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发明申请
US20080200571A1 AQUEOUS POLYTETRAFLUOROETHYLENE EMULSION, POLYTETRAFLUOROETHYLENE FINE POWDER AND POROUS MATERIAL OBTAINED THEREFROM 有权
水性聚四氟乙烯乳液，聚四氟乙烯精细粉末和多孔材料

AQUEOUS POLYTETRAFLUOROETHYLENE EMULSION, POLYTETRAFLUOROETHYLENE FINE POWDER AND POROUS MATERIAL OBTAINED THEREFROM
摘要：
To provide an aqueous polytetrafluoroethylene (PTFE) emulsion which does not substantially contain ammonium perfluorooctanoate, and which is obtained by emulsion polymerization. Further, to provide a PTFE fine powder which is obtained from the aqueous PTFE emulsion and is excellent in a paste extrusion processability, and a porous material.An aqueous polytetrafluoroethylene emulsion obtained by carrying out emulsion polymerization of tetrafluoroethylene alone or together with another copolymerizable monomer in an aqueous medium, wherein a fluorinated emulsifier of the formula (1): XCF2CF2(O)mCF2CF2OCF2COOA wherein X is a hydrogen atom or a fluorine atom, A is a hydrogen atom, an alkali metal or NH4, and m is an integer of 0 or 1, is used in an amount of from 1,500 to 20,000 ppm, based on the final yield of polytetrafluoroethylene.
摘要（中）：

提供基本上不含全氟辛酸铵的水性聚四氟乙烯（PTFE）乳液，其通过乳液聚合获得。 此外，提供由PTFE水性乳液得到的PTFE微细粉末，并且具有优异的糊料挤出加工性能和多孔材料。 通过在水性介质中单独或与另一种可共聚单体一起进行四氟乙烯的乳液聚合而获得的聚四氟乙烯乳液，其中式（1）的氟化乳化剂：＆lt;线内公式描述=“在线式” end =“lead”？> XCF 2 CF 2（O）2 CF 2 CF 2 OCF 2 COOA <？in-line-formula description =“In-line Formulas”end =“tail”？>其中X是氢原子或氟原子，A是 基于聚四氟乙烯的最终产率，氢原子，碱金属或NH 4，m为0或1的整数，其用量为1,500至20,000ppm。

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