The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2009
Filed:
Dec. 29, 2004
Charles A. Cody, Robbinsville, NJ (US);
William Neuberg, Perrineville, NJ (US);
Manshi Sui, Hillsborough, NJ (US);
Youssef Awad, North Brunswick, NJ (US);
Charles A. Cody, Robbinsville, NJ (US);
William Neuberg, Perrineville, NJ (US);
Manshi Sui, Hillsborough, NJ (US);
Youssef Awad, North Brunswick, NJ (US);
Shamrock Technologies Inc., Newark, NJ (US);
Abstract
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 μm 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 self-agglomerate. 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.