US4137204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cationic method for emulsifying asphalt-rubber paving material and a stable thixotropic emulsion of said material
Assignee: Individual
•
Filing: 1977-11-14
•
Granted: 1979-01-30
•
Expires: 1997-11-14
Abstract
Abstract A new method is provided for emulsifying an asphalt-rubber pavement repair material into a stable thixotropic emulsion capable of flowing as a liquid upon gentle agitation. The method generally comprises the steps of heating asphalt and rubber to form a jellied reaction product, and admixing an asphalt-rubber soap consisting essentially of water, a cationic water soluble emulsifying agent, a thickener, and aluminum sulfate to form a thixotropic emulsion capable of flowing as a liquid upon gentle agitation.
Inventors
- 👤 Charles H. McDonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:14
CPC Classifications
C; C08; C08L; C08L95/00; C08L95/005; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/926
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
A method for emulsifying an asphalt-rubber pavement material into a stable, thixotropic emulsion capable of flowing as a liquid upon agitation and comprising the steps of: a. heating a mixture of about 2 to about 5 parts of paving grade asphalt with a penetration range of 10 through 300 and about 1 part of particulate non-oil resistant asphalt soluble rubber, reclaimed rubber and partially devulcanized reclaimed rubber to a temperature within the range of about 350° F. to about 500° F. to form a jellied reaction product, and b. admixing said jellied reaction product with an asphalt-rubber soap consisting essentially of water, a cationic water soluble emulsifying agent comprising a mixture of imidazoline and quaternary diamine asphalt emulsifiers, a thickener, and aluminum sulfate.
Claim 2
Dependent Claim
60 words
The method as set forth in claim 1 wherein said soap comprises, in parts by weight, about 75 to about 97 parts of water, about 3 to about 14 parts of said cationic emulsifying agent, about 3 to about 10 parts of about a 15% aluminum sulfate solution in water, and about 0.1 to about 2 parts of a thickener.
Claim 3
Dependent Claim
38 words
The method as set forth in claim 2 wherein about 1 to about 6 parts of said soap is an imidazoline emulsifying agent and about 2 to about 8 parts of said soap is a quaternary diamine emulsifier.
Claim 4
Dependent Claim
116 words
A stable, thixotropic emulsion of an asphalt-rubber pavement material capable of flowing as a liquid upon gentle agitation comprising: a. a mixture of about 2 to about 5 parts of paving grade asphalt with a penetration range of about 10 through 300 to about 1 part of particulate non-oil resistant asphalt soluble rubber selected from the group consisting of whole tire rubber, reclaimed rubber and partially devulcanized reclaimed rubber heated to a temperature within the range of about 350° F. to about 500° F. to form a jellied reaction product, and b. an asphalt-rubber soap consisting essentially of water, a mixture of imidazoline and quaternary diamine cationic water soluble emulsifying agents, a thickener, and aluminum sulfate.
Claim 5
Dependent Claim
60 words
The emulsion as set forth in claim 4 wherein said soap comprises, in parts by weight, about 75 to about 97 parts of water, about 3 to about 14 parts of said cationic emulsifying agent, about 3 to about 10 parts of about a 15% aluminum sulfate solution in water, and about 0.1 to about 2 parts of a thickener.
Claim 6
Dependent Claim
38 words
The emulsion as set forth in claim 5 wherein about 1 to about 6 parts of said soap is an imidazoline emulsifying agent and about 2 to about 8 parts of said soap is a quaternary diamine emulsifier.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |