High Refractive Index Organosiloxane for Non-Migrating Hair Shine
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Solution Overview
Problem
Current silicone compositions for personal care products lack high refractive indices, leading to inadequate hair shine and luster, and existing methods do not effectively provide non-migrating, high refractive index coatings for hair care applications.
Innovation Solution
Development of silicone compounds with a 1,1,1-triphenyl-3,3-dialkyl-3-alkenyldisiloxane structure, which exhibit high refractive indices and reduced migration, enhancing hair shine and luster, achieved through the reaction of triphenylsilanol with 1,1,3,3-tetraalkyl-1,3-dialkenyldisilazane and/or alkenyldialkylhalosilane, and subsequent processing to create a personal care composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional silicone compositions are used, then the product provides basic hair care benefits, but the refractive index is insufficient leading to inadequate hair shine and luster
Solution Approach 1:
The patent modifies the chemical structure of silicone compounds by incorporating phenyl groups and specific alkyl substituents at defined positions, which changes the refractive index parameter from conventional values to high refractive index values (>1.5), thereby improving hair shine and luster
Solution Approach 2:
The invention creates composite silicone structures combining triphenylsiloxy units with dialkyl-alkenyl-disiloxane moieties, integrating multiple functional groups (phenyl, alkyl, alkenyl) within a single molecular framework to achieve both high refractive index and non-migrating properties
2Illumination intensity
If higher refractive index materials are applied to hair, then apparent gloss and shine increase, but the material may migrate on the hair surface
Solution Approach 1:
The silicone compound is pre-formulated with optimal molecular weight, viscosity, and surface tension characteristics before application, enabling it to self-adhere to hair cuticles and form a stable coating that prevents subsequent migration during hair styling and environmental exposure
Solution Approach 2:
The patent designs the silicone molecule with specific local functional groups: phenyl groups for high refractive index and shine, alkyl groups for hydrophobicity and adhesion, and alkenyl groups for crosslinking capability, creating localized functional zones within the molecule that collectively prevent migration while maintaining gloss
3Ease of manufacture
If conventional silicone formulations are used, then the application process is simple, but the cosmetic benefits regarding shine and luster are insufficient
Solution Approach 1:
The triphenyl-alkenyl-disiloxane compound serves multiple functions simultaneously: it acts as a refractive index enhancer for shine, a hair coating agent for gloss, a potential crosslinker for film formation, and a hydrophobic component for moisture resistance, eliminating the need for multiple separate ingredients and maintaining formulation simplicity
Data Source
AI summary
The invention is directed to a silicone compound of the general formula (I) and a personal care composition comprising the silicone compound (I) as described herein, and to personal care applications containing the same and processes of making the silicone compound.