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Environment-friendly water-tolerant adhesive for wood

An adhesive and water-resistant technology, applied in the direction of adhesives, protein adhesives, polymer adhesive additives, etc., can solve the problems of poor water resistance of soybean adhesives, and the bonding strength cannot meet the production requirements of wood-based panels, etc., to achieve high bonding strength, Good water resistance and broad market prospects

Inactive Publication Date: 2017-02-22
JIANGXI HUACHANG WOOD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water resistance of soybean adhesive is poor, and the bonding strength cannot meet the production requirements of wood-based panels, so it is subject to certain restrictions as an adhesive for wood

Method used

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  • Environment-friendly water-tolerant adhesive for wood
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: a kind of adhesive for environment-friendly water-resistant type wood, its preparation method is:

[0018] (1) Dissolve 26 parts of low-temperature defatted soybean powder in 120 parts of water, stir evenly at 35°C, adjust the pH to 5.0, add 12 parts of sodium lauryl sulfate and 2.0 parts of sodium humate, and keep it at 35°C for 4 hours to obtain Soybean flour slurry after pretreatment;

[0019] (2) Adjust the pH of the pretreated soybean flour slurry to 11.0, add 0.2 parts of glutaraldehyde and react at 30°C for 1 hour, raise the temperature to 45°C, add 0.3 parts of carboxymethylcellulose sodium, and react for 75 minutes to obtain a semi-finished adhesive;

[0020] (3) Add 3.8 parts of herbal extracts to the semi-finished adhesive, raise the temperature to 55°C, stir at 150r / min for 5h, then cool to room temperature to obtain the product.

[0021] The preparation method of the herbal extract is as follows: 3 parts of cinnamon, 12 parts of Imperata rhiz...

Embodiment 2

[0022] Embodiment 2: a kind of adhesive for environment-friendly water-resistant type wood, its preparation method is:

[0023] (1) Dissolve 26 parts of low-temperature defatted soybean powder in 120 parts of water, stir evenly at 35°C, adjust the pH to 5.0, add 12 parts of sodium lauryl sulfate and 1.5 parts of sodium humate, and keep it at 35°C for 4 hours to obtain Soybean flour slurry after pretreatment;

[0024] (2) Adjust the pH of the pretreated soybean flour slurry to 11.0, add 0.2 parts of glutaraldehyde and react at 30°C for 1 hour, raise the temperature to 40°C, add 0.1 part of sodium carboxymethylcellulose, and react for 70 minutes to obtain a semi-finished adhesive;

[0025] (3) Add 3.2 parts of herbal extracts to the semi-finished adhesive, heat up to 50°C, stir at 100r / min for 3h, then cool to room temperature to obtain the product.

[0026] The preparation method of the herbal extract is as follows: 1 part of cassia bark, 10 parts of Imperata praecox root, 6 p...

Embodiment 3

[0027] Embodiment 3: a kind of adhesive for environment-friendly water-resistant type wood, its preparation method is:

[0028] (1) Dissolve 26 parts of low-temperature defatted soybean powder in 120 parts of water, stir evenly at 35°C, adjust the pH to 5.0, add 12 parts of sodium lauryl sulfate and 2.5 parts of sodium humate, and keep it at 35°C for 4 hours to obtain Soybean flour slurry after pretreatment;

[0029] (2) Adjust the pH of the pretreated soybean flour slurry to 11.0, add 0.2 parts of glutaraldehyde and react at 30°C for 1 hour, raise the temperature to 50°C, add 0.5 parts of carboxymethylcellulose sodium, and react for 80 minutes to obtain a semi-finished adhesive;

[0030] (3) Add 4.5 parts of herbal extract to the semi-finished adhesive, heat up to 60°C, stir at 200r / min for 6h, then cool to room temperature to obtain the product.

[0031] The preparation method of the herbal extract is as follows: 5 parts of cassia bark, 15 parts of coriander root, 10 parts ...

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Abstract

The invention provides an environment-friendly water-tolerant adhesive for wood. Defatted soybean powder is modified by lauryl sodium sulfate and glutaraldehyde, so that the bonding performance and the water tolerance of the prepared soybean adhesive can be improved. The defatted soybean powder is modified by adding sodium humate, sodium carboxymethylcellulose and traditional Chinese herbal medicine extracts according to a specific ratio as well as the lauryl sodium sulfate and the glutaraldehyde, so that the bonding strength can be further improved. By adoption of the preparation process provided by the invention, the water tolerance of the soybean adhesive can be further improved, and the prepared plywood is insusceptible to swelling and falling-off phenomenon in water. The soybean adhesive prepared by the method has high bonding strength and high water tolerance, and is an environment-friendly wood adhesive with a wide market prospect.

Description

technical field [0001] The invention relates to an adhesive for wood, in particular to an adhesive for environmental protection and water-resistant wood. Background technique [0002] At present, the adhesives used in the production of plywood are still mainly formaldehyde-based adhesives. Since the products bonded by formaldehyde-based adhesives will release free formaldehyde during production and use, which seriously endangers human health. Therefore, in the consumer awareness of environmental protection Increasingly, the use of formaldehyde-based adhesives (especially for bonding of interior products) is becoming more and more restricted. [0003] Soybean adhesive is a natural resource adhesive with great development potential. However, the water resistance of soybean adhesive is poor, and the bonding strength cannot meet the production requirements of wood-based panels, so it is limited as an adhesive for wood. It needs to be modified to improve bond strength and water...

Claims

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Application Information

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IPC IPC(8): C09J189/00C09J11/08C09J11/06C08H1/00
CPCC09J189/00C08H1/00C09J11/06C09J11/08C08L1/286C08K5/00
Inventor 周利斌
Owner JIANGXI HUACHANG WOOD CO LTD