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US 4,938,880 AGranted
Process for preparing stable oleaginous compositions
AssigneeExxon Chemical Patents Inc.
InventorsMalcolm Waddoups, Barry J. Howlett
Life of this patent
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Abstract
According to the present invention, oleaginous compositions having improved stability are provided, wherein high molecular weight ashless dispersants and metal detergents are pre-blended at a temperature of at least 100.degree. C. for a period of from 1 to 10 hours, cooled to at least 85.degree. C. and admixed with additional additives, including oil soluble copper antioxidants and zinc dialkyl dithiophosphate antiwear agents.
Claims67
A process for producing dispersant-detergent compositions of improved haze-resistance, said compositions being useful as additives for oleaginous compositions which comprises:
- (a) contacting a mixture comprising lubricating oil, ashless dispersant and metal detergent at a temperature of at least about 100.degree. C. for a time of from about 1 to 10 hours to form a heat-treated mixture;
- (b) cooling said heat-treated mixture to a temperature of not greater than about 85.degree. C. to form a cooled heat-treated mixture;
- (c) admixing said cooled heat-treated mixture with at least one member selected from the group consisting of copper antioxidant additives and zinc dialkyl dithiophosphate anti-wear additives to form an additive package of improved haze-resistance properties;
- said ashless dispersant comprising a nitrogen or ester containing dispersant selected from the group consisting of (i) oil soluble salts, amides, imides, oxazolines and esters, or mixtures thereof, of long chain hydrocarbon substituted mono and dicarboxylic acids or their anhydrides;
- (ii) long chain aliphatic hydrocarbon having a polyamine attached directly thereto;
- and (iii) Mannich condensation products formed by condensing about a molar proportion of a long chain hydrocarbon substituted phenol with about 1 to 2.5 moles of formaldehyde and about 0.5 to 2 moles of polyalkylene polyamine;
- wherein said long chain hydrocarbon group in (i), (ii) and (iii) is a polymer of a C.sub.2 to C.sub.10 monoolefin, said polymer having a number average molecular weight of at least about 1300.
4 more elements
A process for producing dispersant-detergent compositions of improved haze-resistance, said compositions being useful as additives for oleaginous compositions which comprises:
- (a) contacting a mixture comprising lubricating oil, ashless dispersant and metal detergent at a temperature of at least about 100.degree. C. to 160.degree. C. for a time of from about 1 to 10 hours to form a heat-treated mixture;
- (b) cooling said heat-treated mixture to a temperature of not greater than about 85.degree. C. to form a cooled heat-treated mixture;
- (c) admixing said cooled heat-treated mixture with at least one member selected from the group consisting of copper antioxidant additives and zinc dialkyl dithiophosphate anti-wear additive to form an additive package of improved haze-resistance properties;
- said ashless dispersant comprising the oil soluble reaction product of a reaction mixture comprising:
- (i) a hydrocarbyl sustituted C.sub.4 to C.sub.10 monounsaturated dicarboxylic acid producing material formed by reacting olefin polymer of C.sub.2 to C.sub.10 monoolefin having a number average molecular weight of at least about 1300 and a C.sub.4 to C.sub.10 monounsaturated acid material, said acid producing material having an average of at least about 0.8 dicarboxylic acid producing moieties per molecule of said olefin polymer present in the reaction mixture used to form said acid producing material;
- and (ii) a nucleophilic reactant selected from the group consisting of amine, alcohol, amino alcohol and mixtures thereof;
- and said metal detergent comprises at least one member selected from the group consisting of neutral and overbased alkali and alkaline earth metal sulfonates, and neutral and overbased alkali and alkaline earth metal phenates.
4 more elements
A process for producing dispersant-detergent compositions of improved haze-resistance, said compositions being useful as additives for oleaginous compositions which comprises:
- (a) contacting a mixture comprising lubricating oil, ashless dispersant and metal detergent at a temperature of at least about 100.degree. C. for a time of from about 1 to 10 hours to form a heat-treated mixture;
- (b) cooling said heat-treated mixture to a temperature of not greater than about 85.degree. C. to form a cooled heat-treated mixture;
- (c) admixing said cooled heat-treated mixture with at least one member selected from the group consisting of copper antioxidant additives and zinc dialkyl dithiophosphate anti-wear additives to form an additive package of improved haze-resistance properties;
- said ashless dispersant comprising the oil soluble reaction product of a reaction mixture comprising:
- (a) a hydrocarbyl substituted C.sub.4 to C.sub.10 monounsaturated dicarboxylic acid producing material formed by reacting olefin polymer of C.sub.2 to C.sub.10 monoolefin having a number average molecular weight (M.sub.n) of from about 1,500 to 3,000 and a C.sub.4 to C.sub.10 monounsaturated acid material, said acid producing material having an average of at least about 0.8 dicarboxylic acid producing moieties per molecule of said olefin polymer present in the reaction mixture used to form said acid producing material;
- and
- (b) a nucleophilic reactant selected from the group consisting of amine, alcohol, amino alcohol and mixtures thereof.
4 more elements
Dependencies are inferred from the claim text.