Preparation method of water-resistant soy protein adhesive

Abstract

The invention discloses a preparation method of a water-resistant soy protein adhesive, and belongs to the technical field of chemical adhesives. The preparation method comprises the following steps:firstly, stirring for mixing soy protein and water, then adding endopeptidase, enzymolyzing while stirring at a constant temperature, heating for deactivating enzyme, and cooling to obtain an enzymolysate; then adding the enzymolysate into a reaction kettle, adjusting the pH value to 3.2-3.4, then adding linoleic acid, linseed oil and carbodiimide, reacting while stirring at the constant temperature, and concentrating under reduced pressure to obtain a concentrate; then heating and stirring for mixing the concentrate, a cosolvent, tripolycyanamide, iron salt, a filler and a preservative, thenadjusting the pH, continuing stirring for mixing, and then discharging to obtain the water-resistant soy protein adhesive. The water-resistant soy protein adhesive prepared by the preparation method provided by the invention has the characteristics of excellent water resistance and adhesive strength, and has a wide prospect in the development of the technological industry of chemical adhesives.

Description

technical field [0001] The invention discloses a preparation method of a water-resistant soybean protein adhesive, which belongs to the technical field of chemical adhesives. Background technique [0002] Soybean protein-based adhesive is an environmentally friendly adhesive, which has the characteristics of rich raw materials, high reactivity, simple operation, and no free formaldehyde release in glued products, and is increasingly valued and favored by people. However, low bonding strength and poor water resistance have always been the bottleneck problems restricting the development of soybean protein-based adhesives. Therefore, different methods have been adopted to modify them. Studies have confirmed that cross-linking agents with functionality ≥ 2, such as glyoxal, glutaraldehyde, dicyandiamide, maleic anhydride, polyisocyanate, etc., can react with soybean protein residues. This kind of crosslinking agent supplements and strengthens the easily damaged secondary struct...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: Aiming at the shortcomings of traditional soybean protein-based adhesives

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