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Long-storage-life triethylamine method cold core box curing agent and production method thereof

A technology of triethylamine method and cold core box, applied in the direction of core, casting molding equipment, casting mold, etc., can solve problems such as failure and deterioration of component two, and achieve the effect of improved use, good environmental protection performance, and low toxicity

Active Publication Date: 2015-09-23
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 main component of component 2 is isocyanate or its polymer. Because the isocyanate structure contains unsaturated bonds, it has high reactivity and is easy to react with compounds containing active hydrogen atoms: amines, water, alcohols, acids, and alkalis. Reaction to form dimers or high molecular weight polymers, leading to deterioration and failure of component two

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0016] Ⅰ. Pump 700 kg of isocyanate and 290 kg of environmentally friendly vegetable oil into the enamel reaction kettle with a vacuum pump, and start stirring;

[0017] Ⅱ. Stir for 1-1.5 hours, add 9 kg of high-efficiency phosphoric acid ester flame retardant, 1 kg of mixed polyol dibasic ester, and continue stirring;

[0018] Ⅲ. Stir for 1-1.5 hours to obtain the triethylamine method cold box curing agent, test and pack.

Embodiment example 2

[0020] Ⅰ. Pump 780 kg of isocyanate and 215 kg of environmentally friendly vegetable oil into the enamel reaction kettle with a vacuum pump, and start stirring;

[0021] Ⅱ. Stir for 1-1.5 hours, add 4.5 kg of high-efficiency phosphoric acid ester flame retardant, 0.5 kg of mixed polyol dibasic ester, and continue stirring;

[0022] Ⅲ. Stir for 1-1.5 hours to obtain the triethylamine method cold box curing agent, test and pack.

Embodiment example 3

[0024] Ⅰ. Pump 910 kg of isocyanate and 87.5 kg of environmentally friendly vegetable oil into the enamel reaction kettle with a vacuum pump, and start stirring;

[0025] Ⅱ. Stir for 1-1.5 hours, add 2.4 kg of high-efficiency phosphoric acid ester flame retardant, 0.1 kg of mixed polyol dibasic ester, and continue stirring;

[0026] Ⅲ. Stir for 1-1.5 hours to obtain the triethylamine method cold box curing agent, test and pack.

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PUM

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Abstract

The invention relates to a long-storage-life triethylamine method cold core box curing agent and a production method thereof. The long-storage-life cold core box curing agent comprises the following components in percentage by weight: 70-91% of isocyanate, 8-29% of environment-friendly plant oil, 0.2-1.0% of efficient phosphate fire retardant, and 0.01-0.1% of mixed polyols binary ester, wherein the isocyanate is one of toluene diisocynate, methylene diphenyl diisocyanate, 1, 6-hexamethylene diisocyanate, polymethylene polyphenyl isocyanate, trimethyl 1, 6 hexylidene diisocyanate and transcyclohexane diisocyanate or a combination thereof. The curing agent has the following beneficial effects: compared with such traditional materials as high-boiling-point aromatic solvent oil, the added plant oil is little in poison, is free of black smoke and poisonous gas in the resin sand pouring process, and is excellent in environmental protecting performance; and the efficient phosphate fire retardant and the mixed polyols binary ester effectively inhibit the activity of isocyanate radicals, prolong the storage life of the curing agent in air, and improve the use and storage performance in the production field.

Description

technical field [0001] The invention relates to the field of curing agents, in particular to a long-storage triethylamine cold box curing agent and a production method thereof. Background technique [0002] At present, in the cold box foundry industry, triethylamine is mainly used as catalyst. The binder system is composed of three parts: component one: phenylene ether type phenolic resin (resin), component two: isocyanate (curing agent), component three: triethylamine (catalyst). The main component of component 2 is isocyanate or its polymer. Because the isocyanate structure contains unsaturated bonds, it has high reactivity and is easy to react with compounds containing active hydrogen atoms: amines, water, alcohols, acids, and alkalis. Reaction to form dimers or high molecular weight polymers, leading to deterioration and failure of component two. Therefore, adding some polymerization inhibitors that can hinder the self-polymerization of isocyanate and effectively prolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/10B22C7/06
Inventor 韩文张茜王娟娟荆金龙
Owner 共享新材料(山东)有限公司
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