| 摘要 |
Production method for multiple functional viscosity modifier useful in the mixtures of lubricating oils in the extruder reactor comprises: a) introducing the polymer soluble in the oil into the extruder reactor, b) reacting with the functional compound, c) purifying by transition through the de-aerating zone, where the polymer is subjected to the pressure below the atmospheric pressure, so that all vaporous impurities are distilled from the polymer, whilst the de-aerating zone contains at least two separated sections, d) reaction with the reactive compound, e) purification and f) extruding from the reactor. |
