Cleansing Composition Reducing Slippery Skin Feel
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Solution Overview
Problem
Liquid cleansing compositions, such as shower gels and body washes, often produce a slippery feel on the skin, which is undesirable in regions where bar soap is predominant, while maintaining lather production is a priority.
Innovation Solution
An aqueous cleansing composition comprising alkali metal or ammonium alkyl ether sulfate, betaine surfactant, fatty acid amide, and polyethylene glycol, with specific weight percentages and molecular weights, reduces the slippery skin feel without compromising lather production, especially when combined with soap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If liquid cleansing compositions use conventional surfactant mixtures, then lather production is maintained, but slippery skin feel occurs which is undesirable in bar soap predominant regions
Solution Approach 1:
The invention changes the chemical composition parameters by introducing polyethylene glycol (specifically PEG 1450) at 1.2 wt% into the surfactant system. This parameter change modifies the skin feel properties while maintaining lather production, resolving the contradiction between reducing slippery feel and maintaining productivity.
Solution Approach 2:
The invention creates a composite surfactant system combining three different surfactant types (alkyl ether sulfate, betaine, and fatty acid amide) with polyethylene glycol. This composite material approach allows the system to simultaneously achieve reduced slippery skin feel and maintained lather production, addressing both sides of the contradiction.
2Adaptability or versatility
If liquid cleansing compositions aim to reduce slippery skin feel, then bar soap user acceptance improves, but lather production may be compromised
Solution Approach 1:
By adjusting the surfactant composition parameters to include specific ratios of alkyl ether sulfate (5-9 wt%), betaine (0.5-3.5 wt%), fatty acid amide (0.1-1 wt%), and adding polyethylene glycol (1.2 wt%), the invention achieves both reduced slippery feel for bar soap user acceptance and maintained lather production.
Solution Approach 2:
Polyethylene glycol acts as an intermediary substance that modifies the interaction between the surfactant system and the skin. It mediates the skin feel properties to reduce slipperiness while allowing the surfactants to continue producing lather, thus enabling both adaptability to bar soap users and maintained productivity.
Data Source
AI summary
Described herein are liquid cleansing compositions having a reduced slippery skin feel comprising a) surfactants comprising (i) an alkali metal or ammonium alkyl ether sulfate, (ii) a betaine surfactant and (iii) a fatty acid amide; and b) polyethylene glycol.