Epoxy Curing with 2,5-Bis(aminomethyl)tetrahydrofuran for High Tg
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Solution Overview
Problem
Existing curable compositions containing epoxy resins do not provide cured products with high enough glass transition temperatures for diverse applications.
Innovation Solution
A specific ratio of 2,5-bis(aminomethyl)tetrahydrofuran (H-AMF) is used as a curing agent in combination with epoxy resin, with a content ratio of X/Y (hydrogens bonded to nitrogens of amino groups to epoxy groups) ranging from 1.03 to 1.50, to achieve a high glass transition temperature in the cured product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional curing agents are used with epoxy resin, then the cured product achieves basic coating properties, but the glass transition temperature remains insufficient for high-performance applications
Solution Approach 1:
The invention changes the chemical parameters of the curing agent by using 2,5-bis(aminomethyl)tetrahydrofuran with a specifically controlled equivalent ratio (X/Y of 1.03 to 1.50). This parameter change in the curing agent's molecular structure and stoichiometry directly increases the glass transition temperature of the cured epoxy resin while maintaining proper curing characteristics and application versatility
Solution Approach 2:
The invention creates a composite curing system by combining 2,5-bis(aminomethyl)tetrahydrofuran with epoxy resin in a specific ratio. This composite material approach achieves synergistic effects where the particular amine structure complements the epoxy groups, resulting in a cured product with enhanced glass transition temperature while preserving the adaptability for various applications
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition forms a cured product with a glass transition temperature of 103°C or higher, offering improved heat resistance and versatility for various applications.
Implementation Method 1
Addition of a curing agent allows a crosslinking reaction via an epoxy group to proceed so as to produce a cured product insoluble or hardly soluble in various solvents and hardly melting
Data Source
AI summary
Provided are a composition capable of forming a cured product with a high glass transition temperature, a cured product of the composition, a method for manufacturing a cured product using the composition, and methods of manufacturing a molded body, a coating film, and a composition. The composition contains an epoxy resin and 2,5-bis(aminomethyl)tetrahydrofuran as a curing agent, the composition satisfying X/Y being more than 1 and 1.50 or less, where X is the number of hydrogens directly bonded to nitrogens of amino groups contained in 2,5-bis(aminomethyl)tetrahydrofuran in the composition, and Y is the number of functional groups of epoxy groups contained in the epoxy resin.