Fluid Branched Polymers for Non-Transferable Cosmetics
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Solution Overview
Problem
Conventional cosmetic compositions fail to provide extended application times, prevent filming, and ensure non-transferability while maintaining a comfortable, elastic texture, as they often dry out and become rigid, lacking the unique rheologic properties of natural lubricating fluids.
Innovation Solution
Incorporating fluid branched polymers synthesized from specific reactive components A, B, and C, with controlled molar ratios and reactive functional groups, which exhibit viscoelastic behavior and generate a Normal Force perpendicular to the application direction, thereby maintaining thickness and preventing transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional cosmetic compositions are used, then the product provides basic cosmetic coverage, but the application time is short and the product dries out and becomes rigid
Solution Approach 1:
The patent changes the rheological parameters of the cosmetic composition by incorporating viscoelastic fluids that generate normal forces, transforming the flow behavior from conventional shear-thinning to one that maintains thickness and elasticity during application, thereby extending application time while preserving texture comfort
Solution Approach 2:
The patent creates a composite cosmetic formulation by combining viscoelastic fluids with film-forming agents and cosmetic pigments, where the viscoelastic component provides extended application time and elastic texture while the film-forming agents provide durability without rigidity
2Reliability
If film-forming agents are used to achieve long-lasting and non-transferable effects, then wear resistance is improved, but the product dries out and loses elasticity
Solution Approach 1:
The patent modifies the physical-chemical parameters of the film-forming system by using viscoelastic fluids that maintain water and oil balance, preventing the composition from drying out while still forming a durable, non-transferable film that retains elasticity throughout wear
Solution Approach 2:
The viscoelastic fluid acts as an intermediary between the film-forming agents and the skin, providing a lubricating effect that prevents excessive drying while allowing the film to form and adhere, thus maintaining both wear resistance and elasticity
3Force
If the formulation is applied between surfaces in relative motion, then a Normal Force is generated perpendicular to the flow direction, but the viscosity must be carefully controlled to maintain thickness
Solution Approach 1:
The patent precisely controls the viscosity and molecular weight parameters of the viscoelastic polymers to optimize the normal force generation while maintaining appropriate application thickness, requiring careful selection of polymer chain length and crosslinking density
Solution Approach 2:
The patent employs dynamic rheological properties of viscoelastic fluids that adapt their viscosity under shear stress, allowing the formulation to maintain thickness at rest while flowing smoothly during application and generating normal force perpendicular to the flow direction
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 use of these polymers extends application time, prevents drying and rigidity, and achieves long-lasting, non-transferable cosmetic products with a comfortable, elastic film, enhancing sensory experience and wear resistance.
Implementation Method 1
mucus has the so-called Weissenberg effect according to which a fluid, when rotated by means of an impeller, climbs on the rod ('rod climbing' effect) of the impeller itself
Implementation Method 2
non-solid cosmetic compositions with the rheologic characteristics of viscoelastic fluids
Implementation Method 3
the viscosity thereof decreases ('shear thinning'): therefore, they are materials that, while they are spread, reduce the viscosity thereof in a direction parallel to the flow
Data Source
AI summary
A fluid cosmetic composition with unusual rheologic characteristics has a formulation comprising 0.1 to 50% by weight of at least one fluid branched polymer obtained by simultaneous reaction from components A. B and C, where A is a linear polymer with a molecular weight Mw between 5000 and 50000 Da, provided with reactive functional groups X in a chain at a concentration between 0.1 and 50 mmol/g of polymer. B is a linear polymer with a molecular weight Mw between 10000 and 100000 Da, having terminal reactive functional groups of type Y capable of reacting with the functional group X in an addition or condensation reaction, and C is a molecule or linear oligomer (or a mixture thereof) with a molecular weight between 50 and 1000 Da, having a reactive functional group Y per molecule, capable of reacting with the functional group X in an addition or condensation reaction. The molar ratio of the functional groups of B and A is between 0.01 and 0.5 and the molar ratio of the functional groups of C and A is between 0.5 and 1.2. The reactive group X of A is capable of reacting with the reactive sites Y of B and C.