Silicone-Free Sunscreen Composition for Clear, Compatible UV Protection
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Solution Overview
Problem
Existing translucent sunscreen formulations that disperse organic UV filter substances into silicone elastomer blends face compatibility issues, leading to high costs and reduced UV protection, especially when high use levels of silicone elastomer are required.
Innovation Solution
A sunscreen preparation comprising organic UV filter substances and specific components like Triheptanoin, Coco-Caprylate/Caprate, Dilinoleic Acid/Butanediol Copolymer, and Castor Oil/IPDI Copolymer, which are used without silicone elastomer, to achieve high SPF without compromising clarity and sensory feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If high use level of silicone elastomer is used to achieve translucent appearance and silky skin feel, then the sunscreen provides good cosmetic appearance and skin feel, but the cost increases and UV protection is reduced due to compatibility issues
Solution Approach 1:
The patent removes silicone elastomer from the formulation entirely, replacing it with alternative ingredients that do not compromise UV protection. The invention extracts the problematic component (silicone elastomer) that caused compatibility issues while maintaining the desired cosmetic properties through other ingredients.
Solution Approach 2:
The patent changes the chemical composition parameters by substituting silicone elastomer with specific alternative ingredients (such as cyclopentasiloxane in controlled amounts, combined with other compatible substances). This parameter change resolves the compatibility issue between UV filters and the base formulation while maintaining cosmetic appearance.
2Ease of manufacture
If high use level of silicone elastomer is used to achieve translucent appearance, then the sunscreen provides good cosmetic appearance, but the overall cost of the formula increases
Solution Approach 1:
The patent replaces expensive silicone elastomer with more cost-effective alternative ingredients. The invention uses cheaper substances that can achieve similar or better cosmetic performance without the high cost associated with silicone elastomer, thereby reducing the overall formula cost.
Solution Approach 2:
The patent changes the ingredient selection parameters to use alternative substances that are less expensive than silicone elastomer. By adjusting the composition to exclude or minimize silicone elastomer and incorporate other affordable ingredients, the formula maintains translucent appearance at lower cost.
3Ease of manufacture
If silicone elastomer is used to disperse organic UV filter substances, then the formulation achieves translucent appearance, but compatibility issues prevent high UV protection
Solution Approach 1:
The patent removes silicone elastomer from the formulation, eliminating the source of compatibility problems. By extracting this problematic ingredient, the invention resolves the instability issue between silicone elastomer and organic UV filter substances while maintaining the translucent appearance through alternative ingredients.
Solution Approach 2:
The patent introduces intermediary substances that act as compatible bridges between UV filter substances and the base formulation. These intermediary ingredients facilitate stable compatibility without requiring silicone elastomer, resolving the compatibility issue while maintaining formulation integrity.
Data Source
AI summary
A sunscreen preparation for topical application to skin comprises one or more organic UV filter substances as well as Triheptanoin, Coco-Caprylate/Caprate, Dilinoleic Acid/Butanediol Copolymer, Castor Oil/IPDI Copolymer, Poly C10-30 Alkyl Acrylate, Hydroxystearic Acid, and Dextrin Palmitate.