Patent US3879343A successfully refreshed from Google Patents.
US3879343A
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Stabilizing hydrocarbon copolymers of bicyclic monomers against gelation during bulk processing
Assignee: EIDP Inc
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Filing: 1973-05-30
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Granted: 1975-04-22
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Expires: 1993-05-30
Abstract
Abstract Normally solid Alpha -monoolefin hydrocarbon copolymers containing norbornylene groups or substituted derivatives thereof are stabilized against gelation during bulk processing by the addition of a thiuram disulfide or a xanthogen disulfide.
Inventors
- 👤 Marjorie Ruth Debrunner
- 👤 John Joseph Verbanc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:40
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/39; C08K5/40
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
35 words
IN A PROCESS OF STABILIZING AGAINST GELATION, DURING THE SHEARING PHASES OF BULK PRECESING, A NORMALLY SOLID ELASTOMERIC HYDROCARBON COPOLYMER PREPARED FROM A MONOMER MIXTURE COMPRISING AN A-MONOOLEFIN AND A NORBORNENE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
35 words
IN A PROCESS OF STABILIZING AGAINST GELATION, DURING THE SHEARING PHASES OF BULK PRECESING, A NORMALLY SOLID ELASTOMERIC HYDROCARBON COPOLYMER PREPARED FROM A MONOMER MIXTURE COMPRISING AN A-MONOOLEFIN AND A NORBORNENE HAVING THE GENERAL FORMULA:
Claim 3
Dependent Claim
36 words
In a process of stabilizing against gelation, during the shearing phases of bulk processing, a normally solid elastomeric hydrocarbon copolymer prepared from a monomer mixture comprising an Alpha -monoolefin and a norbornene having the general formula:
Claim 4
Dependent Claim
36 words
In a process of stabilizing against gelation, during the shearing phases of bulk processing, a normally solid elastomeric hydrocarbon copolymer prepared from a monomer mixture comprising an Alpha -monoolefin and a norbornene having the general formula:
Claim 5
Dependent Claim
20 words
The process of claim 1 in which the copolymer contains 2-15 weight percent unsaturated norbornylene derivatives having the general formula:
Claim 6
Dependent Claim
26 words
The process of claim 1 in which the norbornylene groups or substituted derivatives thereof are present in the amount of about 5 to 40 weight percent.
Claim 7
Dependent Claim
24 words
The process of claim 3 in which the thiuram disulfide is selected from the group consisting of tetraethylthiuram disulfide, tetrabutylthiuram disulfide, and tetramethylthiuram disulfide.
Claim 8
Dependent Claim
27 words
The process of claim 3 in which the xanthogen disulfide is selected from the group consisting of diisopropyl xanthogen disulfide, diethyl xanthogen disulfide, and didodecyl xanthogen disulfide.
Claim 9
Dependent Claim
13 words
The process of claim 1 in which the copolymer is prepared from ethylene/propylene/norbornene/1,4-hexadiene.
Claim 10
Dependent Claim
13 words
The process of claim 1 in which the copolymer is prepared from ethylene/5-methyl-2-norbornene/1,4-hexadiene.
Claim 11
Dependent Claim
13 words
The process of claim 1 in which the copolymer is prepared from ethylene/5-butyl-2-norobornene/5-ethylidene-2-norbornene.
Claim 12
Dependent Claim
12 words
The process of claim 8 in which the stabilizer is tetramethylthiuram disulfide.
Claim 13
Dependent Claim
13 words
The process of claim 8 in which the stabilizer is diethyl xanthogen disulfide.
Claim 14
Dependent Claim
16 words
The process of claim 1 wherein said copolymer is a copolymer of ethylene and said norbornene.
Claim 15
Dependent Claim
28 words
The process of claim 1 wherein said stabilizer is added to the copolymer before the latter is isolated from the solution or slurry in which it is prepared.
Claim 16
Dependent Claim
12 words
The process of claim 12 wherein said stabilizer is a xanthogen disulfide.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |