Environmentally friendly lubricating grease for steel ropes
AssigneeKlueber Lubrication Muenchen SE & Co. KG
InventorsBrigitte Mayrhofer, Maximilian Erhard, Patrick Wittmeyer, Stefan Seemeyer
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Abstract
An environmentally acceptable lubricating grease, comprising: a) 50 wt % to 90 wt % of a biodegradable base oil comprising a biodegradable ester as base oil; b) 3 wt % to 25 wt % of a thickener selected from b1) 3 wt % to 12 wt % biodegradable calcium soap, b2) 3 wt % to 25 wt % bentonites, b3) and mixtures thereof; c) 4 wt % to 40 wt % additives, comprising c1) 1 wt % to 12 wt % fumed silicon dioxide and/or polytetrafluoroethylene and/or mixtures thereof, c2) 2 wt % to 45 wt % of a polymer selected from polyisobutylene, polyisobutylene/butene copolymer, polymethacrylates, polyesters and mixtures thereof, c3) 0.5 wt % to 20 wt % of a solid lubricant.
Claims20
An environmentally acceptable lubricating grease, comprising:
- a) 50 wt % to 90 wt % of a biodegradable base oil comprising a biodegradable ester as base oil,
- b) 3 wt % to 25 wt % of a thickener selected from
- b1) 3 wt % to 12 wt % biodegradable calcium soap,
- b2) 3 wt % to 25 wt % bentonites,
- b3) and mixtures thereof, and
- c) 4 wt % to 40 wt % additives, comprising
- c1) 1 wt % to 12 wt % fumed silicon dioxide and/or polytetrafluoroethylene and/or mixtures thereof,
- c2) 2 wt % to 45 wt % of a polymer selected from polyisobutylene, polyisobutylene/butene copolymer, polymethacrylates, polyesters and mixtures thereof,
- c3) 0.5 wt % to 20 wt % of a solid lubricant,
- wherein the lubricating grease and/or the ester a) has a thermal stability, determinable via TGA DIN 51006 of 150° C. to 200° C. and/or a volatility measured according to DIN 58397 of <10 wt % and/or a TAN Delta measured in accordance with DIN ASTM D-2619 with extended running time of 400 h of 0.0 mg KOH/g to 20 mg KOH/g and/or an acid content (TAN) of less than 5 mg KOH/g.
Dependencies are inferred from the claim text.