PREPARATION OF FILLED POLYTETRAFLUOROETHYLENE PARTICLE

PURPOSE:To effectively prevent the separation of filler by mixing a polytetrafluoroethylene powder with a (semi)hydrophilic filler in a specific two- phase liq. medium. CONSTITUTION:A polytetrafluoroethylene powder having a mean particle diame ter of 100mum or lower is mixed homogeneously with 5-40w...

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Bibliographische Detailangaben
Hauptverfasser:	HONDA NORIMASA, IDEMORI KENJIROU, SAWADA KAZUHIDE, YUGAWA HIROKAZU
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To effectively prevent the separation of filler by mixing a polytetrafluoroethylene powder with a (semi)hydrophilic filler in a specific two- phase liq. medium. CONSTITUTION:A polytetrafluoroethylene powder having a mean particle diame ter of 100mum or lower is mixed homogeneously with 5-40wt.% (semi)hydrophilic filler surface-treated with 0.001-10wt.% aminated org. silane or silicone resin (e.g. gamma-aminopropyltriethoxysilane) and having a particle size of 200 mesh or lower (e.g. a bronze powder) in a two-phase liq. medium comprising 2-10l of water and 0.2-2.0l of at least one halogenated hydrocarbon selected from the group consisting of 2,2-dichloro-1,1,1-trifluoroethane,1,1-dichloro-1-fluoroethane, 1,1-dichloro-1,2,2,3,3-pentafluoropropane, and 1,3-dichloro-1, 1, 2,2, 3- pentafluoropropane.