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Preparation method of waterproof soyabean protein adhesive

A soybean protein and adhesive technology, which is applied in the preparation of protein adhesives, animal glue or gelatin, and adhesives, etc., can solve the problems of poor water-resistant gluing performance and low water-resistant gluing strength of soybean protein adhesives, achieve high water resistance, improve Water-resistant gluing performance, the effect of reducing the amount of use

Inactive Publication Date: 2012-10-03
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiency of the low water-resistant bonding strength of the above-mentioned soybean adhesive, solve the problem of poor water-resistant bonding performance of the soybean protein adhesive, and provide a soybean protein-epoxy system with strong water-resistant bonding strength. protein adhesive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Add 15g of soybean protein isolate and 150g of water into the reaction vessel, where water is the solvent, then add 0.1g of urea, 0.5g of sodium dodecylbenzenesulfonate and 0.2g of 2-mercapto Ethanol, at room temperature, using high-shear dispersion to fully and evenly mix and react the components to obtain a soybean protein emulsion;

[0021] (2) After the above process lasts for 1 hour, add 0.2g of glycerol to the above container and stir for 3 minutes. The function of glycerol is to ensure better compatibility between the soybean protein emulsion and the epoxy resin added later ;

[0022] (3) Add 5 g of E51 epoxy resin and 0.2 g of triethylenediamine hexahydrate in sequence to the reaction vessel, mix well, and react at 40° C. for 1 hour to prepare a water-resistant soybean protein adhesive.

[0023] After testing: the solid content of the adhesive is 30.2%, the contact angle on the poplar veneer surface is 42°, the viscosity measured by a rotational viscometer ...

Embodiment 2

[0025] (1) join the water of 20g soybean powder and 150g in the reaction vessel, wherein water is solvent, then add the urea of ​​0.6g successively, the 2-mercaptoethanol of the sodium dodecylbenzenesulfonate of 4g and 0.8g, At room temperature, the components are fully and uniformly mixed and reacted by using high-shear dispersion to obtain soybean protein emulsion;

[0026] (2) After the above process continues for 3 hours, add 1 g of glycerol to the above container, and stir for 5 minutes. The function of glycerol is to ensure better compatibility between the soybean protein emulsion and the epoxy resin added later;

[0027] (3) Add 20 g of E44 epoxy resin and 1 g of triethylenediamine hexahydrate in sequence to the reaction vessel, mix well, and react at 80° C. for 3 hours to prepare a water-resistant soybean protein adhesive.

[0028] After testing: the solid content of the adhesive is 37.4%, the contact angle on the poplar veneer surface is: 52°, the viscosity measured b...

Embodiment 3

[0030] (1) Add 17.5g of low-temperature soybean meal and 150g of water into the reaction vessel, where water is the solvent, and then add 0.35g of urea, 2.25g of sodium dodecylbenzenesulfonate and 0.5g of 2-mercapto Ethanol, at room temperature, using high-shear dispersion to fully and evenly mix and react the components to obtain a soybean protein emulsion;

[0031] (2) After the above process continues for 2 hours, add 0.6g of glycerol to the above container and stir for 4 minutes. The function of glycerol is to ensure better compatibility between the soybean protein emulsion and the epoxy resin added later ;

[0032] (3) Add 12.5 g of E51 type epoxy resin and 0.6 g of triethylenediamine hexahydrate in sequence to the reaction vessel, mix well, and react at 60° C. for 2 hours to prepare a water-resistant soybean protein adhesive.

[0033] After testing: the solid content of the adhesive is 35.3%, the contact angle on the surface of the poplar veneer is 47°, the viscosity me...

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Abstract

The invention relates to a preparation method of a waterproof soyabean protein adhesive, comprising the following steps of: adding soyabean protein and water, which is used as a solvent, to a reaction vessel, then sequentially adding urea, sodium dodecyl benzene sulfonate and 2-mercaptoethanol, and fully and uniformly mixing all components by utilizing high-shear dispersive action in the condition of room temperature for reaction to obtain a soyabean protein emulsion; and then adding glycerol to enhance the compatibility of the soyabean protein emulsion with epoxy resins added subsequently; sequentially adding the epoxy resin and a curing agent of triethylene diamine hexahydrate to the reaction vessel, uniformly mixing for reacting at 40-80 DEG C to prepare the waterproof soyabean proteinadhesive. With the method, the soyabean protein adhesive with excellent waterproof property is synthesized, can not generate poisonous and harmful matters such as formaldehyde, phenol and the like, is environmental-protection and sanitary when in use, and can be applied to the fields of woody laminated boards, shaving boards, fiber boards and the like.

Description

technical field [0001] The invention relates to a preparation method of a soybean protein adhesive, in particular to a preparation method of a water-resistant soybean adhesive. The soybean protein adhesive is mainly used in the production of wood plywood and furniture, and belongs to the technical field of wood adhesives. technical background [0002] Research on soybean-based adhesives began in 1923. Because synthetic resin adhesives made of petrochemical products have better bonding performance and water resistance, soybean-based adhesives were once replaced. In recent years, with the continuous expansion of the adhesive market, issues such as the limited global oil resources and environmental pollution have gradually attracted people's attention; and synthetic resin adhesives contain toxic substances such as formaldehyde and phenol, which will cause problems during production, transportation and use. Great harm to the environment and human health. Therefore, the adhesive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J189/00C09J163/02
Inventor 雷文王考将徐菡芳
Owner NANJING FORESTRY UNIV
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