Protein adhesive, preparation method and application thereof

A protein and adhesive technology, applied in the field of chemistry, can solve the problems of unsatisfactory bonding strength and water resistance of soybean protein adhesives, restrict the popularization and application of adhesives, etc., achieve huge market potential and application prospects, easy to operate Sizing, no formaldehyde release effect

Inactive Publication Date: 2014-04-09
张成栋 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the unsatisfactory bond strength and water resistance of soybean protein adhesives, the popularization and application of this adhesive is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 10 g of soybean protein isolate powder and 40 g of water into an experimental reaction kettle, mix and stir for 30 minutes to obtain a protein solution. Add 20 g of sucrose to the protein solution and stir for 30 minutes. Finally, 30 g of polyamide polyamine epichlorohydrin resin with a concentration of 10% was added, stirred for 30 minutes, and discharged to obtain a protein adhesive. The obtained protein adhesive has a solid content of 33% and a viscosity of 232cps. It is used for the bonding of three-layer poplar plywood. The measured dry strength is 1.82MPa and the wet strength is 0.81MPa.

Embodiment 2

[0031] Add 10 g of soybean protein isolate powder and 20 g of water into an experimental reaction kettle, mix and stir for 30 minutes to obtain a protein solution. Add 30 g of glycerol to the protein solution and stir for 30 minutes. Finally, 40 g of polyamide polyamine epichlorohydrin resin with a concentration of 10% was added, stirred for 30 minutes and discharged to obtain a protein adhesive. The obtained protein adhesive has a solid content of 44% and a viscosity of 106 cps. It is used for the bonding of three-layer poplar plywood. The measured dry strength is 2.23 MPa and the wet strength is 0.87 MPa.

Embodiment 3

[0033] Add 15 g of soybean protein isolate powder and 30 g of water into an experimental reaction kettle, mix and stir for 30 minutes to obtain a protein solution. Add 20 g of sodium chloride to the protein solution and stir for 30 minutes. Finally, 35 g of polyamide polyamine epichlorohydrin resin with a concentration of 10% was added, stirred for 30 minutes and discharged to obtain a protein adhesive. The obtained protein adhesive has a solid content of 38.5% and a viscosity of 246cps. It is used for bonding three-layer poplar plywood. The measured dry strength is 1.79MPa and the wet strength is 0.79MPa.

[0034] The dry strength of the three-layer poplar plywood in Examples 1 to 3 of the present invention is greater than or equal to 1.79MPa, and the wet strength is greater than or equal to 0.79Mpa, all of which are better than the national second-class wood-based plywood standards, and there is no formaldehyde release , is a real environment-friendly adhesive for wood-base...

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Abstract

The invention relates to a protein adhesive, a preparation method and application thereof. The protein adhesive consists of the following raw materials by weight: 10-30 parts of a protein substrate, 30-70 parts of water, 10-30 parts of a formaldehyde-free crosslinking agent, and 10-30 parts of a diluent. The protein adhesive prepared by the invention has the advantages of high initial adhesion, low viscosity, and high solid content that can be adjustable according to the actual production status. An artificial board made by the protein adhesive prepared by the invention not only has good bonding strength and water resistance, but also has no release of formaldehyde, and all indicators reach and exceed the standards of national Class II artificial boards.

Description

technical field [0001] The invention relates to a protein adhesive and its preparation method and application, belonging to the technical field of chemistry. Background technique [0002] Formaldehyde-based synthetic resin adhesives, such as urea-formaldehyde adhesives and phenolic adhesives, are widely used in the wood-based panel industry due to their excellent bond strength and water resistance. These resin adhesives synthesized from petrochemical products use non-renewable petroleum resources, and at the same time release a large amount of type 1 carcinogens such as formaldehyde, which poses a health hazard to workers and consumers during production and use. serious hazard. Therefore, soybean protein adhesive products that are produced from renewable resources and are environmentally friendly and can replace synthetic resin adhesives have become a research hotspot in recent years. [0003] Due to the unsatisfactory bond strength and water resistance of soybean protein ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J11/08C09J11/04C09J11/06
Inventor 张成栋
Owner 张成栋
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