Polymeric viscosity index improver and oil composition comprisin

Details Polymeric viscosity index improver and oil composition comprisin Polymeric viscosity index improver and oil composition comprisin

1987-10-30

1988-11-29

Pal, Asok

Chemistry of hydrocarbon compounds

Product blend, e.g., composition, etc., or blending process...

Component of indefinite molecular weight greater than 150

585 7, 585 9, 585 12, 585 17, 585 18, C10M10700, C10M11902

Patent

active

047883618

ABSTRACT:
A triblock copolymer VI improver comprising terminal hydrogenated polyisoprene blocks and a central polymeric block containing predominantly monoalkenyl aromatic hydrocarbon monomer units. Oil compositions comprising such triblock copolymer VI improvers exhibit a good balance between thickening efficiency and mechanical shear stability combined with relatively high HTHSR viscosities.

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