Polyquaternium-16 Deodorant Polymers Stabilized by Emulsifiers
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Solution Overview
Problem
Existing cosmetic deodorants and antiperspirants face challenges with the stability and effectiveness of polyquaternium polymers, particularly polyquaternium-16 and polyquaternium-6, due to their high cationic charge density, leading to precipitation and agglomeration issues, and there is a lack of evidence that these polymers act as deodorant active ingredients.
Innovation Solution
The use of polyquaternium-16, polyquaternium-6, and polyquaternium-37 polymers as antimicrobial deodorant active ingredients in cosmetic preparations, stabilized with nonionic and cationic emulsifiers and rheology modifiers, which form stable micro- and macro-emulsions, allowing for effective deodorization without antiperspirant effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyquaternium polymers (PQ-6, PQ-16, PQ-37) are used as antimicrobial deodorant active ingredients, then deodorant effectiveness is improved, but formulation stability deteriorates due to precipitation and agglomeration caused by high cationic charge density
Solution Approach 1:
The patent introduces specific emulsifiers and stabilizers as intermediary substances to mediate between the polyquaternium polymers and the aqueous phase. These intermediaries prevent direct interaction between the high charge density polymers and water that causes precipitation, thereby maintaining both deodorant effectiveness and formulation stability simultaneously.
Solution Approach 2:
The patent modifies critical formulation parameters including pH control (maintaining acidic pH to suppress polymer charge), ionic strength adjustment, and concentration optimization of polyquaternium polymers. By changing these parameters, the patent resolves the contradiction between maintaining polymer antimicrobial activity and preventing precipitation/agglomeration.
2Reliability
If high concentration of polyquaternium polymers is used to enhance antimicrobial effectiveness, then deodorant activity is improved, but formulation stability and homogeneity worsen due to precipitation and phase separation
Solution Approach 1:
The patent optimizes the concentration of polyquaternium polymers within specific ranges and adjusts formulation parameters such as pH and ionic strength to prevent precipitation. This allows achieving sufficient antimicrobial effectiveness while maintaining formulation homogeneity and preventing phase separation.
Solution Approach 2:
The patent creates composite formulations combining polyquaternium polymers with specific emulsifiers, stabilizers, and other cosmetic ingredients. These composite systems work synergistically to maintain polymer solubility and prevent aggregation, enabling high concentrations without sacrificing formulation stability.
3Duration of action of moving object
If polyquaternium polymers are applied to textiles for deodorization, then deodorant effect is improved and duration is extended, but ease of operation and wash-off properties worsen
Solution Approach 1:
The patent creates localized adhesion of polyquaternium polymers to textile fibers through electrostatic interactions and hydrogen bonding. The polymers bind strongly to negatively charged textile surfaces for prolonged deodorant effect, while the formulation includes agents that facilitate controlled removal during washing by disrupting these local interactions.
Solution Approach 2:
The patent formulates polyquaternium polymers with dynamic binding characteristics - strong adhesion under normal conditions for extended deodorant protection, but reversible binding that allows easy removal during washing. The formulation balances permanent and temporary binding mechanisms to achieve both long duration and ease of wash-off.
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 polymers demonstrate significant antimicrobial effectiveness against Staphylococcus epidermidis and Corynebacterium jeikeium, providing a deodorant effect that lasts for 24-48 hours, even when applied to textiles, and show improved stability and wash-off properties.
Implementation Method 1
As quaternary ammonium compounds, polyquaternium polymers have quaternary nitrogen atoms, i.e. all four hydrogen atoms of the ammonium ion are replaced by organic residues. The compounds are therefore cationic, i.e. have a positive charge.
Implementation Method 2
stabilized with nonionic and cationic emulsifiers and rheology modifiers, which form stable micro- and macro-emulsions
Data Source
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AI summary
The invention relates to the use of polyquaternium polymers, in particular polyquaternium-16 polymers, as active deodorant substances. Also disclosed is a cosmetic or dermatological preparation comprising polyquaternium polymers, in particular specific polyquaternium-16 polymers, in combination with non-ionic and/or cationic emulsifiers or rheology modifiers. The preparations are thus stable during production, use and storage.