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US 2006/0069000 A1Published application
Stabilized lubricant compositions
AssigneeChemtura Corporation
InventorsJun Dong, Cyril Migdal
Life of this patent
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Abstract
A stabilized lubricant composition is disclosed that comprises lubricating oil and a mixture of (a) at least one organophosphite compound and (b) at least one aromatic secondary amine or one substituted phenol or mixtures thereof. The compositions have been found to be highly resistant to oxidation under demanding service conditions and to be useful as turbine lubricants.
Claims12
A stabilized lubricant composition for use in an environment where iron-catalyzed oxidation reactions can take place comprising:
- (A) at least one lubricating base oil;
- (B) at least one organophosphite compound selected from the group consisting of:
- (i) di-substituted phosphites of the structure:
- (ii) tri-substituted phosphites of the structure:
- (iii) substituted diphosphites of the structure:
- (iv) substituted diphosphites of the structure:
- (v) substituted triphosphites of the structure:
- (vi) pentaerythritol tetraphosphites of the structure:
- and (vii) trisubstitued thiophosphites of the structure:
- wherein R1 through R5, R10, R15, R16, and R22 through R24 are independently selected from the group consisting of hydrocarbyl groups having 1 to 100 carbon atoms, and R6 though R9, R11 through R14, and R17 through R21 are independently selected from the group consisting of hydrogen and hydrocarbyl groups having 1 to 100 carbon atoms, or any of R1 and R2, R3 and R4, R8 and R9, R11 and R12, R13 and R14, R17 and R18, R20 and R21, R22 and R23 can be fused together to form a ring of 2-10 carbon atoms, which can be further substituted with alkyl, alkenyl, cycloalkyl, aryl, or alkoxy groups;
- and
- (C) at least one antioxidant selected from the group consisting of secondary aromatic amines, substituted phenols, and mixtures thereof, represented by the following formulae
- wherein R25 and R26 are independently substituted or unsubstituted aryl groups having from 6 to about 40 carbon atoms;
- and
- wherein R27, R28 and R29 are independently hydrogen or hydrocarbyl groups having 1 to 100 carbon atoms, provided that at least one of the ortho position groups comprise alkyl.
12 more elements
A method for stabilizing lubricants against iron-catalyzed oxidation reactions comprising adding to the lubricant a stabilizing amount of a composition comprising:
- (A) at least one organophosphite compound selected from the group consisting of:
- (i) di-substituted phosphites of the structure:
- (ii) tri-substituted phosphites of the structure:
- (iii) substituted diphosphites of the structure:
- (iv) substituted diphosphites of the structure:
- (v) substituted triphosphites of the structure:
- (vi) pentaerythritol tetraphosphites of the structure:
- and (vii) trisubstitued thiophosphites of the structure:
- wherein R1 through R5, R10, R15, R16, and R22 through R24 are independently selected from the group consisting of hydrocarbyl group having 1 to 100 carbon atoms, and R6 though R9, R11 through R14, and R17 through R21 are independently selected from the group consisting of hydrogen and hydrocarbyl groups having 1 to 100 carbon atoms, or any of R1 and R2, R3 and R4, R8 and R9, R11 and R12, R13 and R14, R17 and R18, R20 and R21, R22 and R23 can be fused together to form a ring of 2-10 carbon atoms, which can be further substituted with alkyl, alkenyl, cycloalkyl, aryl, or alkoxy groups;
- and
- (C) at least one antioxidant selected from the group consisting of secondary aromatic amines, substituted phenols, and mixtures thereof, represented by the following formulae
- wherein R25 and R26 are independently substituted or unsubstituted aryl groups having from 6 to about 40 carbon atoms and
- wherein R27, R28 and R29 are independently hydrogen or hydrocarbyl groups having 1 to 100 carbon atoms, provided that at least one of the ortho position groups comprise alkyl.
10 more elements
A stabilized turbine oil composition comprising:
- (A) at least one lubricating base oil;
- (B) at least one organophosphite compound selected from the group consisting of:
- (i) di-substituted phosphites of the structure
- (ii) tri-substituted phosphites of the structure:
- (iii) substituted diphosphites of the structure:
- wherein R1 through R7 are independently selected from the group consisting of hydrocarbyl groups having 1 to 100 carbon atoms, and
- (C) at least one antioxidant selected from the group consisting of secondary aromatic amines, substituted phenols, and mixtures thereof, represented by the following formulae
- wherein R25 and R26 are independently substituted or unsubstituted aryl groups having from 6 to about 40 carbon atoms;
- and
- wherein R27, R28 and R29 are independently hydrogen or hydrocarbyl groups having 1 to 100 carbon atoms, provided that at least one of the ortho position groups comprise alkyl.
7 more elements
A method for stabilizing turbine lubricants comprising adding to the lubricant a stabilizing amount of a composition comprising:
- (A) at least one organophosphite compound selected from the group consisting of:
- (i) di-substituted phosphites of the structure:
- (ii) tri-substituted phosphites of the structure:
- (iii) substituted diphosphites of the structure:
- wherein R1 through R7 are independently selected from the group consisting of hydrocarbyl groups having 1 to 100 carbon atoms, and
- (B) at least one antioxidant selected from the group consisting of secondary aromatic amines, substituted phenols, and mixtures thereof, represented by the following formulae
- wherein R25 and R26 are independently substituted or unsubstituted aryl groups having from 6 to about 40 carbon atoms;
- and
- wherein R27, R28 and R29 are independently hydrogen or hydrocarbyl groups having 1 to 100 carbon atoms, provided that at least one of the ortho position groups comprise alkyl.
6 more elements
Dependencies are inferred from the claim text.