Anhydrous Silicone Elastomer Makeup Composition for Uniform Skin Coverage
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Solution Overview
Problem
Existing cosmetic compositions with silicone elastomers possessing carboxylic acid functions have a difficult texture that is hard to apply and result in non-uniform skin coverage, highlighting imperfections due to accumulation in pores and wrinkles.
Innovation Solution
An anhydrous composition comprising volatile hydrocarbon oil and dodecamethylpentasiloxane, combined with a silicone elastomer possessing carboxylic acid functions, provides a smooth, supple, and homogeneous consistency for easy application on the skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicone elastomers possessing carboxylic acid functions are used in cosmetic compositions, then wear property and durability are improved, but texture becomes difficult to apply and spread
Solution Approach 1:
The patent changes the chemical parameters of the silicone elastomer by introducing carboxylic acid functions with specific equivalent weights (50-2000, preferably 100-500), which modifies the polymer's interaction properties to improve both texture and wear resistance simultaneously
Solution Approach 2:
The patent creates a composite system combining silicone elastomers with carboxylic acid functions with specific oils and optional crosslinking agents, where the synergistic interaction between components resolves the texture-application problem while maintaining durability
2Quantity of substance
If pigments and fillers are used at high amounts to enhance coverage, then cosmetic coverage is improved, but uniformity of deposit deteriorates
Solution Approach 1:
The patent modifies the rheological parameters of the composition by adjusting oil content (5-50 wt%) and using specific viscosity modifiers, which enables high pigment loading while maintaining uniform spreadability and preventing accumulation in skin reliefs
Solution Approach 2:
The patent uses oils and silicone elastomers as intermediary substances that facilitate uniform distribution of pigments and fillers across the skin surface, preventing direct aggregation of pigment particles and ensuring homogeneous deposit
Data Source
AI summary
The present invention relates to an anhydrous composition for caring for and/or making up keratin materials, in particular the skin, comprising, preferably in a physiologically acceptable medium: a) an oily phase comprising i) at least one volatile hydrocarbon oil H1 and ii) dodecamethylpentasiloxane; and b) at least one silicone elastomer possessing carboxylic acid functions. The invention also relates to a method for coating keratin materials, more particularly for making up and/or caring for keratin materials, such as the skin, characterized in that it comprises the application to keratin materials of an emulsion as defined above.