Thiophosphate Anti-Wear Additives for Seal Durability
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Solution Overview
Problem
Traditional anti-wear components in lubricating compositions, which include acidic organophosphates with amines and metal ions, suffer from poor seal durability, reduced oxidative stability, and inadequate corrosion inhibition, and are environmentally undesirable due to regulatory pressures to remove amines and metal ions.
Innovation Solution
Development of novel thiophosphate compounds and their derivatives, which are used as anti-wear additives in lubricant compositions, formulated without amines and metal ions, and prepared through a process involving phosphorodithioating agents and epoxides, combined with detergents like sulfonates or phenates, to enhance anti-wear properties and oxidative stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional acidic organophosphates with amines and metal ions are used as anti-wear components, then good anti-wear protection is provided, but seal durability deteriorates and oxidative stability is reduced
Solution Approach 1:
The invention extracts and removes amines and metal ions from the anti-wear additive composition, eliminating the harmful components while retaining the essential phosphorus and sulfur elements. This is achieved by using novel thiophosphate compounds that do not require amine or metal ion salts, thereby improving seal durability while maintaining anti-wear protection
Solution Approach 2:
The invention changes the chemical composition parameters by eliminating amine and metal ion content while maintaining phosphorus and sulfur content at effective levels. This parameter change transforms the additive from a traditional amine-salted organophosphate to a novel thiophosphate compound that is compatible with elastomeric seals
2Reliability
If traditional acidic organophosphates with amines and metal ions are used as anti-wear components, then good anti-wear protection is provided, but oxidative stability is reduced
Solution Approach 1:
The invention removes amine and metal ion components that are prone to oxidation and degradation. By eliminating these reactive components and using stable thiophosphate compounds instead, the oxidative stability of the lubricating composition is improved while maintaining anti-wear efficacy
Solution Approach 2:
The invention uses composite lubricating compositions that combine novel thiophosphate compounds with specific detergent types (sulfonates or phenates) to achieve both anti-wear protection and oxidative stability. This composite approach allows the formulation to benefit from the complementary properties of different additive classes
3Reliability
If traditional acidic organophosphates with amines and metal ions are used as anti-wear components, then good anti-wear protection is provided, but corrosion inhibition becomes inadequate
Solution Approach 1:
The invention changes the chemical parameters by eliminating amine and metal ion content, which are known to cause corrosion issues. The novel thiophosphate compounds provide corrosion inhibition through their inherent chemical structure rather than through amine or metal ion mechanisms
4Reliability
If traditional acidic organophosphates with amines and metal ions are used as anti-wear components, then good anti-wear protection is provided, but environmental impact increases
Solution Approach 1:
The invention extracts and eliminates amine and metal ion components from the anti-wear additive, removing the environmentally harmful substances. This results in a more environmentally friendly lubricating composition that maintains effective anti-wear protection through phosphorus and sulfur-containing thiophosphate compounds
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 thiophosphate compounds provide effective anti-wear protection, extend the life of elastomeric seals, and improve oxidative stability while minimizing environmental impact by eliminating amines and metal ions, thus addressing the limitations of traditional additives.
Implementation Method 1
reacting a first phosphorodithioating agent with a first epoxide
Data Source
AI summary
The invention relates to thiophosphates and derivatives thereof useful as antiwear additive components, lubricant additive compositions and lubricant compositions each comprising such compounds, methods for making and using the same, including methods of lubricating machines and machine parts and methods of extending the useful life of elastomeric seal components of such machines.