US4129541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphaltic compositions containing conjugated diene-monovinyl-substituted aromatic hydrocarbon copolymers of particular structures
Assignee: Phillips Petroleum Co
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Filing: 1977-10-26
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Granted: 1978-12-12
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Expires: 1997-10-26
Abstract
Abstract An asphaltic composition having low temperature flexibility and resistance to stress cracking, shearing or adhesive failure is prepared using conjugated diene-monovinyl substituted aromatic hydrocarbon copolymers prepared in absence of polar-type randomizers, e.g., tetrahydrofuran, or by incremental addition of both the monovinyl substituted aromatic hydrocarbon and initiator, e.g., organomonolithium. The composition is especially useful in cold places, e.g., as a coating for objects to be stored or kept in cold ground, above ground or under the sea.
Inventors
- 👤 Oren L. Marrs
- 👤 Robert E. Reusser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:17
CPC Classifications
C; C09; C09D; C09D195/00; C08; C08K; C08K3/00; C08K3/01; C08K3/013; C08L; C08L53/00; C08L53/02; C08L95/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
176 words
An improved composition adapted for coating of an object to be protected such as a pipeline to be laid under the sea, especially in cold water or in a cold climate, and having highly desirable resistance to stress cracking or flexibility at low temperatures of the order of 40° F. (4.4° C.) or lower which comprises asphalt, aggregate, and as desired, a fibrous filler and a conjugated diene/monovinyl aromatic radial teleblock copolymer having been prepared by copolymerizing a conjugated diene having 4 to 8 carbon atoms with a monovinyl-substituted aromatic hydrocarbon having 8 to 12 carbon atoms in presence of an organolithium initiator but in absence of randomizer, or by incremental additionof both monovinyl-substituted aromatic hydrocarbon and initiator, said copolymer having a poly(monovinyl-substituted aromatic hydrocarbon) portion which has a weight average molecular weight of at least 7.5% of the weight average molecular weight of the copolymer, the weight ratio of conjugated diene to vinyl aromatic hydrocarbon is in the approximate range 60-95/40-5, and weight average molecular weight of a copolymer is in the approximate range 70,000-300,000.
Claim 2
Dependent Claim
176 words
An improved composition adapted for coating of an object to be protected such as a pipeline to be laid under the sea, especially in cold water or in a cold climate, and having highly desirable resistance to stress cracking or flexibility at low temperatures of the order of 40° F. (4.4° C.) or lower which comprises asphalt, aggregate, and as desired, a fibrous filler and a conjugated diene/monovinyl aromatic radial teleblock copolymer having been prepared by copolymerizing a conjugated diene having 4 to 8 carbon atoms with a monovinyl-substituted aromatic hydrocarbon having 8 to 12 carbon atoms in presence of an organolithium initiator but in absence of randomizer, or by incremental additionof both monovinyl-substituted aromatic hydrocarbon and initiator, said copolymer having a poly(monovinyl-substituted aromatic hydrocarbon) portion which has a weight average molecular weight of at least 7.5% of the weight average molecular weight of the copolymer, the weight ratio of conjugated diene to vinyl aromatic hydrocarbon is in the approximate range 60-95/40-5, and weight average molecular weight of a copolymer is in the approximate range 70,000-300,000.
Claim 3
Dependent Claim
54 words
The composition according to claim 1 wherein the conjugated diene is selected from 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, piperylene, 2,4-hexadiene, and 1,3-octadiene and the vinyl substituted aromatic hydrocarbon is selected from styrene, 3-methylstyrene, 4-n-propylstyrene, 4-t-butylstyrene and the weight ratio of the diene to the aromatic is in the approximate range of from about 60/40 to 85/15.
Claim 4
Dependent Claim
52 words
A composition according to claim 2 wherein the copolymer is prepared by incremental addition of the monovinyl-substituted aromatic hydrocarbon and initiator, the monomers selected are butadiene and styrene, and the weight average molecular weight of the polystyrene portion is at least about 7.5% of the weight average molecular weight of the copolymer.
Claim 5
Dependent Claim
51 words
A composition according to claim 2 wherein the copolymer is prepared from butadiene and styrene in presence of an organolithium initiator but in the absence of randomizer and the weight average molecular weight of the polystyrene portion is at least about 10% of the weight average molecular weight of the copolymer.
Claim 6
Dependent Claim
36 words
A composition according to claim 3 wherein the copolymer has a weight ratio of conjugated diene/vinyl aromatic hydrocarbon in the approximate range of 70-85/30-15 and a molecular weight (weight average) in the approximate range of 125,000-200,000.
Claim 7
Dependent Claim
36 words
A composition according to claim 4 wherein the copolymer has a weight ratio of conjugated diene/vinyl aromatic hydrocarbon in the approximate range of 70-85/30-15 and a molecular weight (weight average) in the approximate range of 125,000-200,000.
Claim 8
Dependent Claim
26 words
A composition according to claim 5 wherein the copolymer is used in an amount of approximately 2-20 weight percent of the asphalt portion of the composition.
Claim 9
Dependent Claim
26 words
A composition according to claim 6 wherein the copolymer is used in an amount of approximately 2-20 weight percent of the asphalt portion of the composition.
Claim 10
Dependent Claim
13 words
A composition according to claim 7 wherein the asphalt is 40-50 penetration asphalt.
Claim 11
Dependent Claim
13 words
A composition according to claim 8 wherein the asphalt is 40-50 penetration asphalt.
Claim 12
Dependent Claim
35 words
A composition according to claim 1 wherein the ingredients composited are as follows: ______________________________________
Ingredient Weight Percent
______________________________________
aggregate 50-70
Finely divided mineral filler
15-35
Asphalt 5-20
Fibrous material 0.05-0.5
Radial teleblock copolymer
0.1-4.0
______________________________________
Claim 13
Dependent Claim
35 words
A composition according to claim 1 wherein the ingredients composited are as follows: ______________________________________
Ingredient Weight Percent
______________________________________
aggregate 55-65
Finely divided mineral filler
20-30
Asphalt 8-15
Fibrous material 0.1-0.5
Radial teleblock copolymer
0.6-1.8
______________________________________
References Cited (Backward Citations)
CA740027A
Cited
US2815296A
Cited
US3265765A
Cited
US3354105A
Cited
US3565842A
Cited
US4008095A
Cited
US3639521A
Cited
US3753936A
Cited
US3778397A
Cited
US3856732A
Cited
US3978014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-11 | 1982-06-12 | 1982-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-11 | 1986-06-12 | 1986-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-11 | 1990-06-12 | 1990-12-12 | $7700.00 | Window Closed / Lapsed |