US4767844A
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Azo lake pigments
Assignee: DIC Corp
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Filing: 1987-08-21
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Granted: 1988-08-30
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Expires: 2007-08-21
Abstract
Abstract An azo lake pigment is obtained by coupling an aromatic diazo component having a sulfonic acid group with a mixture of 2-hydroxy-3-naphthoic acid and a 2-hydroxy-3-naphthoic acid derivative represented by formula [I] <IMAGE> [I] wherein R represents a hydrogen atom, a naphthalene residue, a cyclohexyl group, or a group of the formula <IMAGE> in which each of X, Y and Z represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, an acetylamino group, a benzoylamino group, a carbomoyl group or a phenylcarbamoyl group, and X and Y together may form a cyclized benzimidazolone, benzthiazole or benzoxazole group, and laking the resulting dye with an alkaline earth metal salt or a manganese salt.
Inventors
- 👤 Hirohito Ando
- 👤 Zenji Takada
- 👤 Shigeto Aoki
- 👤 Yuko Shigeta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:33
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0033; C09B67/0046; C09B67/0051; C09B29/00; C09B29/10; C09B29/18; C09B29/20; C09B63/00; C09B63/005; Y; Y10; Y10S; Y10S534/00; Y10S534/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
An azo lake pigment obtained by laking a dye with an alkaline earth metal salt or a manganese salt, said dye being obtained by coupling an aromatic diazo component having a sulfonic acid group with a mixture of 2-hydroxy-3-naphthoic acid and a 2-hydroxy-3-naphthoic acid derivative represented by the formula (I) ##STR37## wherein R represents hydrogen, naphthalene, cyclohexyl, or a group of the formula ##STR38## in which each of X, Y and Z, independently, represents hydrogen, lower alkyl, lower alkoxy trifluoromethyl, halogen, acetylamino, benzoylamino, carbamoyl or phenylcarbamoyl, or X and Y together form a cyclized benzimidazolone, benzothiazole or benzoxazole.
Claim 2
Dependent Claim
98 words
An azo lake pigment obtained by laking a dye with an alkaline earth metal salt or a manganese salt, said dye being obtained by coupling an aromatic diazo component having a sulfonic acid group with a mixture of 2-hydroxy-3-naphthoic acid and a 2-hydroxy-3-naphthoic acid derivative represented by the formula (I) ##STR37## wherein R represents hydrogen, naphthalene, cyclohexyl, or a group of the formula ##STR38## in which each of X, Y and Z, independently, represents hydrogen, lower alkyl, lower alkoxy trifluoromethyl, halogen, acetylamino, benzoylamino, carbamoyl or phenylcarbamoyl, or X and Y together form a cyclized benzimidazolone, benzothiazole or benzoxazole.
Claim 3
Dependent Claim
39 words
The azo lake pigment of claim 1 wherein the aromatic diazo component having a sulfonic acid group is at least one compound selected from the group consisting of aminobenzenesulfonic acids, aminonaphthalenesulfonic acids, aminonaphthalenedisulfonic acids, 4-(4'-amino-3'-methoxyphenylazo)-benzenesulfonic acid and 4,4'-diaminodiphenyl-2,2'-disulfonic acid.
Claim 4
Dependent Claim
43 words
The azo lake pigment of claim 1 wherein the aromatic diazo component having a sulfonic acid group is at least one compound selected from the group consisting of 2-aminobenzenesulfonic acid, 4-aminobenzenesulfonic acid, 2-amino-5-methylbenzenesulfonic acid, 2-amino-5-methylbenzenesulfonic acid, 2-amino-5-chloro-4-methylbenzenesulfonic acid, 2-amino-4-chloro-5-methylbenzenesulfonic acid and 2-amino-1-naphthalenesulfonic acid.
Claim 5
Dependent Claim
37 words
The azo lake pigment of claim 1 wherein the coupling component is a mixture of 50 to 99% by weight of 2-hydroxy-3-naphthoic acid and 50 to 1% by weight of the 2-hydroxy-3-naphthoic acid derivative of formula (I).
Claim 6
Dependent Claim
24 words
The azo lake pigment of claim 1 or 4 wherein the 2-hydroxy-3-naphthoic acid derivative of formula (I) is 2-hydroxy-3-naphthamide, 2-hydroxy-3-naphthanilide or a mixture thereof.
Claim 7
Dependent Claim
47 words
The azo lake pigment of claim 1 wherein the alkaline earth metal salt or manganese salt is a calcium, strontium or barium or manganese salt of at least one acid selected from the group consisting of sulfuric acid, nitric acid, hydrochloric acid, acetic acid and formic acid.
Claim 8
Dependent Claim
19 words
The azo lake pigment of claim 1 comprising a mixture of ##STR39## in an (A)/(B) ratio of about 9:1.
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) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |