Shell sand coated with novolak resin and epoxy and/or...

Details Shell sand coated with novolak resin and epoxy and/or... Shell sand coated with novolak resin and epoxy and/or...

B - Operations, Transporting

22

C

22/158, 117/48

B22C 1/22 (2006.01)

Patent

CA 1050831

ABSTRACT OF THE DISCLOSURE A resin coated sand comprising: (a) particles of sand coated with from about 1% to about 8% by weight sand of phenol-formaldehyde novelak resin,. (b) a curing agent; and (c) from about 2% to about 50%, by weight of phenol-formaldehyde novolak resin of an epoxy and/or phenoxy resin. The resin coated sands of the present invention provide improved thermal shock resistance without creating smoke and odor problems. In addition, the resin coated sands of the invention posess good tensile strength. - 1 -

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