A kind of aldehyde-free low-cost polysaccharide adhesive and preparation method thereof

Abstract

The invention discloses an aldehyde-free and low-cost polysaccharide adhesive and a preparation method thereof, comprising the following components by weight: 20-25 parts by weight of main agent, 55-60 parts by weight of dispersion medium water, and 6-16 parts by weight of crosslinking agent Parts by weight, 1-2 parts by weight of reinforcing agent, 1-3 parts by weight of viscosity regulator; its preparation method of polysaccharide-based adhesive comprises the steps of: first weighing each component according to the weight ratio, and mixing the reinforcing agent with the dispersion medium Mix with water and ultrasonically disperse for 15 minutes; then add the main ingredient to the above-prepared solution, pass the mixed solution through a high-pressure homogenizer, and homogenize it for 15 minutes under a pressure of 70 MPa; finally add the crosslinking agent and viscosity regulator successively In the mixture obtained in the second step, stir evenly; the adhesive prepared by the simple preparation method of the present invention has the advantages of high crosslinking density, good water resistance, high dry and wet strength, adjustable viscosity, and low curing temperature. It has met the practical requirements of plywood adhesives, has low production cost, simple preparation process, and can be mass-produced on a large scale, which will help promote the development of the green high-performance adhesive industry.

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 The total output of agent is more than 90%. 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 r...

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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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