| 摘要 |
<p>The invention relates to a viscosity modifier additive for the formulation of multigrade oils. According to the invention, the additive is prepared by the controlled mechanical and chemical degradation of a copolymer consisting of 26...79% by weight ethylene, 20...73% by weight alpha-olefinic (C3...C28) monomer and 1...5% by weight norbornenic alkyl monomer, in the presence of 0.005...3%, preferably 0.05...0.5%, degradation initiating agent of the dicumyl peroxide type, 0.08...0.01% degradation accelerating agent of the cobalt acetylacetonate type, 0.08...0.01% decomposition activators of organic initiating agents of the maleic anhydride type, after which the degradation product is stabilized with 0.1...0.4% usual oxidation-proof stabilizers and is dissolved in 12% mineral oil.</p> |
