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A light stabilizer intermediate and preparation method thereof

A technology for light stabilizers and intermediates, applied in the field of light stabilizer intermediates and their preparation, can solve the problems of small molecular weight, poor compatibility of polymer materials, intolerant of extraction, etc., and achieves low volatility, superior high Molecular compatibility and good compatibility

Active Publication Date: 2021-07-27
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

However, the molecular weight of the existing hindered amine light stabilizers is generally small, the compatibility with polymer materials is not good, and they are not resistant to extraction. Therefore, research on high molecular weight hindered amine light stabilizers is the leading trend in the light stabilizer market.

Method used

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  • A light stabilizer intermediate and preparation method thereof
  • A light stabilizer intermediate and preparation method thereof
  • A light stabilizer intermediate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 50 g of bromine styrene was added to the reactor, 100 g xylene and 0.25 g of phenol were added, and the stirring was opened to mix uniform, and the temperature was 50-53 ° C. Add 43.5 g of 4-amino-2, 2, 6, 6-tetramethylpiperidine, after the dropping temperature temperature 55-58 ° C dropped 37 g 30% of the base liquid, after the filtration of 85-88 ° C for 4 hours, water washing, steam removal of the solvent 3, 2 6,6-tetramethyl-N- (4-vinylphenyl) piperidine-4-amine 75.2 g, yield is 91.0%;

Embodiment 2

[0025] A method of preparing a light stabilizer intermediate, comprising the steps of:

[0026] 100 g of bromine styrene was added to the reactor, 250 g x xylene and 0.55 g of phenol were added, and the stirring was opened, and the temperature was mixed, and 92.5 g of 4-60 ° C was added dropwise. 92.5 g 4-amino-2, 2, 6, 6-tetramethylpiperidine, post-finishing temperature at 62-65 ° C, add 80.5 g 30% of the base liquid, after the finishing is 90-93 ° C for 5 hours, washed, steamed removal of the solvent 3, 2,6,6-tetramethyl-N- (4-vinylphenyl) piperidine-4-amine 152.6 g, yield is 92.3%;

Embodiment 3

[0028] A method of preparing a light stabilizer intermediate, comprising the steps of:

[0029] 156 g of bromine styrene was added to the reactor, 624 g x xylene and 0.92 g of phenol were added, and the stirring was mixed, and the temperature was mixed, and the temperature was 60-63 ° C. 144G4-amino-2, 2, 6, 6 - Tetarmethylpiperidine, after the end of the drop, the temperature was added dropwise to 135 g 30% of the alkali solution, and the incubation was 5.5 hours after the filtration of 98-100 ° C for 5.5 hours, washed, steamed removal of the solvent 3, 2, 6,6-tetramethyl-N- (4-vinylphenyl) piperidine-4-amine 233.7 g, yield is 90.6%;

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Abstract

The invention belongs to the technical field of plastic additives, and in particular relates to a light stabilizer intermediate and a preparation method thereof, which uses 4-amino-2,2,6,6-tetramethylpiperidine and p-bromostyrene as raw materials. Under the effect of acid-binding agent and polymerization inhibitor, synthetic light stabilizer intermediate 2,2,6,6-tetramethyl-N-(4-vinylphenyl) piperidine-4-amine, the light stabilizer The intermediate is an important direct raw material for high molecular weight polymeric light stabilizers. It can synthesize graft polymeric light stabilizers with different molecular weights, which can inhibit or slow down the degradation of polymer materials due to photooxidation, and has excellent thermal stability. , low volatility, good compatibility with polymer materials, etc.; the synthesis process of the invention is simple, the preparation cost is low and the yield is high.

Description

Technical field [0001] The present invention is a plastic aid technology, and more particularly to a light stabilizer intermediate and a preparation method thereof. Background technique [0002] The light stabilizer is an additive of a polymer article that shields or absorbs the energy of ultraviolet rays, quenching single-line oxygen and decomposes hydrogen peroxide into an inactive substance, so that the polymer polymer is radiated under light. It can eliminate or slow the possibility of photochemical reaction, prevent or delay the aging agentia, thereby achieving the purpose of extending the life of high molecular polymer products. [0003] The protruding amine is a class of space-impeded organic amine compounds that have a good inhibitory effect on the photobacter-degradation reaction of the highlier and organic compounds, and is a kind of optometric light stabilizer. However, the existing hindered amine photomechanical molecular weight is generally small, and the compatibili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D211/58C08F112/14
CPCC07D211/58C08F112/28
Inventor 梁小龙祝君威范定孟解振海张超
Owner 宿迁联盛科技股份有限公司