Back to results
US 5,028,701 AGranted
Monazo compounds containing a 1-phenyl-2-pyrazoline coupling component
AssigneeBayer Aktiengesellschaft
InventorsRainer Hamprecht, Manfred Hoppe
Life of this patent
Estimating the term…
Abstract
Disperse dyestuffs of the formula ##STR1## in which A/B denotes H, alkyl, C1 or O-alkyl, R.sub.1, R.sub.2, R.sub.3 denote H or alkyl, R.sub.4 denotes alkyl, aryl or COO-alkyl, R.sub.5 denotes alkyl or aryl, Y denotes H or CN, X denotes NO.sub.2, Cl, Br, CN or SO.sub.2 -alkyl, V denotes NO.sub.2, Cl, Br, COOR.sub.5, COR.sub.5 CF.sub.3 or alkyl and Z denotes H, Cl, Br, SCN or CN, are very color-strong and are suitable in particular for the dyeing of polyester by a wide range of methods.
Claims6
An azo dyestuff of the formula ##STR65## in which, independently of one another, A denotes H,
- B denotes H, or CH.sub.3,
- R.sub.1, R.sub.2, denote C.sub.1 -C.sub.2 -alkyl,
- R.sub.3 denotes H or C.sub.1 -C.sub.2 -alkyl,
- R.sub.4 denotes C.sub.1 -C.sub.2 -alkyl,
- Y denotes CN,
- X denotes NO.sub.2 or CN,
- V denotes NO.sub.2, and
- Z denotes H.
5 more elements
Dependencies are inferred from the claim text.