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Alpha, omega end amino polyether used as epoxy resin curing agent and method for preparing the same

A technology of epoxy resin curing and amino-terminated polyether, which is applied in the α field, can solve the problems of difficult curing, long curing time, unfavorable large-area construction application and wide use, and achieves a wide range of applications

Inactive Publication Date: 2006-07-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

European Invention Patent EP0517167A2 and Chinese Invention Patent 031252443 respectively disclose that the use of aromatic amine polyether compounds as curing agents can significantly improve the flexibility and impact resistance of epoxy resin cured products, but they are difficult to cure or cure at room temperature It takes a long time, so it is not conducive to large-area construction application and wide use

Method used

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  • Alpha, omega end amino polyether used as epoxy resin curing agent and method for preparing the same
  • Alpha, omega end amino polyether used as epoxy resin curing agent and method for preparing the same
  • Alpha, omega end amino polyether used as epoxy resin curing agent and method for preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Add 0.05mol of polyethylene glycol and 0.6mL (0.01mol) of N,N-dimethylformamide (DMF) into a 100mL three-necked flask, heat up to 40°C with an oil bath while stirring, and then 8 mL (0.11 mol) of thionyl chloride was added dropwise within 10 min, and then the reaction was continued at 80° C. for 6 hours. SO produced during the reaction 2 , HCl gas is absorbed with lye. After the reaction solution was cooled, it was washed with saturated brine, the crude product was collected, dried with anhydrous potassium carbonate and adjusted to neutrality, and then the filtrate was collected by filtration to obtain chlorine-terminated polyethylene glycol.

[0015] In a 250ml three-necked flask, 0.1mol of hydroxybenzylamine, 0.4mol of NaOH and 0.84g of TBAB were mixed uniformly at room temperature, and then 0.05mol of chlorine-terminated polyethylene glycol was added. At the same time, the mixture was heated to 60° C. with an oil bath and stirred for 48 hours. After the...

Embodiment 2

[0016] Example 2: Add 0.05mol of polyethylene glycol and 0.15mL (0.0025mol) of N,N-dimethylformamide (DMF) into a 100mL three-necked flask, heat up to 40°C with an oil bath while stirring, and then 5.8 mL (0.08 mol) of thionyl chloride was added dropwise within 8 minutes, and then the reaction was continued at 60° C. for 30 hours. SO produced during the reaction 2 , HCl gas is absorbed with lye. After the reaction solution was cooled, it was washed with saturated brine, the crude product was collected, dried with anhydrous potassium carbonate and adjusted to neutrality, and then the filtrate was collected by filtration to obtain chlorine-terminated polyethylene glycol.

[0017] In a 250ml three-necked flask, 0.08mol of hydroxybenzylamine, 0.09mol of NaOH and 0.19g of TBAB were mixed uniformly at room temperature, and then 0.05mol of chlorine-terminated polyethylene glycol was added. Simultaneously, the mixture was heated to 50° C. with an oil bath and stirred for 4 hours. A...

Embodiment 3

[0018] Example 3: Add 0.05mol of polyethylene glycol and 1.5mL (0.025mol) of N,N-dimethylformamide (DMF) into a 100mL three-necked flask, heat up to 40°C with an oil bath while stirring, and then 14.5 mL (0.2 mol) of thionyl chloride was added dropwise within 15 min, and then the reaction was continued at 40° C. for 3 hours. SO produced during the reaction 2 , HCl gas is absorbed with lye. After the reaction solution was cooled, it was washed with saturated brine, the crude product was collected, dried with anhydrous potassium carbonate and adjusted to neutrality, and then the filtrate was collected by filtration to obtain chlorine-terminated polyethylene glycol.

[0019] In a 250ml three-necked flask, 0.15mol of hydroxybenzylamine, 0.6mol of NaOH and 1.9g of TBAB were uniformly mixed at room temperature, and then 0.05mol of chlorine-terminated polyethylene glycol was added. At the same time, the mixture was heated to 80° C. with an oil bath and stirred for 96 hours. After ...

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Abstract

The provided alpha, omega-end polyaminoether as the new curing agent for epoxy resins belongs to the compound with general formula as (1) (wherein, all m, x and y for integer, 10>=m>=2, 6>=x+y>=1 and n for repetitive unit of polyether chain segment)or the mixture with aromatic polyaminoether, contains substituents on ortho-, meta- or para-position of benzene ring, and has high strength and ductility and filling rate without toxin.

Description

technical field [0001] The invention relates to a class of α, ω-terminated amino polyether and a preparation method thereof, which is used as an adhesive system composed of an epoxy resin curing agent. Background technique [0002] As we all know, epoxy resin adhesives have the advantages of chemical corrosion resistance, wear resistance, electrical insulation and good bonding performance, and are widely used in the fields of machinery, electronics, aerospace and other fields; but the usual epoxy resin adhesives are brittle and tough. However, the disadvantages of poor peel strength, low cracking strain, and poor resistance to filler filling seriously hinder its further application development. Documents "Chemie" [1997, 245 (4270): 125-137] and "Polymer Engineering and Science" [1995, 35 (18): 379] toughen epoxy resins by modifying some amine curing agents. "China Adhesives" [2000, 9 (5): 10] proposed to introduce a certain rigid unit when desig...

Claims

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Application Information

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IPC IPC(8): C08G59/50C08G65/32C09J163/00
Inventor 官建国马会茹赵立英刘志华张清杰
Owner WUHAN UNIV OF TECH
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