US4665163A
Expired / Lapsed
US
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Diaryl pigments with improved heat stability obtained by coupling bis-diazotized diamines with acetoacetanilides
Assignee: Hoechst AG
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Filing: 1983-06-23
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Granted: 1987-05-12
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Expires: 2003-06-23
Abstract
Abstract Diaryl pigments having an excellent stability to heat are obtained by carrying out the coupling of bis-diazotized 3,3'-dichloro-4,4'-diaminobiphenyl with acetoacetanilides in the presence of an added quantity of acetoacetanilides which are monosubstituted or disubstituted in the 3-position or 4-position of the nucleus. As a result of their good heat stability, these pigments are particularly suitable for pigmenting plastics having processing temperatures above 200° C.
Inventors
- 👤 Klaus Hunger
- 👤 Heinrich Frolich
- 👤 Hans-Joachim Lenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:56
CPC Classifications
C; C07; C07C; C07C53/00; C07C53/126; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/08; C09B35/10; C09B35/105
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
169 words
A diaryl pigment obtained by coupling bis-diazotized 3,3'-dichloro-4,4'-diaminobiphenyl with an acetoacetanilide of the formula I ##STR30## in which the Rs are identical or different and each of the Rs represents a member selected from the group consisting of hydrogen, chlorine, methyl, methoxy and ethoxy, and n denotes an interger from 1 to 3, the coupling being carried out in the presence of about 1 to 3 mole %, relative to said acetoacetanilide of formula I of a component consisting essentially of a compound of the formula II ##STR31## in which R 1 and r 2 each denote the radical ##STR32## or one of the radicals R 1 and R 2 denotes hydrogen and the other denotes a radical selected from the group consisting of ##STR33## and -SO 2 NH 2 , or R 1 and R 2 linked to one another denote a divalent radical selected from the group consisting of ##STR34## the CO group being attached to the phenyl nucleus either via the 3-position or via the 4-position.
Claim 2
Dependent Claim
169 words
A diaryl pigment obtained by coupling bis-diazotized 3,3'-dichloro-4,4'-diaminobiphenyl with an acetoacetanilide of the formula I ##STR30## in which the Rs are identical or different and each of the Rs represents a member selected from the group consisting of hydrogen, chlorine, methyl, methoxy and ethoxy, and n denotes an interger from 1 to 3, the coupling being carried out in the presence of about 1 to 3 mole %, relative to said acetoacetanilide of formula I of a component consisting essentially of a compound of the formula II ##STR31## in which R 1 and r 2 each denote the radical ##STR32## or one of the radicals R 1 and R 2 denotes hydrogen and the other denotes a radical selected from the group consisting of ##STR33## and -SO 2 NH 2 , or R 1 and R 2 linked to one another denote a divalent radical selected from the group consisting of ##STR34## the CO group being attached to the phenyl nucleus either via the 3-position or via the 4-position.
Claim 3
Dependent Claim
17 words
A diaryl pigment as claimed in claim 1, wherein 5-acetoacetylamino-benzimidazolone is the composed of the formula II.
Claim 4
Dependent Claim
17 words
A diaryl pigment as claimed in claim 1 wherein acetoacetylamino-2,5-dimethoxy-4-chlorobenzene is the acetoacetanilide of the formula I.
References Cited (Backward Citations)
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FR90694E
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GB1111050A
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US3529984A
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GB1111490A
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JPS5589356A
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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) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |