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US 5,356,552 AGranted
Chlorine-free lubricating oils having modified high molecular weight succinimides
AssigneeChevron Research and Technology Company, a Division of Chevron U.S.A. Inc.
InventorsJames J. Harrison, William R. Ruhe, Jr., Jack E. Morris, Jacques Cazin
Life of this patent
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Abstract
Alkenyl or alkyl succinimide additives which are the reaction product of a high molecular weight alkenyl- or alkyl-substituted succinic anhydride and a polyalkylene polyamine having an average of greater than 4 nitrogen atoms per mole, wherein the reaction product is post-treated with a cyclic carbonate, are compatible with fluoroelastomer engine seals and, for concentration levels at which fluoroelastomer seal compatibility is achieved, possess improved dispersancy and/or detergency properties when employed in chlorine-free lubricating oils.
Claims74
A lubricating oil composition that is essentially free of chlorine, said lubricating oil composition comprising:
- (a) a major proportion of an oil of lubricating viscosity;
- and
- (b) a minor amount of a polyamino alkenyl or alkyl succinimide sufficient to be compatible with fluoroelastomer seals and simultaneously control engine deposits, wherein the succinimide comprises the reaction product of:
- (i) an alkenyl- or alkyl-substituted succinic anhydride derived from a polyolefin having a Mn of from 2000 to 2700 and a Mw/Mn ratio of from 1 to 5;
- and
- (ii) a polyalkylene polyamine having an average nitrogen atom to molecule ratio of greater than 4.0;
- wherein the reaction product is post-treated with a cyclic carbonate;
- and
- wherein the level of chlorine in the composition is less than 50 ppm.
6 more elements
A lubricating oil composition that is essentially free of chlorine, said lubricating oil composition comprising:
- (a) a major proportion of an oil of lubricating viscosity;
- and
- (b) a minor amount of a polyamino alkenyl or alkyl succinimide sufficient to be compatible with fluoroelastomer seals and simultaneously control engine deposits, wherein the amount of the succinimide is less than about 3 weight percent on a dry polymer basis, and wherein the succinimide comprises the reaction product of:
- (i) an alkenyl- or alkyl-substituted succinic anhydride derived from a polyisobutene having a Mn of about 2200 and a Mw/Mn ratio of from 1 to 5, wherein the anhydride has a succinic ratio from 1 to 1.7;
- and
- (ii) a polyalkylene polyamine having an average nitrogen atom to molecule ratio of greater than 4.0;
- wherein the charge mole ratio of polyamine to succinic anhydride is from 0.4:1 to 0.5:1;
- wherein the reaction product is post-treated with ethylene carbonate at a charge mole ratio of ethylene carbonate to basic amine nitrogen in the succinimide reaction product of from 2:1 to 3:1;
- and
- wherein the level of chlorine in the composition is less than 50 ppm.
7 more elements
A lubricating oil concentrate that is essentially free of chlorine, said lubricating oil concentrate comprising
- (a) from about 90 to about 10 weight percent of an oil of lubricating viscosity;
- and
- (b) from about 10 to about 90 weight percent on an oil-free basis of a polyamino alkenyl or alkyl succinimide, wherein the succinimide comprises the reaction product of:
- (i) an alkenyl- or alkyl-substituted succinic anhydride derived from a polyolefin having a Mn of from 2000 to 2700 and a Mw/Mn ratio from 1 to 5;
- and
- (ii) a polyalkylene polyamine having an average nitrogen atom to molecule ratio of greater than 4.0;
- wherein the reaction product is post-treated with a cyclic carbonate;
- and
- wherein the level of chlorine in the concentrate is less than 50 ppm.
6 more elements
A lubricating composition that is essentially free of chlorine, said lubricating oil composition comprising:
- (a) a major proportion of an oil of lubricating viscosity;
- (b) a minor amount of a polyamino alkenyl or alkyl succinimide sufficient to be compatible with fluoroelastomer seals and simultaneously control engine deposits, wherein the succinimide comprises the reaction product of:
- (i) an alkenyl- or alkyl-substituted succinic anhydride derived from a polyolefin having a Mn of from 2000 to 2700 and a Mw/Mn ratio of from 1 to 5;
- and
- (ii) a polyalkylene polyamine having an average nitrogen atom to molecule ratio of greater than 4.0;
- wherein the reaction product is post-treated with a cyclic carbonate;
- and
- (c) a minor amount of a succinate ester of substantially saturated polymerized olefin-substituted succinic acid and aliphatic polyhydric alcohol;
- and
- wherein the level of chlorine in the composition is less than 50 ppm.
7 more elements
A lubricating oil composition that is essentially free of chlorine, said lubricating composition comprising:
- (a) a major proportion of an oil of lubricating viscosity;
- (b) a minor amount of a polyamino alkenyl or alkyl succinimide sufficient to be compatible with fluoroelastomer seals and simultaneously control engine deposits, wherein the amount of the succinimide is less than about 3 weight percent on an oil-free basis, and wherein the succinimide comprises the reaction product of:
- (i) an alkenyl- or alkyl-substituted succinic anhydride derived from a polyisobutene having a Mn of about 2200 and a Mw/Mn ratio of from 1 to 5, wherein the anhydride has a succinic ratio from 1 to 1.7;
- and
- (ii) a polyalkylene polyamine having an average nitrogen atom to 1 molecule ratio of greater than 4.0;
- wherein the charge mole ratio of polyamine to succinic anhydride is from 0.4:1 to 0.5:1;
- wherein the reaction product is post-treated with ethylene carbonate at a charge mole ratio of ethylene carbonate to basic amine nitrogen in the succinimide reaction product of from 2:1 to 3:1;
- and
- (c) a minor amount of a succinate ester of polyisobutene-substituted succinic acid and aliphatic alcohol selected from the group consisting of glycerol, pentaerythritol, and sorbitol;
- wherein the polymerized isobutene has a Mn of from 850 to 1200;
- and
- wherein the level of chlorine in the composition is less than 50 ppm.
9 more elements
A lubricating oil concentrate that is essentially free of chlorine, said lubricating oil concentrate comprising
- (a) from about 90 to about 10 weight percent of an oil of lubricating viscosity;
- and
- (b) from about 10 to about 90 weight percent on an oil-free basis of an additive mixture comprising:
- (i) a polyamino alkenyl or alkyl succinimide, wherein the succinimide comprises the reaction product of:
- (1) an alkenyl- or alkyl-substituted succinic anhydride derived from a polyolefin having a Mn of from 2000 to 2700 and a Mw/Mn ratio from 1 to 5;
- and
- (2) a polyalkylene polyamine having an average nitrogen atom to molecule ratio of greater than 4.0;
- wherein the reaction product is post-treated with a cyclic carbonate;
- and
- (ii) a succinate ester of polyisobutene-substituted succinic acid and aliphatic alcohol selected from the group consisting of glycerol, pentaerythritol, and sorbitol;
- and
- wherein the level of chlorine in the concentrate is less than 50 ppm.
9 more elements
A lubricating composition that is essentially free of chlorine, said lubricating oil composition comprising:
- (a) a major proportion of an oil of lubricating viscosity;
- (b) a minor amount of a polyamino alkenyl or alkyl succinimide in the range of from 1 to 8 wt % sufficient to be compatible with fluoroelastomer seals and simultaneously control engine deposits, wherein the succinimide comprises the reaction product of:
- (i) an alkenyl- or alkyl-substituted succinic anhydride derived from a polyolefin having a Mn of from 2700 to 2700 and a Mw/Mn ratio of from 1 to 5;
- and
- (ii) a polyalkylene polyamine having an average nitrogen atom to molecule ratio of greater than 4.0;
- wherein the reaction product is post-treated with a cyclic carbonate;
- (c) a minor amount less than 6 wt % of a succinate ester of substantially saturated polymerized olefin-substituted succinic acid and aliphatic polyhydric alcohols;
- (d) a minor amount of at least one detergent selected from the group consisting of metal sulfonates, metal alkyl phenates, metal salciylates, and mixtures thereof;
- and
- (e) a minor amount of zinc dialkyldithiophosphate;
- and
- wherein the level of chlorine in the composition is less than 50 ppm.
9 more elements
A lubricating oil composition that is essentially free of chlorine, said lubricating composition comprising:
- (a) a major proportion of an oil of lubricating viscosity;
- (b) a minor amount of a polyamino alkenyl or alkyl succinimide in the range of from 1 to 8 wt % sufficient to be compatible with fluoroelastomer seals and simultaneously control engine deposits, wherein the amount of the succinimide is less than about 3 weight percent on an oil-free basis, and wherein the succinimide comprises the reaction product of:
- (i) an alkenyl- or alkyl-substituted succinic anhydride derived from a polyisobutene having a Mn of about 2200 and a Mw/Mn ratio of from 1 to 5, wherein the anhydride has a succinic ratio from 1 to 1.7;
- and
- (ii) a polyalkylene polyamine having an average nitrogen atom to molecule ratio of greater than 4.0;
- wherein the charge mole ratio of polyamine to succinic anhydride is from 0.4:1 to 0.5:1;
- wherein the reaction product is post-treated with ethylene carbonate at a charge mole ratio of ethylene carbonate to basic amine nitrogen in the succinimide reaction product of from 2:1 to 3:1;
- (c) a minor amount less than 6 wt % of a succinate ester of polyisobutene-substituted succinic acid and aliphatic alcohol selected from the group consisting of glycerol, pentaerythritol, and sorbitol;
- (d) from 1 to 15 millimoles of a low overbased metal sulfonate;
- (e) from 10 to 25 millimoles of a highly overbased magnesium sulfonate;
- (f) from 35 to 65 millimoles of a carbonated sulfurized metal alkylphenate;
- and
- (g) from 10 to 20 millimoles of zinc dialkyldithiophosphate derived from secondary alcohols;
- and
- wherein the level of chlorine in the composition is less than 50 ppm.
12 more elements
A lubricating oil concentrate that is essentially free of chlorine, said lubricating oil concentrate comprising
- (a) from about 90 to about 10 weight percent of an oil of lubricating viscosity;
- and
- (b) from about 10 to about 90 weight percent on an oil-free basis of a mixture of:
- (i) a polyamino alkenyl or alkyl succinimide, wherein the succinimide comprises reaction product of:
- (1) an alkenyl- or alkyl-substituted succinic anhydride derived from a polyolefin having a Mn of from 2700 to 2700 and a Mw/Mn ratio from 1 to 5;
- and
- (2) a polyalkylene polyamine having an average nitrogen atom to molecule ratio of greater than 4.0;
- wherein the reaction product is post-treated with a cyclic carbonate;
- (ii) a succinate ester of polyisobutene-substituted succinic acid and aliphatic alcohol selected from the group consisting of glycerol, pentaerythritol, and sorbitol, wherein the succinate ester is essentially free of chlorine;
- (iii) a minor amount of a low overbased metal sulfonate;
- (iv) a minor amount of a highly overbased magnesium sulfonate;
- (v) a minor amount of a carbonated sulfurized metal alkylphenate;
- and
- (vi) a minor amount of zinc dialkyldithiophosphate derived from secondary alcohols;
- and
- wherein the level of chlorine in the concentrate is less than 50 ppm.
13 more elements
Dependencies are inferred from the claim text.