Grease compositions having improved performance
OwnerSarvesh K. Agrawalinventor
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Abstract
This disclosure relates to grease compositions having at least one base oil, at least one soap or non-soap thickener, and at least one elastomeric triblock copolymer of the general configuration A-B-A, in which A is a relatively hydrophobic polymer block and B is a relatively hydrophilic polymer block, and in which A forms less than 50% by weight of the total molecular weight of the elastomeric triblock copolymer. When the grease compositions are used under high shear conditions, structural stability and resistance to breaking down in accordance with ASTM D7342 is improved. When the grease compositions are used in low temperature conditions, low temperature starting and running torque in accordance with ASTM D1478 is improved.
Claims50
A grease composition comprising:
- at least one base oil;
- at least one non-soap thickener;
- and at least one elastomeric triblock copolymer of the general configuration A-B-A;
- wherein A is a relatively hydrophobic polymer block and B is a relatively hydrophilic polymer block;
- and wherein A forms less than 50% by weight of the total molecular weight of the elastomeric triblock copolymer.
A grease composition comprising:
- at least one base oil;
- at least one soap thickener;
- and at least one elastomeric triblock copolymer of the general configuration A-B-A;
- wherein A is a relatively hydrophobic polymer block and B is a relatively hydrophilic polymer block;
- and wherein A forms less than 50% by weight of the total molecular weight of the elastomeric triblock copolymer.
A method of preparing a grease composition comprising mixing at least one base oil, at least one non-soap thickener, and at least one elastomeric triblock copolymer of the general configuration A-B-A;
- wherein A is a relatively hydrophobic polymer block and B is a relatively hydrophilic polymer block;
- and wherein A forms less than 50% by weight of the total molecular weight of the elastomeric triblock copolymer.
A method of preparing a grease composition comprising mixing at least one base oil, at least one soap thickener, and at least one elastomeric triblock copolymer of the general configuration A-B-A;
- wherein A is a relatively hydrophobic polymer block and B is a relatively hydrophilic polymer block;
- and wherein A forms less than 50% by weight of the total molecular weight of the elastomeric triblock copolymer.
Dependencies are inferred from the claim text.