Process oil, process for producing the same and rubber composition
AssigneeIdemitsu Kosan Co., Ltd.
InventorsMasami Takasaki, Meishi Tanaka, Hisao Anzai, Masashi Nakamura, Chisato Endo
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Abstract
A process oil which satisfies the requirements of (a) a content of a polycyclic aromatic compound of less than 3% by weight, (b) a content of an aromatic hydrocarbon of 18% by weight or more, (c) a content of a polar compound ranging from 11 to 25% by weight, (d) a kinematic viscosity at 100° C. ranging from 10 to 70 mm2/s, and (e) a flash point of 210° C. or more.
Claims5
A process for producing process oil having a content of a polycyclic aromatic compound of less than 3% by weight, which comprises extracting mixed oil made of 20 to 90% by volume of residual oil and 10 to 80% by volume of lubricant base oil with a polar solvent.
Dependencies are inferred from the claim text.