US3932369A
Expired / Lapsed
US
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Block copolymers containing olefin sulfur dioxide segments and process for their preparation
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1974-11-06
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Granted: 1976-01-13
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Expires: 1994-11-06
Abstract
Abstract The instant invention relates to novel block copolymers containing olefin sulfur-dioxide segments and a process for their preparation. The olefin of choice is a "strained" olefin thus capable of reaction with SO2 in the presence of radicals at very high rates. Examples of strained olefins include cyclopropene, cyclobutene, norbornene, and the derivatives thereof. The novel block copolymers are prepared by contacting the olefin and the sulfur dioxide with a polymer under conditions of shearing degradation whereby said polymer is broken down into radical-containing segments which subsequently combine with the olefin and sulfur dioxide to form the novel copolymers described above. The polymer may be selected from the group consisting of polyisobutylene, poly(ethylene oxide), ethylene-propylene copolymers, poly(propylene oxide), polybutadiene, polyisoprene, etc. A novel block polymer formed by this preferred process shows improved properties as compared to physical mixtures of said polymer and olefin-sulfur dioxide copolymers. For example, the novel polymers formed by the preferred process of the instant invention show higher moduli and may be plasticized to higher levels while retaining good physical properties.
Inventors
- 👤 Guido Sartori
- 👤 Robert D. Lundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:14
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22; C08F; C08F293/00
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
101 words
A process for preparing block copolymers comprising olefin-sulfur dioxide blocks which comprises subjecting a polymer, which can be converted by means of shear into radical bearing segments, to shear at conditions wherein said polymer is broken down into free radical bearing segments, in the presence of the olefin, said olefin being a cis cycloolefin having a ring strain of at least about 4 kilocalories per mole, as compared to a corresponding open chain structure, and sulfur dioxide for a time sufficient to form a block copolymer comprising one or more of said polymer segments linked to a olefin-sulfur dioxide copolymer block.
Claim 2
Dependent Claim
101 words
A process for preparing block copolymers comprising olefin-sulfur dioxide blocks which comprises subjecting a polymer, which can be converted by means of shear into radical bearing segments, to shear at conditions wherein said polymer is broken down into free radical bearing segments, in the presence of the olefin, said olefin being a cis cycloolefin having a ring strain of at least about 4 kilocalories per mole, as compared to a corresponding open chain structure, and sulfur dioxide for a time sufficient to form a block copolymer comprising one or more of said polymer segments linked to a olefin-sulfur dioxide copolymer block.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein said olefin is selected from the group consisting of cyclopropene, cyclobutene, norbornene, 5-chloronorbornene, 7-chloronorbornene, 5-methylnorbornene, 5-ethyl-norbornene, 5-cyanonorbornene, norbornene-5,6-dicarboxylic acid anhydride, 5-hydroxymethyl-norbornene, 5-acetoxynorbornene, and norbornene-5,6-dicarboxylic acid esters.
Claim 4
Dependent Claim
30 words
The process of claim 1 wherein said olefin is selected from the group consisting of norbornene, 5-chloronorbornene, 7-chloronorbornene, 5-methyl-norbornene, 5-ethyl-norbornene, 5-cyanonorbornene, norbornene-5,6-dicarboxylic acid anhydride, 5-hydroxymethyl-norbornene, 5-acetoxynorbornene, and norbornene-5,6-dicarboxylic acid esters.
Claim 5
Dependent Claim
10 words
The process of claim 1 wherein said olefin is norbornene.
Claim 6
Dependent Claim
22 words
The process of claim 1 wherein said polymer is non-crystalline and has a number average molecular weight of from 1,000,000 to 4,000,000.
Claim 7
Dependent Claim
19 words
The process of claim 5 wherein said polymer is selected from the group consisting of polyisobutylene and polyethylene oxide.
Claim 8
Dependent Claim
10 words
The process of claim 1 wherein the polymer is polyisobutylene.
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein said polymer is dissolved in a solvent.
Claim 10
Dependent Claim
25 words
The process of claim 1 wherein said conditions comprise a temperature of from -60° to +40°C. and a time of from 0.5 to 10 minutes.
Claim 11
Dependent Claim
55 words
A block copolymer comprising one or more strained olefin-sulfur dioxide segments, wherein said strained olefin is a cis cycloolefin having a ring strain of at least about 4 kilocalories per mole as compared to a corresponding open chain structure, and one or more polymer blocks of a monomer which does not undergo free radical polymerization.
Claim 12
Dependent Claim
55 words
A block copolymer comprising one or more strained olefin-sulfur dioxide segments, wherein said strained olefin is a cis cycloolefin having a ring strain of at least about 4 kilocalories per mole as compared to a corresponding open chain structure, and one or more polymer blocks of a monomer which does not undergo free radical polymerization.
Claim 13
Dependent Claim
11 words
The composition of claim 10 wherein said polymer block is polyisobutylene.
Claim 14
Dependent Claim
12 words
The composition of claim 10 wherein said polymer block is polyethylene oxide.
Claim 15
Dependent Claim
12 words
The composition of claim 10 wherein said polymer block is polypropylene oxide.
Claim 16
Dependent Claim
11 words
The composition of claim 10 wherein said polymer block is polypentenamer.
Claim 17
Dependent Claim
11 words
The composition of claim 10 wherein said polymer block is 1,4-cis-polybutadiene.
Claim 18
Dependent Claim
11 words
The composition of claim 10 wherein said polymer block is 1,4-cis-polyisoprene.
Claim 19
Dependent Claim
13 words
The composition of claim 10 wherein said polymer block is polyisobutyl vinyl ether.
Claim 20
Dependent Claim
11 words
The composition of claim 10 wherein said polymer block is polydimethylsiloxane.
Claim 21
Dependent Claim
16 words
The composition of claim 10 wherein said polymer block is a copolymer of ethylene and propylene.
Claim 22
Dependent Claim
30 words
The composition of claim 10 wherein said olefin is selected from the group consisting of norbornene, 5-chloronobornene, 7-chloronorbornene, 5-methyl-norbornene, 5-ethyl-norbornene, 5-cyanonorbornene, norbornene-5,6-dicarboxylic acid anhydride, 5-hydroxymethyl-norbornene, 5-acetoxynorbornene, and norbornene-5,6-dicarboxylic acid esters.
Claim 23
Dependent Claim
10 words
The composition of claim 20 wherein said olefin is norbornene.
Claim 24
Dependent Claim
11 words
The composition of claim 20 wherein said polymer block is polyisobutylene.
Claim 25
Dependent Claim
12 words
The composition of claim 20 wherein said polymer block is polyethylene oxide.
Claim 26
Dependent Claim
12 words
The composition of claim 20 wherein said polymer block is polypropylene oxide.
Claim 27
Dependent Claim
11 words
The composition of claim 20 wherein said polymer block is polypentenamer.
Claim 28
Dependent Claim
11 words
The composition of claim 20 wherein said polymer block is 1,4-cis-polybutadiene.
Claim 29
Dependent Claim
11 words
The composition of claim 20 wherein said polymer block is 1,4-cis-polyisoprene.
Claim 30
Dependent Claim
13 words
The composition of claim 20 wherein said polymer block is polyisobutyl vinyl ether.
Claim 31
Dependent Claim
11 words
The composition of claim 20 wherein said polymer block is polydimethylsiloxane.
Claim 32
Dependent Claim
16 words
The composition of claim 20 wherein said polymer block is a copolymer of ethylene and propylene.
Claim 33
Dependent Claim
20 words
The composition of claim 10 wherein the strained olefin-sulfur dioxide comprises from 1 to 80% by weight of said 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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |