Amphiphilic Co-polymer Conjugates for Controlled Fragrance Release
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Solution Overview
Problem
The perfume industry faces challenges in prolonging the effect of volatile or poorly substantive perfuming ingredients, with existing polymer-based solutions offering modest performance in releasing active molecules effectively.
Innovation Solution
Development of amphiphilic co-polymer conjugates based on a polyethylene or polypropylene backbone with β-oxy or β-thio carbonyl moieties, capable of releasing odoriferous molecules like α,β-unsaturated ketones, aldehydes, or carboxylic esters, through controlled decomposition reactions, enhancing perfume release and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If existing polymer-based solutions (styrene co-polymers) are used to prolong the effect of perfuming ingredients, then the duration of action is extended, but the release performance of active molecules remains modest
Solution Approach 1:
The patent modifies the chemical structure of polymer-based pro-fragrances by incorporating specific β-oxy carbonyl or β-thio carbonyl moieties into the polymer backbone. This structural parameter change enables controlled decomposition reactions that selectively release odoriferous molecules, transforming the modest release performance into superior controlled release while maintaining prolonged duration of action.
Solution Approach 2:
The invention creates composite polymer structures combining hydrophobic segments (for substantivity and prolonged effect) with hydrophilic β-oxy or β-thio carbonyl moieties (for controlled release). This composite approach integrates the advantages of both hydrophobic and hydrophilic characteristics, achieving both extended duration and improved release performance simultaneously.
2Illumination intensity
If volatile perfuming ingredients are used to provide immediate fragrance, then the intensity is high, but the substantivity and duration are poor
Solution Approach 1:
The patent incorporates odoriferous molecules into the polymer structure during the polymerization process, creating a pre-assembled pro-fragrance system. The odoriferous molecules are trapped within the polymer matrix in advance, allowing them to be released gradually over time. This preliminary incorporation ensures both immediate fragrance intensity upon application and prolonged substantivity through controlled decomposition and release mechanisms.
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 co-polymer conjugates provide superior performance in releasing odoriferous molecules, offering improved substantivity and prolonged fragrance retention on surfaces such as textiles and hair, outperforming previous polymer-based solutions.
Implementation Method 1
capable of liberating an active molecule such as, for example, an α,β-unsaturated ketone, aldehyde or carboxylic ester through controlled decomposition reactions
Implementation Method 2
improved substantivity and prolonged fragrance retention on surfaces such as textiles and hair
Data Source
AI summary
The present invention relates to the field of perfumery. More particularly, it concerns polyethylene or polypropylene based polymers that have at least one β-oxy or β-thio carbonyl moiety capable of liberating a perfuming molecule such as, for example, an α,β-unsaturated ketone, aldehyde or carboxylic ester. The present invention concerns also the use of such compounds in perfumery as well as the perfuming compositions or perfumed articles that include such compounds.