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Aldehyde-removing coating additive and preparation method thereof

A technology for additives and coatings, applied in the field of aldehyde-removing coating additives and their preparation, can solve the problems of limited application of titanium oxide and low efficiency, and achieve the effects of unique redox effect, good absorption and good photosensitivity

Inactive Publication Date: 2020-12-18
深圳世界美生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the application of aldehyde removal in coatings, the photodegradable materials based on titanium oxide can only have high efficiency under ultraviolet light, and the efficiency is low under visible light, which severely limits the application of titanium oxide.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of the aldehyde-removing paint additive provided by the invention comprises the following steps:

[0026] S1: Use pasty chlorophyll as a raw material, add ether to dissolve to obtain a solution, place the solution in an ice bath, add concentrated hydrochloric acid during the ice bath, and ice bath for 3 hours, then filter to obtain the filtrate, dilute the filtrate with distilled water, then ice bath, and add alkali Neutralize with neutralized sodium hydroxide solution until the pH value is about 4-5. During the neutralization process, precipitation occurs. Filter the neutralized solution to obtain a filter cake, wash the filter cake with distilled water, and then vacuum-dry to obtain pheophorbide a Crude;

[0027] S2: Use the crude pheophorbide a prepared in S1 as raw material, add methanol solution and dilute sulfuric acid to dissolve, stir and react at room temperature for 12 hours, extract with dichloromethane after the reaction, wash with wat...

Embodiment 2

[0032] The preparation method of the aldehyde-removing paint additive provided by the invention comprises the following steps:

[0033] S1: Take pasty chlorophyll as a raw material, weigh 5 parts by weight, add to 30 parts by weight of cold ether to dissolve to obtain a solution, then ice-bath the solution, keep it at 0 degrees Celsius, and add a mass concentration of 37% while stirring in the ice-bath process. 50 parts of concentrated hydrochloric acid of %, stirred in ice bath for 3 hours, then took out and left standstill for 1 hour, the standing solution was suction-filtered with a Buchner funnel to obtain the filtrate, and the filtrate was diluted by adding 50 parts by weight of distilled water, and then the diluted filtrate Carry out an ice bath at 0 degrees Celsius, and add 10mol / L sodium hydroxide solution to neutralize while stirring until the pH value is about 4-5. Precipitation occurs during the neutralization process, and the neutralized dilution is filtered here. ...

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PUM

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Abstract

The invention belongs to the technical field of building coating additives, and particularly relates to an aldehyde-removing coating additive and a preparation method thereof. The aldehyde-removing coating additive comprises protopyropheophorbide a methyl ester manganese; the preparation method comprises the following steps: adding pasty chlorophyll into diethyl ether to be dissolved, then addingconcentrated hydrochloric acid into an ice bath, and performing neutralization to obtain pheophorbide a; adding a methanol solution and dilute sulfuric acid into the pheophorbide a for dissolving, extracting the solution to separate out an organic phase, concentrating the extract to dryness to obtain pheophorbide a methyl ester, adding glacial acetic acid into the pheophorbide a methyl ester, carrying out reflux extraction, concentrating an organic liquid to dryness to obtain pyropheophorbide a methyl ester, preparing zinc pyropheophorbide a methyl ester, and preparing orthopyropheophorbide amethyl ester; and dissolving the orthopyropheophorbide a methyl ester in absolute ethyl alcohol, adding manganese chloride, and carrying out reflux reaction to obtain the protopyropheophorbide a methyl ester manganese. The formaldehyde-removing coating additive provided by the invention has good absorption to visible light and a wide spectral response range, and does not need to additionally arrange a light source.

Description

technical field [0001] The invention belongs to the technical field of architectural paint additives, and in particular relates to an aldehyde-removing paint additive and a preparation method thereof. Background technique [0002] Due to the use of various insecticides, detergents, cosmetics, paints, wood products and the application of urea-formaldehyde resin foam insulation boards and coatings in modern buildings, the content of formaldehyde in the room is getting higher and higher. Concentration of formaldehyde in outdoor air. Formaldehyde is a highly volatile organic pollutant. According to epidemiological surveys, people in non-industrial environments (such as indoor residents) are exposed to low concentrations of formaldehyde for a long time, and symptoms such as eye irritation, upper respiratory tract irritation, headache and cough will occur. If long-term inhalation of high-concentration formaldehyde gas, it may also cause bronchial asthma, and even lead to human t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/63C07D487/22
CPCC09D7/63C07D487/22
Inventor 张园
Owner 深圳世界美生物科技有限公司
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