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US 4,051,119 AGranted
Azomethine dyes derived from an o-hydroxy aromatic aldehyde and a 2-aminopyridine
AssigneeAmerican Color & Chemical Corporation
InventorRaouf Botros
Life of this patent
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Abstract
Azomethine dyes of the formula ##STR1## in which A is phenyl, naphthyl, phenyl substituted by up to 3 substituents or naphthyl substituted by up to 2 substituents; B is salicylaldehyde, o-hydroxy-naphthaldehyde or salicylaldehyde or o-hydroxy-naphthaldehyde substituted by up to 2 substituents and C is 2-aminopyridyl or 2-aminopyridyl substituted by up to 2 substituents. The dyes produce dyeings on metal-modified polypropylene of excellent fastness properties.
Claims7
An azomethine dye of the formula:
- ##STR35## wherein:
- A is phenyl, naphthyl, phenyl substituted by up to 3 substituents or naphthyl substituted by up to 2 substituents, said substituents being independently selected from lower alkyl of 1-4 carbons;
- lower alkoxyl of 1-4 carbons;
- nitro;
- cyano;
- fluorine;
- chlorine;
- bromine;
- trifluoromethyl;
- hydroxyl;
- RCOO--, where R is alkyl of 1-4 carbons;
- carboxyl;
- ROOC--, where R is alkyl of 1-4 carbons;
- RCO--, where R is alkyl of 1-4 carbons;
- benzoyl;
- RCONH--, where R is alkyl of 1-4 carbons;
- ArCONH--, where Ar is phenyl;
- or carbamyl, the nitrogen of which is unsubstituted or singly or doubly substituted by alkyl of 1-4 carbons;
- B is salicylaldehyde, o-hydroxy-naphthaldehyde, or salicylaldehyde or o-hydroxy-naphthaldehyde substituted by up to 2 substituents independently selected from lower alkyl of 1-4 carbons;
- lower alkoxyl of 1-4 carbons;
- cyano;
- fluorine;
- chlorine or bromine;
- and
- C is 2-aminopyridyl or 2-aminopyridyl substituted by up to 2 substituents independently selected from lower alkyl of 1-4 carbons;
- lower alkoxyl of 1-4 carbons;
- nitro;
- chlorine or bromine.
25 more elements
An azomethine dye of the formula:
- ##STR39## wherein:
- A is phenyl or phenyl substituted by up to 3 substituents independently selected from lower alkyl of 1-4 carbons;
- lower alkoxyl of 1-4 carbons;
- trifluoromethyl;
- fluorine;
- bromine or chlorine;
- B is salicylaldehyde or salicylaldehyde substituted by up to 2 substituents independently selected from lower alkyl of 1-4 carbons;
- lower alkoxyl of 1-4 carbons;
- fluorine;
- chlorine or bromine;
- and
- C is 2-aminopyridyl or 2-aminopyridyl substituted by up to 2 substituents independently selected from lower alkyl of 1-4 carbons;
- lower alkoxyl of 1-4 carbons;
- fluorine;
- chlorine or bromine.
12 more elements
An azomethine dye of the formula:
- ##STR40##
Dependencies are inferred from the claim text.