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AssigneeNtn Corporation
InventorsMasakazu Hirata, Atsushi Morooka, Hidenobu Mikami, Toshiyuki Mizutani, Seiichi Takada, Masaaki Honda, Yoshihiko Oeda, Katsumi Nagano
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Disclosed is a lubricating composition such as a lubricant, a lubricating grease, or a rust preventive oil for use in a torque limiter and a ball-and-roller bearing; the lubricating composition having chemical attack resistance for a synthetic resin molded product. The lubricating composition comprises as a base oil at least one synthetic saturated hydrocarbon oil selected from the group consisting of a poly-α-olefin, and an ethylene-α-olefin copolymer. When a phosphoric acid ester is used as a compounding agent, or at lease one lubricating grease selected from the group consisting of an urea compound, silica powder, and bentonite powder is mixed therein, the lubricating composition is a rust preventive oil using a metal salt of sulfonic acid and the like. The lubricating composition is suitably used for machine parts of a business machine including the synthetic resin molded product.
A lubricating composition for use in a torque limiter, said lubricating composition having resistance to the chemical attack of a synthetic resin molded product, said composition consisting essentially of a base oil, and a compounding agent, wherein the base oil is a synthetic saturated hydrocarbon oil, wherein the compounding agent is at least one phosphoric acid ester selected from the group consisting of an aliphatic phosphoric acid ester and an aliphatic phosphorous acid ester, and wherein 1 to 8% by weight of the phosphoric acid ester is contained in the lubricating composition based on 100 parts by weight of the base oil.
A lubricating composition having chemical attack resistance for a synthetic resin molded product, comprising a lubricating grease comprising a perfluoro polyether oil as the base oil, and fluororesin powder as a thickener and at least one lubricating grease selected from the group consisting of two types of lubricating greases each having a different base oil;
A rust preventive oil having chemical attack resistance for a synthetic resin molded product, consisting essentially of a base oil, a rust preventive agent, and an antioxidant, wherein the base oil is at least one synthetic saturated hydrocarbon oil selected from the group consisting of a poly-α-olefin, and an ethylene-α-olefin copolymer, wherein the rust preventive agent is at least one metal salt selected from the group consisting of a metal salt of sulfonic acid, and a metal salt of a monocarboxylic acid, and wherein the antioxidant is a phenol based antioxidant.
Dependencies are inferred from the claim text.