Antibacterial and low-toxin modified corn starch powdery adhesive

Abstract

An antibacterial and low-toxic modified corn starch powdery adhesive, comprising the following components in parts by weight: 120-140 parts of corn starch, 6-10 parts of montmorillonite, 20-30 parts of casein, 22 parts of sodium acetate ‑24 parts, 3‑5 parts of hydrochloric acid, 7‑9 parts of crosslinking agent, 1‑3 parts of coupling agent, 7‑9 parts of defoaming agent, 25‑35 parts of composite preservative, 13‑17 parts of antibacterial agent, urea 18-22 parts, 17-25 parts of cetyltrimethylammonium bromide; the present invention also discloses a preparation method of an antibacterial and low-toxic modified corn starch powdery adhesive: first corn starch, compound Preservatives and organically modified montmorillonite are mixed evenly, then urea and casein are added for heating reaction to obtain mixture B, then dispersant, coupling agent and defoamer are added to obtain jelly C, and finally spray drying and centrifugation are carried out. Obtain powdery kudzu root starch adhesive. The invention has the characteristics of high bonding strength, water resistance, antibacterial, long environmental protection storage period, etc., effectively reduces the harm to the environment, reduces the production cost, and improves the production benefit of the enterprise.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to an antibacterial and low-toxic modified corn starch powder adhesive. Background technique [0002] Adhesives are the blood of my country's wood-based panel industry. As the largest country in the world's wood-based panel production, consumption, and import and export trade, China uses more than 6.5 million tons of adhesives for wood-based panel production in terms of solid content. Traditional glue The three main types are urea-formaldehyde resin adhesives, melamine-modified urea-formaldehyde resins and phenolic resins, which are three "aldehyde-based" synthetic resin adhesives. These adhesives generally have a certain amount of apron release, which endangers the health of consumers. . In order to reduce the defects of formaldehyde release from the above-mentioned adhesives, starch was used as the main raw material to prepare adhesives. Starch is a polysaccharide po...

AI Technical Summary

Problems solved by technology

Starch is a polysaccharide polymer formed by the interconnection of many glucose sacking units. It is usually granular and insoluble in water. It can swell or swell in cold water, and then shrink into granular shape after drying. After adding water and heating and gelatinizing starch, although it has Adhesive, but even if the concentration or solid content is very low, its viscosity will be very high, resulting in poor fluidity, easy gelation, and difficult sizing, etc.