Triblock copolymer concentrate for lubricating oil composition

摘要

Problem to be solved: to provide a polymer of a class suitable for use as a viscosity index improving agent or a viscosity adjuster for the lubricating oil composition.Solution: about 60 to about 95 parts (and at least 50% by weight) diluted oilHaving kv100 from about 2 CSEC to about 40 CST;And from about 5 to about 40 (and at least 6.0 mass%)Equation (1): a VM concentrate containing linear triblock copolymer characterized by D -- pa-d 'In the expressionD 'Represents a block derived from dieneThe PARepresents a block derived from a mono kenyl arenasD "Represents a block derived from dieneLinear triblock copolymerThe concentration of the concentrate is about 100 degrees Celsius in the effective viscosity to adjust the dynamic viscosity (kv100)Concentrate kv100About 3000 CST or lower.Linear triblock copolymers may have up to 0.5 thickening efficiency ranges.No selection