Wood substance material adhesion agent manufactured with corn starch as main material and manufacturing method thereof

Abstract

The invention relates to a wood material adhesive which takes corn starch as main material and the preparation method thereof and belongs to the adhesive technical filed. The adhesive consists of the following components with different weight proportion: cornstarch, mixture of dicarboxyl and acetic anhydride, polyvinyl alcohol, metallic oxide, rubber latex and water. The procedure of the invention is as follows: adding water to cornstarch and stirring; then adding the mixture of dicarboxyl and acetic anhydride and stirring; then adjusting PH value, heating up, adjusting PH value and reducing temperature to obtain cross bonding cornstarch; putting the polyvinyl alcohol into water, heating up, reducing temperature, adding the cross bonding cornstarch; heating up, stirring, reducing temperature, adding rubber latex and metallic oxide and stirring at last to obtain the adhesive. The adhesive and the preparation method have the advantages of high strenghth, good water resistance, long storage life, simple fabrication technology, low cost, no pollution and wide application range. The invention can be used for the cementation of various wood materials including density boards, glued boards, laminated wood boards and decorated boards.

Description

technical field [0001] The invention belongs to adhesives, and mainly relates to a woody material adhesive with cornstarch as the main raw material and a manufacturing process thereof. Background technique [0002] Due to the inherent defects of starch, such as low bonding strength, poor moisture resistance, low initial adhesion, and slow drying speed, in the wood adhesive industry, few researchers use starch as a raw material to develop wood adhesives. Most of the research is only in wood adhesives. A small amount of starch is directly added to wood adhesives such as urea-formaldehyde resin, white latex and isocyanate adhesives to improve the comprehensive performance of urea-formaldehyde resins, white latex and isocyanate adhesives. Shen Jucai and others use oxidized starch and 10% polyvinyl alcohol After the aqueous solution is mixed evenly, it is mixed with polyvinyl acetate emulsion to improve the initial adhesive strength of the emulsion; Xu Jun et al. use a small amou...

AI Technical Summary

Problems solved by technology

The above-mentioned research or invention is of positive significance to the research of starch adhesives, but in the above-mentioned adhesives, there may be adhesive properties that need to be improved, or the preparation process and quality control are relatively complicated, or the cost is still relatively high. Therefore, starch-based wood material adhesives are currently It has not been widely used, and in-depth research is still of great significance