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Novel hindered amine light stabilizer preparation method

A hindered amine light stabilizer, a new type of technology, applied in the direction of rayon manufacturing, single-component polyolefin rayon, fiber chemical characteristics, etc., can solve the problem of heavy taste, achieve good compatibility, processing performance and anti-corrosion Excellent aging effect and fewer steps for product synthesis

Pending Publication Date: 2019-10-22
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

In addition, many friends will add a certain proportion of recycled materials to the new materials, and the taste will be heavier during granulation production. This is a common problem in production.

Method used

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  • Novel hindered amine light stabilizer preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 300g of toluene as a solvent, 76.08g of vanillin, 45.22g of sodium chlorite in a 1000ml four-neck bottle assembled with a condenser, a water separator, a foam blower, a return pipe, a thermometer and an agitator, and open Stir and react at 120°C for 2h. After cooling down to 30°C, add 32.04g of methanol, start stirring, react at 100°C for 2 hours, add 78.63g of tetramethylpiperidinol, raise the temperature to 140°C and continue stirring for 3 hours, then wash with water, decolorize, filter, cool and crystallize to obtain the target Product 136.3g.

[0029] Product evaluation experiment:

[0030] Maximum breaking force before aging (N) Maximum breaking force after aging (N) Fracture Maximum Force Retention % 3‰783 69 43 62.3 3‰ target product 72 51 70.8

Embodiment 2

[0032] Add 400g of toluene as solvent, 152.15g of vanillin, 90.44g of sodium chlorite in a 1000ml four-necked bottle assembled with condenser, water separator, foamer, return pipe, thermometer and stirrer, and open Stir and react at 100°C for 1h. After cooling down to 30°C, add 64.08g of methanol, start stirring, react at 80°C for 1 hour, add 157.25g of tetramethylpiperidinol, raise the temperature to 120°C and continue stirring for 5 hours, then wash with water, decolorize, filter, and cool to crystallize to obtain the target Product 271.2g.

[0033] Product evaluation experiment:

[0034] Maximum breaking force before aging (N) Maximum breaking force after aging (N) Fracture Maximum Force Retention % 3‰783 71 45 63.4 3‰ target product 73 54 73.9

Embodiment 3

[0036] Add 800g of toluene as solvent, 304.3g of vanillin, 180.88g of sodium chlorite in a 2000ml four-necked bottle assembled with condenser, water separator, foamer, return pipe, thermometer and stirrer, and open Stir and react at 60°C for 0.5h. After cooling down to 30°C, add 128.16g of methanol, start stirring, react at 60°C for 0.5h, add 314.5g of tetramethylpiperidinol, raise the temperature to 100°C and continue stirring for 1h, then wash with water, decolorize, filter, and cool to crystallize to obtain Target product 518.9g.

[0037] Product evaluation experiment:

[0038] Maximum breaking force before aging (N) Maximum breaking force after aging (N) Fracture Maximum Force Retention % 3‰783 69 43 62.3 3‰ target product 73 51 69.9

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Abstract

The invention relates to a novel hindered amine light stabilizer preparation method, which specifically comprises: (1) dissolving vanillin in a solvent, adding sodium chlorite, and performing an oxidation reaction to form a carboxyl group-containing compound; (2) adding methanol to the carboxyl group-containing compound, and performing an esterification reaction to obtain an ester compound; and (3) mixing the generated ester compound and tetramethylpiperidinol, adding a catalyst, and performing a reaction to obtain the hindered amine light stabilizer. According to the present invention, the synthetic raw material vanillin of the hindered amine light stabilizer is easy to obtain and non-toxic, the product synthesis steps are less, and the reaction conditions are mild; and the light stabilizer has good compatibility with polymers, especially engineering plastics, and further has excellent processing performance and excellent anti-aging effect.

Description

technical field [0001] The invention belongs to the field of polymer material additives, and in particular relates to a preparation method of a novel hindered amine light stabilizer. Background technique [0002] Aging refers to the phenomenon that the performance of plastics gradually deteriorates due to the comprehensive effect of internal and external factors during processing, storage and use, so that they finally lose their use value. Aging is an irreversible change that is common to materials. Common aging tests mainly include light aging, damp heat aging, hot air aging, high and low temperature test, salt spray corrosion, ozone aging, thermal oxygen aging test, buried soil corrosion test, liquid medium aging test, user-specific condition aging test, etc. [0003] Plastic products emit unpleasant odors during processing. To overcome this problem, efforts have been made to reduce these odors for a long time. In addition, many friends will add a certain proportion of r...

Claims

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Application Information

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IPC IPC(8): C07D211/46C08K5/3435C08L23/12D01F6/46D01F1/10
CPCC07D211/46C08K5/3435D01F6/46D01F1/10C08L2201/08C08L23/12
Inventor 张强谢胜利项瞻峰刘旭
Owner 宿迁联盛科技股份有限公司
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