Modified starch adhesive and method for preparing same

A starch adhesive and modification technology, which is applied in the direction of starch-derived adhesives, adhesives, monocarboxylate copolymer adhesives, etc., can solve the problems of insignificant improvement of bond strength, poor fluidity of the system, and steric hindrance Increase and other problems, achieve significant water resistance shear strength, increase shear strength, and improve water resistance
CN102732186AInactive Publication Date: 2012-10-17EAST CHINA UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
EAST CHINA UNIV OF SCI & TECH
Publication Date
2012-10-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a modified starch adhesive and a method for preparing the same. The modified starch adhesive comprises the following components by weight: 30-50 parts of corn starch, 80-120 parts of deionized water, 25-40 parts of sodium hypochlorite solution, 0.5-2 parts of epichlorohydrin, 30-70 parts of polyvinyl acetate emulsion, 10-30 parts of epoxy resin, 2-7 parts of tertiary amine catalyst, 5-15 parts of filler, 0.2-1 part of surfactant, and 0.2-0.6 part of preservative, wherein the sodium hypochlorite solution serves as the oxidant, the polyvinyl acetate emulsion serves as the high-cohesive-energy reinforcement component, and the epoxy resin servers as the water-tolerant modified component. The method for preparing the modified starch adhesive comprises the following steps: mixing the oxidized starch emulsion prepared in advance, the polyvinyl acetate emulsion and the epoxy resin according to proportion uniformly, adding the catalyst, the filler and the preservative, and stirring quickly and uniformly. The modified starch adhesive disclosed by the invention has the advantages of high shear strength, high water-tolerant shear strength, moderate viscosity, good liquidity, moderate primary drying time, low cost and excellent integrated performance.
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Description

technical field

[0001] The invention relates to a modified starch adhesive and a preparation method thereof. It specifically relates to a new type of modified starch prepared by using oxidized starch emulsion as the main glue, polyvinyl acetate as the high cohesive energy reinforcing component, epoxy resin as the water resistance modifier, and adding stabilizers, fillers and preservatives. A starch adhesive belongs to the field of wood adhesive preparation. Background technique

[0002] my country is a big grain country with abundant cornstarch resources and low prices. As a modified component of classic adhesives, starch has long been used; as an adhesive, modified starch has also been widely used in the production of corrugated boxes. Starch is a homopolymer formed by the dehydration condensation of D-glucose monomer with a molecular weight of 10 6 ~10 7 Magnitude. C per glucose unit 2 、C 3 and C 6 Each starch has a hydroxyl group, so each starch molecular chain co...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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