Polyglycerol Partial Esters for Clear Solubilization
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Solution Overview
Problem
Existing polyglycerol partial esters struggle to clearly solubilize relatively polar oils, such as essential and perfume oils, in water or aqueous formulations, especially in aluminum chlorohydrate-containing formulations, and often result in opaque or viscous products that are difficult to formulate.
Innovation Solution
Polyglycerol partial esters are synthesized by esterifying polyglycerol with a carboxylic acid mixture comprising short-chain dicarboxylic acids and saturated fatty acids, optimizing the molar ratio to improve solubilization and processability, resulting in clear, stable dispersions with reduced viscosity and minimal foam production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If polyglycerol partial esters with high dicarboxylic acid content are used to solubilize oils, then oil solubilization is achieved, but the formulation becomes opaque and exhibits opalescence
Solution Approach 1:
The patent changes the chemical composition parameters by using short-chain dicarboxylic acids (2-12 carbon atoms) instead of traditional long-chain dicarboxylic acids, and optimizes the molar ratio of polyglycerol to dicarboxylic acid to saturated fatty acid to achieve clear solubilization without opalescence
Solution Approach 2:
The invention creates a composite polyglycerol partial ester containing both dicarboxylic acid groups and saturated fatty acid groups in specific proportions, combining the solubilization capability of dicarboxylic acids with the clarity-providing properties of saturated fatty acids
2Quantity of substance
If polyglycerol partial esters are used to solubilize perfume oils in aluminum chlorohydrate-containing formulations, then solubilization is attempted, but the formulation becomes opaque or phase separation occurs
Solution Approach 1:
The patent optimizes the molar ratio parameters and introduces specific functional groups (short-chain dicarboxylic acids) that enhance compatibility with aluminum chlorohydrate and other electrolytes, preventing phase separation and maintaining clarity in challenging formulation environments
Solution Approach 2:
The invention uses small amounts of the specially designed polyglycerol partial ester to achieve effective solubilization, making it efficient for use in formulations with high electrolyte content where traditional solubilizers would require large amounts and cause opacity
3Quantity of substance
If conventional polyglycerol partial esters are used as solubilizers, then oil solubilization is achieved, but the products exhibit high viscosity and are difficult to formulate
Solution Approach 1:
The patent changes the molecular structure parameters by incorporating saturated fatty acids with 6-14 carbon atoms and optimizing the molar ratios, which reduces the viscosity of the polyglycerol partial ester while maintaining its solubilization effectiveness, thereby improving processability and ease of formulation
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 new polyglycerol partial esters effectively solubilize hydrophobic substances in water, provide a pleasant skin feel, reduce skin irritation, and stabilize emulsions, while being easy to process and compatible with electrolytes, leading to improved cosmetic formulations with enhanced clarity and stability.
Implementation Method 1
esterification of a polyglycerol with a carboxylic acid mixture comprising: a) comprising at least one short-chain dicarboxylic acid comprising 2 to 12, preferably 3 to 8, particularly preferably 4, carbon atoms, and b) comprising at least one saturated fatty acid comprising 6 to 14, preferably 8 to 10, carbon atoms
Data Source
AI summary
The invention relates to polyglycerol partial esters based on mono- and dicarboxylic acids and their use as solubilizers, particularly in cosmetics, for example for perfume oils and essential oils in aqueous systems.