Solventless polyurethane no-bake foundry binder

Details Solventless polyurethane no-bake foundry binder Solventless polyurethane no-bake foundry binder

B - Operations, Transporting

22

C

B22C 1/20 (2006.01) B22C 1/22 (2006.01)

Patent

CA 2358538

This invention relates to a solventless polyurethane no-bake foundry binder system comprising, as individual components (a) a polyol component comprising a polyether polyol, glycol, and an aromatic polyester polyol, (b) an organic polyisocyanate component, and (c) a liquid tertiary amine catalyst component. Foundry mixes are prepared by mixing the binder system with a foundry aggregate by a no-bake process. The resulting foundry shapes are used to cast metal parts from ferrous and non-ferrous metals.

L'invention concerne un système de liants de fonderie en polyuréthanne durcissant à froid, sans solvant, comprenant, comme composés individuels (a) un composant polyol constitué d'un polyéther polyol, d'un glycol, et d'un polyester polyol aromatique, (b) un composant de polyisocyanate organique, et (c) un composant catalyseur liquide d'amine tertiaire. Les mélanges de fonderie sont préparés par mélange du système de liant avec un agrégat pour fonderie au moyen d'un processus de durcissement à froid. Les profilés de fonderie résultants sont utilisés pour couler des pièces métalliques à partir de métaux ferreux ou non ferreux.

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