US3948873A
Expired / Lapsed
US
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Process for preparing carbon monoxide-ethylene copolymers
Assignee: Millennium Petrochemicals Inc
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Filing: 1974-10-10
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Granted: 1976-04-06
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Expires: 1994-10-10
Abstract
Abstract An improved method of preparing ethylene-carbon monoxide copolymers using organic peroxide catalysts comprising carrying out the polymerization in the presence of a small amount of potassium dihydrogen phosphate.
Inventors
- 👤 Donald E. Hudgin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:03
CPC Classifications
C; C08; C08G; C08G67/00; C08G67/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
81 words
In a process for preparing ethylenecarbon monoxide copolymers by reacting a mixture of ethylene and carbon monoxide at a temperature of about 20° to 150°C and a pressure of at least about 300 psig, the improvement comprising carrying out the reaction in the presence of an organic peroxide catalyst present in an amount effective to produce the desired product and 0.1 to 20% of KH 2 PO 4 based on the total weight of monomeric components present in the reaction mixture.
Claim 2
Dependent Claim
81 words
In a process for preparing ethylenecarbon monoxide copolymers by reacting a mixture of ethylene and carbon monoxide at a temperature of about 20° to 150°C and a pressure of at least about 300 psig, the improvement comprising carrying out the reaction in the presence of an organic peroxide catalyst present in an amount effective to produce the desired product and 0.1 to 20% of KH 2 PO 4 based on the total weight of monomeric components present in the reaction mixture.
Claim 3
Dependent Claim
30 words
The process of claim 1 wherein the KH 2 PO 4 is present in an amount of about 1 to 10%, based on the total weight of monomeric components present.
Claim 4
Dependent Claim
26 words
The process of claim 1 wherein the organic peroxide catalyst is an organic acid peroxy ester having a 10 hour halflife not greater than about 60°C.
Claim 5
Dependent Claim
15 words
The process of claim 3 wherein said organic acid peroxy ester is t-butyl peroxy pivalate.
Claim 6
Dependent Claim
35 words
The process of claim 1 wherein the reaction is carried out in the presence of a solvent which is free from 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
29 words
The process of claim 1 wherein at least one additional ethylenically unsaturated monomer which polymerizes with ethylene or carbon monoxide or mixtures thereof is added to the reaction mixture.
Claim 9
Dependent Claim
19 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
21 words
The process of claim 1 wherein the average particle size of the potassium dihydrogen phosphate is less than about 100 mesh.
References Cited (Backward Citations)
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Cited
US3530109A
Cited
US3689460A
Cited
US3694412A
Cited
US3780140A
Cited
US3835123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |