Retinoid Cosmetic Compositions With Emollient-Based Stability

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Solution Overview

Problem

Retinoids in cosmetic compositions are unstable under various degradation conditions, including exposure to UV light, oxidation, and heat, leading to a loss of biological efficacy and increased development and consumer costs due to the complexity of stabilizing them.

Innovation Solution

Cosmetic compositions comprising emollients, occlusives, viscosity-decreasing agents, and humectants that stabilize retinoids, maintaining their concentration within 10% of the initial value for at least 6 months under heating conditions and high humidity, allowing for extended shelf life and reduced retinoid usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If retinoids are used in cosmetic compositions, then biological efficacy is improved, but stability under degradation conditions deteriorates

Engineering Contradiction:
Improvebiological efficacyVSAvoidretinoid stability
Core Design Contradiction:
ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent changes the chemical parameters of retinoids by using stable derivatives (retinyl palmitate, retinyl propionate, retinyl acetate, retinyl retinoate) instead of unstable retinols, thereby maintaining biological efficacy while improving stability under degradation conditions

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent creates composite formulations by combining retinoid derivatives with specific stabilizing ingredients including antioxidants (vitamin E, vitamin C), chelating agents (EDTA), and encapsulating materials to enhance overall formulation stability

Inventive Principle:
Principle #40Composite materials

2Stability of the object's composition

If retinoid derivatives are created to improve stability, then stability is improved, but formulation complexity increases

Engineering Contradiction:
Improveretinoid stabilityVSAvoidformulation complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent modifies the chemical structure parameter of retinoids by esterifying them with different fatty acids (palmitic, propionic, acetic, retinoic acid) to create derivatives with improved stability while maintaining the core retinoid functionality

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent uses readily available and inexpensive fatty acid derivatives that can be easily synthesized or obtained, avoiding the need for complex stable isotopes or expensive specialized compounds

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

3Stability of the object's composition

If new retinoid derivatives are developed, then stability may increase, but development and consumer costs increase

Engineering Contradiction:
Improveretinoid stabilityVSAvoiddevelopment cost
Core Design Contradiction:
Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The patent systematically varies the fatty acid chain length and saturation parameters in retinyl ester derivatives to optimize stability while using common, inexpensive starting materials that reduce development costs

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent develops a universal approach using multiple retinyl ester derivatives that can be interchanged based on specific formulation needs, reducing the need for separate development programs for each derivative

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250339360A1Cosmetic compositions comprising retinoids and moisturizers and methods for stablizing retinoids
Publication Date: 2025.11.06 ELC MANAGEMENT LLC

AI summary

Cosmetic compositions having retinoid stability may comprise about 70 wt % to about 85 wt % of at least one emollient, based on total mass, and up to about 0.3 wt % of at least one retinoid, based on total mass. Suitable emollients may include, for example, at least glyceryl triacetyl ricinoleate, bis-diglyceryl polyacyladipate-2, hydrogenated polyisobutene, synthetic beeswax, and diisostearyl malate. The at least one retinoid may comprise hydroxypinacolone retinoate.