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A kind of modified triethylamine cold box resin with good moisture resistance and production method thereof

A technology of moisture resistance and triethylamine, applied in the field of epoxy modified triethylamine cold core box resin, can solve the problems of difficulty in production, reduction of sand core strength, limitation of the use of triethylamine cold core box resin sand, etc. Achieve the effect of improving water resistance, improving resin strength and high temperature performance, and avoiding water reaction

Active Publication Date: 2022-02-18
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

[0003] However, because the triethylamine cold box method resin sand will be affected by the environment during the sand mixing, air blowing curing process and storage period after curing, the use of triethylamine cold box method resin sand is limited
Because the polyurethane produced by the reaction is easy to hydrolyze under the action of water, and this phenomenon is more obvious in a humid environment, which may lead to a decrease in the strength of the sand core and cause difficulties in production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Melt 32% phenol and put it into the reaction kettle, start the mixer, add 13% paraformaldehyde, 0.05% zinc acetate, and 2% methanol;

[0040] 2. Open the steam valve, raise the temperature to 100±1°C, and react at constant temperature for 1 hour;

[0041] 3. Heat up to 110±1°C, and react at constant temperature for 2 hours;

[0042] 4. Add 7% epichlorohydrin and 0.3% 30% NaOH aqueous solution, heat up and reflux for 1 hour;

[0043] 5. After the reflux, turn on the vacuum pump for vacuum dehydration;

[0044] 6. After dehydration, add 8% dibasic acid ester, 33% S-150 solvent, 2.05% paraffin oil, 2% synthetic vegetable ester, stir and cool down;

[0045] 7. Cool down to below 40°C, add 0.6% KH-540 silane, stir and discharge evenly.

Embodiment 2

[0047] 1. Melt 28% phenol and put it into the reaction kettle, start the mixer, add 18% paraformaldehyde, 0.2% zinc acetate, and 3% ethanol;

[0048]2. Open the steam valve, raise the temperature to 100±1°C, and react at constant temperature for 2 hours;

[0049] 3. Heat up to 110±1°C within 10-20min, and react at constant temperature for 1h;

[0050] 4. Add 5% epichlorohydrin, 0.1% 30% NaOH aqueous solution, heat up and reflux for 1.5h;

[0051] 5. After the reflux, turn on the vacuum pump for vacuum dehydration;

[0052] 6. After dehydration, add 11.9% dibasic acid ester, 23% S-150 solvent, 6% paraffin oil, 4% synthetic vegetable ester, stir and cool down;

[0053] 7. Cool down to below 40°C, add KH-550 silane 0.8%, stir evenly and discharge.

Embodiment 3

[0055] 1. Melt 38% phenol and put it into the reaction kettle, start the mixer, add 14% paraformaldehyde, 0.1% zinc acetate, and 1.5% methanol;

[0056] 2. Open the steam valve, raise the temperature to 100±1°C, and react at constant temperature for 2 hours;

[0057] 3. Heat up to 110±1°C, and react at constant temperature for 1 hour;

[0058] 4. Add 2% epichlorohydrin, 0.5% 30% NaOH aqueous solution, heat up and reflux for 0.5h;

[0059] 5. After the reflux, turn on the vacuum pump for vacuum dehydration;

[0060] 6. After dehydration, add 14% dibasic acid ester, 23.9% S-150 solvent, 2% paraffin oil, 3% synthetic vegetable ester, stir and cool down;

[0061] 7. Cool down to below 40°C, add 0.5% KH-560 silane, stir and discharge evenly.

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Abstract

The invention provides a modified triethylamine cold box resin with good moisture resistance, which comprises the following components: phenol, paraformaldehyde, catalyst 1, regulator, epichlorohydrin, catalyst 2, and high-boiling point aromatic hydrocarbon solvent oil , dibasic acid ester, synthetic vegetable ester, paraffin oil and silane coupling agent; the mass percentages of the above components are: phenol 28%-38%, paraformaldehyde 10%-18%, catalyst 1 0.05%-0.2% , Regulator 1%-3%, Epichlorohydrin 2%-7%, Catalyst 2 0.05%-0.5%, High boiling point aromatic solvent oil 23%-33%, Dibasic acid ester 8%-14%, Synthetic plant Ester 2%-6%, paraffin oil 2%-6%, and silane coupling agent 0.5%-1%. Thus, the present invention carries out epoxy modification to the linear high ortho-position phenolic resin of triethylamine cold box resin component I through modifier epichlorohydrin, obtains a kind of good moisture resistance, high molding sand strength, high temperature The triethylamine cold box resin with good performance and excellent environmental protection performance can meet the batch core production and has important industrial significance.

Description

technical field [0001] The invention relates to a production method of triethylamine cold box resin for casting, in particular to a production method of epoxy-modified triethylamine cold box resin suitable for non-ferrous alloy castings. Background technique [0002] Triethylamine cold box core making is a core making technology launched by Ashland Company in the United States in 1968. It has been widely used because of its many advantages such as high production efficiency, high dimensional accuracy of sand cores, good collapsibility, and low overall cost. , has become the most commonly used core-making process in the foundry industry, and its future market demand has good growth potential. [0003] However, because the triethylamine cold box method resin sand will be affected by the environment during the sand mixing, air blowing curing process and storage after curing, the use of the triethylamine cold box method resin sand is limited. Because the polyurethane produced b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/28C08G8/10B22C7/06B22C1/22
CPCC08G8/10C08G8/28B22C1/2253B22C7/06
Inventor 张宏凯崔刚韩文
Owner 共享新材料(山东)有限公司
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