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Mercaptolation PAE resin cross-linking agent, modified protein adhesive and preparation method of modified protein adhesive

A technology of resin crosslinking agent and modifier, which is applied in the field of mercaptolated PAE resin crosslinking agent and modified protein adhesive and its preparation, can solve the problems of poor practical applicability, time-consuming and laborious, complicated process, etc. Achieve important economic and social benefits, simple and easy process, and improved water-resistant bonding strength

Active Publication Date: 2022-04-05
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of increasing the content of sulfhydryl groups by adjusting the types of amino acids inside soybean protein molecules is complex, time-consuming and laborious, and has little practical applicability. Its internal cross-linking structure has become a key direction to improve its bonding performance and narrow the gap with market-leading resin products

Method used

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  • Mercaptolation PAE resin cross-linking agent, modified protein adhesive and preparation method of modified protein adhesive
  • Mercaptolation PAE resin cross-linking agent, modified protein adhesive and preparation method of modified protein adhesive
  • Mercaptolation PAE resin cross-linking agent, modified protein adhesive and preparation method of modified protein adhesive

Examples

Experimental program
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Effect test

Embodiment 1

[0049] A mercaptolated PAE resin cross-linking agent is made from raw materials comprising the following qualities:

[0050]

[0051] The preparation method of above-mentioned mercaptolated PAE resin cross-linking agent comprises:

[0052] (1) Preparation of polyamide polyamine intermediate: Add 16Kg of adipic acid and 15Kg of diethylenetriamine into the reaction kettle, and stir for 30min at 50°C until the raw materials are completely mixed. Raise the temperature to the predetermined reaction temperature of 160°C, and keep the temperature for 3-5 hours to evaporate the water in the solution. After the water is completely evaporated, stop heating immediately.

[0053] (2) Preparation of -SH group-terminated prepolymer: Dissolve 5Kg of mercaptoethylamine in a certain proportion of water, after the synthesis of the above-mentioned polyamide polyamine intermediate stops heating, cool down to about 80°C, add mercaptoethylamine Aqueous solution, adjust the solid content to 30w...

Embodiment 2

[0061] A mercaptolated PAE resin cross-linking agent is made from raw materials comprising the following qualities:

[0062]

[0063]

[0064] The preparation method of above-mentioned mercaptolated PAE resin cross-linking agent comprises:

[0065] (1) Preparation of polyamide polyamine intermediate: Add 15kg of adipic acid and 20kg of diethylenetriamine into the reaction kettle, and stir for 30min at 50°C until the raw materials are completely mixed. Raise the temperature to the predetermined reaction temperature, preferably 160°C, and keep the temperature for 3-5 hours to evaporate the water in the solution. After the water is completely evaporated, stop heating immediately.

[0066] (2) Preparation of -SH group-terminated prepolymer: Dissolve 5Kg of mercaptopropionic acid in a certain proportion of water, after the synthesis of the above-mentioned polyamide polyamine intermediate stops heating, cool down to about 80°C, and add mercaptopropionic acid Aqueous solution...

Embodiment 3

[0074] A mercaptolated PAE resin cross-linking agent is made from raw materials comprising the following qualities:

[0075]

[0076] This embodiment also provides the preparation method of this mercaptolated PAE resin crosslinking agent, comprising:

[0077] (1) Preparation of polyamide polyamine intermediate: Add 15kg of adipic acid and 20kg of diethylenetriamine into the reaction kettle, and stir for 30min at 50°C until the raw materials are completely mixed. Raise the temperature to the predetermined reaction temperature, preferably 160°C, and keep the temperature for 3-5 hours to evaporate the water in the solution. After the water is completely evaporated, stop heating immediately.

[0078] (2) Preparation of -SH group-terminated prepolymer: Dissolve 5Kg of β-mercaptoethanol in a certain proportion of water, after the synthesis of the above-mentioned polyamide polyamine intermediate stops heating, cool down to about 80°C, add β- The mercaptoethanol aqueous solution ...

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Abstract

The invention relates to a sulfhydrylated PAE resin cross-linking agent, a modified protein adhesive and a preparation method of the modified protein adhesive, and belongs to the technical field of adhesive preparation. The thiolated PAE resin cross-linking agent is prepared from the following raw materials in parts by weight: 100 parts of water; 15-30 parts of adipic acid; 15 to 30 parts of diethylenetriamine; 15 to 30 parts of epoxy chloropropane; 5-10 parts of a modifier; wherein the modifying agent is one or a mixture of more of mercaptoethylamine, beta-mercaptoethanol, mercaptopropionic acid, dithiothreitol and cysteine. The main chain of a prepolymer of the cross-linking agent is terminated by a high-reaction-activity group-SH, so that a cross-linking system in modified soybean glue is enriched and a dense water-insoluble three-dimensional network is formed by constructing disulfide bonds and hydrogen bonds between the-SH and soybean protein molecules, the solid content of the prepared soybean protein adhesive is increased, and the soybean protein adhesive has a good water-soluble property. The water-resistant bonding strength is obviously improved, and the national standard requirements are met.

Description

technical field [0001] The invention relates to the technical field of adhesive preparation, and specifically provides a mercaptolated PAE resin crosslinking agent, a modified protein adhesive and a preparation method thereof. Background technique [0002] Adhesives are widely used in the plywood production industry, and play a vital role in determining the mechanical strength and performance of plywood products. However, due to its low cost and excellent bonding performance, "trialdehyde glue" dominates plywood Major markets for adhesives. However, the products bonded by this type of adhesive will continuously release formaldehyde and some other volatile harmful substances, which will cause carcinogenicity and chronic poisoning to the human body, and will also cause a series of environmental pollution problems. Market demand is increasingly inclined to use low-toxic, sustainable and environmentally friendly adhesives to replace aldehyde adhesives. [0003] In my country, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/48C08G69/26C08G69/28C09J189/00C09J177/06
Inventor 张世锋严倩金太权
Owner BEIJING FORESTRY UNIVERSITY
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