US3869417A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modification of asphalt with ethylene-vinyl acetate copolymers to improve properties
Assignee: Phillips Petroleum Co
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Filing: 1971-02-16
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Granted: 1975-03-04
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Expires: 1991-02-16
Abstract
Abstract Asphalt is modified by blending with ethylene vinyl acetate copolymer and, optionally, low density polyethylene and/or wax to provide coating compositions particularly useful in forming laminates, adhesives, pond liners and the like.
Inventors
- 👤 Ray D Ramsay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:07
CPC Classifications
C; C08; C08L; C08L95/00; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2221; Y10T442/2254
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
79 words
A COATING COMPOSITION CONSISTING ESSENTIALLY OF 95 WEIGHT PERCENT OF AN OXIDIZED ASPHALT HAVING A PENETRATION AT 77*F., AFTER OXIDATION, OF ABOUT 35 AND A RING AND BALL SOFTENING POINT, AFTER OXIDATION, OF ABOUT 165*F. AND ABOUT % WEIGHT PERCENT OF AN ETHYLENE-VINYL ACETATE COPOLYMER HAVING A VINYL ACETATE CONTENT IN THE RANGE OF 17 TO 19 WEIGHT PERCENT, A MELT INDEX IN THE RANGE OF 2.1 TO 2.9, AND A RING AND BALL SOFTENING POINT OF ABOUT 390*F.
Claim 2
Dependent Claim
79 words
A COATING COMPOSITION CONSISTING ESSENTIALLY OF 95 WEIGHT PERCENT OF AN OXIDIZED ASPHALT HAVING A PENETRATION AT 77*F., AFTER OXIDATION, OF ABOUT 35 AND A RING AND BALL SOFTENING POINT, AFTER OXIDATION, OF ABOUT 165*F. AND ABOUT % WEIGHT PERCENT OF AN ETHYLENE-VINYL ACETATE COPOLYMER HAVING A VINYL ACETATE CONTENT IN THE RANGE OF 17 TO 19 WEIGHT PERCENT, A MELT INDEX IN THE RANGE OF 2.1 TO 2.9, AND A RING AND BALL SOFTENING POINT OF ABOUT 390*F.
Claim 3
Dependent Claim
128 words
A composition consisting essentially of about 90 weight percent of an oxidized asphalt having a penetration, after oxidation, of about 35 and a ring and ball softening point, after oxidation, of about 165* F. and a mixture of about 5 weight percent of an ethylene-vinyl acetate copolymer having a vinyl acetate content in the range of 32 to 34 weight percent, a melt index in the range of 22 to 28, and a ring and ball softening point of about 240* F., and about 5 weight percent of a second ethylene-vinyl acetate copolymer having a vinyl acetate content in the range of 17 to 19 weight percent, a melt index in the range of 2.1 to 2.9, and a ring and ball softening point of about 390* F.
Claim 4
Dependent Claim
128 words
A composition consisting essentially of about 90 weight percent of an oxidized asphalt having a penetration, after oxidation, of about 35 and a ring and ball softening point, after oxidation, of about 165* F. and a mixture of about 5 weight percent of an ethylene-vinyl acetate copolymer having a vinyl acetate content in the range of 32 to 34 weight percent, a melt index in the range of 22 to 28, and a ring and ball softening point of about 240* F., and about 5 weight percent of a second ethylene-vinyl acetate copolymer having a vinyl acetate content in the range of 17 to 19 weight percent, a melt index in the range of 2.1 to 2.9, and a ring and ball softening point of about 390* F.
Claim 5
Dependent Claim
93 words
A laminate system comprising a polyolefin fabric layer impregnated with a modified asphalt composition consisting essentially of 95 weight percent of an oxidized asphalt having a penetration at 77* F., after oxidation, of about 35 and a ring and ball softening point, after oxidation, of about 165* F. and about 5 weight percent of an ethylene-vinyl acetate copolymer having a vinyl acetate content in the range of 17 to 19 weight percent, a melt index in the range of 2.1 to 2.9, and a ring and ball softening point of about 390* F.
Claim 6
Dependent Claim
93 words
A laminate system comprising a polyolefin fabric layer impregnated with a modified asphalt composition consisting essentially of 95 weight percent of an oxidized asphalt having a penetration at 77* F., after oxidation, of about 35 and a ring and ball softening point, after oxidation, of about 165* F. and about 5 weight percent of an ethylene-vinyl acetate copolymer having a vinyl acetate content in the range of 17 to 19 weight percent, a melt index in the range of 2.1 to 2.9, and a ring and ball softening point of about 390* F.
Claim 7
Dependent Claim
140 words
A laminate system comprising a polyolefin fabric layer impregnated with a modified asphalt composition consisting essentially of about 90 weight percent of an oxidized asphalt having a penetration, after oxidation, of about 35 and a ring and ball softening point, after oxidation, of about 165* F. and a mixture of about 5 weight percent of an ethylene-vinyl acetate copolymer having a vinyl acetate content in the range of 32 to 34 weight percent, a melt index in the range of 22 to 28, and a ring and ball softening point of about 240* F., and about 5 weight percent of a second ethylene-vinyl acetate copolymer having a vinyl acetate content in the range of 17 to 19 weight percent, a melt index in the range of 2.1 to 2.9, and a ring and ball softening point of about 390* F.
Claim 8
Dependent Claim
140 words
A laminate system comprising a polyolefin fabric layer impregnated with a modified asphalt composition consisting essentially of about 90 weight percent of an oxidized asphalt having a penetration, after oxidation, of about 35 and a ring and ball softening point, after oxidation, of about 165* F. and a mixture of about 5 weight percent of an ethylene-vinyl acetate copolymer having a vinyl acetate content in the range of 32 to 34 weight percent, a melt index in the range of 22 to 28, and a ring and ball softening point of about 240* F., and about 5 weight percent of a second ethylene-vinyl acetate copolymer having a vinyl acetate content in the range of 17 to 19 weight percent, a melt index in the range of 2.1 to 2.9, and a ring and ball softening point of about 390* F.
Claim 9
Dependent Claim
29 words
A laminate system according to claim 4 wherein said asphalt composition has incorporated therein from 0.5 to about 10 weight percent, based on weight of asphalt-copolymer blend, of asbestos.
Claim 10
Dependent Claim
31 words
A laminate system according to claim 4 wherein said modified asphalt composition has incorporated therein from about 2.5 to about 5 weight percent, based on weight of asphalt-copolymer blend, of asbestos.
Claim 11
Dependent Claim
25 words
A laminate system according to claim 4 wherein said polyolefin fabric is impregnated with 0.5 gallon of said modified asphalt composition per yard of fabric.
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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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |