BLEND FOR MANUFACTURING CORES AND MOLDS IN HEATED EQUIPMENT Russian patent published in 1997 - IPC

Abstract RU 2073583 C1

FIELD: foundry. SUBSTANCE: one component of blend is carbamide-furane resin with molar ratio of carbamide, formaldehyde, and furfuryl alcohol 1: (1.6-1.8): (0.7-1.0) which includes complex hardener containing aqueous solutions of wastes of copper and/or its alloys treated with nitric acid. Molar ratio of initial components ensures formation of resin with reduced content of free formaldehyde up to 1.0% in common with complex hardener. EFFECT: improved performance characteristic of blend. 2 cl, 3 tbl

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RU 2 073 583 C1

Authors

Pukhovitskaja A.N.

Sokolova S.I.

Romanov N.M.

Kolpakov A.A.

Kitaeva L.N.

Polozenko G.N.

Kopylov V.M.

Krasil'Nikova Eh.M.

Pokaljakina L.F.

Rozhkova V.V.

Zuev M.P.

Dates

1997-02-20Published

1994-03-11Filed