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Adhesive for plywood and method for preparing same

A technology for adhesives and plywood, applied in the preparation of animal glue or gelatin, adhesives, adhesive types, etc., can solve the problems of unsatisfactory stability and viscosity, inconspicuous synergistic effect, poor practicability, etc., and achieve low price and high performance. Added value, the effect of ensuring practical performance

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

AI Technical Summary

Problems solved by technology

However, in the actual use process, it was found that due to the complexity of its components and the lack of obvious synergistic effect between them, its stability and viscosity were not ideal, and its practicability was poor. Therefore, it is still necessary to propose an environmentally friendly soybean protein with excellent performance. adhesive

Method used

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  • Adhesive for plywood and method for preparing same
  • Adhesive for plywood and method for preparing same
  • Adhesive for plywood and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Prepare materials according to the following weight ratio:

[0036]

[0037] Among them, the complexing agent is a powder prepared by the School of Materials Science and Technology of Beijing Forestry University, including zinc chloride: 0.8 parts, copper sulfate: 0.5 parts, zirconium carbonate: 0.5 parts, and the above components are ground and mixed evenly; The enhancer is glyoxal solution with a mass concentration of 30%.

[0038] 2) Add all the demineralized water, sodium carbonate, soybean protein powder and urea into the reaction kettle equipped with a stirrer, thermometer and condensing device, and stir evenly.

[0039] 3) Heating to 45-47°C, keeping it warm for 3 hours to obtain a mixture.

[0040] 4) Cool the mixture down to 30°C to make a uniform soy protein mucus.

[0041] 5) Add a complexing agent to the soy protein mucus and stir evenly to make it undergo complexation reaction.

[0042] 6) Continue to add the enhancer to it and stir evenly to obtain ...

Embodiment 2

[0044] 1) Prepare materials according to the following weight ratio:

[0045]

[0046] Among them, the complexing agent is a powder prepared by the School of Materials Science and Technology of Beijing Forestry University, including 1.2 parts of zinc chloride, 1.5 parts of copper sulfate, and 1.5 parts of zirconium carbonate. 30% glyoxal solution.

[0047] 2) Add all the demineralized water, sodium carbonate, urea, soybean protein powder into the reaction kettle equipped with agitator, thermometer and condensing device, and stir evenly;

[0048] 3) Heating to 40-42°C and reacting for 6 hours to obtain the mixture;

[0049] 4) Cool the mixture down to 30°C to make a uniform soy protein mucus.

[0050] 5) Add a complexing agent to the soy protein mucus and stir evenly to make it undergo complexation reaction.

[0051] 6) Continue to add the enhancer to it and stir evenly to obtain the soy protein adhesive. The performance and quality indicators of the adhesive obtained in...

Embodiment 3

[0053] 1) Prepare materials according to the following weight ratio:

[0054]

[0055] Among them, the complexing agent is a powder prepared by the School of Materials Science and Technology, Beijing Forestry University, including the following components in weight proportions: 0.8 parts of zinc chloride, 1.5 parts of copper sulfate, and 1 part of zirconium carbonate, which are ground evenly and mixed Uniform; the enhancer is a solution of glyoxal with a mass concentration of 30%.

[0056] 2) Add all the demineralized water, sodium carbonate, urea and soybean protein powder into the reaction kettle equipped with agitator, thermometer and condensing device, and stir evenly.

[0057] 3) Heating to 68-70°C and reacting for 5 hours to obtain a mixture.

[0058] 4) Cool the mixture down to 30°C to make a uniform soy protein mucus.

[0059] 5) Add a complexing agent to the soy protein mucus and stir evenly to make it undergo complexation reaction.

[0060] 6) Continue to add t...

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Abstract

The invention provides an adhesive for a plywood, prepared from the following raw materials according to parts by weight: 70-80 parts of dispersion medium, 20-35 parts of degreased soyabean protein powder, 0.5-3 parts of sodium carbonate, 2-6 parts of urea, 1-2 parts of complexing agent and 1-5 parts of enhancer. The adhesive provided by the invention has the characteristics that all the components have excellent mutual synergistic effect, a materials such as a metal salt is compounded with the soybean protein, and simultaneously, glutaraldehyde is taken as the enhancer so that the problem of poor water resistence of the common soybean protein adhesive is solved; therefore, the adhesive is capable of meeting the waterproof requirement of the adhesive for the plywood and guaranteeing the practical performance of the soybean protein adhesive; and the plywood prepared by using the adhesive provided by the invention is capable of meeting the international requirements of the class II plywood. Besides, the invention also provides a method for preparing the adhesive for the plywood; and the method is simple in process, convenient for operation and suitable for popularization and application.

Description

technical field [0001] The invention relates to an adhesive and a preparation method thereof, in particular to an adhesive for preparing plywood and a preparation method thereof. Background technique [0002] Over the past 30 years, my country's wood-based panel production has grown rapidly. In 2010, the total output of my country's wood-based panels was 153.6 million cubic meters, accounting for about 50% of the world's weight, including 71.3966 million cubic meters of plywood and 16.5228 million cubic meters of blockboard. The total output of wood-based panels, plywood, furniture, and wood flooring has ranked first in the world for many years in a row. [0003] The adhesives commonly used in the production of wood-based panels are formaldehyde-based synthetic resins, mainly urea-formaldehyde resins and their modified products. Although after years of hard work, the production level of wood-based panel adhesives in my country has been greatly improved, and the environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J11/04C09J11/06
Inventor 张纪芝张世锋李建章周文瑞高强
Owner BEIJING FORESTRY UNIVERSITY
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