US3856732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified asphalt hydraulic sealer
Assignee: Phillips Petroleum Co
•
Filing: 1973-01-22
•
Granted: 1974-12-24
•
Expires: 1993-01-22
Abstract
Abstract Cut-back asphalt, when modified by the addition of a small amount of a butadiene-styrene block copolymer, a hydrogenated butadiene-styrene copolymer, or mixtures thereof, or an ethylenevinyl acetate copolymer, provides an effective hydraulic sealant when applied to a nonwoven fabric.
Inventors
- 👤 C Bresson
- 👤 F Spaulding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:07
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/16; C; C08; C08L; C08L95/00; E02B3/04; E02B3/12; E02B3/122; E02B3/126
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
68 words
A SEALANT COMPOSITION CONSISTING ESSENTIALLY OF AN AIRBLOWN CUT-BACK ASPHALT HAVING INCORPORATED THEREIN FROM 1 TO 10 WEIGHT PERCENT OF ASPHALT OF A HYDROGENATED RANDOM BUTADIENESTYRENE COPOLYMER HAVING A BUTADIENE CONTENT RANGING FROM 30 TO 44 WEIGHT PRCENT WITH THE REMAINDER BEING STYRENE, AND AN APPROXIMATE MOLECULARR WEIGHT IN THE RANGE OF 25,000 TO 125,000, SAID COPOLYMER HAVING BEEN HYDROGENATED TO NOT MORE THAN 5 PERCENT OLEFINIC UNSATURATION.
Claim 2
Dependent Claim
68 words
A SEALANT COMPOSITION CONSISTING ESSENTIALLY OF AN AIRBLOWN CUT-BACK ASPHALT HAVING INCORPORATED THEREIN FROM 1 TO 10 WEIGHT PERCENT OF ASPHALT OF A HYDROGENATED RANDOM BUTADIENESTYRENE COPOLYMER HAVING A BUTADIENE CONTENT RANGING FROM 30 TO 44 WEIGHT PRCENT WITH THE REMAINDER BEING STYRENE, AND AN APPROXIMATE MOLECULARR WEIGHT IN THE RANGE OF 25,000 TO 125,000, SAID COPOLYMER HAVING BEEN HYDROGENATED TO NOT MORE THAN 5 PERCENT OLEFINIC UNSATURATION.
Claim 3
Dependent Claim
39 words
A composition according to claim 1 having additionally incorporated therein a modifying amount of a butadiene-styrene block copolymer wherein the ratio of said hydrogenated copolymer to said block copolymer is in the range of 1:10 to 10:1 by weight.
Claim 4
Dependent Claim
33 words
A composition according to claim 2 wherein the admixture of said hydrogenated copolymer and said block copolymer is present in amounts ranging from 1 to 10 weight percent based upon weight of asphalt.
Claim 5
Dependent Claim
19 words
A composition according to claim 3 wherein the ratio of said hydrogenated copolymer to said block copolymer is 1:1.
Claim 6
Dependent Claim
58 words
A composition according to claim 4 wherein said hydrogenated copolymer has an approximate molecular weight ranging from 25,000 to 125,000 and is hydrogenated to not more than 5 weight percent unsaturation and wherein said block copolymer has a butadiene content of 70 weight percent, a styrene content of 30 weight percent and contains 29 weight percent block polystyrene.
References Cited (Backward Citations)
CA740027A
Cited
US2868749A
Cited
US2834742A
Cited
US2842507A
Cited
US3010928A
Cited
US3238173A
Cited
US3344101A
Cited
US3345316A
Cited
US3527724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |