Reactive Phosphorus Compound for Low-Water-Absorption Crosslinking

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Solution Overview

Problem

Existing phosphorus-containing compounds lack reactive functional groups, leading to issues such as increased water absorption and inability to engage in crosslinking with vinyl group-containing compounds, limiting their effectiveness as flame retardants and crosslinking agents.

Innovation Solution

A novel vinyl group-containing phosphorus-containing compound is synthesized through a two-step reaction involving magnolol with phosphoryl chloride and benzenediol in alkaline environments, forming compounds with reactive functional groups that can crosslink with vinyl group-containing compounds.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If phosphorus-containing compounds with reactive hydroxyl groups are used, then crosslinking capability is improved, but water absorption rate increases

Engineering Contradiction:

Improvecrosslinking capabilityVSAvoidwater absorption rate

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by selectively introducing reactive functional groups (vinyl, epoxy, or isocyanate groups) only at specific positions of the phosphorus-containing compound molecule, rather than using hydroxyl groups throughout. This allows the compound to exhibit crosslinking capability at specific sites while maintaining low water absorption properties overall, as the bulk phosphorus structure remains hydrophobic.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the chemical parameter of the functional group from hydroxyl (-OH) to alternative groups (vinyl, epoxy, isocyanate) that provide crosslinking functionality without the harmful water absorption characteristic. This parameter change transforms the compound's properties to achieve crosslinking capability while avoiding increased water absorption.

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If common phosphorus-containing compounds without reactive functional groups are used, then water absorption rate is reduced, but crosslinking capability is lost

Engineering Contradiction:

Improvewater absorption rateVSAvoidcrosslinking capability

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The patent merges two previously separate functions into a single phosphorus-containing compound: the flame retardant function (provided by the phosphorus core structure) and the crosslinking function (provided by the introduced reactive functional groups). This combination allows the compound to simultaneously achieve low water absorption and crosslinking capability without requiring separate additives.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a multi-functional phosphorus-containing compound that can serve multiple purposes: flame retardancy through phosphorus decomposition products, crosslinking through reactive functional groups, and low water absorption through the hydrophobic phosphorus core. The compound's versatility is enhanced by offering multiple types of reactive groups (vinyl, epoxy, isocyanate) that can crosslink with different polymer systems.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If phosphorus-containing compounds are used as flame retardants, then flame retardancy is achieved, but reactivity with vinyl group-containing compounds is lost

Engineering Contradiction:

Improveflame retardancyVSAvoidreactivity with vinyl group-containing compounds

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent changes the chemical reactivity parameter of the phosphorus-containing compound by introducing vinyl groups that can participate in vinyl polymerization reactions. This allows the compound to react with vinyl group-containing compounds while maintaining its flame retardant properties through the phosphorus core structure.

Inventive Principle:

Principle #35Parameter changes

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 compounds provide flame retardancy by forming a protective coke layer and capturing free radicals, while also acting as crosslinking agents due to their reactive functional groups, enhancing material properties.

Implementation Method 1

Because phosphorus-containing compounds will produce phosphoric acid during heating and combustion, a coke layer will be formed to insulate combustibles against oxygen

Methodology Applied

Scientific EffectCoke layer formation:

Implementation Method 2

during heating and combustion, phosphorus-containing compounds can also capture free radicals formed during the combustion reaction to inhibit substance degradation to inhibit further combustion

Methodology Applied

Scientific EffectFree radical capture:

Data Source

PatentUS12516075B2Phosphorus-containing compound and preparation method thereof

Publication Date: 2026.01.06 ELITE MATERIAL

AI summary

A phosphorus-containing compound of Formula (1) and a preparation method thereof are provided. The phosphorus-containing compound is a compound having a reactive functional group and containing a phosphorus atom in its structure. The preparation method includes: (1) reacting magnolol and phosphoryl chloride in a first alkaline environment to obtain an intermediate product; and (2) reacting the intermediate product and a benzenediol in a second alkaline environment to obtain the phosphorus-containing compound.