Claims
- 1. A monoazo lake pigment obtained by coupling a diazo component which is an aromatic amine having a sulfonic acid group with a coupler component which contains .beta.-naphthol or .beta.-oxynaphthoic acid and adding a laking agent during or after the coupling reaction, the coupler component further containing 0.1 to 30 mol %, based the coupler component, of a compound of the following formula, ##STR7## wherein n=1 or 2.
- 2. A monoazo lake pigment according to claim 1, wherein the aromatic amine having a sulfonic acid group is at least one member selected from the class consisting of aminobenzenesulfonic acid and aminonaphthalenesulfonic acid.
- 3. A monoazo lake pigment according to claim 2, wherein the aromatic amine having a sulfonic acid group is at least one member selected from the class consisting of 2-amino-5-methylbenzenesulfonic acid, 2-amino-4-chloro-5-methylbenzenesulfonic acid, 2-amino-5-chloro-4-methylbenzenesulfonic acid and 2-amino-1-naphthalenesulfonic acid.
- 4. A monoazo lake pigment according to claim 1, wherein the compound of the formula recited in claim 1 is contained in an amount of 0.3 to 15 mol % based on the coupler component.
- 5. A printing ink composition containing the monoazo lake pigment recited in claim 1 and a vehicle for use in a printing ink.
- 6. A printing ink composition according to claim 5, wherein the vehicle for use in a printing ink is for use in an offset ink and contains 20 to 50 parts by weight of a resin, 0 to 30 parts by weight of a plant oil and 10 to 60 parts by weight of a solvent.
- 7. A printing ink composition according to claim 5, wherein the vehicle for use in a printing ink is for use in a gravure ink and contains 10 to 50 parts by weight of a resin mixture, 30 to 80 parts by weight of a solvent and 1 to 20 parts by weight of an extender.
- 8. A coating composition containing, as a colorant, the monoazo lake pigment recited in claim 1.
- 9. A plastic containing, as a colorant, the monoazo lake pigment recited in claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2-272628 |
Oct 1990 |
JPX |
|
Parent Case Info
This application is a continuation-in-part of now abandoned application Ser. No. 07/773,117 filed Oct. 8, 1991.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
2521908 |
Glass et al. |
Sep 1950 |
|
4115055 |
Dieter et al. |
Sep 1978 |
|
4154577 |
Miederer et al. |
May 1979 |
|
4767844 |
Ando et al. |
Aug 1988 |
|
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
773117 |
Oct 1991 |
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