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A kind of light stabilizer and preparation method thereof

A light stabilizer and solvent technology, applied in the field of light stabilizer and preparation, can solve the problems of small molecular weight, affecting the service life of materials, easy migration and extraction, etc., so as to improve the extraction resistance, prolong the service life, improve the Effects of material compatibility and dispersion

Active Publication Date: 2021-12-31
ZHENXING FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At the same time, the molecular weight of the hindered amine light stabilizer is also an important factor affecting its performance. Due to the small molecular weight of the traditional hindered amine light stabilizer, it is prone to migration, extraction and other losses in the material, which greatly affects the material. service life

Method used

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  • A kind of light stabilizer and preparation method thereof
  • A kind of light stabilizer and preparation method thereof
  • A kind of light stabilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of ethyl 2-((4-hydroxy-2,2,6,6-6-tetramethyl-1-piperidinyl)oxy)acetate, compound (II)

[0027] Take a dry 500ml three-necked round-bottom flask, install a thermometer on the left, install a condensing reflux device in the middle, and install a constant-pressure dropping funnel on the right, add ZJ-701 and ethyl acetoacetate (the ratio of material to feed is 1:1.2), After stirring and dissolving 20ml of ethanol at room temperature, add copper acetate (5mol%), slowly drop 1.5 equivalents of 30% hydrogen peroxide aqueous solution, after the dropwise addition, heat the oil bath to 40°C, and react for 22h. After the reaction, wash with vitamin C aqueous solution, then wash with 1N HCl aqueous solution, saturated brine, saturated sodium carbonate aqueous solution, dry, and concentrate to obtain compound 2-((4-hydroxyl-2,2,6, 6-6-Tetramethyl-1-piperidinyl)oxy)ethyl acetate.

[0028] Preparation of 1-(2-hydroxyethoxy)-2,2,6,6-tetramethylpiperidin-4-ol, compound (Ⅳ)...

Embodiment 2

[0033] Preparation of ethyl 2-((4-hydroxy-2,2,6,6-6-tetramethyl-1-piperidinyl)oxy)acetate, compound (II)

[0034] Take a dry 500ml three-necked round-bottom flask, install a thermometer on the left side, install a condensing reflux device in the middle, and install a constant pressure dropping funnel on the right side, add ZJ-701 and ethyl acetoacetate (the ratio of material to feed is 1:1.5), After stirring and dissolving 20ml of ethanol at room temperature, add copper acetate (5mol%), slowly drop 1.5 equivalents of 30% hydrogen peroxide aqueous solution, after the dropwise addition, heat the oil bath to 65°C, and react for 8h. After the reaction, wash with aqueous vitamin C solution, then wash with 1N aqueous HCl, wash with saturated brine, wash with saturated aqueous sodium carbonate, dry, and concentrate to obtain compound 2-((4-hydroxy-2,2,6, 6-6-Tetramethyl-1-piperidinyl)oxy)ethyl acetate.

[0035] Preparation of 1-(2-hydroxyethoxy)-2,2,6,6-tetramethylpiperidin-4-ol, co...

Embodiment 3

[0040] Preparation of ethyl 2-((4-hydroxy-2,2,6,6-6-tetramethyl-1-piperidinyl)oxy)acetate, compound (II)

[0041]Take a dry 500ml three-necked round-bottomed flask, install a thermometer on the left side, install a condensing reflux device in the middle, and install a constant pressure dropping funnel on the right side, add ZJ-701, ethyl acetoacetate (the ratio of material to feed is 1:1), Toluene 20ml, stir and dissolve at room temperature, add copper acetate (5mol%), slowly drop 2 equivalents of 30% tert-butyl hydroperoxide aqueous solution, after the dropwise addition, heat the oil bath to 50°C, and react for 15h. After the reaction, wash with vitamin C aqueous solution, then wash with 1N HCl aqueous solution, saturated brine, saturated sodium carbonate aqueous solution, dry, and concentrate to obtain compound 2-((4-hydroxyl-2,2,6, 6-6-Tetramethyl-1-piperidinyl)oxy)ethyl acetate.

[0042] Preparation of 1-(2-hydroxyethoxy)-2,2,6,6-tetramethylpiperidin-4-ol, compound (Ⅳ)

...

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Abstract

The invention provides a light stabilizer and a preparation method, and specifically relates to the field of light stabilizers. Its structure is as follows: wherein n is 1-10. The light stabilizer produced by the invention has better light stability and can improve the material compatibility and dispersibility of the light stabilizer. It can effectively prolong the service life in acidic environment. The new polymeric hindered amine molecular structure is beneficial to improve the extraction resistance. Compared with the N-alkyl substitution structure, the new hindered amine light stabilizer has better flame retardant properties.

Description

technical field [0001] The invention belongs to the field of light stabilizers, and in particular relates to a light stabilizer and a preparation method. Background technique [0002] The hindered amine light stabilizer has been favored by the market due to its excellent performance in the development of nearly half a century. In the domestic market, the proportion of hindered amine light stabilizers is as high as 80%. The development of hindered amine light stabilizers also presents the characteristics of high molecular weight, low alkalinity, and multifunctionality. [0003] Related work has shown that the alkylation, alkoxylation and acylation of piperidine amino groups can effectively reduce the alkalinity of hindered amine light stabilizers, improve the stability in acidic materials and acidic working environments, and can Improve the service life of polymer materials and delay the aging of materials. Among them, the alkylation of piperidine amino is the most basic, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/3435C07D211/94
CPCC08K5/3435C07D211/94
Inventor 潘行平张晓静柯友斌李军葛一刘周衡刘石
Owner ZHENXING FINE CHEM CO LTD
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