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Citation: Zhao Xingfa, Yang Dezheng, Zhou Yishou, Din Hongan, Zhang Li, Chen Xiuhua, Xu Yun, Liao Shijian, Guo Hefu. A VISCOSITY INDEX IMPROVER FOR LUBRICATING OIL FROM ETHYLENE-PROPYLENE COPOLYMER[J]. Chinese Journal of Applied Chemistry, ;1984, 1(3): 41-46. shu

A VISCOSITY INDEX IMPROVER FOR LUBRICATING OIL FROM ETHYLENE-PROPYLENE COPOLYMER

1.
1. Institute of Dalian No. 7 Petroleum Refinery;
2.
2. Dalian Institute of Chemical Physics, Academia Sinica

Received Date: 26 January 1984
Available Online: 11 April 1984

A highly active supported catalyst (TiCl₄-PCl₃)/MgC1₂-AlEt₃ for ethylene-propylene copolymerization is reported. Ethylene-propylene copolymer with low molecular weight and narrow molecular weight distribution has been obtained through the addition of PCl₃ ligand in the catalyst system and the hydrogen regulation in the course of reaction. The copolymer is sui-table for viscosity index improver for lubricating oil, having rather good overall properties in respect of viscosity index, thickness, low temperature viscosity, and stabilities against shearing, oxidation. heat etc..
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