JP2004224823A5 - - Google Patents

Claims (7)

A base oil having a kinematic viscosity at 40 ° C. of 20 to 50 mm ² / s is blended with a urea compound as a thickener in an amount of 8 to 30% by mass of the total amount of grease, and from carboxylic acid, carboxylate and ester-based rust inhibitor. At least one selected rust preventive additive is added in an amount of 0.1 to 10% by weight of the total amount of grease when added alone, and 0.1 to 15% by weight of the total amount of grease when added in total. The grease composition characterized by the above-mentioned.   The grease composition according to claim 1, wherein the rust preventive additive is at least one selected from naphthenate and succinic acid derivatives. Thickener is a compound represented by the following general formula (1) to (3) diurea compound represented by the _{[R 1} in moles / (number of moles + _{R 3} of _{R 1)]} is from 0.1 to 1.0 The grease composition according to claim 1, wherein the grease composition is a mixture mixed so that

(In the formula, R ₁ is a cyclohexyl group or an alkylcyclohexyl group having 7 to 12 carbon atoms, R ₂ is a divalent aromatic ring-containing hydrocarbon group having 6 to 15 carbon atoms, and R ₃ has 8 to 20 carbon atoms. The alkyl group of   The grease according to any one of claims 1 to 3, wherein at least one selected from an organic metal salt and an ashless dithiocarbamate is added in an amount of 0.1 to 10% by mass of the total amount of the grease. Composition. The grease composition according to claim 2 or 3, wherein the naphthenic acid salt is zinc naphthenate and the succinic acid derivative is a succinic acid ester . 6. The grease composition according to claim 5, which contains both zinc naphthenate and succinate. A rolling device in which the grease composition according to any one of claims 1 to 6 is enclosed.