US4224455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonated alkoxylated alkyl arylol maleate reactive surfactants
Assignee: Stepan Co
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Filing: 1978-11-13
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Granted: 1980-09-23
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Expires: 1998-11-13
Abstract
Abstract New reactive surfactants or emulsifiers useful in a broad range of emulsion polymerization processes are provided, along with processes for making and using such. The reactive surfactants are comprised of ring sulfonated half esters of maleic anhydride with alkoxylated alkyl arylols.
Inventors
- 👤 Julius H. Deutsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:33
CPC Classifications
C; C07; C07C; C07C309/00; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/321; C08G65/326; C08G65/3265; C09; C09K; C09K23/00; C09K23/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
67 words
A reactive surfactant characterized by the formula ##STR7## wherein R 1 is selected from the group consisting of ethylene, propylene, and mixtures thereof, R 2 is an alkyl group containing from 8 to 18 carbon atoms, X is selected from the group consisting of hydrogen, alkali metals, lower alkanal amines, lower alkyl amines, and ammonium, and n is a positive number of from about 2 to 50.
Claim 2
Dependent Claim
67 words
A reactive surfactant characterized by the formula ##STR7## wherein R 1 is selected from the group consisting of ethylene, propylene, and mixtures thereof, R 2 is an alkyl group containing from 8 to 18 carbon atoms, X is selected from the group consisting of hydrogen, alkali metals, lower alkanal amines, lower alkyl amines, and ammonium, and n is a positive number of from about 2 to 50.
Claim 3
Dependent Claim
12 words
A reactive surfactant of claim 1 wherein X is an alkali metal.
Claim 4
Dependent Claim
10 words
A reactive surfactant of claim 1 wherein X is hydrogen.
Claim 5
Dependent Claim
13 words
A reactive surfactant of claim 1 wherein X is a lower alkanol amine.
Claim 6
Dependent Claim
11 words
A reactive surfactant of claim 1 wherein R 1 is ethylene.
Claim 7
Dependent Claim
11 words
A reactive surfactant of claim 5 wherein R 2 is nonyl.
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) | 1983-09-23 | 1984-03-24 | 1984-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-23 | 1988-03-24 | 1988-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-23 | 1992-03-24 | 1992-09-23 | $7700.00 | Window Closed / Lapsed |