US5023282A
Expired / Lapsed
US
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Asphalt containing gilsonite, reactive oil and elastomer
Assignee: Aerojet Rocketdyne Holdings Inc
•
Filing: 1989-11-17
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Granted: 1991-06-11
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Expires: 2009-11-17
Abstract
Abstract Asphalt cement compositions are disclosed which utilize petroleum asphalt, natural asphalt, a reactive oil and an elastomer. These compositions produce a superior asphalt cement that can give low viscosity during application followed by high viscosity, toughness and tenacity after curing on the highway.
Inventors
- 👤 Terry C. Neubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:10
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
73 words
An asphalt composition consisting essentially of: 100 parts by weight of a petroleum asphalt; from about 1 to about 10 parts by weight of a natural asphalt; from about 1 to about 10 parts by weight of a thinning reactive oil comprising at least about a 60 percent unsaturated fatty acid content having from about 14 to 24 carbon atoms, and from about 1 to about 10 parts by weight of an elastomer.
Claim 2
Dependent Claim
73 words
An asphalt composition consisting essentially of: 100 parts by weight of a petroleum asphalt; from about 1 to about 10 parts by weight of a natural asphalt; from about 1 to about 10 parts by weight of a thinning reactive oil comprising at least about a 60 percent unsaturated fatty acid content having from about 14 to 24 carbon atoms, and from about 1 to about 10 parts by weight of an elastomer.
Claim 3
Dependent Claim
20 words
The composition of claim 1, wherein the petroleum asphalt is straight asphalt, blown asphalt, solvent extracted asphalt, or cutback asphalt.
Claim 4
Dependent Claim
16 words
The composition of claim 2, wherein the natural asphalt is asphaltite, lake asphalt, or rock asphalt.
Claim 5
Dependent Claim
13 words
The composition of claim 3, wherein the reactive oil is a vegetable oil.
Claim 6
Dependent Claim
87 words
The composition of claim 4, wherein the elastomer is made from conjugated diene monomer having from 4 to 12 carbon atoms, or wherein said elastomer is a copolymer or an interpolymer made from different conjugated diene monomers having from 4 to 12 carbon atoms, or a copolymer made from a conjugated diene having from 4 to 12 carbon atoms with a vinyl substituted aromatic having from 8 to 12 carbon atoms, or wherein said elastomer is an acrylic rubber, a natural rubber, a nitrile rubber, or polychloroprene.
Claim 7
Dependent Claim
14 words
The composition of claim 5, wherein the asphaltite is gilsonite, grahamite, or glance pitch.
Claim 8
Dependent Claim
16 words
The composition of claim 6, wherein the elastomer is a copolymer made from butadiene and styrene.
Claim 9
Dependent Claim
10 words
The composition of claim 7, wherein the asphaltite is gilsonite.
Claim 10
Dependent Claim
24 words
The composition of claim 8, wherein the elastomer has a Mooney viscosity, ML 4 at 212° F., of from about 15 to about 150.
Claim 11
Dependent Claim
26 words
The composition of claim 9, wherein the vegetable oils are corn, cotton seed, linseed, olive, peanut, safflower, sunflower, soybean, tall, or tung oils, or mixtures thereof.
Claim 12
Dependent Claim
21 words
The composition of claim 10, wherein the elastomer has a gel content of from about 0 up to about 95 percent.
Claim 13
Dependent Claim
12 words
The composition of claim 11, wherein the vegetable oil is linseed oil.
Claim 14
Dependent Claim
21 words
The composition of claim 12, wherein the elastomer has a gel content of from about 0 up to about 45 percent.
Claim 15
Dependent Claim
21 words
The composition of claim 13, wherein the elastomer has a gel content of from about 5 up to about 25 percent.
Claim 16
Dependent Claim
78 words
A cured asphalt composition consisting essentially of: 100 parts by weight of a petroleum asphalt; from about 2 to about 8 parts by weight of a natural asphalt, from about 2 to about 8 parts by weight of a reacted oil comprising before reaction at least 60 percent by weight of an unsaturated fatty acid content having from about 14 to about 24 carbon atoms, and from about 2 to about 8 parts by weight of an elastomer.
Claim 17
Dependent Claim
78 words
A cured asphalt composition consisting essentially of: 100 parts by weight of a petroleum asphalt; from about 2 to about 8 parts by weight of a natural asphalt, from about 2 to about 8 parts by weight of a reacted oil comprising before reaction at least 60 percent by weight of an unsaturated fatty acid content having from about 14 to about 24 carbon atoms, and from about 2 to about 8 parts by weight of an elastomer.
Claim 18
Dependent Claim
44 words
The composition of claim 15, wherein the petroleum asphalt is straight asphalt, blown asphalt, solvent extracted asphalt, or cutback asphalt; wherein the natural asphalt is Gilsonite; wherein the reacted oil is linseed oil and the elastomer is a copolymer made from butadiene and styrene.
Claim 19
Dependent Claim
24 words
The composition of claim 16, wherein the elastomer has a Mooney viscosity, ML 4 at 212° F., of from about 20 to about 120.
Claim 20
Dependent Claim
21 words
The composition of claim 17, wherein the elastomer has a gel content of from about 0 up to about 45 percent.
Claim 21
Dependent Claim
17 words
The composition of claim 18, wherein the butadiene:styrene weight ratio is from about 1:4 to about 1:3.
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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) | 1994-06-10 | 1994-12-10 | 1995-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-10 | 1998-12-10 | 1999-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-10 | 2002-12-10 | 2003-06-11 | $7700.00 | Window Closed / Lapsed |