12-02-2015 дата публикации
Номер: US20150045273A1
A grease of the invention includes: a base oil containing hydrocarbon; and diurea that is represented by a formula (1) below as a thickener and is in a range from 15 mass % to 25 mass % based on a total amount of a composition, the grease exhibiting a worked penetration in a range from 170 to 295. 1. A grease comprising:a base oil comprising hydrocarbon; and {'br': None, 'sub': 1', '2', '3, 'RNHCONHRNHCONHR\u2003\u2003(1)'}, 'a diurea of formula (1) as a thickener in a range from 15 mass % to 25 mass % based on a total amount of the grease, the grease exhibiting a worked penetration in a range from 170 to 295,'}{'sub': 1', '3', '2, 'wherein Rand Rare mutually different and are each independently a hydrocarbon group having 6 to 18 carbon atoms; and Ris a divalent aromatic hydrocarbon group having 6 to 13 carbon atoms.'}2. The grease according to claim 1 , wherein the worked penetration is from 230 to 265.3. The grease according to claim 1 , wherein the hydrocarbon group is a saturated hydrocarbon group.4. The grease according to claim 3 , wherein the saturated hydrocarbon group is an alkyl group or a cycloalkyl group.5. The grease according to claim 4 , wherein the cycloalkyl group is a cyclohexyl group.6. The grease according to claim 4 , wherein Rand Rare each independently an octyl group or a cyclohexyl group.7. The grease according to claim 4 , wherein an average ratio of the cycloalkyl group in the diurea is from 15 mol % to 85 mol % based on a total amount of the alkyl group and the cycloalkyl group as functional groups.8. The grease according to claim 7 , wherein the average ratio of the cycloalkyl group is from 15 mol % to 50 mol %.9. The grease according to claim 7 , wherein the average ratio of the cycloalkyl group is from 75 mol % to 85 mol %.10. The grease according to claim 1 , wherein a content of the hydrocarbon is 90 mass % or more based on a total amount of the base oil.11. The grease according to claim 1 , wherein the hydrocarbon is a poly-α-olefin. ...
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