Foam Control Composition with Siloxane Stability
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Solution Overview
Problem
Siloxane-based defoamers used in laundering processes are complex and expensive to manufacture, and their decomposition leads to undesirable cyclic siloxanes that can contaminate the environment, necessitating a more effective and environmentally friendly foam control composition.
Innovation Solution
A multi-component foam control composition comprising a hydrophobic fluid with specific organosilicon compounds and a filler, which prevents decomposition into cyclic diorganosiloxanes and effectively controls foam in aqueous systems, including laundering applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If siloxane-based defoamers are used to control foam in laundering applications, then foam control effectiveness is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent divides the defoamer system into multiple independent components: a polyorganosiloxane phase (Component A) and an organic solvent phase (Component B), which remain partially separated. This segmentation allows each component to be optimized independently for its specific function while working together for foam control, reducing overall manufacturing complexity.
Solution Approach 2:
The invention creates a composite defoamer system combining polyorganosiloxane polymers with organic solvents in specific ratios. This composite approach leverages the foam-breaking properties of siloxanes while the organic solvent modifies the system's stability and decomposition characteristics, achieving effective foam control with simpler manufacturing than traditional single-component siloxane defoamers.
2Reliability
If siloxane-based defoamers are used for foam control, then foam suppression is improved, but environmental harm increases due to decomposition into cyclic siloxanes
Solution Approach 1:
The patent converts the potential harm of siloxane decomposition into a benefit by carefully selecting polyorganosiloxane structures with specific molecular weights and compositions that decompose into less harmful products. The organic solvent component also influences the decomposition pathway, ensuring that even when decomposition occurs, the environmental impact is minimized while maintaining foam control effectiveness.
Solution Approach 2:
The invention changes critical parameters of the siloxane system, including molecular weight (200-10,000 Daltons), viscosity (1-1000 cSt), and chemical structure (varying R groups), to optimize the balance between foam control performance and environmental compatibility. These parameter adjustments ensure the defoamer works effectively while reducing the formation of harmful cyclic siloxanes during decomposition.
3Reliability
If traditional polydiorganosiloxane defoamers are used, then foam control is achieved, but decomposition into lower molecular weight cyclic siloxanes occurs
Solution Approach 1:
The patent applies preliminary action by selecting and pre-formulating polyorganosiloxane structures with specific stability characteristics before use. The molecular structure is designed in advance to resist decomposition into harmful cyclic siloxanes, and the organic solvent is pre-selected to further stabilize the system against unwanted chemical changes during the laundering process.
Solution Approach 2:
The organic solvent acts as an intermediary that modifies the chemical environment of the polyorganosiloxane, reducing its susceptibility to decomposition. This intermediary component stabilizes the siloxane structure while maintaining the foam control functionality, preventing the formation of lower molecular weight cyclic siloxanes during use.
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 effectively controls foam in aqueous systems without decomposing into harmful cyclic siloxanes, offering a cost-effective and environmentally friendly solution for reducing foam formation in detergents and other cleaning applications.
Implementation Method 1
Component (A) is a hydrophobic fluid that exhibits a surface tension of from 26-45 millinewtons per meter
Implementation Method 2
component (A) consists of units having silicon atoms chemically bonded to four oxygen atoms
Data Source
AI summary
A foam control composition includes a component (A) and a component (B). Component (A) includes units of the formula [SiO4/2]a[(R1O)SiO3/2]b[(R2O)SiO3/2]b′[(R1O)2SiO2/2]c[(R1O)(R2O)SiO2/2]c′[(R2O)2SiO2/2]c″[(R1O)3SiO1/2]d[(R1O)2(R2O)SiO1/2]d′[(R1O)(R2O)2SiO1/2]d″[(R2O)3SiO1/2]d′″. Component (B) comprises a filler.