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Production process of benzotriazole type ultraviolet light absorber UV1130

A technology of UV1130 and benzotriazoles, which is applied in the direction of organic chemistry, can solve the problems of low final product yield, low reaction temperature, and high production cost, and achieve the goal of improving reaction purity, saving energy consumption, and suppressing side reactions. Effect

Active Publication Date: 2017-04-26
江苏富比亚化学品有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, UV1130 often uses o-nitroaniline, 3-(3-tert-butyl-4-hydroxy-phenyl)-propionic acid methyl ester, etc. as the main raw materials, after Michael addition, dealkylation, diazotization, Coupling, reduction, esterification and other multi-step reaction synthesis, the reaction temperature in the coupling reaction is low (0 ~ 5 ° C), the side reactions in the reaction make the final product yield low, and the production cost is high

Method used

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  • Production process of benzotriazole type ultraviolet light absorber UV1130
  • Production process of benzotriazole type ultraviolet light absorber UV1130
  • Production process of benzotriazole type ultraviolet light absorber UV1130

Examples

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Embodiment 1

[0079] Put 280g of 3-tert-butyl methyl p-hydroxyphenylpropionate into the hydrolysis kettle, put 326g of 30% liquid caustic soda into the kettle from the liquid caustic soda metering tank, close the reaction kettle, and raise the temperature to 85°C for reflux reaction under normal pressure At the same time, the methanol produced by the reaction is evaporated, and after condensation, it is put into the methanol receiving tank. After the reaction is completed for 2 hours, it is left to stand, and the material is transferred to the coupling kettle;

[0080] Stir the feed liquid in the coupling kettle, cool down to 25°C, add 1.2g of C10 alcohol, add 720g of diazonium hydrochloride solution of o-nitroaniline to the kettle dropwise from the diazo solution dropping tank, and control the reaction temperature at 25°C during the dropping process. ~30°C, add dropwise for 5 hours, stop the reaction after the sampling test is qualified; after the reaction, add liquid caustic soda to the co...

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Abstract

The invention discloses a production process of a benzotriazole type ultraviolet light absorber UV1130. The production process comprises the steps that 3-tertiary butyl para hydroxybenzene propionate and alkali are added into a reaction container for hydrolysis reaction, and then a diazonium salt solution of ortho-nitroaniline is added to a reaction system for coupling reaction; hydrogen is led after reaction is completed, an intermediate product is obtained and reacts with polyethylene glycol, and finally the product UV1130 is prepared. A catalyst is added in the coupling reaction, so that the reaction is performed at normal temperature, side reaction can be effectively inhibited, the purity and yield of the product can be improved, and the production cost can be reduced.

Description

technical field [0001] The invention relates to the field of fine chemicals, in particular to a production process of a benzotriazole ultraviolet absorber UV1130. Background technique [0002] Ultraviolet rays in sunlight can prompt the human body to synthesize vitamins and kill some microorganisms or viruses, but the increase of ultraviolet rays can also cause major harm and impact on human life. Exposure of plastics, dyes, paints, synthetic rubber, synthetic fibers, agricultural films, plexiglass, etc. to sunlight or artificial ultraviolet light will accelerate discoloration, embrittlement, cracking and peeling of paint layers, and fading of dyes, mainly because these materials absorb The energy of ultraviolet light triggers auto-oxidation reaction, leading to photodegradation. In order to prevent dyes from fading, photoaging of polymer materials, and prolong their service life, it is very necessary to add light stabilizers to polymer materials. [0003] Ultraviolet abso...

Claims

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Application Information

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IPC IPC(8): C07D249/20C07C43/11
CPCC07C43/11C07D249/20
Inventor 吴邦元施仲锋施波李焕成孙斌赵舰
Owner 江苏富比亚化学品有限公司
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