Polymeric Phosphorus Additives for Lubricant Anti-Wear
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Solution Overview
Problem
Current lubricants such as gear oils, greases, engine oils, and transmission fluids lack enhanced performance in terms of anti-wear properties and friction reduction.
Innovation Solution
Development of phosphorus-containing compounds, including polyhydrogen-phosphite, phosphate, thiophosphate, and phosphite compounds, with specific structures and molecular weights, which are used as additives in lubricants to improve anti-wear performance and reduce friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lubricants are used, then basic lubrication function is provided, but anti-wear performance and friction reduction are insufficient
Solution Approach 1:
The patent changes the chemical parameters of lubricant additives by using polymeric phosphorus compounds with specific molecular weights (1,000-30,000 Daltons) and controlled phosphorus content (3-15% by weight). These parameter changes enable superior anti-wear performance while maintaining manufacturing feasibility through established polymerization processes.
Solution Approach 2:
The invention employs composite phosphorus-containing compounds incorporating multiple functional groups (phosphite, phosphate, thiophosphate) within single polymeric molecules. This composite structure provides multi-functional protection against wear and friction while improving overall lubricant reliability without requiring multiple separate additives.
2Reliability
If alkylphenol-containing additives are used, then anti-wear performance is improved, but environmental and health concerns arise
Solution Approach 1:
The patent extracts and removes alkylphenol moieties from the additive structure while retaining the essential phosphorus-containing anti-wear functionality. The resulting alkylphenol-free polymeric compounds maintain effective lubrication performance without the harmful environmental and health effects associated with alkylphenols.
Solution Approach 2:
The invention replaces persistent harmful substances (alkylphenols) with biodegradable polymeric phosphorus compounds that provide effective anti-wear protection during their service life but do not persist in the environment, effectively creating a 'short-living' benign alternative to long-living harmful additives.
Data Source
AI summary
A method having the step of using a compound as an additive for: gear oil, grease, engine oil, combustion-engine lubricant, automatic transmission fluid, two-cycle engine lubricant, marine-engine lubricant, or anti-wear agent, the compound having the structure:wherein each R is an independently selected alkylphenol-free moiety that is a C1-22 alkyl, C6-40 cycloalkyl, C3-20 methoxy alkyl glycol ether, C3-20 alkyl glycol ether, or Y—OH moiety; wherein each Y is an independently selected alkylphenol-free moiety that is a C2-40 alkylene, C6-40 cycloalkylene, C2-20 alkylene glycol ether, or C3-40 alkylene lactone moiety; wherein each m is an independently selected integer ranging from 1 to 100; and wherein x is an integer ranging from 1 to 1000.