Acrylic Copolymer Makeup Composition for Shiny Resistant Deposits
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Solution Overview
Problem
Existing makeup compositions containing film-forming agents often lose shine after drying, leading to uncomfortable and brittle deposits, particularly unsuitable for lip and eyelash applications, and require complex two-step processes or the addition of non-volatile oils that are not applicable to all makeup types.
Innovation Solution
A composition comprising surface-stabilized C1-C4 alkyl (meth)acrylate polymer particles, isobornyl (meth)acrylate polymer as a stabilizer, hydrocarbon-based oils, and amorphous hydrocarbon-based block copolymers, which results in non-tacky, resistant, and shiny deposits after drying, suitable for various keratin materials like lips and eyelashes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If film-forming agents are used to improve persistence, then the composition forms a cohesive film on the support, but the deposit loses its shine after drying
Solution Approach 1:
The patent changes the chemical parameters of the film-forming system by specifying particular polymers (acrylic copolymers with specific glass transition temperatures between -50°C and 0°C) and controlled particle sizes (50-500 nm). These parameter changes enable the film to maintain both persistence and shine, resolving the contradiction between film cohesion and gloss retention.
2Illumination intensity
If very glossy film-forming agents are used to maintain shine, then the deposit remains shiny, but the film becomes too rigid and brittle for lip and eyelash applications
Solution Approach 1:
The patent precisely controls the glass transition temperature parameter of the polymer between -50°C and 0°C, which optimizes the balance between film flexibility and gloss. This parameter range ensures the film remains soft and comfortable for keratin applications while maintaining shine, resolving the contradiction between gloss and flexibility.
Solution Approach 2:
The patent uses composite acrylic copolymer particles consisting of multiple monomers (including acrylic acid, methacrylic acid, and crosslinking agents) to create a material that combines flexibility with gloss. The composite structure allows the film to be both shiny and comfortable for lip and eyelash use.
3Illumination intensity
If two-step processes are used to provide both persistence and gloss, then the deposit maintains shine, but the application process becomes more complicated
Solution Approach 1:
The patent merges the functions of persistence and gloss into a single formulation by incorporating specifically engineered acrylic copolymer particles with controlled glass transition temperatures and particle sizes. This single-step solution combines what previously required two separate application steps, simplifying the process while maintaining both persistence and shine.
4Illumination intensity
If non-volatile glossy oils are added to maintain shine, then the deposit remains shiny, but the composition cannot be used for applications requiring quick drying
Solution Approach 1:
The patent changes from using volatile oils to using non-volatile acrylic copolymer particles with specific glass transition temperatures as the gloss-providing agent. This parameter change in the film-forming mechanism allows the composition to dry quickly while maintaining shine, resolving the contradiction between gloss and drying speed.
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 composition provides a comfortable, easy-to-apply, and long-lasting makeup solution that remains shiny and resistant, addressing the issues of shine loss and brittleness while maintaining persistence and comfort on keratin materials.
Implementation Method 1
It allows the composition, once applied, to form after drying a film that is more cohesive and persistent on the support
Implementation Method 2
particles of at least one polymer that is surface-stabilized with a stabilizer, the polymer of the particles being a C1-C4 alkyl (meth)acrylate polymer; the stabilizer being an isobornyl (meth)acrylate polymer
Data Source
AI summary
The present invention relates to a composition comprising particles of at least one polymer that is surface-stabilized with a stabilizer, the polymer of the particles being a C1-C4 alkyl (meth)acrylate polymer; the stabilizer being an isobornyl (meth)acrylate polymer chosen from isobornyl (meth)acrylate homopolymer and statistical copolymers of isobornyl (meth)acrylate and of C1-C4 alkyl (meth)acrylate present in an isobornyl (meth)acrylate/C1-C4 alkyl (meth)acrylate weight ratio of greater than 4, at least one hydrocarbon-based oil and at least one amorphous hydrocarbon-based block copolymer obtained by polymerization of at least one monomer of unsaturated hydrocarbon type comprising 2 to 5 carbon atoms and containing one or two ethylenic unsaturations. The invention also relates to a process for making up and/or caring for keratin materials, in which said composition is applied.