Metal-Substituted Polyetherimide for Thermal Stability and Strength

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Solution Overview

Problem

There is a continuing need for thermoplastic polyimides and polyetherimides with high thermal stability and superior mechanical properties, which are not adequately met by existing materials.

Innovation Solution

A polyimide is developed that includes repeating units of a specific formula, which can be combined with a second polyimide to create a polymer composition with enhanced properties. The polyimide is synthesized through a method involving the reaction of a dianhydride and a diamine, optionally with another diamine, in a solvent under effective conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If conventional polyimides and polyetherimides are used, then basic thermal stability and mechanical properties are achieved, but superior thermal stability and mechanical properties are not attained

Engineering Contradiction:

Improvethermal stabilityVSAvoidperformance adequacy

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

The patent modifies the chemical structure of polyimide repeating units by incorporating ionic groups (sulfonate, carboxylate, phosphonate) and metal cations to change the physical and chemical parameters of the polymer, thereby achieving superior thermal stability and mechanical properties compared to conventional polyimides

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates composite structures within the polymer chain by combining organic polyimide backbone with inorganic ionic groups and metal cations, forming a composite material that exhibits enhanced thermal stability and mechanical properties beyond what either component could achieve alone

Inventive Principle:

Principle #40Composite materials

2Adaptability or versatility

If ionic functionalities are incorporated into polyimide structure, then tunable hydrophilicity and mechanical properties are achieved, but structural complexity increases

Engineering Contradiction:

Improvetunable hydrophilicityVSAvoidmolecular structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent introduces ionic groups at specific local positions within the polyimide repeating units, allowing localized modification of hydrophilicity and mechanical properties without requiring complete structural redesign of the entire polymer chain

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent designs polyimide repeating units that simultaneously provide structural integrity through the polyimide backbone and tunable hydrophilicity through ionic groups, creating a multi-functional structure that achieves multiple properties with a single molecular design

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250122340A1Polyetherimide having metal-substituted anionic pendant groups

Publication Date: 2025.04.17 SHPP GLOBAL TECH BV

AI summary

A polyimide, comprising 1-100 mol % of repeating units of formula (1), based on 100 mol % of total repeating units of the polyimide, wherein each V is as defined herein; and each R1 is independently a divalent group of formula (3), wherein A is anionic, and each A is independently —O, —S, —S(O)2, —S(O)2O, —OS(O)2O, —OP(O) (OR)dO, —P(O)(Re)O, —P(O)(ORf)O, or —OP(O)(Rg)O; and X is cationic, and each X is independently Li, Na, K, Cs, Mg, Ca, Sr, Cr, Mn, Fe, Co, Ni, Cu, Ag, Zn, Cd, B, Al, Ga, In, Ge, Sn, Pb, As, Sb, phosphonium, imidazolium, guanidinium, or pyridinium; and Rd, Re, Rf, and Rg are each independently hydrogen, substituted or unsubstituted C1-8 alkyl, or substituted or unsubstituted C6-12 aryl.