Mascara Composition with Thermoplastic Elastomer and Semi-Crystalline Polymer
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Solution Overview
Problem
Current mascara formulations with high wax content and film-forming polymers provide long wear and transfer resistance but are difficult to spread and often leave a tacky feeling, failing to achieve stable and desirable curling effects on eyelashes.
Innovation Solution
A cosmetic composition comprising a dispersion of acrylic polymer particles, a thermoplastic elastomer, and a semi-crystalline polymer in an organic solvent, without water and hard waxes, which provides a stable curling effect by optimizing the ratio of these components for improved spreadability and curling performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high wax content (10-25%) and film-forming polymers are used, then long wear and transfer resistance are achieved, but the product becomes difficult to spread and leaves a tacky feeling
Solution Approach 1:
The invention changes the chemical composition parameters by replacing water and hard waxes with an organic solvent system containing thermoplastic elastomer and semi-crystalline polymer. This parameter change maintains film-forming capability and wear resistance while eliminating the tacky feeling and improving spreadability, as the organic solvent system provides different rheological properties compared to water-based systems with hard waxes.
Solution Approach 2:
The invention uses a composite material system combining thermoplastic elastomer and semi-crystalline polymer in an organic solvent. This composite approach provides both the durability of film-forming polymers and the spreadability of elastomeric materials, resolving the contradiction between long wear and ease of application.
2Reliability
If water and hard waxes are used in mascara formulation, then long wear properties are achieved, but the curling effect is unstable and undesirable
Solution Approach 1:
The invention changes the formulation parameters by eliminating water and hard waxes, replacing them with an organic solvent system containing thermoplastic elastomer and semi-crystalline polymer. This parameter change stabilizes the curling effect while maintaining long wear properties, as the organic solvent system provides better control over film formation and polymer behavior on the lash.
3Reliability
If film-forming polymers and combinations of different waxes are used, then transfer resistance is improved, but the product becomes difficult to spread
Solution Approach 1:
The invention employs a composite material system where thermoplastic elastomer provides flexibility and spreadability, while semi-crystalline polymer contributes to film formation and transfer resistance. The organic solvent system acts as a matrix that allows easy application while maintaining the protective film properties, thus resolving the contradiction between spreadability and transfer resistance.
Data Source
AI summary
The present invention relates to a cosmetic composition comprising a dispersion of acrylic polymer particles, a thermoplastic elastomer, a semi-crystalline polymer and an organic solvent. The compositions of the present invention may optionally contain at least one colorant. The invention also relates to a method for making up and/or enhancing the appearance of a keratinous substrate, in particular lashes, by applying these compositions to the keratinous substrate.