US3979323A
Expired / Lapsed
US
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Method of making a bituminous emulsion
Assignee: Individual
•
Filing: 1973-08-20
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Granted: 1976-09-07
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Expires: 1993-08-20
Abstract
Abstract A method of making a bituminous emulsion in which a fatty acid is mixed with a water solution of a base to form a water dispersion of said acid. Said dispersion is mixed with an aminoethyl substituted imidazoline to form a water soluble salt of said aminoethyl substituted imidazoline and acid. The salt is dissolved in water and then mixed in an emulsifying mill with a petroleum bitumen, said salt being added to the bitumen in an amount of from about 0.5% to about 2% based upon the weight of the bitumen.
Inventors
- 👤 John Spahr
- 👤 Kenneth E. McConnaughay, deceased
- 👤 executrix Esther L. McConnaughay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/04; C08K5/09
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
A method of making a bituminous emulsion comprising the steps of mixing a straight chain fatty acid containing from 11 to 20 carbon atoms with a water solution of a base having a pH in range of from about 7.5 to about 9.0 to produce a water dispersion of said acid, said water solution containing at least 9 parts of water to one part of said acid, mixing said dispersion with an aminoethyl substituted imidazoline to form an emulsifier, said imidazoline containing an alkyl radical containing from 10-19 carbon atoms, said dispersion being mixed with said imidazoline to provide from about 1.5 to about 2.5 parts of said fatty acid to one part imidazoline, dissolving said emulsifier in water and emulsifying it with a petroleum bitumen to form the finished emulsion, said bitumen being added in an amount to constitute from about 60% to about 75% of said emulsion and said emulsifier being added in an amount of from about 0.5% to about 2% based upon the weight of the bitumen.
Claim 2
Independent Claim
171 words
A method of making a bituminous emulsion comprising the steps of mixing a straight chain fatty acid containing from 11 to 20 carbon atoms with a water solution of a base having a pH in range of from about 7.5 to about 9.0 to produce a water dispersion of said acid, said water solution containing at least 9 parts of water to one part of said acid, mixing said dispersion with an aminoethyl substituted imidazoline to form an emulsifier, said imidazoline containing an alkyl radical containing from 10-19 carbon atoms, said dispersion being mixed with said imidazoline to provide from about 1.5 to about 2.5 parts of said fatty acid to one part imidazoline, dissolving said emulsifier in water and emulsifying it with a petroleum bitumen to form the finished emulsion, said bitumen being added in an amount to constitute from about 60% to about 75% of said emulsion and said emulsifier being added in an amount of from about 0.5% to about 2% based upon the weight of the bitumen.
Claim 3
Dependent Claim
28 words
A method of making a bituminous emulsion as set forth in claim 1 in which said bitumen is diluted with up to about 25% of a petroleum solvent.
Claim 4
Dependent Claim
33 words
A method of making a bituminous emulsion as set forth in claim 2 in which said solvent is selected from the class consisting of naphtha, fuel oil, gas oil, and light cycle oils.
Claim 5
Dependent Claim
55 words
A method of making a bituminous emulsion as set forth in claim 1 in which said step of mixing said dispersion with said imidazoline comprises stirring them together to form a gel, letting said gel stand for from about 15 to 60 minutes, and then restirring said gel to dissipate said gel into a solution.
Claim 6
Independent Claim
128 words
A method of making a bituminous emulsion comprising the steps of mixing a straight chain fatty acid containing from 11 to 20 carbon atoms with a water solution of a base having a pH in the range of from about 7.5 to about 9.0 to form a water dispersion of said acid containing at least 9 parts of water and one part of said acid, mixing said dispersion with an aminoethyl substituted imidazoline containing an alkyl radical containing from 10-19 carbon atoms at a rate to provide from about 1.5 to about 2.5 parts of said fatty acid to one part of said imidazoline to form a water soluble emulsifier salt of said acid and imidazoline, and emulsifying a water solution of said emulsifier with a petroleum bitumen.
Claim 7
Independent Claim
128 words
A method of making a bituminous emulsion comprising the steps of mixing a straight chain fatty acid containing from 11 to 20 carbon atoms with a water solution of a base having a pH in the range of from about 7.5 to about 9.0 to form a water dispersion of said acid containing at least 9 parts of water and one part of said acid, mixing said dispersion with an aminoethyl substituted imidazoline containing an alkyl radical containing from 10-19 carbon atoms at a rate to provide from about 1.5 to about 2.5 parts of said fatty acid to one part of said imidazoline to form a water soluble emulsifier salt of said acid and imidazoline, and emulsifying a water solution of said emulsifier with a petroleum bitumen.
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) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |