Ammonia Odor Suppression in Keratin Fiber Compositions
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Solution Overview
Problem
Cosmetic compositions for keratin fibers that use ammonia as an alkaline agent often have an offensive odor, which is a significant drawback and has not been effectively addressed by existing technologies.
Innovation Solution
A composition for keratin fibers is developed by mixing non-neutralized anionic surfactants, non-ionic surfactants, and fatty alcohols to create an emulsion with a pH below 7.0, where ammonia is added, effectively reducing the ammonia odor through a trapping mechanism that immobilizes the alkaline agents within the emulsion structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ammonia is used as an alkaline agent in cosmetic compositions for keratin fibers, then the safety and performance during cosmetic treatments are improved, but an offensive odor is generated
Solution Approach 1:
The patent introduces phosphoric surfactants as intermediary substances that interact with ammonia to form ammonium phosphate complexes. These complexes act as mediators that retain the alkaline functionality of ammonia while preventing the release of free ammonia gas, thereby eliminating the offensive odor while maintaining treatment performance
Solution Approach 2:
The invention creates a composite system combining phosphoric surfactants with ammonia and other cosmetic ingredients. This composite approach allows the formulation to leverage the alkaline properties of ammonia for keratin treatment while the phosphoric surfactant component suppresses volatile ammonia release, resolving the contradiction between performance and odor
2Object-generated harmful factors
If phosphoric surfactants are added to suppress ammonia odor, then the odor is reduced, but the device complexity increases
Solution Approach 1:
The patent selects phosphoric surfactants that perform multiple functions simultaneously: they act as odor-suppressing agents by complexing with ammonia, serve as emulsifiers for the cosmetic formulation, and provide conditioning benefits for keratin fibers. This multi-functionality reduces the need for separate additives, thereby limiting the increase in composition complexity
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 significantly reduces the ammonia odor and improves stability, making it easier to mix and apply, while maintaining the performance of ammonia in hair coloring and permanent waving processes.
Implementation Method 1
mixing the oil phase obtained in step (i) with a water phase to prepare an emulsion
Implementation Method 2
mixing: (a) at least one non-neutralized anionic surfactant... (b) at least one non-ionic surfactant... (c) at least one fatty alcohol
Data Source
Figure 1(a)~1(b)
AI summary
The present invention relates to a composition for keratin fibers comprising: (a) at least one non-neutralized anionic surfactant; (b) at least one non-ionic surfactant; (c) at least one fatty alcohol; and (d) at least one alkaline agent, wherein the composition does not comprise more than 2% by weight of a phosphoric surfactant. The present invention can provide the composition for keratin fibers which can suppress its ammonium odor and have improved stability.