ADDITIVE FOR LUBRICATING OIL AND LUBRICATING OIL

    公开(公告)号:JPH07292377A

    公开(公告)日:1995-11-07

    申请号:JP10780694

    申请日:1994-04-22

    Abstract: PURPOSE:To obtain an additive for a lubricating oil suitable for a gear oil, etc., having excellent low-temperature viscosity characteristics, oxidation resistance characteristics and permanence, comprising a polymer containing a specific alkyl acrylate and a prescribed (meth)acrylic ester in a specific ratio. CONSTITUTION:This additive for a lubricating oil comprises (A) a polymer composed of (i) 80-99.5wt.% of a (-)10C alkyl group-containing alkyl acrylate and (ii) 0.5-20wt.% of a (meth)acrylic ester of an adduct of a saturated and/or an unsaturated aliphatic monohydric alcohol with an alkylene oxide and more preferably (B) a pour point depressing agent such as a chlorinated paraffin and/or a naphthalene condensate as constituent units. The weight ratio of the component A to the component B is preferably 80/20 to 99/1 and the additive for lubricating oil is added to a lubricating base oil such as a mineral oil having a high viscosity index containing a mineral oil or an isomerized paraffin to give the objective lubricating oil.

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