Production method of starch-based non-formaldehyde adhesive for bamboo-wood glued laminated timber splice plates

Abstract

The invention relates to a production method of a starch-based non-formaldehyde adhesive for bamboo-wood material. The production method comprises the following steps: by taking starch as a main material, further using styrene, a potassium persulfate water solution, sodium dodecylbenzenesulfonate, an ammonium persulfate water solution, vinyl acetate, methyl methacrylate, silicon sol, urea and tributyl phosphate as raw materials, by taking a NaOH water solution as a pH regulator, and performing four steps, namely preparation of an oxidized starch emulsion, acidification, grafting reaction of oxidized starch and cross-linking reaction to produce the starch-based non-formaldehyde adhesive. The starch-based non-formaldehyde adhesive is used as the adhesive for the bamboo-wood material, in particular to engineered wood; and the production method has the advantages of simple process, low cost, mild reaction conditions and easiness in control, and the produced adhesive has the advantages of no release of free formaldehyde, high storage stability, strong water resistance and high binding strength in comparison with a starch adhesive produced by the prior art.

Description

technical field [0001] The invention relates to a production method of glue for bamboo-wood laminated boards, in particular to a production method of a free aldehyde-free adhesive which is suitable for scientific and technological wood and uses starch as a base material. Background technique [0002] my country is a country with insufficient forest resources. In order to alleviate the problem of insufficient wood supply, the wood-based panel industry has developed rapidly, which has promoted the rapid development of wood adhesive production. At present, there are two obvious trends in my country's wood adhesive industry: one is that due to the rise in the price of petrochemical raw materials such as phenol, the market for phenolic resins has shrunk, while the proportion of urea-formaldehyde adhesives is increasing, and the problem of formaldehyde hazards has therefore become more prominent; Second, the market demand for environmentally friendly wood-based panels is booming, w...

AI Technical Summary

Problems solved by technology

[0005] After retrieval, in the production method of glued board glue, there are the following two relatively close comparison materials, one is "a kind of glued wood glued board glue and its preparation method" (CN101565593B) using two-component adhesive, the curing agent is isocyanate, And it is 13%-17% of the weight part of the main agent, the production cost is high, and the operation is difficult

The other one is "A One-Component Plywood Adhesive and Its Preparation Method" (CN102863927A), which does not contain starch and uses vinyl tertiary carbonate as a reinforcing agent, so the production cost is high