Extended Chain Surfactant Blends for Low-Caustic Laundry Cleaning
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Solution Overview
Problem
Current detergents rely heavily on caustics and nonylphenol ethoxylates (NPEs), which are environmentally harmful and ineffective against challenging stains like those from sunscreens containing oxybenzone and avobenzone, leading to fabric discoloration and safety concerns.
Innovation Solution
Development of a surfactant system using synergistic combinations of anionic and nonionic extended chain surfactants that reduce dependence on caustics and effectively remove difficult stains, including those from sunscreens, by shifting the optimal alkalinity to lower levels and incorporating a laundry booster with amine oxide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional detergents use caustics for soil removal, then cleaning effectiveness is improved, but user safety and fabric integrity deteriorate
Solution Approach 1:
The patent changes the chemical parameters of the detergent system by replacing caustic-based cleaning mechanisms with surfactant-based mechanisms. Specifically, it uses extended chain surfactants with modified molecular structures that provide effective cleaning through surface tension reduction and emulsification rather than caustic action, thereby maintaining cleaning effectiveness while eliminating harmful effects
Solution Approach 2:
The patent extracts and removes caustics from the detergent formulation entirely, replacing them with alternative surfactant systems. This extraction of the harmful substance while maintaining the cleaning function through different chemical means directly resolves the contradiction between cleaning effectiveness and safety
2Productivity
If NPEs are used as surfactants, then cleaning ability is improved, but environmental safety deteriorates
Solution Approach 1:
The patent extracts NPEs from the detergent formulation and replaces them with environmentally safer surfactant alternatives. The removal of NPEs eliminates the source of environmental contamination while the alternative surfactants maintain the required cleaning ability
Solution Approach 2:
The patent employs composite surfactant systems combining multiple surfactant types (extended chain surfactants, alcohol ethoxylates, alkyl polyglucosides) to achieve the cleaning performance previously provided by NPEs, while the composite nature provides better environmental compatibility and biodegradability
3Object-generated harmful factors
If caustics are increased to compensate for NPE removal, then environmental friendliness is improved, but cleaning effectiveness and safety deteriorate
Solution Approach 1:
The patent changes the chemical parameters of the surfactant system by using extended chain surfactants with specific molecular structures that provide effective cleaning at lower concentrations and lower pH levels. This eliminates the need to increase caustics while maintaining cleaning effectiveness and environmental friendliness
Solution Approach 2:
The extended chain surfactants act as intermediaries that bridge the gap between environmental safety and cleaning effectiveness. These surfactants enable effective soil removal through mechanisms that do not require high caustic levels, thus serving as a mediator between the two opposing requirements
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 surfactant system enhances cleaning ability, reduces fabric damage, and improves safety by minimizing caustic use, effectively removing challenging stains without re-deposition, even when set by high pH and bleach.
Implementation Method 1
Surfactants reduce the surface tension of water by adsorbing at the liquid-gas interface
Implementation Method 2
Surfactants reduce the surface tension of water by adsorbing at the liquid-gas interface
Implementation Method 3
They also reduce the interfacial tension between oil and water by adsorbing at the liquid-liquid interface
Implementation Method 4
They also reduce the interfacial tension between oil and water by adsorbing at the liquid-liquid interface
Implementation Method 5
Each surfactant molecule has a hydrophilic head that is attracted to water molecules
Implementation Method 6
a hydrophobic tail that repels water and simultaneously attaches itself to oil and grease in dirt
Implementation Method 7
These opposing forces loosen the dirt and suspend it in the water
Data Source
AI summary
The invention discloses synergistic combinations of surfactants blends and cleaning composition. In certain embodiments a surfactant system is disclosed which includes extended anionic surfactants, linker surfactants, and a multiply charged cation component. This system forms emulsions with, and can remove greasy and oily stains, even those comprised of non-trans fats. In another embodiment anionic surfactants are combined with a solvent, and amine oxide to remove sunscreen stains. The compositions may be used alone, as a pre-spotter or other pre-treatment or as a part of a soft surface or hard surface cleaning composition.