Transparent Solid Detergent Composition Stability
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Solution Overview
Problem
Conventional transparent solid detergents face issues with transparency, skin irritation, poor foaming in hard water, coloration during production, and instability at varying temperatures, particularly when using N-long chain acyl acidic amino acid salts.
Innovation Solution
A composition combining N-acyl acidic amino acid salt, acylglycine salt, and polyvalent alcohol at specific ratios, with the option to include a lower alcohol, to create a transparent solid detergent that maintains transparency and stability across temperature changes while suppressing coloration and enhancing foaming and usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If N-long chain acyl acidic amino acid salt is used as main agent, then transparency and mildness to skin are improved, but high temperature stability and foaming property deteriorate
Solution Approach 1:
The patent combines N-acyl acidic amino acid salt with N-acyl neutral amino acid salt to create a composite detergent system. This composite approach allows the acidic amino acid component to provide transparency and mildness while the neutral amino acid component contributes to thermal stability and foaming performance, resolving the trade-off between transparency and stability
Solution Approach 2:
The patent optimizes the molar ratio between N-acyl acidic amino acid salt and N-acyl neutral amino acid salt within specific ranges (acidic amino acid: 20-50 parts, neutral amino acid: 0.01-4.4 parts). By adjusting these compositional parameters, the formulation achieves both transparency from the acidic component and stability from the neutral component
2Illumination intensity
If N-long chain acyl acidic amino acid salt is combined with ethanolamine salt and alkali metal salt, then transparency is improved, but coloration occurs due to heating during production
Solution Approach 1:
The patent replaces traditional ethanolamine and alkali metal salts with N-acyl neutral amino acid salts, changing the chemical composition parameters. This substitution eliminates the coloration issue during heating while maintaining transparency through the amino acid salt system
Solution Approach 2:
The patent converts the potential harm of heating during production (which causes coloration with traditional ingredients) into a benefit by using thermally stable N-acyl amino acid salts that resist degradation, allowing effective heating for dissolution without adverse color changes
3Illumination intensity
If molar composition ratio of potassium salt, sodium salt and ethanolamine salt of N-long chain acyl acidic amino acid salt is adjusted, then transparency is improved, but the detergent becomes soft in high temperature and high humidity environment
Solution Approach 1:
The patent creates a composite system where N-acyl neutral amino acid salts serve as structural support components that maintain firmness in humid conditions, while N-acyl acidic amino acid salts provide transparency. The combination balances optical properties with mechanical stability
Solution Approach 2:
The patent assigns different functional roles to different components: the neutral amino acid salts specifically address structural stability and firmness in humid environments, while the acidic amino acid salts handle transparency and mildness, creating localized functional optimization within the formulation
4Illumination intensity
If N-long chain acyl acidic amino acid salt is blended with alkyl-modified silicone, then transparency is improved, but stability at low temperature and usability such as foaming power deteriorate
Solution Approach 1:
The patent uses a composite of N-acyl acidic amino acid salt and N-acyl neutral amino acid salt instead of alkyl-modified silicone. This amino acid-based composite maintains transparency while preserving low-temperature stability and foaming power through the natural properties of the amino acid structures
Solution Approach 2:
The patent changes the formulation approach from silicone-based transparency agents to amino acid salt-based systems. This parameter change in the chemical basis of the formulation maintains all desired properties including low-temperature performance and foaming characteristics that were lost with silicone additives
Data Source
AI summary
The present invention provides a transparent solid detergent containing (A) N-acyl acidic amino acid salt, (B) acylglycine salt and (C) polyvalent alcohol, at a proportion of (A) 4.5-5000 parts by weight and (C) 2.5-2400 parts by weight, per 1 part by weight of (B), which suppresses coloration by heating during production, is superior in preservation stability at low temperature and high temperature, is low irritant, and shows good sense of use.