Low free formaldehyde phenolic polyol formulation

Details Low free formaldehyde phenolic polyol formulation Low free formaldehyde phenolic polyol formulation

C - Chemistry, Metallurgy

08

G

C08G 14/04 (2006.01) B22C 1/22 (2006.01) C08G 8/10 (2006.01) C08G 18/54 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2060682

A resin is prepared by the reaction of a phenol, an aldehyde and an aliphatic hydroxy compound containing two or more hydroxy groups per molecule in the presence of a divalent metal ion catalyst. These resins react with polyisocyanates to form polyurethanes that are useful binders for foundry cores and molds.

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