Tough aldehyde-free soybean meal-based wood adhesive and preparation method thereof

Abstract

The invention discloses a tough aldehyde-free soybean meal-based wood adhesive and a preparation method thereof. The adhesive comprises, by weight, 30-33 parts of a main agent, 70 parts of dispersed medium water, 3-6 parts of a reinforcing agent, 0.1-0.2 part of a viscosity regulator, 2-4 parts of a crosslinking agent and 0.3-0.6 part of a catalyst. The preparation method comprises the following steps of weighing each component according to the corresponding weight ratio first, adding the crosslinking agent into the dispersed medium water, adding the main agent and the reinforcing agent, and homogenizing and emulsifying the mixture for 20 minutes under the action of an emulsifying force of 0.5 MPa at the pressure of 30 MPa through a high-pressure homogenizer; then, adding the catalyst into the obtained mixture, triggering a reaction at 80 DEG C for 30 minutes, cooling a finished product to 30 DEG C, and then discharging the finished product. The adhesive is likely to form a crosslinking structure, high in crosslinking density and low in reaction temperature; the prepared adhesive is stable in performance, the weak interface layer is obviously reduced, the cost is lowered, the dry / wet strength is high, and the product quality is stably improved.

Description

technical field [0001] The invention relates to the field of plywood preparation, in particular to a tough aldehyde-free soybean meal-based wood adhesive and a preparation method thereof. Background technique [0002] my country's precious wood resources are relatively scarce, and plantation forest resources are abundant. The use of plantation fast-growing wood to prepare wood-based panels through adhesives is the main raw material for furniture flooring and interior decoration in the living environment. In 2017, my country's total output of wood-based panels was 295 million cubic meters Rice, accounting for about 50% of the world's total production, of which more than 60% are plywood products. Based on the average production of 9 cubic meters of wood-based panels per ton of adhesive, the consumption of adhesives for plywood in my country in 2017 was about 18 million tons (solid content of 50%), of which urea-formaldehyde resin and its modified products accounted for the tota...

AI Technical Summary

Problems solved by technology

The use of biomass adhesives to prepare wood-based panels can solve the problem of free formaldehyde release from wood-based panels, which is an important way to solve the problem. However, most biomass adhesives have poor water resistance and bonding performance, which limits their industrial application.

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