Sequential Hair Conditioning with Cationic Polymers and Organosilanes
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Solution Overview
Problem
Existing hair care compositions provide temporary conditioning and detangling properties that diminish after washing, requiring frequent reapplication to maintain desired hair health.
Innovation Solution
A method involving a sequential application of a cosmetic composition containing cationic surfactants, silicones, and non-silicone fatty substances, followed by a composition with cationic polymers and organosilanes without an intermediate rinsing step, to provide persistent conditioning and detangling benefits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a single hair care composition with organosilanes is used, then conditioning properties are provided immediately, but the properties diminish after washing and require frequent reapplication
Solution Approach 1:
The invention divides the hair treatment into two sequential applications: first composition (with cationic surfactants, silicones, and non-siliconized fats) and second composition (with cationic surfactants, cationic polymers, and organosilanes). This segmentation allows each composition to contribute different conditioning mechanisms that work synergistically, with the first composition providing immediate conditioning and the second composition providing lasting effects that withstand washing.
Solution Approach 2:
The first composition is applied before the second composition to prepare the hair surface. The silicones and fats in the first composition create an initial conditioning layer that is then enhanced by the organosilanes and cationic polymers in the second composition. This preliminary action ensures that the subsequent application of organosilanes can form durable bonds with the hair keratin, leading to long-lasting conditioning that resists washing.
2Duration of action of moving object
If multiple compositions are applied sequentially, then lasting conditioning properties are achieved, but the treatment process becomes more complex
Solution Approach 1:
Each composition combines multiple active ingredients with complementary functions: the first composition merges cationic surfactants (for detangling), silicones (for immediate smoothness), and non-siliconized fats (for moisture). The second composition merges cationic surfactants, cationic polymers (for film formation and durability), and organosilanes (for chemical bonding to keratin). This merging of functions within each composition simplifies the overall process compared to using multiple single-function products.
Solution Approach 2:
The two compositions are designed to work continuously and synergistically without interruption. The first composition establishes immediate conditioning, and the second composition builds upon this foundation to create lasting effects. The continuous action from application through washing is maintained because the organosilanes and cationic polymers form durable films and bonds that persist through the washing process, eliminating the need for intermediate reapplication.
3Reliability
If organosilanes are used alone, then conditioning properties are provided, but detangling ability and resistance to washing are insufficient
Solution Approach 1:
The invention creates a composite conditioning system where organosilanes work in combination with cationic surfactants, silicones, and cationic polymers. The cationic surfactants provide detangling through electrostatic interaction with negatively charged hair surfaces, while organosilanes provide chemical bonding to keratin for washing resistance. The cationic polymers form protective films that enhance both detangling and durability. This composite approach allows the system to simultaneously achieve excellent detangling ability and high resistance to washing.
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 method achieves immediate and long-lasting hair conditioning, maintaining flexibility, smoothness, and detangling ability even after multiple shampoos, resisting external damage and wear.
Implementation Method 1
applying in a sequential manner, a cosmetic composition called first, comprising one or more cationic surfactants, one or more silicones and one or more non-siliconized fats
Implementation Method 2
a cosmetic composition called second, comprising one or more cationic surfactants, one or more cationic polymers having a cationic charge density greater than or equal to 4 meq/g, and one or more organosilanes
Implementation Method 3
said process not comprising an intermediate rinsing step between said application step (i) and step (ii)
Data Source
AI summary
The invention relates to a method for cosmetic treatment of the hair, in particular for care and/or cleaning, including: a step (i) of applying to said hair a cosmetic composition, referred to as the first cosmetic composition, including one or more cationic surfactants, one or more silicones and one or more non-siliconized fatty substances; and then a step (ii) of applying to said hair a cosmetic composition, referred to as the second cosmetic composition, including one or more cationic surfactants, one or more cationic polymers having a cationic charge density no lower than 4 meq/g, and one or more organosilanes. Said method makes it possible, in particular, to obtain conditioning that is both instant and long-lasting.