Nitrogen Borane Stabilized Skin Care Compositions

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Solution Overview

Problem

There is a need for effective, shelf-stable cosmetic compositions that address the visible signs of chronoaging and photoaging, such as wrinkles, lines, sagging, hyperpigmentation, and age spots, while also being suitable for sensitive, dry, or irritated skin, and these compositions should resist decomposition and yellowing during storage.

Innovation Solution

A water-in-oil emulsion cosmetic composition containing 0.01 to 10% conjugated fatty acids and 0.01 to 1% nitrogen-containing boranes, with a specific weight ratio, along with emulsifiers and other components, which provides stability and unique tactile sensory quality through the release of hydrogen gas, reducing oxidization and malodorous decomposition products.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If cosmetic compositions contain conjugated fatty acids for treating aging and sensitive skin, then skin care benefits are improved, but the compositions suffer from decomposition and yellowing during storage

Engineering Contradiction:

Improveshelf storage stabilityVSAvoidmalodorous decomposition products

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

Nitrogen-containing boranes are introduced as an intermediary substance that reacts with conjugated fatty acids to form stable adducts. This intermediary compound prevents direct oxidation and decomposition of the fatty acids during storage, thereby eliminating malodorous decomposition products while preserving the skin care benefits of the conjugated fatty acids.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The nitrogen-containing boranes perform preliminary protective action by forming stable complexes with conjugated fatty acids before storage begins. This pre-protection mechanism prevents decomposition and yellowing during the storage period, ensuring the composition remains stable and effective throughout its shelf life.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If cosmetic compositions contain conjugated fatty acids for anti-aging benefits, then skin treatment effectiveness is improved, but the compositions exhibit yellowing under storage conditions

Engineering Contradiction:

Improveresistance to yellowingVSAvoidstorage period

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

Nitrogen-containing boranes act as a protective intermediary that forms stable adducts with conjugated fatty acids, preventing oxidation and yellowing reactions during the storage period. This intermediary compound extends the storage period while maintaining the composition's aesthetic and therapeutic properties.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If cosmetic compositions are formulated to treat multiple skin conditions, then versatility is improved, but composition complexity increases

Engineering Contradiction:

Improvemulti-condition treatment capabilityVSAvoidcomposition formulation complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The nitrogen-containing borane conjugated fatty acid adduct serves multiple functions simultaneously: it provides anti-aging benefits through conjugated fatty acids, ensures shelf stability through borane protection, and delivers hydrogen for skin hydration. This multi-functional approach treats multiple skin conditions (aging, sensitivity, dryness) while maintaining relatively simple composition formulation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 composition achieves excellent shelf storage stability, reduces malodorous decomposition products, and provides a unique tactile sensory quality, effectively treating and preventing aging and sensitive skin issues while maintaining product freshness.

Implementation Method 1

nitrogen containing borane(s) added to the water phase of skin care product will hydrolyze to release hydrogen gas in-situ

Methodology Applied

Scientific EffectHydrolysis: Hydrolysis

Implementation Method 2

The hydrogen gas will help purge dissolved oxygen in the product to reduce the potential for oxidization

Methodology Applied

Scientific EffectGas purging:

Implementation Method 3

resist yellowing under the storage conditions described below

Methodology Applied

Scientific EffectOxidation resistance: Oxidation

Data Source

PatentEP3160423B1Nitrogen containing borane stabilized skin care compositions

Publication Date: 2017.12.20 UNILEVER PLC

AI summary

Cosmetic compositions containing conjugated fatty acid(s) and nitrogen containing borane(s) with improved stability are described. The compositions are water in oil emulsions that are effective in treating the skin to reduce the effects of aging and photo damage after being topically applied.