Silicone Microparticles for Non-Greasy Cosmetic Texture
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Solution Overview
Problem
Cosmetics containing silicone oils often suffer from spreading difficulties, stickiness, greasiness, and an oily film feeling, with existing solutions not adequately addressing these issues.
Innovation Solution
A cosmetic formulation incorporating silicone microparticles with a specific size range and surface-coated with polyorganosilsesquioxane, which absorb polymethylsiloxane, providing a smooth and non-greasy texture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicone oil is added to cosmetics, then moisturizing effect and softening effect are improved, but spreading difficulties and stickiness occur
Solution Approach 1:
The patent divides the silicone oil into two functional forms: silicone microparticles (solid phase) for spreading and silkiness, and volatile silicone oil (liquid phase) for moisturizing. This segmentation allows each component to perform its specific function without the drawbacks of using silicone oil alone.
Solution Approach 2:
The patent changes the physical state and distribution parameters of silicone components by using microparticles with specific size ranges (0.1-100 μm volume average diameter) and controlling the ratio between solid microparticles and liquid volatile silicone oil, thereby achieving both good spreading and moisturizing effects.
2Reliability
If silicone oil is added to cosmetics, then softening effect is improved, but greasiness and oily film feeling occur
Solution Approach 1:
The patent segments silicone functionality into solid microparticles that provide softening without grease, and separate volatile silicone oil that provides moisturizing. The microparticles' solid structure prevents the greasy feeling while maintaining softening benefits.
Solution Approach 2:
The patent applies different silicone components to different needs: silicone microparticles are used where softening is needed without added grease, while volatile silicone oil is used in controlled amounts for moisturizing. This local quality differentiation eliminates overall greasiness.
3Reliability
If volatile silicone oil is used in cosmetics, then moisturizing effect is improved, but spreading difficulty increases when silicone oil volatilizes
Solution Approach 1:
The patent applies silicone microparticles first to provide immediate spreading and silkiness, before the volatile silicone oil fully volatilizes. The microparticles remain on the skin surface to maintain smooth texture throughout the volatilization process, preventing subsequent spreading difficulties.
Solution Approach 2:
The silicone microparticles act as an intermediary between the volatile silicone oil and the skin surface. They provide a stable solid framework that maintains spreading properties while the volatile oil evaporates, mediating between the temporary liquid phase and the final dry state.
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 cosmetic achieves favorable skin and hair application feelings without spreading difficulties, stickiness, or greasiness, ensuring a silky and smooth experience.
Implementation Method 1
silicone microparticles... which absorb polymethylsiloxane
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 the surface of the silicone elastomer spherical microparticles, and the silicone elastomer is capable of absorbing not less than 200 parts by mass of a polymethylsiloxane having a viscosity at 25°C of not more than 10 mm2/s per 100 parts by mass of the silicone elastomer. Even if containing a silicone oil, the cosmetic exhibits favorable feelings upon use, with no spreading difficulties, stickiness, greasiness, or oily film feeling or the like.