Hongsheng Technology (beijing) Co., Ltd

Runda Yan

Zhongda Duan

The present invention provides a preparation method of an oxidized anticoagulant starch adhesive, comprising the following steps: (1) an original starch and deionized water are mixed to form a starch emulsion, then the pH is adjusted to perform an oxidation reaction; a reductant is added to react with the unreacted oxidant, after the reaction is completed, an esterifying agent is added to perform an esterification reaction after adjusting pH; then a product is neutralized, washed, filtered and dried to obtain starch granules; and (2) a 40-50% starch emulsion is formulated by using the starch granules obtained in the step (1), the pH is adjusted to 6.5-7.5 after gelatinization, and dispersing agent, defoamer and water are added to form a starch adhesive. The esterifying agent used is composed of an anion and a cation, which significantly improves anticoagulant effect of the starch adhesive.

Preparation method of oxidized anticoagulant starch adhesive

The present disclosure relates to a modified environment-friendly corn starch adhesive, comprising the following components in parts by weight: 30 parts of corn starch, 300-400 parts of water, 0.2-3 parts of oxidant, and 80-120 parts of polyvinyl alcohol, 1-5 parts of cross-linking agent, 3-5 parts of calcium chloride, 0.1-3 parts of urea, 0.2-0.5 parts of defoamer, and an appropriate amount of sodium hydroxide (to adjust pH), the cross-linking agent is a modified boric acid cross-linking agent prepared by reacting boric acid with epichlorohydrin, water and citric acid at 80-100&#xb0; C. The surface of the modified boric acid cross-linking agent is bonded with a large number of epoxy groups and carboxyl groups, which can react with the carboxyl and aldehyde groups of the oxidized starch. These reactions can form synergistic effect with boric acid, which together improve the bonding efficiency and improve the adhesive strength of the colloid.

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Beijing, China

Runda Yan