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| Photopolymerizable composition containing a photosensitive donor and photoinitiating acceptor |
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| Organic solvent-soluble photosensitive polyamide resin |
| We claim:
TABLE 3
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| Aqueous ink for ink-jet printing |
| OF THE PREFERRED EMBODIMENTS The aqueous ink for ink-jet printing according to the present ... |
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| Aqueous ink composition for ink-jet recording |
| OF THE PREFERRED EMBODIMENTS An aqueous ink composition according to the present invention ... |
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| Diffusion or sublimation transfer imaging system |
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Process for improving the light fastness of polyamide dyeings with copper complexes of schiff bases or ortho-hydroxy benzophenone
| Details |
Inventors: Preuss, Reinhard; Grutze, Joachim; Beck, Ulrich; Pantke, Hellmuth; Vogel, Karl;
Assignee: Bayer Aktiengesellschaft (Leverkusen, DE)
Primary Examiner: Clingman; A. Lionel
Assistant Examiner:
Attorney, Agent or Firm: Sprung, Horn, Kramer & Woods
The light fastness of polyamide dyeings can be improved by treating polyamide fibre materials, before, during or after dyeing, with copper complexes of the reaction products of salicylaldehydes with amines (for example cyclohexylamine), or with copper complexes of o-hydroxybenzophenones. |
|
DETAILED DESCRIPTION We claim: 1.
Process for improving the light fastness of polyamide dyeings, characterised in that polyamide fibre materials are treated, before, during or after dyeings with a metal complex dyestuff or an acid dyestuff with copper complexes of the reaction products of optionally substituted salicylaldehydes with alkylamines, aromatic diamines or hydrazine (I), and/or copper complexes of optionally substituted o-hydroxybenzophenones (II).
2.
Process according to claim 1, characterised in that the copper complexes are added to the dyebath.
3.
Process according to claim 1, characterised in that 0.
05-2%, relative to the fibre weight, of the copper complexes are employed.
4.
Process according to claim 1, characterised in that the copper complexes employed are those of the formula wherein R denotes C.
sub.
1 -C.
sub.
18 -alkyl or cycloalkyl.
5.
Process according to claim 1, characterised in that the copper complexes employed are those of the formulae ##STR16## wherein Ar denotes optionally substituted 1,4-phenylene or 1,2-phenylene.
6.
Process according to claim 1, characterised in that the copper complexes employed are those of the formula ##STR17## wherein R denotes C.
sub.
1 -C.
sub.
18 -alkyl or cycloalkyl and the rings A can optionally carry further substituents.
7.
Process according to claim 1, characterised in that the copper complexes are employed in combination with 2-(2'-hydroxyphenyl)-benzotriazoles.
Description:
The present invention relates to a process for the production of polyamide dyeings having improved light fastness, which is characterised in that the polyamide is treated, before, during or after dyeing, with copper complexes of the reaction products of optionally substituted salicylaldehydes with alkylamines, aromatic diamines or hydrazine (I), and/or copper complexes of optionally substituted o-hydroxybenzophenones (II).
For this purpose, the compounds (I) and (II) are employed in amounts of about 0.
05-2%, preferably 0.
1-0.
2%, relative to the weight of the polyamide
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