O/W Sunscreen with Acrylate Polymers for High SPF Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current sunscreen compositions often fail to provide high SPF without oxybenzone, while maintaining water resistance and aesthetic appeal, and may not be stable over time.
Innovation Solution
The development of an oil-in-water emulsion containing antioxidants, SPF boosters, acrylate-based polymers, organic UV filters, thickeners, film formers, and emulsifiers, which collectively enhance SPF and water resistance without oxybenzone, ensuring stability and a non-greasy, aesthetically pleasing application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high levels of UV filters are used to achieve high SPF, then sun protection is improved, but the formulation stability and aesthetic appeal deteriorate
Solution Approach 1:
The patent changes the concentration parameters of multiple components simultaneously - using 0.1-5% antioxidants, 0.5-7% SPF boosters, 10-40% UV filters, and specific amounts of polymers and emulsifiers. This multi-parameter optimization allows achieving SPF 80+ while maintaining formulation stability through balanced composition rather than simply increasing one component.
Solution Approach 2:
The patent creates a composite sunscreen formulation combining multiple functional components: UV filters (for protection), antioxidants (for stability), SPF boosters (for enhanced protection), polymers (for texture and stability), and emulsifiers (for formulation integrity). This composite approach distributes the protective function across multiple ingredients, preventing any single component from causing instability while achieving high SPF.
2Reliability
If high UV filter load is used to achieve high SPF, then sun protection is improved, but the composition becomes oily and greasy
Solution Approach 1:
The patent adjusts the physical-chemical parameters of the formulation by incorporating specific polymers (acrylates/C10-30 alkyl acrylate crosspolymer, polyacrylate-1 crosspolymer) and emulsifiers that modify the texture and spreadability. These parameter changes allow high UV filter content (10-40%) to be maintained while achieving a non-greasy, aesthetically pleasing application feel.
Solution Approach 2:
The patent introduces polymers and emulsifiers as intermediary substances that mediate between the UV filters and the skin. These intermediaries improve the aesthetic properties by controlling oiliness and greasiness, allowing high SPF to be achieved without compromising user comfort or appearance.
3Object-affected harmful factors
If oxybenzone is excluded from the formulation, then safety is improved, but achieving high SPF becomes more difficult
Solution Approach 1:
The patent segments the UV protection function across multiple different UV filter ingredients rather than relying on a single high-performance ingredient like oxybenzone. By using combinations of UV filters from different chemical classes (cinnamates, salicylates, benzophenones, triazines, etc.), the formulation achieves SPF 80+ while excluding oxybenzone, distributing the protective burden across several safer alternatives.
Solution Approach 2:
The patent merges multiple UV filter systems with complementary protection profiles - combining UVB filters (like octisalate, homosalate) with UVA filters (like avobenzone, zinc oxide). This merging of different filter systems creates synergistic effects that achieve high SPF without relying on any single ingredient, making oxybenzone unnecessary while maintaining or improving safety.
Data Source
AI summary
An oil-in-water composition is provided. The composition includes an oil-in-water wherein the emulsion includes a) one or more antioxidants, b) one or more SPF boosters, c) one or more acrylate-based polymer capable of stabilizing the composition, d) one or more organic UV filters, e) one or more thickeners, f) one or more film formers; and g) one or more emulsifiers. The oil-in-water composition is provided in which the composition is essentially free of oxybenzone.