Polyacrylate Water-Absorbing Polymer for Cosmetic Wrinkle Concealment
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Solution Overview
Problem
Existing cosmetics for concealing wrinkles and pores often result in an unnatural finish, are difficult to apply, or require multiple steps, and may have usability issues such as stickiness or restricted movement, while also requiring high concentrations of water-absorbing polymers.
Innovation Solution
A cosmetic using a polyacrylate water-absorbing polymer with specific water absorption capacity, average swollen particle size of 10 to 150 µm, and average dry particle size of 10 to 50 µm, providing effective concealment of wrinkles and pores with improved compatibility and usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high refractive index powders such as titanium oxide are used for concealing wrinkles, then concealing power is improved, but the finish becomes unnatural
Solution Approach 1:
The patent changes the refractive index parameter of the powder from high (titanium oxide) to low (close to skin), and changes the particle size parameter to 1-10 μm, achieving natural finish while maintaining concealing effect through the water-absorbing polymer mechanism
Solution Approach 2:
The water-absorbing polymer acts as an intermediary that fills wrinkles and pores, creating a smooth surface that allows low refractive index powder to provide natural finish while still achieving concealment through the filling effect
2Reliability
If silicone film forming agents are used to stretch wrinkles, then wrinkle concealment is improved, but usability deteriorates due to sticky feeling and restricted muscular movement
Solution Approach 1:
The patent uses a water-absorbing polymer that provides temporary wrinkle filling during the wear period, replacing the long-lasting but restrictive silicone film, achieving wrinkle concealment without compromising usability
Solution Approach 2:
The patent changes from using film-forming agents that create continuous films to using water-absorbing polymer particles that absorb water and expand to fill wrinkles, changing the mechanism from film formation to particle-based filling, thus avoiding sticky feeling and restricted movement
3Reliability
If water-absorbing polymer is used to conceal skin unevenness in a two-step method, then concealing effect is improved, but application time and effort increase
Solution Approach 1:
The patent combines the water-absorbing polymer concealing function with the makeup cosmetic into a single integrated product, eliminating the need for separate application steps while maintaining the wrinkle-filling concealing effect
Solution Approach 2:
The makeup cosmetic is designed to perform multiple functions simultaneously: providing color, coverage, and wrinkle concealment through the incorporated water-absorbing polymer, reducing the number of separate products and steps needed
4Reliability
If high content of water-absorbing polymer (10% by mass or more) is used, then concealing effect is improved, but formulation complexity and cost increase
Solution Approach 1:
The patent optimizes the particle size parameter of the water-absorbing polymer to 1-10 μm, which enhances the concealing effect per unit mass, allowing reduction of the overall polymer content while maintaining or improving the concealing performance
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 effectively conceals skin unevenness, including wrinkles and pores, while maintaining good compatibility with makeup products and reducing application time and effort, with optimal particle size and water absorbency ranges ensuring a smooth, natural finish.
Implementation Method 1
a polyacrylate water-absorbing polymer which has an average swollen particle size of 10 to 150 μm, an average dry particle size of 10 to 50 μm and a water absorbency of 5 to 50 g/g
Data Source
AI summary
A subject of the present invention is to provide a cosmetic for unevenness correction which has an excellent effect of concealing wrinkles and pores and correcting skin unevenness and has good compatibility with a makeup cosmetic. The present inventors have found that the cosmetic for unevenness correction which conceals wrinkles and pores and has good compatibility with a makeup cosmetic at the time of application can be easily provided by using a polyacrylate water-absorbing polymer having a specific water absorption capacity, but not a water-soluble macromolecule having a thickening effect commonly used in cosmetics, and they thus have completed the present invention. That is, the present invention provides a cosmetic for unevenness correction comprising the polyacrylate water-absorbing polymer which has an excellent effect of concealing wrinkles and pores, and the polyacrylate water-absorbing polymer has an average swollen particle size of 10 to 150 µm, an average dry particle size of 10 to 50 µm and a water absorbency of 5 to 50 g/g.