US3956002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anionic bituminous emulsions
Assignee: Westvaco Corp
•
Filing: 1974-03-18
•
Granted: 1976-05-11
•
Expires: 1994-03-18
Abstract
Abstract There is disclosed herein oil-in-water anionic bituminous emulsions which comprise from about 30% to about 75% by weight of the emulsion of bitumen as the dispersed phase, and from about 0.1% to about 10.0% by weight of an anionic emulsifier consisting of an oxygenated alkali lignin, an ethylene oxide adduct of phenol, and 0% to about 10% by weight of sodium borate and water in an amount to make up 100% by weight as the continuous phase.
Inventors
- 👤 Howard H. Moorer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:06
CPC Classifications
C; C08; C08L; C08L95/00; C08L95/005; C08K; C08K3/00; C08K3/38; C08K5/00; C08K5/04; C08K5/13; C08L97/00; C08L97/005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
An oil-in-water anionic bituminous emulsion which comprises, a. from about 30% to about 75% by weight of the emulsion of bitumen as the disperse phase, b. from about 0.1% to about 10.0% by weight of an anionic emulsifier consisting of an oxygenated alkali lignin produced by bubbling oxygen or air through a solution of alkali lignin at a pH between 10 and 13 and at a temperature of 50°C to 100°C and an ethylene oxide adduct of an aklyl phenol in a weight ratio of 10:1 to 1:10 of lignin to an alkyl phenol adduct, and from 0% to about 10% by weight sodium borate, and c. water in an amount to make up 100% by weight as the continuous phase.
Claim 2
Dependent Claim
121 words
An oil-in-water anionic bituminous emulsion which comprises, a. from about 30% to about 75% by weight of the emulsion of bitumen as the disperse phase, b. from about 0.1% to about 10.0% by weight of an anionic emulsifier consisting of an oxygenated alkali lignin produced by bubbling oxygen or air through a solution of alkali lignin at a pH between 10 and 13 and at a temperature of 50°C to 100°C and an ethylene oxide adduct of an aklyl phenol in a weight ratio of 10:1 to 1:10 of lignin to an alkyl phenol adduct, and from 0% to about 10% by weight sodium borate, and c. water in an amount to make up 100% by weight as the continuous phase.
Claim 3
Dependent Claim
25 words
An oil-in-water anionic emulsion as defined in claim 1 wherein said bitumen is asphalt in an amount from about 55% to about 65% by weight.
Claim 4
Dependent Claim
26 words
An oil-in-water anionic emulsion as defined in claim 1 wherein the pH of the emulsion is adjusted to between about 10 and 12 prior to using.
Claim 5
Dependent Claim
39 words
An oil-in-water anionic emulsion as defined in claim 1 wherein said anionic emulsifier is present in an amount from about 0.5% to about 3.0% and said lignin to alkyl phenol adduct ratio is between 7:3 and 4:6 by weight.
Claim 6
Dependent Claim
29 words
An oil-in-water anionic emulsion as defined in claim 1 wherein said alkyl phenol is nonyl phenol and the adduct contains from 10 moles to 100 moles of ethylene oxide.
Claim 7
Dependent Claim
24 words
An oil-in-water anionic emulsion as defined in claim 1 wherein said nonyl phenol adduct contains from 30 moles to 50 moles of ethylene oxide.
Claim 8
Dependent Claim
26 words
An oil-in-water anionic emulsion as defined in claim 1 wherein said sodium borate is present in an amount from about 1% to about 5% by weight.
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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |