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LIGNITE-BASED URETHANE RESINS WITH ENHANCED SUSPENSION PROPERTIES AND FOUNDRY SAND BINDER PERFORMANCE
LIGNITE-BASED URETHANE RESINS WITH ENHANCED SUSPENSION PROPERTIES AND FOUNDRY SAND BINDER PERFORMANCE
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机译:具有增强的悬浮性能和基础砂浆粘结性能的褐铁矿基聚氨酯树脂
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摘要
Described herein, in the preferred embodiment, is a leonardite-based polyurethane resin binder that may be used, among other applications, as a binder in combination with foundry aggregate, e.g., sand, for molding or casting metal parts. The binders described herein comprise a humic substance, preferably leonardite, combined with a polymerizable polyol, an isocyanate, and a polymerization catalyst to make a polyurethane resin binder in situ in a foundry aggregate, such as sand. The lignite is mixed with the polymerizable polyol, thickening and dispersing agents as additives to improve the suspension quality and binder performance of the lignite-containing part of the binder components.
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