METHODS FOR PRODUCING SUBMICRON POLYTETRAFLUOROETHYLENE POWDER AND PRODUCTS THEREOF

WIPO Patent Application WO2003106540

A3

A method for producing submicron polytetrafluoroethylene ("PTFE") powder in a free-flowing, readily dispersible form. The irradiated PTFE starting material is placed in a desired solvent and undergoes grinding until the PTFE particles reach submicron size. The submicron particles are subsequently recovered from the solvent and dried to form a powder that may have particles less than 1.00 [tm in size. The dry PTFE powder may then be readily dispersed to submicron size into a desired application system. The submicron PTFE powder of this method is free-flowing, readily dispersible in various application systems, tends not to "dust" or selfagglomerate. Improved aqueous and organic dispersions of submicron PTFE particles may also be formed that display increased stability and require much less agitation than other processes of forming such dispersions. Such improved PTFE dispersions may be formed with or without the addition of surfactants, wetting agents, rheology modifiers, pH-adjusting agents, and the like.

JP2003527986	[Title of Invention] A method for improving the adhesive stability of the surface of a plastic molded product.
JP2004176045	SMOOTH, FLEXIBLE POWDER COATING
JP2633920	INDUSTRIAL APPLICABILITY: A conductive molding resin composition and an electromagnetic wave shield structure.

CODY CHARLES A (US)
NEUBERG WILLIAM (US)
SUI MANSHI (US)
AWAD YOUSSEF (US)

PCT/US2003/007978

May 13, 2004

March 14, 2003

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SHAMROCK TECH INC (US)
CODY CHARLES A (US)
NEUBERG WILLIAM (US)
SUI MANSHI (US)
AWAD YOUSSEF (US)

C08J3/12; C08J3/28; (IPC1-7): B29B9/00

US3766031A	1973-10-16
US5263256A	1993-11-23
US4220511A	1980-09-02
US5916929A	1999-06-29

See also references of EP 1487905A4

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