Cold-box foundry binder systems having improved shakeout

Details Cold-box foundry binder systems having improved shakeout Cold-box foundry binder systems having improved shakeout

B - Operations, Transporting

22

C

B22C 1/22 (2006.01) B22C 1/14 (2006.01) B22C 9/02 (2006.01) B22D 1/00 (2006.01) B22D 23/00 (2006.01)

Patent

CA 2480517

This invention relates to foundry binder systems, which will cure in the presence of sulfur dioxide and a free radical initiator, comprising (a) an aliphatic epoxy resin; (b) a multifunctional acrylate; and (c) an effective amount of a free radical initiator. The foundry binder systems are used for making foundry mixes. The foundry mixes are used to make foundry shapes (such as cores and molds) which are used to make metal castings, particularly aluminum castings.

L'invention concerne des liants pour fonderie qui durcissent en présence de dioxyde de soufre et d'un initiateur de polymérisation radicalaire. Ces liants comprennent : (a) une résine époxy aliphatique ; (b) un acrylate multifonctionnel ; et (c) une quantité efficace d'un initiateur de polymérisation radicalaire. Ces liants pour fonderie sont utilisés pour la fabrication de mélanges pour fonderie. Les mélanges pour fonderie sont utilisés pour réaliser des formes pour fonderie (telles que des noyaux et des moules) qui sont elles-mêmes utilisées pour la réalisation de pièces métalliques moulées, en particulier de pièces moulées en aluminium.

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