Cyanate-Epoxy Resin Composition with Latent Curing Agent
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Solution Overview
Problem
Conventional cyanate-epoxy composite resin compositions face challenges with storage stability and curing time, particularly requiring high temperatures and long curing times, which hinder the achievement of satisfactory performance in semiconductor sealing and molding applications.
Innovation Solution
A cyanate-epoxy composite resin composition comprising cyanate ester resin, epoxy resin, and a latent curing agent composed of a modified polyamine with active hydrogen, phenol resin, and polycarboxylic acid, which enhances storage stability and curing properties while maintaining high heat resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional epoxy resin or cyanate-epoxy composite resin is used, then adhesion and electrical performance are improved, but curing time increases and storage stability deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the curing agent by using a modified polyamine with specific structural characteristics (aliphatic or alicyclic hydrocarbon skeleton with primary and secondary amino groups). This parameter change enables the resin to cure at lower temperatures (80-120°C) and shorter times while maintaining adhesion and electrical performance
Solution Approach 2:
The patent creates a composite curing system by combining modified polyamine (c1), phenol resin (c2), and polycarboxylic acid (c3) in specific proportions. This composite approach synergistically improves both curing speed and storage stability while preserving the adhesion and electrical properties of the epoxy-cyanate system
2Reliability
If high temperature curing is applied to cyanate-epoxy composite resin, then curing completeness is improved, but storage stability deteriorates and curing time increases
Solution Approach 1:
The patent modifies the curing temperature parameter from conventional high temperature (150-200°C) to a lower range (80-120°C). This parameter change is achieved through the use of modified polyamine with specific reactivity characteristics, enabling complete curing at lower temperatures and shorter times without sacrificing curing completeness
3Productivity
If amine curing agent is used for cyanate-epoxy composite, then curing speed is improved, but storage stability deteriorates
Solution Approach 1:
The patent introduces local quality differentiation by using a polyamine with both primary and secondary amino groups having different reactivities. The secondary amino groups provide fast initial curing response, while the primary amino groups contribute to long-term storage stability. This local differentiation of functional group reactivity resolves the contradiction between curing speed and storage stability
4Stability of the object's composition
If latent curing agent with imidazole component is used, then storage stability is improved, but cyanate resin quantity must be limited reducing performance
Solution Approach 1:
The patent introduces phenol resin and polycarboxylic acid as intermediary substances that mediate between the modified polyamine and cyanate ester resin. These intermediaries facilitate complete reaction of cyanate groups while maintaining storage stability, removing the limitation on cyanate resin quantity and enabling full utilization of cyanate resin's heat resistance properties
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 achieves excellent storage stability, fast curing, and high heat resistance, making it suitable for various applications including semiconductor sealing and electronic materials, with improved adhesive properties and reduced curing time.
Implementation Method 1
a latent curing agent (C), and wherein the latent curing agent (C) is composed of a modified polyamine (c1), a phenol resin (c2) and one or more kind of polycarboxylic acid (c3), and the modified polyamine (c1) is a modified amine which has one or more amino group having an active hydrogen within a molecule
Data Source
AI summary
The present invention is a cyanate-epoxy composite resin composition comprised of a cyanate ester resin (A), an epoxy resin (B), and a latent curing agent (C), characterized in that the latent curing agent (C) is composed of a modified polyamine (c1), a phenol resin (c2) and one or more kind of polycarboxylic acid (c3). The above modified polyamine (c1) is a modified polyamine, which is obtained by the reaction of polyamine compound (c1-1) with epoxy compound (c1-2), containing one or more amino group having an active hydrogen within a molecule.