| abstract |
Fluorinated greases comprising (by weight): 15%-50% polytetrafluoroethylene or tetrafluoroethylene copolymers with other ethylenically unsaturated monomers; 30%-84.5% perfluoropolyether oil having a viscosity comprised between 20 and 4000 cSt at 20 DEG C.; 0.5%-10% surfactant or dispersant having perfluoropolyether or perfluoroalkylic chain; 0%-10% of an anticorrosion and/or antiwear additive, such that the (per)fluoropolymer particles based on TFE or their aggregates have average sizes lower than the micron and show improved diameter WEAR values. |