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Environment-friendly adhesive and preparation method thereof

A technology of adhesives and compound adhesives, which is applied in the direction of adhesives, adhesive types, polysaccharide adhesives, etc., can solve the problems of low bonding strength and high free formaldehyde, achieve excellent oxidation resistance, change adhesion performance, The effect of good heat resistance

Pending Publication Date: 2019-08-30
陈光辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an environmentally friendly adhesive and its preparation method in view of the problems of more free formaldehyde and low bonding strength of the current adhesive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The preparation method of the modified active agent is:

[0023] (1) Take nanocellulose and add deionized water at a mass ratio of 1~5:80~100, ultrasonicate for 50~60min, add sodium periodate with a mass of 70~80% of nanocellulose, and stir and mix at 30~50℃ for 1 ~3h, adjust the pH to 6.5~7, filter, take the filter residue and wash it with deionized water to obtain washings, take the washings and add glycerol in a mass ratio of 1~4:10~15, stir and mix for 30~50min, filter, Take the filter residue a by rotary evaporation and dry to obtain a dry matter;

[0024] (2) Take the amine additive and add tetrahydrofuran in a mass ratio of 1~3:10~15, stir and mix for 20~30min, add 80~95% phthalic anhydride of the amine additive mass, and stir and mix at 40~50℃ for 40~60min, Then heat up to 140~150℃, stir and mix for 2~5h, cool to room temperature, and distill under reduced pressure to obtain a vacuum distillate. Take the vacuum distillate and add deionized water at a mass ratio...

Embodiment 1

[0033] The amine additive is: take diethylenetriamine and add polyethylenepolyamine in a mass ratio of 2:3 to mix.

[0034] The preparation method of modified active agent is:

[0035] (1) Take nanocellulose and add deionized water at a mass ratio of 1:80, sonicate for 50 minutes, add sodium periodate with 70% nanocellulose mass, stir and mix at 30°C for 1 hour, adjust the pH to 6.5, filter, and take the filter residue Wash with deionized water to obtain the washings, take the washings and add glycerin at a mass ratio of 1:10, stir and mix for 30 minutes, filter, take the filter residue a and rotary evaporate, dry to obtain the dry matter;

[0036] (2) Take the amine additive and add tetrahydrofuran at a mass ratio of 1:10, stir and mix for 20 minutes, add phthalic anhydride with 80% of the mass of the amine additive, stir and mix at 40°C for 40 minutes, then raise the temperature to 140°C, stir and mix for 2 hours, and cool to room temperature. Distill under reduced pressure...

Embodiment 2

[0045] The amine additive is: take diethylenetriamine and add polyethylenepolyamine in a mass ratio of 5:7 to mix.

[0046] The preparation method of modified active agent is:

[0047] (1) Take nanocellulose and add deionized water at a mass ratio of 5:100, sonicate for 60 minutes, add sodium periodate with 80% nanocellulose mass, stir and mix at 50°C for 1~3h, adjust pH to 7, filter, Take the filter residue and wash it with deionized water to obtain the washings, add glycerol to the washings at a mass ratio of 4:15, stir and mix for 50 minutes, filter, take the filter residue a and rotary evaporate, dry to obtain the dry matter;

[0048] (2) Take the amine additive and add tetrahydrofuran at a mass ratio of 3:15, stir and mix for 30 minutes, add phthalic anhydride with 95% of the mass of the amine additive, stir and mix at 50°C for 60 minutes, then raise the temperature to 150°C, stir and mix for 5 hours, and cool to room temperature. Distill under reduced pressure to obtain...

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PUM

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Abstract

The invention discloses an environment-friendly adhesive and a preparation method thereof, and belongs to the technical field of adhesives. According to the adhesive prepared by the preparation methoddisclosed by the invention, liquidity of the adhesive in a using process is improved; through nucleophilic addition of polyvinyl alcohol and furfural, the bonding strength of the obtained substancesis improved, and a bonding network structure is formed; free aldehyde groups are reduced, and the aldehyde groups are bound to the network structure, so that the aldehyde groups are not diffused easily to harm a human body. An added modified active agent changes adhesion performance of the adhesive, and a formed adhesive film has relatively good tear resistance and impact resistance, so that usability of the adhesive is enhanced. According to a prepared cross-linking additive, active substances are improved and stored in the adhesive network structure, so that harmful substances are preventedfrom escaping, and overall performance of the adhesive is improved. Elasticity of the adhesive is improved by xanthan gum, carrageenan and the like, so that shrinkage and cracking are reduced, and good film-forming strength is kept. The adhesive disclosed by the invention solves the problems of large amount of free formaldehyde and low bonding strength in existing adhesives.

Description

technical field [0001] The invention relates to the technical field of adhesives, and more particularly to an environment-friendly adhesive and a preparation method thereof. Background technique [0002] Adhesive bonding (bonding, bonding, gluing, gluing) refers to the technology in which the surfaces of homogenous or dissimilar objects are joined together with adhesives, which have the characteristics of continuous stress distribution, light weight, or sealing, and most process temperatures are low. Adhesive bonding is especially suitable for the connection of different materials, different thicknesses, ultra-thin specifications and complex components. Adhesives are developing the fastest in recent generations, have a wide range of application industries, and have a significant impact on the progress of high-tech science and technology and the improvement of people's daily life. Therefore, research, development and production of various types of adhesives are very importan...

Claims

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Application Information

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IPC IPC(8): C09J129/04C09J103/10C09J105/02C09J105/00C09J101/08C09J11/06
CPCC08L2205/025C08L2205/035C08L2312/00C09J11/06C09J129/04C08L3/10C08L5/02C08L5/00C08L1/08C08K5/29
Inventor 陈光辉
Owner 陈光辉
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