A kind of resin type silicate wood modifier and preparation method of modified material thereof

A resin-type, silicate technology, applied in the direction of impregnating wood, wood impregnation, wood processing equipment, etc., can solve the problems of easy loss of modifiers, unstable size of treated materials, and water resistance, etc., to achieve enhanced loss resistance, Realize the effect of repeated recycling and stable storage

Active Publication Date: 2016-01-13
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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AI Technical Summary

Problems solved by technology

However, the inorganic salt modifier absorbs moisture and is not resistant to water, which leads to unstable dimensions of the treated material and the modifier is easy to lose

Method used

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Embodiment Construction

[0017] A resin type silicate wood modifier and a method for preparing the modified material thereof, the steps are as follows;

[0018] ((1) According to the molar ratio of melamine, formaldehyde, and urea, prepare materials according to the ratio of 1:2~3:0.2~1.0, the amount of soluble sodium silicate solution is 20%~50% of melamine, polyvinyl alcohol and diethylene glycol are added The amount is 0.1%~5% and 10%~30% of formaldehyde respectively, the catalyst is sodium hydroxide and acetic acid solution, the mass percent concentration is 20% and 10% respectively, and the mass percent concentration of formaldehyde and sodium silicate solution is 37% respectively. % and 30%;

[0019] (2) Add formaldehyde and polyvinyl alcohol into the reaction kettle, heat up to 50~60°C, stir evenly, adjust the pH value of the solution to 4.0~5.0 with acetic acid, keep the temperature at 60~70°C, and react for 10~30 minutes to obtain A mixture of formaldehyde and polyvinyl formal;

[0020] (3)...

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PUM

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Abstract

The invention belongs to a resin type silicate wood modifier and a preparation method of a modified material of the modifier. According to the preparation method, the resin type silicate wood modifier is prepared by taking melamine, formaldehyde, urea and soluble sodium silicate as main raw materials as well as respectively taking polyvinyl alcohol and diethylene glycol as a toughening agent and a stabilizer; the resin type silicate wood modifier can be stably stored for a long time and can be repeatedly recycled. The modifier has the advantages that the dimensional stability, the density, the surface hardness, the anti-bending strength, the anti-bending elastic modulus, the impact toughness and the wear resistance of artificial forest wood processed by virtue of the modifier are substantially improved, the modifier has the advantages that the flame retardance and environment-friendly effect are achieved, no pollution is caused to a human body and the environment, the leachability resistance of the modifier in the processed wood is improved, and the application value of the artificial forest wood is improved.

Description

technical field [0001] The invention belongs to a resin type silicate wood modifier and a preparation method of the modified material. Background technique [0002] Over the years, the area of ​​my country's plantation forest resources has been ranking first in the world. However, due to the short growth cycle and large variability of plantation wood, it is often soft, low-density, and low-strength (such as poplar, fir, etc.), its application range is greatly limited, and the added value of the product is low. Impregnation treatment of wood with water-soluble low molecular weight melamine-formaldehyde resin solution can greatly improve its physical and mechanical properties such as density, dimensional stability, flexural strength and elastic modulus, and is an effective wood modification method. However, this resin modifier also has defects or problems such as poor stability, difficulty in long-term storage, reduced wood toughness, relatively single function, and high cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/40C08G12/42C08G12/12C08F8/28B27K3/52
Inventor 刘君良柴宇博吕文华张玉萍孙柏玲王小青
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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