Resin Composition Prepolymerization for Phase Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing resin compositions for high-speed electronic circuit substrates face issues with incompatibility between polyphenylene ether and maleimide, leading to phase separation and poor heat resistance, which affects dielectric properties and mechanical stability.
Innovation Solution
A resin composition comprising a prepolymer of vinyl thermosetting polyphenylene ether and bifunctional or polyfunctional maleimide, combined with a polyolefin resin, which undergoes prepolymerization to enhance compatibility and cross-linking density, along with the addition of a bromine-containing or phosphorus-containing flame retardant for improved heat resistance and dielectric properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polyphenylene ether and maleimide are mixed directly, then crosslinking density is improved, but phase separation and turtle-like cracks occur due to incompatibility
Solution Approach 1:
The patent applies preliminary action by conducting prepolymerization of polyphenylene ether and maleimide before final mixing with polyolefin resin. This preliminary reaction creates a compatible intermediate product that can be uniformly mixed with the polyolefin resin, avoiding phase separation and cracking issues that would occur with direct mixing of incompatible components.
2Ease of manufacture
If monomaleimide structure is used, then processing is simplified, but heat resistance decreases and thermal expansion coefficient increases
Solution Approach 1:
The patent uses composite materials by combining polyphenylene ether with bifunctional or polyfunctional maleimide structures. This composite approach creates a resin system that maintains good processability while achieving higher heat resistance and lower thermal expansion coefficients compared to monomaleimide systems, due to the enhanced crosslinking network formed by the multifunctional maleimide.
3Strength
If styrene-butadiene copolymer and polyphenylene ether are mixed with maleimide, then flexibility is improved, but glue liquid layers and turtle-like cracks appear
Solution Approach 1:
The patent applies preliminary action by first reacting polyphenylene ether with maleimide through prepolymerization to create a compatible intermediate product. This preliminary reaction eliminates the incompatibility issues that would otherwise cause layering and cracking when mixing styrene-butadiene copolymer, polyphenylene ether, and maleimide together.
4Speed
If low dielectric constant material is used, then signal transmission rate is improved, but dielectric loss factor increases
Solution Approach 1:
The patent applies parameter changes by optimizing the chemical structure and composition of the resin system. By using vinyl thermosetting polyphenylene ether with specific molecular weight and combining it with bifunctional or polyfunctional maleimide, the patent achieves a balance where both dielectric constant and dielectric loss factor are minimized, improving both signal transmission rate and reducing signal loss.
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 solution achieves uniform prepreg formation without phase separation, enhances heat resistance, and improves dielectric properties, resulting in high-performance electronic circuit substrates with superior thermal stability and reduced signal loss.
Implementation Method 1
vinyl thermosetting polyphenylene ether and maleimide are subjected to prepolymerization
Implementation Method 2
cross-linking density, along with the addition of a bromine-containing or phosphorus-containing flame retardant for improved heat resistance
Data Source
AI summary
Copper clad laminates and a resin composition and a pre-preg and a laminate using the composition. The resin composition contains: (A) a prepolymer of vinyl thermosetting polyphenylene ether and a bifunctional maleimide or a multifunctional maleimide; and, (B) a polyolefin resin. Employing the prepolymer of vinyl thermosetting polyphenylene ether and the bifunctional maleimide or the multifunctional maleimide, solves the problem of incompatibility of the bifunctional maleimide or the multifunctional maleimide with the vinyl thermosetting polyphenylene ether and the polyolefin resin. An aqueous glue solution so mixed is uniform and consistent, the prepreg has a uniform expression, and a substrate resin area is free of a phase-separation problem.