PFPE Polymer Lubricant Composition Without Viscosity Modifiers
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Solution Overview
Problem
Existing fluoropolyether-based compositions lack optimal dynamic viscosity, necessitating the use of viscosity modifiers, which complicates their application as lubricants in harsh environments.
Innovation Solution
A composition comprising a specific polymer with a chemical formula T-O-[A-B]z-[A-B']z'-A-T' and a (per)fluoropolyether polymer, optionally with additives, achieving a dynamic viscosity of 60 Pa*s or higher without the need for viscosity modifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing fluoropolyether-based compositions are used, then lubrication function is provided, but dynamic viscosity is insufficient requiring additional viscosity modifiers
Solution Approach 1:
The patent applies composite materials by combining two distinct fluoropolyether polymer components with different molecular structures and viscosity characteristics. Component (a) contains cyclic carbonate units providing base viscosity, while component (b) contains carboxylate units that contribute to viscosity enhancement and chemical reactivity. This composite approach achieves optimal dynamic viscosity (60-5000 cSt at 40°C) without requiring separate viscosity modifiers, thus maintaining lubrication function while simplifying the overall composition.
Solution Approach 2:
The patent employs parameter changes by systematically varying the molecular weight, composition ratio, and structural parameters of the two fluoropolyether components. By controlling the weight ratio between component (a) and component (b), and adjusting their respective molecular weights and monomer compositions, the patent achieves precise control over dynamic viscosity across a wide range (60-5000 cSt at 40°C), eliminating the need for additional viscosity modifiers while maintaining reliable lubrication performance.
2Stability of the object's composition
If viscosity modifiers are added to achieve optimal dynamic viscosity, then viscosity is improved, but the composition requires additional additives complicating application
Solution Approach 1:
The patent applies universality by designing fluoropolyether components that simultaneously provide multiple functions: base oil properties, viscosity control, and lubrication enhancement. The fluoropolyether polymers with specific molecular weights and compositions (containing cyclic carbonate or carboxylate units) inherently provide both the required dynamic viscosity stability (60-5000 cSt at 40°C) and lubrication performance, eliminating the need for separate viscosity modifiers and simplifying the composition to a binary system.
Solution Approach 2:
The patent uses parameter changes by adjusting the molecular weight, composition, and ratio of the fluoropolyether components to achieve the desired dynamic viscosity range (60-5000 cSt at 40°C) without any additional additives. By varying parameters such as the weight percentage of each component (5-95 wt% component (a), 5-95 wt% component (b)) and their structural characteristics, the patent achieves precise viscosity control while maintaining a simple two-component formulation.
3Device complexity
If simple fluoropolyether compositions are used, then composition simplicity is maintained, but dynamic viscosity is insufficient for harsh environment lubrication
Solution Approach 1:
The patent applies composite materials by combining two fluoropolyether components with complementary properties: component (a) with cyclic carbonate units provides a stable base viscosity, while component (b) with carboxylate units contributes enhanced viscosity and chemical reactivity. This simple binary composite system achieves the required dynamic viscosity stability (60-5000 cSt at 40°C) for harsh environment lubrication without complicating the formulation, maintaining ease of application.
Solution Approach 2:
The patent employs parameter changes by systematically adjusting the molecular weight, composition ratio, and structural parameters of the two fluoropolyether components. By controlling the weight ratio between component (a) and component (b), and optimizing their respective molecular weights and monomer compositions, the patent achieves precise control over dynamic viscosity (60-5000 cSt at 40°C), providing sufficient viscosity for harsh environment lubrication while maintaining a simple two-component composition.
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 composition provides a semi-liquid consistency suitable for lubrication in harsh environments, enhancing performance and eliminating the need for additional additives.
Implementation Method 1
said composition can be used as lubricant for industrial applications
Data Source
AI summary
The present invention relates to compositions comprising at least one (per)fluoropolyether base oil and at least one polymer obtained by the copolymerization of (per)fluoropolyether (PFPE), tetrafluoroethylene (TFE) and at least one non-homopolymerizable olefin.