Aldehyde-free low-cost polysaccharide adhesive and preparation method thereof

Abstract

The invention discloses an aldehyde-free low-cost polysaccharide adhesive and a preparation method thereof. The aldehyde-free low-cost polysaccharide adhesive is prepared from the following componentsin parts by weight: 20-25 parts of a main agent, 55-60 parts of dispersed medium water, 6-16 parts of a crosslinking agent, 1-2 parts of a reinforcing agent and 1-3 parts of a viscosity regulator. The preparation method of the polysaccharide-based adhesive comprises the following steps: firstly, all the components are weighed according to the weight ratio, the reinforcing agent and the dispersedmedium water are mixed, and ultrasonic dispersion is conducted for 15 minutes; then, the main agent is added into a prepared solution, and a mixed solution is homogenized for 15 minutes under the pressure of 70 MPa through a high-pressure homogenizer; and finally, the crosslinking agent and the viscosity regulator are added into a mixture obtained in the second step successively, and even stirringis conducted. The adhesive prepared through the simple preparation method has the advantages of high crosslinking density, good water-resistance performance, high dry and wet strength, adjustable viscosity, low curing temperature and the like, the practical requirements for a plywood adhesive are met, the production cost is low, the preparation process is simple, large-scale mass production can be conducted, and development of the environment-friendly high-performance adhesive industry is promoted advantageously.

Description

technical field [0001] The invention relates to the field of plywood preparation, in particular to an aldehyde-free and low-cost polysaccharide adhesive and a preparation method thereof. Background technique [0002] my country's wood-based panel production accounts for half of the world's total output, and it is the main source of furniture, flooring, and interior decoration materials. Every year, my country's plywood manufacturing consumes about 18 million tons of urea-formaldehyde resin and its modified product adhesives (solid content 50%), accounting for over 90% of the total output. Urea-formaldehyde resin adhesives have the problem of formaldehyde release from products. [0003] As people pay more attention to the health of the living environment, the use of biomass adhesives to fundamentally solve the problem of free formaldehyde release from wood-based panels has attracted much attention. However, most biomass adhesives have the problem of poor water resistance and ...

AI Technical Summary

Problems solved by technology

[0003] As people pay more attention to the health of the living environment, the use of biomass adhesives to fundamentally solve the problem of free formaldehyde release from wood-based panels has attracted much attention. However, most biomass adhesives have the problem of poor water resistance and bonding performance, which limits its industrial application

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