US4609696A
Expired / Lapsed
US
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Rubberized asphalt emulsion
Assignee: Union Oil Company of California
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Filing: 1985-05-24
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Granted: 1986-09-02
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Expires: 2005-05-24
Abstract
Abstract This invention provides emulsions of rubberized asphalt, which are preferably extended with oil and are especially useful for chip seal, slurry seal and cold mix applications. The novel composition may be prepared by passing an aqueous surfactant-containing solution and a homogeneous gel, comprising rubberized asphalt or oil-extended rubberized asphalt through a colloid mill to provide an emulsion having a small and uniform particle size.
Inventors
- 👤 Elizabeth Wilkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:14
CPC Classifications
C; C08; C08L; C08L95/00; C08L95/005
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
80 words
A method of making a rubberized asphalt composition which comprises the steps of: (a) combining asphalt with a hydrocarbon oil having a flash point of 300° F. or more to provide a homogenous asphalt-oil mixture or solution, (b) then combining said asphalt-oil mixture with a particulate rubber at a temperature sufficient to provide a homogenous asphalt-rubber-oil gel, and (c) emulsifying said asphalt-rubber-oil gel by passing said gel, water, and an emulsifying agent through a colloid mill to provide an emulsion.
Claim 2
Independent Claim
80 words
A method of making a rubberized asphalt composition which comprises the steps of: (a) combining asphalt with a hydrocarbon oil having a flash point of 300° F. or more to provide a homogenous asphalt-oil mixture or solution, (b) then combining said asphalt-oil mixture with a particulate rubber at a temperature sufficient to provide a homogenous asphalt-rubber-oil gel, and (c) emulsifying said asphalt-rubber-oil gel by passing said gel, water, and an emulsifying agent through a colloid mill to provide an emulsion.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said particulate rubber comprises a hydrocarbon rubber.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein said hydrocarbon rubber is reclaimed tire rubber.
Claim 5
Dependent Claim
16 words
The method of claim 3 wherein said reclaimed tire rubber consists essentially of -20 mesh material.
Claim 6
Dependent Claim
43 words
The method of claim 2 wherein said hydrocarbon oil is a heavy fraction of petroleum, coal tar, tar sand oils or shale oils boiling in the range of about 700° to 1100° F. and having a gravity ranging between 3° and 12° API.
Claim 7
Dependent Claim
22 words
The method of claim 2 wherein said asphalt has an absolute viscosity at 140° F. of from about 250 to 4,000 poise.
Claim 8
Dependent Claim
23 words
The method of claim 2 wherein the emulsifying agent comprises a surfactant selected from the group consisting of anionic, cationic and amphoteric surfactants.
Claim 9
Dependent Claim
19 words
The method of claim 2 wherein said emulsion comprises from about 30 to about 40 percent water, by weight.
Claim 10
Dependent Claim
29 words
The method of claim 2 wherein said asphalt-rubber-oil gel comprises from about 1 to about 10 percent rubber and from about 1 to about 15 percent oil, by weight.
Claim 11
Dependent Claim
21 words
The method of claim 7 wherein said surfactant comprises from about 0.5 to about 1.5 percent, by weight, of said emulsion.
Claim 12
Independent Claim
57 words
A method of making a rubberized asphalt composition which comprises the steps of: (a) combining a particulate rubber comprising reclaimed tire rubber with asphalt at a temperature sufficient to provide a homogenous asphalt-rubber gel, and (b) emulsifying said asphalt-rubber gel by passing said gel, water, and an emulsifying agent through a colloid mill to provide an emulsion.
Claim 13
Dependent Claim
16 words
The method of claim 11 wherein said reclaimed tire rubber consists essentially of -20 mesh material.
Claim 14
Dependent Claim
22 words
The method of claim 11 wherein said asphalt has an absolute viscosity at 140° F. of from about 250 to 4,000 poise.
Claim 15
Dependent Claim
23 words
The method of claim 11 wherein the emulsifying agent comprises a surfactant selected from the group consisting of anionic, cationic and amphoteric surfactants.
Claim 16
Dependent Claim
19 words
The method of claim 11 wherein said emulsion comprises from about 30 to about 40 percent water, by weight.
Claim 17
Dependent Claim
21 words
The method of claim 14 wherein said surfactant comprises from about 0.5 to about 1.5 percent, by weight, of said emulsion.
Claim 18
Dependent Claim
8 words
The rubberized asphalt emulsion product of claim 1.
Claim 19
Dependent Claim
8 words
The rubberized asphalt emulsion product of claim 11.
Claim 20
Dependent Claim
8 words
The rubberized asphalt emulsion product of claim 9.
Claim 21
Dependent Claim
32 words
A rubberized asphalt emulsion composition consisting essentially of a gel, containing asphalt, rubber, and a hydrocarbon oil having a flash point of 300° F. or more, emulsified in a surfactant-containing aqueous solution.
Claim 22
Dependent Claim
32 words
A rubberized asphalt emulsion composition consisting essentially of a gel, containing asphalt, rubber, and a hydrocarbon oil having a flash point of 300° F. or more, emulsified in a surfactant-containing aqueous solution.
Claim 23
Dependent Claim
28 words
The composition of claim 20 wherein said gel comprises from about 1 to about 10 percent rubber and from about 1 to about 15 percent oil, by weight.
Claim 24
Dependent Claim
19 words
The composition of claim 21 wherein said composition comprises from about 30 to about 40 percent water, by weight.
Claim 25
Dependent Claim
19 words
The composition of claim 22 wherein said composition comprises from about 0.5 to about 1.5 percent, by weight, surfactant.
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) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |