New-type wood adhesive and preparation method thereof

Abstract

The invention belongs to the technical field of new materials, and particularly relates to a new-type wood adhesive and a preparation method thereof. The new-type wood adhesive is formed by a main adhesive and a cross-linking agent, wherein the main adhesive comprises the following raw materials in parts by weight: 12-16 parts of polyether glycol, 20-25 parts of silica sol, 8-12 parts of polyvinylalcohol, 0.2-0.4 parts of propylene glycol, 4-6 parts of polymerized diphenylmethane diisocyanate, 0.04-0.06 parts of polyacrylamide, 0.12-0.16 parts of dibutyltin dilaurate, 0.05-0.2 parts of a surfactant, 0.05-0.15 parts of a defoamer, 0.1-0.2 parts of a preservative, 8-15 parts of filler and 50-65 parts of water; and the cross-linking agent is formed by the following raw materials in parts byweight: 6-8 parts of vegetable oil, 20-30 parts of polyol benzoate and 65-75 parts of isocyanate. The preparation method is capable of using glycerinum as an initiator for preparing the polyether glycol, and using the polyether glycol as the raw material for preparing the new-type wood adhesive. The prepared new-type wood adhesive has the characteristics of high bonding strength, short curing time, good water resistance and weather resistance and environment-friendliness, and has a value of large-scale promotion.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a novel wood adhesive and a preparation method thereof. Background technique [0002] Wood adhesive is a material that glues wood and the surface of wood or other objects into one. Wood adhesives mainly include amino resin adhesives, urea-based adhesives, phenol-formaldehyde-based adhesives, and phenolic resins. Class adhesives, hot melt adhesives, protein glue, blood glue and other adhesives. Urea-formaldehyde-based adhesives and phenol-formaldehyde-based adhesives are widely used in fields such as wood bonding, foundry bonding, and paper bonding due to their good bonding properties, but such adhesives are easily hydrolyzed, especially In an environment with periodic changes in conditions such as temperature, humidity, and stress, it is very easy to lose bond strength and cause bond failure. A urea-formaldehyde resin adhesive disclosed by a Chinese invention p...

AI Technical Summary

Problems solved by technology

Traditional polyurethane is prepared by the reaction of polyols and isocyanates. Most of these raw materials are petrochemical products, which are non-renewable resources. To meet the requirements of environmental protection, non-toxic and renewable, it is necessary to find renewable raw materials to prepare polyols and isocyanates. Due to the selection of isocyanates Due to the narrowness of the market, we can only find new raw materials around renewable polyols