Grease composition
Abstract
A grease composition including(a) a thickener containing a mixture of the following formulas (I), (II), and (III):(I): R1-NHCONH—R2-NHCONH—R1,(II): R3-NHCONH—R2-NHCONH—R3, and(III): R1-NHCONH—R2-NHCONH—R3,where R1 is a cyclohexyl group, R2 is a C6-15 divalent aromatic hydrocarbon group, R3 is a C8-20 linear or branched alkyl group or alkenyl group, and {R1/(R1+R3)}×100 is 80 to 0 mol %, and(b) a base oil,wherein a 60-stroke worked penetration measured by a method specified in JIS K 2220.7 is 300 to 350, anda penetration in a roll stability test measured after applying shearing at 120° C. for 24 hours using a tester conforming to ASTM D 1831 is 440 or less.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A grease composition comprising
(a) a thickener containing a mixture of diurea compounds represented by the following formulas (I), (II), and (III): (I): R1-NHCONH—R2-NHCONH—R1, (II): R3-NHCONH—R2-NHCONH—R3, and (III): R1-NHCONH—R2-NHCONH—R3, where R1 is a cyclohexyl group, R2 is a C6-15 divalent aromatic hydrocarbon group, R3 is a C8-20 linear or branched alkyl group or alkenyl group, and a ratio of the number of moles of the cyclohexyl group to the total number of moles of the cyclohexyl group and the alkyl group or alkenyl group [{R1/(R1+R3)}×100] is 80 to 0 mol %, and (b) a base oil, wherein a 60-stroke worked penetration measured by a method specified in JIS K 2220.7 is 300 to 350, and a penetration in a roll stability test measured after applying shearing at 120° C. for 24 hours using a tester conforming to ASTM D 1831 is 440 or less.
2 . The grease composition according to claim 1 , wherein the diurea thickener exhibits a peak corresponding to the following formula (A) among peaks measured by X-ray diffraction:
[
Molecular
Cell
Size
of
Diurea
Thickener
Measured
by
X
-
ray
Diffraction
]
+
[
Molecular
Cell
Size
of
the
Diurea
Thickener
Obtained
by
Geometric
Calculation
]
=
0.7
to
0.4
.
(
A
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