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US 4,229,172 AGranted
Disperse dyeing of polyester with benzalketo derivatives as carriers: benzalacetone, methyl cinnamate etc.
AssigneeSandoz Ltd.
InventorsHans-Peter Baumann, Hans-Georg Karmann, Achim Wiedemann
Life of this patent
Estimating the term…
Abstract
Polyester or polyester blend textile material is dyed with a disperse dyestuff in the presence of a benzalketo derivative as a dyeing carrier.
Claims27
A method of dyeing a polyester or polyester blend textile material with a disperse dyestuff which comprises exhaust dyeing in a dyebath to which has been added before the introduction of the textile material a dyeing carrier of formula ##STR3## wherein R is (C.sub.1-4)alkyl or (C.sub.1-4)alkoxy,
- each of
- R.sub.1 and R.sub.2, independently, is hydrogen, halogen, methyl or ethyl,
- and each of
- R.sub.3 and R.sub.4, independently, is hydrogen, halogen, hydroxyl, (C.sub.1-2)alkyl or (C.sub.1-2)alkoxy,
- or a mixture of such dyeing carriers.
2 more elements
Dependencies are inferred from the claim text.