Shamrock Technologies Inc.

Shamrock Chemicals Corporation

Other

Shamrock Chemical Corporation

William B Neuberg

Robert Luniewski

Manshi Sui

Youssef Awad

Charles A Cody

John J Aclin

Paul Carey

A method for treating polytetrafluoroethylene (PTFE) in its reactor latex form to produce a dry submicron PTFE powder that remains stable without rheology modifiers, surfactants, wetting agents, pH adjusters or other stabilizing additives. Reactor latex PTFE formed during an emulsion polymerization process can be irradiated, with an electron beam or gamma rays, during or after the polymerization to form a product where the dry submicron PTFE powder is free-flowing, tends not to self-agglomerate and tends not to dust into the air upon handling so that the PTFE is readily dispersible when placed in a desired application system or medium.

Method for producing submicron polytetrafluoroethylene powder and products thereof

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 &#x3bc;m 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.

Methods for producing submicron polytetrafluoroethylene powder and products thereof

A system for continuously processing PTFE by irradiation and grinding includes a processing vessel having first and second horizontally adjacent agitators in first and second transversely adjacent vessel portions. The bottom of the vessel has a step between the portions whereat heated air is injected for agitating and grinding the PTFE.

Continuous process for irradiating of polytetrafluoroethylene (PTFE)

A sharpening holder and a knife are uniquely configured for use with each other, the holder and the knife having permanent elements that mate when the holder is installed on the knife so that the holder is installed on the knife in exactly the same position on the knife every time that the knife is sharpened.

Knife and sharpening holder

Continuous process for irradiating of polytetrafluorineethylene (PTFE)

A method and apparatus for radiation degradation processing of polytetrafluoroethylene makes use of a simultaneous irradiation, agitation and cooling. The apparatus is designed to make efficient use of radiation in the processing.

Apparatus and method for radiation processing of materials

An improved process for curing solvent free inks using resin powder makes use of a caulstock laminate which is applied against a printed surface bearing ink and resin powder. The printed material and the caulstock are heated, pressed together and then cooled.

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Perrineville, NJ, United States of America

William B Neuberg