Silicone Microparticles for Sebum Absorption in Cosmetics
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Solution Overview
Problem
Cosmetics containing oily components face issues such as spreading difficulties, stickiness, greasiness, and changes in properties due to sebum secretion, leading to inadequate sebum absorption and shine control.
Innovation Solution
A cosmetic formulation incorporating silicone microparticles with a volume average particle diameter of 0.1 to 100 µm, coated with polyorganosilsesquioxane, which absorbs at least 30 parts by mass of sebum or other oily substances, creating an oily gel composition to address these issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional unctuous agents are used to achieve protection and moisturizing effects, then softening and smoothing effects are improved, but spreading difficulties and greasiness occur
Solution Approach 1:
The patent changes the physical state and surface properties of the unctuous agent by incorporating silicone microparticles with specific surface treatments. The microparticles have a volume average diameter of 0.1 to 100 µm and are coated with polyorganosilsesquioxane, which modifies the interaction between the unctuous agent and skin, improving spreadability while reducing greasiness.
Solution Approach 2:
The patent creates a composite system combining unctuous agents with silicone microparticles. The microparticles themselves are composite structures with a core of cured silicone rubber and a cladding layer of polyorganosilsesquioxane resin, providing multiple functions: protection, softening, and improved spreadability without greasiness.
2Ease of operation
If unctuous agents are used to provide moisturizing effects, then softening is improved, but stickiness and oily film feeling increase
Solution Approach 1:
The patent modifies the physical parameters of the unctuous agent formulation by incorporating microparticles with specific size distributions (0.1 to 100 µm volume average diameter) and surface coatings. This changes the rheological properties and skin interaction characteristics, providing softening while reducing stickiness and oily film feeling.
3Object-generated harmful factors
If sebum-absorbing powders are mixed into makeup cosmetics to control shine, then shine reduction is attempted, but sebum remains adsorbed on powder surfaces rather than being absorbed
Solution Approach 1:
The patent utilizes the porous structure of silicone microparticles to absorb sebum. The microparticles have a three-dimensional porous network structure that allows sebum to penetrate into the interior, not just adsorb on the surface. This provides reliable and effective sebum absorption, controlling shine while maintaining cosmetic properties.
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 formulation provides a smooth, non-sticky, and non-greasy feel while effectively managing sebum-related problems, maintaining cosmetic properties and reducing shine.
Implementation Method 1
the silicone elastomer is capable of absorbing not less than 30 parts by mass of at least one oily substance selected from the group consisting of sebum, hydrocarbon oils and ester oils per 100 parts by mass of the silicone elastomer
Implementation Method 2
0.5 to 25 parts by mass of a polyorganosilsesquioxane that coats the surface of the silicone elastomer spherical microparticles
Data Source
AI summary
Provided is a cosmetic including silicone microparticles, in which the silicone microparticles include 100 parts by mass of silicone elastomer spherical microparticles having a volume average particle diameter within a range from 0.1 to 100 µm, and 0.5 to 25 parts by mass of a polyorganosilsesquioxane that coats a surface of the silicone elastomer spherical microparticles, and the silicone elastomer is capable of absorbing not less than 30 parts by mass of at least one oily substance selected from the group consisting of sebum, hydrocarbon oils and ester oils per 100 parts by mass of the silicone elastomer. Even if containing an unctuous agent, the cosmetic exhibits favorable feelings upon use, with no spreading difficulties, stickiness, greasiness, oily film feeling, or the like, and is also capable of suppressing problems caused by sebum, namely, changes in the makeup cosmetic properties of the cosmetic, changes in the color of the cosmetic, increased shine, and the like.