Phosphorus Flame-Retardant PPO Resin Composition With Better Compatibility

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Solution Overview

Problem

There is a compatibility issue between general flame retardants and polyphenylene oxide resins, leading to uneven distribution or precipitation during the curing process, which affects the application of flame-retardant polyphenylene oxide resins, especially in high-frequency communication substrates and printed circuit boards.

Innovation Solution

A phosphorus-containing compound is synthesized through a series of reactions and reactions involving organic phosphorus-containing compounds, which are then mixed with polyphenylene oxide resins to form a flame-retardant polyphenylene oxide resin composition, followed by curing with a double bond initiator to create a flame-retardant polyphenylene oxide resin cured product.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If general flame retardants are added to polyphenylene oxide resins, then flame retardancy is improved, but compatibility deteriorates leading to uneven distribution or precipitation

Engineering Contradiction:

Improveflame retardancyVSAvoidcompatibility

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent uses a coupling agent as an intermediary substance that chemically bonds to both the flame retardant particles and the polyphenylene oxide resin matrix. This coupling agent has functional groups that interact with both materials, creating a bridge that improves interfacial adhesion and prevents phase separation, thereby resolving the compatibility issue while maintaining flame retardancy

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent modifies the surface properties of the flame retardant particles by treating them with silane coupling agents or other surface modifiers. This changes the surface chemistry and morphology parameters of the flame retardant, making it more compatible with the polyphenylene oxide resin and preventing precipitation during curing

Inventive Principle:

Principle #35Parameter changes

2Reliability

If halogen-containing flame retardants are used, then flame retardancy is improved, but environmental compatibility deteriorates

Engineering Contradiction:

Improveflame retardancyVSAvoidenvironmental harm

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces halogen-containing flame retardants with phosphorus-based alternatives, changing the chemical composition parameter from halogen to phosphorus. This substitution maintains the flame retardant function through different chemical mechanisms (phosphorus forms protective char layers) while eliminating the harmful environmental effects of halogen release during combustion

Inventive Principle:

Principle #35Parameter changes

3Temperature

If DOPO derivatives are used as flame retardants, then thermal stability is improved, but manufacturing cost increases

Engineering Contradiction:

Improvethermal stabilityVSAvoidmanufacturing cost

Core Design Contradiction:

TemperatureVSEase of manufacture

Solution Approach 1:

The patent segments the flame retardant system into multiple components: a base phosphorus compound providing thermal stability and a cost-effective additive or modifier enhancing flame retardancy. This segmentation allows the use of cheaper materials in combination, reducing overall manufacturing cost while maintaining the high thermal stability characteristic of DOPO derivatives

Inventive Principle:

Principle #1Segmentation

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 synthesized compound improves compatibility with polyphenylene oxide resins, maintaining thermal stability and flame retardancy while reducing manufacturing costs, resulting in high glass transition temperature and low dielectric properties suitable for base boards, copper foil substrates, and printed circuit boards.

Implementation Method 1

The synthesized compound improves compatibility with polyphenylene oxide resins

Methodology Applied

Scientific EffectCompatibility:

Implementation Method 2

A phosphorus-containing compound including phenyl methacrylate and vinylbenzylether functional group

Methodology Applied

Scientific EffectChemical bonding: Chemical Bonding

Implementation Method 3

followed by curing with a double bond initiator to create a flame-retardant polyphenylene oxide resin cured product

Methodology Applied

Scientific EffectCuring: Photopolymerisation

Implementation Method 4

maintaining thermal stability and flame retardancy

Methodology Applied

Scientific EffectThermal stability:

Implementation Method 5

maintaining thermal stability and flame retardancy

Methodology Applied

Scientific EffectFlame retardancy:

Data Source

PatentUS20250368669A1Phosphorus-containing compound, manufacturing method thereof, flame-retardant polyphenylene oxide resin composition and cured product

Publication Date: 2025.12.04 NATIONAL CHUNG HSING UNIVERSITY

AI summary

A phosphorus-containing compound includes a structure represented by formula (I), and symbols in formula (I) are as defined in the specification. A manufacturing method of the phosphorus-containing compound includes performing a synthesis reaction, performing a catalytic reaction and performing a substitution reaction. The synthesis reaction is performed to react an organic phosphorus-containing compound with a carbonyl-containing compound so as to obtain a hydroxyl-containing compound. The catalytic reaction is performed to react the hydroxyl-containing compound with a phenol compound so as to obtain a phosphorus-based hydroxyl compound. The substitution reaction is performed so as to obtain the phosphorus-containing compound.