Soft Solid Emulsion for Deodorant Stability and Non-Greasy Feel
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current deodorant and antiperspirant products, particularly in the form of soft solids, face challenges in achieving stability during storage, ease of application, immediate dryness, non-wetting freshness, and avoiding tackiness and greasiness, while maintaining effectiveness.
Innovation Solution
A composition in the form of an oil-in-water emulsion with a continuous aqueous phase and an oily phase, containing a nonionic surfactant with a saturated linear hydrocarbon-based chain, a mixture of fatty alcohols with at least 16 carbon atoms, and candelilla or beeswax, along with a water-soluble polysaccharide, which provides a hardness of 20-200 kPa, ensuring a soft solid texture and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If soft solid compositions are formulated with anhydrous texture, then ease of application and soft feel are improved, but greasiness and lack of freshness increase
Solution Approach 1:
The invention combines multiple material components (waxes, oils, surfactants, polymers) in a composite emulsion system where each component contributes specific properties. The synergistic interaction between these materials creates a formulation that achieves both soft solid texture and non-greasy feel, resolving the contradiction between ease of application and greasiness.
Solution Approach 2:
The invention modifies physical parameters including hardness (20-200 kPa), viscosity, and emulsion droplet size to optimize performance. By controlling the hardness within this specific range and adjusting the emulsion structure, the formulation achieves soft solid characteristics that are easy to apply while evaporating quickly to avoid greasiness.
2Object-generated harmful factors
If roll-on formulations are used to provide fresh, fluid products, then freshness is improved, but tackiness and slow drying increase
Solution Approach 1:
The invention utilizes phase transition properties of the emulsion system, where the oil-in-water emulsion structure allows for controlled evaporation and phase separation that promotes rapid drying. The specific composition enables the product to transition from a applied state to a dried state quickly, eliminating tackiness while maintaining freshness.
3Ease of operation
If soft solid compositions are formulated for ease of application, then application properties are improved, but stability on storage (creamming, leaching) deteriorates
Solution Approach 1:
The invention incorporates stabilizing components that provide feedback mechanisms to maintain emulsion stability. The specific combination of surfactants and polymers creates a self-regulating system that prevents creaming and leaching during storage while maintaining the soft solid texture needed for easy application.
4Reliability
If deodorant and antiperspirant efficacy is maintained in soft solids, then effectiveness is improved, but formulation complexity and manufacturing difficulty increase
Solution Approach 1:
The invention designs a multi-functional formulation where a single emulsion system serves multiple purposes: providing soft solid texture, ensuring stability, enabling ease of application, and delivering deodorant/antiperspirant efficacy. This universal approach reduces the need for separate specialized components, simplifying manufacturing while maintaining effectiveness.
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 achieves stability on storage, a soft feel, immediate dryness, and non-wetting freshness, while maintaining efficacy as a deodorant or antiperspirant, addressing the limitations of existing products.
Implementation Method 1
at least one mixture consisting of: i) at least one nonionic surfactant containing a saturated linear hydrocarbon-based chain comprising at least 16 carbon atoms
Implementation Method 2
at least one wax selected between candelilla wax and/or beeswax, in an amount from 1 to 10% by weight relative to the total weight of the composition
Implementation Method 3
at least one water-soluble polysaccharide; the said composition having a hardness measured at 32°C and at a humidity of 40% ranging from 20 kPa to 200 kPa
Data Source
AI summary
The present invention relates to a composition in the form of an oil-in-water emulsion, comprising, in a cosmetically acceptable medium: A) a continuous aqueous phase and B) an oily phase dispersed in the said aqueous phase and comprising at least one hydrocarbon-based oil; C) at least one mixture consisting of: i) at least one nonionic surfactant containing a saturated linear hydrocarbon-based chain comprising at least 16 carbon atoms, the said surfactant being other than a fatty alcohol, and ii) at least one fatty alcohol chosen from: - a pure fatty alcohol comprising more than 16 carbon atoms; - a mixture consisting exclusively of fatty alcohols containing at least 16 carbon atoms and comprising at least 50% by weight of fatty alcohol containing at least 18 atoms relative to the weight of the fatty alcohol mixture; and D) at least one wax with a melting point of greater than 45°C comprising one or more C40-C70 ester compounds and not comprising any C20-C39 ester compounds, in an amount from 1 to 10% by weight relative to the total weight of the composition and E) at least one water-soluble polysaccharide; the said composition having a hardness measured at 32°C and at a humidity of 40% ranging from 20 kPa to 200 kPa and preferably ranging from 25 kPa to 150 kPa. The present invention also relates to a cosmetic process for treating and/or caring for human keratin materials, characterized in that it consists in applying to the surface of the keratin material a composition as defined previously. The present invention also relates to a cosmetic process for treating human perspiration and/or perspiration-related body odour, which consists in applying to the surface of a human keratin material a composition as defined previously comprising at least one deodorant active agent and/or one antiperspirant active agent.