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Low alkali bean powder adhesion agent

An adhesive, soybean flour technology, applied in the direction of adhesives, adhesive types, natural resin adhesives, etc., can solve the problems of high alkali corrosion, poor water resistance of soybean glue, etc., and achieve high bonding strength, good water resistance, Simple production process

Inactive Publication Date: 2007-02-14
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a low-alkali soybean powder adhesive with certain water resistance and greatly reduced alkali consumption in order to solve the problems of poor water resistance and high alkalinity and strong corrosion of the existing soybean gum

Method used

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  • Low alkali bean powder adhesion agent

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specific Embodiment approach 1

[0007] Specific embodiment one: the low-alkali soybean powder adhesive of the present embodiment is made of soybean powder, sodium hydroxide, calcium oxide and sodium silicate, wherein the weight-number ratio of each component is: soybean powder 100, sodium hydroxide 1.5 ~2, calcium oxide 2~5, sodium silicate 15~20, its preparation method is: (1) wetting and stirring: the bean flour is fully wetted with water, then add water and stir to make a uniform slurry; ( 2) Adding chemical reagents: mix according to the above ratio, and stir evenly; (3) Adjustment of concentration: According to the moisture content of the bonded materials and the bonding process, add an appropriate amount of water to adjust the concentration.

specific Embodiment approach 2

[0008] Specific embodiment two: present embodiment prepares low-alkali soybean flour adhesive through the following steps:

[0009] (1) Wetting and stirring: fully wet the bean flour with water twice the mass of the bean flour, then add water twice the mass of the bean flour and stir to make a uniform slurry.

[0010] (2) Adding chemical reagents: sodium hydroxide is made into a 30% solution, calcium oxide is made into a 1:4 lime emulsion, and sodium silicate is made into a 25% solution for later use. First, add lime emulsion with 10% weight of soybean powder into the slurry and stir for 5-10 minutes; then add sodium hydroxide with 2% weight of soybean powder and continue stirring for 5-10 minutes; finally add sodium silicate with 20% weight of soybean powder, and Stir well.

[0011] (3) Adjustment of concentration: according to the moisture content of the bonded material and the bonding process, add an appropriate amount of water to adjust the concentration.

specific Embodiment approach 3

[0012] Specific embodiment three: the difference between this embodiment and specific embodiment two is: in step (two), at first add milk of lime with 25% weight of bean flour, stir 5-10min; Then add the sodium hydroxide of 2% weight of bean flour , continue to stir for 5-10min; finally add 15% sodium silicate by weight of soybean powder and stir evenly.

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Abstract

The invention is a low-alkalinity bean powder adhesive for improving the existing bean flour adhesive, made from bean flour 100 shares, sodium hydroxide 1.5-2 shares, calcium oxide 2-5 shares and sodium silicate 15-20 shares. As compared with the existing techniques, the dosage of sodium hydroxide and sodium silicate in it is less, its alkalinity is low, and it reduces production cost and improves adhesiveness. And it can be used in veneer board production. And it has a certain water resistance, environmental-protection.

Description

technical field [0001] The present invention is an improvement to the existing bean flour adhesive. Background technique [0002] Soybean flour adhesive is a formaldehyde-free and environmentally friendly adhesive processed from defatted soybean flour. It can effectively utilize soybean processing residues, increase product added value, and increase farmers' income. Compared with the existing "aldehyde" adhesives, the wood-based panels bonded with it have no formaldehyde release during production and use, which is beneficial to environmental protection and harmless to the human body. Soybean gum was widely used in the early 20th century, but gradually declined due to the appearance of synthetic resins. In recent years, the oil crisis has intensified, prompting people to re-use renewable resources rationally and reduce dependence on petroleum products. Therefore, the research and application of natural adhesives have received more attention. The existing bean gum has low st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J193/00
Inventor 王伟宏张显权
Owner NORTHEAST FORESTRY UNIVERSITY
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