Patent US3961976A successfully refreshed from Google Patents.
Patent US4011380A successfully refreshed from Google Patents.
US4011380A
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Oxidation of polymers in presence of benzene sulfonic acid or salt thereof
Assignee: Ethyl Corp
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Filing: 1975-12-05
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Granted: 1977-03-08
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Expires: 1995-12-05
Abstract
Abstract This invention provides a process for the oxidation of copolymers of ethylene and olefinic monomers in the temperature range of from about -40° F to about 800° F. The oxidation is carried out in the presence of about 0.05 weight percent to about 1.0 weight percent based on copolymer/oil solution, of an oil soluble benzene sulfonic acid or salt thereof. These benzene sulfonic acids or salts thereof affect the rate of the oxidation reaction and/or the color of the oxidized product or amine reaction products thereof.
Inventors
- 👤 Charles T. West
- 👤 George S. Culbertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:31
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F8/32
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
52 words
The process of oxidizing copolymers of ethylene and olefinically unsaturated monomers in the temperature range of from about -40° F. to about 800° F. in the presence of from about 0.01 weight percent to about 5.0 weight percent based on copolymer/oil solution, of an oil soluble benzene sulfonic acid or salt thereof.
Claim 2
Dependent Claim
52 words
The process of oxidizing copolymers of ethylene and olefinically unsaturated monomers in the temperature range of from about -40° F. to about 800° F. in the presence of from about 0.01 weight percent to about 5.0 weight percent based on copolymer/oil solution, of an oil soluble benzene sulfonic acid or salt thereof.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein the oxidation is an air oxidation conducted in the temperature range of from about 100° F. to about 800° F.
Claim 4
Dependent Claim
35 words
The process of claim 1 wherein the oxidation is conducted in the presence of about 0.10 to about 1.0 weight percent based on copolymer/oil solution, of an oil soluble benzene sulfonic acid or salt thereof.
Claim 5
Dependent Claim
43 words
The process of claim 1 wherein the benzene sulfonic acid or salt thereof has the formula ##STR2## where R is hydrogen, alkyl or hydroxy, chloro or bromo hydrocarbyl, X is hydrogen, magnesium, calcium, sodium, or amine and n is an integer of 1-2.
Claim 6
Dependent Claim
33 words
The process of claim 4 wherein R is an alkyl group made by polymerizing C 2 -C 6 olefins and having a molecular weight in the range of about 80 to about 100,000.
Claim 7
Dependent Claim
14 words
The process of claim 1 wherein a copolymer of ethylene and propylene is oxidized.
Claim 8
Dependent Claim
20 words
The process of claim 1 wherein the copolymer has a number average molecular weight from about 20,000 to about 70,000.
Claim 9
Dependent Claim
24 words
The process of claim 2 wherein the air oxidation is conducted in the temperature range of from about 100° F to about 400° F.
Claim 10
Dependent Claim
24 words
The process of claim 5 wherein R is an alkyl group having a molecular weight in the range of about 80 to about 1000.
Claim 11
Dependent Claim
11 words
The process of claim 1 wherein an ethylene-propylene-diene copolymer is oxidized.
Claim 12
Dependent Claim
84 words
A process for making a lubricating oil viscosity improver which comprises first oxidizing copolymers of ethylene and olefinically unsaturated monomers in the temperature range of from about -40° F. to about 800° F. in the presence of from about 0.01 weight percent to about 5.0 weight percent based on copolymer/oil solution, of an oil soluble benzene sulfonic acid or salt thereof and then reacting said oxidized copolymer with primary or secondary amine or polyamine so that a nitrogen containing, viscosity improving material is formed.
Claim 13
Dependent Claim
84 words
A process for making a lubricating oil viscosity improver which comprises first oxidizing copolymers of ethylene and olefinically unsaturated monomers in the temperature range of from about -40° F. to about 800° F. in the presence of from about 0.01 weight percent to about 5.0 weight percent based on copolymer/oil solution, of an oil soluble benzene sulfonic acid or salt thereof and then reacting said oxidized copolymer with primary or secondary amine or polyamine so that a nitrogen containing, viscosity improving material is formed.
Claim 14
Dependent Claim
26 words
The process of claim 11 wherein the oxidation is an air oxidation conducted in the temperature range of from about 100° F. to about 800° F.
Claim 15
Dependent Claim
35 words
The process of claim 11 wherein the oxidation is conducted in the presence of about 0.10 to about 1.0 weight percent based on copolymer/oil solution, of an oil soluble benzene sulfonic acid or salt thereof.
Claim 16
Dependent Claim
43 words
The process of claim 11 wherein the benzene sulfonic acid or salt thereof has the formula ##STR3## where R is hydrogen, alkyl or hydroxy, chloro or bromo hydrocarbyl, X is hydrogen, magnesium, calcium, sodium, or amine and n is an integer of 1-2.
Claim 17
Dependent Claim
33 words
The process of claim 14 wherein R is an alkyl group made by polymerizing C 2 -C 6 olefins and having a molecular weight in the range of about 80 to about 100,000.
Claim 18
Dependent Claim
14 words
The process of claim 11 wherein a copolymer of ethylene and propylene is oxidized.
Claim 19
Dependent Claim
20 words
The process of claim 11 wherein the copolymer has a number average molecular weight from about 20,000 to about 70,000.
Claim 20
Dependent Claim
24 words
The process of claim 12 wherein the air oxidation is conducted in the temperature range of from about 100° F to about 400° F.
Claim 21
Dependent Claim
24 words
The process of claim 15 wherein R is an alkyl group having a molecular weight in the range of about 80 to about 1000.
Claim 22
Dependent Claim
11 words
The process of claim 11 wherein an ethylene-propylene-diene copolymer is oxidized.
Claim 23
Dependent Claim
16 words
The process of claim 11 wherein the oxidized polymer is reacted with formaldehyde and a polyamine.
References Cited (Backward Citations)
US3046260A
Cited
US3864268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |