US4528241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemically modified asphalts and glass fibers treated therewith
Assignee: Owens Corning Fiberglas Technology Inc
•
Filing: 1984-02-06
•
Granted: 1985-07-09
•
Expires: 2004-02-06
Abstract
Abstract Improved chemically modified asphalts are provided of the type which is the reaction product of asphalt, a vinyl aromatic monomer and a rubbery polymer. The improved compositions are capable of impregnating glass fiber bundles and have increased elastic recovery rates, increased viscosity stability, less tack and lower viscosity. Such improved compositions are obtained by employing a styrene-butadiene thermoplastic rubber copolymer as a coreactant with the asphalt and vinyl aromatic monomer.
Inventors
- 👤 William E. Uffner
- 👤 Robert N. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:19
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/026; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/2964; Y10T428/2967; Y10T428/31504; Y10T428/31551; Y10T428/31641; Y10T428/31645; Y10T428/31815; Y10T428/31855; Y10T428/31931; Y10T442/00; Y10T442/20; Y10T442/2926; Y10T442/2992
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
125 words
In a glass fiber bundle comprised of a multitude of individual glass fiber filaments and having an asphaltic coating thereon, the improvement wherein said coating is a reaction product of asphalt, a vinyl aromatic monomer and a linear block copolymer of styrene and butadiene having polystyrene end blocks and a polybutadiene mid block, said composition impregnating said bundle by coating substantially the entire surface area of said individual filaments, and wherein said composition has an increased elastic recovery rate, increased viscosity stability, is less tacky, has a lower viscosity and improved glass fiber bundle impregnant qualities compared to a composition which is the reaction product of said asphalt, said vinyl aromatic monomer and a rubbery polymer which is a styrene-butadiene copolymer of the A-B type.
Claim 2
Dependent Claim
125 words
In a glass fiber bundle comprised of a multitude of individual glass fiber filaments and having an asphaltic coating thereon, the improvement wherein said coating is a reaction product of asphalt, a vinyl aromatic monomer and a linear block copolymer of styrene and butadiene having polystyrene end blocks and a polybutadiene mid block, said composition impregnating said bundle by coating substantially the entire surface area of said individual filaments, and wherein said composition has an increased elastic recovery rate, increased viscosity stability, is less tacky, has a lower viscosity and improved glass fiber bundle impregnant qualities compared to a composition which is the reaction product of said asphalt, said vinyl aromatic monomer and a rubbery polymer which is a styrene-butadiene copolymer of the A-B type.
Claim 3
Dependent Claim
16 words
The bundle of claim 1 wherein in said improvement said vinyl aromatic monomer reactant is styrene.
Claim 4
Dependent Claim
38 words
The bundle of claim 2 wherein in said improvement said asphalt reactant has a penetration of about 40-65 and a viscosity at 260° F. of about 500-550 cps and a viscosity at 300° F. of about 100-120 cps.
Claim 5
Dependent Claim
78 words
The bundle of claim 2 wherein in said improvement said asphalt reactant is an AC-20 paving grade and said asphalt is used in an amount of about 75 to about 88 percent by weight, styrene in an amount of about 9 to about 13 percent by weight and said thermoplastic rubber copolymer in an amount of about 6 to about 8 percent by weight and wherein said thermoplastic rubber has a solution viscosity of less than 9,000 cps.
Claim 6
Dependent Claim
53 words
The bundle of claim 4 wherein in said improvement said asphalt reactant is about 81 to about 82 percent, styrene about 10 to about 11 percent and said thermoplastic rubber copolymer about 7 to about 8 percent and wherein said composition has a viscosity of less than about 550 cps at 380° F.
References Cited (Backward Citations)
CA740027A
Cited
US3265765A
Cited
US4032491A
Cited
US4074948A
Cited
US4175978A
Cited
US4217259A
Cited
US4273685A
Cited
US4130156A
Cited
US4201812A
Cited
US4404316A
Cited
US4444947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-08 | 1989-01-07 | 1989-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-08 | 1993-01-07 | 1993-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-08 | 1997-01-07 | 1997-07-09 | $7700.00 | Window Closed / Lapsed |