US3758597A
Expired / Lapsed
US
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2-(hydroxyphenyl)-2-(isopropenylphenyl)-propanes, process for their manufacture
Assignee: Bayer AG
•
Filing: 1970-09-29
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Granted: 1973-09-11
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Expires: 1990-09-29
Abstract
Abstract The present invention relates to a 2-(2-or 4-hydroxyphenyl)-2(3- or 4-isopropenyl-phenyl)-propanes of the formula IN WHICH R1 and R2 are identical or different and denote hydrogen, halogen, hydroxyl, alkyl, cycloalkyl or alkoxy with up to 6 carbon atoms, and a process for their manufacture and their use for the manufacture of polymers.
Inventors
- 👤 D Margotte
- 👤 H Buysch
- 👤 H Krimm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:11
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/18; C07; C07C; C07C37/00; C07C37/11; C07C37/14; C07C37/16; C07C39/00; C07C39/205; C07C39/21; C07C39/24; C07C39/373; C08F; C08F16/00; C08F16/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
30 words
A process for the production of a 2-(hydroxyphenyl)-2-(isopropenylphenyl)-propane of claim 1 in which comprises alkylating a phenol having at least one free o-position or p-position which is of the formula
Claim 2
Dependent Claim
17 words
A process according to claim 2 in which the reaction is carried out at 150* to 300*C.
Claim 3
Dependent Claim
26 words
A process according to claim 2 in which the reaction is stopped when 10-50 percent of the theoretical amount of the alkylating agent has been converted.
Claim 4
Dependent Claim
23 words
A process according to claim 2 in which the amount of catalyst is from 0.01 to 15 percent by weight of the phenol.
Claim 5
Dependent Claim
24 words
A process according to claim 2 in which the amount of the catalyst is from 0.1 to 10 percent by weight of the phenol.
Claim 6
Dependent Claim
10 words
A process according to claim 2 carried out in bulk.
Claim 7
Dependent Claim
14 words
A process according to claim 2 carried out in the presence of a solvent.
Claim 8
Dependent Claim
43 words
A process according to claim 2 wherein said alkylation is carried out in the presence of a catalyst selected from the group consisting of acetic acid, butyric acid, benzoic acid, dimethylacetic acid, adipic acid, isophthalic acid, zinc acetate, iron propionate and ammonium acetate.
References Cited (Backward Citations)
CA750015A
Cited
US3004953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |