CA1293243C - Lubricant composition containing two heavy metal containing compounds and a phosphorus compound and process of preparing the same - Google Patents
Lubricant composition containing two heavy metal containing compounds and a phosphorus compound and process of preparing the sameInfo
- Publication number
- CA1293243C CA1293243C CA000541296A CA541296A CA1293243C CA 1293243 C CA1293243 C CA 1293243C CA 000541296 A CA000541296 A CA 000541296A CA 541296 A CA541296 A CA 541296A CA 1293243 C CA1293243 C CA 1293243C
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- CA
- Canada
- Prior art keywords
- heavy metal
- lubricant composition
- metal containing
- lubricant
- containing organic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
ICI-Am D.1854 ABSTRACT
An improved lubricant is described which contains mineral or synthetic oils and lubricant concentrates, and as additives contains two heavy metal compounds as well as a metal and sulfur-free phosphorus compound. The synthesis of the lubricants is also described.
An improved lubricant is described which contains mineral or synthetic oils and lubricant concentrates, and as additives contains two heavy metal compounds as well as a metal and sulfur-free phosphorus compound. The synthesis of the lubricants is also described.
Description
\
93;~ ~3 ICI_Am D.1854 LUBRICA~T COMPOSITION CONTAINING TWO HEAVY METAL
CONTAINING COMPOUNDS AND A PHOSPHORUS COMPOUND
AND PROCESS OF PREPARING THE SAME
Baekground of the Invention The invention concerns a lubricant con-sis~ing essentially of mineral or synthe~ic oils or lubricant concentrate and additives in the form of heavy metal organic compounds and phosphorus com-pounds.
I~ is ~nown that to produce a lubricant, mineral or synthetic o;ls can be provided with addi-tives in order to increase their loadability and oxidation resistsncep improve their adherence and limit their heating from fr~ctlon. Lubricants of the type mentioned above are described in German patent 21 08 780. However, it has been fo~lnd that these known lubricants can still be further improved in terms of abrasion and area pressure.
Detailed Description of the Invention The purpose of the invention is to create a lubricant displayin~ better abrasion values and penmi~ting a hi~her ~rea pressure.
This problem is solved according to the invention by the fact that compounds of two heavy metal~ as well as a metal- and sulfur-free organic phosphorus compound a~e present as additives.
The lubricant according to the invention can be formulated on the bssis of ordinary lubricating oils ~932D~3 or lubricant concentrates, e.g. from mineral or synthetic oils such as paraffin oils. Especi~lly suitable are mineral oils having viscosities between 40 and 1500 centistokes at 40C. Synthetic oils, such as polyalphaolefins and polyglycols and esters, with viscosities between 40 and 1500 centistokes at 40C
are also especially suitable. The lubricating compo-sition typically contains between 80-97 percent by weight of oil or lubricant concentrate.
Two heavy metal compounds, preferably from the group of compounds of molybdenum, zinc, tungsten, and vanadium are incorporated in the Lubricant accord-ing to the invention. Preferred combinations are compounds of molybdenum and zinc, tungsten and zinc, and vanadium and zinc.
The anions of the two heavy metal compounds are selected such that the compounds are soluble in the lubricating oil or lubricant concentrate used.
Preferred anions are dithiophosphate, in which the oxygen atoms are preferably esterified with alkyl, aryl, and/or aralkyl groups.
Examples of such alkyl groups are those with 1 to 18 carbon atoms, longer-chained straight or branched alkyl groups with 6 to 18 carbon atoms being preferred. For example, alkyl groups with 8 carbon atoms, such as the 2-ethylhexyl groups, may be used.
Examples of aryl groups that may be used are phenyl groups and naphthyl groups which may be substi-tuted by straight or branched alkyl groups, especially with 1 to 6 carbon atoms.
Examples of aralkyl groups are the above-mentioned alkyl groups which are substituted by the above-mentioned aryl groups.
Specific examples of the heavy metal com-pounds that may be used are molybdenum and zinc 93;~3 dialkyldithiophosphoric acid esters, e.g. molybdenum and zinc-di-2-ethylhexyl-dithiophosphoric acid esters;
a combination of the two latter compounds being especially preferred.
The heavy metal compounds may also be present as a dithiocarbamate; molybdenum dithio-carbamate being especially preferred. A favorable composition is represented by molybdenum dithio-carbamate together with a zinc dialkyldithiophosphate, e.g. zinc-di-2-ethylhexyldithiophosphoric acid ester.
The third component according to the in-vention, besides the two heavy metal compounds, is an organic phosphorus compound free of metal and sulfur.
An organic phosphate, especially a trialkyl or triaryl phosphate is especially well suited, examples of alkyl and aryl groups being the alkyl and aryl groups defined above.
Especially preferred as triaryl phosphates are natural phosphates from the distillation of coal tar, such as trixylylphospha~e, tritolylphosphate, tricresylphosphate and especially synthetic phos-phates, such as alkylphenyl phosphates in which the phenyl radical is substituted by 1 to 3 alkyl groups with 1 to 6 carbon atoms, especially with branched alkyl groups with 3 or 4 carbon atoms, such as the isopropyl groups or sec. or tert.butyl group. An especially well suited example is triisopropylphenyl phosphate.
The above-named three constituents ~two heavy metal compounds and metal- and sulfur-free phosphate compounds) are preferably present in weight ratios from 0.1-1.5:0.1-1.5:0.1-1.5, preferably in the weight ratio of about 1:1:1 to each other in the lubrLcant. Their total weight ~sum of the three constituents) in the finished lubricant, preferably amounts to 3 to 10%, especially favorable 3.9 to 9.9%, 1293Z~3 particularly 5.9 to 7.9~, and lies, for example, at about 6.9%.
-Especially preferred compositions contain 3O9 to 9.9 percent by weight, especially ~.9 percent by weight, molybdenum-dithiophosphoric acid ester and/or molybdenum-di~hiocarbamate, together with zinc-di-2-ethylhexyldithio phosphoric acid ester and triisopropylphenylphosphate; the molybdenum, zinc, and phosphate compounds being present in weight ratios of approximately l:l:l.
The lubricant according to the invention may, naturally, contain conventional additives.
Examples of such additives are ordinary chelate formers, which passivate, for example, undesired copper fractions, for example, as well as other ordinary corrosion inhibitors, adhesion improvers based on polymers, e.g. based on polymethacrylate and corresponding viscosity index improvers, as well as ordinary antirusting agents such as barium dinonyl-naphthalene sulfonate, and defoamers.
The lubricant composition of this inventioncan be synthesized by mixing the individual con-stituents. For example, the oils are usually heated between room temperature and about 100C, e.g. about 50C for approximately 2 hours. The additives are then sequentially added to the heated oils approxi-mately 20 minutes apart under thP referenced elevated temperatures.
3~3 .;
:`
~ EXAMPLES
., .
The following examples serve to illustrate the synthesis and composition of the lubricants according to the invention.
Example 1 ::
A lubricant was produced from the following components:
Component 1 Mineral oil component comprising 290.7 kg of HR80 and 624.3 kg of Brightstock 406 915.0 kg 2 Copper passivator (commercial product Reomet 38) 1.0 kg 3 Triarylphosphate (isopropyl phenylphosphate) (commercia'l product Refos 95) 23.0 kg 4 Molybdenum-di-2-ethylhexyl-dithiophosphoric acid ester (commercial product Molyvan L) 23.0 kg 2-ethylhexyl zinc dithio-phosphate (commercial product RC3180) 23.0 kg 6 Polymethacrylate (for lower-ing the flow point) (com-mercial product Hitec E 603) 5.0 kg 7 Bariumdinonyl naphthalene-sulfonate (corrosion inhibitor, commercial product Na-Sul BSN) 10.0 kg 8 DC 200-500 defoamer (commercial product of ~ow Corning) 50.0 g The mineral oil component was heated to approximately ; 45 50C for approximately 2 hours. To the vessel was then added in increments of 20 minutes, Component nos 2, 3, 4, 5, 6, 7 and 8 respectively. Upon the ~293~3 :
addition of each reactant, the ingredients were heated to approximately 50~C.
xample 2 :~ .
Example 1 was repeated, but this time the molybdenum-di-2-ethylhexyl-dithiophosphate was re-placed by molybdenum-dithiocarbamate.
Measurements with a vibrating friction-abrasion machine (SRV machine~ showed that the lubri-cants according to the invention improved the abrasion values and improved the area pressure.
In addition, sperm oil and terpene are no lvnger required as additives, which fact makes a not insubstantial contribution to improving the abrasion values and area pressure.
93;~ ~3 ICI_Am D.1854 LUBRICA~T COMPOSITION CONTAINING TWO HEAVY METAL
CONTAINING COMPOUNDS AND A PHOSPHORUS COMPOUND
AND PROCESS OF PREPARING THE SAME
Baekground of the Invention The invention concerns a lubricant con-sis~ing essentially of mineral or synthe~ic oils or lubricant concentrate and additives in the form of heavy metal organic compounds and phosphorus com-pounds.
I~ is ~nown that to produce a lubricant, mineral or synthetic o;ls can be provided with addi-tives in order to increase their loadability and oxidation resistsncep improve their adherence and limit their heating from fr~ctlon. Lubricants of the type mentioned above are described in German patent 21 08 780. However, it has been fo~lnd that these known lubricants can still be further improved in terms of abrasion and area pressure.
Detailed Description of the Invention The purpose of the invention is to create a lubricant displayin~ better abrasion values and penmi~ting a hi~her ~rea pressure.
This problem is solved according to the invention by the fact that compounds of two heavy metal~ as well as a metal- and sulfur-free organic phosphorus compound a~e present as additives.
The lubricant according to the invention can be formulated on the bssis of ordinary lubricating oils ~932D~3 or lubricant concentrates, e.g. from mineral or synthetic oils such as paraffin oils. Especi~lly suitable are mineral oils having viscosities between 40 and 1500 centistokes at 40C. Synthetic oils, such as polyalphaolefins and polyglycols and esters, with viscosities between 40 and 1500 centistokes at 40C
are also especially suitable. The lubricating compo-sition typically contains between 80-97 percent by weight of oil or lubricant concentrate.
Two heavy metal compounds, preferably from the group of compounds of molybdenum, zinc, tungsten, and vanadium are incorporated in the Lubricant accord-ing to the invention. Preferred combinations are compounds of molybdenum and zinc, tungsten and zinc, and vanadium and zinc.
The anions of the two heavy metal compounds are selected such that the compounds are soluble in the lubricating oil or lubricant concentrate used.
Preferred anions are dithiophosphate, in which the oxygen atoms are preferably esterified with alkyl, aryl, and/or aralkyl groups.
Examples of such alkyl groups are those with 1 to 18 carbon atoms, longer-chained straight or branched alkyl groups with 6 to 18 carbon atoms being preferred. For example, alkyl groups with 8 carbon atoms, such as the 2-ethylhexyl groups, may be used.
Examples of aryl groups that may be used are phenyl groups and naphthyl groups which may be substi-tuted by straight or branched alkyl groups, especially with 1 to 6 carbon atoms.
Examples of aralkyl groups are the above-mentioned alkyl groups which are substituted by the above-mentioned aryl groups.
Specific examples of the heavy metal com-pounds that may be used are molybdenum and zinc 93;~3 dialkyldithiophosphoric acid esters, e.g. molybdenum and zinc-di-2-ethylhexyl-dithiophosphoric acid esters;
a combination of the two latter compounds being especially preferred.
The heavy metal compounds may also be present as a dithiocarbamate; molybdenum dithio-carbamate being especially preferred. A favorable composition is represented by molybdenum dithio-carbamate together with a zinc dialkyldithiophosphate, e.g. zinc-di-2-ethylhexyldithiophosphoric acid ester.
The third component according to the in-vention, besides the two heavy metal compounds, is an organic phosphorus compound free of metal and sulfur.
An organic phosphate, especially a trialkyl or triaryl phosphate is especially well suited, examples of alkyl and aryl groups being the alkyl and aryl groups defined above.
Especially preferred as triaryl phosphates are natural phosphates from the distillation of coal tar, such as trixylylphospha~e, tritolylphosphate, tricresylphosphate and especially synthetic phos-phates, such as alkylphenyl phosphates in which the phenyl radical is substituted by 1 to 3 alkyl groups with 1 to 6 carbon atoms, especially with branched alkyl groups with 3 or 4 carbon atoms, such as the isopropyl groups or sec. or tert.butyl group. An especially well suited example is triisopropylphenyl phosphate.
The above-named three constituents ~two heavy metal compounds and metal- and sulfur-free phosphate compounds) are preferably present in weight ratios from 0.1-1.5:0.1-1.5:0.1-1.5, preferably in the weight ratio of about 1:1:1 to each other in the lubrLcant. Their total weight ~sum of the three constituents) in the finished lubricant, preferably amounts to 3 to 10%, especially favorable 3.9 to 9.9%, 1293Z~3 particularly 5.9 to 7.9~, and lies, for example, at about 6.9%.
-Especially preferred compositions contain 3O9 to 9.9 percent by weight, especially ~.9 percent by weight, molybdenum-dithiophosphoric acid ester and/or molybdenum-di~hiocarbamate, together with zinc-di-2-ethylhexyldithio phosphoric acid ester and triisopropylphenylphosphate; the molybdenum, zinc, and phosphate compounds being present in weight ratios of approximately l:l:l.
The lubricant according to the invention may, naturally, contain conventional additives.
Examples of such additives are ordinary chelate formers, which passivate, for example, undesired copper fractions, for example, as well as other ordinary corrosion inhibitors, adhesion improvers based on polymers, e.g. based on polymethacrylate and corresponding viscosity index improvers, as well as ordinary antirusting agents such as barium dinonyl-naphthalene sulfonate, and defoamers.
The lubricant composition of this inventioncan be synthesized by mixing the individual con-stituents. For example, the oils are usually heated between room temperature and about 100C, e.g. about 50C for approximately 2 hours. The additives are then sequentially added to the heated oils approxi-mately 20 minutes apart under thP referenced elevated temperatures.
3~3 .;
:`
~ EXAMPLES
., .
The following examples serve to illustrate the synthesis and composition of the lubricants according to the invention.
Example 1 ::
A lubricant was produced from the following components:
Component 1 Mineral oil component comprising 290.7 kg of HR80 and 624.3 kg of Brightstock 406 915.0 kg 2 Copper passivator (commercial product Reomet 38) 1.0 kg 3 Triarylphosphate (isopropyl phenylphosphate) (commercia'l product Refos 95) 23.0 kg 4 Molybdenum-di-2-ethylhexyl-dithiophosphoric acid ester (commercial product Molyvan L) 23.0 kg 2-ethylhexyl zinc dithio-phosphate (commercial product RC3180) 23.0 kg 6 Polymethacrylate (for lower-ing the flow point) (com-mercial product Hitec E 603) 5.0 kg 7 Bariumdinonyl naphthalene-sulfonate (corrosion inhibitor, commercial product Na-Sul BSN) 10.0 kg 8 DC 200-500 defoamer (commercial product of ~ow Corning) 50.0 g The mineral oil component was heated to approximately ; 45 50C for approximately 2 hours. To the vessel was then added in increments of 20 minutes, Component nos 2, 3, 4, 5, 6, 7 and 8 respectively. Upon the ~293~3 :
addition of each reactant, the ingredients were heated to approximately 50~C.
xample 2 :~ .
Example 1 was repeated, but this time the molybdenum-di-2-ethylhexyl-dithiophosphate was re-placed by molybdenum-dithiocarbamate.
Measurements with a vibrating friction-abrasion machine (SRV machine~ showed that the lubri-cants according to the invention improved the abrasion values and improved the area pressure.
In addition, sperm oil and terpene are no lvnger required as additives, which fact makes a not insubstantial contribution to improving the abrasion values and area pressure.
Claims (12)
1. A lubricant composition comprising:
A. between 80 and 97 percent by weight of a lubricant selected from the group consisting of mineral oil, synthetic oil and a lubricant concentrate;
B. first and second heavy metal containing organic compounds; and C. an organic phosphorus compound free of metal and sulfur.
A. between 80 and 97 percent by weight of a lubricant selected from the group consisting of mineral oil, synthetic oil and a lubricant concentrate;
B. first and second heavy metal containing organic compounds; and C. an organic phosphorus compound free of metal and sulfur.
2. A lubricant composition as claimed in Claim 1 wherein said organic phosphorus compound is a triarylphosphate.
3. A lubricant composition as claimed in Claim 1 wherein the two heavy metal compounds are soluble in said oil or concentrate and contain at least one metal selected from the group consisting of molybdenum, zinc, tungsten, and vanadium.
4. A lubricant composition as claimed in Claim 3 wherein the two heavy metal containing organic compounds are dithiophosphates having an oxygen atom esterified with at least one alkyl, aryl or aralkyl group
5. A lubricant composition as claimed in Claim 4 wherein the two heavy metal compounds are molybdenum dithiophosphate and zinc dithiophosphate.
6. A lubricant composition as claimed in Claim 1 wherein the first heavy metal containing organic compound, the second heavy metal containing organic compound and organic phosphorus compound are in the weight ratio of 0.5 - 1.5: 0.5 - 1.5: 0.5 -1.5.
7. A lubricant composition as claimed in Claim 6 wherein said weight ratio is about 1:1:1.
8. A lubricant composition as claimed in Claim 6 wherein the total weight of said first heavy metal containing organic compound, second heavy metal containing organic compound and organic phosphorus compound in said lubricant composition is between 3 to 10 percent by weight.
9. A lubricant composition as claimed in Claim 1 wherein at least one of the heavy metal containing organic compounds is a dithiocarbamate.
10. A lubricant composition as claimed in Claim 9 wherein at least one of the heavy metal containing organic compounds is molybdenum dithio-carbamate.
11. A lubricant composition as claimed in Claim 10 wherein the two heavy metal containing organic compounds are molybdenum dithiocarbamate and zinc dithiophosphate.
12. A process for producing a lubricant composition which comprises heating in a vessel a lubricant selected from mineral oil, synthetic oil, and a lubricant concentrate to a temperature between 25° C and 100° C, stirring into said vessel two heavy metal containing organic compounds and an organic phosphorus compound free of metal and sulfur until dissolution is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000541296A CA1293243C (en) | 1987-07-03 | 1987-07-03 | Lubricant composition containing two heavy metal containing compounds and a phosphorus compound and process of preparing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000541296A CA1293243C (en) | 1987-07-03 | 1987-07-03 | Lubricant composition containing two heavy metal containing compounds and a phosphorus compound and process of preparing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1293243C true CA1293243C (en) | 1991-12-17 |
Family
ID=4136029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000541296A Expired - Lifetime CA1293243C (en) | 1987-07-03 | 1987-07-03 | Lubricant composition containing two heavy metal containing compounds and a phosphorus compound and process of preparing the same |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1293243C (en) |
-
1987
- 1987-07-03 CA CA000541296A patent/CA1293243C/en not_active Expired - Lifetime
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