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A hindered amine light stabilizer intermediate and its preparation method and application

A technology of hindered amine light stabilizer and intermediate, which is applied in the field of hindered amine light stabilizer intermediate and its preparation, can solve the problems of poor compatibility and poor synergistic effect, and achieves improved photostability and simple and easy reaction method. Controlled, high-yield effects

Active Publication Date: 2022-03-25
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

However, this multi-component antioxidant system has many disadvantages during use, such as poor compatibility, poor synergistic effect, etc.

Method used

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  • A hindered amine light stabilizer intermediate and its preparation method and application
  • A hindered amine light stabilizer intermediate and its preparation method and application
  • A hindered amine light stabilizer intermediate and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A preparation method of a hindered amine light stabilizer intermediate, comprising the steps of:

[0039] Add 155g of triacetone amine, 81g of dimethylamine, 400g of xylene and 120g of formic acid in a 2L reactor, under the protection of nitrogen, start stirring and heat up to 130-135°C. After 6 hours, the sampling test is qualified, and the The reaction solution was down to room temperature, washed with aqueous sodium hydroxide solution (30%, wt.) and deionized water to weak alkalinity successively, and distilled under negative pressure to obtain the compound shown in the intermediate formula II (wherein, R is a methyl group), and the yield was 97.5%.

[0040] Put 179.44g of the compound represented by the intermediate formula II obtained above into a 2L reaction kettle, and add 126g of dimethyl malonate, 200g of xylene and 10g of lithium amide into the kettle, start stirring and raise the temperature to 130-135°C, After 4 hours, the sampling test was qualified, quenc...

Embodiment 2

[0044] A preparation method of a hindered amine light stabilizer intermediate, comprising the steps of:

[0045]Add 155g of triacetoneamine, 68g of dimethylamine, 110g of formic acid and 330g of xylene in a 2L reaction kettle, and start stirring and warming up to 130-135°C under nitrogen protection. After 5 hours, the sampling test is qualified, and the The reaction solution was down to room temperature, washed with aqueous sodium hydroxide solution (30%, wt.) and deionized water to weak alkalinity successively, and distilled under negative pressure to obtain the compound shown in the intermediate formula II (wherein, R is a methyl group), and the yield was 98.3%.

[0046] Put 180.87g of the compound represented by the intermediate formula II obtained above into a 2L reaction kettle, and add 131g of dimethyl malonate, 300g of xylene and 10g of lithium amide into the kettle, start stirring and raise the temperature to 130-135°C, After 5 hours, the sample was tested to be quali...

Embodiment 3

[0048] A preparation method of a hindered amine light stabilizer intermediate, comprising the steps of:

[0049] Add 155g of triacetone amine, 50g of dimethylamine and 320g of toluene into a 2L reactor, under the protection of nitrogen, start to stir and preheat to 105°C, then add 115g of formic acid, the reaction temperature rises to 105-110°C, 7 Hours later, the sampling test was qualified, and the reaction solution was down to room temperature, washed with aqueous sodium hydroxide solution (30%, wt.) and deionized water to weak alkalinity successively, and negative pressure distillation obtained the compound shown in the intermediate formula II (wherein, R is methyl), the yield is 96.7%.

[0050] Put 177.93g of the compound represented by the intermediate formula II obtained above into a 2L reaction kettle, and add 140g of dimethyl malonate, 300g of toluene and 11g of lithium amide into the kettle, start stirring and raise the temperature to 105-110°C, 8 Hours later, the s...

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Abstract

The invention discloses a hindered amine light stabilizer intermediate, whose structural formula is shown in the following formula I: wherein, the R is a C1-C4 alkyl group. The light stabilizer intermediate disclosed by the invention can be used for synthesizing polyester fibers, and the light stability of the fibers is increased or improved by supplementing hindered amine functional groups outside the main chain. The invention also discloses the preparation method and application of the light stabilizer intermediate.

Description

technical field [0001] The present invention relates to the field of light stabilizers. More specifically, it relates to a hindered amine light stabilizer intermediate and its preparation method and application. Background technique [0002] With the improvement of the production level of polymer materials and the increasing market demand, polymer materials will be affected by light, heat, metal ions and other external influences during use, making them discolored, hardened, brittle and sticky Aging phenomena such as cracks and cracks will reduce the mechanical and mechanical properties of polymer materials and eventually lose their use value. In order to overcome the above problems, prolong the service life of polymer materials and improve the use value, people will add hindered amine light stabilizers in the process of processing and using polymer materials to inhibit or slow down the aging or degradation of polymer materials, increase Its weather resistance and other su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D211/34C07D211/46C09D175/04C09D7/48
CPCC07D211/34C07D211/46C09D175/04C09D7/48C08K5/3435
Inventor 蔡红云祝君威韩炎江赛梁小龙
Owner 宿迁联盛科技股份有限公司
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