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Hindered amine light stabilizer and preparation method and application thereof

A technology of hindered amine light stabilizer and solvent is applied in the field of hindered amine light stabilizer and its preparation, and achieves the effects of good compatibility, high product yield, low volatility and low mobility

Active Publication Date: 2021-01-05
宿迁联盛科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The first object of the present invention is to provide a hindered amine light stabilizer, which can well solve the migration and extraction properties of the light stabilizer in the process of resisting light oxidation in polymer materials. question

Method used

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  • Hindered amine light stabilizer and preparation method and application thereof
  • Hindered amine light stabilizer and preparation method and application thereof
  • Hindered amine light stabilizer and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The preparation of the compound shown in formula II:

[0049] Add 155g of triacetone amine, 81g of dimethylamine, 400g of xylene and 120g of formic acid in a 2L reactor, under the protection of nitrogen, start stirring and heat up to reflux state, after 6 hours, the sampling test is qualified, and the reaction solution Cool down to room temperature, wash with aqueous sodium hydroxide solution (30%, wt.) and deionized water to weak alkalinity, and distill under negative pressure to obtain an intermediate with a yield of 97.5%.

[0050] Put the obtained intermediate into a 2L reaction kettle, add 126g dimethyl malonate, 200g xylene and 10g ammonium lithium to the kettle, start stirring and raise the temperature to 130-135°C, after 4 hours, the sampling test is qualified , quenched with an organic acid after cooling, washed with water and dried, vacuum distillation to obtain the compound shown in the target product formula II (wherein, R is a methyl group, specifically sho...

Embodiment 2

[0054] A preparation method of a hindered amine light stabilizer, comprising the steps of:

[0055] In the reactor of 3L, add the compound shown in the gained formula II of 500g embodiment 1, 371g and 1-(2'-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidine Alcohol and 630mL xylene are under the protection of nitrogen, start stirring and preheat to 130-135°C, then add 18g of sodium methoxide, the reaction temperature rises to 170-175°C, and methanol is evaporated. After 9 hours, the sampling test is qualified, and the temperature is washed with water. , drying and decolorization, and vacuum distillation to obtain a white powder, which is the hindered amine light stabilizer shown in the following formula, and the product yield is 83.5%.

[0056]

[0057] Its molecular weight is between 2100 and 4200.

[0058] It can be seen from the infrared spectrum at 2980cm -1 、1465cm -1 、1380cm -1 absorption peak, indicating the presence of -CH 3 、-CH 2 - stretching, bending vibration vC...

Embodiment 3

[0060] In the reactor of 3L, add the compound shown in the gained formula II of 500g embodiment 1, 408g and 1-(2'-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidine Alcohol and 660mL xylene were under the protection of nitrogen, started to stir and preheated to 130-135°C, then added 4g of tetraethyl titanate, the reaction temperature was raised to 170-175°C, accompanied by the distillation of methanol, after 8 hours, the sampling test was qualified , washed with water at lower temperature, dried and decolorized, and vacuum distilled to obtain a light yellow powder with a product yield of 87.6% and a molecular weight between 2100 and 4200.

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Abstract

The invention discloses a hindered amine light stabilizer, which has a structural formula I shown in the specification, in the formula I, R is selected from C1-C4 alkyl, and n is 5-10. Compared with atraditional hindered amine light stabilizer Tinuvin 622, the hindered amine light stabilizer is more reasonable in structure and more excellent in performance. The invention also discloses a preparation method and application of the hindered amine light stabilizer.

Description

technical field [0001] The invention relates to the technical field of light stabilizers. More specifically, it relates to a hindered amine light stabilizer and its preparation method and application. Background technique [0002] The hindered amine light stabilizer can effectively inhibit or block the free radicals generated in the photooxidation process from destroying the structure of the polymer material, thereby prolonging the service life of the polymer material. Hindered amine light stabilizers have been used more and more in the ever-expanding field of polymer materials. [0003] The low molecular weight hindered amine light stabilizer is easy to migrate from the inside to the outside in the polymer product during use, and is lost due to volatilization or medium extraction, resulting in yellowing and cracking of the polymer product, resulting in a decrease in strength, which directly affects Long-lasting photostability of polymer articles. Compared with low-molecu...

Claims

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Application Information

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IPC IPC(8): C08K5/3435C08L23/06C07D211/46
CPCC08K5/3435C07D211/46C08L2201/08C08L23/06Y02P20/52
Inventor 蔡红云韩炎江赛杨光项有和
Owner 宿迁联盛科技股份有限公司
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