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High-molecular-weight low-alkalinity light stabilizer as well as preparation and application thereof

A light stabilizer, high molecular weight technology, applied in high molecular weight low alkali light stabilizer and its preparation and application fields, can solve the problems of low alkalinity and high alkalinity, and achieve mild conditions and excellent light stability performance. , the effect of preventing volatilization and migration

Inactive Publication Date: 2020-02-28
SHENYANG RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The first purpose of the present invention is to provide a light stabilizer with high molecular weight and low alkalinity. High usage limited issues

Method used

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  • High-molecular-weight low-alkalinity light stabilizer as well as preparation and application thereof
  • High-molecular-weight low-alkalinity light stabilizer as well as preparation and application thereof
  • High-molecular-weight low-alkalinity light stabilizer as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Add 155g of 2,2,6,6-tetramethylpiperidone, 0.4g of magnesium hydroxide and 1500mL of water to the four-necked flask in sequence, and heat to 65°C. Nitrogen was used to drive oxygen, and 155mL of 30% hydrogen peroxide was added dropwise under the protection of nitrogen, and the drop was completed within 6 hours, and the reaction was continued for 6 hours after the addition was completed. After the reaction, heat an appropriate amount of chloroform for extraction. The extract is washed several times with dilute hydrochloric acid, water and dilute sodium hydroxide, and finally dried with magnesium sulfate. After filtration, the solvent is evaporated to obtain dark red needle-like crystals. Weigh 17g of needle crystals and dissolve in 50.4g of cyclohexane, dissolve 2.68g of copper bromide and 3.87g of tetrabutylammonium bromide in an appropriate amount of water, mix the two, heat to 80°C, and add dropwise 24.0g of 75% The tert-butyl hydroperoxide is added dropwise within ha...

Embodiment 2

[0068] Add 155g of 2,2,6,6-tetramethylpiperidone, 0.4g of magnesium hydroxide and 1500mL of water to the four-necked flask in sequence, and heat to 65°C. Nitrogen was used to drive oxygen, and 155mL of 30% hydrogen peroxide was added dropwise under the protection of nitrogen, and the drop was completed within 6 hours, and the reaction was continued for 6 hours after the addition was completed. After the reaction, heat an appropriate amount of chloroform for extraction. The extract is washed several times with dilute hydrochloric acid, water and dilute sodium hydroxide, and finally dried with magnesium sulfate. After filtration, the solvent is evaporated to obtain dark red needle-like crystals. Weigh 17g of needle crystals and dissolve in 50.4g of cyclohexane, dissolve 2.68g of copper bromide and 3.87g of tetrabutylammonium bromide in an appropriate amount of water, mix the two, heat to 80°C, and add dropwise 24.0g of 75% The tert-butyl hydroperoxide is added dropwise within ha...

Embodiment 3

[0077] Add 155g of 2,2,6,6-tetramethylpiperidone, 0.4g of magnesium hydroxide and 1500mL of water to the four-necked flask in sequence, and heat to 65°C. Nitrogen was used to drive oxygen, and 155mL of 30% hydrogen peroxide was added dropwise under the protection of nitrogen, and the drop was completed within 6 hours, and the reaction was continued for 6 hours after the addition was completed. After the reaction, heat an appropriate amount of chloroform for extraction. The extract is washed several times with dilute hydrochloric acid, water and dilute sodium hydroxide, and finally dried with magnesium sulfate. After filtration, the solvent is evaporated to obtain dark red needle-like crystals. Weigh 17g of needle-like crystals and dissolve in 50.4g of cyclohexane, 3.12g of ferrous sulfate, 5mL of glacial acetic acid and 3.87g of tetrabutylammonium bromide are dissolved in an appropriate amount of water, mix the two, heat to 80°C, and add dropwise 24.0g of 75% tert-butyl hydrop...

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Abstract

The invention belongs to the field of light stabilizers and preparation thereof, and particularly relates to a high-molecular-weight low-alkalinity light stabilizer and preparation and application thereof. The structure of the light stabilizer is shown as a compound I. The light stabilizer has high molecular weight, good extraction resistance, narrow molecular weight distribution and excellent light stability, volatilization and migration in the using process can be effectively prevented, the molecular weight is about 2000-10000, and the molecular weight distribution is below 2.0. The preparation method of the light stabilizer is simple, mild in synthesis condition, easy to operate, high in product yield, free of by-products, clean and environmentally friendly.

Description

technical field [0001] The invention belongs to the field of light stabilizers and their preparation, and in particular relates to a high-molecular-weight low-alkaline light stabilizer and its preparation and application. Background technique [0002] Natural rubber and natural fibers have been collected and used a long time ago, and they can effectively improve people's production and quality of life. With the step-by-step development of science and technology, synthetic materials have brought us a variety of new polymer materials. The use of polymer materials such as plastics, rubber, resins and fibers is becoming more and more extensive. These polymer materials are highly irreplaceable in many fields, and people rely more and more on polymer materials. However, a series of new problems also arise. During their production, transportation, storage and use, yellowing, brittleness, cracking and stickiness are prone to occur, which will lead to material appearance and mechan...

Claims

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Application Information

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IPC IPC(8): C08G73/06C08L79/04C08L23/12
CPCC08G73/0638C08L23/12C08L2201/08C08L79/04Y02P20/52
Inventor 李磊郭林徐开尹永波李向东孙朝辉王新黄月
Owner SHENYANG RES INST OF CHEM IND
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