Vinyl-Modified Polyphenylene Ether Resin for Low Dissipation Factor and Flame Retardancy
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Solution Overview
Problem
Conventional polyphenylene ether resins used in copper-clad laminates and printed circuit boards lack sufficient flame retardancy and thermal resistance, and the addition of flame retardants often increases the dissipation factor, failing to meet the requirements of low dielectric properties, high thermal resistance, and dimensional stability.
Innovation Solution
A resin composition incorporating a prepolymer of vinyl-containing polyphenylene ether and a specific phosphorus-containing salt is developed, which maintains low dielectric properties while enhancing flame retardancy and thermal resistance, comprising specific phosphorus-containing salts and vinyl compounds, along with other additives like maleimides and inorganic fillers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polyphenylene ether resin is used to achieve low dissipation factor, then low dielectric properties are obtained, but flame retardancy and thermal resistance are insufficient
Solution Approach 1:
The patent uses a composite material system consisting of vinyl-containing polyphenylene ether resin combined with specific phosphorus-containing flame retardants (such as phosphazene compounds). This composite approach allows the base resin to provide low dissipation factor while the flame retardant additives provide the necessary flame retardancy and thermal resistance, resolving the contradiction between dielectric properties and fire safety
Solution Approach 2:
The patent modifies the chemical structure parameters of the polyphenylene ether resin by introducing vinyl groups at specific positions (2,6- or 3,5-positions). This structural parameter change enables the resin to maintain low dissipation factor while providing better compatibility with flame retardants and improved thermal resistance, thus achieving both low dielectric properties and enhanced flame retardancy
2Reliability
If flame retardants are added to improve flame retardancy, then flame retardancy is enhanced, but dissipation factor becomes worse (higher)
Solution Approach 1:
The patent applies local quality by selectively placing vinyl groups at specific positions (2,6- or 3,5-positions) on the polyphenylene ether molecular structure. This localized structural modification creates specific interaction sites that enhance compatibility with phosphorus-containing flame retardants, allowing the flame retardants to be effectively incorporated without significantly increasing the overall dissipation factor of the material
Solution Approach 2:
The vinyl-containing polyphenylene ether resin acts as an intermediary that bridges the compatibility gap between the polymer matrix and phosphorus-containing flame retardants. The vinyl groups serve as chemical mediators that facilitate uniform dispersion and strong interaction with the flame retardants, enabling effective flame retardancy while minimizing the adverse impact on dielectric properties
3Object-affected harmful factors
If conventional polyphenylene ether is used to achieve low dissipation factor, then low dielectric properties are obtained, but thermal resistance is insufficient
Solution Approach 1:
The patent changes the thermal parameters of the polyphenylene ether resin by introducing vinyl groups at specific positions, which elevates the glass transition temperature and improves thermal resistance. This parameter modification allows the resin to maintain its low dissipation factor property while achieving the required thermal resistance for high-performance copper-clad laminates and printed circuit boards
Data Source
AI summary
A resin composition, a copper-clad laminate using the same, and a printed circuit board using the same are introduced. The resin composition comprises a specific phosphorus-containing salt and a prepolymer of vinyl-containing polyphenylene ether. The resin composition features specific ingredients and proportion to thereby achieve satisfactory properties of prepreg made from the resin composition, and attain satisfactory laminate properties, such as high degree of heat resistance and satisfactory dielectric properties, and thus is suitable for producing a prepreg or a resin film to thereby be applicable to copper-clad laminates and printed circuit boards.