Topical Composition Reducing Surface Transfer via Micronized UV Filters

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Solution Overview

Problem

Current sun care products face challenges in providing high SPF and UVA protection while being photostable, require skin-friendly preservatives, and often cause unwanted transfer of fats and oils to surfaces like touch screens, leading to smearing issues.

Innovation Solution

Topical compositions comprising panthenol, hydroxyacetophenone, and a micronized UV filter, specifically methylene bis-benzotriazolyl tetramethylbutylphenol, which are combined with a C8-10 alkyl poly-glucoside to reduce transfer to glass or plastic surfaces, enhancing moisturization and skin friendliness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If sun care products contain significant amounts of fats and oils for moisturization and skin protection, then skin-friendly properties and moisturization are improved, but transfer to surfaces such as touch screens increases causing smearing

Engineering Contradiction:

Improvemoisturization and skin protectionVSAvoidtransfer to surfaces and smearing

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The patent changes the physical-chemical parameters of the formulation by incorporating specific ingredients (panthenol at 0.1-10% and hydroxyacetophenone at 0.01-5%) that modify the composition's transfer properties. These parameter changes allow the product to maintain moisturization benefits while reducing unwanted transfer to surfaces.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite formulation combining multiple functional ingredients: micronized UV filters for sun protection, panthenol for moisturization and skin soothing, hydroxyacetophenone as a preservative booster, and specific surfactants. This composite material approach achieves multiple functions simultaneously including reduced transfer while maintaining skin benefits.

Inventive Principle:

Principle #40Composite materials

2Reliability

If conventional preservatives are used to ensure product stability, then preservation effectiveness is improved, but skin friendliness and mildness deteriorate

Engineering Contradiction:

Improvepreservation effectivenessVSAvoidskin irritation and unfriendliness

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces conventional harsh preservatives with hydroxyacetophenone, which has different chemical properties that provide effective preservation while being gentler on the skin. This parameter change in the preservative system maintains product stability without causing skin irritation.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

Hydroxyacetophenone acts as an intermediary substance that bridges the need for effective preservation and skin friendliness. It provides preservative functionality while being mild enough for sensitive skin, mediating between the conflicting requirements of preservation strength and skin tolerance.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If high concentrations of UV filters are used to achieve high SPF and UVA protection, then sun protection capability is improved, but photostability and skin compatibility may deteriorate

Engineering Contradiction:

ImproveUVA and UVB protectionVSAvoidphotostability

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The patent uses a composite approach with multiple micronized UV filters working synergistically. The combination of different UV filter types (chemical and physical) in microparticulated form provides broad-spectrum protection while maintaining photostability through the distributed particle structure and complementary mechanisms of action.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent applies micronization technology to create locally optimized UV filter particles with specific size distributions. This local quality enhancement at the particle level improves UV filtering efficiency and photostability while allowing for lower overall concentrations, thereby maintaining skin compatibility.

Inventive Principle:

Principle #3Local quality

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 compositions effectively reduce the transfer of sun care products to surfaces, providing improved moisturization and skin protection with enhanced UVA and UVB filtering capabilities while maintaining a smooth, non-smeary application.

Implementation Method 1

sun care products exhibiting high SPF's (Sun Protection Factor) and high UVA protection while being photostable

Methodology Applied

Scientific EffectUV absorption: Absorption (EM radiation)

Implementation Method 2

Panthenol improves hydration, reduces itching and inflammation of the skin

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Implementation Method 3

compositions comprising one or more UV filters, a mild preservative and a soothing agent which overcome the above outlined drawbacks

Methodology Applied

Scientific EffectSurfactant action: Surfactant

Data Source

PatentUS11534374B2Topical composition

Publication Date: 2022.12.27 DSM IP ASSETS BV

AI summary

The present invention relates to topical compositions comprising panthenol, hydroxyacetophenone and a micronized UV filter.