Retinoid Skin Care Compositions Using Aldehydes to Reduce Malodor
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Solution Overview
Problem
Formulating stable skin care products containing retinoids is challenging due to their susceptibility to degradation from oxidation, light exposure, heat, and interaction with other ingredients, leading to malodor and reduced efficacy, and existing preservative systems often include formaldehyde-releasing agents.
Innovation Solution
A skin care composition incorporating specific aldehydes and a preservative system free from formaldehyde-releasing agents, comprising phenoxyethanol, hydroxyacetophenone, carnosine, and sodium sulfite, along with a dermatologically acceptable carrier, to reduce malodor and maintain stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If retinoids are used in skin care products to provide skin health benefits, then skin appearance improvement is achieved, but the product develops malodor and yellowing over time due to retinoid degradation
Solution Approach 1:
The patent introduces aldehydes as intermediary substances that interact with retinoid degradation products to prevent malodor formation. These aldehydes act as mediators between the retinoid active ingredient and the final product characteristics, modifying the degradation pathway to eliminate harmful odors while preserving retinoid efficacy.
Solution Approach 2:
The patent converts the harmful degradation process of retinoids into a beneficial outcome by using the degradation products as substrates for aldehyde reactions. The malodor-causing degradation is transformed into a useful process that generates pleasant aromatic compounds, turning a defect into a feature.
2Stability of the object's composition
If preservatives and stability-enhancing ingredients are added to retinoid products, then retinoid stability is improved, but these ingredients themselves develop malodor over time
Solution Approach 1:
The patent merges the functions of multiple ingredients into a unified system where preservatives, stability enhancers, and malodor-control agents work together synergistically. The aldehydes are integrated with the preservative system to create a combined approach that addresses both stability and odor control simultaneously, rather than treating them as separate problems.
3Duration of action of stationary object
If retinoid-containing products are formulated with extended shelf life (2+ years), then long-term skin health benefits are provided, but degradation and malodor become significant issues
Solution Approach 1:
The patent applies preliminary action by incorporating aldehydes at the formulation stage that proactively prevent malodor formation before it occurs. These aldehydes are pre-positioned in the product to intercept and neutralize degradation products as they form during storage, preventing the accumulation of harmful odors throughout the extended shelf life period.
Data Source
AI summary
A skin care composition having reduced malodor. The skin care composition includes a retinoid and an aldehyde in a dermatologically acceptable carrier. The aldehyde can be an unsaturated cyclic aldehyde with 11 carbon atoms and/or a mixture of linear aldehydes having a chain length from about 4 to about 20 carbon atoms, alternatively from about 8 to 11 carbon atoms.