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High-molecular composite adhesive, and preparation method and application thereof

A composite adhesive and polymer technology, applied in the direction of adhesives, adhesive types, chemical instruments and methods, etc., can solve the problems of poor fluidity, poor water resistance, high viscosity, etc., to reduce molecular weight, increase bonding strength, and broaden applications field effect

Inactive Publication Date: 2014-09-10
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, generally speaking, soybean adhesives have high cost, high viscosity, and poor fluidity. In addition, the strength and water resistance of soybean protein have been improved by modification, but there is still a gap compared with petroleum-based adhesives.
The wood adhesive prepared from starch is green and environmentally friendly, but it also has the characteristics of poor water resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of plant-based polyester polyol

[0041] Into 200g of ethylene glycol, under stirring, add 30g of rice straw powder below 10 mesh and 4g of sulfuric acid, after blending evenly, heat to 180°C and keep warm for 30min; then add 30g of rice straw powder below 10 mesh, Continue to keep warm at 160°C for 90 minutes to prepare plant-based polyols; add 40 g of glutaric anhydride and keep warm at 150°C for 30 minutes; raise the temperature to 190°C and keep warm for 150 minutes; cool to normal temperature to prepare plant-based polyester polyols;

[0042] The glycol is selected from one of the following: ethylene glycol, propylene glycol, butanediol, neopentyl glycol, diethylene glycol, triethylene glycol;

[0043] The rice straw powder has a particle size of less than 10 mesh and a water content mass fraction of less than 1%;

[0044] (2) Preparation of polymer composite water emulsion

[0045] Add 1g of konjac flour to 200g of water, 30 o C was stirred for ...

Embodiment 2

[0049] (1) Preparation of plant-based polyester polyol

[0050] To 300g of butanediol, under stirring, add 60g of rice straw powder below 10 mesh and 9g of p-toluenesulfonic acid, after blending evenly, heat to 170°C and keep it warm for 30min; then add rice straw below 10 mesh Powder 60g, keep warm at 170°C for 75min to prepare plant-based polyol; add 75g of glutaric anhydride, keep warm at 150°C for 30min; raise the temperature to 200°C, keep warm for 135min; alcohol;

[0051] The glycol is selected from one of the following: ethylene glycol, propylene glycol, butanediol, neopentyl glycol, diethylene glycol, triethylene glycol;

[0052] The rice straw powder has a particle size of less than 10 mesh and a water content mass fraction of less than 1%;

[0053] (2) Preparation of polymer composite water emulsion

[0054] The konjac flour of 2.1g is added to the water of 300g, 35 o C was stirred for 25 minutes to make it swell, and the pH was adjusted to 9 with a 5% NaOH aque...

Embodiment 3

[0058] (1) Preparation of plant-based polyester polyol

[0059] To 300g of ethylene glycol, under stirring, add 51g of rice straw powder below 10 mesh and 7.5g of benzenesulfonic acid, after blending evenly, heat to 175°C and keep warm for 30min; then add rice straw below 10 mesh Powder 51g, continue to keep warm at 180°C for 60min to obtain plant-based polyol; add 90g of glutaric anhydride, keep warm at 150°C for 30min; raise the temperature to 210°C, keep warm for 120min; alcohol;

[0060] The glycol is selected from one of the following: ethylene glycol, propylene glycol, butanediol, neopentyl glycol, diethylene glycol, triethylene glycol;

[0061] The rice straw powder has a particle size of less than 10 mesh and a water content mass fraction of less than 1%;

[0062] The catalyst is selected from one of the following: hydrochloric acid, sulfuric acid, p-toluenesulfonic acid, benzenesulfonic acid;

[0063] (2) Preparation of polymer composite water emulsion

[0064] Th...

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Abstract

The invention relates to a polymer composite adhesive and its preparation method and application, and belongs to the technical fields of chemical adhesives, resource recycling and composite materials. Plant-based polyester polyol is prepared by using agricultural residues of rice straw, diol, catalyst, and dianhydride; then blending the plant-based polyester polyol with konjac glucomannan aqueous emulsion to obtain a polymer composite aqueous emulsion , When in use, mix the separately packaged polymer composite water emulsion with isocyanate at room temperature to obtain a polymer composite adhesive. The adhesive of the present invention is used for bonding wood.

Description

technical field [0001] The invention relates to a polymer composite adhesive and its preparation method and application, and belongs to the technical fields of chemical adhesives, resource recycling and composite materials. Background technique [0002] At present, the leading adhesives in the wood adhesive industry are urea-formaldehyde resins, phenolic resins and melamine-formaldehyde resins. At present, the market demand for formaldehyde-free wood adhesives is increasing. Therefore, it is of great significance to research and develop green wood adhesives prepared from natural biomass polymers. [0003] The use of natural biomass polymers to prepare wood adhesives has been reported. For example, the patent application number 201010550481.5 discloses a preparation method of a soybean protein adhesive. The steps are to add soybean protein and water into a reaction vessel, and then add urea, sodium dodecylbenzenesulfonate and 2 -Mercaptoethanol, at room temperature, to prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C08G63/12C08B37/02B27D1/04B32B37/12
Inventor 王志玲黄晓丽崔恩峰李海芳田亮韩同前
Owner UNIV OF JINAN
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