Silicone Resin Cosmetic Preparation for Soft, Non-Sticky Coatings
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Solution Overview
Problem
Cosmetic preparations face challenges in achieving excellent usability with a soft coating that spreads well, has no sticky feeling, and provides resistance to sweat or water, while maintaining durability and stability over time.
Innovation Solution
A cosmetic preparation containing 1,1,1,3,5,5,5-heptamethyl-3-alkyl (C10-14) trisiloxanes and a silicone resin with an average unit formula of R a SiO (4-a)/2 and a thermal softening point of 50°C or more, where R is a substituted or unsubstituted monovalent hydrocarbon group and a is between 1.2 and 2, to ensure smooth application and resistance to sweat and water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If silicone resin with low thermal softening point is used, then the coating is soft and comfortable, but the preparation becomes sticky and usability deteriorates
Solution Approach 1:
The patent applies parameter changes by carefully selecting the thermal softening point parameter of the silicone resin to be 50°C or higher, and controlling the average unit formula parameters (a value between 1.2 and 2.0). This parameter optimization resolves the contradiction by finding the optimal range that provides both softness and non-sticky properties.
Solution Approach 2:
The patent uses composite materials by combining specific types of silicone resins with defined molecular structures (containing R2SiO2/2 units, R3SiO1/2 units, and/or RSiO3/2 units) to achieve a material that simultaneously provides soft coating characteristics and resistance to stickiness, thus resolving the contradiction between softness and usability.
2Ease of operation
If silicone resin with high thermal softening point is used, then the preparation is not sticky and usability is good, but the coating becomes hard and comfort decreases
Solution Approach 1:
The patent resolves this contradiction by precisely controlling the thermal softening point parameter at 50°C or higher (but not excessively high), and by adjusting the average unit formula parameters (a = 1.2 to 2.0). This parameter optimization ensures the coating remains soft while maintaining good usability without stickiness.
Solution Approach 2:
The patent employs composite materials with specific silicone resin compositions containing controlled ratios of R2SiO2/2 units, R3SiO1/2 units, and/or RSiO3/2 units. This composite approach achieves the balance between providing a soft coating feel and maintaining non-sticky properties for good usability.
3Ease of manufacture
If conventional silicone resins are used, then the preparation is easy to manufacture, but water resistance and sweat resistance are insufficient
Solution Approach 1:
The patent applies composite materials by using silicone resins with specific molecular structures containing R2SiO2/2 units, R3SiO1/2 units, and/or RSiO3/2 units in controlled proportions. This composite silicone resin structure provides both ease of manufacture and superior water resistance and sweat resistance, resolving the contradiction between manufacturability and reliability.
Solution Approach 2:
The patent resolves this contradiction by changing the chemical composition parameters of the silicone resin, specifically controlling the average unit formula (RaSiO(4-a)/2 where a = 1.2 to 2.0) and thermal softening point (≥50°C). These parameter changes enhance water and sweat resistance while maintaining manufacturability.
4Ease of operation
If the cosmetic preparation is made to spread well, then the application is easy, but the coating may become sticky and comfort decreases
Solution Approach 1:
The patent resolves this contradiction by optimizing the parameter of thermal softening point at 50°C or higher and controlling the average unit formula parameters (a = 1.2 to 2.0). These parameter changes enable the preparation to spread easily while preventing the formation of a sticky coating, thus achieving both good spreading properties and comfort.
Solution Approach 2:
The patent uses composite materials with specific silicone resin compositions containing controlled ratios of R2SiO2/2 units, R3SiO1/2 units, and/or RSiO3/2 units. This composite structure allows the preparation to spread well across the skin while maintaining a non-sticky, comfortable coating feel.
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 preparation spreads well, feels soft on the skin, and maintains makeup integrity even with sweat or water exposure, offering good usability and stability.
Implementation Method 1
a cosmetic preparation that contains a fluorine group-containing silicone resin... excellent in water resistance or sweat resistance
Data Source
AI summary
To provide a cosmetic preparation attaining excellent usability by spreading well, having no sticky feeling, and providing a soft coating, the preparation containing the following components (A) and (B): (A) one or two or more selected from 1,1,1,3,5,5,5-heptamethyl-3-alkyl (C10-14) trisiloxanes; and (B) a silicone resin having an average unit formula of RaSiO(4-a)/2 and a thermal softening point of 50°C or more, wherein R represents the same or different substituted or unsubstituted monovalent hydrocarbon groups, and a is a number from 1.2 to 2.