Bromine-Containing Polymers with Imide Moieties for Heat Resistance

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Solution Overview

Problem

There is a need for bromine-containing polymers with enhanced heat resistance and optical characteristics, particularly for applications where high refractive index and flame retardance are required, as existing materials do not adequately meet the increasing demands for heat resistance in resin materials.

Innovation Solution

The development of bromine-containing polymers with structural units of specific general formulas, including imide moieties with ring structures, which can be produced through monomer polymerization using aniline derivatives and acrylic acid halides, resulting in polymers with high bromine content and improved thermal stability and optical properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If conventional bromine-containing polymers are used, then flame retardance is achieved, but heat resistance is insufficient

Engineering Contradiction:

Improveheat resistanceVSAvoidflame retardance performance

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

The patent creates composite polymer structures by incorporating brominated aromatic rings into polymer backbones and side chains, combining the flame-retardant properties of bromine with the thermal stability of aromatic structures. This composite approach at the molecular level achieves both high heat resistance and effective flame retardance simultaneously

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent modifies the chemical structure parameters of polymer molecules by introducing specific brominated aromatic units with controlled bromine content (2-5 bromine atoms per repeating unit) and aromatic ring configurations, which fundamentally changes the thermal decomposition temperature and flame retardant efficiency of the material

Inventive Principle:

Principle #35Parameter changes

2Reliability

If bromine content is increased to enhance flame retardance, then optical characteristics deteriorate

Engineering Contradiction:

Improveflame retardanceVSAvoidoptical characteristics

Core Design Contradiction:

ReliabilityVSIllumination intensity

Solution Approach 1:

The patent concentrates bromine atoms in specific local regions (aromatic rings and side chains) rather than distributing them uniformly throughout the polymer structure. This localized bromination allows high flame retardance from concentrated bromine while maintaining better optical properties in the overall material structure

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent optimizes the bromine content parameter within a specific range (2-5 bromine atoms per repeating unit) and controls the structural parameters of aromatic units to achieve a balance between flame retardant efficiency and optical transparency, preventing excessive bromine from degrading optical characteristics

Inventive Principle:

Principle #35Parameter changes

3Temperature

If existing bromine-containing polymers are used, then flame retardance is provided, but heat resistance does not meet increasing application requirements

Engineering Contradiction:

Improveheat resistanceVSAvoidpolymer synthesis complexity

Core Design Contradiction:

TemperatureVSEase of manufacture

Solution Approach 1:

The patent employs pre-synthesized brominated aromatic monomers with defined structures before polymerization. This preliminary preparation of functional monomers simplifies the overall manufacturing process by enabling direct polymerization to achieve the desired high-heat-resistant, flame-retardant polymer without complex post-synthesis modifications

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent designs composite polymer structures incorporating multiple functional units (brominated aromatic rings, imide groups, ester linkages) that can be synthesized through standardized polymerization processes, making the complex high-performance material manufacturable through established industrial polymerization techniques

Inventive Principle:

Principle #40Composite materials

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 resulting polymers exhibit outstanding heat resistance and flame retardance, making them suitable for applications requiring high refractive index and thermal stability, while also maintaining excellent optical characteristics.

Implementation Method 1

a polymer including structural units of the following general formula (1)... The invention also pertains to a method for producing such polymers

Methodology Applied

Scientific EffectPolymerization: Photopolymerisation

Data Source

PatentUS10442876B2Bromine-containing polymers and methods for producing the same

Publication Date: 2019.10.15 MANAC

AI summary

The invention provides novel bromine-containing polymers which have excellent heat resistance and are capable of imparting flame retardance or novel flame-retardant, bromine-containing polymers which have excellent heat resistance and optical characteristics, and methods for producing such polymers. The invention relates to a polymer which includes structural units of the following general formula (1):wherein R1s, R2s, m, p and the asterisks are as defined in the specification and the claims, andto a method for producing such polymers.