Emulsifier for solubilizing polar solvents in oils and polyols
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The polyurethane foam industry faces challenges in achieving long-term stability and consistency when using natural oil polyols, particularly soy polyols, due to compatibility issues and phase separation, which requires the development of effective surfactant systems that can solubilize polar solvents in non-polar liquids.
Innovation Solution
A composition comprising lecithin, a plasticizer, and a co-surfactant is used to create an emulsifier blend that solubilizes polar solvents in non-polar liquids, improving the solubility and stability of natural oil polyols in polyurethane foams, thereby enhancing foam structure and rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If natural oil polyols (soy polyols) are used to replace petroleum based polyols, then environmental friendliness is improved, but foam structure and rigidity deteriorate due to limited hydroxyl functionality and compatibility issues
Solution Approach 1:
The patent introduces a specific surfactant system comprising a silicone surfactant and a lecithin surfactant as intermediaries to mediate between the polar soy polyol and the non-polar foam matrix. This surfactant combination resolves the compatibility issue by providing both polar and non-polar interaction capabilities, allowing soy polyol to function effectively without compromising foam rigidity or structure
2Strength
If polar components (glycerol, glycols) are added to soy polyols to improve foam properties, then foam structure is improved, but phase separation occurs over time reducing long-term stability
Solution Approach 1:
The lecithin surfactant acts as an intermediary that stabilizes the interface between polar and non-polar phases. Its amphiphilic structure with both hydrophilic and lipophilic portions prevents phase separation by maintaining homogeneous distribution of polar components throughout the foam matrix, eliminating the need for additional polar additives that cause instability
3Reliability
If multiple surfactants are used to achieve desired foam properties, then foam quality is improved, but system complexity increases
Solution Approach 1:
The patent combines a silicone surfactant and a lecithin surfactant in specific proportions (silicone surfactant: 1-10 parts, lecithin surfactant: 90-99 parts by weight) to create a synergistic system. This merged surfactant system achieves superior foam quality with enhanced rigidity, stability, and cell structure while maintaining manageable complexity through defined compositional ranges
4Stability of the object's composition
If lecithin is used without aliphatic solvents, then solubility is improved, but lecithin requires modification or combination with other surfactants to improve functionality
Solution Approach 1:
The patent combines lecithin with a silicone surfactant in a specific weight ratio (90-99% lecithin, 1-10% silicone surfactant) to achieve both solubility and enhanced functionality. This combination allows the lecithin-based surfactant system to function effectively without requiring aliphatic solvents or complex modifications, as the silicone component complements the lecithin's surfactant properties
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 emulsifier system effectively solubilizes polar solvents in non-polar liquids, improving the stability and consistency of polyurethane foams made with natural oil polyols, addressing compatibility issues and phase separation, and achieving desired physical properties such as porosity and cell size.
Implementation Method 1
Lecithin is a complex mixture of phospholipids and other components such as glycerol lipids. The use of standard fluid lecithin typically requires an aliphatic solvent to remain in solution. Without the use of such solvent, lecithin is typically modified or combined with other surfactants in order to improve functionality.
Implementation Method 2
A composition comprises lecithin, a plasticizer, and an emulsifier. In another embodiment, uses of the composition for solubilizing polar solvents in non-polar liquids are also disclosed.
Data Source
AI summary
The present disclosure is directed to compositions having lecithin, a plasticizer, and an emulsifier. The composition may be used solubilize polar solvents in non-polar liquids. Methods of producing and using the compositions disclosed herein are also disclosed.