Aromatic Polymer Lubricant Compositions for High-Temperature Stability

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Solution Overview

Problem

Existing lubricants face challenges in maintaining stability and consistency at high temperatures, especially when used in oxidizing environments, due to the separation of liquid additives from solid components and evaporation, which is exacerbated by the use of high amounts of liquid stabilizing additives, and the environmental concerns associated with PTFE powder.

Innovation Solution

Aromatic polymers with specific particle sizes and surface areas are used to stabilize hydrogenated and fluorinated oils at high temperatures, even above 200°C, by incorporating them into lubricant compositions in controlled amounts, avoiding the use of PTFE.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If liquid stabilizing additives are used in high amounts (higher than 5% by weight) to stabilize oils at high temperatures, then thermal stability is improved, but liquid separation from solid components increases and grease consistency changes

Engineering Contradiction:

Improvethermal stabilityVSAvoidgrease consistency

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The invention changes the physical state parameter of the stabilizing additive from liquid to solid form. Solid stabilizing additives are used instead of liquid additives, which prevents the liquid separation issue while maintaining thermal stability. The solid form eliminates the volume expansion and separation problems that occur with liquid additives at high temperatures.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses composite materials by combining solid stabilizing additives with lubricant oils and thickeners to create a stable grease composition. This composite approach ensures that the stabilizing component remains solid at operating temperatures, preventing separation from the liquid lubricant components while maintaining the desired thermal stability.

Inventive Principle:

Principle #40Composite materials

2Reliability

If liquid stabilizing additives are used in high amounts to stabilize oils at high temperatures, then thermal stability is improved, but evaporation increases

Engineering Contradiction:

Improvethermal stabilityVSAvoidevaporation

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The invention changes the physical state from liquid to solid for the stabilizing additive. Solid additives have significantly lower vapor pressure than liquid additives, which prevents evaporation loss while maintaining thermal stability. This parameter change eliminates the evaporation problem inherent in liquid-based stabilizing systems.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If PTFE powder is used to stabilize lubricants, then thermal stability is improved, but environmental friendliness deteriorates

Engineering Contradiction:

Improvethermal stabilityVSAvoidenvironmental impact

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention replaces PTFE powder with alternative solid stabilizing additives that are environmentally friendly. These alternative materials achieve the same thermal stability function without the environmental hazards associated with PTFE, providing a sustainable solution that maintains performance while reducing harm.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS12600919B2Lubricating compositions

Publication Date: 2026.04.14 SYENSQO SPECIALTY POLYMERS USA LLC

AI summary

The present patent application relates to the use of non fluorinated aromatic polymers as additives for fluorinated lubricants.