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Triglycidyl isocyanurate production method

A technology of glycidyl ester and triisocyanurate, which is applied in the production field of curing agent TGIC, can solve problems such as epichlorohydrin residues, and achieve the effects of mild preparation process conditions, reduced production costs, and stable processes

Active Publication Date: 2013-09-25
HUANGSHAN HUAHUI TECH
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of epichlorohydrin (ECH) residues in triglycidyl isocyanurate (TGIC) products; to provide a preparation method for TGIC without ECH residues, and the preparation process conditions are mild and recyclable All ECH solvents improve the working environment, reduce production costs, the process is stable and safe, and the product performance indicators are excellent

Method used

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Embodiment Construction

[0018] 1. A production process of triglycidyl isocyanurate without epichlorohydrin residue

[0019] The production of triglycidyl isocyanurate without epichlorohydrin residue comprises the following steps:

[0020] (1) Synthesis: Take 200kg of cyanuric acid, 2200kg of epichlorohydrin and 10kg of benzyltriethylammonium chloride and put them into the reaction kettle. Transfer the synthesis liquid to the cyclization kettle, add 190kg of sodium hydroxide in batches, control the reaction temperature at 15°C, add sodium hydroxide in batches, continue the reaction for 60 minutes, and remove the solid salt by pressure filtration after the cyclization is completed; The filtrate is pumped into the washing layered tank, added with water, stirred, and left to stand; the lower layer slurry is the crude product of triglycidyl isocyanurate containing the organic solvent epichlorohydrin.

[0021] (2) Distillation:

[0022] (a) Add the crude product of triglycidyl isocyanurate containing the...

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Abstract

The invention relates to a triglycidyl isocyanurate production method comprising the steps of synthesizing, distillation, crystallization, centrifugation, and drying. Especially, in the distillation process, a solvent which has a boiling point lower than 110 DEG C, which can be subjected to binary azeotrope with epoxy chloropropane, and which cannot be subjected to a reaction with components of the reaction system is slowly added, wherein an addition amount is 5-10% of that of a triglycidyl isocyanurate crude product. The materials are stirred for 20min; through reduced-pressure distillation under a vacuum degree of -0.090MPa to -0.0999MPa, solvent and epoxy chloropropane are removed by azeotrope, wherein a temperature is controlled under 95 DEG C. With the method, preparation process conditions are mild, all ECH solvent can be recovered, working environment can be improved, production cost can be reduced, and the process is stable and safety. Various performance indexes of the product are excellent. With the triglycidyl isocyanurate production method, no epoxy chloropropane residue is caused.

Description

technical field [0001] The invention relates to a production method of a curing agent TGIC, in particular to a production method of triglycidyl isocyanurate. Background technique [0002] Triglycidyl isocyanurate (TGIC for short) is a heteropolyepoxide with good heat resistance, high temperature resistance and chemical properties. In addition to being used as powder coating curing agent, TGIC products are also used in medicine, electronics and other industries. In recent years, with the rapid development of the electronics industry, the degree of integration of electronic components is increasing day by day, the market is growing rapidly, and the requirements for various performance indicators of TGIC are higher. The existence of the solvent epichlorohydrin (ECH) in TGIC products not only affects the application curing performance of the product and reduces the service life of the product, but also the solvent residue volatilizes into the air, pollutes the environment, enda...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D405/14
Inventor 方向宏杨志萍项纯何领汤增荣曹镇
Owner HUANGSHAN HUAHUI TECH
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