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Synthesis method of reactive hindered phenol oxidation-resistant polyolefin additive and application thereof

A synthesis method and technology of olefin auxiliary agent are applied in the synthesis field of reactive hindered phenol antioxidant polyolefin auxiliary agent, which can solve the problems of poor compatibility of polyolefin polymer, inability of large molecular weight antioxidant to migrate in time, Unfavorable problems such as wide application in industrial production, to achieve long-lasting antioxidant effect, high yield, and non-volatile effects

Inactive Publication Date: 2017-05-10
GUANGZHOU JET BIOFILTRATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, although the hindered phenol antioxidant with large molecular weight has the advantages of low volatility, extraction resistance, higher temperature resistance, less pollution, and good thermal stability, it also has certain disadvantages. On the one hand, the preparation process is relatively Complicated, the final cost is high, and it is difficult to promote and use on a large scale
On the other hand, when the antioxidants acting on the surface of the product are exhausted, the internal large molecular weight antioxidants may not even migrate to the surface in time to exert their effectiveness
Although the other compound type has good anti-oxidation effect, it also has disadvantages such as poor compatibility with polyolefin polymers, complex synthetic structure, high cost, and complicated process, which is not conducive to the wide application of industrial production.

Method used

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  • Synthesis method of reactive hindered phenol oxidation-resistant polyolefin additive and application thereof
  • Synthesis method of reactive hindered phenol oxidation-resistant polyolefin additive and application thereof
  • Synthesis method of reactive hindered phenol oxidation-resistant polyolefin additive and application thereof

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Experimental program
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Effect test

Embodiment 1

[0025] In this embodiment, a synthetic method of a reactive hindered phenol antioxidant polyolefin additive comprises the following steps:

[0026] 1. Take 100 ml of analytically pure acetone, add 5 mol of anhydrous potassium hydroxide and 5 mol of 2,4 dihydroxybenzophenone, keep stirring at room temperature for 4 hours to carry out the reaction, and then keep the temperature at 40°C.

[0027] 2. Slowly drop 5 mol of allyl bromide in acetone solution into the above solution (dropping time is 30 minutes), and continue to react at 40° C. for 2 hours after the dropping is completed.

[0028] 3. Cool the reaction solution to room temperature, filter to remove impurities, and distill under reduced pressure to obtain a crude product. Finally, a solid (2-hydroxy-4-allyloxy-benzophenone) was obtained after recrystallization with 50% ethanol aqueous solution.

[0029] 4. The purity of the solid was 94% as detected by GC, and the yield was 86%. The solvent in the filtrate can be disti...

Embodiment 2

[0031] In this embodiment, a synthetic method of a reactive hindered phenol antioxidant polyolefin additive comprises the following steps:

[0032] 1. Take 100 ml of analytically pure acetone, add 5 mol of anhydrous potassium hydroxide and 5 mol of 2,4 dihydroxybenzophenone, keep stirring at room temperature for 4 hours to carry out the reaction, and then keep the temperature at 40°C.

[0033] 2. Slowly drop 5 mol of allyl bromide in acetone solution into the above solution, and continue to react at 40°C for 6 hours after the drop is completed.

[0034] 3. Cool the reaction solution to room temperature, filter to remove impurities, and distill under reduced pressure to obtain a crude product. Finally, a solid (2-hydroxy-4-allyloxy-benzophenone) was obtained after recrystallization with 50% ethanol aqueous solution.

[0035] 4. The purity of the solid is 97% as detected by GC, and the yield is 97%. The solvent in the filtrate can be distilled and reused.

Embodiment 3

[0037] In this embodiment, a synthetic method of a reactive hindered phenol antioxidant polyolefin additive comprises the following steps:

[0038] 1. Take 100 ml of analytically pure acetone, add 5 mol of anhydrous potassium hydroxide and 5 mol of 2,4 dihydroxybenzophenone, keep stirring at room temperature for 4 hours to carry out the reaction, and then keep the temperature at 50°C.

[0039] 2. Slowly drop 5 mol of allyl bromide in acetone solution into the above solution, and continue to react at 50°C for 6 hours after the drop is completed.

[0040] 3. Cool the reaction solution to room temperature, filter to remove impurities, and distill under reduced pressure to obtain a crude product. Finally, a solid (2-hydroxy-4-allyloxy-benzophenone) was obtained after recrystallization with 50% ethanol aqueous solution.

[0041] 4. The purity of the solid was 97% as detected by GC, and the yield was 93%. The solvent in the filtrate can be distilled and reused.

[0042] The react...

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Abstract

The invention relates to a synthesis method of a reactive hindered phenol oxidation-resistant polyolefin additive and application thereof. The synthesis method comprises the following steps that a catalyst and 2,4 dyhydroxyl diphenylketone are dissolved in a solvent according to the molar ratio to 1-1.2 to 1, stirring reaction is performed at the temperature of 40-60 DEG C for 2-8 hours, then allyl halide is slowly and dropwise added, constant temperature reaction is performed at the temperature of 40-60 DEG C for 2-6 hours, standing and crystallization are performed, and a product is filtered to obtain the reactive hindered phenol oxidation-resistant polyolefin additive. The reactive hindered phenol oxidation-resistant polyolefin additive is applied to a polyolefin composite material, can improve the compatibility between the additive and polyolefin resin, has the advantages of extraction resistance, difficult migration, difficult volatilization and no environmental pollution, can keep a lasting oxidation-resistant effect, can capture peroxy radicals and can also capture alkyl free radicals, can play the oxidation-resistant effect simultaneously in the surface and interior of a polymer and is high in oxidation-resistant efficiency.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a synthesis method and application of a reactive hindered phenol antioxidant polyolefin additive. Background technique [0002] Polyolefin polymers, especially polypropylene and polyvinyl chloride, are widely used as the main raw materials for medical supplies because of their high strength, high hardness, wear resistance, chemical corrosion resistance, easy processing, and low price. However, medical plastics have higher requirements than ordinary plastics, and they usually have to be sterilized and irradiated. At this time, ordinary polyolefins are easily oxidized and deteriorate in performance, resulting in yellowing in color. As the storage time increases, the aging phenomenon is aggravated, and these defects will obviously be subject to certain application restrictions. [0003] The oxidation of polyolefins is generally considered to be an autoxidation reaction pr...

Claims

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Application Information

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IPC IPC(8): C08L23/00C08L23/12C08L51/06C08F255/02C08F216/14C08F226/06C07C45/61C07C49/83C07C45/64C07C49/84
CPCC07C45/61C07C45/64C08F216/14C08F255/02C08L23/00C08L23/12C08L2201/08C08F216/1416C08F226/06C08L51/06C07C49/83C07C49/84
Inventor 唐慧陈勇李慧伦方想元袁建华余劲翔陈旭东
Owner GUANGZHOU JET BIOFILTRATION CO LTD
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