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New formadehyde catching agent and its preparing method

A formaldehyde scavenger, a new type of formaldehyde technology, applied in the direction of adhesive additives, non-polymer adhesive additives, coatings, etc., can solve the problems of undiscovered formaldehyde scavenger, stimulation, and reduce formaldehyde release, and achieve the elimination of long-term Residual hazards, improved utilization, and low cost effects

Inactive Publication Date: 2003-06-25
TSINGHUA UNIV
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

The addition of these catching agents, some affect the performance of the coating, some are too expensive, and some will produce new pollution while reducing the amount of formaldehyde released. In addition, because of their own corrosion and stimulation, they cannot Call it a real environmental protection product
In addition, the reported Japanese patents JP52-142736 and JP53-143636 use green tea powder as a resin filler, and the domestic CN1298911A directly uses tea powder as a wood adhesive urea-formaldehyde resin filler and formaldehyde scavenger, but has not been found to use Report on flavonoids (tea polyphenols) in tea as formaldehyde scavenger for coatings and binders

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0029] 2) Preparation of tea polyphenols. craft

[0030] ① Use 3 to 6 times the volume of tea powder in 85% ethanol water as the extract, and extract in a water bath for 20 minutes under the condition of sufficient stirring, at 50 to 80 ° C. After filtering out the solution, add 2 to 3 times 85% ethanol water , stirred for 20 minutes, and combined the filtrates; under the pressure of 10-100Pa, distilled off ethanol in a water bath under reduced pressure to obtain a concentrated solution; the concentrated solution was extracted with double the amount of chloroform until it was colorless, and placed in a separatory funnel after shaking for 5 minutes each time Middle separation; hot air drives away residual ethanol and chloroform;

[0031] ②Extract 4 to 7 times with 1:1 ethyl acetate, and combine the extracts;

[0032] ③Under the pressure of 10-100Pa, distill the ethyl acetate under reduced pressure in a water bath, dry the concentrated solution in vacuum, and grind it while it...

Embodiment 1

[0039] 9 servings of pure tea polyphenols

[0040] Emulsifier Monoglycerin (MG), 1 part

[0041] It is added as a filler before the use of coatings and adhesives, and used after stirring.

Embodiment 2

[0043] 10 servings of pure tea polyphenols

[0044] 95 parts of water

[0045] Emulsifier diacid ester (DG) 5 parts

[0046] After the paint is applied, it is sprayed on the coated surface and in the surrounding air.

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Abstract

The present invention discloses a chemical material. The formaldehyde catching agent is prepared with tea as main material and ethanol as solvent. Through soaking, filtering, extraction, distilling, drying and other steps, tea polyphenol is prepared and is further compounded into solution as the formaldehyde catching agent. The formaldehyde catching agent is added into paint or adhesive or sprayed to surface of furniture or ambient air to lower the formaldehyde content. It has no harm to human body.

Description

technical field [0001] The invention belongs to the scope of chemical materials, in particular to a novel formaldehyde scavenger and a preparation method thereof. Background technique [0002] With the strengthening of people's awareness of environmental protection and health, countries all over the world are actively developing and producing products that are beneficial to environmental protection and human health. Most of the time for human activities is indoors. With the improvement of people's life quality, home decoration is often used to beautify the living room environment, but paints and adhesives are used in large areas during decoration. However, with the volatile The pollution caused by organic compounds has come one after another, causing great harm to the environment and the human body. According to the first national academic seminar on indoor air quality and health organized by the Chinese Preventive Medicine Association: At present, the number of households i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/30C09D7/12C09J11/06
Inventor 何国荣王锐温富王晓琳
Owner TSINGHUA UNIV
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