12-Hydroxystearic Acid Skin Conditioning Composition
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Solution Overview
Problem
12-hydroxystearic acid (12HSA) is a solid with limited water and oil solubility, making it difficult to formulate non-solid skin conditioning compositions, which are desirable for cosmetic applications as they prevent solidification and ensure bioavailability.
Innovation Solution
A non-solid skin conditioning composition comprising 0.01-15% 12-hydroxystearic acid, an aminosilicone with a weight ratio of at least 2:1, and 1-99% water, with a particle having an isoelectric point below the composition's pH when water content exceeds 20%, maintaining 12HSA in a non-crystallized form to prevent solidification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 12-hydroxystearic acid is used in skin conditioning compositions, then skin conditioning benefits are achieved, but the composition solidifies and becomes unusable
Solution Approach 1:
The patent introduces water as an intermediary substance to prevent 12HSA crystallization. By incorporating 1-99% water into the composition, the 12HSA remains in a non-crystallized state, preventing solidification while maintaining skin conditioning benefits. The water acts as a mediator that keeps the active ingredient in a usable form.
Solution Approach 2:
The patent changes the physical state parameters of 12HSA by controlling its environment. By adjusting the composition to include specific amounts of water and other ingredients, the 12HSA transitions from a solid crystalline state to a non-crystallized state, enabling the composition to remain liquid or semi-liquid and usable.
2Reliability
If 12-hydroxystearic acid is incorporated into the composition, then cosmetic benefits are achieved, but the product solidifies on storage
Solution Approach 1:
Water serves as a stabilizing intermediary that prevents 12HSA from crystallizing during storage. The presence of water molecules interferes with the crystallization process, keeping 12HSA in a stable non-crystalline form throughout the product's shelf life.
Solution Approach 2:
The patent creates a composite composition system where 12HSA is combined with water and other ingredients in specific proportions. This composite structure prevents phase separation and crystallization, maintaining a stable homogeneous non-solid state during storage.
3Reliability
If 12-hydroxystearic acid is used, then skin lightening and sebum inhibition effects are achieved, but the composition becomes solid and non-bioavailable
Solution Approach 1:
By changing the physical state of 12HSA from solid crystalline to non-crystalline through the addition of water and other ingredients, the bioavailability of the active ingredient is significantly improved. The non-crystalline form allows for better penetration and absorption by the skin while maintaining the skin lightening and sebum inhibition effects.
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 composition remains non-solid and non-crystallized, ensuring stability and bioavailability, allowing for effective skin conditioning without solidification upon storage or application, thus maintaining its cosmetic benefits.
Implementation Method 1
12HSA is a solid and has no water solubility and limited oil solubility. Indeed, 12HSA has traditionally been used as gelling agent... non-solid skin conditioning compositions containing 12HSA are highly desirable... 12HSA remains in non-solid, non-crystallized form. Keeping 12HSA in non-crystallized form is crucial, to prevent solidifying of the product
Implementation Method 2
when the water amount is greater than 20% by weight of the composition the composition further comprises a particle having an isoelectric point below the pH of the composition
Data Source
AI summary
Non-solid skin conditioning compositions comprising 12-hydroxy stearic acid, aminosilicone and water are disclosed. The compositions have a relatively low viscosity and are suitable for spreading on the skin.