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

A production method and glulam technology, applied in the direction of adhesives, grafted polymer adhesives, adhesive types, etc., can solve the problems of high production cost and difficult operation, and achieve low cost, simple production process, and accelerated production The effect of the process

Inactive Publication Date: 2013-06-05
ZHEJIANG FORESTRY UNIVERSITY
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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% o

Method used

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Embodiment Construction

[0014] The present invention is described in detail below in conjunction with embodiment: the raw material of each reactant in the application is single value, so unique embodiment is exactly the best embodiment.

[0015] The production method of the starch-based formaldehyde-free glue for the glulam panel is followed by the following steps:

[0016] (1) Preparation of oxidized starch emulsion: add 80 kilograms of oxidized starch and 400 kilograms of water in the reactor, stir into starch emulsion;

[0017] (2) Acidification of oxidized starch emulsion: adjust the pH to 2-3 with a mass ratio of 10% hydrochloric acid aqueous solution, mix and stir for 10 minutes, heat up to 60°C, and react for 40 minutes;

[0018] (3) Grafting reaction of oxidized starch: drip 40kg methyl methacrylate, 20kg styrene, add 2.5kg mass ratio after stirring for 1 hour and be 10% potassium persulfate aqueous solution, insulation reaction 1 hour;

[0019] (4) the cross-linking reaction of oxidized sta...

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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...

Claims

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Application Information

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IPC IPC(8): C09J151/02C09J11/04C09J11/06C08F285/00C08F251/00
Inventor 刘志坤于红卫方群沈哲红鲍滨福罗从军
Owner ZHEJIANG FORESTRY UNIVERSITY
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