Bayer Aktiengesellschaft

Hermann Beecken

Hans-Peter Kuhlthau

Walter Gomm

Novel dyestuffs of the general formula ##STR1## wherein R designates a lower alkyl or alkenyl radical and

p-(Pyridinium-vinyl)-N,N-(disubstituted-aniline salts for dyeing paper

Cationic styryl dyestuffs of the formula ##STR1## in which A.sup.1 is an alkyleneoxy or alkyleneamino radical,

Phenylalkylamino-styryl dyestuffs

Cationic styryl dyestuffs of the general formula ##STR1## wherein Q.sup.+ designates a cationic grouping,

Cationic styryl dyestuffs

Styryl dyestuffs of the general formula ##STR1## wherein Het represents a pyridinium radical having the structure ##STR2## R and R.sup.1 independently of one another designate lower alkyl or alkenyl groups, which can be substituted by non-ionic radicals,

Dimethine dyestuffs, their preparation and their use for dyeing

Styryl dyestuffs of the formula ##STR1## wherein Q.sym. represents a grouping containing a quaternary nitrogen atom and A represents a bridge member,

Quaternized amino-substituted styryl dyestuffs

The invention relates to water-insoluble styryl dyestuffs of the formula ##STR1## wherein B is a bridge member, R is hydrogen, alkyl, aryl or the remaining members of a partially saturated ring fused to the ring 'a', Z is preferably CN and n denotes the numbers 3 to 5. The dyestuffs are outstandingly suitable for the dyeing of hydrophobic fibre materials in yellow shades. The dyeings are distinguished by excellent fastness to light.

Water insoluble styryl dyestuffs having hetero-aryl methylene substituent

The invention is directed to dyestuffs of the formula ##STR1## wherein THE PHENYL NUCLEI A, B, D and E can each be substituted

Styryl dyestuffs

Process for the preparation of styryl dyestuffs, characterized in that, in a one-pot reaction, amines of the general formula form ##STR1## wherein R.sub.1 denotes alkyl or aryl,

Process for the preparation of styryl dyestuffs

The invention relates to water-insoluble styryl dyestuffs of the formula ##STR1## in which A is aryl

Cationic dyestuffs of the formula ##STR1## wherein R represents alkyl, alkenyl, cycloalkyl or aralkyl,

Cationic dyestuffs

Cationic azodyestuffs of the formula ##STR1## in which the substituents have the meaning stated below, are suitable for dyeing and printing of natural and synthetic materials especially polyacrylonitrile and acid modified polyesters and polyamides. They are also suitable for dyeing and printing of cellulose acetate, coir, jute, sisal, silk tannin-treated cotton, paper, ball-pen pastes, rubber stamps inks, and for use in flexographic printing.

Triazole-azo-phenyl cationic dyestuffs

The invention relates to water-insoluble styryl dyestuffs of the formula ##STR1## in which X is an O- or S-atom,

The invention relates to water-insoluble styryl dyestuffs of the formula ##STR1## wherein B is a bridge member, R is hydrogen, alkyl, aryl or the remaining members of a partially saturated ring fused to the ring a, Z is preferably CN and n denotes the numbers 3 to 5. The dyestuffs are outstandingly suitable for the dyeing of hydrophobic fiber materials in yellow shades. The dyeings are distinguished by excellent fastness to light.

The invention relates to dyestuffs of the formula ##STR1## are employed, WHEREIN

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Schildgen, Germany

Hermann Beecken