Water-in-Oil Foundation with Absorbent Fillers for Sebum Control
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Solution Overview
Problem
Cosmetic make-up compositions, such as foundations, face challenges in maintaining wear and homogeneity, especially under extreme conditions like high sebum secretion, intense physical exercise, and varying temperatures and humidity, with existing long-lasting products often being uncomfortable or ineffective.
Innovation Solution
A cosmetic make-up composition in the form of a water-in-oil emulsion, comprising an aqueous polyurethane dispersion, hydrophobic film-forming polymer, volatile hydrocarbon oils, absorbent fillers with high oil uptake, and pigments, which provides improved wear and homogeneity by balancing comfort and resistance to sweat and sebum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If long-lasting polymers are used to improve wear, then the make-up durability is improved, but the comfort and effectiveness under extreme conditions deteriorates
Solution Approach 1:
The patent uses a composite polymer system combining a hydrophilic polymer (aqueous polyurethane dispersion) and a hydrophobic polymer (film-forming polymer). This composite approach allows the hydrophilic component to provide comfort and wear while the hydrophobic component ensures resistance to sweat and sebum under extreme conditions, resolving the contradiction between durability and reliability.
Solution Approach 2:
The patent assigns different functional properties to different components: the hydrophilic polymer provides comfort and general wear, while the hydrophobic polymer specifically targets resistance to sweat and sebum. This local differentiation of functions allows each component to optimize its performance for its designated purpose, resolving the contradiction.
2Quantity of substance
If absorbent fillers are used to improve mattness, then the oil absorption capacity is improved, but the potential for dehydration worsens
Solution Approach 1:
The patent carefully controls the amount of absorbent filler within a specific range (1-10%) and selects fillers with moderate absorption capacity. This parameter optimization ensures sufficient oil absorption for mattness while preventing excessive dehydration, resolving the contradiction between oil absorption capacity and dehydration risk.
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 ensures long-lasting, uniform coverage without the need for touch-ups, maintaining a satisfactory appearance and skin texture for extended periods, even under extreme conditions like hot and humid climates or intense physical activity.
Implementation Method 1
an aqueous polyurethane dispersion
Implementation Method 2
a hydrophobic film-forming polymer
Implementation Method 3
one or more volatile hydrocarbon oils
Implementation Method 4
one or more absorbent fillers having an oil uptake greater than or equal to 30 ml/100 g
Implementation Method 5
a cosmetic make-up composition for the skin in the form of a water-in-oil (W/O) emulsion
Data Source
AI summary
The present invention relates to a cosmetic make-up composition for the skin in the form of a water-in-oil (W/O) emulsion comprising in a physiological acceptable medium at least:a) an aqueous polyurethane dispersion,b) a hydrophobic film-forming polymer,c) one or more volatile hydrocarbon oils, preferably in an amount of at least 10 wt % relative to the total weight of the composition,d) one or more absorbent fillers having an oil uptake greater than or equal to 30 ml/100 g ande) pigments.