US3925326A
Expired / Lapsed
US
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Alternating copolymers of ethylene/alkyl acrylates/cure-site monomers and a process for their preparation
Assignee: EIDP Inc
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Filing: 1972-03-10
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Granted: 1975-12-09
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Expires: 1992-03-10
Abstract
Abstract An amorphous substantially linear atactic alternating copolymer having a glass transition temperature less than about 0*C., and an inherent viscosity of about 1 to about 6, said copolymer having repeating units of -A-B- wherein A is a unit of at least one C1-C8 alkyl acrylate and cure-site monomer if the cure-site monomer is an acrylic, and B is independently selected from ethylene and cure-site monomers if the cure-site monomer is an Alpha -olefin. These copolymers are prepared by reacting monomers in the presence of boron trifluoride and a free radical initiator and, when cured, are particularly useful as elastomers.
Inventors
- 👤 Anestis Leonidas Logothetis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:57
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F10/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
42 words
AN AMORPHOUS SUBSTANTIALLY LINEAR ATACTIC ALTERNATING COPOLYMER HAVING A GLASS TRANSITION TEMPERATURE LESS THAN ABOUT 0*C. AND A INHERENT VISCOSITY OF ABOUT 1-6 (MEASURED ON A 0.1 WT % SOLUTION IN CHLOROFORM AT 30*C.), SAID COPOLYMER HAVING REPEATING UNITS CONSISTING ESSENTIALLY OF:
Claim 2
Dependent Claim
42 words
AN AMORPHOUS SUBSTANTIALLY LINEAR ATACTIC ALTERNATING COPOLYMER HAVING A GLASS TRANSITION TEMPERATURE LESS THAN ABOUT 0*C. AND A INHERENT VISCOSITY OF ABOUT 1-6 (MEASURED ON A 0.1 WT % SOLUTION IN CHLOROFORM AT 30*C.), SAID COPOLYMER HAVING REPEATING UNITS CONSISTING ESSENTIALLY OF:
Claim 3
Dependent Claim
12 words
The copolymer of Claim 1 wherein the cure-site monomer has the formula
Claim 4
Dependent Claim
11 words
The copolymer of claim 2 wherein R1 and R2 are hydrogen.
Claim 5
Dependent Claim
17 words
The copolymer of claim 3 wherein the alkyl group of the alkyl acrylate contains 2-8 carbon atoms.
Claim 6
Dependent Claim
12 words
The polymer of claim 1 wherein the alkyl acrylate is ethyl acrylate.
Claim 7
Dependent Claim
15 words
The copolymer of claim 5 wherein the cure-site monomer is maleic anhydride or maleic acid.
Claim 8
Dependent Claim
11 words
The copolymer of claim 1 wherein the curesite monomer is monoethylmaleate.
Claim 9
Dependent Claim
16 words
The copolymer of claim 1 wherein the curesite monomer is the monoethyl ester of fumaric acid.
Claim 10
Dependent Claim
12 words
The copolymer of claim 1 wherein the alkyl acrylate is butyl acrylate.
Claim 11
Dependent Claim
15 words
The copolymer of claim 9 wherein the cure-site monomer is maleic anhydride or maleic acid.
Claim 12
Dependent Claim
11 words
The copolymer of claim 4 wherein the cure-site monomer is monoethylmaleate.
Claim 13
Dependent Claim
12 words
The copolymer of claim 11 wherein the alkyl acrylate is ethyl acrylate.
Claim 14
Dependent Claim
16 words
The copolymer of claim 4 wherein the cure-site monomer is the monoethyl ester of fumaric acid.
Claim 15
Dependent Claim
12 words
The copolymer of claim 13 wherein the alkyl acrylate is ethyl acrylate.
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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |