US4059638A
Expired / Lapsed
US
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Trisphenol process
Assignee: Bayer AG
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Filing: 1976-02-24
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Granted: 1977-11-22
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Expires: 1996-02-24
Abstract
Abstract New trisphenols and their preparation by reacting the diacyl compound of dimeric p-isopropenylphenol or of a polycarbonate with a phenol in the presence of a strong acid catalyst at temperatures between -20° and 30° C.
Inventors
- 👤 Heinrich Krimm
- 👤 Erhard Tresper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:54
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/3218; C07; C07C; C07C37/00; C07C37/01; C07C37/055; C07C37/0555; C07C39/00; C07C39/12; C07C39/15; C07C39/16; C07C39/24; C07C39/367; C07C68/00; C07C68/02; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/3215
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
125 words
A process for the production of a trisphenol wherein a compound of the formula ##STR11## wherein: X represents a C 1 -C 6 aliphatic group, a C 1 -C 4 alkoxy group, a phenoxy group, a phenyl group optionally substituted by halogen, nitro or C 1 -C 4 alkyl, or chlorine and n is an integer from 1 to 50, is reacted with a phenol selected from the group consisting of phenol, cresol, chlorophenol, 2,6-dichlorophenol, bromophenol, ethylphenol, propylphenol, isopropylphenol, butylphenol, isobutylphenol, tert.butylphenol, nonylphenol, dodecylphenol, 2,4-dimethylphenol, 3,4-dimethylphenol, 2,6-dimethylphenol, 2,6-diethylphenol, cyclohexylphenol, hydroquinone, resorcinol, pyrocatechol, hydroquinone monomethylether, resorcinol monomethylether and guaiacol in the presence of an acid catalyst at a temperature of from -20° to 30° C. and the resulting acyl derivative is saponified to form the trisphenol.
Claim 2
Dependent Claim
125 words
A process for the production of a trisphenol wherein a compound of the formula ##STR11## wherein: X represents a C 1 -C 6 aliphatic group, a C 1 -C 4 alkoxy group, a phenoxy group, a phenyl group optionally substituted by halogen, nitro or C 1 -C 4 alkyl, or chlorine and n is an integer from 1 to 50, is reacted with a phenol selected from the group consisting of phenol, cresol, chlorophenol, 2,6-dichlorophenol, bromophenol, ethylphenol, propylphenol, isopropylphenol, butylphenol, isobutylphenol, tert.butylphenol, nonylphenol, dodecylphenol, 2,4-dimethylphenol, 3,4-dimethylphenol, 2,6-dimethylphenol, 2,6-diethylphenol, cyclohexylphenol, hydroquinone, resorcinol, pyrocatechol, hydroquinone monomethylether, resorcinol monomethylether and guaiacol in the presence of an acid catalyst at a temperature of from -20° to 30° C. and the resulting acyl derivative is saponified to form the trisphenol.
Claim 3
Dependent Claim
15 words
A process as claimed in claim 1, wherein the acid catalyst is a hydrogen halide.
Claim 4
Dependent Claim
17 words
A process as claimed in claim 1, wherein the reaction is carried out in an inert solvent.
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) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |