The present invention relates to a grease composition and a method of improving the adhesivity of a grease composition, the grease composition including (i) at least one base oil, (ii) at least one calcium sulfonate soap, and (iii) at least one dicarboxylic acid ester copolymer including constituent units derived from (a) at least one-α-olefin and (b) at least one ester formed by esterification of an α-β-ethylenically unsaturated dicarboxylic acid or a derivative thereof with an alcohol, the molar ratio of (a)/(b) ranging from 0.5 and to 4.

The present invention relates to a grease composition and a method of improving the adhesivity of a grease composition, the grease composition including (i) at least one base oil, (ii) at least one calcium sulfonate soap, and (iii) at least one dicarboxylic acid ester copolymer including constituent units derived from (a) at least one-α-olefin and (b) at least one ester formed by esterification of an α-β-ethylenically unsaturated dicarboxylic acid or a derivative thereof with an alcohol, the molar ratio of (a)/(b) ranging from 0.5 and to 4.

A bearing flushing composition includes a grease component and a solvent component. The grease component may include a grease thickener component, a base oil component, and, optionally, a performance additive component. The solvent component may include one or more solvent agents blended with the grease component.

A bearing flushing composition includes a grease component and a solvent component. The grease component may include a grease thickener component, a base oil component, and, optionally, a performance additive component. The solvent component may include one or more solvent agents blended with the grease component.

This disclosure relates to grease compositions having at least one base oil, and at least one thickener. The at least one thickener includes a combination of calcium sulfonate and a polyurea. The grease compositions have a service life or time at which 50 percent of the bearings fail (L50) of at least 100 hours at a temperature of 160 C., in accordance with DIN 51821 (FAG FE9). The calcium sulfonate includes from 60 weight percent to 95 weight percent, based on the total weight of the thickener, and the polyurea comprises from 5 weight percent to 40 weight percent, based on the total weight of the thickener. This disclosure also relates to a method of preparing the grease compositions. This disclosure further relates to a method for improving high temperature performance of a grease composition in a mechanical component lubricated with the grease composition.

This disclosure relates to grease compositions having at least one base oil, and at least one thickener. The at least one thickener includes a combination of calcium sulfonate and a polyurea. The grease compositions have a service life or time at which 50 percent of the bearings fail (L50) of at least 100 hours at a temperature of 160 C., in accordance with DIN 51821 (FAG FE9). The calcium sulfonate includes from 60 weight percent to 95 weight percent, based on the total weight of the thickener, and the polyurea comprises from 5 weight percent to 40 weight percent, based on the total weight of the thickener. This disclosure also relates to a method of preparing the grease compositions. This disclosure further relates to a method for improving high temperature performance of a grease composition in a mechanical component lubricated with the grease composition.

The invention discloses a lubricating grease with thixotropy and a preparation method thereof. The lubricating grease comprises a polyurea/high base number calcium sulfonate composite thickener, colloidally dispersed calcium carbonate solid particles in the form of calcite, a calcium borate or calcium borate composite, and a calcium soap of fatty acid having 12 to 24 carbon atoms. The above components are uniformly dispersed in an oil phase medium. The content of high base number calcium sulfonate in the lubricating grease is less than 22 wt %, and the lubricating grease has a worked cone penetration of 295 or less.

The invention discloses a lubricating grease with thixotropy and a preparation method thereof. The lubricating grease comprises a polyurea/high base number calcium sulfonate composite thickener, colloidally dispersed calcium carbonate solid particles in the form of calcite, a calcium borate or calcium borate composite, and a calcium soap of fatty acid having 12 to 24 carbon atoms. The above components are uniformly dispersed in an oil phase medium. The content of high base number calcium sulfonate in the lubricating grease is less than 22 wt %, and the lubricating grease has a worked cone penetration of 295 or less.

A sulfonate-based grease composition and method of manufacture comprising (1) addition of both overbased calcium sulfonate and overbased magnesium sulfonate in a ratio range of 60:40 to 100:1, with the magnesium sulfonate added all at once, a portion prior to conversion and another portion after conversion, and/or one more delay periods between the addition of water or other reactive ingredient and the addition of magnesium sulfonate; (2) one or more delay periods between the addition of at least a portion of a facilitating acid and at least a portion of the next subsequently added ingredient; (3) no conventional non-aqueous converting agents added prior to conversion; or (4) a combination thereof. The grease has a high dropping point and reduced thickener yield.

A sulfonate-based grease composition and method of manufacture comprising (1) addition of both overbased calcium sulfonate and overbased magnesium sulfonate in a ratio range of 60:40 to 100:1, with the magnesium sulfonate added all at once, a portion prior to conversion and another portion after conversion, and/or one more delay periods between the addition of water or other reactive ingredient and the addition of magnesium sulfonate; (2) one or more delay periods between the addition of at least a portion of a facilitating acid and at least a portion of the next subsequently added ingredient; (3) no conventional non-aqueous converting agents added prior to conversion; or (4) a combination thereof. The grease has a high dropping point and reduced thickener yield.