Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1982-10-19
1984-07-10
Jacobs, Lewis T.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524424, 524425, C08K 326
Patent
active
044593767
ABSTRACT:
A process for the preparation of a resin-coated sand for use in shell-molding operations wherein the molding operation is designed for metals such as aluminum, magnesium and their alloys which have a lower-melting temperature than iron. The process involves the coating of foundry sand with a phenolic resin incorporating a carbonate and/or bicarbonate of elements selected from groups Ia, IIa, IIIb, IVb, Vb, VIb, VIIb or VIII. This process produces a resin-coated sand with improved shake-out properties of the casting molds.
REFERENCES:
patent: 4290928 (1981-09-01), Funabiki et al.
patent: 4317896 (1982-03-01), Holik
Matsushima Noriaki
Saeki Yukio
Tokunaga Yukio
Jacobs Lewis T.
Mudd James F.
Sumitomo Durez Company Ltd.
Tao James F.
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