Silicone functionalized viscosity index improver
AssigneeAfton Chemical Corporation
InventorsArturo Carranza, Kongsheng Yang, Ashutosh Gupta, Sheng Jiang
Life of this patent
Estimating the term…
Abstract
A multi-functional olefin copolymer viscosity index improver and a lubricating oil composition including such lubricant additive that provides improved viscometric properties and helps reduce low speed pre-ignition events at the same time. In one approach, the multi-functional olefin copolymer viscosity index improver is silicone functionalized and includes an acylated olefin copolymer with aminosilane or aminosiloxone pendant or side groups.
Claims20
A multi-functional olefin copolymer viscosity index improver comprising an acylated olefin copolymer with aminosilane or aminosiloxane pendant groups, the acylated olefin copolymer including an olefin copolymer backbone with grafted acylating moieties thereon linking the aminosilane or aminosiloxane pendant groups to the olefin copolymer backbone.
A lubricating oil composition comprising a major amount of a base oil and a minor amount of an acylated olefin copolymer viscosity index improver having aminosilane or aminosiloxane pendant groups, wherein the acylated olefin copolymer has an olefin copolymer backbone with grafted acyl moieties thereon linking the aminosilane or aminosiloxane pendant group to the olefin copolymer backbone, the acylated olefin copolymer viscosity index improver in an amount to provide about 5 to about 200 ppm of silicone to the lubricating oil composition.
Dependencies are inferred from the claim text.