Powdered Solid Cosmetic Composition for Texture and Impact Resistance
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Solution Overview
Problem
Existing powdered solid cosmetics face challenges in achieving excellent texture and impact resistance simultaneously, particularly when using elastic spherical powders, which are difficult to solidify and require specific raw materials or apparatuses for improvement.
Innovation Solution
A powdered solid cosmetic formulation comprising non-elastic spherical powders with a crushing strength of 30 MPa or higher, iron oxide, a gel-type partially crosslinked organopolysiloxane polymer, and a non-ionic surfactant with an HLB of 10 or lower, ensuring uniform dispersibility and impact resistance without the need for elastic spherical powders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If elastic spherical powders are used to improve texture, then smoothness and spreadability are enhanced, but impact resistance deteriorates due to poor moldability and difficulty to solidify
Solution Approach 1:
The patent changes the key parameter of spherical powders from elastic to non-elastic type, while maintaining the spherical shape. This parameter change allows the powder to be solidified properly and achieve sufficient impact resistance, while still providing smoothness and spreadability through the spherical morphology
Solution Approach 2:
The patent creates a composite powder system by blending non-elastic spherical powder with other cosmetic ingredients including iron oxide, silicon oxide, and various oils. This composite approach allows achieving both good texture and high impact resistance that neither component could achieve alone
2Strength
If non-elastic spherical powder is blended to increase impact resistance, then moldability improves, but texture deteriorates due to conspicuous roughness
Solution Approach 1:
The patent specifies precise parameter ranges for the non-elastic spherical powder including particle size (1-30 μm average diameter), crushing strength (30-200 MPa), and spherical shape. These controlled parameters ensure the powder provides impact resistance without creating noticeable roughness on the skin surface
Solution Approach 2:
The patent uses non-elastic spherical powder as a localized component within the overall powder blend, constituting 5-50 mass% of the total powder. This localized quality approach allows the spherical powder to provide impact resistance in specific areas while other ingredients maintain the overall smooth texture
3Ease of operation
If gel-type partially crosslinked organopolysiloxane polymer is added to improve texture, then smoothness enhances, but powder dispersibility deteriorates due to aggregation
Solution Approach 1:
The patent specifies precise parameter ranges for the gel-type partially crosslinked organopolysiloxane polymer including viscosity (10-10,000 cP) and crosslinking degree (10-50%). These controlled parameters prevent excessive aggregation while maintaining the texture-improving properties of the polymer
Solution Approach 2:
The patent uses iron oxide and silicon oxide powders as intermediary components that help disperse the gel-type polymer uniformly throughout the formulation. These inorganic powders act as spacers and distribution agents, preventing the polymer from aggregating while still allowing it to provide smoothness
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, spreadable texture with improved powder dispersibility and impact resistance, avoiding aggregation and roughness, while eliminating the need for elastic spherical powders.
Implementation Method 1
a non-ionic surfactant having an HLB of 10 or lower
Data Source
AI summary
An objective of the invention is to provide a powdered solid cosmetic that has excellent powder dispersibility and high impact resistance, while also having a texture similar to that in the case in which an elastic spherical powder is blended. The powdered solid cosmetic according to the present invention contains (A) a non-elastic spherical powder having a crushing strength per particle of 30 MPa or higher; (B) 1% to 15% by mass of iron oxide; (C) a gel-type partially crosslinked organopolysiloxane polymer; and (D) a non-ionic surfactant having an HLB of 10 or lower; wherein the (A) non-elastic spherical powder constitutes 90% by mass or more of all spherical powders contained in the cosmetic.