JP2009074059A - Release additive composition for oil filter system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a sustained release liquid additive concentrate for an engine oil filter. <P>SOLUTION: The additive concentrate containing at least one detergent and at least one antioxidant is provided. The tanδ of the additive concentrate is about 5 or greater. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present disclosure is directed to a release additive concentrate and its use within an oil filter system. More specifically, the present disclosure is directed to a method of extending the oil drain spacing of an engine with an oil filter comprising a release additive containing at least one detergent and at least one antioxidant. And

  Mineral and organic acid by-products are produced during the combustion process of internal combustion engines. At the same time, other acidic substances may be produced by the decomposition of lubricants used in internal combustion engines. Such by-products cause high temperature deposit formation, low temperature sludge formation, and corrosion of various engine parts, ultimately leading to increased wear of the lubricated engine components. In order to break the cycle of sludge formation, high temperature deposit formation, and accelerated wear of engine parts, lubricants typically include a basic material to neutralize the acidic material of interest.

  However, the basic retention capability of the lubricant composition throughout its useful life is a problem. Failure to maintain oil basicity dramatically increases car downtime and dramatically reduces engine life, such as requiring more frequent oil changes than recommended oil change intervals There are things to do.

  Therefore, if the basicity of the lubricant composition can be maintained over a long period of time, for example, sludge formation, high temperature deposit formation, and the possibility of corrosion will be dramatically reduced, and maintenance time will be reduced. Life can be extended.

  In view of the foregoing, based on exemplary embodiments of the present disclosure, a sustained release liquid additive concentrate for an engine oil filter and a method for extending the oil drain spacing of an engine are provided. The additive concentrate includes at least one detergent and at least one antioxidant. The tangent delta of the additive concentrate is about 5 or more.

  In another exemplary embodiment, a method for extending the spacing of an automobile oil drain is disclosed. This method involves installing an oil filter on the vehicle containing a release additive liquid that is released into the engine oil at regular intervals. The release additive solution includes at least one detergent and at least one antioxidant, and the release additive solution has a tangent delta of about 5 or more.

  An advantage of the disclosed additives and methods is that the engine oil drain spacing is dramatically extended without requiring specific processing conditions for the additive concentrate. In other words, a liquid additive concentrate rather than a solid or anti-solid is advantageously used to control release of the additive through the oil filter to the lubricating oil system. Other objects and advantages of the present disclosure can be understood by the following partial description and / or by performing the present disclosure. The objects and advantages of the disclosure will be realized and attained by means of the elements and combinations particularly pointed out in the appended claims.

  Both the foregoing summary and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure as claimed.

For the purposes of this disclosure, the “tangent delta” of a fluid is the rheological property of the fluid and is defined as the ratio of fluid loss to storage as measured by the fluid's small amplitude oscillatory shear test. . Accordingly, the additive concentrate is substantially liquid and has a tangent delta of about 5 or more.

Description of exemplary embodiments

  In accordance with the present disclosure, vehicle maintenance reduces the non-basic / acidic oil in the engine by using a liquid additive concentrate that is added to the oil through a filter, thereby reducing the likelihood of corrosion. At least one of the following characteristics can be achieved, such as reducing the time of the engine and extending the life of the engine. Furthermore, the basicity of the lubricating composition is maintained or increased by contacting the oil with a predetermined amount of additive concentrate. Without being limited to any particular theory, the detergent in the additive concentrate is slowly released into the lubricating composition, thereby maintaining and / or increasing the TBN of the lubricating composition throughout the life of the lubricating composition. Thus, it is believed that at least one of the properties disclosed above is achieved by using the disclosed additive concentrate. The TBN of the cleaning agent is suitably at least about 100. For those having ordinary skill in the art, the life of the lubricating composition includes engine operation, engine type, engine service, car mileage, quality of basic oil in the lubricating composition, etc. It is understood that it is based on several factors, not limited to:

Engines that benefit from the use of additive concentrates include internal combustion engines, stationary engines, generators, diesel and / or gasoline engines, high speed engines and / or off-highway engines, two-cycle engines, aero engines, Examples include, but are not limited to, piston engines, marine engines, railway engines, biodegradable fuel engines, and others. In one embodiment, to the engine exhaust gas recirculation device, catalytic converters, diesel particulate filters, the post-processing apparatus such as NO _x trap is equipped.

  As used herein, the term “release” is understood to mean that the components of the additive composition are released over an extended period of time, for example throughout the life of the lubricating composition. The rate of release may vary depending on several factors, such as the location of the additive composition within the lubricating system, the composition of the additive composition, the form of the composition, and / or the mode of addition in which the additive composition is added to the lubricating composition. Adjusted by factors. Those having ordinary skill in the art can adjust any and / or all of the above factors to obtain the desired release rate of the additive composition.

  The additive concentrate may be located anywhere in the lubrication system as long as it is in contact with the lubricating composition. For example, the additive concentrate can be located in at least one of a filter, drain pan, oil bypass loop, canister, housing, tank, filter compartment, canister in the filter, canister in the bypass system, and the like. In certain embodiments, the lubrication system comprises an oil filter, which includes the additive concentrate disclosed herein.

  In another embodiment, the oil filter comprises a housing, such as a sleeve or cup, that can be partitioned, for example, at a non-diffusible boundary, thereby creating at least one additive compartment. Additive composition and / or used additive composition can be easily removed when the filter is removed and replaced with a new additive composition and / or recycled additive composition Filters are a desirable place for concentrate.

Further, the additive concentrate is present in the additive compartment of the oil filter, which additive compartment has at least one additive metering hole for adding a predetermined amount of additive concentrate to the oil over a period of time. Comprising. The at least one hole may be covered with a fatty substance, such as wax or other oil-soluble or oil-meltable substance, for transport purposes. This fatty material will not erode, decompose or dissolve over time when contacted with hot oil, and the additive concentrate will be released into the lubricant composition. This fatty material is not considered detrimental to any and / or all properties of the additive concentrate or lubricant composition.

  In yet another embodiment, the additive concentrate is placed elsewhere in the lubrication system. For example, the release additive is placed on the “dirty” side outside the oil filter, or on the “clean” side outside the oil filter. Regardless of the location of the additive concentrate, the additive concentrate is intended to be released into the lubricating composition over a predetermined period of time, such as throughout the life of the lubricating composition.

  The amount of additive concentrate released into the lubricating composition can be any effective amount as long as the TBN of the lubricating composition is maintained or increased throughout the life of the lubricating composition. For example, the TBN of the lubricating composition is maintained and / or increased by combining / mixing / mixing the disclosed additive concentrate and lubricating composition. By maintaining or increasing the TBN of the lubricating composition, it is believed that the engine oil drain spacing is extended compared to the spacing currently recommended by the manufacturer.

  In one embodiment, the passenger car engine oil drain spacing is extended by more than about 7,500 miles, such as about 10,000 miles, over a normal service interval. In another example, the truck engine oil drain interval of the truck corps is, for example, about 25,000 or less, about 15,000 miles or more, and in a further example about 35,000 miles than the normal truck fleet service interval. This is extended.

  The lubricating composition comprises a small amount of additive concentrate. As used herein, “small amount” is understood to mean about 50 wt% or less, such as about 40 wt% or less, or even about 30 wt% or less, based on the total weight of the lubricating composition. It is what is done. In certain embodiments, the additive concentrate is provided in an amount between about 0.0001% and about 49.9% by weight relative to the total weight of the lubricating composition.

  According to the present disclosure, the additive concentrate comprises at least one detergent having a TBN of at least about 100, at least one antioxidant, and additionally at least one viscosity index improver. As used herein, “cleaning agent” means a cleaning agent selected from sulfonates, phenates, salicylates, carboxylates, and combinations thereof, such that the TBN is at least about 100. It is considered to be. Accordingly, the detergent is a commercially available overbased calcium sulfonate detergent, an overbased detergent containing an alkali metal or alkaline earth metal such as Mg, Ba, Li, Sr, Na, Ca, K, and the like, and Selected from those mixtures. Non-limiting examples of overbased alkali metal or alkaline earth metal detergents include sodium sulfonate, sodium carboxylate, sodium salicylate, sodium phenate, sodium sulfide phenate, calcium sulfonate, carboxylic acid Calcium, calcium salicylate, calcium phenate, calcium sulfide phenate, lithium sulfonate, lithium carboxylate, lithium salicylate, lithium phenate, lithium sulfide phenate, magnesium sulfonate, magnesium carboxylate, magnesium salicylate, magnesium phenate, sulfide Examples include magnesium phenate, potassium sulfonate, potassium carboxylate, potassium salicylate, potassium phenate, and potassium sulfide phenate.

Suitable detergents are also selected from the metal salts of Mannich condensation products. Mannich condensation products used as cleaning agents are prepared using alkylphenols, formaldehyde, or aldehydes and nitrogen bases selected from among ammonia, lower alkylamines, and polyamines, and mixtures thereof.

  The alkyl group on the alkylphenol used to prepare the Mannich condensation product is a branched alkyl group, a linear alkyl group, or a mixture thereof. Desirably, the alkyl group is a branched alkyl group having from about 4 to about 60 carbon atoms. More desirably, the carbon number is 6 to about 40 or less, and most desirably the carbon number is about 8 to about 20 or less.

  Each of the cleaning agents described above is used alone or in a combination of two or more cleaning agents as described above. Commercial overbased detergent products are formed by reacting carbon dioxide with a mixture of lime (calcium hydroxide) and alkylbenzene sulfonic acid detergent to form micelles containing calcium carbonate. More than equivalent amounts of lime and carbon dioxide are used so that the detergent product is basic.

  Such substances are conveniently described in terms of total alkali number (TBN), which is a measurement of the base capacity of the detergent. A detergent TBN suitable for use herein can be from about 100 to about 600, such as from about 200 to about 500, or such as from about 300 to about 400. When a mixture of cleaning agents is used, it is desirable that the TBN of at least one cleaning agent is at least 300.

  Such detergents are present in the art such as from about 60% to about 90%, such as from about 70% to about 80% by weight, based on the total weight of the additive concentrate. Can be present in any effective amount that can be readily determined by those having ordinary skill in the art. Furthermore, the active ingredient content of the cleaning agent is about 60% or more. As used herein, “active ingredient content” refers to the amount of cleaning compound relative to inactive ingredients in cleaning agents such as process oils and diluents.

  The additive concentrate further comprises at least one antioxidant. There is no particular limitation on the type of antioxidant that can be used in accordance with the present disclosure. Antioxidants suitable for use herein include alkyl substituted phenols such as 2,6-di-tert-butyl-4-methylphenol, sulfurized phenates, phosphorylated terpenes, sulfurized esters, aromatic amines, This includes, but is not limited to, diphenylamine, alkylated diphenylamine, hindered phenol, and mixtures thereof.

  In one exemplary embodiment, the antioxidant is diallylamine or an alkyl derivative of diallylamine (eg, diphenylamine, bis-nonylated diphenylamine, nonyl diphenylamine, octyl diphenylamine, bis-octylated diphenylamine, bis-decylated diphenylamine, decyl diphenylamine). , And mixtures thereof.

  In another exemplary embodiment, the antioxidant is 2,6-di-t-butylphenol; sterically hindered phenols such as 4-methyl-2,6-di-t-butylphenol; 4-ethyl-2 , 6-di-t-butylphenol; 4-propyl-2,6-di-t-butylphenol; 4-butyl-2,6-di-t-butylphenol-2,6-di-t-butylphenol; 4-pentyl -2,6-di-t-butylphenol; 4-hexyl-2,6-di-t-butylphenol; 4-heptyl-2,6-di-t-butylphenol; 4- (2-ethylhexyl), 2,6 -Di-t-butylphenol; 4-octyl-2,6-di-t-butylphenol; 4-nonyl-2,6-di-t-butylphenol; 4-decyl-2,6-di-t-butylphenol 4-undecyl-2,6-di-t-butylphenol; 4-dodecyl-2,6-di-t-butylphenol; 4-tridecyl-2,6-di-t-butylphenol; 4-tetradecyl-2, 6-di-t-butylphenol; 4,4-methylenebis (6-t-butyl-o-cresol), 4,4-methylenebis (2-t-amyl-o-cresol), 2,2-methylenebis (4- Methylene-bridged sterically hindered phenols such as methyl-6-tert-butylphenol), 4,4-methylenebis (2,6 di-tert-butylphenol), and combinations thereof. In addition, sterically hindered phenol derivatives, including functionalized hindered phenols, are suitable for use herein. Functional groups used to functionalize hindered phenols include, but are not limited to, esters, thioesters, alkyl groups, amines, ketones, amides, sulfoxides, and sulfones.

  Another suitable antioxidant is an ester-substituted hindered phenol that is prepared by heating a 2,6-dialkylphenol with an acrylate ester under conditions of a basic catalyst such as aqueous KOH.

  The antioxidant is present in the additive concentrate in any effective amount, such as from about 10% to about 40% by weight, such as from about 15% to about 30% by weight, based on the total weight of the release additive composition. Exists.

  The additive concentrate optionally includes one or more viscosity modifiers (VM). Viscosity modifiers (VMs) function to give the lubricating oil operability at high and low temperatures. Suitable viscosity modifiers include polyisobutylene, copolymers of ethylene and propylene, and higher alpha olefins, polymethacrylates, polyalkylmethacrylates, methacrylate copolymers, copolymers of unsaturated dicarboxylic acids and vinyl compounds, interpolymers of styrene and acrylic esters And nitrogen selected from styrene / isoprene, styrene / butadiene, and partially hydrogenated copolymers of isoprene / butadiene, and partially hydrogenated homopolymers of butadiene and isoprene and isoprene / divinylbenzene. Some viscosity modifiers do not contain.

  The amount of viscosity modifier in the additive concentrate varies over a wide range. However, it is desirable to include a suitable amount of viscosity modifier to provide a predetermined amount of additive concentrate to the lubricant composition over a predetermined period of time. The amount of viscosity modifier should be less than the amount that causes the additive concentrate to exhibit gel, solid, or semi-solid properties. Accordingly, the additive concentrate includes from about 0 weight percent to about 20 weight percent viscosity modifier based on the total weight of the additive concentrate.

  Lubricating compositions such as current motor oils are made by combining a preformed additive package with a refined base oil stock or a synthetic base oil stock. The lubricating composition comprises a variety of different lubricant packages. Since lubricants are easier to handle and survey when they are in liquid form, additives that are usually solid are generally dissolved in a small amount of base oil stock. In certain embodiments of the present disclosure, the oil content of the additive concentrate is about 50 wt% or less, such as from about 5 wt% to about 30 wt%, based on the total weight of the additive concentrate. is there.

  Base oils suitable for use in preparing the additive concentrate are selected from either synthetic oils, mineral oils, or mixtures thereof. Mineral oils include paraffinic, naphthenic or paraffin-naphthenic mixed mineral oils treated with solvents and acids and other mineral lubricants such as liquid petroleum, as well as animal and vegetable oils (e.g. castor oil, Lard). Oils obtained from coal and shale are also suitable. In addition, oils obtained from a gas-to-liquid process are also suitable.

The viscosity of the base oil may be any viscosity suitable for the purpose. Suitable engine oils have a dynamic viscosity at 100 ° C. of, for example, from about 2 cSt to about 150 cSt, and in further examples from about 5 cSt to about 15 cSt. Thus, for example, the base oil is selected such that the viscosity of the additive concentrate is from about 10 cSt to about 50 cSt at 100 ° C.

  Non-limiting examples of synthetic oils include hydrocarbon oils such as polymerized and interpolymerized olefins (eg, polybutylene, polypropylene, propylene-isobutylene copolymers, etc.); poly (1-hexene), poly- ( 1-octene), poly (1-decene), etc., and polyalphaolefins such as mixtures thereof; alkylbenzenes (eg, dodecylbenzene, tetradecylbenzene, di-nonylbenzene, di- (2-ethylhexyl) benzene, etc.); Polyphenyl (eg, biphenyl, terphenyl, alkylated polyphenyl, etc.); alkylated diphenyl ether, alkylated diphenyl sulfide, and derivatives, analogs and homologues thereof are included.

Alkylene oxide polymers, interpolymers and their homologues whose terminal hydroxyl groups have been modified by esterification, etherification or the like constitute another class of usable synthetic oils already known. Such oils include oils prepared by polymerization of ethylene oxide or propylene oxide, alkyl and allyl ethers of these polyoxyalkylene polymers (eg, methyl-polyisopropylene glycol ether having an average molecular weight of about 1000, molecular weight of about 500-1000). Polyethylene glycol diphenyl ether, polypropylene glycol diethyl ether having a molecular weight of about 1000-1500, or the like, or a monocarboxylic acid ester or polycarboxylic acid ester thereof, such as tetraethylene glycol acetate, C _3-8 mixed fatty acid ester, Or exemplified by C ₁₃ oxo acid diesters and the like.

  Another type of synthetic oil used includes dicarboxylic acids (eg phthalic acid, succinic acid, alkyl succinic acid, alkenyl succinic acid, maleic acid, azelaic acid, suberic acid, sebacic acid, fumaric acid, adipic acid, linoleic acid. Esters of dimers, malonic acid, alkylmalonic acid, alkenylmalonic acid, etc.) and various alcohols (eg, butyl alcohol, hexyl alcohol, dodecyl alcohol, 2-ethylhexyl alcohol, ethylene glycol, diethylene glycol monoether, propylene glycol, etc.) included. Specific examples of these esters include dibutyl adipate, di (2-ethylhexyl) sebacate, di-n-hexyl fumarate, dioctyl sebacate, diisooctyl azelate, diisodecyl azelate, dioctyl phthalate, didecyl phthalate, sebacin Examples thereof include acid eicosyl, 2-ethylhexyl diester of linoleic acid dimer, ester complex formed by reacting 1 mol of sebacic acid with 2 mol of tetraethylene glycol and 2 mol of 2-ethylhexanoic acid.

Esters useful as synthetic oils also include C _5-12 monocarboxylic acids, polyols, polyol ethers, and the like, such as neopentyl glycol, trimethylolpropane, pentaerythritol, dipentaerythritol, tripentaerythritol. .

  Accordingly, the base oil used to produce the compositions described herein is selected from any of Group IV base oils specified in the American Petroleum Institute (API) Base Oil Compatibility Code. be able to.

  Group I contains 90% or less saturation and / or 0.03% or more sulfur and has a viscosity index of 80 or more and 120 or less; Group II has 90% or more saturation and 0.03% or less The viscosity index is 80 or more and 120 or less; Group III contains 90% or less saturation and 0.03% or less sulfur, and the clay index is 120 or more; Group IV is a polyalphaolefin (PAO); Group V includes all other base stocks not included in Group I, II, III, or IV.

The test method used to define the above group is ASTM for saturation.
D2007, viscosity index was ASTM D2270, and sulfur was one of ASTM D2622, 4294, 4927, and 3120.

  Group IV base stocks, or polyalphaolefins (PAOs), contain hydrogenated oligomers of alphaolefins, the most important methods of oligomerization being free radical processes, Ziegler catalysis, and cationic free Del Crafts catalysis.

  The viscosity of the polyalphaolefin is generally in the range of 2 cSt to 100 cSt at 100 ° C., for example in the range of 4 cSt to 8 cSt at 100 ° C. These are, for example, branched or straight chain alpha olefin oligomers having from about 2 to about 30 carbon atoms, including, but not limited to, polypropene, polyisobutene, poly-1-butene, poly-1-hexene, poly -1-octene and poly-1-decene are included. Also included are homopolymers, interpolymers, and mixtures thereof.

  With respect to the balance of base stock quoted above, “Group I base stock” also provides that the resulting mixture has characteristics that fall within the ranges specified for the Group I base stock. Also included are Group I base stocks that can be mixed with base stocks from one or more other groups.

  Exemplary base stocks include Group I base stocks and mixtures of Group II base stocks and Group I bright stocks.

  Base stocks suitable for use herein include a variety of different processes, including but not limited to processes such as distillation, solvent purification, hydrogen process, oligomerization, esterification, and repurification. Can be made using.

The base oil is an oil obtained from a Fischer-Tropsch synthesized hydrocarbon. Fischer-Tropsch synthesized hydrocarbons are made from synthesis gas containing H ₂ and CO using a Fischer-Tropsch catalyst. In order to make such hydrocarbons useful as base oils, further processes are generally required. For example, the hydrocarbon can be hydroisomerized using the process described in US Pat. No. 6,103,099 or 6,180,575, or US Pat. No. 4,943,672 or 6,096,940. Hydrocracking and hydroisomerization using the process described in US Pat. No. 5,882,505, or dewaxing using the process described in US Pat. No. 5,882,505, or US Pat. No. 6,013,171, 6, Hydroisomerization and dewaxing can be performed using the process described in 080,301, or 6,165,949.

Use unrefined, refined, and rerefined oils of the type disclosed herein above in the base oil, whether mineral or synthetic (as well as any two or more mixtures thereof). Can do. Unrefined oil is obtained directly from mineral or synthetic oil sources without refining treatment. Unrefined oils include, for example, shale oil obtained directly from the retort process, petroleum oil obtained directly from primary distillation, or ester oil obtained directly from the esterification process and used without further processing. is there. Refined oils are similar to unrefined oils except that they have been processed in one or more purification steps to improve one or more properties. Many of the purification techniques, such as solvent extraction, secondary distillation, acid or base extraction, filtration, permeation, etc. are known to those skilled in the art. A re-refined oil is obtained by applying a process similar to that used to obtain the refined oil to the refined oil already used. Such rerefined oils, also known as reclaimed or reprocessed oils, are often further processed by techniques aimed at removing spent additives, contaminants, and oil decay products.

Examples The following examples illustrate the invention and its advantageous properties. As in other parts of this specification, in this example, all parts and percentages represent weight parts and weight percentages unless otherwise specified. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention disclosed herein.

  The additive concentrate is a 500 TBN calcium sulfonate wash with an amount of base oil sufficient to bring the amount of base oil in the additive concentrate to less than about 30 weight percent and an active ingredient content of about 64%. It is produced by mixing 75% by weight of an overbased detergent such as an agent with 25% by weight of an antioxidant such as an alkylated diphenylamine.

  In the present specification and the appended claims, the use of singular words such as “a,” “an,” and “the” is not expressly limited to the singular. Note that it includes multiple meanings. Thus, for example, the expression “an antioxidant” includes two or more different antioxidants. Also, as used herein, the phrase “include” and grammatical variations thereof exclude other similar items from which the listed items may be substituted or added. Not intended to be limiting.

  For the purposes of this specification and the appended claims, unless otherwise specified, all numerical values representing quantities, percentages, or ratios, and all other numerical values used in the specification and claims, are in all cases. It is thought that it is modified with the word “about”. Accordingly, unless specified to the contrary, the numerical parameters set forth in the specification and appended claims are approximations that may vary depending upon the desired properties sought to be obtained by the present disclosure. At least, and not as an attempt to limit the application of the principle of equality to the scope of the claims, each numerical parameter should be interpreted taking into account at least the number of significant figures reported and the application of normal rounding It is.

  While specific embodiments have been described, alternatives, changes, changes, improvements, and other corresponding technologies that have not been foreseen or foreseeable at this time and that substantially correspond to the applicant or other techniques familiar to the art It may be discovered by a person. Accordingly, the appended claims that may be submitted or modified are intended to include all such alternatives, modifications, variations, improvements, and substantially corresponding content.

The main features and aspects of the present invention are as follows.
1. A sustained release liquid additive concentrate for use in an engine oil filter comprising at least one detergent and at least one antioxidant, the additive concentrate having a tangent delta of about 5 A sustained-release liquid additive concentrate characterized by the above.
2. The additive concentrate of claim 1, wherein the detergent has a TBN of between about 100 and about 600.
3. The additive concentrate of claim 1, wherein the detergent has a TBN of between about 200 and about 500.
4). The additive concentrate of claim 1, wherein the active ingredient content of the concentrate is at least about 60% by weight, based on the total weight of the concentrate.
5). The additive concentrate of claim 1, wherein the cleaning agent is selected from the group consisting of sulfonates, phenates, salicylates, carboxylates, metal salts, Mannich condensation products, and combinations thereof.
6). Cleaning agent is sodium sulfonate, sodium carboxylate, sodium salicylate, sodium phenate, sodium sulfide phenate, calcium sulfonate, calcium carboxylate, calcium salicylate, calcium phenate, calcium sulfide phenate, lithium sulfonate, carboxylic acid Lithium, lithium salicylate, lithium phenate, lithium sulfide phenate, magnesium sulfonate, magnesium carboxylate, magnesium salicylate, magnesium phenate, magnesium sulfide phenate, potassium sulfonate, potassium carboxylate, potassium salicylate, potassium phenate, sulfide The additive concentrate of claim 1, wherein the concentrate is selected from the group consisting of potassium phenate and combinations thereof.
7). The additive concentrate of claim 1, wherein the cleaning agent is present in an amount of about 60% to about 90% by weight relative to the total weight of the additive concentrate.
8). The additive concentrate of claim 1, wherein the detergent is present in an amount of about 70% to about 80% by weight relative to the total weight of the additive concentrate.
9. The additive concentration of claim 1, wherein the antioxidant is selected from the group consisting of alkyl-substituted phenols, sulfurized phenates, phosphorylated terpenes, sulfurized esters, aromatic amines, hindered phenols, and combinations thereof. object.
10. 10. The additive concentrate of claim 9, wherein the hindered phenol comprises at least one functional group selected from the group consisting of esters, thioesters, alkyl groups, amines, ketones, amides, sulfoxides and sulfones.
11. The hindered phenol is 2,6-di-t-butylphenol; 4-methyl-2,6-di-t-butylphenol; 4-ethyl-2,6-di-t-butylphenol; 4-propyl-2,6 -Di-t-butylphenol; 4-butyl-2,6-di-t-butylphenol-2,6-di-t-butylphenol; 4-pentyl-2,6-di-t-butylphenol; 4-hexyl-2 , 6-di-t-butylphenol; 4-heptyl-2,6-di-t-butylphenol; 4- (2-ethylhexyl), 2,6-di-t-butylphenol; 4-octyl-2,6-di -T-butylphenol; 4-nonyl-2,6-di-t-butylphenol; 4-decyl-2,6-di-t-butylphenol; 4-undecyl-2,6-di-t-butylphenol 4-dodecyl-2,6-di-t-butylphenol; 4-tridecyl-2,6-di-t-butylphenol; 4-tetradecyl-2,6-di-t-butylphenol; 4,4-methylenebis (6-t-butyl-o-cresol), 4,4-methylenebis (2-t-amyl-o-cresol), 2,2-methylenebis (4-methyl-6-t-butylphenol), 4,4- 10. The additive concentrate of claim 9, wherein the additive concentrate is selected from the group consisting of methylene bridged sterically crowded phenols such as methylene bis (2,6 di-t-butylphenol), and combinations thereof.
12 10. The additive concentrate of claim 9, wherein the aromatic amine is selected from the group consisting of diallylamine, alkyl derivatives of diallylamine, and combinations thereof.
13. The additive concentrate according to 1 above, wherein the additive concentrate is substantially free of a nitrogen-containing dispersant.
14 The additive concentrate of claim 1, wherein the antioxidant is present in an amount of about 10% to about 40% by weight relative to the total weight of the additive concentrate.
15. The additive concentrate of claim 1, wherein the antioxidant is present in an amount of about 15 wt% to about 30 wt%, based on the total weight of the additive concentrate.
16. The additive concentrate of claim 1, wherein the concentrate further comprises a viscosity index improver that does not contain nitrogen atoms.
17. The additive concentrate according to claim 1, wherein the concentrate further comprises an oil in an amount of about 5 wt% to about 30 wt% or less based on the total weight of the additive concentrate.
18. A method for extending the oil drain interval of an automobile, comprising attaching an oil filter comprising a release additive liquid that is released into the engine oil at regular intervals, wherein the release additive liquid includes at least one A method characterized in that it contains at least one type of detergent and at least one antioxidant and the tangent delta of the release additive solution is about 5 or more.
19. 19. The method of claim 18, wherein the detergent has a TBN between about 100 and about 600.
20. 19. The method of claim 18, wherein the detergent has a TBN of between about 200 and about 500.
21. 19. The method of claim 18, wherein the active ingredient content of the release additive is at least about 60% by weight based on the total weight of the additive.
22. The method of claim 18, wherein the cleaning agent is selected from the group consisting of sulfonates, phenates, salicylates, carboxylates, metal salts, Mannich condensation products, and combinations thereof.
23. Cleaning agent is sodium sulfonate, sodium carboxylate, sodium salicylate, sodium phenate, sodium sulfide phenate, calcium sulfonate, calcium carboxylate, calcium salicylate, calcium phenate, calcium sulfide phenate, lithium sulfonate, carboxylic acid Lithium, lithium salicylate, lithium phenate, lithium sulfide phenate, magnesium sulfonate, magnesium carboxylate, magnesium salicylate, magnesium phenate, magnesium sulfide phenate, potassium sulfonate, potassium carboxylate, potassium salicylate, potassium phenate, sulfide The method of claim 18, wherein the method is selected from the group consisting of potassium phenate and combinations thereof.
24. The method of claim 18, wherein the cleaning agent is present in an amount of about 60% to about 90% by weight relative to the total weight of the release additive.
25. 19. The method of claim 18, wherein the cleaning agent is present in an amount of about 70% to about 80% by weight relative to the total weight of the release additive.
26. 19. The method of claim 18, wherein the antioxidant is selected from the group consisting of alkyl substituted phenols, sulfurized phenates, phosphorylated terpenes, sulfurized esters, aromatic amines, hindered phenols, and combinations thereof.
27. 27. The method of claim 26, wherein the hindered phenol further comprises at least one functional group selected from the group consisting of esters, thioesters, alkyl groups, amines, ketones, amides, sulfoxides, and sulfones.
28. The hindered phenol is 2,6-di-t-butylphenol; 4-methyl-2,6-di-t-butylphenol; 4-ethyl-2,6-di-t-butylphenol; 4-propyl-2,6 -Di-t-butylphenol; 4-butyl-2,6-di-t-butylphenol-2,6-di-t-butylphenol; 4-pentyl-2,6-di-t-butylphenol; 4-hexyl-2 , 6-di-t-butylphenol; 4-heptyl-2,6-di-t-butylphenol; 4- (2-ethylhexyl), 2,6-di-t-butylphenol; 4-octyl-2,6-di -T-butylphenol; 4-nonyl-2,6-di-t-butylphenol; 4-decyl-2,6-di-t-butylphenol; 4-undecyl-2,6-di-t-butylphenol 4-dodecyl-2,6-di-t-butylphenol; 4-tridecyl-2,6-di-t-butylphenol; 4-tetradecyl-2,6-di-t-butylphenol; 4,4-methylenebis (6-t-butyl-o-cresol), 4,4-methylenebis (2-t-amyl-o-cresol), 2,2-methylenebis (4-methyl-6-t-butylphenol), 4,4- 27. The method of claim 26, wherein the method is selected from the group consisting of methylene bridged sterically crowded phenols such as methylene bis (2,6 di-t-butylphenol), and combinations thereof.
29. 27. The method of claim 26, wherein the aromatic amine is selected from the group consisting of diallylamine, alkyl derivatives of diallylamine, and combinations thereof.
30. 19. The method of claim 18, wherein the release additive is substantially free of nitrogen containing dispersant. 31. 19. The method of claim 18, wherein the antioxidant is present in an amount from about 10% to about 40% by weight relative to the total weight of the release additive.
32. 19. The method of claim 18, wherein the antioxidant is present in an amount from about 15% to about 30% by weight relative to the total weight of the release additive.
33. 19. The method of claim 18, wherein the release additive further comprises a viscosity index improver that does not contain nitrogen atoms.
34. 19. The method of claim 18, wherein the release additive further comprises an amount of oil from about 5% to about 30% by weight or less based on the total weight of the release additive.

Claims (10)

  A sustained release liquid additive concentrate for use in an engine oil filter comprising at least one detergent and at least one antioxidant, the additive concentrate having a tangent delta of about 5 A sustained-release liquid additive concentrate characterized by the above.   The additive concentrate of claim 1, wherein the detergent has a TBN of between about 100 and about 600.   The additive concentrate of claim 1, wherein the cleaning agent is selected from the group consisting of sulfonates, phenates, salicylates, carboxylates, metal salts, Mannich condensation products, and combinations thereof.   The additive concentrate of claim 1, wherein the detergent is present in an amount of about 60 wt% to about 90 wt%, based on the total weight of the additive concentrate.   The additive of claim 1, wherein the antioxidant is selected from the group consisting of alkyl-substituted phenols, sulfurized phenates, phosphorylated terpenes, sulfurized esters, aromatic amines, hindered phenols, and combinations thereof. Concentrate.   The additive concentrate of claim 1, wherein the additive concentrate is substantially free of nitrogen-containing dispersant.   A method for extending the oil drain interval of an automobile, comprising attaching an oil filter comprising a release additive liquid that is released into the engine oil at regular intervals, wherein the release additive liquid includes at least one A method characterized in that it contains at least one type of detergent and at least one antioxidant and the tangent delta of the release additive solution is about 5 or more.   8. The method of claim 7, wherein the antioxidant is selected from the group consisting of alkyl substituted phenols, sulfurized phenates, phosphorylated terpenes, sulfurized esters, aromatic amines, hindered phenols, and combinations thereof.   8. The method of claim 7, wherein the antioxidant is present in an amount from about 15% to about 30% by weight relative to the total weight of the release additive.   8. The method of claim 7, wherein the release additive further comprises a viscosity index improver that does not contain nitrogen atoms.