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Formaldehyde eliminating agent and preparation method thereof

A formaldehyde remover and stabilizer technology, used in aldehyde/ketone condensation polymer adhesives, adhesives, adhesive types, etc., can solve the problems of reducing the efficiency and mechanical properties of urea-formaldehyde resin production of wood-based panels, and achieve formaldehyde removal. Long-lasting effect, lower formaldehyde emission, convenient use effect

Inactive Publication Date: 2013-03-20
BEIJING FORESTRY UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The primary purpose of the present invention is to provide a formaldehyde scavenger that can be directly added to the urea-formaldehyde resin adhesive for the problems existing in the prior art. Excellent efficiency and mechanical properties, fundamentally eliminate the problem of formaldehyde pollution in indoor air caused by wood-based panels and their products

Method used

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  • Formaldehyde eliminating agent and preparation method thereof
  • Formaldehyde eliminating agent and preparation method thereof
  • Formaldehyde eliminating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Prepare raw materials according to the following weight ratio

[0027] Water-emulsion epoxy resin (50% solid content): 200kg

[0028] Water: 400kg

[0029] Borax: 0.5kg

[0030] Melamine: 400kg

[0031] Sodium hydroxide solution (concentration 30%): appropriate amount

[0032] Formic acid solution (concentration 20%): appropriate amount

[0033] 2. Add water, borax, and melamine to the reaction kettle in turn, start stirring, raise the temperature to 40°C, stir well, and use formic acid to adjust the pH value of the reaction solution to 5.0-5.5;

[0034] 3. Raise the temperature to 70-72°C, react for 30 minutes, adjust the pH value to 6.0-8.0 with sodium hydroxide, cool down to 30°C, and discharge.

[0035] Table 1 Technical indicators of formaldehyde scavenger products

[0036]

Embodiment 2

[0038] 1. Prepare raw materials according to the following weight ratio

[0039] Water-soluble epoxy resin (50% solid content): 300kg

[0040] Distilled water: 800kg

[0041] Mixture of borax and calcium metaborate: 1kg

[0042] Melamine: 800kg

[0043] 2. The synthesis process is the same as in Example 1.

[0044] Table 2 Technical indicators of formaldehyde scavenger products

[0045]

Embodiment 3

[0047] 1. Prepare raw materials according to the following weight ratio:

[0048] Waterborne epoxy resin (50% solid content): 500kg

[0049] Deionized water: 1000kg

[0050] Mixture of borax and sodium metaborate: 8kg

[0051] Melamine: 1000kg

[0052] 2. The synthesis process is the same as in Example 1.

[0053] Table 3 Technical indicators of formaldehyde scavenger products

[0054]

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Abstract

The invention discloses a formaldehyde eliminating agent and a preparation method thereof. The formaldehyde eliminating agent consists of the following raw materials in part by weight: 100 to 300 parts of water borne epoxy resin (solid), 200 to 1,000 parts of melamine, 100 to 1,000 parts of water, and 0.1 to 10 parts of stabilizing agent. The preparation method for the formaldehyde eliminating agent comprises the following steps of: 1) sequentially adding the raw materials into a reaction kettle according to the raw material proportion of claim 1 or 2 with stirring, controlling the heating temperature at 40 to 60 DEG C, fully stirring the raw materials uniformly, and regulating the pH to be between 5.0 and 5.5 by using acid; and 2) heating the raw materials to the temperature of between 75 and 80 DEG C, reacting for 30 minutes, regulating the pH value to be between 6.0 and 8.0 by using alkali, cooling the reaction product to the temperature of 30 DEG C, and discharging.

Description

technical field [0001] The invention relates to a preparation for eliminating harmful chemical substances and a preparation method thereof, in particular to a preparation for eliminating formaldehyde and a preparation method thereof. Background technique [0002] With the continuous improvement of people's living standards, decoration and purchase of new furniture have become common things in people's lives. Various types of wood-based panels are often used in large quantities in decoration and furniture manufacturing, such as plywood, blockboard, medium-density fiberboard, and particle board. In 2009, the output of my country's wood-based panels has exceeded 100 million m 3 , ranked first in the world for many years in a row. However, 90% of the adhesives used in these wood-based panels are urea-formaldehyde resin and its modified products, which have the problem of formaldehyde release and often become the main source of formaldehyde pollution in indoor air. Although th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J11/08C09J11/06C09J11/04C09J161/24
Inventor 李建章张世锋刘江波于洋周文瑞高强
Owner BEIJING FORESTRY UNIVERSITY
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