Yellow methine dyes and their use for dyeing plastics
AssigneeLANXESS Deutschland GmbH
InventorsHans-Ulrich Borst, Frank Linke, Sabine Schmauser
Life of this patent
Estimating the term…
Abstract
The present invention relates to substituted 4-amino-6-methylbenzaldehyde derivatives of formula (I) in which R1 and R2 are identical or different and are each an optionally substituted alkyl, and R3 to R7 are identical or different and are each hydrogen, halogen, cyano, optionally substituted alkyl or optionally substituted alkoxy, as novel yellow methine dyes, to methods for the production thereof and to the use thereof for the colouring of plastics.
Claims16
A substituted 4-amino-6-methylbenzaldehyde derivative of formula (I)
- wherein
- R1 is methyl or ethyl,
- R2 is methyl or ethyl, or is methyl or ethyl which in each case is monosubstituted by a radical of formula
- in which
- R8 is methyl, ethyl, n-propyl, isopropyl, cyclohexyl or phenyl, and
- R9 is hydrogen or methoxy,
- R3 is hydrogen, fluorine or chlorine,
- R4 is hydrogen, fluorine, chlorine or trifluoromethyl,
- R5 is hydrogen, fluorine, chlorine or methoxy,
- R6 is hydrogen, and
- R7 is hydrogen or chlorine.
-10. (canceled)
A method for bulk colouring of plastics, comprising the steps of
- grinding or mixing at least one substituted 4-amino-6-methylbenzaldehyde derivative of formula (I)
- in dry form with at least one plastic, to form a plastic-colourant mixture,
- wherein
- R1 is methyl or ethyl,
- R2 is methyl or ethyl, or is methyl or ethyl which is each case in monosubstituted by a radical of formula
- in which
- R8 is methyl, ethyl, n-propyl, isopropyl, cyclohexyl or phenyl, and
- R9 is hydrogen or methoxy,
- R3 is hydrogen, fluorine or chlorine,
- R4 is hydrogen, fluorine, chlorine, or trifluoromethyl,
- R5 is hydrogen, fluorine, chlorine, or methoxy,
- R6 is hydrogen, and
- R7 is hydrogen or chlorine;
- and
- melting and homogenizing the plastic-colourant mixture.
A method for bulk colouring of plastics, comprising the steps of
- adding at least one substituted 4-amino-6-methylbenzaldehyde derivative of formula (I)
- to a molten plastics compound comprising at least one plastic,
- wherein
- R1 is methyl or ethyl,
- R2 is methyl or ethyl, or is methyl or ethyl which is each case in monosubstituted by a radical of formula
- in which
- R8 is methyl, ethyl, n-propyl, isopropyl, cyclohexyl or phenyl, and
- R9 is hydrogen or methoxy,
- R3 is hydrogen, fluorine or chlorine,
- R4 is hydrogen, fluorine, chlorine, or trifluoromethyl,
- R5 is hydrogen, fluorine, chlorine, or methoxy,
- R6 is hydrogen, and
- R7 is hydrogen or chlorine;
- and
- subsequently homogenizing.
A method for bulk colouring of plastics, comprising the steps of
- mixing at least one substituted 4-amino-6-methylbenzaldehyde derivative of formula (I)
- with monomeric reactants for producing at least one plastic,
- wherein
- R1 is methyl or ethyl,
- R2 is methyl or ethyl, or is methyl or ethyl which is each case in monosubstituted by a radical of formula
- in which
- R8 is methyl, ethyl, n-propyl, isopropyl, cyclohexyl or phenyl, and
- R9 is hydrogen or methoxy,
- R3 is hydrogen, fluorine or chlorine,
- R4 is hydrogen, fluorine, chlorine, or trifluoromethyl,
- R5 is hydrogen, fluorine, chlorine, or methoxy,
- R6 is hydrogen, and
- R7 is hydrogen or chlorine;
- and
- polymerizing the mixture.
-15. (canceled)
Dependencies are inferred from the claim text.