Method to improve flowability of alkaline phenolic resin...

Details Method to improve flowability of alkaline phenolic resin... Method to improve flowability of alkaline phenolic resin...

B - Operations, Transporting

22

C

22/164, 400/7328

B22C 1/22 (2006.01) C04B 26/12 (2006.01)

Patent

CA 2014684

A process for improving the flowability of resin coated sand which comprises the use of a flow promoter with the mixture of sand and resin. Also provided is a foundry mix comprising foundry sand, a resin binder and the flow promoter, as well as a process for making foundry cores and molds using the foundry mix. The resins are ester-curable alkaline phenolic resole resins. The flow promoter is selected from the group consisting of fatty acids, fatty alcohols, fatty amines, fatty amides and fatty alkanolamides.

Divulgation d'un procédé pour améliorer la fluence de sable enduit de résine, comprenant l'utilisation d'un accélérateur de flux avec le mélange de sable et de résine. On divulgue aussi un mélange pour fonderie comprenant du sable de fonderie, un liant résineux et l'accélérateur de flux, ainsi qu'un procédé pour fabriquer des noyaux et des moules de fonderie à l'aide de ce mélange. Les résines utilisées sont des résols alcalins durcissables à l'aide d'un ester. L'accélérateur de flux est choisi parmi le groupe constitué des matières suivantes : acides gras, alcools gras, amines grasses, amides gras et alcanolamides gras.

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