Agc Inc.

Agc Chemicals Europe, Limited

Anthony Eugene Wade

Shigeki Kobayashi

Shinya Higuchi

Akiko Tanaka

Hiroki Nagai

Ariana Claudia Morgovan-Ene

Masahiro Takazawa

Diane Caine

Takazawa Masahiro

Kobayashi Shigeki

To provide a modified polytetrafluoroethylene which is excellent in the moldability by paste extrusion and the mechanical property of the molded article. A modified polytetrafluoroethylene fine powder which is a fine powder of a non-melt-moldable modified polytetrafluoroethylene, characterized in that the modified polytetrafluoroethylene comprises units derived from tetrafluoroethylene, units derived from a perfluoroalkyl vinyl ether represented by CF&#x2550;CFO&#x2014;CF(wherein n is an integer of from 1 to 6), and units derived from a perfluoroalkylethylene represented by CH&#x2550;CH&#x2014;CF(wherein m is an integer of from 3 to 6), and that the content of the units derived from the perfluoroalkyl vinyl ether is from 0.1 to 0.25 mass % and the content of the units derived from a perfluoroalkylethylene is from 0.001 to 0.1 mass %, based on all monomer units in the modified polytetrafluoroethylene.

Modified polytetrafluoroethylene fine powder and method for its production, and method for producing tube or hose

To provide a PTFE aqueous dispersion which is excellent in mechanical stability, while being not susceptible to foaming. A polytetrafluoroethylene aqueous dispersion which is characterized by containing from 15 to 70 mass % of PTFE particles having an average primary particle diameter of from 0.1 to 0.5 &#x3bc;m; from 0.1 to 20,000 ppm, to the PTFE particles, of a fluorinated emulsifier selected from a Cfluorinated carboxylic acid which may have an etheric oxygen atom, and salts of thereof; from 1 to 20 parts by mass, to 100 parts by mass of the PTFE particles, of a nonionic surfactant represented by R&#x2014;O-A-H (wherein Ris a Calkyl group, and A is a polyoxyalkylene chain); from 0.004 to 0.040 parts by mass, to 100 parts by mass of the PTFE particles, of a polyether polysiloxane copolymer, wherein the polyether chain consists solely of a polyoxypropylene group; and water.

Polytetrafluoroethylene aqueous dispersion

To optimize the primary particle size of a modified PTFE fine powder to shorten the sintering time during the extrusion molding. A modified polytetrafluoroethylene fine powder which is a fine powder of a non-melt-processable modified polytetrafluoroethylene comprising units derived from tetrafluoroethylene, units derived from hexafluoropropylene, units derived from a perfluoro(alkyl vinyl ether) represented by CF&#x2550;CFO&#x2014;CF(n is an integer of from 1 to 6) and units derived from a (perfluoalkyl)ethylene represented by CH&#x2550;CH&#x2014;CF(m is an integer of from 3 to 7).

Modified polytetrafluoroethylene fine powder and its manufacturing method, and electric wire and tube using it

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Lancashire, United Kingdom

Anthony Eugene Wade