Foam Control Composition for High-Wash and Fast-Rinse Suds
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Solution Overview
Problem
Current laundry detergents face challenges in achieving strong suds formation during washing while requiring quick suds elimination during rinsing, which is essential for environmental sustainability and cost savings, without compromising cleaning performance or consumer perception.
Innovation Solution
A foam control composition comprising hydrophobically modified cationic polymers, specifically derived from cationic ethylenically unsaturated monomers, epoxy-functional monomers, water-soluble monomers, and reactive siloxanes, which are formulated to maintain high suds levels during washing and rapidly collapse in the rinse cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If conventional foam control agents are used to reduce suds during rinse cycle, then suds elimination is improved, but suds formation during wash cycle is suppressed
Solution Approach 1:
The foam control composition uses a dynamic system where the cationic polymer's foam control activity is activated selectively during the rinse cycle through pH change or ionic strength modification, allowing the system to adapt its behavior between wash and rinse phases. The polymer transitions from a low-activity state during washing to a high-activity state during rinsing, enabling differential foam control.
Solution Approach 2:
The invention exploits changes in physical or chemical parameters (pH, ionic strength, temperature) between wash and rinse cycles to modulate the foam control agent's effectiveness. The cationic polymer's conformation and interfacial activity are sensitive to these parameter changes, allowing it to remain relatively inactive during washing but become highly active during rinsing when parameters shift.
2Loss of substance
If de-foamer products are added during rinse cycles to eliminate suds, then suds removal is improved, but cost increases
Solution Approach 1:
The cationic polymer leverages natural parameter changes occurring during the transition from wash to rinse cycle (pH increase, ionic strength decrease) to activate its foam control function. This eliminates the need for additional expensive de-foamer chemicals, as the same polymer in the formulation automatically becomes active under rinse conditions.
Solution Approach 2:
The foam control composition is self-activating during the rinse cycle without requiring additional chemical additives. The cationic polymer inherently responds to rinse conditions and performs the foam control function autonomously, making the system self-sufficient and cost-effective.
3Loss of energy
If suds level is reduced overall to save water and labor, then environmental sustainability is improved, but cleaning performance perception deteriorates
Solution Approach 1:
The system dynamically controls foam levels throughout the washing process, maintaining high suds formation during the wash cycle to ensure cleaning performance and consumer satisfaction, then rapidly eliminating suds during the rinse cycle to enable single-rinse operation and reduce water consumption.
Solution Approach 2:
The foam control agent acts periodically, being relatively inactive during the wash phase to allow suds formation, then becoming highly active during the rinse phase to eliminate suds. This periodic activation pattern aligns with the operational cycles of washing and rinsing.
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
This solution enables a single rinse cycle, improves rinse clarity, enhances fabric feel, and maintains effective cleaning performance, while reducing water consumption and labor costs.
Implementation Method 1
a foam control composition comprising a hydrophobically modified cationic polymer... which exhibits improved suds removal in the rinse cycle
Implementation Method 2
The cleaning composition can be relevant to an anionic detersive surfactant system... maintain high suds levels during washing
Data Source
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AI summary
Disclosed are cleaning composition, preferably a laundry detergent composition, comprising a foam control composition comprising a hydrophobically modified cationic polymer, as well as processes for making and method of using such compositions. The composition provides for enhanced suds removal during the rinse cycle with minimal or nil impact on suds volume during the wash cycle.