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US 4,867,890 AGranted
Lubricating oil compositions containing ashless dispersant, zinc dihydrocarbyldithiophosphate, metal detergent and a copper compound
OwnerTerence Colclough, Frederick A. Gibson +1inventors
InventorsTerence Colclough, Frederick A. Gibson, John F. Marsh
Life of this patent
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Abstract
A lubricating oil composition having improved properties comprises a major proportion by weight of a lubricating oil, a dispersant compound, from 0.01 to 0.5 wt % phosphorus and zinc and 5 to 500 parts per million of copper, and additive concentrates for blending with oil to produce such lubricating oil compositions.
Claims82
A lubricating oil composition suitable as a crankcase lubricant in internal combustion engines comprising:
- A. a major amount of lubricating oil;
- B. a dispersing amount of lubricating oil dispersant selected from the group consisting of:
- (1) ashless nitrogen or ester containing dispersant compounds selected from the group consisting of:
- (a) oil soluble salts, amides, imides, oxazolines, esters, and mixtures thereof, of long chain hydrocarbon substituted mono- and dicarboxylic acids or their anhydrides;
- (b) long chain aliphatic hydrocarbons having a polyamine attached directly thereto;
- and
- (c) Mannich condensation products formed by condensing about a molar proportion of long chain hydrocarbon substituted phenol with from about 1 to 2.5 moles of formaldehyde and from about 0.5 to 2 moles of polyalkylene polyamine;
- wherein said long chain hydrocarbon group is a polymer of a C.sub.2 to C.sub.5 monoolefin, said polymer having a molecular weight of from about 700 to about 5000;
- (2) nitrogen or ester containing polymeric viscosity index improver dispersants which are selected from the group consisting of:
- (a) polymers comprised of C.sub.4 to C.sub.24 unsaturated esters of vinyl alcohol or of C.sub.3 to C.sub.10 unsaturated mono- or dicarboxylic acid with unsaturated nitrogen containing monomers having 4 to 20 carbons,
- (b) copolymers of C.sub.2 to C.sub.20 olefin with C.sub.3 to C.sub.10 mono- or dicarboxylic acid neutralized with amine, hydroxy amine or alcohols, and
- (c) polymers of ethylene with a C.sub.3 to C.sub.20 olefin further reacted either by grafting C.sub.4 to C.sub.20 unsaturated nitrogen containing monomers thereon or by grafting an unsaturated acid onto the polymer backbone and then reacting said carboxylic acid groups with amine, hydroxy amine or alcohol;
- and
- (3) mixtures of (1) and (2);
- wherein when said lubricating oil dispersant (1) is present, then said dispersing amount of (1) is about 1 to 10 wt. %, and when said lubricating oil dispersant (2) is present, then said dispersing amount of (2) is from about 0.3 to 10 wt. %;
- C. from about 0.01 to 5.0 parts by weight of oil soluble zinc dihydrocarbyl dithiophosphate wherein the hydrocarbyl groups contain from 1 to 18 carbon atoms;
- D. an antioxidant effective amount, within the range of from about 5 to about 500 parts per million by weight, of added copper in the form of an oil soluble copper compound;
- and
- E. a lubricating oil detergent additive which comprises at least one magnesium or calcium salt of a material selected from the group consisting of sulfonic acids, alkyl phenols, sulfurized alkyl phenols, alkyl salicylates and naphthenates, wherein said parts by weight are based upon 100 parts by weight of said lubricating composition and said weight % is based on the weight of said lubricating composition.
16 more elements
A lubricating crankcase motor oil composition for internal combustion engines comprises a major amount of lubricating oil;
- from 1 to 10 wt. % of an ashless nitrogen or ester containing dispersant compound formed by reacting alkenyl succinic acid or anhydride with a member selected from the group consisting of polyamine, amine alcohol, polyol and mixtures thereof, wherein said alkenyl group is a polymer of from 700 to 5000 molecular weight of C.sub.2 to C.sub.5 monoolefin;
- from 0.01 to 5.0 parts by weight of an oil soluble zinc dihydrocarbyl dithiophosphate wherein said hydrocarbyl groups contain from 1 to 18 carbons;
- an antioxidant effective amount, in the range of from about 5 to about 500 parts per million, of added copper in the form of an oil soluble copper compound;
- and a lubricating oil detergent additive which comprises at least one magnesium or calcium salt of a material selected from the group consisting of sulfonic acids, alkyl phenols, sulfurized alkyl phenols, alkyl salicylates, and naphthenates, wherein said parts by weight are based upon 100 parts by weight of said lubricating composition and said weight % is based on the weight of said lubricating composition.
1 more element
A lubricating oil composition suitable as a crankcase motor oil for internal combustion engines which comprises a major amount of mineral lubricating oil, from 1 to 10 wt. % of dispersant which comprises at least one of (1) polyisobutenyl succinic anhydride reacted with polyethyleneamine and (2) polyisobutenyl succinic anhydride reacted with polyethyleneamine and then borated;
- from 0.2 to 2 . 0 p arts by weight o f zinc dihydrocarbyl dithiophosphate wherein said hydrocarbyl groups are a mixture of alkyl groups of 4 and 5 carbon atoms;
- an antioxidant effective amount within the range of from about 60 to about 200 parts per million by weight of added copper in the form of an oil-soluble copper compound in said lubricating composition;
- and a detergent additive comprising at least one of an overbased magnesium sulfonate, an overbased calcium sulfonate, an overbased magnesium phenate and an overbased calcium phenate in an amount sufficient to provide from 500 to 5000 parts per million by weight of said magnesium or calcium, wherein said parts by weight are based upon 100 parts by weight of said lubricating composition and said weight % is based on the weight of said lubricating composition.
A lubricating oil concentrate composition suitable for use in preparing crankcase lubricants for internal combustion engines which comprises:
- A. lubricating oil;
- B. at least one lubricating oil dispersant selected from the group consisting of:
- (1) ashless nitrogen or ester containing dispersant compounds selected from the group consisting of:
- (a) oil soluble salts, amides, imides, oxazolines, esters, and mixtures thereof, of long chain hydrocarbon substituted mono- and dicarboxylic acids or their anhydrides;
- (b) long chain aliphatic hydrocarbons having a polyamine attached directly thereto;
- and
- (c) Mannich condensation products formed by condensing about a molar proportion of long chain hydrocarbon substituted phenol with from about to 2.5 moles of formaldehyde and about from 0.5 to 2 moles of polyalkylene polyamine;
- wherein said long chain hydrocarbon group is a polymer of a C.sub.2 to C.sub.5 monoolefin, said polymer having a molecular weight of from about 700 to about 5000;
- (2) nitrogen or ester containing polymeric viscosity improver dispersants which are selected from the group consisting of:
- (a) polymers comprised of C.sub.4 to C.sub.24 unsaturated of vinyl alcohol or of C.sub.3 to C.sub.10 unsaturated mono- or dicarboxylic acid with unsaturated nitrogen containing monomers having 4 to 20 carbons.
- (b) copolymers of C.sub.2 to C.sub.20 olefin with C.sub.3 to C.sub.10 mono- or dicarboxylic acid neutralized with amine, hydroxy amine or alcohols, and
- (c) polymers of ethylene with a C.sub.3 to C.sub.20 olefin fu reacted either by grafting C.sub.4 to C.sub.20 unsaturated nitrogen containing monomers thereon or by grafting an unsaturated acid onto the polymer backbone and then reacting said carboxylic acid groups with amine, hydroxy amine or alcohol;
- and
- (3) mixtures of (1) and (2);
- wherein when said lubricating oil dispersant (1) is present, then said dispersing amount of (1) is about 10 to 60 wt. %, and when said lubricating oil dispersant (2) is present, then said dispersing amount of (2) is from about 3 to 40 wt. %;
- C. oil soluble zinc dihydrocarbyl dithiophosphate wherein the hydrocarbyl groups contain from 1 to 18 carbon atoms and said dithiophosphate provides from 0.1 to 10.0 wt. % phosphorus and from 0.1 to 10.0 wt. % zinc;
- D. added copper, within the range of from 0.005 to 2 weight percent, in the form of an oil soluble copper compound;
- and
- E. a magnesium or calcium containing lubricating oil detergent additive which comprises at least one magnesium or calcium salt of a material selected from the group consisting of sulfonic acids, alkyl phenols, sulfurized alkyl phenols, alkyl salicylates, and naphthenates, wherein said parts by weight are based upon 100 parts by weight of said lubricating concentrate and said weight % is based on the weight of said lubricating concentrate.
16 more elements
Dependencies are inferred from the claim text.