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What is viscosity index improver?

April 26, 2017improver index viscosity

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What is viscosity index improver?

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Viscosity index improver is an oil-soluble high molecular organic polymer. Viscosity index improver is added into relatively low viscosity neutral oil so that the viscosity of the lubricants can be notably increased and the viscosity-temperature property can be improved. This can satisfy the requirement of the oil products used in a wide temperature range. The viscosity index improver commonly used includes polyisobutylene, polymethylacrylate and ethylene propylene copolymer.