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Tung oil modified triethylamine cold-box resin component I and production method thereof

A technology of triethylamine and cold core box, applied in the direction of core, casting molding equipment, casting mold, etc., can solve the problems of sand inclusion, cold core box resin sand casting veining, environmental pollution, etc., to improve room temperature performance and High temperature performance, improved humidity resistance and environmental protection performance, the effect of prolonging the usable time

Inactive Publication Date: 2017-08-22
GANSU KOCEL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the high temperature performance of cold box resin component I will directly affect the quality of castings, resulting in defects such as veins and sand inclusions in cold box resin sand castings
In addition, resin component I contains incompletely reacted free phenol and free formaldehyde, which will cause certain pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Melt 25% phenol into the reaction kettle, start the mixer, add tung oil 7%, 10% hydrochloric acid aqueous solution 0.01%, open the steam valve, heat up to 120°C for 40-50min, and keep warm for 1h;

[0041] (2) Cool down to 60°C, add 11% paraformaldehyde, 2% methanol, and 0.04% zinc acetate;

[0042] (3) Heat up to 110±1°C within 40-50min, and react at constant temperature for 1h;

[0043] (4) Heat up to 115±1°C within 15-20min, and react at constant temperature for 1h;

[0044] (5) After the heat preservation is over, continue to heat up and dehydrate under normal pressure. When the temperature in the kettle rises to 120±1°C, time the constant temperature reaction for 0.5h;

[0045] (6) After the constant temperature reaction is over, turn on the vacuum and dehydrate at a vacuum degree of -0.06MPa for 2 hours;

[0046] (7) After dehydration, add 21.95% dibasic acid ester, 25% S-150, 3% cresyl diphenyl phosphate, 4.5% ethyl silicate, stir and cool down;

[0047](8...

Embodiment 2

[0049] (1) Melt 31% phenol into the reaction kettle, start the mixer, add tung oil 2%, 10% hydrochloric acid aqueous solution 0.02%, open the steam valve, heat up to 110°C for 40-50min, and keep warm for 2h;

[0050] (2) Cool down to 60°C, add 15% paraformaldehyde, 1.5% methanol, and 0.06% zinc acetate;

[0051] (3) Heat up to 110±1°C within 40-50min, and react at constant temperature for 0.5h;

[0052] (4) Heat up to 115±1°C within 15-20min, and react at constant temperature for 1h;

[0053] (5) After the heat preservation is over, continue to heat up and dehydrate under normal pressure. When the temperature in the kettle rises to 120±1°C, time and constant temperature reaction for 1.5h;

[0054] (6) After the constant temperature reaction is over, turn on the vacuum and dehydrate at a vacuum degree of -0.07MPa for 1.5h;

[0055] (7) After dehydration, add 24% of dibasic acid ester, 16.92% of S-200, 2.5% of diphenyl-isooctyl phosphate, 6% of ethyl silicate, stir and cool do...

Embodiment 3

[0058] (1) Melt 34% phenol into the reaction kettle, start the mixer, add tung oil 8%, 10% hydrochloric acid aqueous solution 0.03%, open the steam valve, heat up to 100°C for 40-50min, and keep warm for 3h;

[0059] (2) Cool down to 60°C, add 19% paraformaldehyde, 1.5% methanol, and 0.08% zinc acetate;

[0060] (3) Heat up to 110±1°C within 40-50min, and react at constant temperature for 1h;

[0061] (4) Heat up to 115±1°C within 15-20min, and react at constant temperature for 1.5h;

[0062] (5) After the heat preservation is over, continue to heat up and dehydrate under normal pressure. When the temperature in the kettle rises to 120±1°C, time the constant temperature reaction for 1 hour;

[0063] (6) After the constant temperature reaction is over, turn on the vacuum and dehydrate at a vacuum degree of -0.08MPa for 1.5h;

[0064] (7) After dehydration, add 16.89% dibasic acid ester, 14% S-150, 2.5% methyl o-toluate, 3.5% ethyl silicate, stir and cool down;

[0065] (8) W...

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Abstract

In allusion to problems existing in the prior art, the invention provides a production method of a tung oil modified triethylamine cold-box resin component I. The production method of the tung oil modified triethylamine cold-box resin component I includes the following raw materials (by weight): 25-40% of phenol, 2-8% of tung oil, 0.01-0.04% of a catalyst 1, 11-19% of paraformaldehyde, 0.04-0.1% of a catalyst 2, 1-2% of a regulator, 12-24% of dibasic acid ester, 14-25% of high-boiling-point aromatic solvent oil, 2.5-5% of a high-boiling-point plasticizer, 2-6% of ethyl silicate and 0.5-1% of a reinforcing agent. According to the invention, tung oil and phenol are subjected to a cationic alkylation reaction under an acidic condition, and then modified phenol and formaldehyde react to generate tung oil modified phenolic resin. Then, the triethylamine cold-box resin component I which has high molding-sand strength, good high-temperature property and good wet resistance, has long service time and excellent environment protection property and can satisfy batch core production is obtained.

Description

technical field [0001] The invention relates to the field of preparing triethylamine cold box resin for casting, in particular to a production method of tung oil modified triethylamine cold box resin component I. Background technique [0002] Triethylamine cold box core making is a core making technology introduced to the foundry industry by Ashland Oleochemical Company of the United States in 1968. It has many advantages such as high production efficiency, high dimensional accuracy of sand core, good collapsibility, and low comprehensive cost. , soon after it was launched, it was welcomed by the foundry industry at home and abroad, and has been widely used. Today, it is the most commonly used core-making process in the foundry industry. The amount of domestic cold box resin is relatively small at present, accounting for about 12% of the total consumption of foundry resin binders, but the proportion is increasing year by year, showing that its future market demand has good ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08K5/00C08K5/523C08K5/101C08K5/544C08K5/5435C08K5/5419C08G8/32B22C1/22B22C7/06
CPCC08K5/00B22C1/22B22C7/06C08G8/32C08K5/101C08K5/523C08K5/5419C08K5/5435C08K5/544C08K2201/014C08L61/14
Inventor 崔刚韩文张宏凯张茜
Owner GANSU KOCEL CHEM
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