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Light stabilizer intermediate and preparation method thereof

A light stabilizer and intermediate technology, which is applied in the field of light stabilizer intermediates and their preparation, can solve problems such as intolerance to extraction, small molecular weight, poor compatibility of polymer materials, etc., and achieve low volatility and low production cost. Effect of low and superior polymer compatibility

Active Publication Date: 2020-10-09
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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  • Light stabilizer intermediate and preparation method thereof
  • Light stabilizer intermediate and preparation method thereof
  • Light stabilizer intermediate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 50g of p-bromostyrene to the reaction kettle, add 100g of xylene and 0.25g of hydroquinone, start stirring to mix evenly, and add 43.5g of 4-amino-2,2,6 dropwise at a temperature of 50-53°C, 6-Tetramethylpiperidine, add 37g of 30% lye dropwise at a temperature of 55-58°C after dropping, keep warm at 85-88°C for 4 hours, wash with water, and remove the solvent by rotary evaporation to obtain intermediate 2,2 , 75.2g of 6,6-tetramethyl-N-(4-vinylphenyl)piperidin-4-amine, the yield was 91.0%;

Embodiment 2

[0025] A preparation method of light stabilizer intermediate, comprising the following steps:

[0026] Add 100g of p-bromostyrene to the reaction kettle, add 250g of xylene and 0.55g of hydroquinone, start stirring to mix evenly, and add 92.5g of 4-amino-2,2,6 dropwise at a temperature of 57-60°C, 6-Tetramethylpiperidine, add 80.5g of 30% lye dropwise at a temperature of 62-65°C after dropping, keep warm at 90-93°C for 5 hours, wash with water, spin evaporate to remove the solvent to obtain intermediate 2, 2,6,6-Tetramethyl-N-(4-vinylphenyl)piperidin-4-amine 152.6g, yield 92.3%;

Embodiment 3

[0028] A preparation method of light stabilizer intermediate, comprising the following steps:

[0029] Add 156g of p-bromostyrene to the reaction kettle, add 624g of xylene and 0.92g of hydroquinone, start stirring to mix evenly, and add 144g of 4-amino-2,2,6,6 dropwise at a temperature of 60-63°C -Tetramethylpiperidine, add 135g of 30% lye dropwise at 63-65°C after dropping, keep warm at 98-100°C for 5.5 hours after dropping, wash with water, and remove the solvent by rotary evaporation to obtain intermediate 2,2, 6,6-Tetramethyl-N-(4-vinylphenyl)piperidin-4-amine 233.7g, yield 90.6%;

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Abstract

The invention belongs to the technical field of plastic additives, and particularly relates to a light stabilizer intermediate and a preparation method thereof. The preparation method comprises the following steps: taking 4-amino-2, 2, 6, 6-tetramethylpiperidine and p-bromostyrene as raw materials, reacting under the action of an acid-binding agent and a polymerization inhibitor so as to synthesize the light stabilizer intermediate 2, 2, 6, 6-tetramethyl-N-(4-vinylphenyl) piperidine-4-amine. The light stabilizer intermediate is a direct raw material of an important high-molecular-weight polymerization type light stabilizer, can synthesize graft polymerization type light stabilizers with different molecular weights, plays a role in inhibiting or slowing down degradation of a high polymer material due to photooxidation, and has the advantages of excellent thermal stability, low volatility, better compatibility with the high polymer material and the like; 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 light stabilizer intermediate 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 materials, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D211/58C08F112/14
CPCC07D211/58C08F112/28
Inventor 梁小龙祝君威范定孟解振海张超
Owner 宿迁联盛科技股份有限公司
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