A kind of high-strength environmental protection wood board adhesive and preparation method thereof

Abstract

The invention discloses a high-strength environment-friendly wood board adhesive and a preparation method thereof, which are prepared from the following raw materials in parts by weight: 30-50 parts of polyisocyanate, 5-15 parts of hydroxyl-terminated ethylene oxide-tetrahydrofuran copolyether, modified 5-10 parts of polyimide, 60-90 parts of fluorine-containing polyether diol, 0.5-2 parts of dibutyltin dilaurate, 0.2-0.5 parts of boron trifluoride triethanolamine complex, 0.1- part of antioxidant 0.3 part, antioxidant 0.1-0.3 part. In the preparation process of the adhesive of the invention, there are few side reactions and residual solvents, the preparation conditions are mild, the operation is simple, and the environment is not polluted. At the same time, the obtained product has excellent mechanical properties and can reach ideal standards in terms of bonding strength and shear strength. , has better use value.

Description

technical field [0001] The invention belongs to the technical field of adhesive preparation, and in particular relates to a high-strength environment-friendly wood board adhesive and a preparation method thereof. Background technique [0002] Wood adhesives are products used in the wood processing industry, such as the production of plywood, particleboard, laminates, decorative cladding panels and blockboards, which require adhesives with different properties. The emergence of adhesives not only plays an important role in saving wood and simplifying the production process, but also makes composite materials with various properties, so as to exert the unique functions of wood and provide some special purposes. In the traditional plywood industry, most of them use UF glue (urea-formaldehyde resin) to add a certain amount of starch to thicken and put into production, but because it will volatilize to produce formaldehyde, pollute the air, and cause hidden dangers to human healt...

AI Technical Summary

Problems solved by technology

In the traditional plywood industry, most of them use UF glue (urea-formaldehyde resin) to add a certain amount of starch to thicken and put it into production, but because it will volatilize and produce formaldehyde, pollute the air, and cause hidden dangers to human health, so its application is limited.

[0003] Polyurethane adhesives refer to adhesives containing carbamate groups (-NHCOO-) or isocyanate groups (-NCO) in the molecular chain, which have the characteristics of low VOC content, low or no environmental pollution, and non-combustibility. At the same time, it has excellent shear strength and impact resistance properties. At the same time, the performance of polyurethane adhesives is often further improved through the use of reinforcing components. Among them, polyimide as an additive has excellent thermal stability, mechanical properties, Solvent resistance, etc., but because of the above stability, it is difficult to dissolve and process, so it is not easy to introduce it into the polyurethane system for performance enhancement