Patent ID: 11873461
Assignee: AFTON CHEMICAL CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 9:
10. The sulfurized polyolefin oligomer of claim 1,
wherein the intermediate sulfurized olefin reaction product of step (a) is obtained by reacting about 0.4 to about 2 mols of the C2 to C18 olefin per about 0.3 to about 0.8 moles of the sulfur halide;
wherein the sulfurized polyolefin reaction product of step (b) is obtained by reacting about 0.2 to about 0.5 mols of sulfur per mol of the intermediate sulfurized olefin reaction product, about 0.7 to about 1.1 moles of the alkali metal hydroxide per mol of the intermediate sulfurized olefin reaction product, and a weight ratio of 0.01:1 to about 0.25:1 of sulfur to the alkali metal hydrosulfide sodium; and
wherein the sulfurized polyolefin oligomer of step (c) is obtained by treating the sulfurized polyolefin reaction product with about 10 to about 50 weight percent of the aqueous alkaline solution having about 40 to about 60 weight percent of an alkali metal hydroxide.