US4404316A
Expired / Lapsed
US
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Chemically modified asphalt compositions
Assignee: Owens Corning Fiberglas Technology Inc
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Filing: 1981-11-03
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Granted: 1983-09-13
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Expires: 2001-11-03
Abstract
Abstract A chemically modified asphalt prepared by reacting an asphalt with a polymerizable vinyl monomer (e.g., styrene) and a rubbery polymer including reclaimed rubber (either natural or synthetic) whereby the rubbery polymer is chemically integrated with the asphalt. The chemically modified asphalt compositions of the invention can be used in the treatment of glass fibers as well as in road paving applications and the like.
Inventors
- 👤 Alfred Marzocchi
- 👤 Michael G. Roberts
- 👤 Charles E. Bolen
- 👤 Edward L. Harrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:24
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/026; C08; C08L; C08L95/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2962; Y10T428/2964
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
34 words
A chemically-modified asphalt composition comprising an asphalt which has been reacted with (1) a polymerizable vinyl aromatic monomer, (2) a rubbery polymer which is at least partially uncured and/or unvulcanized and (3) reclaimed rubber.
Claim 2
Dependent Claim
40 words
A chemically modified asphalt as defined in claim 1 wherein the rubbery polymer is selected from the group consisting of homopolymers of a conjugated diene and copolymers formed of a conjugated diene and at least one ethylenic monomer copolymerizable therewith.
Claim 3
Dependent Claim
31 words
A chemically modified asphalt as defined in claim 2 wherein the ethylenic monomer is selected from the group consisting of styrene, acrylonitrile, methacrylonitrile, acrylic acid, methacrylic acid, hydroxystyrene, aminostyrene and mercaptostyrene.
Claim 4
Dependent Claim
37 words
A chemically modified asphalt as defined in claim 1 wherein the asphalt is an asphalt which has been pre-reacted with a modifying agent selected from the group consisting of steam, an oxygen-containing gas, ammonia and organic amines.
Claim 5
Dependent Claim
33 words
A chemically modified asphalt as defined in claim 1 wherein the vinyl aromatic monomer is reacted in an amount within the range of 0.5 to 35% based upon the weight of the asphalt.
Claim 6
Dependent Claim
33 words
A chemically modified asphalt as defined in claim 1 wherein the total of (2) and (3) is an amount ranging from 0.5 to 30% by weight based on the weight of the asphalt.
Claim 7
Dependent Claim
25 words
A chemically modified asphalt as defined in claim 1 wherein the weight ratio between (1) and (2) is within the range of 0.2 and 0.8.
Claim 8
Dependent Claim
22 words
A chemically modified asphalt composition comprising asphalt which has been reacted with (1) a polymerizable vinyl aromatic monomer and (2) reclaimed rubber.
Claim 9
Dependent Claim
35 words
A chemically modified asphalt as defined in claim 8 wherein the vinyl aromatic monomer is reacted in an amount within the range of 0.5 to 30% by weight based upon the weight of the asphalt.
Claim 10
Dependent Claim
34 words
A chemically modified asphalt as defined in claim 8 wherein the reclaimed rubber is reacted in an amount within the range of 0.5 to 30% by weight based upon the weight of the asphalt.
Claim 11
Dependent Claim
18 words
A chemically modified asphalt as defined in claim 1 wherein the vinyl aromatic monomer is a monovinyl monomer.
Claim 12
Dependent Claim
16 words
A chemically modified asphalt as defined in claim 1 wherein the vinyl aromatic monomer is styrene.
Claim 13
Dependent Claim
18 words
Glass fibers having a coating thereon, said coating comprising a chemically modified asphalt as defined in claim 1.
Claim 14
Dependent Claim
27 words
Glass fibers as defined in claim 13 wherein the glass fibers are in the form of a bundle and the coating constitutes an impregnant in the bundle.
Claim 15
Dependent Claim
24 words
Glass fibers as defined in claim 13 wherein the glass fibers contain on the surfaces thereof a thin film coating of an organo silane.
Claim 16
Dependent Claim
34 words
In a glass fiber reinforced asphalt wherein an asphalt constitutes a continuous phase in which the glass fibers are distributed as reinforcement, the improvement comprising a chemically modified asphalt as defined in claim 1.
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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) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |