Oleosome Suspension Sunscreen Formulation for High SPF with Lower Actives
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Solution Overview
Problem
Existing sunscreen compositions face challenges in achieving high sun protection factor (SPF) while minimizing the use of expensive sunscreen actives, which can cause irritation and affect sensory and aesthetic properties, particularly when applied to the facial area.
Innovation Solution
A method involving the preparation of a sunscreen formulation by buffering an oleosome suspension at a pH of 3 to 6 using a weak acid or a combination of weak acid and strong base, and contacting it with sunscreen active ingredients to form a formulation with high SPF rates, even at modest concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high concentrations of sunscreen actives are incorporated to achieve high SPF, then sun protection factor is improved, but skin irritation and sensory property degradation worsen
Solution Approach 1:
The patent introduces an oleosome suspension as an intermediary carrier system that delivers sunscreen actives. The oleosomes act as a mediator between the sunscreen chemicals and the skin, enabling high SPF protection through enhanced delivery mechanisms rather than relying solely on high concentrations of actives, thus reducing direct skin contact with irritants
Solution Approach 2:
The patent modifies the physical state and delivery parameters of sunscreen actives by incorporating them into oleosome suspensions. This changes the formulation from simple chemical compounds to a complex emulsion system, altering how the actives interact with skin and enabling lower concentrations to achieve the same protection effect
2Reliability
If high concentrations of sunscreen actives are incorporated to achieve high SPF, then sun protection factor is improved, but manufacturing cost worsens
Solution Approach 1:
The oleosome suspension serves as an intermediary that enhances the efficiency of sunscreen actives. By using this carrier system, the patent achieves high SPF with lower concentrations of expensive actives, reducing material costs while maintaining protection levels
Solution Approach 2:
The patent changes the concentration parameters and delivery efficiency of sunscreen actives through oleosome incorporation. This allows the formulation to achieve high protection factors at lower active ingredient concentrations, directly reducing manufacturing costs
3Reliability
If high concentrations of sunscreen actives are incorporated to achieve high SPF, then sun protection factor is improved, but sensory and aesthetic properties worsen
Solution Approach 1:
The oleosome suspension acts as a mediator that improves the sensory profile of the sunscreen formulation. The natural oleosome structure provides a pleasant texture and appearance while delivering active ingredients, making the product more acceptable for facial use without requiring high concentrations of actives that would compromise sensory properties
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 method achieves high SPF rates, minimizes irritation, and maintains desirable sensory properties, allowing for the use of lower concentrations of sunscreen actives, thus reducing costs and regulatory concerns.
Implementation Method 1
preparation of a sunscreen formulation by buffering an oleosome suspension at a pH of 3 to 6 using a weak acid or a combination of weak acid and strong base
Data Source
AI summary
Methods for making an oleosome-based sunscreen formulation are provided. The methods involve preparing an oleosome suspension buffered at a pH in a range from about pH 3 to about pH 6, and contacting the oleosome formulation with a sunscreen active agent to prepare a sunscreen formulation. The sunscreen formulation may be used to prepare personal care products capable of protecting human skin against ultraviolet radiation. Related compositions are also provided.