Phosphate Ester Composition for Low Pour Point and Viscosity
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Solution Overview
Problem
Existing phosphate ester compositions, particularly tri-aryl phosphate esters, face challenges in balancing performance requirements such as volatility, exudation, neurotoxicity, and stability, often leading to trade-offs in critical properties like liquidity, polymer miscibility, and pour point.
Innovation Solution
A phosphate ester composition with more than 50 mass% of a phosphate ester having multiple short chain substituents on the aryl group, specifically at the 3, 4, and/or 5 positions, which improves physical properties such as melt point, viscosity, and pour point while minimizing neurotoxicity and regulatory concerns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If para-substituted synthetic alkyl phenols are used to improve performance requirements, then volatility and exudation are improved, but pour point and viscosity worsen
Solution Approach 1:
The patent changes the substitution pattern parameter from para (4-position) to meta (3-position) or ortho (2-position) substituted phenols. This parameter change fundamentally alters the molecular packing and intermolecular forces, resulting in improved pour point and viscosity while maintaining the desired volatility and exudation control through appropriate alkyl group selection.
Solution Approach 2:
The patent employs composite phosphate ester structures combining aromatic rings with aliphatic alkyl chains of specific lengths (C1-C10). This composite structure allows the aromatic portion to control volatility and exudation while the aliphatic chains modulate pour point and viscosity, achieving a balanced performance profile.
2Reliability
If synthetic alkyl phenols are used to meet technical performance requirements, then flame retardancy and lubrication performance are improved, but neurotoxicity and regulatory compliance worsen
Solution Approach 1:
The patent changes the chemical structure parameters by using meta or ortho substituted phenols with controlled alkyl chain lengths, which alters the molecular configuration and reduces neurotoxicity while preserving the essential flame retardancy and lubrication performance through the phosphate ester functional group.
3Reliability
If triaryl phosphate esters are used to achieve flame retardancy, then flame resistance is improved, but liquidity and polymer miscibility worsen
Solution Approach 1:
The patent changes the substitution pattern from para to meta or ortho positions and controls the alkyl chain length (C1-C10), which reduces molecular symmetry and packing efficiency. This results in improved liquidity and polymer miscibility while the phosphate ester group maintains flame resistance.
Data Source
AI summary
A phosphate ester composition comprising more than 50 mass% of a phosphate ester represented by Formula 1, wherein X, Y, and Z are independently selected from the group consisting of alkyl, heteroalkyl, heteroaryl or aryl, with at least one of X, Y and Z being aryl, represented by Formula 2, and wherein two or more of R3, R4 and R5 have from 1 to 10 carbon atoms, and the total number of carbon atoms in R3, R4 and R5 is from 3 to 30. The use of the phosphate ester composition as a flame retardant, a lubricant, an anti-wear additive, a hydraulic fluid, a self-extinguishing functional fluid, or an additive thereof.