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Protein-based wood adhesive, and preparation method and application and use method thereof

A wood adhesive, protein-based technology, applied in the field of protein-based wood adhesives and its preparation, can solve the problems of poor water resistance, high price, and limited scope of application of price

Active Publication Date: 2015-07-15
河南万广建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the most widely used is urea-formaldehyde glue (UF), which is characterized by low price and excellent performance, but poor water resistance.
Although phenolic glue (PF) has good water resistance, its dark brown color and high price determine its scope of application is relatively limited, generally for outdoor
Melamine glue (MF) has excellent performance and good water resistance, but its price is high, so its market acceptance is low
However, due to factors such as high price and long reaction time of traditional epoxy resin, few people apply it in the plate processing industry.

Method used

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  • Protein-based wood adhesive, and preparation method and application and use method thereof

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preparation example Construction

[0137] In the preparation method of the present invention, when preparing the protein-based wood adhesive, the inorganic base can also be added to the formaldehyde-free curing agent solution and stirred evenly, then the vegetable protein or the mixture of vegetable protein and lignin can be added, and then mixed as required Add the stuffing.

[0138] On the other hand, the present invention also provides an application of the above-mentioned protein-based wood adhesive.

[0139] The protein-based wood adhesives of the present invention can be used for wood-based panels such as plywood, woodworking board, bamboo plywood, particleboard (OSB), large-sheet particleboard, fiberboard (including medium-density and high-density fiberboard), parallel lumber (PSL), sandwich lumber (LSL), laminated veneer lumber (LVL), and various types of composite flooring, bamboo flooring, laminate flooring, etc.

[0140] A method for using the above-mentioned protein-based wood adhesive in bonding w...

Embodiment 1

[0173] Synthetic protein-based wood adhesive A

[0174]In a 500 mL beaker, slowly add soybean powder (20 g) to 36 g of stirring water, slowly drop in 20 wt% NaOH solution, adjust the pH of the soybean slurry to 10, continue stirring for 10 minutes, Add 40 grams of 10 wt% DMP30-epichlorohydrin (IA) aqueous solution to the soybean flour mixed solution, and continue stirring for 10 minutes to obtain the mixed solution as Adhesive A for bonding wood. After testing, the dry bonding strength of the obtained composite plywood was 5 MPa, and the wet strength after soaking in hot water at 60°C for 3 h was 1.5 MPa.

Embodiment 2

[0176] Synthetic protein-based wood adhesive B

[0177] In a 500 mL beaker, add 40 g of a 10 wt% aqueous solution of DMP30-epichlorohydrin (IA) to 36 g of water under stirring, slowly add 0.2 g of CaO under vigorous stirring, and stir for 10 min. Then slowly add 20 grams of bean flour, add and continue to stir the mixed solution obtained for 20 minutes as the adhesive B for bonding wood. After testing, the dry bonding strength of the obtained composite plywood was 4.6 MPa, and the wet strength after soaking in hot water at 60°C for 3 h was 1.6 MPa.

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Abstract

The invention relates to a protein-based wood adhesive and a preparation method thereof, and particularly relates to a protein-based wood adhesive prepared from vegetable protein and non-toxic epoxy resin and a preparation method thereof. The protein-based wood adhesive is prepared from natural vegetable protein, a formaldehyde-free epoxy resin curing agent, a filler and the like. The protein-based wood adhesive disclosed by the invention is a non-toxic and environment-friendly adhesive, and no formaldehyde or a toxic organic substance is released in production, transportation and application processes or use of the product. Meanwhile, the adhesive is high in bonding strength, and good in water tolerance, the strength of the adhesive after being boiled by boiling water can be comparable to the performance of phenol glue, and the use standard of secondary glue is completely achieved. The protein-based wood adhesive provided by the invention is simple in preparation technology, the hot-press time is much smaller than that of a formaldehyde-type adhesive, and an energy source is greatly saved.

Description

Technical field [0001] The present invention relates to a wood adhesive and its preparation method, in particular to a protein-based wood adhesive made of plant protein and non-toxic epoxy resin, its preparation method, application and use method. Background technique [0002] It is well known that the wood industry uses large quantities of adhesives for product processing. The most commonly used wood adhesives in industry today are phenol-formaldehyde resin (PF), urea-formaldehyde resin (UF) and melamine-formaldehyde resin (MF). These three types of glue are collectively called trialdehyde glue and have their own advantages and disadvantages. Among them, the most widely used is urea-formaldehyde glue (UF), which is characterized by low price and excellent performance, but poor water resistance. Although phenolic glue (PF) has good water resistance, its dark brown color and high price determine that its scope of application is relatively limited, usually outdoors. Melamin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J197/00C09J11/08C09J11/06C09J11/04B27D1/08
Inventor 阎肖华
Owner 河南万广建设有限公司