US4042582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixtures of disazomethine and monoazo methine compounds, process for their preparation and their use as pigments
Assignee: Hoechst AG
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Filing: 1975-03-25
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Granted: 1977-08-16
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Expires: 1995-03-25
Abstract
Abstract Mixtures of mono- and disazomethine compounds are obtained by reacting 1.2 to 2.5 mols of an optionally substituted m-phenylene diamine with 2 mols of one or more optionally substituted 2-hydroxy-1-naphthaldehydes. The products are pigments having superior properties than the components.
Inventors
- 👤 Theodor Papenfuhs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:00
CPC Classifications
C; C09; C09B; C09B55/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
81 words
A mixture in a molar ratio of 2:1 to 1:3 of water-insoluble azomethine compounds comprising a compound of the formula (Ia) ##STR24## and of the formula (Ib) ##STR25## wherein R 1 , R 2 and R 3 are the same or different and each is hydrogen, halogen, lower alkyl, lower alkoxy, cyano, nitro, lower alkylsulfone, phenylsulfone, lower carboalkoxy, sulfonic acid amide, carboxylic acid amide, sulfonic acid mono-(lower alkyl)-amide, sulfonic acid di-(lower alkyl)-amide, carboxylic acid mono-(lower alkyl)-amide or carboxylic acid di-(lower alkyl)-amide.
Claim 2
Dependent Claim
81 words
A mixture in a molar ratio of 2:1 to 1:3 of water-insoluble azomethine compounds comprising a compound of the formula (Ia) ##STR24## and of the formula (Ib) ##STR25## wherein R 1 , R 2 and R 3 are the same or different and each is hydrogen, halogen, lower alkyl, lower alkoxy, cyano, nitro, lower alkylsulfone, phenylsulfone, lower carboalkoxy, sulfonic acid amide, carboxylic acid amide, sulfonic acid mono-(lower alkyl)-amide, sulfonic acid di-(lower alkyl)-amide, carboxylic acid mono-(lower alkyl)-amide or carboxylic acid di-(lower alkyl)-amide.
Claim 3
Dependent Claim
76 words
A mixture of compounds as defined in claim 1 comprising 2 to 1 mols of a compound of the formula (Ia) ##STR26## and 1 to 3 mols of a compound of the formula (Ib) ##STR27## in which R 1 , R 2 and R 3 are equal or different substituents selected from the group consisting of hydrogen, chlorine, bromine, alkyl of 1 to 3 carbon atoms, alkoxy of 1 to 3 carbon atoms, carbamoyl or acetamino.
Claim 4
Dependent Claim
51 words
A mixture as defined in claim 2, consisting essentially of 2 mols of a compound of formula (Ia) and 1 mol of a compound of formula (Ib) wherein R 1 is hydrogen, chlorine, bromine or methoxy, R 2 is hydrogen, chlorine, bromine or methyl and R.sub. 3 is hydrogen or methoxy.
Claim 5
Dependent Claim
71 words
A mixture as defined in claim 1 obtained by reacting 1.2 to 2.5 mols of one or more amines of the formula (II) ##STR28## with 2 mols of 1 or more aldehydes of the formula (III) ##STR29## in which formulae R is equal or different and defined as in claim 1, in a neutral or acidic aqueous suspension or emulsion at a temperature of 10° to 80° C under mechanical agitation.
Claim 6
Dependent Claim
30 words
A mixture as defined in claim 4, wherein the temperature is at the beginning at 10° to 30° C and is raised during the reaction to 50° to 80° C.
Claim 7
Dependent Claim
30 words
A mixture as defined in claim 5, wherein the temperature is at the beginning about 20° C and is raised at a constant rate to about 60° to 70° C.
Claim 8
Dependent Claim
13 words
A mixture as defined in claim 4, wherein the aqueous medium is neutral.
Claim 9
Dependent Claim
18 words
A mixture as defined in claim 4, wherein the reaction mixture is ground or sheared continuously or intermittantly.
Claim 10
Dependent Claim
15 words
A mixture as defined in claim 4, wherein the reaction is performed under inert gas-cover.
Claim 11
Dependent Claim
11 words
A mixture as defined in claim 1 crystallized as mixed crystals.
Claim 12
Dependent Claim
27 words
A mixture as defined in claim 1 comprising 1 mol of a compound of the formula ##STR30## and 2 mols of the compound of the formula ##STR31##
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) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |