| 发明名称 | Process for producing polytetrafluoroethylene fine powder | ||
| 摘要 | A process for producing a polytetrafluoroethylene fine powder including: (1) a step of preparing an aqueous dispersion containing polytetrafluoroethylene, water and a surfactant (A); (2) a step of initiating coagulation of the polytetrafluoroethylene in said aqueous dispersion by agitating said aqueous dispersion; (3) a step of adding a surfactant (B) after the step (2); (4) a step of terminating coagulation after the step (3); (5) a step of collecting a wet powder of the polytetrafluoroethylene; and (6) a step of drying the wet powder of the polytetrafluoroethylene. | ||
| 申请公布号 | US9309335(B2) | 申请公布日期 | 2016.04.12 |
| 申请号 | US201113810323 | 申请日期 | 2011.09.29 |
| 申请人 | DAIKIN INDUSTRIES, LTD. | 发明人 | Miyamoto Masayoshi;Yamanaka Taku;Sawada Yasuhiko |
| 分类号 | C08F14/26;C08F2/20;C08F114/26;C08J3/16;C08F214/26 | 主分类号 | C08F14/26 |
| 代理机构 | Sughrue Mion, PLLC | 代理人 | Sughrue Mion, PLLC |
| 主权项 | 1. A process for producing a polytetrafluoroethylene fine powder, the process comprising: (1) a step of preparing an aqueous dispersion containing polytetrafluoroethylene, water and a surfactant (A); (2) a step of initiating coagulation of the polytetrafluoroethylene in said aqueous dispersion by agitating said aqueous dispersion; (3) a step of adding a surfactant (B) after the step (2); (4) a step of terminating coagulation after the step (3); (5) a step of collecting a wet powder of the polytetrafluoroethylene; and (6) a step of drying the wet powder of the polytetrafluoroethylene. | ||
| 地址 | Osaka JP | ||