Polyfunctional Thiol Curing Agent for Tack-Free Epoxy Resins
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Solution Overview
Problem
Existing thiol compounds used as curing agents for epoxy resins cause adhesion to fingers during curing, affecting the surface state of the cured product, and there is a demand for a compound that provides high elongation, low elasticity, and tack-free performance.
Innovation Solution
A polyfunctional thiol compound with specific structural features, represented by the general formula (I), is used as a curing agent for epoxy resins, ensuring rapid curing and producing a tack-free cured product with high elongation and low elasticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a bifunctional thiol compound with a long molecular chain is used as a curing agent for epoxy resins, then the cured product achieves high elongation and low elasticity with excellent impact resistance, but the surface of the cured product becomes tacky and adheres to fingers during curing
Solution Approach 1:
The patent applies parameter changes by modifying the molecular structure of the thiol compound - specifically using a bifunctional thiol compound with a long molecular chain (10-20 carbon atoms) and specific functional group arrangements. This structural parameter change enables the compound to achieve both high elongation/low elasticity properties and tack-free surface performance, resolving the contradiction between impact resistance and surface adhesion.
2Duration of action of moving object
If a polyfunctional thiol compound is used to achieve high elongation and low elasticity, then the cured product gains excellent impact resistance, but the curing process becomes slower and surface tackiness increases
Solution Approach 1:
The patent optimizes the functional group parameters of the thiol compound - specifically incorporating terminal thiol groups and carefully controlling the number and position of thiol groups along the molecular chain. This parameter optimization enables faster curing kinetics while maintaining high elongation properties, resolving the contradiction between elongation duration and curing speed.
Solution Approach 2:
The patent creates a composite molecular structure combining a long aliphatic chain with aromatic terminal groups and strategically positioned thiol groups. This composite structure provides both the flexibility needed for high elongation and the reactivity required for fast curing, simultaneously addressing both requirements.
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 thiol compound achieves rapid curing of epoxy resins while providing a cured product with good tack-free properties, high elongation, and excellent impact resistance.
Implementation Method 1
A compound having a specific thiol group, while being a polyfunctional thiol compound that develops high elongation and low elasticity, is effective as a curing agent or the like that provides a resin cured product having good tack-free performance
Data Source
AI summary
The present invention is to provide a novel thiol compound used for curing of epoxy resins, etc. Specifically, the present invention is to provide a compound represented by the general formula (I), a curing agent, and an epoxy resin composition containing the compound of the formula (I)