Silicone Elastomer Substantivity in Cosmetics
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Solution Overview
Problem
There is a need to improve the substantivity of silicone elastomers on keratinous substrates and to develop compositions that provide enhanced sensory profiles and formulation versatility for cosmetic and personal care products, while also addressing issues of dispersivity and rheology modification.
Innovation Solution
The development of compositions comprising silicone elastomers with specific moieties and additives, which include a reaction product of siloxanes with pendant anhydride groups and organic polyols or amines, allowing for cross-linking and the formation of elastomers with improved properties such as film forming, substantivity, and sensory characteristics like a velvety feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If silicone elastomers are used in cosmetic compositions, then sensory profile and film forming properties are improved, but substantivity on keratinous substrates is insufficient
Solution Approach 1:
The patent modifies the chemical parameters of silicone elastomers by incorporating specific functional groups (carboxyl, hydroxyl, amine) and controlling molecular weight, crosslink density, and side chain composition to enhance substantivity while preserving sensory properties
Solution Approach 2:
The patent creates composite elastomer systems combining silicone base polymers with functional additives and crosslinking agents to achieve both good sensory profile and improved substantivity on keratinous substrates
2Reliability
If elastomers with improved substantivity are developed, then durability is enhanced, but formulation versatility is limited
Solution Approach 1:
The patent develops elastomers with multiple functional groups (carboxyl, hydroxyl, amine) that can interact with various cosmetic ingredients and substrates, enabling the same elastomer system to be used across different product types and formulations while maintaining improved substantivity
3Manufacturing precision
If powder dispersivity is improved, then cosmetic performance is enhanced, but formulation complexity increases
Solution Approach 1:
The patent modifies the surface chemical parameters of powders through silane treatment and functional group incorporation, improving dispersivity in cosmetic formulations through chemical modification rather than complex physical processing methods
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
These compositions enhance the sensory profile and substantivity of cosmetic products, improve dispersivity, and provide versatile formulation options, resulting in improved cosmetic and personal care formulations with enhanced durability and long-lasting wear.
Implementation Method 1
the elastomer has at least two siloxy groups and at least one carboxyl group and is the reaction product of a reaction of a first component, a second component, and a third component. The first component has at least one reactive group. The second component also has at least one reactive group. The third component has at least two reactive groups reactive with the reactive groups of the first and second components for linking (e.g. cross-linking) the first component to the second component.
Data Source
AI summary
A composition is provided that includes an elastomer and an additive. The additive stabilizes the elastomer, although it may be useful for an alternate or additional purpose. The elastomer can have a moiety according to the general formula: A-B-A or B-A-B. Each A independently comprises a polysiloxane moiety having at least two siloxy (Si—O) groups. Each B independently comprises a moiety, or a precursor thereof, having at least one carboxyl group. B is bonded to a silicon atom in A. The elastomer may comprise the reaction product of a reaction of: a first component having at least one reactive group; a second component having at least one reactive group; and a third component having at least two reactive groups reactive with the reactive groups of the first and second components. In addition, a cosmetic composition is provided that includes the elastomer, the additive, and at least one cosmetic component.