| 摘要 |
The present invention is directed at a grease composition comprising: A. an oil component having a major amount of a synthetic fluid having a viscosity of at least 50 cSt at 40 DEG C. and a minor amount of a mineral oil having a pour point below -20 DEG C.; and B. a thickener. The oil component of the grease composition preferably comprises between about 30 and 90 wt. % synthetic oil, more preferably between about 40 and about 80 wt. % synthetic oil and from 70 to 10 wt. % and preferably 60 to 20 wt. % mineral oil. The viscosity of the synthetic oil preferably is at least 50 cSt, more preferably at least 100 cSt at 40 DEG C. The synthetic oil preferably is selected from polyolefins, esters, polyesters, high VI isoparaffins, and mixtures thereof, with polyalphaolefins being particularly preferred. The polyalphaolefins preferably comprise C8 and C12 monoalphaolefin building blocks. |
