Phosphorus Flame Retardant for Low-Dielectric Resin Laminates

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Solution Overview

Problem

Conventional phosphorus compounds used as flame retardants in resin materials exhibit inadequate electrical properties, heat resistance, and hydrolysis resistance, limiting their suitability for high-frequency applications in miniaturized electronic devices with multiple build-up layers.

Innovation Solution

A phosphorus compound with three o-vinylphenyl groups is used as a flame retardant in resin compositions, enhancing flame retardancy, electrical characteristics, heat resistance, and hydrolysis resistance, suitable for prepregs, metal foils, thermosetting resin films, metal-clad laminates, and printed wiring boards.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If conventional phosphorus compounds (with vinyl or allyl groups) are used as flame retardants, then flame retardancy is achieved, but electrical properties and heat resistance are insufficient

Engineering Contradiction:

Improveflame retardancyVSAvoidelectrical properties and heat resistance

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent changes the chemical structure parameters of the phosphorus compound by introducing o-vinylphenyl groups instead of conventional vinyl or allyl groups. This structural modification results in improved electrical properties (lower dielectric tangent) and enhanced heat resistance while maintaining flame retardancy, directly resolving the contradiction between flame safety and electrical performance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite resin composition by combining the specifically structured phosphorus compound (with o-vinylphenyl groups) with resin components. This composite approach allows the phosphorus compound to function both as a flame retardant and as an electrical performance enhancer, simultaneously achieving flame retardancy and improved electrical properties that neither component could achieve alone

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If conventional phosphorus compounds are used as flame retardants, then flame retardancy is achieved, but resistance to hydrolysis is low

Engineering Contradiction:

Improveflame retardancyVSAvoidhydrolysis resistance

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The patent modifies the chemical parameters of the phosphorus compound by incorporating o-vinylphenyl groups, which create a more stable molecular structure resistant to hydrolysis. This structural change maintains the flame-retardant functionality while significantly improving hydrolysis resistance, resolving the contradiction between flame safety and chemical stability

Inventive Principle:

Principle #35Parameter changes

3Reliability

If resin materials are designed for high-frequency applications with low dielectric tangent, then electrical signal transmission is improved, but flame retardancy and heat resistance are insufficient

Engineering Contradiction:

Improveelectrical properties (low dielectric tangent)VSAvoidflame retardancy and heat resistance

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent develops a multi-functional phosphorus compound with o-vinylphenyl groups that simultaneously provides electrical performance enhancement (low dielectric tangent), flame retardancy, and heat resistance. This single compound performs multiple functions that were previously achieved by separate additives, resolving the contradiction between electrical performance and safety properties

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent creates a composite resin system where the specially structured phosphorus compound works synergistically with the resin matrix to achieve both low dielectric tangent for high-frequency applications and adequate flame retardancy. The composite structure allows simultaneous optimization of electrical and safety properties

Inventive Principle:

Principle #40Composite materials

Data Source

PatentEP4663669A1Flame retardant and use thereof

Publication Date: 2025.12.17 SHIKOKU CHEM CORP

Figure 1

AI summary

The present invention provides a flame retardant containing a phosphorus compound and its use. Specifically, the present invention provides a flame retardant containing a phosphorus compound represented by chemical formula (I), a resin composition containing the flame retardant and a resin component, a prepreg containing the resin composition, metal foil with resin, a thermosetting resin film, a metal-clad laminate, a printed wiring board, and an adhesive: wherein each R1 is the same or different and represents hydrogen or C1-10 alkyl, and each R2 is the same or different and represents hydrogen or C1-10 alkyl.