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Reaction type hindered amine light stabilizer and preparation method thereof

A technology of hindered amine light stabilizer and light stabilizer, which is applied in the direction of organic chemistry, can solve the problem of low product purity, and achieve the effect of simple separation and purification process, mild reaction conditions and high product yield

Inactive Publication Date: 2019-04-26
宿迁联盛科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are relatively few reactive hindered amine light stabilizers on the market, most of which are in the stage of small-scale experiments, and the purity of the products is not high

Method used

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  • Reaction type hindered amine light stabilizer and preparation method thereof
  • Reaction type hindered amine light stabilizer and preparation method thereof
  • Reaction type hindered amine light stabilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In a four-necked flask equipped with a thermometer, add 103g of 1,2,2,6,6-tetramethylpiperidinol, 72g of methyl methacrylate, 1g of p-hydroxyanisole, and 2.0g of sodium methoxide, dissolve in In 300g of petroleum ether solvent, install a condenser, start the agitator, and when the temperature is raised to 100°C, the reaction time is 5h. After the esterification reaction is completed, water washing is carried out to obtain the yield of the target product at 95%.

Embodiment 2

[0030] In a four-necked flask equipped with a thermometer, add 2,2,6,6-tetramethylpiperidinol 157g, ethyl methacrylate 170g, 2,4-dimethyl-6-tert-butylphenol 2g, Dissolve 2.5 g of tetrabutyl titanate in 300 g of xylene solvent, install a condenser, start the stirrer, and raise the temperature to 90° C., and the reaction time is 7 h. After the esterification reaction was completed, the target product was obtained by washing with water, and the yield was 90%.

Embodiment 3

[0032] In a four-necked flask equipped with a thermometer, add 103g of 1,2,2,6,6-pentamethylpiperidinol, 200g of ethyl acrylate, 1g of hydroquinone, 1.5g of tetraisopropyl titanate, and dissolve In 300g of n-heptane solvent, install a condenser, start the stirrer, and when the temperature rises to 115°C, the reaction time is 5h. After the esterification reaction, the target product was obtained by washing with water, and the yield was 96%.

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Abstract

The invention relates to a reaction type hindered amine light stabilizer and a preparation method of the reaction type hindered amine light stabilizer. The light stabilizer is prepared by dissolving tetramethyl-4-piperidinol and a derivative of the tetramethyl-4-piperidinol into a solvent, adding a polymerization inhibitor and alpha-beta unsaturated carboxylic ester, implementing an esterificationreaction under the action of a catalyst, washing with water, and desolventizing. According to the disclosed reaction type hindered amine light stabilizer and the preparation method of the reaction type hindered amine light stabilizer, the process is simple, the condition is mild, the purity of a produced product is high, and the yield is more than 90%. The synthesis method is simple to operate, the color of the product is light, and the light transmittance of the product is good.

Description

technical field [0001] The invention relates to a reactive hindered amine light stabilizer and a preparation method thereof, belonging to the field of light stabilizer synthesis. Background technique [0002] Hindered amine light stabilizers (HALS) have unique and excellent light protection properties, so they have attracted extensive attention from domestic and foreign industries. The hindered amine light stabilizer is a piperidine derivative with a steric hindrance effect, which contains an alkyl or alkoxy group, which is connected to a hindered piperidinyl auxiliary group. Since there are many different types of auxiliary groups and substituents, their varieties are diversified. For example, functionalized hindered amines are bonded to hindered amine light stabilizers with functional groups such as ultraviolet absorption, thermal oxidation resistance, and peroxide decomposition, so that one agent can be used for multiple purposes. Low-basic hindered amines solve the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D211/44
CPCC07D211/44
Inventor 俞秀丽袁开锋胡新利
Owner 宿迁联盛科技股份有限公司
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