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Protein-based wood adhesive and preparation method thereof

A wood adhesive and protein-based technology, which is applied in the field of protein-based wood adhesive and its preparation, can solve the problems of limited price application range, low market acceptance, and high dark brown color, and achieve lower temperature, low price, and simple synthesis method Effect

Inactive Publication Date: 2014-04-23
阎肖华
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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 thereof
  • Protein-based wood adhesive and preparation method thereof
  • Protein-based wood adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Synthesis of Quaternary Ammonium Epoxy Resin (Compound IA)

[0054] (IA)

[0055] Add 1404.4 g of water into a 2000 mL three-necked flask, and then slowly add 2,4,6-tris-(dimethylaminomethyl)phenol (DMP30, 167.5 g, 661 mmol, 95%). After the addition, the solution was cooled to 0°C, and epichlorohydrin (174.8 g, 1.89 mol) was slowly added dropwise, and the temperature was controlled below 25°C during the dropwise addition. After dropping, stir at this temperature for 2 h, then increase the temperature to 30°C and stir for 1 h to obtain the aromatic curing agent DMP30-epichlorohydrin IA.

Embodiment 2

[0057] Synthesis of Quaternary Ammonium Epoxy Resin (Compound IB)

[0058] (IB)

[0059] Add 1048.8 g of water into a 2000 mL three-necked flask, and then slowly add 3,5-bis-(dimethylaminomethyl)phenol (137.5 g, 661 mmol). After the addition, the solution was cooled to 0°C, and epichlorohydrin (124.7 g, 1.22 mol) was slowly added dropwise, and the temperature was controlled to be less than 25°C during the dropwise addition. After dropping, stir at this temperature for 2 h, then raise the temperature to 30°C and stir for 1 h to obtain the aromatic curing agent 3,5-bis-(dimethylaminomethyl)phenol-epichlorohydrin IB.

Embodiment 3

[0061] Synthesis of Quaternary Ammonium Epoxy Resin (Compound IC)

[0062] (IC)

[0063] Add 1048.8 g of water into a 2000 mL three-necked flask, and then slowly add 2,4-bis-(dimethylaminomethyl)phenol (137.5 g, 661 mmol). After the addition, the solution was cooled to 0°C, and epichlorohydrin (124.7 g, 1.22 mol) was slowly added dropwise, and the temperature was controlled to be less than 25°C during the dropwise addition. After dropping, stir at this temperature for 2 h, then raise the temperature to 30°C and stir for 1 h to obtain the aromatic curing agent 2,4-bis-(dimethylaminomethyl)phenol-epichlorohydrin IC.

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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 invention relates to a wood adhesive and a preparation method thereof, in particular to a protein-based wood adhesive made of vegetable protein and non-toxic epoxy resin and a preparation method thereof. Background technique [0002] As we all know, the wood industry needs to use a lot of adhesives for product processing. The most commonly used wood adhesives in industry today are phenol-formaldehyde (PF), urea-formaldehyde (UF) and melamine-formaldehyde (MF). These three kinds 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 its scope of application is relatively limited, generally outdoors. Melamine glue (MF) has excellent performance and g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J163/00C09J197/00C09J11/04C09J11/06C09J11/08
Inventor 阎肖华
Owner 阎肖华
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