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Antibacterial and anti-mildew soybean adhesive for plywood

A soybean adhesive and plywood technology, applied in the direction of adhesives, adhesive types, protein adhesives, etc., can solve the problems of antibacterial and anti-mildew, low bonding strength, etc., to improve anti-bacterial and anti-mildew performance, improve bonding strength and Water resistance, effect of improving bonding performance

Pending Publication Date: 2021-03-19
临泉县四红木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, biomass adhesives have problems of water resistance, antibacterial and mildew resistance, and low bonding strength, which limit their widespread use.

Method used

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  • Antibacterial and anti-mildew soybean adhesive for plywood
  • Antibacterial and anti-mildew soybean adhesive for plywood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An antibacterial and anti-mildew soybean adhesive for plywood, its raw materials include by weight: 10g of soybean protein, 1g of composite curing agent, 0.25g of surfactant, 0.5g of polyvinyl alcohol, and 65g of water; wherein, the composite curing agent is ring Oxygen-modified chitosan quaternary ammonium salt and bisphenol A diglycidyl ether weight ratio are the mixture of 3:2;

[0025] In the preparation process of epoxy-modified chitosan quaternary ammonium salt, 5 g of 3-chloro-2-hydroxypropyltrimethylammonium chloride grafted chitosan was mixed with 20 ml of water, and then 1 g of ethylene glycol was added Mix diglycidyl ether and 0.1g triethylamine, heat up to 95°C, heat and stir for 2 hours, put the reaction solution into a dialysis bag with a molecular weight cut-off of 400Da, immerse in water, and replace with new water after 4 hours of dialysis, continue Dialyze for 12 hours; then replace with new water, continue dialysis for 12 hours to obtain a concentrate...

Embodiment 2

[0027] An antibacterial and anti-mildew soybean adhesive for plywood, its raw materials include by weight: soybean protein 10g, composite curing agent 1.2g, surfactant 0.15g, polyvinyl alcohol 0.7g, water 55g; wherein, composite curing agent is Epoxy modified chitosan quaternary ammonium salt and bisphenol A diglycidyl ether weight ratio is the mixture of 2:1;

[0028] In the preparation process of epoxy-modified chitosan quaternary ammonium salt, 5 g of 3-chloro-2-hydroxypropyltrimethylammonium chloride grafted chitosan was mixed with 20 ml of water, and then 0.8 g of ethylene glycol was added Alcohol diglycidyl ether and 0.16g triethylamine were mixed evenly, heated to 85°C, kept stirring for 3 hours, put the reaction liquid into a dialysis bag with a molecular weight cut-off of 400Da, immersed in water, and replaced with new water after dialysis for 4 hours. Continue dialysis for 12 hours; then replace new water, continue dialysis for 12 hours to obtain a concentrated solut...

Embodiment 3

[0030] An antibacterial and anti-mildew soybean adhesive for plywood, its raw materials include by weight: soybean protein 10g, composite curing agent 1.1g, surfactant 0.2g, polyvinyl alcohol 0.6g, water 60g; wherein, composite curing agent is Epoxy modified chitosan quaternary ammonium salt and bisphenol A diglycidyl ether weight ratio are the mixture of 3.5:2;

[0031] In the preparation process of epoxy-modified chitosan quaternary ammonium salt, 5 g of 3-chloro-2-hydroxypropyltrimethylammonium chloride grafted chitosan was mixed with 20 ml of water, and then 0.9 g of ethylene glycol was added Mix alcohol diglycidyl ether and 0.18g triethylamine, raise the temperature to 90°C, keep stirring for 2.5 hours, put the reaction solution into a dialysis bag with a molecular weight cut-off of 400Da, immerse in water, and replace with new water after 4 hours of dialysis , continue dialysis for 12 hours; then replace new water, continue dialysis for 12 hours to obtain a concentrated ...

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PUM

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Abstract

The invention discloses an antibacterial and anti-mildew soybean adhesive for plywood. The antibacterial and anti-mildew soybean adhesive is prepared from the following raw materials in parts by weight: 100 parts of soybean protein, 10-12 parts of a composite curing agent, 1.5-2.5 parts of a surfactant, 5-7 parts of polyvinyl alcohol and 550-650 parts of water; the composite curing agent is epoxymodified chitosan quaternary ammonium salt and bisphenol A diglycidyl ether. The antibacterial and mildew-resistant adhesive tape has good antibacterial and mildew-resistant performance and water-resistant bonding performance.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to an antibacterial and anti-mildew soybean adhesive for plywood. Background technique [0002] Plywood is a three-layer or multi-layer board-like material that is made of wood segments that are peeled into veneers or sliced ​​into thin wood, and then glued with adhesives. Usually, odd-numbered layers of veneers are used, and adjacent layers are The fiber directions of the veneers are glued perpendicular to each other. [0003] Adhesives commonly used in plywood are aldehyde adhesives, but aldehyde adhesives are easy to release formaldehyde, which is harmful to human health. With the improvement of people's awareness of environmental protection, formaldehyde-free and renewable biomass adhesives (such as soybean protein, starch, etc.) have become substitutes for aldehyde adhesives. However, biomass adhesives have the problems of water resistance, antibacterial and mildew resistan...

Claims

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Application Information

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IPC IPC(8): C09J189/00C09J11/06C09J11/08C08B37/08
CPCC08B37/003C08L2205/03C09J11/06C09J11/08C09J189/00C08L29/04C08L5/08C08K5/1515
Inventor 吴学磊
Owner 临泉县四红木业有限公司
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