US 7,507,284 B2
	Sandcasting pattern coating compositions containing graphite
Victor S. LaFay, Cincinnati, Ohio (US); and Stephen L. Neltner, Alexandria, Ky. (US)
Assigned to The Hill and Griffith Company, Cincinnati, Ohio (US)
Filed on Sep. 17, 2004, as Appl. No. 10/944,471.
Prior Publication US 2006/0062905 A1, Mar. 23, 2006
Int. Cl. B28B 7/38 (2006.01); B28B 7/36 (2006.01); B05D 1/00 (2006.01); C09D 5/00 (2006.01); C09D 191/00 (2006.01)

U.S. Cl. 106—38.22  [106/2; 106/38.24; 427/133; 427/134; 427/230]

18 Claims

1. A pattern coating composition in the form of an oil-in-water emulsion comprising oil, water, graphite, a water dispersible amine, and a clay reactive with the amine to form an organophylic clay wherein the pattern coating composition comprises from about 0.05 to about 20 weight percent graphite and develops lustrous carbon at a mold metal interface when applied to mold pattern surfaces during sand casting.