JPH0635590B2 - Grease composition containing a boron compound and a hydroxyl-containing soap thickener - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a new group of compositions, in particular consisting of an oil, a hydroxyl-containing soap thickener and an amine borate,
It relates to a synergistic grease composition optionally containing phosphorus and sulfur components.

Greases thickened with metal salts of hydroxystearic acid, especially lithium hydroxystearate, are as well known as the use of "additive packages". It is known that these packages contain, in addition to a phosphorus compound and a sulfur compound, other additives that impart properties such as antioxidant, detergency and dispersibility to such grease.

It is also known from U.S. Pat. No. 4,328,113 that borated amines such as borated hydrocarbyl mono- and diamines are effective as lubricants, especially in lubricants. However, the prior art as taught or suggested that the combination of known additive packages, such as those mentioned here, with special thickeners and the borated amines according to the invention gives surprising results. Is not known.

In the present invention, the grease vehicle that occupies the majority and the following formula: (In the formula, x is 0 to 2, and R, R ¹ , R ³ and R ⁴ are hydrogen, or an alkyl group having 6 to 20 carbon atoms, and 2 to 4 carbon atoms.
Represents a C ₁ -C ₃₀ hydrocarbyl group including a hydroxyalkyl group having 6 to 20 carbon atoms, a polyalkoxylated group having 6 to 20 carbon atoms and sulfur or an oxygen-containing corresponding group thereof,
At least one of R, R ¹ , R ³ and R ⁴ is a hydrocarbyl group, that is, R ² is a C ₂ -C ₄ alkylene group, not hydrogen, and boric acid, boron oxide, Metaboric acid ester, a similar boron source or the following formula: (R ⁵ O) yB (OH) z (wherein y is 1 to 3, z is 0 to 2, y and z
And a small amount of a compound produced by reaction with a boron compound which is an alkyl borate represented by the formula ( ⁵ ), wherein R ⁵ represents an alkyl group having 1 to 6 carbon atoms. Is provided with a hydroxyl-containing soap thickener to provide an improved grease composition having a high drop point. The presence of phosphorus and sulfur components results in uniformly high dropping points. Alkyl borate includes monoalkyl borate, dialkyl borate and trialkyl borate, ie, such borate esters of methyl, ethyl, propyl, butyl, pentyl and hexyl.

Desirably, the amine is over-borated. "Excessive boration" means that a stoichiometric amount or more of boron is present in the boration product with respect to the amine.

The borated amines of the present invention can be prepared by reacting an amine of the above formula with a boron compound such as, for example, boron oxide, boron, alkyl borate or mixtures thereof. The obtained product is considered to be mainly amine borate, but other products considered to be present are metaborate and the like. In the range of amines represented by the above formula, (1) for example, hexylamine, octylamine, nonylamine, decylamine, dodecylamine, tetradecylamine, octadecylamine, eicosylamine, triacontylamine, oleylamine, stearylamine, iso Primary amines such as stearylamine, tallow amine and soybean amine; (2) secondary amines corresponding to (1) having two groups which are the same or two different groups; (3) groups in the same molecule All have the same or different corresponding tertiary amines; and (4) eg N-octyl-1,2-
Ethylenediamine, N-octyl-1,3-propylenediamine, N-coco-1,2-ethylenediamine or N-coco-1,3-propylenediamine, N-oleyl-1,2-ethylenediamine or N-oleyl-
Such as 1,3-propylenediamine, N-soya-1,2-ethylenediamine or N-soya-1,3-propylenediamine and N-beef-1,2-ethylenediamine or N-beef-1,3-propylenediamine. It is a diamine. Secondary amines include N-ethyl-N-oleylamine, N-methyl-N-soyamine, and tertiary amines include N, N-diethyl-N-oleylamine.

Alkoxylated amines included in the present invention include bis (2
-Hydroxyethyl) oleylamine, bis (2-hydroxypropyl) oleylamine, bis (2-hydroxyethyl) tallow amine, bis (2-hydroxypropyl) tallow amine, (hydroxyethyl) (hydroxypropyl) tallow amine, polyethoxylated oleylamine (Containing 7 ethoxyl groups) and polyethoxylated tallow amine (containing 3 ethoxyl groups). Also included are hydroxylalkyl amines prepared by ethoxylation or propoxylation of hydrocarbyl diamines or hydrocarbyl triamines. In particular, aromatic and alkyl- or alkylene-substituted aromatic amines having 6 to 30 carbon atoms are also included. Further included are alkoxyalkylamines such as dodecyloxypropylamine, triisodecyloxypropylamine and similar oxygen containing amines, and corresponding alkoxydiamines such as N-alkoxyhydrocarbyleneamines.

The reaction to form the borated amine or borate ester is at a temperature of about 80 ° C to 260 ° C, preferably about 11 ° C.
It is carried out at temperatures between 0 ° C and about 180 ° C. This temperature is selected primarily depending on the particular reactants and whether or not a solvent is used. The pressure of the reaction can be vacuum, atmospheric pressure or positive pressure. When carrying out this reaction, it is desirable to select the reactant amounts so that the molar ratio of amine to boron compound is from about 0.2 to about 2, preferably from about 0.5 to about 0.9. The amine can be reacted with an excess of borating agent to form a borated amine containing about 0.1 wt% up to about 10 wt% or more boron.

It is generally preferred that the reaction pressure be atmospheric pressure, but about 1
The reaction can be advantageously carried out at pressures from atmospheric pressure up to about 5 atmospheres. In addition, solvents can be used where conditions permit. Generally, benzene, toluene,
Relatively non-polar, non-reactive solvents can be used, including xylene and 1,4-dioxa. Other hydrocarbons and alcoholic solvents including propanol, butanol, hexamethylene glycol and the like can be used. Mixtures of alcoholic solvents and hydrocarbon solvents can also be used.

Reaction time is not important. Any stage of the process can occur in a time period of about 1 hour to about 20 hours.

The use of a narrow range of thickeners is desirable in the manufacture of the greases of this invention. Preferred thickeners include those containing at least small amounts of hydroxyl group-containing fatty acids containing from 12 to about 30 carbon atoms per molecule, fatty acid glycerides and fatty acid ester alkali metals, alkaline earth metals or amine soaps. Agents are included. Representative metals are sodium, lithium, calcium and barium, with lithium being particularly preferred. Preferred among these acids and aliphatics are 12-hydroxystearic acid and glycerides, esters including 12-hydroxystearate, 14-hydroxystearic acid, 16-hydroxystearic acid and 6-hydroxystearic acid. .

It is not necessary to select the total amount of thickener among the desirable thickeners mentioned above. By choosing from among such thickeners about 15% by weight of the total thickener, clear benefits are obtained. Of this supplementary amount, ie 85% by weight
A wide range of thickeners can be used in the grease of the present invention as a thickener. Other useful thickeners include methyl-12-hydroxystearate, C ₄ -C.
₁₂ Includes dicarboxylic acid diesters and tall oil or marine oil fatty acid alkali metal soaps and alkaline earth metal soaps. Other alkali or alkaline earth metal salts of fatty acids having 12 to 30 carbon atoms and containing no free hydroxyl group are also used. These also include soaps of stearic acid and oleic acid.

Other thickeners include acetic acid-calcium stearate-calcium (US Pat. No. 2,197,263), acetic acid-barium stearate (US Pat. No. 2,564,561), acetic acid-caprylic acid-stear. Calcium phosphate complex (US Pat. No. 2,999,065), acetic acid-calcium caprylate (US Pat. No. 2,999,066) and calcium salts of low, medium and high molecular weight acids and walnut oil acid. And salt-salt complexes, such as and soaps.

Another group of thickeners consists of urea substitutes, phthalocyanines, indanthrenes and pigments such as perylimide, pyromellitodiimide and ammeline, and certain hydrophobic clays. These thickeners are initially made from clays that are hydrophilic by pretreating these clays with an organic cationic surfactant, such as an onium compound, before using them as a constituent of a grease composition. About
It can be produced by introducing long-chain hydrocarbon radicals into the surface of clay particles and converting them into a hydrophobic state.
Typical onium compounds are tetraalkylammonium chlorides, such as dimethyloctadecyl ammonium chloride, dimethyldibenzyl ammonium chloride and mixtures thereof. This conversion method is well known to those skilled in the art and is considered to require no further investigation and is not part of the present invention.

The production of thickeners can be carried out in various grease making equipment, for example open kettles at reduced pressure, atmospheric pressure and positive pressure; high pressure reaction chambers operated at pressures of the order of 180 psig; or continuous reactors. . The temperature range of the grease block during production is 15 ° C (60 ° F) to 238 ° C (460 ° C).
The range of F) can be taken.

The third component that may be present in the grease composition is small amounts of phosphorus and sulfur. Both phosphorus and sulfur have the formula: (In the formula, R ⁶ is a hydrocarbyl group having 3 to 18 carbon atoms, and M is
Is a metal or non-metal, n is the valence of M and Z is oxygen or sulfur, and at least one of Z is sulfur, and is the same, such as a metal or non-metal phosphorodithioate. It can be present in the molecule.

In this compound, R ⁶ is preferably an alkyl group, which may be a propyl, butyl, pentyl, hexyl, octyl, decyl, dodecyl, tetradecyl or octadecyl group, propanol, isopropanol, butanol, isobutanol, sec-butanol, It includes groups derived from 4-methyl-2-pentanol, 2-ethylhexanol, oleyl alcohol and mixtures thereof. Further included are alkaryl groups such as butylphenyl, octylphenyl, nonylphenyl and dodecylphenyl groups.

The metals represented by M include the Group IA and Group IX of the Periodic Table.
Includes Group IIA, Group IIB and Group VIII metals. Some examples that may be mentioned are lithium, molybdenum,
Sodium, calcium, zinc, cadmium, silver and gold. Non-metal ions include, for example, vinyl esters such as vinyl acetate, vinyl ethers such as butyl vinyl ether, epoxides such as propylene oxide and 1,2-epoxidodecane, and organic groups derived from amine salts. Further, such non-metal ions include oleylamine and N-oleyl-1,3-
Included are nitrogen-containing groups such as groups derived from hydrocarbyl amines and diamines, including propylene diamine, and groups derived from imidazolines and oxazolines.

Phosphorus and sulfur are, for example, (1) 2-1 for each hydrocarbyl group
A dihydrocarbyl phosphite or phosphite mixture having 0 carbon atoms, and (2) a combination of sulphides such as isobutylene sulphide, dibenzyl disulphide, terpenes sulphide, phosphorodithionyl disulphide and sulphidium linteus oil. Can also be supplied from a combination of two kinds of compounds. Such phosphite ester,
It includes phosphite esters such as dibutyl phosphite, dihexyl phosphite, dioctyl phosphite and didecyl phosphite. Phosphate esters containing 4 to 20 carbon atoms in each hydrocarbyl group can also be used, for example tributyl phosphate, tridecyl phosphate, tricresyl phosphate and mixtures of such phosphates. .

In summary, in practicing the invention resulting in a grease with a greatly improved full score, it is important to formulate in the composition at least the first two of the above-mentioned components. Thus, first of all, for the production of greases, at least about 15% by weight of the thickener is a metal or non-metal hydroxyl-containing soap and the total amount of thickener is about 3% by weight of the total grease composition. % To about 20% by weight.

The boric acid amide, such as that obtained by reacting the amine with at least an equal amount of a boron compound, is then added to about 0.
It is added to the grease in an amount of 01% to about 10% by weight, preferably about 0.1% to about 2% by weight.

In addition, as an optional third component, the composition comprises from 0.01% by weight to a phosphorus-containing and sulfur-containing compound or a mixture of two or more compounds such that small amounts of phosphorus and sulfur can be separately fed. Up to 10% by weight, preferably 0.
It can be contained in an amount of from 2% to about 2% by weight. If separate compounds are used, an amount equal to the above concentration level of the mixture is used to provide the desired amounts of phosphorus and sulfur.

When a hydroxyl-containing thickener is used with an amine borate, the grease is compared to a grease made from the same grease vehicle and the same amine borate with a different thickener, such as a non-hydroxyl-containing thickener. It was noted that the drop point was always unexpectedly high.

In general, the reaction products of the present invention can be used in amounts that are effective to provide the desired friction-reducing soil, antiwear, antioxidant, high temperature stability or rust resistance. Also, in many applications, amine borate and phosphorus-containing compounds and / or sulfur-containing compounds are combined in an amount of about 0.02% to about 20%, preferably about 0.2% to about 4% by weight of the total composition. In quantity, it can be used effectively.

The greases of the present invention can be made from mineral or synthetic oils, or mixtures thereof. Generally, both mineral oils, paraffinic oils and naphthenic oils and mixtures thereof, such as from about 445 SSU at 100 ° F to about 6000 SSU at 100 ° F, preferably from about 50 SSU to about 250 SSU at 210 ° F. Those having an appropriate lubricating viscosity range are used. These oils may have a viscosity index in the range of up to about 100 or higher, although oils having a viscosity index of from about 70 to about 95 are desirable. The average molecular weight of these oils ranges from about 250 to about 800. In the production of grease, the lubricating oil from which the grease is made has the purpose of maintaining the balance of the overall grease composition after revealing the desired amounts of thickeners and other additive components to be included in the grease composition. Used in an amount sufficient to

When synthetic oils are desired over mineral oils, various compounds of this type can be used with success. Typical synthetic vehicles include polyisobutylene, polybutene, hydrogenated polydecene, polypropylene glycol, polyethylene glycol, trimethylol propane ester, neopentyl ester and pentaerythritol ester, di (2-ethylhexyl) sebacate, di (2) adipate. -Ethylhexyl), dibutyl phthalate, fluorocarbon, silicate ester, silane, phosphorus acid ester,
Liquid urea, ferrocene derivatives, hydrogenated synthetic oils, linear polyphenyls, siloxanes and silicones (polysiloxanes), and alkyls represented by butyl-substituted bis (p-phenoxyphenyl) ethers, phenoxyphenyl ethers. Substituted diphenyl ethers are included.

Metallurgical soap grease compositions containing one or more amine borates and optionally one or more sulfur and phosphorus combinations as described herein are found to have increased drop point and grease thixotropy and rust protection. It advantageously acts to improve the toughness and enables the benefits of anti-fatigue, anti-wear and anti-oxidation properties not obtained with the greases of the prior art. The grease of the present invention is unique in that it is preferably produced by admixing an amount of boric alcohol added to fully formed soap after saponification.

The invention will be described in more detail by the following examples.
These examples are illustrative only and are not intended to limit the invention.

Example 1 N-oleyl-1,3-propylenediamine (obtained as Deuomin O from Armak Chemical Co., Ltd.) 129
5 g, xylene 218 g, n-butanol 437 g, hexamethylene glycol 658 g and boric acid 1210 g
Was charged to a reactor equipped with a Dean-Stark tube equipped with a heater, stirrer and condenser and refluxed for about 10 hours until all the azeotropic distillation formed during the reaction was reached (maximum temperature Was about 195 ° C). The solvent was removed by vacuum distillation at 195 ° C., the product was passed over, then diluted with an equal volume of 100 sec process oil to form a 50% concentrate of borated diamine in mineral oil. The concentrate was an orange colored viscous oil.

Example 2 N-Tallow-1,3-propylenediamine (obtained as Deuomin T from Armak Chemical Co.) was borated with boric acid as generally described in Example 1. For convenience of handling, borated N-beef tallow-1,3
-Propylenediamine was mixed with an equal amount of 100 second process oil to form a 50% concentrate in mineral oil.

Comparative Example 1 12-hydroxystearic acid grease thickener (8
%) And its glyceride (9%) at about 177 ° C. in a closed contactor by saponification with lithium hydroxide contained in mineral oil to give lithium hydroxystearate grease thickening. The agent was manufactured.

Comparative Example 2 After depressurizing and dehydrating the thickener in the open-type kettle, mineral oil was sufficiently added to reduce the thickener concentration to about 9.0%. After cooling to about 99 ° C., amine / antioxidants, phenolic antioxidants, metal dithiophosphates (where the alkyl group is C ₃ -C ₆
A typical grease additive package consisting of zinc dialkylphosphorodithioate (1.5% by weight) derived from a mixture of primary alcohols, a sulfur-containing metal deactivator and a nitrogen-containing antirust additive. Was added.

Example 3 To the base grease of Comparative Example 2 was added at about 110 ° C 0.5% by weight of borated N-oleyl-1,3-propylenediamine of Example 1.

Example 4 To the base grease of Comparative Example 2 was added at about 115 ° C 1.0% by weight of borated N-beef tallow-1,3-propylenediamine of Example 2.

Example 5 The base grease of Comparative Example 1 was added to the borated N of Example 1
0.5% by weight of olei-1,3-propylenediamine was added.

Example 6 Example 6 was repeated except that 2% by weight of borated amine was used.

Comparative Example 3 The base grease was thickened with a non-hydroxyl containing thickener, lithium soap, in a 50/50 / (wt) mixture of stearic acid and palmitic acid.

Comparative Example 4 50% by weight of the base grease used in Comparative Example 2 containing a 50/50 mixture of a hydroxyl-containing thickener and a non-hydroxyl-containing thickener plus grease 50 of Comparative Example 3.
weight%.

Comparative Example 5 Comparative Example 3 containing 2% by weight of the borated amine of Example 2
Base grease.

The following table shows the results obtained by the ASTM D2265-78 grease dropping point test.

Examples 3 and 4 demonstrate the significant effect on dropping point improvement when amine borate is added to a hydroxyl-containing carboxylate soap thickener in the presence of phosphorus and sulfur sources.

Examples 5 and 6 show the significant effect on greases thickened with hydroxyl-containing carboxylate soaps with the above-mentioned borated amines.

Comparative Examples 3, 4 and 5 show that amine borate does not provide any benefit to the dropping point of greases thickened with hydroxyl free carboxylate soaps.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location C10M 133: 54) C10N 20:00 A 8217-4H 50:10 (72) Inventor Jiyoung Anton Keller Junier United States New Jersey 08071, Pittman, Thompson Avenyu 10 (56) References JP-A-56-115398 (JP, A) JP-A-58-125794 (JP, A) JP-A-51-102001 (JP, 51-2001) A) JP-A-53-115706 (JP, A)

Claims (28)

[Claims] 1. An improved grease composition comprising the following i) and
And ii), i) the grease vehicle which is predominant; ii)By reacting the amine represented by
About 0.01% to about 10% by weight of the reaction product obtained
% (In the formula, x is 0 to 2, R, R¹, R³And R^FourIs
Hydrogen, or a hydrocarbyl group having 1 to 30 carbon atoms, carbon
A hydroxyalkyl group having 2 to 4 carbon atoms and a polyalkyl group having 6 to 20 carbon atoms
Contains a rearkoxylated group or sulfur or additional oxygen
R, R¹, R³And R^FourSmall
At least one is not a hydrogen group, but R 2 is C₂~ C_FourThe al
Is a xylene group);
Concentrated by thickeners including xyl-containing soap thickeners
It is characterized by being. 2. A patent which further comprises from about 0.01% to about 10% by weight of a compound containing both phosphorus and sulfur or a mixture of a phosphorus-containing compound and a sulfur-containing compound to give equal amounts of phosphorus and sulfur. A composition according to claim 1. 3. The composition according to claim 1, wherein the thickening agent is a hydroxyl-containing fatty acid having 12 to 30 carbon atoms, an alkali metal, an alkaline earth metal or an amine soap of a fatty acid glyceride or a fatty acid ester. 4. The composition according to claim 3, wherein the metal is sodium, lithium, calcium or barium. 5. The thickener is 12-hydroxystearic acid,
A composition according to claim 3 which is derived from 14-hydroxystearic acid, 16-hydroxystearic acid, 6-hydroxystearic acid or glycerides or esters thereof. 6. R, R ¹ , R ³ and R ⁴ are hydrogen or an alkyl group having 6 to 20 carbon atoms, and at least one of them is used.
The composition of claim 1 wherein one is not hydrogen. 7. The amine is (1) hexylamine, octylamine, nonylamine,
Decylamine, dodecylamine, tetradecylamine,
Octadecylamine, eicosylamine, triacontylamine, oleylamine, stearylamine, isostearylamine, tallowamine, soybean amine, (2) a secondary amine corresponding to (1) having two groups which are the same or different from each other, (3 ) Corresponding tertiary amines in which all groups in each molecule are the same or different, or (4) N-octyl-1,2-ethylenediamine, N-octyl-1,3-propylenediamine, N-coco-1,
2-ethylenediamine, N-coco-1,3-propylenediamine, N-oleyl-1,2-ethylenediamine,
N-oleyl-1,3-propylenediamine, N-soybean-1,2-ethylenediamine, N-soybean-1,3-propylenediamine, N-beef tallow-1,2-ethylenediamine, N-beef tallow-1,3- Propylenediamine, N-ethyl-N-oleylamine, N-methyl-N-soyamine, N, N-diethyl-N-oleylamine, bis (2
-Hydroxyethyl) oleylamine, bis (2-hydroxypropyl) oleylamine, bis (2-hydroxyethyl) tallow amine, bis (2-hydroxypropyl) tallow amine, (hydroxyethyl) (hydroxypropyl) tallow amine, 7 ethoxyls Group-containing polyethoxylated oleylamine, 3 ethoxylated group-containing polyethoxylated tallow amine, hydroxyalkylamines produced by ethoxylation or propoxylation of hydrocarbyldiamines or hydrocarbyltriamines, dodecyloxypropylamine or tri- The composition of claim 1 which is isodecyloxypropylamine. 8. A boron compound as boric acid, oxidized boric acid, metaborate ester or monomethyl borate, dimethyl borate and trimethyl borate; monoethyl borate, diethyl borate and triethyl borate; monopropyl borate, borate. Dipropyl and tripropyl borate; monobutyl borate, dityl borate and tributyl borate; monopentyl borate; dipentyl borate and tripentyl borate and selected from the group consisting of monohexyl borate, dihexyl borate and trihexyl borate. A composition according to claim 1. 9. The composition according to claim 8, wherein the boron compound is boric acid. 10. The following formula: (In the formula, R ⁶ is a hydrocarbyl group having 3 to 18 carbon atoms, M is a metal or a nonmetal, n is a valence of M and Z is oxygen or sulfur, and at least one of Z is sulfur.) The composition according to claim 1, wherein the phosphorus and sulfur components are supplied by the phosphorothioate represented by the formula: 11. The composition according to claim 10, wherein R ⁶ is an alkyl group or an alkylaryl group. 12. R ⁶ is propyl, butyl, pentyl, hexyl, octyl, dodecyl, tetradecyl, octadecyl, butylphenyl, octylphenyl, nonylphenyl, the claims are dodecylphenyl or oleyl group or mixtures thereof, Item 11. The composition according to Item 11. 13. R ⁶ is propanol, isopropanol, butanol, isobutanol, sec-butanol, 4
A composition according to claim 12 which is a group derived from -methyl-2-pentanol, 2-ethylhexanol or mixtures thereof. 14. M is a group IA, IIA or II of the periodic table.
Claim 10 which is a Group B or Group VIII metal.
The composition according to the item. 15. The composition according to claim 14, wherein the metal is lithium, sodium, silver, molybdenum, calcium, zinc, cadmium or gold. 16. A composition according to claim 10 wherein M is a group derived from vinyl acetate, butyl vinyl ether, propylene oxide, 1,2-epoxydodecane or nitrogen containing compounds. 17. The following compounds: (1) dihydrocarbyl phosphite containing 2 to 6 carbon atoms in each hydrocarbyl group, mixtures of such phosphites, or 4 to 4 carbon atoms in each hydrocarbyl group.
A phosphoric acid ester containing 20 and (2) a combination of sulfide selected from the group consisting of isobutylene sulfide, dibenzyl disulfide, terpene sulfide, phosphorodithionyl disulfide and jojoba oil sulfide to give phosphorus and sulfur components. The composition of claim 1 supplied. 18. The method according to claim 17, wherein the phosphite is a dibutyl, dihexyl, dioctyl or didecyl ester of phosphite, or a mixture thereof.
The composition according to the item. 19. The composition according to claim 17, wherein the phosphoric acid ester acid is a tributyl, tridecyl or tricresyl ester of phosphoric acid or a mixture thereof. 20. The amine is N-oleyl-1,3-propylenediamine, the boron compound is boric acid, and the thickener is 12-hydroxystearate.
Phosphorus and sulfur C ₃ -C ₆ alkyl phosphorodithioate compositions ranging first claim of claims supplied by dithio zinc. 21. The amine is N-beef tallow-1,3-propylenediamine, the boron compound is boric acid, the thickener 12-hydroxystearate lithium, and the phosphorus and sulfur components are C ₃ -C ₆ alkyl phosphorodithiones. A composition according to claim 1 provided by zincate. 22. The composition of claim 1 wherein the grease vehicle is mineral oil. 23. The composition of claim 1 wherein the grease vehicle is a synthetic oil. 24. The composition of claim 1 wherein the grease vehicle is a mixture of mineral oil and synthetic oil. 25. A boron compound, a metaborate ester,
Boric acid, boron oxide and the following formula: in ^{(R 5 O) yB (OH} ) z ( wherein, y is 1 to 3, z is 0 to 2, y and z
Is 3; R ⁵ represents an alkyl group having 1 to 6 carbon atoms), and the composition according to claim 1, selected from the group consisting of alkyl borate represented by the formula: 26. The composition of claim 1 wherein the total amount of thickening agent is from about 3% to about 20% by weight of the total grease composition. 27. A method for improving the dropping point of a grease composition
And the grease composition comprises the following i) and ii):
I) the grease vehicle that occupies most of it; ii) the following formula:Manufactured by reacting an amine represented by
About 0.01% to about 10% by weight of the reaction product (formula
Where x is 0 to 2 and R, R¹, R³And R^FourIs hydrogen,
Or a hydrocarbyl group having 1 to 30 carbon atoms, 2 to 2 carbon atoms
4 hydroxyalkyl group, C6-20 polyal
The latter having a coxylated group or sulfur or additional oxygen
And R and R¹, R³And R^FourLess of
One is a group other than hydrogen, and R is 2 is C₂~ C_FourThe al
A xylene group); the process comprises adding at least 15% by weight of the grease composition.
With a thickener containing a hydroxyl-containing soap thickener
And concentrate. 28. The grease composition further comprises a compound containing both phosphorus and sulfur or a mixture of a phosphorus-containing compound and a sulfur-containing compound in an amount of about 0.01 wt.% To about 10 wt. The method of claim 27, wherein sulfur is supplied.