Claims
- 1. A 1,4-diketopyrrolo[3,4-c]pyrrole of formula ##STR38## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently of one another hydrogen, Cl, Br, CH.sub.3, OCH.sub.3 CN or phenyl, and at least one of the substituents R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is a group
- --O(CH.sub.2).sub.n X or --O(CH.sub.2 CH.sub.2 O).sub.p CH.sub.2 CH.sub.2 X
- wherein
- n is an integer from 2 to 12, and
- p is an integer from 1 to 3,
- X is a heterocyclic radical selected from the group consisting of imidazolyl, pyrazolyl, triazolyl, benzimidazolyl and benzotriazolyl, which radical is unsubstituted or substituted by one or two methyl groups.
- 2. A 1,4-diketopyrrolo[3,4-c]pyrrole of formula I according to claim 1, wherein at least one of R.sub.1, R.sub.2, R.sub.3 or R.sub.4 is a group
- --O(CH.sub.2).sub.n X or --O(CH.sub.2 CH.sub.2 O).sub.p CH.sub.2 CH.sub.2 X
- wherein
- n and p are as defined in claim 1, and X is a heterocyclic radical selected from the group consisting of imidazolyl, pyrazolyl and triazolyl.
- 3. A 1,4-diketopyrrolo[3,4-c]pyrrole of formula I according to claim 1, wherein one or two of R.sub.1, R.sub.2, R.sub.3 or R.sub.4 are a group
- --O(CH.sub.2).sub.n X or --O(CH.sub.2 CH.sub.2 O).sub.p CH.sub.2 CH.sub.2 X
- wherein
- n is an integer from 2 to 6 and
- p is an integer from 1 or 2, and
- X is a heterocyclic radical selected from the group consisting of imidazolyl, pyrazolyl and triazolyl.
- 4. A 1,4-diketopyrrolo[3,4-c]pyrrole according to claim 3, wherein X is a heterocyclic radical selected from the group consisting of imidazoyly, pyrazolyl and triazolyl.
- 5. A pigment composition comprising
- a) 80-99.9% by weight of at least one 1,4-diketopyrrolo[3,4-c]pyrrole of formula I, wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently of one another hydrogen, Cl, Br, CH.sub.3, OCH.sub.3, CN or phenyl, and
- b) 0.1-20% by weight of at least one 1,4-diketopyrrolo[3,4-c]pyrrole of formula I according to claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1250/91 |
Apr 1991 |
CHX |
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Parent Case Info
This is a divisional of application Ser. No. 07/870,986, filed Apr. 20, 1992, now U.S. Pat. No. 5,200,528, granted on Apr. 6. 1993.
US Referenced Citations (4)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0133156 |
Feb 1985 |
EPX |
0321919 |
Jun 1989 |
EPX |
3832064 |
Mar 1990 |
DEX |
Non-Patent Literature Citations (2)
Entry |
Chem. Abstr. 111: 196751y (1988). |
Chem. Abstr. 113: 61388f (1990). |
Divisions (1)
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Number |
Date |
Country |
Parent |
870986 |
Apr 1992 |
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