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Hindered amine light stabilizer and preparation method thereof

A technology of hindered amine light stabilizer and light stabilizer, which is applied in the field of new hindered amine light stabilizer and its preparation. Narrow distribution, good compatibility, alkalinity reduction effect

Inactive Publication Date: 2019-03-12
BEIJING TIANGANG AUX CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although these hindered amine light stabilizers have excellent light stability performance, they all have disadvantages such as low average relative molecular weight and high alkalinity.
The biggest disadvantage of low-molecular-weight hindered amine light stabilizers is that they are not resistant to extraction and are easily lost during use; the high alkalinity makes it difficult to compound with acidic additives, and cannot be used in acidic environments such as polyvinyl chloride and coatings.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The preparation of embodiment 1 hindered amine light stabilizer

[0053] Dissolve 18.4g of cyanuric chloride in 300mL of acetone, and after cooling to 0°C, add 21.2g of N-(2,2,6,6-tetramethyl-4-piperidinyl) n-butylamine (trimer The molar ratio of cyanogen chloride to N-(2,2,6,6-tetramethyl-4-piperidinyl) n-butylamine is 1:1) and 13.8gK 2 CO 3 , Stir for 1h, filter, wash the filtrate with water, and concentrate the organic phase to obtain the intermediate.

[0054] Dissolve the intermediate in 100mL chlorobenzene, add 7.88g N,N'-bis[N-(2,2,6,6-tetramethyl-4-piperidinyl)]-1,6-hexanediamine (the molar ratio of intermediate to N,N'-bis[N-(2,2,6,6-tetramethyl-4-piperidinyl)]-1,6-hexanediamine is 1:2), and the reaction After stirring at 30°C for 2h, add 2.76g K 2 CO 3 , then stirred at 50°C for 12h, cooled to room temperature, filtered, the filtrate was washed with water, and the organic phase was concentrated to obtain a polymer.

[0055] Add 150mL bromoethane and 0.9g...

Embodiment 2

[0057] The preparation of embodiment 2 hindered amine light stabilizers

[0058] Dissolve 22.1g of cyanuric chloride in 300mL of dichloromethane, and after cooling to 0°C, add 21.2g of N-(2,2,6,6-tetramethyl-4-piperidinyl) n-butylamine ( The molar ratio of cyanuric chloride to N-(2,2,6,6-tetramethyl-4-piperidinyl) n-butylamine is 1.2:1) and 84g of 10wt% KOH aqueous solution, stirred for 9h, and removed the aqueous phase , The organic phase was concentrated to obtain the intermediate.

[0059] The intermediate was dissolved in 300 mL of toluene, and 9.85 g of N,N'-bis[N-(2,2,6,6-tetramethyl-4-piperidinyl)]-1,6-hexanediamine ( Intermediate and N,N'-bis[N-(2,2,6,6-tetramethyl-4-piperidinyl)]-1,6-hexanediamine molar ratio is 1:2.5), reacted in After stirring at 30°C for 2h, add 1.4g of potassium hydroxide, then stir at 80°C for 9h, cool to room temperature, filter, wash the filtrate with water, and concentrate the organic phase to obtain a polymer.

[0060] Add 150mL diethyl ca...

Embodiment 3

[0062] The preparation of embodiment 3 hindered amine light stabilizers

[0063] Dissolve 18.4g of cyanuric chloride in 400mL of toluene, and after cooling to 0°C, add 21.2g of N-(2,2,6,6-tetramethyl-4-piperidinyl) n-butylamine (trimer The molar ratio of cyanogen chloride to N-(2,2,6,6-tetramethyl-4-piperidinyl) n-butylamine is 1:1) and 7.9 g of pyridine, stirred for 1 h, and the organic phase was concentrated to obtain the intermediate.

[0064] The intermediate was dissolved in 100 mL of toluene, and 7.88 g of N,N'-bis[N-(2,2,6,6-tetramethyl-4-piperidinyl)]-1,6-hexanediamine ( Intermediate and N,N'-bis[N-(2,2,6,6-tetramethyl-4-piperidinyl)]-1,6-hexanediamine molar ratio is 1:2), reacted in After stirring at 30°C for 2h, 1.58g of pyridine was added, then stirred at 50°C for 12h, cooled to room temperature, the reaction solution was washed with water, and the organic phase was concentrated to obtain a polymer.

[0065] Add 150mL bromopropane and 1.9g manganese dioxide to the...

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Abstract

The invention provides a novel hindered amine light stabilizer and a preparation method thereof. The hindered amine light stabilizer has the advantages that the stabilizer is excellent in light stabilization effect, high in molecular weight, resistant to extraction and low in alkalinity, and the light stabilizer and a phenolic antioxidant have good synergistic effects. The preparation method is simple to operate, high in product yield and narrow in molecular weight distribution.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a novel hindered amine light stabilizer and a preparation method thereof. Background technique [0002] With the continuous improvement of the quality of human life and the level of production technology, polymer materials have been widely used in various fields of human social life. However, during the process of processing, storage and use of polymer materials, there is a phenomenon that their physical, chemical and mechanical properties gradually deteriorate. For example, yellowing, embrittlement and cracking of plastics; stickiness, hardening, cracking and degradation of insulation properties of rubber; discoloration, fading, reduction of strength and fracture of fiber products. These phenomena are collectively referred to as aging or degradation of polymer materials. There are many factors that cause the aging of polymer materials, among which the effects of oxyg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06
CPCC08G73/0638C08G73/065
Inventor 安晶晶赵莉
Owner BEIJING TIANGANG AUX CO LTD
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