Patent US4444947A successfully refreshed from Google Patents.
US4444947A
Expired / Lapsed
US
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Chemically modified high oil asphalt
Assignee: Owens Corning
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Filing: 1982-08-12
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Granted: 1984-04-24
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Expires: 2002-08-12
Abstract
Abstract A chemically modified asphalt composition is provided which is especially adapted for use in the repair and maintenance of highways. The composition is a reaction product of a high oil asphalt, a vinyl aromatic monomer and a rubbery, or elastomeric, polymer.
Inventors
- 👤 Edward R. Harrington
- 👤 William E. Uffner
- 👤 Richard T. Janicki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:44
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F289/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
In a composition which comprises the reaction product of asphalt, a vinyl aromatic monomer and an elastomer which is homopolymer of a conjugated diene or a copolymer of a conjugated diene and at least one ethylenic monomer copolymerizable therewith, the improvement comprising a composition having increased resistance to thermal degradation and improved low temperature fluctural strength and wherein said asphalt is an air blown high oil asphalt having a viscosity factor of at least about 120 and a viscosity of about 550 cps to about 700 cps at 260° F.
Claim 2
Dependent Claim
90 words
In a composition which comprises the reaction product of asphalt, a vinyl aromatic monomer and an elastomer which is homopolymer of a conjugated diene or a copolymer of a conjugated diene and at least one ethylenic monomer copolymerizable therewith, the improvement comprising a composition having increased resistance to thermal degradation and improved low temperature fluctural strength and wherein said asphalt is an air blown high oil asphalt having a viscosity factor of at least about 120 and a viscosity of about 550 cps to about 700 cps at 260° F.
Claim 3
Dependent Claim
12 words
The improvement of claim 1 wherein said vinyl aromatic monomer is styrene.
Claim 4
Dependent Claim
15 words
The improvement of claim 2 wherein said rubber is a copolymer of styrene and butadiene.
Claim 5
Dependent Claim
57 words
An asphaltic-based composition which comprises the reaction product of a high oil asphalt, a vinyl aromatic monomer and a homopolymer of a conjugated diene or a copolymer of a conjugated diene with at least one ethylenic monomer copolymerizable therewith, said asphalt being a air blown high oil asphalt having a viscosity factor of greater than about 120.
Claim 6
Dependent Claim
57 words
An asphaltic-based composition which comprises the reaction product of a high oil asphalt, a vinyl aromatic monomer and a homopolymer of a conjugated diene or a copolymer of a conjugated diene with at least one ethylenic monomer copolymerizable therewith, said asphalt being a air blown high oil asphalt having a viscosity factor of greater than about 120.
Claim 7
Dependent Claim
64 words
The composition of claim 4 said high oil asphalt is produced from an asphalt having an asphaltene content of less than about 25% and a combined naphthene and polar aromatic content of about at least 40% by air blowing to a penetration of at least about 50 and to provide an asphalt having a penetration to softening point ratio of about at least 0.385.
Claim 8
Dependent Claim
24 words
The composition of claim 4 wherein said air blown asphalt has a penetration of about 60 and a softening point of about 130° F.
References Cited (Backward Citations)
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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) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |