Oil-in-Water Emulsion Stability via Batyl Alcohol Mediator
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Solution Overview
Problem
Existing oil-in-water emulsion cosmetics face challenges in achieving stable emulsion stability and a moist feel due to the difficulty in blending ultraviolet-protective agents, which often result in dryness and poor washability.
Innovation Solution
The composition includes a (meth)acrylic acid/alkyl (meth)acrylate/(meth)acrylic acid-POE monoalkyl ether ester copolymer, batyl alcohol, and 10% or more of a polar oil, along with a higher alcohol and an alkyl-modified carboxyvinyl polymer, to enhance emulsion stability and provide a moist feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a polymer is blended as an emulsifier in an oil-in-water emulsion cosmetic, then the emulsion can be formed, but an ultraviolet-protective agent is difficult to blend stably
Solution Approach 1:
The patent introduces batyl alcohol as an intermediary substance that mediates between the polymer emulsifier and the ultraviolet-protective agent. Batyl alcohol forms an aggregate structure with the polymer and water, creating a stable environment that allows the ultraviolet-protective agent to be blended without precipitation or phase separation, thus resolving the compatibility issue between polymer emulsifiers and UV agents
Solution Approach 2:
The patent creates a composite emulsion system comprising multiple components: polymer emulsifier, batyl alcohol, water, and ultraviolet-protective agent. This composite formulation leverages the synergistic interactions between components to achieve both stable emulsion formation and successful UV agent blending, overcoming the limitations of single-component or simple binary systems
2Adaptability or versatility
If a higher alcohol is blended to form an aggregate with lamellar liquid-crystal structure, then ultraviolet-protective agent is stably blended, but emulsion stability and moist feel in use require further improvement
Solution Approach 1:
The patent optimizes the concentration and molecular structure parameters of batyl alcohol to enhance its ability to form stable aggregates with polymer and water. By adjusting these parameters, the aggregate structure provides both stable UV agent blending and improved emulsion stability, while the specific molecular characteristics contribute to a moist feel in use
3Reliability
If ultraviolet absorber is contained in large amount, then sunscreen effect is improved, but dryness occurs
Solution Approach 1:
Batyl alcohol acts as a mediating substance between the ultraviolet absorber and the skin. It forms a stable aggregate structure that allows high concentrations of ultraviolet absorber to be incorporated while the batyl alcohol component provides moisturizing properties, preventing the dryness that would otherwise result from high UV absorber content
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 results in an oil-in-water emulsion with improved stability and a moist, non-sticky feel, allowing for effective blending of ultraviolet absorbers while maintaining high emulsion stability and easy washability.
Implementation Method 1
a (meth)acrylic acid/alkyl (meth)acrylate/(meth)acrylic acid-POE monoalkyl ether ester copolymer
Implementation Method 2
The polar oil is preferably an ultraviolet absorber
Data Source
AI summary
An oil-in-water emulsion composition is to be excellent in emulsion stability even in polymer emulsification and to provide a further moist feel in use.An oil-in-water emulsion composition is made to include (A) a (meth)acrylic acid/alkyl (meth)acrylate/(meth)acrylic acid-POE monoalkyl ether ester copolymer, (B) batyl alcohol, and (C) 10 mass % or more of a polar oil with respect to the total amount of the composition.