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Preparation method for waterproof soybean-based adhesive

A technology of water resistance and soybean protein glue, applied in the preparation of animal glue or gelatin, adhesives, adhesive additives, etc., can solve the problems of low bonding strength, poor water resistance, etc., achieve high matching, good bonding performance, and preparation The process is simple and feasible

Active Publication Date: 2013-11-13
宁波朝露新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of low bonding strength and poor water resistance existing in existing soybean adhesives, and provide a water-resistant soybean-based adhesive, which has strong bonding strength and better water resistance, and is suitable for solid wood composites. The use of floor veneer, the production process is simple and convenient, suitable for the production process of the current floor industry, no pollution, suitable for industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Mix 100 parts by weight of water and 0.3 parts by weight of sodium hydroxide to prepare a sodium hydroxide solution, then add 25 parts by weight of defatted soybean meal powder into the sodium hydroxide solution, and stir evenly to obtain a semi-finished product of soybean protein glue;

[0030] (2) After the semi-finished product of soybean protein glue is left to stand for 0.5h, stir and add oxalic acid solution with a mass concentration of 15% to adjust the pH to 3-4. After mixing, add 2 parts by weight of methylol urea (prepared to The methylol urea solution was added) and 0.01 parts by weight of the developer, stirred evenly, and vacuum defoamed to obtain a water-resistant soybean-based adhesive.

[0031] The prepared water-resistant soybean-based adhesive was subjected to a 7-layer eucalyptus-based board test. The 7-layer eucalyptus-based production process is suitable for most of the factory's existing process conditions, and the coating amount is 360g / m 2 (D...

Embodiment 2

[0034] (1) Mix 100 parts by weight of water and 0.5 parts by weight of sodium hydroxide to prepare a sodium hydroxide solution, then add 60 parts by weight of defatted soybean meal powder into the sodium hydroxide solution, and stir evenly to obtain a semi-finished product of soybean protein glue;

[0035](2) After the semi-finished product of soybean protein glue is left to stand for 3 hours, stir and add oxalic acid solution with a mass concentration of 20% to adjust the pH to 3-4. urea solution) and 0.5 parts by weight of a developer, stirred evenly, and vacuum defoaming to obtain a water-resistant soybean-based adhesive.

[0036] With reference to the detection method of Example 1, the test results: the average dry strength of the board is 2.5Mpa, and the average wet strength is 1.65Mpa, meeting the requirements of the national second-class board.

Embodiment 3

[0038] (1) Mix 100 parts by weight of water and 0.4 parts by weight of sodium hydroxide to prepare a sodium hydroxide solution, then add 30 parts by weight of defatted soybean meal powder into the sodium hydroxide solution and stir while adding There are 3 parts by weight of urea (added after being prepared into a 30wt% urea solution), and stirred evenly to obtain a semi-finished product of soybean protein glue;

[0039] (2) After the semi-finished product of soybean protein glue is left to stand for 1 hour, stir and add oxalic acid solution with a mass concentration of 15% to adjust the pH to 3-4. urea solution), 0.5 parts by weight of hexamethylenetetramine (formulated into 1wt% hexamethylenetetramine solution to add), 0.05 parts by weight of developer and 6 parts by weight of sodium benzoate (formulated into 15wt% benzene Add sodium formate solution), stir evenly, and obtain a water-resistant soybean-based adhesive after vacuum defoaming.

[0040] With reference to the det...

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PUM

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Abstract

The invention discloses a preparation method for a waterproof soybean-based adhesive. The preparation method for the waterproof soybean-based adhesive comprises the following steps: (1) mixing water and sodium hydroxide or sodium dodecyl sulfate to prepare a solution A, then adding degreased soybean cake powder into the solution A and carrying out uniform mixing with stirring so as to obtain a semi-finished soybean protein adhesive product; and (2) standing the semi-finished soybean protein adhesive product for 0.5 to 3 h, carrying out stirring, adding an acid solution to adjust a pH value to 3 to 4, carrying out uniform mixing, then adding a modifier and a developer or adding the modifier, the developer and an antiseptic and carrying out uniform mixing with stirring and vacuum defoamation so as to obtain the waterproof soybean-based adhesive. The waterproof soybean-based adhesive has good bonding strength and water resistance and is applicable to veneering of parquet; the preparation method is simple and convenient, applicable to the current floor industry, free of pollution and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of wood adhesive production, in particular to a water-resistant soybean-based adhesive suitable for solid wood composite floor veneers. Background technique [0002] Adhesives for wood-based panels in my country are mainly "three-formaldehyde adhesives", including urea-formaldehyde, phenolic, and melamine resin adhesives. These organic adhesives will continuously release formaldehyde and phenol during production and use. , benzene volatiles and other VOC gases, which seriously pollute the indoor environment and endanger human health. In addition, the raw materials of aldehyde-based adhesives are all from petrochemical industry products, which are non-renewable resources. With the increasing scarcity of petroleum resources , the production cost of aldehyde-based adhesives is rising steadily, which makes the adhesive industry begin to reconsider the development of new environmentally friendly green adhesives. As...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J11/06C09J11/08
Inventor 陈峰刘小青吴頔徐益忠
Owner 宁波朝露新材料科技有限公司