Method of manufacturing mould members of polyurethane-bonded gra

Details Method of manufacturing mould members of polyurethane-bonded gra Method of manufacturing mould members of polyurethane-bonded gra

1975-06-02

1976-10-12

Czaja, Donald E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 328N, 260 336UB, 260 338UB, 260 37N, C08K 335

Patent

active

039856992

ABSTRACT:
A method for manufacturing mould members which comprises mixing together a granular material such as sand; a polyurethane forming cold-hardenable bonding agent composition; and a solvent for the bonding agent composition wherein the solvent has an evaporation rate which corresponds to a reference value of 100-800 when the normal butyl acetate has a value of 100 and pure acetone has a reference value of 1,000; shaping the mixture into a predetermined form; and blowing gaseous amine through the mixture to catalyze the formation of the polyurethane bonding agent.

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