Foundry binder of epoxy resin, acrylated polyisocyanate and...

B - Operations – Transporting – 22 – C

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B22C 1/22 (2006.01) C08F 283/10 (2006.01) C08G 18/58 (2006.01) C08G 18/81 (2006.01) C08G 59/40 (2006.01) C08K 3/34 (2006.01) C08L 63/02 (2006.01) C08L 63/04 (2006.01)

Patent

CA 2342791

A foundry binder addressing the problems of reduced flowability leading to reduced strength and providing prolonged benchlife leading to higher tensile strength is produced from (a) an epoxy resin, (b) an acrylated polyisocyanate, (c) an acrylic monomer and/or polymer and (d) an oxidizing agent. The binder is mixed with foundry aggregate and cured with a gaseous amine via a cold-box process to obtain a foundry shape useful as a mold for casting a metal article.

Un liant de fonderie destiné à résoudre les problèmes d'une fluidité réduite entraînant une résistance réduite et à fournir des performances prolongées conduisant à une résistance à la traction plus élevée, est fabriqué à partir de (a) une résine époxy, (b) un polyisocyanate acrylé, (c) un monomère et/ou un polymère acrylique et (d) un agent oxydant. Le liant est mélangé avec des agrégats de fonderie et durci avec une amine à l'état gazeux, via un processus cold-box, de manière à obtenir une forme de fonderie utilisée comme moule de coulée d'un article métallique.

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