FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing fine polytetrafluoroethylene (PTFE) powder. The method involves emulsion polymerisation of tetrafluoroethylene in the presence of an aqueous medium, a fluorinated surfactant and a radical polymerisation initiator to obtain an aqueous emulsion of PTFE, stirring and coagulation of the aqueous emulsion to separate fine PTFE powder and then drying the wet fine PTFE powder in an atmosphere containing ammonia or in the presence of an ammonia-generating compound.
EFFECT: obtaining fine PTFE powder which is characterised by low paste extrusion pressure.
10 cl, 1 tbl, 14 ex
| Title |
Year |
Author |
Number |
| METHODS OF PRODUCING AQUEOUS EMULSION, FINE POWDER AND STRETCHED POROUS BODY OF MODIFIED POLYTETRAFLUOROETHYLENE |
2016 |
- Khiguti Sinia
- Nagai Khiroki
- Kobayasi Sigeki
|
RU2713209C2 |
| METHOD OF PRODUCING FINE POLYTETRAFLUORETHYLENE POWDER |
2009 |
- Khiguti Sinia
- Matsuoka Jasukhiko
- Kobajasi Sigeki
|
RU2478653C2 |
| MODIFIED POLYTETRAFLUOROETHYLENE AND ITS PRODUCTION METHOD |
2018 |
- Higuchi, Shinya
- Takazawa, Masahiro
- Kose, Takehiro
|
RU2772427C2 |
| MODIFIED POLYTETRAFLUORETHYLENE, MOLDED PRODUCT AND METHOD FOR PRODUCTION OF STRETCHED POROUS MATERIAL |
2018 |
- Higuchi, Shinya
- Ebata, Shiro
- Kose, Takehiro
|
RU2783025C2 |
| METHOD FOR PRODUCING MODIFIED POLYTETRAFLUORETHYLENE, METHOD FOR PRODUCING POWDER OF MODIFIED POLYTETRAFLUORETHYLENE, AND METHOD FOR PRODUCING STRETCHED POROUS MATERIAL |
2018 |
- Higuchi, Shinya
- Ebata, Shiro
- Kose, Takehiro
|
RU2772431C2 |
| POLYTETRAFLUOROETHYLENE WATER EMULSION AND METHOD FOR OBTAINING THEREOF, POLYTETRAFLUOROETHYLENE WATER DISPERSION, OBTAINED IN APPLICATION OF SAID WATER EMULSION, POLYTETRAFLUOROETHYLENE FINELY DISPERSE POWDER AND STRETCHED POROUS MATERIAL |
2010 |
- Khiguti Sinia
- Matsuoka Jasukhiko
- Kobajasi Sigeki
|
RU2575009C2 |
| FINE POWDER OF MODIFIED POLYTETRAFLUOROETHYLENE AND METHOD OF ITS PRODUCTION, AND METHOD OF PRODUCING PIPE OR HOSE |
2016 |
- Kobayasi Sigeki
- Morgoven-Ene Ariana Klaudia
- Uejd Entoni Yudzhin
|
RU2722315C2 |
| METHOD FOR PRODUCING MODIFIED POLYTETRAFLUOROETHYLENE, METHOD FOR PRODUCING MODIFIED POLYTETRAFLUOROETHYLENE POWDER AND METHOD FOR PRODUCING STRETCHED POROUS MATERIAL |
2019 |
- Higuchi, Shinya
- Ebata, Shiro
- Kose, Takehiro
|
RU2803928C2 |
| FLUORINE-CONTAINING POLYMER WITH LOW RESIDUAL CONTENT OF FLUORINATED EMULSIFYING AGENT AND METHOD OF PRODUCING SAID POLYMER |
2006 |
- Matsuoka Jasukhiko
- Khiguti Sinia
- Khosikava Dzun
- Kamija Khiroki
|
RU2409592C2 |
| METHOD OF PRODUCTION OF PARAFFIN WAX FOR WATER-DISPERSIBLE POLYMERIZATION OF TETRAFLUOROETHYLENE AND METHOD OF PRODUCTION OF POLYTETRAFLUOROETHYLENE WITH THE USE OF THIS WAX |
2001 |
- Kobajasi Sigeki
- Khosikava Dzun
- Kato Kazuo
- Kamija Khiroki
- Khirai Khirojuki
|
RU2268895C2 |
