UV Filter Composition for Broad-Spectrum Protection

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Solution Overview

Problem

Existing sunscreen compositions struggle to achieve high levels of UV protection while maintaining a pleasant texture and non-greasy feel.

Innovation Solution

The development of compositions that incorporate bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT) as a UV absorbing system, combined with additional UV filters and active agents, to provide enhanced UV protection properties such as a critical wavelength of at least 370 nm, a UVAPF/SPF ratio of at least 1/3, and a UVA1/UV ratio of 0.7 or higher.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If high levels of UV filters are used to achieve high protection, then UV filtering efficiency is improved, but composition stability and texture pleasantness deteriorate

Engineering Contradiction:

ImproveUV filtering efficiencyVSAvoidcomposition stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent changes the chemical parameters of the UV filter system by selecting specific filters with complementary absorption spectra and stable molecular structures. The formulation uses filters that maintain chemical stability across a range of concentrations, allowing high protection levels without compromising composition stability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a composite UV filter system combining multiple sunscreen filters work together synergistically. This composite approach distributes the filtering load across several stable compounds rather than relying on a single high-concentration filter, thereby maintaining both high UV protection and composition stability.

Inventive Principle:

Principle #40Composite materials

2Reliability

If high levels of UV filters are used to achieve high protection, then UV filtering efficiency is improved, but application texture (non-greasy feel) deteriorates

Engineering Contradiction:

ImproveUV filtering efficiencyVSAvoidapplication texture

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent adjusts the physical parameters of the formulation by controlling the concentration, particle size distribution, and crystalline structure of the UV filters. These parameter changes allow the filters to provide high UV protection while maintaining a fine, non-greasy texture that is pleasant during application.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies different types and concentrations of UV filters to different phases or layers of the composition. This local quality approach ensures that UV protection is maximized where needed while other regions maintain optimal texture and spreadability characteristics.

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

These compositions effectively provide broad-spectrum UV protection with a pleasant application feel, addressing the challenges of achieving high filtering efficiency while maintaining a non-greasy texture.

Implementation Method 1

a UV absorbing system comprising 2,4-bis-{[4-(2-ethyl hexyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine (INCI name: bis-ethylhexyloxyphenol methoxyphenyl triazine)

Methodology Applied

Scientific EffectUV absorption: Absorption (EM radiation)

Data Source

PatentUS20250195371A1Compositions containing active agent and UV protection properties

Publication Date: 2025.06.19 LOREAL SA

AI summary

The present disclosure relates to compositions including 2,4-bis-{[4-(2-ethyl hexyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine and at least one active agent, as well as to methods of making and using such compositions.