Cyclodextrin Fragrance Complexes with Hydrophobic Coating
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Solution Overview
Problem
Personal care products often suffer from a grainy or gritty feel due to agglomerated cyclodextrin particles, which can lead to undesirable texture and potential microbial growth, and existing technologies fail to effectively minimize fragrance perceptibility prior to release.
Innovation Solution
The use of cyclodextrin complexing material with a fragrance, where at least 90% of the fragrance is bound to the interior of cyclodextrin molecules, combined with low moisture levels and a hydrophobic coating to prevent premature release and agglomeration, resulting in a smooth texture and controlled fragrance release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cyclodextrin particles are used in personal care products, then fragrance complexing and controlled release are improved, but particle agglomeration occurs leading to grainy or gritty texture
Solution Approach 1:
The patent changes the physical parameters of cyclodextrin particles by controlling moisture content (reducing to less than 10% by weight) and particle size (less than 10 micrometers) to prevent agglomeration while maintaining complexing efficiency. This parameter optimization resolves the contradiction between fragrance binding and texture smoothness.
Solution Approach 2:
The patent introduces a hydrophobic coating material as an intermediary substance that coats the cyclodextrin particles. This coating acts as a protective layer that prevents particle agglomeration and maintains smooth texture while allowing the cyclodextrin to maintain its fragrance complexing function.
2Ease of manufacture
If cyclodextrin particles with higher moisture content are used, then processing is easier, but microbial growth risk increases and particles tend to agglomerate
Solution Approach 1:
The patent optimizes the moisture content parameter to less than 10% by weight, which is low enough to prevent microbial growth but achieved through controlled processing methods. This parameter change eliminates the harmful effects while maintaining manufacturability through proper formulation and processing techniques.
3Quantity of substance
If fragrance is not effectively bound to cyclodextrin interior, then fragrance perceptibility is high, but controlled release is compromised
Solution Approach 1:
The patent optimizes the complexing efficiency parameter by ensuring at least 90% of the fragrance is bound to the interior of cyclodextrin molecules. This high binding efficiency is achieved through proper cyclodextrin selection and formulation conditions, which simultaneously ensures controlled release performance.
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 solution minimizes fragrance perceptibility before release, reduces the risk of microbial growth, and prevents agglomeration, providing a smooth texture and controlled scent expression in personal care products.
Implementation Method 1
a cyclodextrin complexing material and a fragrance material complexed with the same, wherein the percent of the fragrance material that is complexed with the cyclodextrin is greater than about 90%
Implementation Method 2
the plurality of particles are coated with a hydrophobic coating material to minimize premature release due to the presence of the aqueous carrier material
Implementation Method 3
the plurality of particles are formed using a process comprising a step of spray drying
Data Source
AI summary
Personal care products are provided. An exemplary personal care product includes a composition that is applied to the body or clothing, or an article applied against the body; a plurality of particles associated with the composition or a component of the article, the plurality of particles, at least some of the plurality of particles comprising a cyclodextrin complexing material and a first fragrance material, wherein the percent of the first fragrance material that is complexed with the cyclodextrin is greater than about 90%, so that the perceptibility of the first fragrance is minimized prior to its release; and a second fragrance material that is not complexed with the cyclodextrin and that is different from the first fragrance material, wherein the composition or article does not contain an antiperspirant active.