US4018730A
Expired / Lapsed
US
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Method for emulsifying asphalt-rubber paving material and a stable thixotropic emulsion of said material
Assignee: First Interstate Bank of Arizona
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Filing: 1975-06-06
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Granted: 1977-04-19
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Expires: 1995-06-06
Abstract
Abstract A new method is provided for emulsifing a asphaltrubber 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 a asphalt-rubber soap consisting essentially of water, an anionic water soluble emulsifying agent, a thickner, and the halide of an alkali metal or an alkaline earth metal 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
2026-10-27 21:19
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/18; E01C7/26; E01C7/265; C; C08; C08K; C08K3/00; C08K3/16; C08L; C08L17/00; C08L95/00; C08L95/005
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
128 words
A method for emulsifying a asphalt-rubber pavement material into a stable, thixotropic emulsion capable of flowing as a liquid upon agitation 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 selected from the group consisting of whole tire rubber, reclaimed rubber and partially devulcanized reclaimed rubber to a temperature within the range of about 350° F to about 500° F forming a jellied reaction product, b. admixing said jellied reaction product with a asphalt-rubber soap consisting essentially of water, an anionic water soluble emulsifying agent, a thickener, and a halide of an alkali metal or an alkaline earth metal.
Claim 2
Dependent Claim
45 words
The method as set forth in claim 1 wherein said anionic water soluble emulsifying agent comprises a soap of an asphalt emulsifier, and wherein said halide is selected from the group consisting of the halides of calcium, barium, magnesium, sodium, potassium, lithium, or mixtures thereof.
Claim 3
Dependent Claim
13 words
The method as set forth in claim 2 wherein said halide is chlorine.
Claim 4
Dependent Claim
14 words
The method as set forth in claim 2 wherein said thickener is boiled starch.
Claim 5
Dependent Claim
35 words
The method set forth in claim 2 wherein said anionic water soluble emulsifying agent comprises a soap of an asphalt emulsifier and a lignin selected from the group consisting of lignin salt and lignin sulfonate.
Claim 6
Dependent Claim
87 words
The method as set forth in claim 2 wherein said anionic water soluble emulsifying agent comprises a soap of a lignin salt and a hard, high melting dark resin which remains after the resin produced by the distillation of wood is extracted with petroleum solvents, said resin characterized by being soluble in alcohol, having a melting point of about 115° C and having abietic acid as the principal constituent thereof, said thickener is boiled starch, and said halide is calcium chloride, barium chloride, or a mixture thereof.
Claim 7
Dependent Claim
79 words
An emulsified, thixotropic pavement material comprising the reaction product between paving grade asphalt and rubber selected from the group consisting of whole tire rubber, reclaimed rubber and partially devulcanized reclaimed rubber, said asphalt and said rubber heated to a temperature within the range of about 350° F to about 500° F and a asphalt-rubber soap consisting essentially of water, an anionic water soluble emulsifying agent, a thickener, and a halide of an alkali metal or an alkaline earth metal.
Claim 8
Dependent Claim
45 words
The emulsified material set forth in claim 7 wherein said anionic water soluble emulsifying agent comprises a soap of an asphalt emulsifier, and wherein said halide is selected from the group consisting of the halides of calcium, barium, magnesium, sodium, potassium, lithium, or mixtures thereof.
Claim 9
Dependent Claim
13 words
The emulsified material set forth in claim 7 wherein said halide is chlorine.
Claim 10
Dependent Claim
14 words
The emulsified material set forth in claim 7 wherein said thickener is boiled starch.
Claim 11
Dependent Claim
36 words
The emulsified material set forth in claim 7 wherein said anionic water soluble emulsifying agent comprises a soap of an asphalt emulsifier and a lignin selected from the group consisting of lignin salt and lignin sulfonate.
Claim 12
Dependent Claim
87 words
The emulsified material set forth in claim 7 wherein said anionic water soluble emulsifying agent comprises a soap of a lignin salt and a hard, high melting dark resin which remains after the resin produced by the distillation of wood is extracted with petroleum solvents, said resin characterized by being soluble in alcohol, having a melting point of about 115° C and having abietic acid as the principal constituent thereof, said thickener is boiled starch, and said halide is calcium chloride, barium chloride, or a mixture thereof.
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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) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |