Polyurethane binder compositions

B - Operations – Transporting – 22 – C

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22/164, 402/45,

B22C 1/00 (2006.01) B22C 1/16 (2006.01) B22C 1/20 (2006.01) B22C 1/22 (2006.01) C08G 8/10 (2006.01) C08G 18/54 (2006.01)

Patent

CA 1251597

POLYURETHANE BINDER COMPOSITIONS ABSTRACT OF THE DISCLOSURE A foundry binder composition which provides foundry cores and molds of superior hot strength comprises a polyisocyanate, a polyhydroxy component and a catalyst. The polyhydroxy component is an alkoxy modified phenolic resole resin containing at least one alkoxy methylene group for every six phenolic nuclei in the resin. -39-

491486

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