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US4466895A
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Metal salts of lower dialkylphosphorodithioic acids
Assignee: Lubrizol Corp
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Filing: 1983-06-27
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Granted: 1984-08-21
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Expires: 2003-06-27
Abstract
Abstract Certain metal salts of one or more dialkylphosphorodithioic acids are disclosed wherein (A) the alkyl groups each contain from two to four carbon atoms and at least one alkyl group is a butyl group, (B) the total number of carbon atoms per phosphorus atoms is less than 8, (C) from about 30 to 90 mole percent of the alkyl groups are primary alkyl groups, (D) from about 10 to 70 mole percent of the alkyl groups are secondary alkyl groups, and (E) the metal salt is a zinc, copper or iron salt, mixtures thereof, or a mixture of calcium salt and one or more of said metal salts; provided that when only 2 alkyl groups are present, from about 30 to 80 mole percent of the alkyl groups are n-butyl groups, from about 20 to 70 mole percent of the said alkyl groups are isopropyl groups. These metal salts are oil-soluble and are useful as antioxidants and anti-wear agents particularly in lubricating oil compositions.
Inventors
- 👤 Calvin W. Schroeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:32
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/17; C10; C10M; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M2205/00; C10M2205/06; C10M2207/00; C10M2207/28; C10M2207/287; C10M2207/289; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/086; C10M2209/10; C10M2209/103; C10M2209/104; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/02; C10M2217/024; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/04; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/14; C10N2010/16
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
144 words
A metal salt of one or more dialkylphosphorodithioic acids wherein (A) the alkyl groups each contain from two to four carbon atoms and at least one alkyl group is a butyl group, (B) the total number of carbon atoms per phosphorus atom is less than 8, (C) from about 30 to 90 mole percent of the alkyl groups are primary alkyl groups, (D) from about 10 to 70 mole percent of the alkyl groups are secondary alkyl groups, and (E) the metal salt is a zinc, copper or iron salt, mixtures thereof, or a mixture of calcium salt and one or more of said metal salts; provided that when only 2 alkyl groups are present, from about 30 to 80 mole percent of the alkyl groups are n-butyl groups, from about 20 to 70 mole percent of the said alkyl groups are isopropyl groups.
Claim 2
Dependent Claim
144 words
A metal salt of one or more dialkylphosphorodithioic acids wherein (A) the alkyl groups each contain from two to four carbon atoms and at least one alkyl group is a butyl group, (B) the total number of carbon atoms per phosphorus atom is less than 8, (C) from about 30 to 90 mole percent of the alkyl groups are primary alkyl groups, (D) from about 10 to 70 mole percent of the alkyl groups are secondary alkyl groups, and (E) the metal salt is a zinc, copper or iron salt, mixtures thereof, or a mixture of calcium salt and one or more of said metal salts; provided that when only 2 alkyl groups are present, from about 30 to 80 mole percent of the alkyl groups are n-butyl groups, from about 20 to 70 mole percent of the said alkyl groups are isopropyl groups.
Claim 3
Dependent Claim
38 words
The metal salt of claim 1 wherein from about 40 to 70 mole percent of the alkyl groups are primary alkyl groups and from about 30 to 60 mole percent of the alkyl groups are secondary alkyl groups.
Claim 4
Dependent Claim
16 words
The metal salt of claim 1 wherein there are present at least three different alkyl groups.
Claim 5
Dependent Claim
13 words
The metal salt of claim 1 wherein there are three different alkyl groups.
Claim 6
Dependent Claim
11 words
The metal salt of claim 4 wherein the metal is zinc.
Claim 7
Dependent Claim
19 words
The metal salt of claim 1 wherein the salt is a neutral salt, basic salt, or a mixture thereof.
Claim 8
Dependent Claim
68 words
A metal salt of one or more dialkylphosphorodithioic acids wherein (A) from about 30 to 80 mole percent of the alkyl groups are n-butyl groups, (B) from about 20 to 70 mole percent of the alkyl groups are isopropyl groups, and (C) the metal salt is a zinc, copper, or iron salt, mixtures thereof, or a mixture of calcium salt and one or more of said metal salt.
Claim 9
Dependent Claim
68 words
A metal salt of one or more dialkylphosphorodithioic acids wherein (A) from about 30 to 80 mole percent of the alkyl groups are n-butyl groups, (B) from about 20 to 70 mole percent of the alkyl groups are isopropyl groups, and (C) the metal salt is a zinc, copper, or iron salt, mixtures thereof, or a mixture of calcium salt and one or more of said metal salt.
Claim 10
Dependent Claim
36 words
The metal salt of claim 7 wherein from about 40 to 70 mole percent of the alkyl groups are n-butyl groups and from about 30 to 60 mole percent of the alkyl groups are isopropyl groups.
Claim 11
Dependent Claim
11 words
The metal salt of claim 7 wherein the metal is zinc.
Claim 12
Dependent Claim
28 words
The metal salt of claim 7 wherein the alkyl groups are a mixture of about 50 mole percent of n-butyl groups and 50 mole percent of isopropyl groups.
Claim 13
Dependent Claim
19 words
The metal salt of claim 7 wherein the salt is a neutral salt, basic salt, or a mixture thereof.
Claim 14
Dependent Claim
111 words
A metal salt of one or more dialkylphosphorodithioic acids containing more than two different alkyl groups wherein (A) the alkyl groups each contain from two to four carbon atoms and at least one alkyl group is a butyl group, (B) the total number of carbon atoms per phosphorus atom is less than 8, (C) from about 30to 90 mole percent of the alkyl groups are primary alkyl groups, (D) from about 10 to 70 mole percent of the alkyl groups are secondary groups and (E) the metal salt is a zinc, copper or iron salt, mixtures thereof, or a mixture of calcium salt and one or more of said metal salt.
Claim 15
Dependent Claim
111 words
A metal salt of one or more dialkylphosphorodithioic acids containing more than two different alkyl groups wherein (A) the alkyl groups each contain from two to four carbon atoms and at least one alkyl group is a butyl group, (B) the total number of carbon atoms per phosphorus atom is less than 8, (C) from about 30to 90 mole percent of the alkyl groups are primary alkyl groups, (D) from about 10 to 70 mole percent of the alkyl groups are secondary groups and (E) the metal salt is a zinc, copper or iron salt, mixtures thereof, or a mixture of calcium salt and one or more of said metal salt.
Claim 16
Dependent Claim
36 words
The metal salt of claim 12 wherein about 30 to 80 mole percent of the alkyl groups are primary alkyl groups and from about 20 to 70 mole percent of the alkyl groups are secondary groups.
Claim 17
Dependent Claim
13 words
The metal salt of claim 13 wherein there are three different alkyl groups.
Claim 18
Dependent Claim
21 words
The metal salt of claim 14 wherein the alkyl groups comprise a mixture of isobutyl, secondary butyl and normal propyl groups.
Claim 19
Dependent Claim
19 words
The metal salt of claim 14 wherein the alkyl groups comprise a mixture of n-butyl, isobutyl and isopropyl groups.
Claim 20
Dependent Claim
20 words
The metal salt of claim 14 wherein the alkyl groups comprise a mixture of n-butyl, secondary butyl and ethyl groups.
Claim 21
Dependent Claim
19 words
The metal salt of claim 14 wherein the alkyl groups comprise a mixture of n-butyl, isopropyl and ethyl groups.
Claim 22
Dependent Claim
19 words
The metal salt of claim 12 wherein the salt is a neutral salt, basic salt, or a mixture thereof.
Claim 23
Dependent Claim
26 words
An additive concentrate comprising a substantially inert, normally liquid organic diluent and from about 5 to about 90 percent of the metal salt of claim 1.
Claim 24
Dependent Claim
27 words
An additive concentrate comprising a substantially inert, normally liquid organic diluent and from about 5 to about 90 percent by weight of the composition of claim 7.
Claim 25
Dependent Claim
28 words
An additive concentrate comprising a substantially inert, normally liquid organic diluent and from about 5 to about 90 percent by weight of the metal salt of claim 12.
Claim 26
Dependent Claim
22 words
A lubricant composition comprising a major amount of a lubricating oil and a minor amount of the metal salt of claim 1.
Claim 27
Dependent Claim
22 words
A lubricant composition comprising a major amount of a lubricating oil and a minor amount of the metal salt of claim 7.
Claim 28
Dependent Claim
22 words
A lubricant composition comprising a major amount of a lubricating oil and a minor amount of the metal salt of claim 12.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |