DOPO Derivative Flame Retardants for Polymers

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional halogenated flame retardants for polymers pose ecological concerns and are not thermally stable, leading to undesirable properties and volatility issues during high-temperature processing.

Innovation Solution

Development of a halogen-free flame retardant compound based on 9,10-Dihydro-9-Oxa-10-Phosphaphenantrene-10-oxide (DOPO) that is thermally and hydrolytically stable, suitable for use in a wide range of polymers, with specific processing and formulation techniques to ensure effective incorporation and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If halogenated flame retardants are used in polymers, then flame retardancy is achieved, but ecological concerns and thermal stability deteriorate

Engineering Contradiction:

Improveflame retardancyVSAvoidthermal stability

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent changes the chemical composition parameters by replacing halogenated compounds with DOPO-derived organophosphorus compounds. This parameter change maintains flame retardancy while improving thermal stability and eliminating ecological concerns associated with halogenated flame retardants

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs organophosphorus compounds as replaceable flame retardant additives that can be incorporated into polymers without compromising the base polymer's long-term stability, providing a sustainable alternative to persistent halogenated compounds

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Object-affected harmful factors

If conventional organophosphorus flame retardants are used, then flame retardancy is provided, but processing stability deteriorates at high temperatures

Engineering Contradiction:

Improveflame retardancyVSAvoidprocessing stability

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The patent modifies the molecular structure parameters of organophosphorus compounds by introducing specific substituents and core structures that enhance thermal and hydrolytic stability, enabling these flame retardants to withstand high-temperature polymer processing without decomposition or unwanted side reactions

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent performs preliminary structural optimization of the DOPO-derived compounds before polymer processing, ensuring they possess the necessary thermal stability to survive subsequent high-temperature processing steps without degradation

Inventive Principle:

Principle #10Preliminary action

3Object-affected harmful factors

If flame retardants are added to polymers, then flame retardancy is achieved, but volatility increases during processing

Engineering Contradiction:

Improveflame retardancyVSAvoidvolatility

Core Design Contradiction:

Object-affected harmful factorsVSLoss of substance

Solution Approach 1:

The patent changes the molecular weight and structural complexity parameters of the flame retardant compounds, creating larger, more stable DOPO-derived molecules that have lower volatility and remain effectively retained during high-temperature polymer processing

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP2432789B1DOPO derivative flame retardants

Publication Date: 2017.04.26 ALBEMARLE CORP

AI summary

The present invention relates to novel, halogen-free flame retardant derived from 9,10-Dihydro-9-Oxa-10-Phosphaphenantrene-10-oxide (DOPO). This invention also relates to the use of the halogen free DOPO derived flame retardant in polymers.