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Reactive type light stabilizer and preparation method thereof

A light stabilizer and reactive technology, applied in the field of reactive light stabilizers and their preparation, can solve the problems of high toxicity, easy self-polymerization, etc., to avoid self-polymerization, good light stabilization effect, and small steric hindrance Effect

Inactive Publication Date: 2017-08-08
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

[0004] The invention solves the technical problems of reactive light stabilizers in the prior art that are prone to self-polymerization and high toxicity.

Method used

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  • Reactive type light stabilizer and preparation method thereof
  • Reactive type light stabilizer and preparation method thereof
  • Reactive type light stabilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Reactants: ethyl cinnamate and tetramethylpiperidinol;

[0028] Catalyst: sodium methoxide;

[0029] Organic solvent: n-heptane;

[0030] The substance molar ratio of ethyl cinnamate and tetramethylpiperidinol is 1:1;

[0031] The mass ratio of catalyst and ethyl cinnamate is 0.003:1;

[0032] The mass ratio of organic solvent and ethyl cinnamate is 1:1;

[0033] Put the reactant and organic solvent into the reaction kettle and reflux water separation at 100°C; after the reflux water separation is completed, put in the catalyst and heat the reaction. End (GC monitoring reaction);

[0034] Wash, separate, decolorize, and filter the reacted material; then distill off the organic solvent under reduced pressure to obtain 275 g of hindered amine light stabilizer with a content (GC) of 99.5% and a yield of 95.8%.

Embodiment 2

[0036] Reactants: propyl cinnamate and pentamethylpiperidinol;

[0037] Catalyst: aluminum ethylate;

[0038] Organic solvent: toluene;

[0039] The substance ratio of propyl cinnamate and pentamethylpiperidinol is 1:1.5;

[0040] The mass ratio of catalyst and propyl cinnamate is 0.5:1;

[0041] The mass ratio of organic solvent and propyl cinnamate is 10:1;

[0042] Put the reactant and organic solvent into the reaction kettle and reflux water separation at 100°C; after the reflux water separation is completed, put in the catalyst, heat the reaction, the reaction temperature is 140°C, continue to flow out to bring out the propanol, and at the same time properly replenish the solvent until Reaction ends (GC monitors reaction);

[0043] Wash, separate, decolorize, and filter the reacted material; then distill off the organic solvent under reduced pressure to obtain 286 g of hindered amine light stabilizer with a content (GC) of 99.2% and a yield of 95%.

Embodiment 3

[0045] Reactants: methyl cinnamate and tetramethylpiperidinol;

[0046] Catalyst: tetrabutyl titanate;

[0047] Organic solvent: petroleum ether (boiling range: 90-120°C);

[0048] The molar ratio of methyl cinnamate and tetramethylpiperidinol is 1:1.05;

[0049] The mass ratio of catalyst and methyl cinnamate is 0.01:1;

[0050] The mass ratio of organic solvent to methyl cinnamate is 1:1;

[0051] Put the reactant and organic solvent into the reaction kettle and reflux water separation at 100°C; after the reflux water separation is completed, put in the catalyst, heat the reaction, the reaction temperature is 130°C, continue to reflux to separate methanol until the end of the reaction (GC monitors the reaction) ;

[0052] Wash, separate, decolorize, and filter the reacted material; then distill off the organic solvent under reduced pressure to obtain 273 g of hindered amine light stabilizer with a content (GC) of 99.1% and a yield of 95.1%.

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Abstract

The invention belongs to the field of modified additives for polymer materials, in particular to a reactive light stabilizer and a preparation method thereof; for the first time, cinnamate is used as a reactive group to react with hindered amines to synthesize a reactive light stabilizer, stabilizer The benzene ring and the double bond in the cinnamic acid molecule in the light stabilizer form a delocalized π bond, and the benzene ring and the carboxyl group have a suitable space Steric hindrance, which can not only avoid the self-polymerization of the light stabilizer itself, but also ensure the smooth grafting to the polymer main chain; during the synthesis reaction, no polymerization inhibitor is needed, which improves the purity of the product and the difficulty of post-processing ; The raw material cinnamate of the present invention has a wide range of sources, not only can be extracted from plants, but also can be synthesized by chemical methods, safe and environmentally friendly, low in price, and can be widely used in industrial production.

Description

technical field [0001] The invention belongs to the field of polymer material modification aids, in particular to a reactive light stabilizer and a preparation method thereof. Background technique [0002] Light stabilizers are indispensable additives for outdoor polymer materials. Light stabilizers with small molecular weight have poor resistance to migration, volatilization and extraction. The conventional method is to increase the molecular weight of light stabilizers, such as polymeric light stabilizer 944 and polymeric light stabilizer 622, which have achieved great success. Another method is to bond the hindered amine piperidine to the main chain of the polymer, which is the reactive light stabilizer. [0003] Reactive light stabilizer refers to the introduction of reactive groups into the molecular structure of hindered amines, so that they can be bonded or grafted to the main chain of polymers during the processing of polymer products to form permanent light stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/3435C08L23/06C07D211/46
CPCC08K5/3435C07D211/46C08L23/06
Inventor 项瞻波项瞻峰谢胜利胡新利王晶
Owner 宿迁联盛科技股份有限公司
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