Quick-Break High Oil Load Sunscreen Emulsions
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Solution Overview
Problem
Sunscreen products with US FDA-approved organic sunscreen actives often feel greasy and heavy, requiring improved skin feel and maintaining physical stability across various temperatures.
Innovation Solution
The development of quick-break high oil load emulsions comprising organic active agents and a combination of polyacrylate and glucoside/alcohol emulsifiers, which form oil-in-water emulsions for enhanced skin sensation and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organic sunscreen actives are used in sunscreen products, then sun protection function is achieved, but the product feels greasy and heavy
Solution Approach 1:
The patent changes the physical and chemical parameters of the formulation by using high oil load emulsions with specific oil-to-water ratios, incorporating volatile oils that evaporate quickly, and adjusting emulsifier concentrations to transform the greasy feel into a lightweight, quick-drying texture while maintaining sun protection efficacy
Solution Approach 2:
The patent employs composite emulsion systems combining multiple emulsifiers (polyacrylate crosspolymer, PEG-100 stearate, cetearyl glucoside, cetearyl alcohol) with various oil phases and water-soluble ingredients to create a multifunctional formulation that simultaneously provides sun protection, quick-drying properties, and improved skin feel
2Ease of operation
If high oil load emulsions are formulated to improve skin feel, then skin sensation is enhanced, but physical stability at different temperatures deteriorates
Solution Approach 1:
The patent uses a composite emulsion system with multiple emulsifiers having different HLB values and functionalities. The combination of polyacrylate crosspolymer (film-forming), PEG-100 stearate (o/w emulsifier), cetearyl glucoside (nonionic emulsifier), and cetearyl alcohol (emollient) creates a synergistic effect that stabilizes the emulsion structure across temperature variations while maintaining high oil load for improved skin feel
Solution Approach 2:
The patent applies different emulsifiers to different functional zones within the formulation: polyacrylate crosspolymer provides film-forming and structural stability, PEG-100 stearate handles the oil-water interface, cetearyl glucoside provides steric stabilization, and cetearyl alcohol contributes to creaminess and temperature stability, with each component optimized for its specific role
3Ease of operation
If quick break effect is achieved through volatile ingredients, then skin feel during drying time is improved, but formulation complexity increases
Solution Approach 1:
The patent incorporates volatile ingredients (isododecane, cyclopentasiloxane, ethanol) that change phase from liquid to gas rapidly upon application, creating a quick-evaporating effect that leaves behind a lightweight film. This parameter change (volatility) enables fast drying and non-greasy feel without requiring complex delivery systems or application mechanisms
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
These compositions provide improved initial and final skin feel, maintain physical stability across different temperatures, and exhibit a quick break effect, enhancing the overall user experience while ensuring product stability.
Implementation Method 1
the composition is an oil-in-water emulsion
Data Source
AI summary
Discloses are compositions which are suitable for use as sunscreen lotions and creams. The compositions are high oil load emulsions which exhibit both a quick-break effect, as well as physical stability at different temperature levels. Also disclosed are methods of manufacturing and using such compositions.