US4024325A
Expired / Lapsed
US
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Process for preparing ethylene-carbon monoxide copolymers using peroxyesters having a ten-hour half-life lower than 60° C
Assignee: Millennium Petrochemicals Inc
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Filing: 1975-10-14
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Granted: 1977-05-17
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Expires: 1995-10-14
Abstract
Abstract High melting ethylene-carbon monoxide copolymers are prepared by copolymerizing ethylene and carbon monoxide at relatively low temperatures and pressures using a peroxy ester of an organic acid having a ten hour half-life temperature of about 60° C. or less, when determined in a 0.2 M solution in benzene, as catalyst. The preferred catalyst is t-butyl peroxypivalate. The reaction is preferably carried out in the presence of dioxane as solvent and t-butyl peroxypivalate as catalyst.
Inventors
- 👤 Donald E. Hudgin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:20
CPC Classifications
C; C08; C08G; C08G67/00; C08G67/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
46 words
An improved process for preparing ethylene-carbon monoxide copolymers comprising reacting a mixture of ethylene and carbon monoxide in the presence of a peroxy ester of an organic acid having a ten hour half-life temperature, determined in 0.2 M benzene solution, not greater than about 60° C.
Claim 2
Dependent Claim
46 words
An improved process for preparing ethylene-carbon monoxide copolymers comprising reacting a mixture of ethylene and carbon monoxide in the presence of a peroxy ester of an organic acid having a ten hour half-life temperature, determined in 0.2 M benzene solution, not greater than about 60° C.
Claim 3
Dependent Claim
36 words
The process of claim 1 wherein the peroxy ester of an organic acid is present in an amount effective to produce the desired result up to about 5%, based on the total weight of monomeric components.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein the reaction is carried out at a pressure of about 300 to 2000 psig.
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein the reaction is carried out at a pressure of about 500 to 1500 psig.
Claim 6
Dependent Claim
33 words
The process of claim 1 wherein the reaction is carried out in the presence of a solvent free of substituents which interfere with the desired reaction between the ethylene and the carbon monoxide.
Claim 7
Dependent Claim
12 words
The process of claim 5 wherein the solvent is a cyclic ether.
Claim 8
Dependent Claim
27 words
The process of claim 1 wherein at least one additional ethylenically unsaturated monomer polymerizable with ethylene, carbon monoxide or mixtures thereof is added to the reaction mixture.
Claim 9
Dependent Claim
20 words
The process of claim 1 wherein the reaction is carried out at a temperature of about 20° to 100° C.
Claim 10
Dependent Claim
22 words
The process of claim 1 wherein the ratio of ethylene to carbon monoxide in the reaction mixture is about 1:4 to 4:1.
Claim 11
Dependent Claim
16 words
The process of claim 1 wherein the peroxy ester of an organic acid is t-butyl peroxypivalate.
Claim 12
Dependent Claim
55 words
An improved process for preparing ethylene-carbon monoxide copolymers comprising reacting a mixture of ethylene and carbon monoxide in dioxane in the presence of 0.005 to 5.0%, based on the total weight of monomeric components, of t-butyl peroxypivalate at a pressure of about 300 to 2000 psig and a temperature of about 20 to 100° C.
Claim 13
Dependent Claim
55 words
An improved process for preparing ethylene-carbon monoxide copolymers comprising reacting a mixture of ethylene and carbon monoxide in dioxane in the presence of 0.005 to 5.0%, based on the total weight of monomeric components, of t-butyl peroxypivalate at a pressure of about 300 to 2000 psig and a temperature of about 20 to 100° C.
Claim 14
Dependent Claim
19 words
The process of claim 11 wherein the reaction is carried out in a mixture of dioxane and another diluent.
Claim 15
Dependent Claim
32 words
The process of claim 11 wherein up to about 45% of the total weight of monomer present in the reaction mixture is an ethylenically unsaturated monomer copolymerizable with ethylene and/or carbon monoxide.
Claim 16
Dependent Claim
32 words
The process of claim 11 wherein the t-butyl peroxypivalate is present in an amount of about 0.1 to 2%, based on the total weight of polymerizable monomer present in the reaction mixture.
Claim 17
Dependent Claim
20 words
The process of claim 11 wherein the reaction is carried out at a pressure of about 500 to 1500 psig.
Claim 18
Dependent Claim
20 words
The process of claim 11 wherein the reaction is carried out at a temperature of about 20° to 70° C.
Claim 19
Dependent Claim
22 words
The process of claim 11 wherein the ratio of ethylene to carbon monoxide in the reaction mixture is about 1:4 to 4:1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |