Surfactant Composition for Foamed Sand Rapid Foaming
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Solution Overview
Problem
Existing surfactant compositions for foamed sand do not adequately address the need for rapid-foaming properties and improved mold strength in sand core production, as they require a balance between foaming and binding performance.
Innovation Solution
A surfactant composition comprising 80 to 99.8 mass % of a polyoxyethylene alkyl ether sulfate ester salt, 0.1 to 10 mass % of an alkyl sulfate ester salt, and 0.1 to 10 mass % of an amphoteric surfactant, which enhances the rapid-foaming property and mold strength of foamed sand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a surfactant composition is added to improve foaming and flowing state, then the foaming property is improved, but the binding performance may be compromised
Solution Approach 1:
The patent employs a composite surfactant system comprising three specific components: polyoxyethylene alkyl ether sulfate ester salt (80-99.8 mass%), alkyl sulfate ester salt (0.1-10 mass%), and amphoteric surfactant (0.1-10 mass%). This composite formulation synergistically combines the foaming capabilities of sulfate ester salts with the binding performance of amphoteric surfactants, resolving the contradiction between foaming property and binding performance.
Solution Approach 2:
The patent optimizes the concentration ranges of each surfactant component to achieve the desired balance. By controlling the polyoxyethylene alkyl ether sulfate ester salt at 80-99.8 mass% and the other components at 0.1-10 mass%, the formulation maintains both rapid foaming and adequate binding performance, demonstrating parameter optimization to resolve the technical contradiction.
2Stability of the object's composition
If conventional surfactant compositions are used, then the foaming process is stabilized, but the rapid-foaming property and mold strength are insufficient
Solution Approach 1:
The patent assigns specific functional roles to different surfactant components within the mixture. The polyoxyethylene alkyl ether sulfate ester salt provides the primary foaming action and stability, while the alkyl sulfate ester salt and amphoteric surfactant contribute specifically to rapid foaming and mold strength. This differentiation of functional qualities among components achieves both stability and rapid foaming.
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 allows for rapid foaming and the production of molds with high strength, as demonstrated by improved kinematic viscosity and flexural strength measurements.
Implementation Method 1
a surfactant composition for foamed sand which is excellent in rapid-foaming property of the foamed sand and capable of improving the strength of a mold
Implementation Method 2
by agitating a particulate bone material, water-soluble binder and water to obtain foamed mixture
Data Source
AI summary
A surfactant composition for a foamed sand including 80 to 99.8 mass % of a compound (A) represented by formula (1); 0.1 to 10 mass % of a compound (B) represented by formula (2); and 0.1 to 10 mass % of an amphoteric surfactant (C):R1O-(EO)n—SO3M1 (1)wherein R1 represents a hydrocarbon group having 6 to 22 carbons, EO represents oxyethylene group, n is 1 to 10, and M1 represents an alkali metal, an alkaline earth metal, ammonium or an organic ammonium;R2O—SO3M2 (2)wherein R2 represents a hydrocarbon group having 6 to 22 carbons, and M2 represents an alkali metal, an alkaline earth metal, ammonium or an organic ammonium.