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US 5,621,027 AGranted
Dyestuffs for bulk dyeing plastics
AssigneeBayer Aktiengesellschaft
InventorsPeter Roschger, Volker Hederich, Stephan Michaelis, Friedrich W. Krock
Life of this patent
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Abstract
Dyestuffs of the formula ##STR1## wherein Z denotes a radical to complete a 3,4- or 2,3-pyridinylene, a 4,5-pyrimidinylene, a 3,4- or 4,5-pyridazinylene or a 2,3-pyrazinylene system and X, Y, m and n have the meanings given in the description, which are particularly suitable for bulk dyeing plastics, in particular thermoplastics, have been found.
Claims10
Dyestuffs of the formula ##STR14## wherein Z denotes a radical to complete a 3,4- or 2,3-pyridinylene, a 4,5-pyrimidinylene, a 3,4- or 4,5-pyridazinylene or a 2,3-pyrazinylene system,
- X is alkyl, halogen, nitro, chlorosulphonyl, aryloxysulphonyl, hydroxyl, alkoxy, acyloxy, an aminosulphonyl which is unsubstituted or substituted by alkyl or aryl, or a fused-on cycloaliphatic ring,
- Y is alkyl, aryl, halogen, nitro, hydroxyl, alkoxy, acyloxy, aryloxysulphonyl, chlorosulphonyl, an amino group which is unsubstituted or substituted by acyl or alkyl, an aminosulphonyl radical which is unsubstituted or substituted by alkyl or aryl, or a fused-on cycloaliphatic or aromatic ring,
- m is a number between 0 and 6,
- n is a number between 0 and 3
- and for m >1
- X can in each case have different or identical meanings as mentioned above,
- and for n>1
- Y can in each case have different or identical meanings as mentioned above.
5 more elements
Dependencies are inferred from the claim text.