Pentaerythritol Ester Emulsions for Mild Cleansing
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Solution Overview
Problem
Existing skin cleansers often lack mildness, sensory appeal, and irritation-free properties, particularly in formulations for anti-wrinkle and anti-acne applications, as they tend to break or cause skin irritation.
Innovation Solution
The development of oil-in-water emulsions containing specific combinations of pentaerythritol esters, dipentaerythritol esters, and polar oils, which provide a stable, non-irritating, and effective cleansing experience without the need for high amounts of surfactants, while incorporating retinoids for anti-acne and anti-wrinkle benefits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If conventional surfactants are used for cleaning, then cleaning effect is achieved, but skin irritation increases and mildness decreases
Solution Approach 1:
The invention changes the chemical parameters of the cleansing system by replacing conventional surfactants with pentaerythritol esters and dipentaerythritol esters. These ester-based components have different molecular structures and surface properties that provide cleansing action with significantly reduced skin irritation, achieving mildness while maintaining cleaning effectiveness.
Solution Approach 2:
The invention uses composite ester materials formed by reacting pentaerythritol or dipentaerythritol with specific fatty acid mixtures (containing C16 and C18 fatty acids). This composite approach creates unique molecular structures that combine cleansing properties with skin-friendly characteristics, resolving the contradiction between cleaning power and mildness.
2Stability of the object's composition
If waxes with melting point above 30°C are used, then emulsion stability improves, but sensory profile and skin feel deteriorate
Solution Approach 1:
The invention optimizes the melting point parameter of the wax component by selecting pentaerythritol esters and dipentaerythritol esters with melting points between 30-80°C. This specific parameter range ensures the emulsion remains stable at room temperature while melting at body temperature to provide a pleasant sensory profile and non-greasy skin feel.
Solution Approach 2:
The invention applies different functional properties to different temperature conditions: at room temperature, the esters maintain a solid-wax structure for emulsion stability, while at skin temperature (above 30°C), they transition to a liquid state providing smooth sensory properties and easy spreadability.
3Quantity of substance
If nonionic surfactants are added to solubilize perfume oils, then solubility improves, but irritation potential increases
Solution Approach 1:
The invention uses minimal amounts of nonionic surfactants (0-0.7% by weight) only when necessary for solubilizing perfume oils or oil-like substances. This limited, targeted use achieves the required solubility while minimizing the cumulative irritation potential that would result from higher concentrations or continuous use.
Solution Approach 2:
The invention uses small amounts of nonionic surfactants as intermediary substances to bridge the incompatibility between water and oil-like perfume components. These surfactants act as mediators that enable solubility without requiring high concentrations, thus reducing irritation while achieving the desired solubilization effect.
4Reliability
If cleansing compositions are formulated for anti-wrinkle and anti-acne effects, then therapeutic benefits improve, but formulation complexity and risk of breaking increase
Solution Approach 1:
The invention creates a multi-functional cleansing composition that simultaneously provides cleaning, anti-wrinkle, and anti-acne effects. The pentaerythritol ester and dipentaerythritol ester base components serve multiple purposes: they act as gentle cleansers, emollients, and carriers for active ingredients like retinoids, reducing formulation complexity while achieving multiple therapeutic benefits.
Solution Approach 2:
The invention merges multiple functional components into a unified formulation system. The ester-based cleansers are combined with retinoids and other active ingredients in a single stable emulsion matrix, eliminating the need for separate products and reducing the complexity of using multiple treatments while achieving comprehensive skin care benefits.
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 emulsions offer long-term stability, a pleasant sensory profile, effective cleaning, and minimized irritation, supporting both anti-acne and anti-wrinkle effects with improved skin feel and sun protection through the incorporation of UV filters.
Implementation Method 1
oil-in-water emulsions which contain (a) 1 - 10% by weight of at least one wax component with a melting point of at least 30 °C, selected from the group of pentaerythritol esters and / or the dipentaerythritol ester
Implementation Method 2
the wax component being selected from the group of esters which are produced by reacting the pentaerythritol or dipentaerythritol with a fatty acid mixture containing 40 - 50% by weight of C16 fatty acid and 45 - 55% by weight of C18- Fatty acid
Implementation Method 3
nonionic surfactants / emulsifiers in a total amount of 0 - 0.7% by weight, based on the total weight of the emulsion, for cleaning the skin
Implementation Method 4
incorporation of UV filters
Data Source
AI summary
The present invention relates to oil-in-water emulsions containing: a) 0.1 - 10 % by weight of at least one wax component having a melting point of at least 30 °C selected from the group of pentaerythritol esters, dipentaerythritol esters and/or tripentaerythritol esters and mixtures thereof, b) 1 - 30 % by weight of at least one oil component which is liquid at 25 °C, and c) 40 - 95 % by weight water and use thereof for cleansing.