Coated sand and method for producing
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United States of America Patent
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Aug 28, 1984
Grant Date -
N/A
app pub date -
Nov 2, 1982
filing date -
Nov 2, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A resin coated sand for shell-molding processes is provided comprising the coating of foundry sand or aggregates with a phenolic resin and a carboxylic acid salt. The carboxylic acid salt is selected from a carboxylic acid salt of an element selected from groups Ia, Ib, IIa, IIb, IIIa, IVa, Va, VIb, VIIa, VIIb or VIII of the Periodic Table of Elements. The proportion of carboxylic acid salt to phenolic resin is from 0.5 to 40 parts carboxylic acid salt to 100 parts phenolic resin. This resin coated sand produces shell-molds having excellent properties for casting, and allows the molded article to be removed in an easy and efficient manner.
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