Sprayable Film Composition for Smudge Resistance and Warm-Water Removal
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Solution Overview
Problem
Long wear cosmetic products are difficult to remove without harsh chemicals, often leaving residual product in pores and requiring extensive scrubbing, while maintaining smudge and transfer resistance.
Innovation Solution
A spray-on film forming composition comprising specific ratios of acrylates/VA copolymer and acrylates copolymer in a cosmetically acceptable base, with plasticizers like butylene glycol and propanediol, allows easy removal with water above a certain temperature and maintains flexibility and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If long wear cosmetic products are used to resist smudging and transfer, then smudge and transfer resistance is improved, but ease of removal deteriorates
Solution Approach 1:
The patent changes the physical-chemical parameters of the film-forming composition by controlling the glass transition temperature (Tg) to be between -50°C and 0°C, and the melting point to be between 20°C and 40°C. These parameter adjustments allow the film to maintain stability during wear (resisting smudge and transfer) while becoming removable upon contact with warm water or body heat, thus resolving the contradiction between durability and ease of removal
Solution Approach 2:
The patent introduces dynamic properties to the cosmetic film by making its mechanical properties temperature-dependent. The film transitions from a rigid, transfer-resistant state at ambient temperature to a flexible, removable state when exposed to warm water or body heat. This dynamic behavior allows the same film to provide both long-wear performance and easy removal under different conditions
2Ease of operation
If makeup remover products are used to remove long wear cosmetics, then ease of removal is improved, but skin safety deteriorates
Solution Approach 1:
The patent converts the previously harmful property (difficulty of removal) into a beneficial feature by designing a film that is specifically engineered to be removable under controlled conditions. The film's temperature-dependent properties allow it to be easily removed with warm water, converting the need for harsh chemical removers into an opportunity for gentle, water-based removal that is safe for skin, hair, and nails
3Strength
If high concentration of acrylates/VA copolymer is used to improve film formation, then film strength is improved, but flexibility and removability deteriorate
Solution Approach 1:
The patent optimizes the concentration of acrylates/VA copolymer to a specific range (20-30% by weight of total composition) and combines it with acrylates copolymer (0.5-2.5% by weight), while also controlling the glass transition temperature and melting point parameters. This balanced formulation achieves sufficient film strength while maintaining flexibility and removability, avoiding the pitfalls of both under-formulation (weak film) and over-formulation (rigid, non-removable film)
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 easy removal with light scrubbing and water, maintains flexibility and adhesion, and enhances shine and active ingredient delivery, while resisting smudge and transfer.
Implementation Method 1
The spray-on film forming composition is designed to work with another topical preparation... The film forming composition is in direct contact with (that is, immediately 'adjacent to') the cosmetic or skincare product
Implementation Method 2
Long wear cosmetic products are designed to resist smudging and transfer... The compositions wear well, are smudge and flake resistant
Implementation Method 3
acrylates/VA copolymer (20 - 30% by weight of total composition) and acrylates copolymer (0.5 - 2.5% by weight of total composition) in an cosmetically acceptable aqueous base (40% to 65% of water by weight of total composition)
Data Source
AI summary
A spray-on film forming composition is designed to work with another topical preparation, such as a conventional cosmetic foundation or skincare product. The film forming composition is in direct contact with the cosmetic or skincare product. The spray-on film forming composition may be applied underneath a topical preparation (as a primer), on top of a topical preparation (as a mask), or both, depending on the benefit conferred. The spray-on film forming compositions of the invention are able to improve wearability and removability, increase shine, and deliver active ingredients. They are very clear, flexible and comfortable.