Resin coated sand for casting

Details Resin coated sand for casting Resin coated sand for casting

1983-10-17

1985-07-16

Schofer, Joseph L.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523147, 428404, 528153, 528155, C08K 506

Patent

active

045297517

ABSTRACT:
A phenolic resin for application in foundry shell molding operations having improved properties is disclosed. The phenolic resin is prepared by reacting aldehydes and a mixture of bisphenol A and bisphenol F to prepare a phenolic resin for coating foundry aggregates or sand to prepare shell molds having low thermal expansion and improved shake out properties.

REFERENCES:
patent: 4345003 (1982-08-01), Matsushima et al.
patent: 4358570 (1982-11-01), Tobinaga
patent: 4459377 (1984-07-01), Saeki et al.
patent: 4460717 (1984-07-01), Saeki et al.
J. K. Stille, "Introduction to Polymer Chem.", John Wiley and Sons, Inc., N.Y., (1962), pp. 102-103.

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