Resin coated sand and method for producing same

Details Resin coated sand and method for producing same Resin coated sand and method for producing same

1982-08-20

1983-11-29

Jacobs, Lewis T.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

428404, C08K 336

Patent

active

044181612

ABSTRACT:
This invention relates to a method for the production of an improved resin coated lubricated sand for use in shell molding processes, wherein the resin coated sand is especially useful in casting operations using aluminum, magnesium and their alloys.
The sand is coated with a phenolic type resin containing a lubricant and an additive to assist in the thermal decompositions of the binder to provide a more efficient removal of the sand grains. The additive is an organic bromide compound of the type: ##STR1## wherein: n and m are integers 0, 1 or 2, and n and m cannot be O at the same time.

REFERENCES:
patent: 4196114 (1980-04-01), Funabiki et al.
patent: 4252700 (1981-02-01), Funabiki et al.
patent: 4345003 (1982-08-01), Matsushima et al.

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