Patent US4513109A successfully refreshed from Google Patents.
US4513109A
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US
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Phenols and use thereof as stabilizers
Assignee: BASF Corp
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Filing: 1984-01-27
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Granted: 1985-04-23
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Expires: 2004-01-27
Abstract
Abstract The invention relates to phenols which contain a number of aromatic nuclei and in which the bridge formation of these nuclei is in the meta-position to the OH groups. These phenols have the formula I, wherein R 1 , R 2 , R 3 and R 4 are as defined in claim 1. The novel phenols are most suitable for use as stabilizers for organic polymers and lubricants and have particularly good color properties.
Inventors
- 👤 Siegfried Rosenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:57
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/12; C09K15/14; C07; C07C; C07C323/00; C07C39/00; C07C39/12; C07C39/15; C07C39/16; C07C39/17; C07C43/00; C07C43/02; C07C43/03; C07C43/14; C07C43/178; C07C43/1782; C07C43/1785; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C09K15/06; C09K15/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
A compound of formula I ##STR5## wherein R 1 and R 4 are methyl, R 2 and R 3 are each a radical of formula II ##STR6## wherein R 6 is C 1 -C 12 alkyl, C 5 -C 8 cycloalkyl, C 6 -C 10 aryl, C 7 -C 10 aralkyl or C 7 -C 10 alkaryl and R 7 is C 4 -C 12 alkyl, C 5 -C 8 cycloalkyl, C 6 -C 10 aryl, C 7 -C 10 aralkyl or C 7 -C 10 alkaryl.
Claim 2
Dependent Claim
87 words
A compound of formula I ##STR5## wherein R 1 and R 4 are methyl, R 2 and R 3 are each a radical of formula II ##STR6## wherein R 6 is C 1 -C 12 alkyl, C 5 -C 8 cycloalkyl, C 6 -C 10 aryl, C 7 -C 10 aralkyl or C 7 -C 10 alkaryl and R 7 is C 4 -C 12 alkyl, C 5 -C 8 cycloalkyl, C 6 -C 10 aryl, C 7 -C 10 aralkyl or C 7 -C 10 alkaryl.
Claim 3
Dependent Claim
15 words
A compound according to claim 1 wherein R 6 and R 7 are each tert-butyl.
Claim 4
Dependent Claim
9 words
The compound according to claim 1 which is 3,5-di-(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylphenol.
Claim 5
Dependent Claim
15 words
A lubricating oil stabilized with an effective amount of a compound according to claim 1.
Claim 6
Dependent Claim
31 words
A stabilized polymer composition which comprises (a) a graft polymer based on acrylonitrile, butadiene and styrene or impact-resistant polystyrene, and (b) an effective amount of a compound according to claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-22 | 1988-10-22 | 1989-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-22 | 1992-10-22 | 1993-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-22 | 1996-10-22 | 1997-04-23 | $7700.00 | Window Closed / Lapsed |