Isoalkane Mixture for Cosmetics via ISO Index Control
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Solution Overview
Problem
Existing cosmetic and pharmaceutical compositions face challenges with hydrocarbon mixtures that have high degrees of branching and intrinsic odors, leading to unsuitable properties for use as oil bodies, such as poor dermatological compatibility and strong terpene-like odors.
Innovation Solution
An isoalkane mixture with a specific chemical composition, characterized by a 1H NMR spectrum and absence of olefinic double bonds, tert-butyl groups, and uniform structure, is developed, which is produced through oligomerization of olefins followed by hydrogenation, resulting in improved dermatological compatibility and odorlessness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If highly branched isoparaffins are used as oil bodies in cosmetic compositions, then they can provide certain functional properties, but they exhibit strong terpene-like odors and poor dermatological compatibility
Solution Approach 1:
The patent changes the degree of branching parameter of the hydrocarbon molecules by specifying an ISO index between 0 and 1.5, which fundamentally alters the molecular structure from highly branched (ISO index >2) to slightly branched or linear (ISO index ≤1.5). This parameter change eliminates the harmful terpene-like odors and improves dermatological compatibility while maintaining the desired functional properties of the oil bodies.
2Ease of manufacture
If conventional hydrocarbon mixtures with high degrees of branching are used, then they can be obtained through standard oligomerization processes, but they produce strong intrinsic odors and unsuitable properties for cosmetic use
Solution Approach 1:
The patent modifies the oligomerization process parameters by controlling the ISO index to be between 0 and 1.5, which changes the product distribution to favor linear and slightly branched oligomers over highly branched ones. This parameter control in the manufacturing process eliminates the formation of terpene-like compounds while maintaining process feasibility.
Solution Approach 2:
The patent converts the typically harmful highly branched structures (which cause odors) into the desired product by selecting for the beneficial linear and slightly branched structures (low ISO index) during oligomerization. The process selectively produces the useful fraction while eliminating the harmful terpene-like components.
3Shape
If highly branched oligomers are produced from olefin oligomerization, then they can achieve certain structural properties, but they result in poor spreading behavior and unsuitable rheological properties for cosmetic applications
Solution Approach 1:
The patent changes the molecular shape parameter by controlling the degree of branching through the ISO index (0-1.5), which directly affects the rheological properties. The linear and slightly branched structures produce better spreading behavior and more suitable viscosity characteristics for cosmetic applications compared to highly branched structures.
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 isoalkane mixture provides enhanced skin and hair compatibility, improved rheological properties, and a pleasant feel, surpassing traditional oil bodies in terms of spreading behavior and stability, while being free from intrinsic odors.
Implementation Method 1
oligomerization of olefins in the presence of a nickel-containing catalyst
Implementation Method 2
the separated-off C16-fraction is hydrogenated
Data Source
AI summary
The present invention relates to an isoalkane mixture, to a method for its preparation and to cosmetic or pharmaceutical compositions which comprise such a mixture.