Patent US4494992A successfully refreshed from Google Patents.
US4494992A
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Amphoterics as emulsifiers for bituminous emulsions
Assignee: Westvaco Corp
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Filing: 1984-01-18
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Granted: 1985-01-22
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Expires: 2004-01-18
Abstract
Abstract Novel amphoteric emulsifiers are disclosed for solventless and solvent containing mixing grade, oil-in-water anionic and cationic bituminous emulsions, which emulsifiers are the modified reaction products of polyamines with certain polycarboxylic acids and sulfonated carboxylic acids. Modifications are carried out by reacting the nitrogen-containing intermediates with formaldehyde and sodium sulfite or bisulfite, chloroalkane sulfonic acid salts, gamma -propane sultone, chloroalkane phosphonic acids, acrylic acid, fumaric acid, maleic acid and chloroethanoic acid.
Inventors
- 👤 Peter Schilling
- 👤 Hans G. Schreuders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:33
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08K; C08K5/00; C08K5/0008; C08J2395/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
Amphoteric emulsifiers for anionic and cationic bituminous emulsions consisting of reaction products of nitrogen-containing intermediates with compounds selected from the group consisting of formaldehyde and sodium sulfite or bisulfite, chloroalkane sulfonic acid salts, γ-propane sultone, chloromethane phosphonic acid, acrylic acid, fumaric acid, maleic acid and chloroalkanoic acids, wherein the nitrogen-containing intermediates are selected from the group of reaction products of polyamines reacted with sulfonated carboxylic acids and polyamines reacted with polycarboxylic acids corresponding to the formulae ##STR13## wherein x and y are integers from 3 to 9, x and y together equal 12, at least one Z is a carboxylic acid group and any remaining Z is hydrogen.
Claim 2
Dependent Claim
108 words
Amphoteric emulsifiers for anionic and cationic bituminous emulsions consisting of reaction products of nitrogen-containing intermediates with compounds selected from the group consisting of formaldehyde and sodium sulfite or bisulfite, chloroalkane sulfonic acid salts, γ-propane sultone, chloromethane phosphonic acid, acrylic acid, fumaric acid, maleic acid and chloroalkanoic acids, wherein the nitrogen-containing intermediates are selected from the group of reaction products of polyamines reacted with sulfonated carboxylic acids and polyamines reacted with polycarboxylic acids corresponding to the formulae ##STR13## wherein x and y are integers from 3 to 9, x and y together equal 12, at least one Z is a carboxylic acid group and any remaining Z is hydrogen.
Claim 3
Dependent Claim
80 words
The amphoteric emulsifier of claim 1 wherein the nitrogen-containing intermediate is the reaction product of a blend of polyethylene amines consisting of diethylene triamine, triethylene tetramine, aminoethylpiperazine and aminoethylethanolamine and the C 21 -dicarboxylic acid corresponding to the formula ##STR14## wherein x and y are integers from 3 to 9, x and y together equal 12, one Z is a carboxylic acid group and the remaining Z is hydrogen, and the nitrogen-containing intermediate is reacted with formaldehyde and sodium bisulfite.
Claim 4
Dependent Claim
27 words
The amphoteric emulsifier of claim 1 wherein the sulfonated carboxylic acids are selected from the group consisting of sulfonated tall oil fatty acid and sulfonated oleic acid.
References Cited (Backward Citations)
US3123569A
Cited
US2329086A
Cited
US2743288A
Cited
US2966478A
Cited
US3006860A
Cited
US3097174A
Cited
US3062829A
Cited
US3230104A
Cited
US3220953A
Cited
US3350321A
Cited
GB1046208A
Cited
US3445258A
Cited
US3344082A
Cited
US3466247A
Cited
US3518101A
Cited
US3738852A
Cited
US3728278A
Cited
US3594201A
Cited
US3764359A
Cited
GB1278421A
Cited
US3615796A
Cited
US3867162A
Cited
US3753968A
Cited
CH571474A5
Cited
US3957524A
Cited
US3956002A
Cited
US4088505A
Cited
US3899476A
Cited
US4013601A
Cited
US4081462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |