US3871893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lignin amines as asphalt emulsifiers
Assignee: Westvaco Corp
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Filing: 1972-06-21
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Granted: 1975-03-18
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Expires: 1992-06-21
Abstract
Abstract Lignin amines are formed by reacting a secondary or a tertiary amine and a halohydrin with lignin. The amine and halohydrin are preferably reacted together to form a glycidylamine intermediate. From 1-10 moles of the glycidylamine intermediate per 1,000 grams of lignin are then reacted together. In preferred embodiments of the invention, the halohydrin is epichlorohydrin, the secondary amine is dimethyl and the tertiary amine is trimethyl amine. These lignin amines are useful as surface active agent, especially in cationic asphalt emulsions.
Inventors
- 👤 Joseph B Doughty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:53
CPC Classifications
C; C08; C08H; C08H6/00; C08L; C08L95/00; C08L95/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
AN OIL-IN-WATER CATIONIC BITUMINOUS EMULSION OF IMPROVED MECHANICAL STABILITY WHICH COMPRISES, FROM ABOUT 30 TO ABOUT 75% BY WEIGHT OF BITUMEN AS THE DISPERSED PHASE, FROM ABOUT 0.2 TO ABOUT 2.5% BY WEIGHT OF A WATERSOLUBLE SALT OF A LIGNIN AMINE PRODUCCT OF THE REACTION OF FROM 1 TO 10 MOLES OF A GLYCIDYL/TERTIARY AMINE INTERMEDIATE PER 1000 GRAMS LIGNIN AS THE CATION ACTIVE EMULSIFIER FOR DISPERSING SAID BITUMEN IN WATER AND WATER TO MAKE UP 100% BY WEIGHT AS THE CONTINUOUS PHASE, THE PH OF THE EMULSION BEING ADJUSTED TO A VALUE IN THE RANGE FROM ABOUT 1 TO 3.
Claim 2
Dependent Claim
101 words
AN OIL-IN-WATER CATIONIC BITUMINOUS EMULSION OF IMPROVED MECHANICAL STABILITY WHICH COMPRISES, FROM ABOUT 30 TO ABOUT 75% BY WEIGHT OF BITUMEN AS THE DISPERSED PHASE, FROM ABOUT 0.2 TO ABOUT 2.5% BY WEIGHT OF A WATERSOLUBLE SALT OF A LIGNIN AMINE PRODUCCT OF THE REACTION OF FROM 1 TO 10 MOLES OF A GLYCIDYL/TERTIARY AMINE INTERMEDIATE PER 1000 GRAMS LIGNIN AS THE CATION ACTIVE EMULSIFIER FOR DISPERSING SAID BITUMEN IN WATER AND WATER TO MAKE UP 100% BY WEIGHT AS THE CONTINUOUS PHASE, THE PH OF THE EMULSION BEING ADJUSTED TO A VALUE IN THE RANGE FROM ABOUT 1 TO 3.
Claim 3
Dependent Claim
16 words
An oil-in-water type cationic bituminous emulsion as defined in claim 1, wherein said bitumen is asphalt.
Claim 4
Dependent Claim
27 words
An oil-in-water type cationic bituminous emulsion as defined in claim 1 wherein said glycidyl/tertiary amine intermediate is formed by the reaction of epichlorohydrin and a tertiary amine.
Claim 5
Dependent Claim
36 words
An oil-in-water type cationic bituminous emulsion as defined in claim 1 wherein said lignin amine product is of a reaction of from 2 to 10 moles of a glycidyl/tertiary amine intermediate per 1,000 grams of lignin.
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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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |