Hydrophobic Polymer Mineral Sunscreen Transparency Water Resistance
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Solution Overview
Problem
Existing mineral sunscreen compositions often exhibit a white appearance on the skin, which consumers find unappealing, and they lack water resistance, requiring frequent reapplication, especially when engaging in water activities.
Innovation Solution
The development of mineral sunscreen compositions that incorporate a hydrophobic polymer formed from a reaction product of a natural or food-derived oil and a methacrylate or acrylate polymer, which improves transparency, water resistance, and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high amounts of mineral UV filtering agents are used to increase UV protection, then the degree of UV protection is improved, but the white appearance on skin is worsened
Solution Approach 1:
The patent changes the physical and chemical parameters of the sunscreen composition by incorporating a hydrophobic polymer matrix that modifies how mineral UV filters interact with skin. This polymer matrix allows for better dispersion and reduced light scattering, enabling high UV protection with minimal whitening effect.
Solution Approach 2:
The invention creates a composite material system combining hydrophobic polymer, natural oil reaction product, and mineral UV filtering agents. This composite structure provides enhanced UV protection while the polymer matrix controls the optical properties to reduce white appearance on skin.
2Reliability
If mineral sunscreen compositions are made water-resistant, then durability is improved, but transparency is worsened
Solution Approach 1:
The patent modifies the hydrophilic-lipophilic balance of the formulation by using a hydrophobic polymer and natural oil reaction product, creating water resistance while maintaining transparency through optimized composition parameters and phase distribution.
3Illumination intensity
If transparency of mineral sunscreen composition is improved, then aesthetic appeal is improved, but water resistance is worsened
Solution Approach 1:
The invention develops a composite formulation where hydrophobic polymer and natural oil reaction product work synergistically to provide both transparency and water resistance, overcoming the traditional trade-off between these properties.
4Duration of action of moving object
If mineral sunscreen composition is made long-lasting and water-resistant, then duration of action is improved, but whitening effect is worsened
Solution Approach 1:
The patent optimizes the composition parameters including polymer concentration, oil-to-polymer ratio, and UV filter distribution to achieve long-lasting water-resistant protection while minimizing whitening through improved optical properties.
Solution Approach 2:
The composite material system with hydrophobic polymer and natural oil reaction product provides durable protection that persists through water exposure while maintaining aesthetic appeal by reducing white appearance.
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 use of this hydrophobic polymer in mineral sunscreen compositions results in products that are long-lasting, resistant to washing, minimize whitening, and provide exceptional protection against UV rays, enhancing consumer satisfaction.
Implementation Method 1
a hydrophobic polymer formed as a reaction product of a natural or food-derived oil and a methacrylate or acrylate polymer
Data Source
AI summary
Mineral sunscreen compositions are described, having (a) a hydrophobic polymer formed as a reaction product of a natural or food-derived oil and a methacrylate or acrylate polymer; (b) one or more solvents capable of solubilizing the hydrophobic polymer; (c) one or more mineral UV filtering agents; (d) one or more surfactants; and (e) water; wherein the composition is an oil-in-water emulsion. Methods from making and using the mineral sunscreen compositions are also described.