Sugar and Polyglycerol Ester Cleansing Composition for Easy Rinsing
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Solution Overview
Problem
Existing cleansing compositions face challenges in achieving a balance between high cleansing effectiveness, pleasant skin feel, ease of rinse-off, and preservation stability, often with issues like oil film persistence and phase inversion feelings.
Innovation Solution
A cleansing composition comprising a sugar ester of a fatty acid, an anionic surfactant, polyglycerol fatty acid diesters and monoesters, an oil, a polyol, and water, with specific mass ratios and HLB values to enhance cleansing power, phase inversion feeling, and ease of rinse-off while maintaining stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water-in-oil type or oil-based cleaning cosmetic preparations are used to achieve high cleansing effect, then cleansing power is improved, but the feeling of use deteriorates due to stickiness and non-easiness of rinse-off with water
Solution Approach 1:
The patent changes the emulsion type parameter from water-in-oil to oil-in-water, fundamentally altering the dispersion phase and continuous phase relationship. This parameter change enables the formulation to maintain high oil content (40-80 mass%) for effective makeup removal while achieving easy water rinsability and reduced stickiness, as the oil droplets are dispersed in a water-continuous phase that facilitates easy removal with water
Solution Approach 2:
The patent employs a composite surfactant system combining multiple types of surfactants (anionic, nonionic, and/or amphoteric) with specific HLB value ranges (7-18). This composite approach creates synergistic effects that stabilize the oil-in-water emulsion while providing both high cleansing power and easy rinse-off properties, resolving the contradiction between effective oil removal and easy water rinsability
2Ease of operation
If oil-in-water type cleaning cosmetic preparations are used to achieve good feeling of use, then ease of rinse-off is improved, but cleansing effect deteriorates due to low oil content
Solution Approach 1:
The patent increases the oil content parameter to 40-80 mass% within the oil-in-water emulsion formulation, which is significantly higher than conventional oil-in-water cleansers. This parameter change enables the product to maintain the easy rinse-off and pleasant feeling of use characteristic of oil-in-water types while achieving high cleansing power comparable to or exceeding water-in-oil types through the large amount of oil available for makeup removal
3Reliability
If a large amount of oil is added to improve cleansing power against high adhesiveness makeup, then cleansing effect is improved, but the feeling of oil film persistence deteriorates
Solution Approach 1:
The patent optimizes the HLB value parameter of the surfactant system to ranges of 7-18 (with specific combinations including anionic surfactants with HLB 8-18, nonionic surfactants with HLB 7-16, and amphoteric surfactants with HLB 6-14). This HLB optimization ensures that the high oil content (40-80 mass%) is properly emulsified and dispersed, preventing excessive oil film persistence on the skin while maintaining effective cleansing power against waterproof and high-adhesiveness makeup
4Ease of operation
If emulsion-type cleansing cosmetic preparations applying D-phase emulsification are used to achieve both cleansing effect and good feeling of use, then phase inversion feeling is improved, but preservation stability deteriorates at high and low temperatures
Solution Approach 1:
The patent employs a composite surfactant system combining multiple types of surfactants (anionic, nonionic, and/or amphoteric) with complementary HLB value ranges. This composite approach creates a more robust emulsion structure that maintains phase stability across a wider temperature range while preserving the desirable phase inversion feeling during application, thereby improving preservation stability at both high and low temperatures compared to single-surfactant systems
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 composition achieves excellent cleansing efficacy, easy rinse-off without sticky residue, and stable preservation, even with high oil content, suitable for facial and body use.
Implementation Method 1
a polyglycerol fatty acid diester or a polyglycerol fatty acid triester having an HLB value of not greater than 13; at least one type of a polyglycerol fatty acid monoester having an HLB value of not smaller than 11
Implementation Method 2
emulsion-type cleansing cosmetic preparations applying D-phase emulsification
Implementation Method 3
phase inversion feeling, which is an important indication of the feeling of use and is a feeling of increasing the smoothness of the finger by spreading the agent on the skin
Data Source
AI summary
One object is to provide a cleansing composition that has excellent cleansing effect and phase inversion feeling, is readily rinsed off in the course of water washing, suppresses the oil-induced stickiness after the use, and has excellent preservation stability. There is provided a cleansing composition comprising: (A) a sugar ester of a fatty acid; (B) at least one type of an anionic surfactant selected from among amino acid surfactants and taurine surfactants; (C) at least one type of a polyglycerol fatty acid diester or a polyglycerol fatty acid triester having an HLB value of not greater than 13; (D) at least one type of a polyglycerol fatty acid monoester having an HLB value of not smaller than 11; (B) an oil that has a liquid form or a paste (non-solid) form at ordinary temperature; (F) a polyol; and (G) water.