Patent DE409548C successfully refreshed from Google Patents.
Patent US4307211A successfully refreshed from Google Patents.
US4307211A
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Preparation of an ethylene-ethyl acrylate-acrylic acid terpolymer
Assignee: Union Carbide Corp
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Filing: 1977-10-31
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Granted: 1981-12-22
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Expires: 1997-10-31
Abstract
Abstract Preparation of an ethylene-ethyl acrylate-acrylic acid terpolymer by hydrolysis of ethylene-ethyl acrylate copolymer in an inert atmosphere at a temperature of from about 150° C. to about 450° C. and a pressure of from about 3 to about 300 kg/cm 2 .
Inventors
- 👤 Yukio Ito
- 👤 Kazuyuki Isobe
- 👤 Kiroku Tsukada
- 👤 Fumio Tsuruwaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:40
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/12; C08F210/00; C08F210/02; C08F2800/00; C08F2800/10; C08F2810/00; C08F2810/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
A process for preparing ethylene-ethyl acrylate-acrylic acid terpolymer having a melt index of from 50 to about 2000 decigrams per minute from ethylene-ethyl acrylate copolymer having a melt index of from 0.1 to about 300 decigrams per minute, by hydrolyzing the ethylene-ethyl acrylate copolymer in an inert atmosphere at a temperature of from about 150° C. to about 450° C. and a pressure of from about 3 to about 300 kg/cm 2 .
Claim 2
Dependent Claim
73 words
A process for preparing ethylene-ethyl acrylate-acrylic acid terpolymer having a melt index of from 50 to about 2000 decigrams per minute from ethylene-ethyl acrylate copolymer having a melt index of from 0.1 to about 300 decigrams per minute, by hydrolyzing the ethylene-ethyl acrylate copolymer in an inert atmosphere at a temperature of from about 150° C. to about 450° C. and a pressure of from about 3 to about 300 kg/cm 2 .
Claim 3
Dependent Claim
24 words
A process as claimed in claim 1, wherein the ethylene-ethyl acrylate copolymer has a melt index of from 20 to 300 decigrams per minute.
Claim 4
Dependent Claim
24 words
A process as claimed in claim 1, wherein the ethylene-ethyl acrylate copolymer has an ethyl acrylate content of 1 to about 16 mole percent.
Claim 5
Dependent Claim
21 words
A process as claimed in claim 3, wherein the ethylene ethyl acrylate content is about 3 to about 11 mole percent.
Claim 6
Dependent Claim
22 words
A process as claimed in claim 1, wherein from 0.1 to about 99 weight percent of water is used in the hydrolysis.
Claim 7
Dependent Claim
19 words
A process as claimed in claim 5, wherein about 5 to about 80 weight percent of water is used.
Claim 8
Dependent Claim
16 words
A process as claimed in claim 5, wherein the water is in the form of steam.
Claim 9
Dependent Claim
17 words
A process as claimed in claim 1, wherein the temperature is about 250° to about 450° C.
Claim 10
Dependent Claim
19 words
A process as claimed in claim 1, wherein the pressure is about 20 to about 250 kg/cm 2 .
References Cited (Backward Citations)
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Cited
US3970626A
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US3249570A
Cited
US3557070A
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US3674761A
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US3681313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |