Oral Foam Composition Viscosity Control Low Temperature
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Solution Overview
Problem
Existing liquid compositions for oral cavities in foam-discharging containers face issues with viscosity increase at low temperatures, leading to poor dischargeability and storage stability, especially when surfactants and ethanol are present, which can cause clogging and foam retention problems.
Innovation Solution
A liquid composition with specific ratios of anionic and amphoteric surfactants, polyols, water, and limited ethanol content, combined with restricted amounts of abrasive powder, binder, and nonionic surfactant, to maintain proper viscosity and foam quality, ensuring effective dischargeability and storage stability even at low temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anionic surfactant and ethanol are used in liquid composition for oral cavity, then foam quality and usability are improved, but viscosity increases at low temperature causing poor dischargeability and storage stability
Solution Approach 1:
The patent applies parameter changes by precisely controlling the ethanol content (0.1-5 mass%) and anionic surfactant content (0.1-5 mass%) within specific ranges, while adjusting polyol content (5-30 mass%) to compensate. This parameter optimization resolves the contradiction by finding the optimal balance point where foam quality is maintained while viscosity increase at low temperatures is suppressed, ensuring both storage stability and dischargeability.
Solution Approach 2:
The patent uses composite materials by combining multiple surfactant types (anionic surfactant, nonionic surfactant, and amphoteric surfactant) with polyols (glycerin, propylene glycol, butylene glycol) in specific ratios. This composite approach allows the formulation to achieve both good foam quality from the surfactant mixture and low-temperature viscosity control from the polyol blend, resolving the contradiction between storage stability and dischargeability.
2Reliability
If surfactant content is increased to improve foam quality, then foam retention in oral cavity is enhanced, but viscosity increases causing clogging in porous member
Solution Approach 1:
The patent applies parameter changes by controlling the total surfactant content (0.3-10 mass%) and specifically limiting individual surfactant types (anionic: 0.1-5 mass%, nonionic: 0.1-5 mass%, amphoteric: 0.1-5 mass%). This precise parameter control ensures sufficient foam retention while preventing excessive viscosity that would cause clogging in the porous member of the foam-discharging container.
Solution Approach 2:
The patent uses composite materials by formulating a mixed surfactant system with anionic, nonionic, and amphoteric surfactants in balanced proportions, combined with polyols. This composite surfactant system provides synergistic foam stabilization while the polyol components help maintain appropriate viscosity levels, preventing clogging while ensuring good foam retention in the oral cavity.
3Reliability
If nonionic surfactant is used to improve foam stability, then foam quality is enhanced, but viscosity rapidly increases at low temperature deteriorating dischargeability
Solution Approach 1:
The patent applies parameter changes by limiting the nonionic surfactant content to 0.1-5 mass% and balancing it with polyol content (5-30 mass%). This parameter control prevents the rapid viscosity increase at low temperatures that would otherwise occur with higher nonionic surfactant concentrations, while still maintaining adequate foam quality through the optimized surfactant-polyol balance.
Solution Approach 2:
The patent uses composite materials by combining nonionic surfactant with other surfactant types (anionic and amphoteric) and polyols in specific ratios. This composite formulation provides the foam stability benefits of nonionic surfactant while the other components, particularly polyols, counteract the viscosity increase at low temperatures, maintaining good dischargeability.
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 good foam quality, retention, and dischargeability in the presence of saliva, while maintaining high storage stability and preventing viscosity increases, thus enhancing the oral cavity environment and bactericide adsorption.
Implementation Method 1
Various surfactants are used in such a composition in order to achieve desired performances
Implementation Method 2
a liquid composition for oral cavity is filled in a container which enables discharging the content in the form of foam
Implementation Method 3
10 mass% or more and 40 mass% or less in total of one or more polyols selected from the group consisting of glycerin, propylene glycol, butylene glycol, and polyethylene glycol having an average molecular weight of 1,000 or less
Data Source
AI summary
The present invention relates to a liquid composition for oral cavity contained in a foam-discharging container, which enables effective suppression of an increase in viscosity at a low temperature and has high storage stability, while retaining good foam quality. The present invention provides a liquid composition for oral cavity contained in a foam-discharging container, comprising the following components (A), (B) and (C): (A) 0.3 mass% or more and 2.5 mass% or less in total of one or more surfactants selected from the group consisting of an anionic surfactant (a-1) selected from the group consisting of an N-acylamino acid salt, an alkyl sulfate ester salt, an alkyl phosphate salt and an α-olefin sulfonate salt, and an amphoteric surfactant (a-2) ; (B) 10 mass% or more and 40 mass% or less in total of one or more polyols selected from the group consisting of glycerin, propylene glycol, butylene glycol, and polyethylene glycol having an average molecular weight of 1,000 or less; and (C) 50 mass% or more and 89 mass% or less of water; wherein a content of the component (a-1) is 1.2 mass% or less, or the component (a-1) is not comprised, and a content of the component (a-2) is 0.25 mass% or more and 1.5 mass% or less, and furthermore, contents of ethanol, an abrasive powder, a binder and a nonionic surfactant, and a sugar alcohol which is a solid at 20°C are restricted in specified ranges.