US3960928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of condensation products from phenols and polyacetoacetic acid esters
Assignee: Hoechst AG
•
Filing: 1975-03-07
•
Granted: 1976-06-01
•
Expires: 1995-03-07
Abstract
Abstract Polyphenol-carboxylic acid esters are prepared from definite phenols and polyacetoacetic acid esters by condensing the components in the presence of hydrogen chloride at a temperature of from -10° to +15°C, using ethyl mercaptan as catalyst; the obtained esters are useful as fungicides or bactericides as well as for stabilizing plastic resins and manufacture of varnishing resins.
Inventors
- 👤 Otto Mauz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:03
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/10; C08K5/101; C08K5/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
In a process for the manufacture of a polyphenol-carboxylic acid ester from phenols of general formula I ##SPC2## and polyacetoacetic acid esters of general formula II ##EQU2## in which formulae R 1 and R 2 each stand for hydrogen atoms, identical or different alkyl radicals having 1 to 4 carbon atoms, R 3 represents a saturated, straight chain or branched aliphatic, cycloaliphatic hydrocarbon radical having from 2 to 12 carbon atoms or R 3 is p-phenylene, m-phenylene, or a naphthylene and n is 2 to 4, the improvement of which comprises condensing the reaction components I and II at a temperature of from -10° to +15°C in the presence of gaseous hydrogen chloride and 0.05 to 0.5 % by weight of ethyl mercaptan, calculated on the polyacetoacetic acid ester.
Claim 2
Dependent Claim
129 words
In a process for the manufacture of a polyphenol-carboxylic acid ester from phenols of general formula I ##SPC2## and polyacetoacetic acid esters of general formula II ##EQU2## in which formulae R 1 and R 2 each stand for hydrogen atoms, identical or different alkyl radicals having 1 to 4 carbon atoms, R 3 represents a saturated, straight chain or branched aliphatic, cycloaliphatic hydrocarbon radical having from 2 to 12 carbon atoms or R 3 is p-phenylene, m-phenylene, or a naphthylene and n is 2 to 4, the improvement of which comprises condensing the reaction components I and II at a temperature of from -10° to +15°C in the presence of gaseous hydrogen chloride and 0.05 to 0.5 % by weight of ethyl mercaptan, calculated on the polyacetoacetic acid ester.
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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |