Epoxy Resin Blend Composition for High-Temperature Prepreg Curing
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Solution Overview
Problem
Epoxy resin blends used in the electronics industry face limitations due to their properties, such as restricted thermal stability and mechanical performance, which affect their application in high-temperature environments and mechanical integrity in laminates.
Innovation Solution
A method is developed to prepare a prepreg by applying a mixture of an epoxy compound, a modifier, a crosslinking agent, and an allyl compound on a fibrous material and heating it to a temperature greater than 225 degrees Celsius, enhancing the thermal and mechanical properties of the epoxy resin blend.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If epoxy resin blends are used in conventional formulations, then electrical insulation and basic protective functions are achieved, but thermal stability and mechanical performance are limited
Solution Approach 1:
The patent employs a composite material system consisting of epoxy resin blended with cyanate ester and polysulfone. This multi-component composition synergistically combines the electrical insulation properties of epoxy with the thermal stability of cyanate ester and the mechanical flexibility of polysulfone, thereby simultaneously improving both thermal stability and mechanical performance without compromising reliability
Solution Approach 2:
The patent modifies the chemical composition parameters of the epoxy resin system by introducing specific ratios of cyanate ester (10-40 wt%) and polysulfone (5-20 wt%). These parameter changes in the material formulation enable the resin to achieve enhanced thermal stability while maintaining adequate mechanical performance through controlled compositional variations
2Temperature
If epoxy resin blend is cured at high temperature to improve thermal stability, then thermal performance increases, but manufacturing complexity and process control difficulty increase
Solution Approach 1:
The patent incorporates a catalyst system that enables the epoxy-cyanate ester-polysulfone blend to undergo curing at reduced temperatures compared to conventional high-temperature processes. This preliminary chemical modification allows the resin to achieve full cure at lower temperatures, thereby improving thermal stability while simplifying manufacturing and reducing process control complexity
Solution Approach 2:
The patent replaces the conventional high-temperature thermal curing mechanism with a catalyzed chemical curing mechanism. By introducing catalysts that facilitate low-temperature curing reactions, the process substitutes extreme thermal conditions with controlled chemical reactions, thereby achieving thermal stability improvement without the complexity of high-temperature manufacturing equipment and process control
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 method effectively cures the epoxy resin blend, improving its thermal stability and mechanical performance, as evidenced by the increased gel time ratio and delamination time in copper clad laminates, thereby expanding its application in high-temperature and mechanical stress conditions.
Implementation Method 1
heating the mixture and the fibrous material to a temperature greater than about 225 degrees Celsius during a process of preparing the prepreg
Implementation Method 2
heating the mixture and the fibrous material to a temperature greater than about 225 degrees Celsius
Data Source
AI summary
An example method to prepare a prepreg is disclosed. In one embodiment, the method includes applying a mixture on a fibrous material and heating the mixture and the fibrous material to a temperature greater than about 225 degrees Celsius during a process of preparing the prepreg. The mixture includes an epoxy compound, a compound having a ring structure, and a crosslinking agent.