Polyol Polyesters for High Refractive Index Personal Care
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Solution Overview
Problem
Conventional personal care products struggle to achieve desired levels of shine, gloss, and clarity due to the relatively low refractive indices of ester oils, which are necessary for these properties but also contribute to undesirable attributes like oiliness and greasiness.
Innovation Solution
Incorporating liquid, light viscosity, non-irritating, non-penetrating polyol polyesters with high refractive indices into personal care compositions, specifically those derived from reacting aliphatic polyols with two to three carbon atoms and benzoic acid, to enhance shine, gloss, and clarity while maintaining aesthetic benefits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If ester oils are incorporated into personal care products to improve softness and smoothness, then skin softness and hair conditioning are enhanced, but shine and gloss are reduced due to low refractive indices
Solution Approach 1:
The patent combines ester oils with polyols having high refractive indices (greater than 1.5) to create a composite personal care composition. This composite approach allows the formulation to simultaneously achieve skin softness from the ester oils and enhanced shine/gloss from the high refractive index polyols, resolving the contradiction between these two desirable properties.
Solution Approach 2:
The patent changes the refractive index parameter of the composition by incorporating polyols with specifically selected high refractive indices. This parameter change directly addresses the limitation of conventional ester oils by increasing the overall refractive index of the formulation, thereby improving shine and gloss while maintaining the softness benefits.
2Reliability
If conventional ester oils are used to provide substantiveness and conditioning effects, then adhesion to substrate is improved, but oiliness and greasiness increase
Solution Approach 1:
The patent modifies the physical parameters of the composition by incorporating polyols with high refractive indices and light viscosity. These parameter changes allow the formulation to maintain substantiveness while reducing the oiliness and greasiness associated with conventional ester oils, as the high refractive index polyols provide a different sensory profile.
3Illumination intensity
If high refractive index materials are incorporated to improve shine and gloss, then reflectivity is enhanced, but formulation complexity increases
Solution Approach 1:
The patent employs polyols that serve multiple functions: they provide high refractive index for shine and gloss, contribute to skin softness and hair conditioning, and offer light viscosity for easy application. This multi-functionality reduces formulation complexity by eliminating the need for separate ingredients to achieve each benefit.
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 use of polyol polyesters with refractive indices greater than 1.5 at 25°C improves the shine, gloss, and clarity of personal care products applied to skin, hair, or nails, providing enhanced aesthetic and comfort-related properties without the drawbacks of traditional ester oils.
Implementation Method 1
The Fresnel law of diffraction states that the intensity of a reflected beam of light emanating from air that is incident on a surface of a material is a function of: (1) the angle of incidence, (2) the polarization of the incident beam, and (3) the index of refraction of the material. Reflectivity ('R') is defined as the ratio of the intensity of the reflected beam ('Ir') to the intensity of the incident beam ('Ii'). By application of the Fresnel law, the equation relating R to the refractive index of the surface material ('n') is given by: R=Ir/Ii=(n−1)2/(n+1)2 Thus, the higher the refractive index of the layer of personal care product, the greater its reflectivity.
Data Source
AI summary
The invention includes personal care compositions and methods of preparing these personal care compositions that include incorporation of a polyol polyester that is the reaction product of an aliphatic polyol that does not contain an ether group, and benzoic acid, wherein the resultant polyol polyester has a refractive index at 25° C. of greater than about 1.5. The aliphatic polyol may have two to three carbon atoms. Alternatively, the invention includes personal care compositions and methods of preparing personal care compositions including incorporating a polyol polyester into a personal care formulation. The polyol polyester is represented by formula (I):wherein R is an aliphatic alkyl group that does not contain an ether group and has a refractive index of greater than about 1.5 at 25° C. Also described are methods of preparing personal care compositions comprising a first phase and a second phase, wherein the second phase contains any of the polyol polyesters described above.