| abstract |
The invention belongs to lubricating oil field, more particularly to a kind of lubricating oil viscosity-temperature improver.The preparation method of the present invention：Solvent hexane is added in polymerization container, add to 10~50 DEG C, ethene is continuously passed through into reactor, propylene, styrene and hydrogen, hydrogen, ethene, propylene, the mol ratio of styrene is 0.1~0.3: 0.45~1: 1: 0.8~1, stirring reaction 1~3 hour, add major catalyst benzoyl peroxide and co-catalyst triethyl aluminum, the addition of major catalyst is 0.01~1% (weight) of solvent adding amount, the amount of co-catalyst is 2~10 times of main catalyst weight, reaction stops stirring after terminating, methanol is added to be terminated, washed with aqueous slkali, vacuum drying obtains product ethylene acrylonitrile-styrol copolymer.The overall targets such as the viscosity-temperature characteristics of lubricating oil, thickening ability, cryogenic property, dispersiveness can be changed, be all significantly better than current like product. |