Aqueous Hair Cleansing Agent with Polysiloxane and Cationized Polymer
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Solution Overview
Problem
Existing hair cleansing agents often fail to provide a well-balanced combination of hair volume, conditioning effects, and reduced stickiness, particularly for individuals with thin or fine hair, as they tend to weigh the hair down after drying due to residual conditioning agents.
Innovation Solution
An aqueous hair cleansing agent comprising an anionic surfactant, an organo polysiloxane with a poly(N-acyl alkylene imine) segment bound to silicon atoms, and cationized polymers such as cellulose or galactomannan, which balances hair volume, conditioning, and reduces stickiness by controlling the storage elastic modulus and adhesion properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional conditioning agents are used in hair cleansing agents, then conditioning effects are improved, but hair volume is reduced and stickiness increases due to residual weight
Solution Approach 1:
The patent changes the molecular weight parameters of the polysiloxane component, specifically using a weight-average molecular weight within 1×10^4 to 1×10^5 and controlling the mass ratio between organo polysiloxane segment and poly(N-acyl alkylene imine) segment within 65/35 to 82/18. This parameter optimization provides conditioning effects while reducing residual weight and stickiness
Solution Approach 2:
The patent creates a composite material by combining organo polysiloxane with poly(N-acyl alkylene imine) segments bound through alkylene groups containing hetero atoms, and further combines this with cationized polymers (cellulose or galactomannan derivatives). This composite structure achieves balanced conditioning effects and hair volume without excessive weight
2Ease of operation
If conditioning agents are used to improve hair manageability, then touch feel is enhanced, but hair volume and natural finish are compromised due to residue
Solution Approach 1:
The patent optimizes the molecular weight and mass ratio parameters of the polysiloxane component to achieve the right balance between manageability and volume. The weight-average molecular weight of 1×10^4 to 1×10^5 and mass ratio of 65/35 to 82/18 provide enhanced manageability while preserving hair volume
Solution Approach 2:
The patent introduces local quality by combining different functional components: the organo polysiloxane with poly(N-acyl alkylene imine) segments provides manageability, while the cationized polymers (cellulose or galactomannan) contribute to volume and natural finish. Each component performs its specific function locally without compromising overall hair volume
3Strength
If cationic polymers are added to enhance conditioning, then adhesion improves, but stickiness and residue feel increase
Solution Approach 1:
The patent controls the molecular weight and mass ratio parameters of the polysiloxane component to balance adhesion and stickiness. The weight-average molecular weight of 1×10^4 to 1×10^5 and mass ratio of 65/35 to 82/18 optimize adhesion while minimizing stickiness
Solution Approach 2:
The patent uses the organo polysiloxane with poly(N-acyl alkylene imine) segments as an intermediary between the anionic surfactant and cationized polymers. This intermediary component facilitates adhesion while preventing excessive stickiness and residue feel through its specific molecular structure and weight characteristics
Data Source
AI summary
An aqueous hair cleansing agent containing the following components (A), (B) and (C) and water:(A) an anionic surfactant;(B) a specific organo polysiloxane; and(C) one or more of cationized polymer(s) selected from (c-1) and (c-2):(c-1) a cationized polymer having cellulose skeleton or galactomannan skeleton; and(c-2) a cationic polymer having diallyl dimethylammonium salt skeleton.