US4399263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modification of ethylene/acrylate/carboxylic polymer
Assignee: EIDP Inc
•
Filing: 1981-12-24
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Granted: 1983-08-16
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Expires: 2001-12-24
Abstract
Abstract Elastomeric ethylene/alkyl acrylate/1,4-butenedioic acid ester copolymers are stabilized against variations in cure characteristics by reaction of such polymers with amines, perferably during isolation of such polymers. In addition, substantial increase in the molecular weight of such polymers is achieved if the amines are di- or polyamines.
Inventors
- 👤 Nicolas Brodoway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08F; C08F8/00; C08F8/30; C08F8/32; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
A process for increasing the hydrolytic stability and uniformity, and optionally increasing the molecular weight of random ethylene/methyl acrylate/1,4-butenedioic acid ester copolymer, said copolymer containing 0.5-10 weight percent 1,4-butenedioic acid ester, 40-62 weight percent methyl acrylate, and 28-59.5 weight percent ethylene, said process comprising heating said copolymer to a temperature of 140°-200° C. for a period of at least five minutes, and then contacting the heated copolymer in which the anhydride content is about 0.01-0.1 mole/kg of said heated copolymer with 0.01-0.1 equivalents of amine per kilogram of polymer wherein the amine consists of carbon, hydrogen and nitrogen atoms and is selected from the group consisting of monamines, polyamino compounds, compounds which generate such monoamines and polyamino compounds upon chemical reaction, and mixtures of the above.
Claim 2
Dependent Claim
126 words
A process for increasing the hydrolytic stability and uniformity, and optionally increasing the molecular weight of random ethylene/methyl acrylate/1,4-butenedioic acid ester copolymer, said copolymer containing 0.5-10 weight percent 1,4-butenedioic acid ester, 40-62 weight percent methyl acrylate, and 28-59.5 weight percent ethylene, said process comprising heating said copolymer to a temperature of 140°-200° C. for a period of at least five minutes, and then contacting the heated copolymer in which the anhydride content is about 0.01-0.1 mole/kg of said heated copolymer with 0.01-0.1 equivalents of amine per kilogram of polymer wherein the amine consists of carbon, hydrogen and nitrogen atoms and is selected from the group consisting of monamines, polyamino compounds, compounds which generate such monoamines and polyamino compounds upon chemical reaction, and mixtures of the above.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein the ethylene/alkyl acrylate/1,4-butenedioic acid ester copolymer is heated to 150°-180° C. for 5-15 minutes.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein the amine is a mixture of mono- and diamines.
Claim 5
Dependent Claim
26 words
The process of claim 1 wherein the amine is selected from the group consisting of dibutylamine, hexamethylenediamine, ethylenediamine, methylenedianiline, diethylenetriamine, tetraethylenepentamine and mixtures of the above.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein the amine is a mixture of hexamethylenediamine and dibutylamine.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein the copolymer is contacted with 0.014-0.02 equivalents of amine per kilogram of polymer.
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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) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |