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Curing agent for protein adhesive, and preparation method and application of curing agent

An adhesive and protein technology, which is applied to the curing agent of protein adhesive and the field of preparation thereof, can solve the problems of poor water resistance, can not completely get rid of formaldehyde release, etc., and achieves the effects of low cost, low production cost and convenient use.

Active Publication Date: 2012-04-04
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems of poor water resistance of existing protein adhesives and the inability to completely get rid of formaldehyde release, a curing agent for protein adhesives is provided

Method used

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  • Curing agent for protein adhesive, and preparation method and application of curing agent
  • Curing agent for protein adhesive, and preparation method and application of curing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Add 100g of water and 39.2g of tetraethylenepentamine (the compound of the formula II structure, wherein, n=3) in a 500mL three-necked flask, and then add 29.2g of adipic acid (the structure of the formula I, wherein, m= 4) To obtain the mixed solution, place the mixed solution in an oil bath at 190°C, and react for 90 minutes in the open mouth, stop the reaction, add 100g of water, stir evenly, and discharge the material to obtain a solution of water-soluble polymer polyamide polyamine, the solid content 44.2%;

[0042] 2) Add all the water-soluble polymer polyamide polyamine solution obtained in step 1) into a 2000mL three-necked flask, then add 1000g water and 15g maleic anhydride, stir at 20°C for 10min, then add dropwise 120mL 1mol / L NaOH aqueous solution, stirred at 20°C for 5 minutes to obtain a curing agent for the protein adhesive, then added 400 g of defatted soy flour (Guangzhou Haisha Biotechnology Co., Ltd., protein weight percentage 50%), stirred for 10...

Embodiment 2

[0045] 1) Add 100g of water and 43.5g of polyethylene polyamine (formula III structure, chemically pure, purchased from Sinopharm Chemical Reagent Co., Ltd., with a molecular weight of 232.38, -NH 2 Functionality is calculated as 2), then add 22.2g of adipic acid (formula I structure, wherein, m=4) to obtain a mixed solution, put the mixed solution in an oil bath at 180°C, and react for 100min, stop the reaction, add 100g of water, stirred evenly, and discharged to obtain a solution of water-soluble polymer polyamide polyamine, with a solid content of 42.3%;

[0046] 2) Add all the water-soluble polymer polyamide polyamine solution obtained in step 1) into a 2000mL three-necked flask, then add 1000g water and 15g maleic anhydride, stir at 25°C for 10min, then add dropwise 120mL 1mol / L NaOH aqueous solution, stirred at 25°C for 5 minutes to obtain a curing agent for the protein adhesive, then added 400 g of defatted soy flour (Guangzhou Haisha Biotechnology Co., Ltd., protein w...

Embodiment 3

[0049] 1) Add 100g of water and 43g of polyethylene polyamine (formula III structure, chemically pure, purchased from Sinopharm Chemical Reagent Co., Ltd., molecular weight 232.38, -NH 2 Functionality is calculated as 2), then add 25g of adipic acid (formula I structure, wherein, m=4) to obtain a mixed solution, place the mixed solution in an oil bath at 170°C, and react for 110min, stop the reaction, add 100g water, stirred evenly, and discharged to obtain a solution of water-soluble polymer polyamide polyamine with a solid content of 44%.

[0050] 2) Add all the polymer polyamide polyamine solution obtained in step 1) into a 2000mL three-necked flask, then add 1000g of water and 20g of maleic anhydride, stir at 35°C for 10min, then add dropwise 90mL of 1mol / L NaOH aqueous solution , stirred at 35°C for 5 minutes to obtain a curing agent for the protein adhesive, then added 400 g of defatted soybean flour (Guangzhou Haisha Biotechnology Co., Ltd., protein weight percentage 50...

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Abstract

The invention discloses a preparation method for a curing agent for a protein adhesive. The preparation method comprises the following steps of: mixing acid and amine in water; performing first reaction to obtain a water-soluble high molecular solution; and performing second reaction on the water-soluble high molecular solution and anhydride to obtain the curing agent for the protein adhesive. The curing agent for the protein adhesive, which is prepared by the method, is a water-soluble system, is environment-friendly, has high compatibility with the protein adhesive and can achieve the idealcuring effect with small using amount, and the solid content of the curing agent can be regulated according to the requirement. The curing agent for the protein adhesive can be applied to the preparation of a soybean protein adhesive. The prepared soybean protein adhesive is convenient to use and has high bonding strength and water tolerance. In the prepared wood gluing product, formaldehyde release is avoided, and the type II wet strength is more than 0.7 MPa; the wood gluing product has potential of replacing urea-formaldehyde glue; and further popularization and utilization are facilitated.

Description

technical field [0001] The invention relates to the field of curing agents, in particular to a curing agent for protein adhesives and its preparation method and application. Background technique [0002] The industry with the largest demand for adhesives in my country is the wood processing industry. The annual consumption of adhesives in the wood processing industry accounts for about 60% of the total adhesive dosage. The wood adhesives on the market are mainly "trialdehyde glue" (urea-formaldehyde glue, phenolic glue, melamine-formaldehyde glue). The raw materials of "trialdehyde glue" come from petroleum and other chemical products, and the resources are limited and non-renewable; in addition, "trialdehyde glue" products will release the first type of carcinogen free aldehyde during the production and use process, which is easy to cause people's breathing. Discomfort and pain in the eyes and throat seriously endanger the health of industrial workers and consumers. The Fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J11/08C09J11/06C09J189/00C08G69/28
Inventor 桂成胜朱锦刘小青
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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