Antibacterial ultraviolet absorbent as well as preparation method and application thereof in polymer

An absorber and ultraviolet technology, which is applied in the preparation of carboxylic acid amide, chemical instruments and methods, and the preparation of organic compounds, etc., can solve the problems of destruction and aging of synthetic polymer materials, and achieve the effect of easy operation and simple synthesis method

Active Publication Date: 2018-11-16
ZIBO VOCATIONAL INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, although synthetic polymer materials generally have no mold susceptibility, many products are often destroyed by mold due to the addition of plasticizers, stabilizers, lubricants, pigments, fillers and other additives, resulting in high synthetic polymers. Aging of molecular material products

Method used

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  • Antibacterial ultraviolet absorbent as well as preparation method and application thereof in polymer
  • Antibacterial ultraviolet absorbent as well as preparation method and application thereof in polymer
  • Antibacterial ultraviolet absorbent as well as preparation method and application thereof in polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Synthesis of 3,5-di-N-methylbenzamide-2,4-dihydroxybenzophenone in ethanol-concentrated sulfuric acid system:

[0031] Add 21.4g (0.1mol) of 2,4-dihydroxybenzophenone, 20.2g (0.1mol) of N-methylolbenzamide and 100mL of anhydrous Ethanol, heated and stirred in an oil bath at 35°C, and then added dropwise 5mL of concentrated sulfuric acid as a catalyst. After 3 days, the reaction was completed. After cooling to room temperature, the solid-liquid separation was carried out, and the obtained solid was washed repeatedly with distilled water until neutral, and weighed with absolute ethanol. Crystallized, then centrifuged, washed, and dried in a vacuum oven to obtain a white powder, namely 3,5-N-methylbenzamide-2,4-dihydroxybenzophenone. The calculated yield according to Equation 1 was 87%.

[0032] Formula 1

[0033] Wherein, m2 is the mass of the product actually obtained, n1 is the amount of 2,4-dihydroxybenzophenone, and M2 is the molar molecular weight of the ...

Embodiment 2

[0049] Example 2 Synthesis of 3,5-di-N-methylbenzamide-2,4-dihydroxybenzophenone in acetone---aluminum chloride system:

[0050]Add 21.4g (0.1mol) of UV-O, 20.2g (0.1mol) of N-methylolbenzamide and 150mL of acetone into a 250mL three-necked flask equipped with a stirring device, condenser and thermometer, and heat in an oil bath at 35°C Stir, add 6g of anhydrous aluminum trichloride as a catalyst, after 3 days, the reaction ends, after cooling to room temperature, solid-liquid separation is carried out, and the obtained solid is repeatedly washed with distilled water to neutrality, recrystallized with absolute ethanol, centrifuged again, washed, Dry in a vacuum oven to obtain a white powder, namely 3,5-bis-N-methylbenzamide-2,4-dihydroxybenzophenone. The yield calculated according to Equation 1 was 85%. The characterization method of the product is the same as in Example 1.

Embodiment 3

[0051] Example 3 Synthesis of 3,5-di-N-methylbenzamide-2,4-dihydroxybenzophenone in ethanol---strongly acidic ion exchange resin system:

[0052] Add 21.4g (0.1mol) of 2,4-dihydroxybenzophenone, 20.2g (0.1mol) of N-methylolbenzamide and 100ml of anhydrous Ethanol, heated and stirred in an oil bath at 35°C, then added 5g of strong acidic ion exchange resin as a catalyst, the reaction was completed after 3 days, solid-liquid separation was carried out after cooling to room temperature, and the obtained solid was repeatedly washed with distilled water to neutrality, then washed with absolute ethanol Recrystallized, then centrifuged, washed, and dried in a vacuum oven to obtain a white powder, namely 3,5-bis-N-methylbenzamide-2,4-dihydroxybenzophenone. The yield calculated according to Equation 1 was 80%. The characterization method of the product is the same as in Example 1.

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Abstract

The invention relates to an antibacterial ultraviolet absorbent and a synthesis method thereof. The synthesis method comprises the following steps: enabling 2,4-dyhydroxy benzophenone to react with N-hydroxymethyl benzamide through a Friedel-Crafts acylation reaction, carrying out centrifugation and alcohol extraction, thereby obtaining a compound with double functions of antibacterial propertiesand ultraviolet resistance. The novel ultraviolet absorbent provided by the invention is simple and feasible in synthesis method, high in yield, and capable of avoiding the limit of a tedious convention ultraviolet absorbent synthesis process, and can be also used as an antibacterial agent applied to preparation of high-molecular polymers. The antibacterial ultraviolet absorbent provided by the invention has very good application prospects in preparation of high polymer materials.

Description

technical field [0001] The invention belongs to the technical field of ultraviolet absorbers. More specifically, the present invention relates to a bacteriostatic ultraviolet absorber containing a UV-O structure, and also relates to a synthesis method of the ultraviolet absorber and its application in resin synthesis. Background technique [0002] It is well known that sunlight is one of the important factors leading to the aging degradation of polymers. Although the ultraviolet spectral region (290-400mn) contains less than 5% of the sunlight energy, the sunlight in this wavelength range has enough energy to destroy the chemical bonds in organic matter, thus greatly shortening the life span of organic matter, especially polymer materials. service life. At present, the most widely used anti-light aging method is to add anti-aging agents (ultraviolet absorbers, light stabilizers, light quenchers, etc.) to high molecular polymers. Among them, ultraviolet absorber is an auxi...

Claims

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Application Information

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IPC IPC(8): C07C233/78C07C231/12C08F220/18C08F2/44C08K5/20
CPCC07C231/12C07C233/78C08F2/44C08F220/18C08K5/20C08F220/1804
Inventor 单明礼
Owner ZIBO VOCATIONAL INST
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