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US4436933A
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Polymeric ethylene oxide/propylene oxide or ethylene oxide/butylene oxide ether carboxylic acids, a process for their preparation and their use
Assignee: Hoechst AG
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Filing: 1982-08-31
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Granted: 1984-03-13
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Expires: 2002-08-31
Abstract
Abstract Polymeric ethylene oxide/propylene oxide or ethylene oxide/butylene oxide ether carboxylic acids of the formula ##STR1## wherein R denotes methyl or ethyl, preferably methyl, A denotes hydrogen or a metal cation, preferably Na.sup.(+) or K.sup.(+), X and Z together denote a number from 2 to 360, preferably from 2 to 140, y denotes a number from 15 to 70, preferably from 25 to 70 and n denotes a number from 1 to 10, a process for their preparation and their use as surfactants.
Inventors
- 👤 Helmut Diery
- 👤 Norbert Wester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:38
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0084; C09B67/0085; C09B67/0089; C08; C08G; C08G16/00; C08G16/02; C08G16/0212; C08G16/0218; C08G16/0225; C08G65/00; C08G65/02; C08G65/32; C08G65/321; C08G65/326; C08G65/329; C08G65/331; C08G65/3311; C08G65/3314; C08G65/3315; C08G65/3317; C08G65/332; C08G65/3322; C09K; C09K23/00; C09K23/42; C09K23/44; Y; Y10; Y10S; Y10S526/00; Y10S526/911
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
A polymeric ethylene oxide/propylene oxide or ethylene oxide/butylene oxide ether carboxylic acid of the formula ##STR7## wherein R denotes methyl or ethyl, preferably methyl, A denotes hydrogen or a metal cation, preferably Na.sup.(+) or K.sup.(+), X and Z together denote a number from 2 to 360, preferably from 2 to 140, y denoted a number from 15 to 70, preferably from 25 to 70 and n denotes a number from 1 to 10.
Claim 2
Dependent Claim
73 words
A polymeric ethylene oxide/propylene oxide or ethylene oxide/butylene oxide ether carboxylic acid of the formula ##STR7## wherein R denotes methyl or ethyl, preferably methyl, A denotes hydrogen or a metal cation, preferably Na.sup.(+) or K.sup.(+), X and Z together denote a number from 2 to 360, preferably from 2 to 140, y denoted a number from 15 to 70, preferably from 25 to 70 and n denotes a number from 1 to 10.
Claim 3
Dependent Claim
38 words
A process for the preparation of the compound as claimed in claim 1, which comprises reacting a compound of the formula II ##STR8## in the presence of an acid catalyst, with glyoxylic acid and then, if appropriate, neutralizing.
Claim 4
Dependent Claim
20 words
The use of the compound as claimed in claim 1 as a wetting agent and dispersant, dyeing auxiliary and emulsifier.
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) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |