	US 7,462,666 B2
	Method for making nanocomposite materials
Robert Augustine Ottaviani, Anthem, Ariz. (US); William R. Rodgers, Bloomfield Township, Mich. (US); Paula D. Fasulo, Eastpointe, Mich. (US); and David A. Okonski, Lake Orion, Mich. (US)
Assigned to General Motors Corporation, Detroit, Mich. (US)
Filed on May 11, 2004, as Appl. No. 10/843,228.
Prior Publication US 2005/0256242 A1, Nov. 17, 2005
Int. Cl. C08K 3/34 (2006.01); C08J 3/20 (2006.01)

U.S. Cl. 524—445 [524/447]

35 Claims

1. A method for making a nanocomposite material, the method comprising the steps of:

providing a molten polymeric material in an extruder;

introducing a solution including a nanofiller material and a supercritical fluid into a molten polymeric material; and

causing the supercritical fluid within the solution to substantially instantaneously convert to a gas phase, thereby forming the nanocomposite material having the nanofiller material substantially homogeneously dispersed therein.