US4978755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perylenetetracarboxylic acid diimides having long-chain radicals containing carbonyl groups
Assignee: BASF Corp
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Filing: 1989-07-24
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Granted: 1990-12-18
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Expires: 2009-07-24
Abstract
Abstract Perylene-3,4,9,10-tetracarboxylic acid diimides of the formula I ##STR1## in which R is a linar or branched alkylene, alkylenecycloalkylene or cycloalkylenealkylene radical which has at least 15 C atoms and which is interrupted by one or two --COO--, --OOC--, --CONH-- and/or --NHCO-- groups, and Z is hydrogen, hydroxyl or a --COOH group. Perylene diimides of this type are exellently suitable for coloring polyolefins. In this regard, they are particularly distinguished by their low tendency to bloom. They are also very suitable for coloring engineering plastics, in which they produce fluoroescent colorations having a high fluoroescence and excellent fatness to heat, light and weathering.
Inventors
- 👤 Fridolin Babler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:07
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3437; C09; C09B; C09B5/00; C09B5/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A perylene-3,4,9,10-tetracarboxylic acid dimimide of the formula I ##STR10## in which RZ is a --(CH 2 ) 11 --COOC 12 H 25 or --(CH 2 ) 11 --COOC 18 H 37 group.
Claim 2
Dependent Claim
32 words
A perylene-3,4,9,10-tetracarboxylic acid dimimide of the formula I ##STR10## in which RZ is a --(CH 2 ) 11 --COOC 12 H 25 or --(CH 2 ) 11 --COOC 18 H 37 group.
References Cited (Backward Citations)
GB1225566A
Cited
DE2616486A1
Cited
SU703554A1
Cited
US4238386A
Cited
US4667036A
Cited
DE3413418A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-17 | 1994-06-18 | 1994-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-17 | 1998-06-18 | 1998-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-17 | 2002-06-18 | 2002-12-18 | $7700.00 | Window Closed / Lapsed |