Polyarylate Epoxy Cyanate Ester Curing Composition
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Solution Overview
Problem
Existing resin compositions, such as those described in Japanese Patent Applications 2001-011295 and 1999-302529, do not provide sufficient heat resistance, toughness, and cure degree for thermosetting resins.
Innovation Solution
A curing composition comprising a polyarylate with an epoxy group and a cyanate ester resin, which reacts to form an isocyanurate structure, incorporating a thermoplastic resin to enhance heat resistance, toughness, and control the cure degree.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional resin compositions (thermosetting resin with epoxy and liquid crystal polyester or polyphenylene ether, epoxy, and cyanate ester) are used, then the basic curing function is achieved, but heat resistance, toughness, and cure degree are insufficient
Solution Approach 1:
The patent combines polyarylate having epoxy groups (thermoplastic component) with cyanate ester resin (thermosetting component) to create a composite curing composition. This composite approach allows the thermoplastic polyarylate to provide toughness and heat resistance while the thermosetting cyanate ester provides structural rigidity and cure functionality, achieving superior overall performance compared to conventional single-system resin compositions.
2Strength
If polyarylate having epoxy group and cyanate ester resin are combined, then heat resistance and toughness are improved, but cure degree control becomes challenging
Solution Approach 1:
The patent controls cure degree by adjusting the molar ratio of epoxy groups to cyanate ester groups, typically maintaining a ratio of 0.95:1 to 1.05:1 for optimal curing. The polyarylate's molecular weight, epoxy group content, and the cyanate ester's structural parameters are also optimized to achieve complete reaction and maximum cure degree, ensuring precise control over the curing process and final network structure.
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 curing composition achieves excellent heat resistance and toughness while controlling the cure degree, making it suitable for various applications by preventing phase separation and optimizing the molar ratio of reactants.
Implementation Method 1
A cyanurate structure that is formed by curing the cyanate ester group of the cyanate ester resin is reacted with the epoxy group in the polyarylate, so that an isocyanurate structure is formed
Data Source
AI summary
The present invention relates to a curing composition comprising a polyarylate having epoxy group and a cyanate ester resin, and a cured product prepared by using the same. The curing composition according to the present invention is used to provide a cured product which is excellent in terms of heat resistance and toughness.