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US 12,187,975 B2Granted
Use of a lubricating grease composition having a high upper use temperature
AssigneeKlueber Lubrication Muenchen SE & Co. KG
InventorsChristof Schmitz, Wolfgang Tiepermann, Raphaela Makrutzki, Stefan Seemeyer
Life of this patent
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Abstract
A lubricant grease composition is disclosed, the lubricant grease composition including a base oil and a thickener. The thickener includes an aluminum-based complex soap and a polyurea thickener, wherein the lubricant grease is configured for lubrication of surfaces of components in which an upper use temperature of the lubricant grease composition is at least 90° C.
Claims10
A method of lubricating surfaces of plastic-containing friction partners, the method comprising:
- providing a lubricant grease composition having an upper use temperature of at least 90° C., the lubricant grease composition comprising:
- a base oil, wherein the base oil comprises one or more of polyalphaolefins, metallocene polyalphaolefins, and naphthenic mineral oils according to the API GroupI classification;
- and
- a thickener comprising an aluminum-based complex soap and a polyurea thickener;
- and
- lubricating the surfaces of plastic-containing friction partners or of a combination of metallic and plastic-containing friction partners;
- wherein the polyurea thickener is a reaction product of a diisocyanate selected from the group consisting of 2,4-diisocyanatotoluene, 2,6-diisocyanatotoluene, 4,4′-diisocyanatodiphenylmethane, 2,4′-diisocyanatophenyl-methane, 4,4′-diisocyanatodiphenyl, 4,4′-diisocyanato-3,3′-dimethylphenyl, 4,4′-diisocyanto-3,3′-dimethyl-phenylmethane, which may be used individually or in combination, with an amine of the general formula R′2-N—R, or a diamine of the general formula R′2-N—R—NR′2 where R is an aryl, alkyl or alkylene radical having 2 to 22 carbon atoms and R′ is identical or different and is a hydrogen or an alkyl, alkylene or aryl radical, or with mixtures of amines and diamines;
- wherein the aluminum-based complex soap has the formula (A)
- where R is an aliphatic hydrocarbyl radical having 4 to 28 carbon atoms;
- wherein R is derived from one or more fatty acids selected from the group consisting of lauric acid, palmitic acid, myristic acid, and stearic acid;
- wherein the base oil has a kinematic viscosity of 18 mm2/s to 20,000 mm2/s at 40° C.
- wherein a proportion of the polyurea thickener in the lubricant grease composition is 1% by weight to 11% by weight based on the total weight of the lubricant grease composition;
- and
- wherein a proportion of the aluminum-based complex soap in the lubricant grease composition is from 1% by weight to 11% by weight based on the total weight of the lubricant grease composition.
11 more elements
A method of lubricating surfaces of plastic-containing friction partners, the method comprising:
- providing a lubricant grease composition having an upper use temperature of at least intermittently at least 90° C., the lubricant grease composition comprising:
- a base oil, wherein the base oil comprises one or more of polyalphaolefins, metallocene polyalphaolefins, and naphthenic mineral oils according to the API Group I classification;
- and
- a thickener comprising an aluminum-based complex soap and a polyurea thickener;
- and
- lubricating the surfaces of plastic-containing friction partners or of a combination of metallic and plastic-containing friction partners
- wherein the polyurea thickener is a reaction product of a diisocyanate selected from the group consisting of 2,4-diisocyanatotoluene, 2,6-diisocyanatotoluene, 4,4′-diisocyanatodiphenylmethane, 2,4′-diisocyanatophenyl-methane, 4,4′-diisocyanatodiphenyl, 4,4′-diisocyanato-3,3′-dimethylphenyl, 4,4′-diisocyanto-3,3′-dimethyl-phenylmethane, which may be used individually or in combination, with an amine of the general formula R′2-N—R, or a diamine of the general formula R′2-N—R—NR′2 where R is an aryl, alkyl or alkylene radical having 2 to 22 carbon atoms and R′ is identical or different and is a hydrogen or an alkyl, alkylene or aryl radical, or with mixtures of amines and diamines;
- wherein the aluminum-based complex soap has the formula (A)
- where R is an aliphatic hydrocarbyl radical having 4 to 28 carbon atoms;
- wherein R is derived from one or more fatty acids selected from the group consisting of lauric acid, palmitic acid, myristic acid, and stearic acid;
- wherein the base oil has a kinematic viscosity of 18 mm2/s to 20,000 mm2/s at 40° C.
- wherein a proportion of the polyurea thickener in the lubricant grease composition is 1% by weight to 11% by weight based on the total weight of the lubricant grease composition;
- and
- wherein a proportion of the aluminum-based complex soap in the lubricant grease composition is from 1% by weight to 11% by weight based on the total weight of the lubricant grease composition.
11 more elements
Dependencies are inferred from the claim text.