Date: 2016-08-24
共享新材料(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The domestic application began in the late 1980s, and it was not too late to start the application. However, due to the low domestic quality requirements for steel castings and the low cost of water glass sand, the alkaline phenolic resin sand process has not been well developed. Therefore, the production of domestic steel castings uses alkaline phenolic resin sand technology is relatively small, which is also one of the reasons for the generally poor quality of domestically produced ester-cured alkaline phenolic resins and curing agents
[0003] So far there is no way to overcome the above drawbacks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment one: a kind of production method of alkali phenolic curing agent for foundry, the method comprises the steps:

[0014] Ⅰ. Start the mixer, add propylene carbonate: 12%, glyceryl triacetate: 58%, 1,4 butyrolactone: 30% to the reactor in turn;

[0015] Ⅱ. After the feeding is completed, continue to stir for 30 minutes before discharging, measuring and packaging.

[0016] Description: This KPE organic ester curing agent is suitable for core production at a sand temperature of 0°C-5°C, and the addition amount accounts for 20%-25% of the weight of the resin.

Embodiment 2

[0017] Embodiment two: a kind of production method of alkali phenolic solidifying agent for foundry, the method comprises the steps:

[0018] Ⅰ. Start the mixer, add propylene carbonate: 5%, glyceryl triacetate: 70%, 1,4 butyrolactone: 25% to the reactor in turn;

[0019] Ⅱ. After the feeding is completed, continue to stir for 30 minutes before discharging, measuring and packaging.

[0020] Description: This KPE organic ester curing agent is suitable for core production at a sand temperature of 10°C-20°C, and the addition amount accounts for 20%-25% of the weight of the resin.

Embodiment 3

[0021] Embodiment three: a kind of production method of alkali phenolic curing agent for foundry, the method comprises the steps:

[0022] Ⅰ. Start the mixer, add glycerol triacetate: 60%, 1,4 butyrolactone: 10%, dicarboxylic acid ester: 30% to the reaction kettle in turn;

[0023] Ⅱ. After the feeding is completed, continue to stir for 30 minutes before discharging, measuring and packaging.

[0024] Description: This KPE organic ester curing agent is suitable for core-making production under the condition of sand temperature 25°C-35°C, and the addition amount accounts for 20%-25% of the weight of the resin.

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Abstract

The invention relates to a production method of a curing agent, in particular to a production method of an alkali phenolic curing agent for casting. Propylene ester, 30%-70% glyceryl triacetate, 10%-30% 1,4 butyrolactone and 0%-30% dibasic carboxylate, after adding, continue stirring for 30-40 minutes, The material is discharged, measured and packaged, and the content of the above-mentioned raw materials is a percentage by weight; the method of the invention is unique, can effectively prevent defects such as air holes and cracks in steel castings, and the performance of the process product is good.

Description

technical field [0001] The invention relates to a production method of a curing agent, in particular to a production method of an alkali phenolic curing agent for casting. Background technique [0002] Traditional ester-cured basic phenolic resin curing agents use organic esters as raw materials, mainly glycerin acetate, and also use organic esters such as propylene carbonate, γ-butyrolactone, dibasic esters, and glyceryl triacetate as raw materials. . The addition of curing agent can not change the hardening speed, but can only achieve the purpose of changing the hardening speed by adjusting the type of ester. The domestic application began in the late 1980s, and it was not too late to start the application. However, due to the low domestic quality requirements for steel castings and the low cost of water glass sand, the alkaline phenolic resin sand process has not been well developed. Therefore, the production of domestic steel castings uses alkaline phenolic resin sand ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/22
Inventor 韩文何龙杨洋
Owner 共享新材料(山东)有限公司
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