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Graft polymerization type light stabilizer and preparation method thereof

A technology of light stabilizer and graft polymerization, which is applied in the field of graft polymerization type light stabilizer and its preparation, can solve the problems of small molecular weight, poor compatibility of polymer materials, intolerant of extraction, etc., and achieves low volatility , Superior polymer compatibility, good compatibility effect

Inactive Publication Date: 2020-10-30
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

However, the molecular weight of the existing hindered amine light stabilizers is generally small, the compatibility with polymer materials is not good, and they are not resistant to extraction. Therefore, research on high molecular weight hindered amine light stabilizers is the leading trend in the light stabilizer market.

Method used

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  • Graft polymerization type light stabilizer and preparation method thereof
  • Graft polymerization type light stabilizer and preparation method thereof
  • Graft polymerization type light stabilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of a graft polymerization type light stabilizer, comprising the following steps:

[0029] Add 75.2g intermediate 2,2,6,6-tetramethyl-N-(4-vinylphenyl)piperidin-4-amine, 225g xylene, 0.38g titanocene dichloride to the polymerization reactor and 0.076g co-catalyst MAO, after replacing the air with nitrogen, start stirring to make the materials fully mixed, then feed nitrogen to make the pressure in the kettle reach 1.2Mpa, turn on the heating system and raise the temperature to 120°C for 5 hours, then cool down and wash with water, divide the water After that, 0.75 g of activated carbon was added to the organic layer for dehydration and decolorization, filtered, and the filtrate was directly distilled to obtain 69.8 g of the graft polymerization type light stabilizer, and the yield of this step was 92.8%.

Embodiment 2

[0031] A preparation method of a graft polymerization type light stabilizer, comprising the following steps:

[0032] Add 152.6g intermediate 2,2,6,6-tetramethyl-N-(4-vinylphenyl)piperidin-4-amine, 535g xylene, 0.91g titanocene dichloride to the polymerization reactor and 0.16g co-catalyst MAO, after replacing the air with nitrogen, start stirring to make the materials fully mixed, then feed nitrogen to make the pressure in the kettle reach 2.0Mpa, turn on the heating system and raise the temperature to 140°C for 6 hours, then cool down and wash with water, divide the water Then add 1.55g of activated carbon to the organic layer for dehydration and decolorization, filter, and distill the filtrate to obtain 140.3g of the graft polymerization light stabilizer, the yield of this step is 91.9%.

Embodiment 3

[0034] A preparation method of a graft polymerization type light stabilizer, comprising the following steps:

[0035] Add 233.7g intermediate 2,2,6,6-tetramethyl-N-(4-vinylphenyl)piperidin-4-amine, 930g xylene, 2.33g dichlorozirconocene to the polymerization reactor and 0.62g co-catalyst EAO, after replacing the air with nitrogen, turn on the stirring to make the materials fully mixed, then pass in nitrogen to make the pressure in the kettle reach 2.5Mpa, turn on the heating system and raise the temperature to 150°C for 6 hours, then cool down and wash with water, divide the water Then add 2.5 g of activated carbon to the organic layer for dehydration and decolorization, filter, and distill the filtrate to obtain 209.8 g of the graft polymerization light stabilizer, and the yield of this step is 89.7%.

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Abstract

The invention belongs to the technical field of plastic additives, in particular to a graft polymerization type light stabilizer and a preparation method thereof. The preparation method comprises thefollowing steps of: synthesizing an intermediate 2, 2, 6, 6-tetramethyl-N-(4-vinylphenyl) piperidine-4-amine from 4-amino-2, 2, 6, 6-tetramethylpiperidine and p-bromostyrene as raw materials under theaction of an acid-binding agent, carrying out polymerization reaction on the intermediate under the conditions of a catalyst, high temperature, high pressure and the like, cooling the reaction product, washing the reaction product with water, adding activated carbon for dehydrating and decolorizing, carrying out filtering, and distilling the filtrate to obtain the graft polymerization type lightstabilizer. The graft polymerization type light stabilizer is an auxiliary agent capable of inhibiting or slowing down degradation of a high polymer material due to photooxidation, is excellent in thermal stability and low in volatility, and has better compatibility with the high polymer material. The synthesis process is simple, the preparation cost is low, and the yield is high.

Description

technical field [0001] The invention belongs to the technical field of plastic additives, in particular to a graft polymerization light stabilizer and a preparation method thereof. Background technique [0002] Light stabilizer is an additive of polymer products, it can shield or absorb the energy of ultraviolet rays, quench singlet oxygen and decompose hydroperoxide into inactive substances, etc. , can eliminate or slow down the possibility of photochemical reaction, prevent or delay the process of photoaging, so as to achieve the purpose of prolonging the service life of polymer products. [0003] Hindered amines are a class of organic amine compounds with steric hindrance, which have a good inhibitory effect on the photo-oxidative degradation of polymers and organic compounds, and are a class of light stabilizers with excellent performance. However, the existing hindered amine light stabilizers generally have a small molecular weight, poor compatibility with polymer mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/3435C07D211/58
CPCC07D211/58C08K5/3435
Inventor 祝君威刘波江赛蔡红云苏波张超
Owner 宿迁联盛科技股份有限公司
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