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Modified soybean-based adhesive and preparation method thereof

An adhesive and modification technology, which is used in the preparation of adhesives, animal glue or gelatin, and the types of adhesives, etc., can solve the complex preparation methods of modified soybean-based adhesives, the dependence of synthetic adhesives on petroleum resources, and the low water-resistant bonding strength of wood-based panels. and other problems, to achieve the effect of easy control of finished product quality, solution of formaldehyde pollution problem and low production cost

Active Publication Date: 2012-06-27
XUZHOU ANLIAN WOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the wood adhesives used in my country are adhesives containing formaldehyde, and more than 90% are trialdehyde glues, namely urea-formaldehyde resin, phenolic resin and melamine resin. A large number of wood adhesives containing formaldehyde mainly exist in the following four aspects: (1) In the process of adhesive manufacturing, wood-based panel manufacturing and wood-based panel products (furniture, wooden floor, indoor wood decoration materials, etc.), formaldehyde will be continuously released, causing air pollution in workshops and living rooms, and threatening people's physical and mental health; (2) Phenolic adhesives and its wood-based panel products have the problem of phenol volatilization; (3) synthetic adhesives are heavily dependent on petroleum resources; (4) trialdehyde adhesives cannot be degraded and pollute the environment
[0010] The preparation method of the above-mentioned modified soybean-based adhesive is complicated, and the prepared modified soybean-based adhesive is used in the production of wood-based panels, and the water-resistant bonding strength of the wood-based panels is low and the service life is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1. Preparation of defatted soy flour mucus

[0045] 1) Prepare the raw materials (Kg) according to the following proportions by weight:

[0046] water 100

[0047] Urea 10

[0048] Defatted soy flour 35

[0049] 2) adding all the defatted soy flour and urea into a reaction kettle equipped with water, stirring and mixing to obtain a soy flour solution;

[0050] 3) Add pH regulator sodium bicarbonate to the soybean powder solution to adjust the pH value of the soybean powder solution to 8, heat up to make the temperature of the soybean powder solution reach and maintain 50°C, and react for 2 hours at 50°C , to obtain defatted soy flour mucus;

[0051] 2. Add the cross-linking agent polyethylene glycol dimethacrylate into the defatted soy flour mucus, and stir evenly to obtain the defatted soy flour-crosslinked mucus, wherein the defatted soy flour mucus and polyethylene glycol dimethyl The weight ratio of acrylic acid is 100:4;

[0052] 3. Add the initiator ammonium...

Embodiment 2

[0054] 1. Preparation of defatted soy flour mucus

[0055] 1) Prepare the raw materials (Kg) according to the following proportions by weight:

[0056] water 100

[0057] Urea 10

[0058] Defatted soy flour 15

[0059] 2) adding all the defatted soy flour and urea into a reaction kettle equipped with water, stirring and mixing to obtain a soy flour solution;

[0060] 3) Add pH regulator sodium hydroxide solution to the soybean powder solution, adjust the pH value of the soybean powder solution to 11, heat up to make the temperature of the soybean powder solution reach and maintain 60°C, and react under the condition of 60°C 0.5h, obtain defatted soy flour mucus, wherein the mass percent concentration of sodium hydroxide solution is 20%;

[0061] 2. Add the cross-linking agent polyethylene glycol diacrylate to the defatted soy flour mucus and stir evenly to obtain the defatted soy flour-crosslinked mucus, wherein the weight of the defatted soy flour mucus and polyethylene g...

Embodiment 3

[0064] 1. Preparation of defatted soy flour mucus

[0065] 1) Prepare the raw materials (Kg) according to the following proportions by weight:

[0066] water 100

[0067] Defatted soy flour 33

[0068] 2) adding all the defatted soybean powder into a reaction kettle equipped with water, stirring and mixing evenly to obtain a soybean powder solution;

[0069] 3) Add the pH regulator borax to the soybean powder solution, adjust the pH value of the soybean powder solution to 9, heat the soybean powder solution to reach and maintain the temperature at 10°C, and react for 3 hours at 10°C to obtain defatted soybeans powder slime;

[0070] 2. Add the cross-linking agent acrylamide into the defatted soy flour mucus and stir evenly to obtain the defatted soy flour-crosslinked mucus, wherein the weight ratio of the defatted soy flour mucilage to acrylamide is 100:5;

[0071] 3. The redox system initiator hydrogen peroxide-ferrous salt system (where Fe 2+ with H 2 o 2 The molar ra...

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PUM

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Abstract

The invention discloses a modified soybean-based protein adhesive and a preparation method thereof. The method comprises the following steps in sequence: (1) adding degreased bean flour into water for preparing bean flour mucilage; (2) adding a proper quantity of lye into the bean flour mucilage for modification, adding a crosslinking agent, and uniformly stirring for preparing the modified bean flour mucilage; (3) adding an initiator into the modified bean flour mucilage, and uniformly stirring. A man-made board made by the modified soybean-based protein adhesive has high waterproof bonding strength and no formaldehyde release.

Description

technical field [0001] The invention relates to a natural polymer compound-based adhesive and a preparation method, in particular to a protein-based adhesive and a preparation method. Background technique [0002] my country is the world's largest producer and consumer of wood-based panels and wood adhesives. In 2007, the production of wood-based panels consumed more than 5 million tons of adhesives (with a solid content of 100%). [0003] At present, most of the wood adhesives used in my country are adhesives containing formaldehyde, and more than 90% are trialdehyde glues, namely urea-formaldehyde resin, phenolic resin and melamine resin. A large number of wood adhesives containing formaldehyde mainly exist in the following four aspects: (1) In the process of adhesive manufacturing, wood-based panel manufacturing and wood-based panel products (furniture, wooden floor, indoor wood decoration materials, etc.), formaldehyde will be continuously released, causing air pollution ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J189/00
Inventor 张世锋李建章高强桑子涛周文瑞
Owner XUZHOU ANLIAN WOOD
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