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Hindered amine light stabilizer and preparation process thereof

A light stabilizer and hindered amine technology, which is applied in the field of hindered amine light stabilizers and their preparation technology, can solve the problems of poor performance and low proportion of hindered amine groups, and achieve low price, mild reaction conditions, and easy preparation Effect

Inactive Publication Date: 2021-01-01
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

[0004] The existing light stabilizer 770 contains a relatively low proportion of hindered amine groups, and its performance is relatively poor. The produced hindered amine light stabilizer cannot meet the production needs of existing enterprises

Method used

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  • Hindered amine light stabilizer and preparation process thereof
  • Hindered amine light stabilizer and preparation process thereof
  • Hindered amine light stabilizer and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of light stabilizer, comprising the following steps:

[0030] Add 500g of xylene solvent into a 3L high-pressure reactor, add 92g of cyanuric chloride at room temperature, control the temperature below 50°C and add 205g of N-butyl-2,2,6,6-tetramethyl dropwise under stirring -4-Piperidinamine, the dropwise addition was completed in about 20 minutes. After the dropping, the temperature was controlled at 55°C for 2 hours. The liquid phase detection raw material cyanuric chloride was completely reacted, and then 110g of sodium hydroxide solution with a mass fraction of 40% was added dropwise. , the temperature was raised to 60° C. for 5 hours, and after the reaction was complete, 200 g of water was added to wash with water, and the water was separated after washing with water for 3 times. Add 60g of 40% sodium hydroxide solution and 10g of PEG-400 to the system, close the autoclave, react at 160°C for 10h, and then cool down to 90°C;

[0031] The salt ...

Embodiment 2

[0033] A preparation method of light stabilizer, comprising the following steps:

[0034] Add 500g of xylene solvent into a 3L high-pressure reactor, add 92g of cyanuric chloride at room temperature, control the temperature below 50°C and add 220g of N-butyl-2,2,6,6-tetramethyl dropwise under stirring -4-Piperidinamine, the dropwise addition is completed in about 20 minutes, after the dropwise reaction, the temperature is controlled at 50°C for 2 hours, the liquid phase detection raw material cyanuric chloride has completely reacted, and then 110g of sodium hydroxide solution with a mass fraction of 40% is added dropwise , the temperature was raised to 60° C. for 5 hours, and after the reaction was complete, 200 g of water was added to wash with water, and the water was separated after washing with water for 3 times. Add 60g of 40% sodium hydroxide solution and 10g of PEG-400 into the system, close the autoclave, react at 160°C for 12h, and then cool down to 90°C;

[0035] Th...

Embodiment 3

[0037] A preparation method of light stabilizer, comprising the following steps:

[0038] Add 1000g of xylene solvent into a 3L autoclave, add 184g of cyanuric chloride at room temperature, control the temperature below 50°C and add 460g of N-butyl-2,2,6,6-tetramethyl dropwise under stirring -4-Piperidinamine, the dropwise addition is completed in about 20 minutes, after the dropping, the temperature is controlled at 50°C for 2 hours, the liquid phase detection raw material cyanuric chloride has completely reacted, and then 200g of sodium hydroxide solution with a mass fraction of 40% is added dropwise , the temperature was raised to 60° C. for 5 hours, and after the reaction was complete, 200 g of water was added to wash with water, and the water was separated after washing with water for 3 times. Add 100g of sodium hydroxide solution with a mass fraction of 40% and 20g of PEG-400 to the system, close the autoclave, react at 160°C for 12h, and then cool down to 90°C;

[0039...

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Abstract

The invention relates to a hindered amine light stabilizer and a preparation method thereof; the hindered amine light stabilizer is synthesized by taking cyanuric chloride, N-butyl 2, 2, 6, 6-tetramethyl- 4-piperidylamine, dimethyl sebacate and alkali as raw materials, and selecting xylene as a reaction solvent; the product is used as a light stabilizer, is suitable for polypropylene, polyethylene, polyurethane and the like, and has excellent light stability; The heat resistance of the product can be improved, and a synergistic effect can be generated with an ultraviolet light absorber and anoxidant to further improve the light stabilization effect of the product.

Description

technical field [0001] The invention belongs to the field of polymer material modification additives, in particular to a hindered amine light stabilizer and a preparation process thereof. Background technique [0002] Light stabilizers are commonly used additives in polymer products such as plastics and coatings. Light stabilizers generally prevent or delay the aging process of polymer products by shielding ultraviolet light or capturing free radicals generated during degradation. The polymer products added with light stabilizer can delay degradation and aging, and significantly prolong the service life of polymer products. [0003] Hindered amine polymer is a light stabilizer widely used at present. The hindered amine light stabilizer achieves the effect of delaying degradation and aging by capturing free radicals generated by polymer products under light. [0004] The existing light stabilizer 770 contains a relatively low proportion of hindered amine groups, and its per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D401/14
CPCC07D401/14
Inventor 苏波李兆亮解振海乔旺胡新利刘旭
Owner 宿迁联盛科技股份有限公司
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