Basf Aktiengesellschaft

Basfaktiengesellschaft

Dystar Colours Distribution Gmbh

Wolfgang Schrott

Peter Neumann

Bernhard Albert

Klaus D Schomann

Sibylle Brosius

Harald Kuppelmaier

Michael Schmitt

Helmut Barzynski

Michael Acker

Gerhard Wagenblast

Peter Hauser

Karl-Heinz Etzbach

Karin H Beck

Reinhold Krallmann

Karl-Heinz Feuerherd

Matthias Dust

Erich Kromm

Michael Thomas

Heidi Benthack-Thoms

Harald Schlueter

Klaus-Dieter Schomann

Regina Laws

Harald Kuppelhamier

Kurt Bacher

Joerg Schulze

Franz Sütsch

Wolfram Badura

Process for manufacturing cellulose fibres

Carbonyloxy-substituted azulenesquaric acid dyes of the formula ##STR1## where L is C.sub.1 -C.sub.12 -alkylene which may be substituted by phenyl,

Carbonyloxy-substituted azulenesquaric acid dyes, intermediates therefor

Continuous production of surface dyeings on cellulose fiber textile

Dye mixtures comprising the dye of the formula I ##STR1## where R.sup.1 is in each instance the radical of the formula ##STR2## and a dye of the formula ##STR3## where one of the two radicals R.sup.2 and R.sup.3 is methoxy and the other is hydroxysulfonyl, and

Mixtures of reactive dyes

An optical recording medium contains novel azulenemethine dyes of the formula ##STR1## where R is unsubstituted or substituted C.sub.1 -C.sub.6 -alkyl, X.sup..crclbar. is an anion, A.sup..sym. is heterocyclic radical, of the formula ##STR2## wherein R.sup.1, R.sup.2, R.sup.3, Y, Z and W are as defined, with the proviso that, when A.sup..sym. is a radical of the formula II f, II g, II i or II k, m is 2, A is 1, 2 or 3 and M is 1 or 2.

Azulenemethine dyes and an optical recording medium containing the novel

Azulenesquaric acid dyes of the formula ##STR1## where L is substituted or unsubstituted C.sub.1 -C.sub.12 - alkylene,

A zulenes containing a urethane group

Azulenesquaric acid dyes of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each have specified meanings are prepared from azulene derivatives of the formula ##STR2## where R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each have specified meanings as intermediates, and used in an optical recording medium.

Azulenesquaric acid dyes, azulene intermediates therefor, and optical

A liquid-crystalline mixture contains a liquid crystal composition and an azulenesquaric acid dye of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each have defined meanings, and is used for fabricating liquid crystal displays.

Liquid-crystalline mixture containing an azulenesquaric acid dye

Azulenesquaric acid dyes of the formula ##STR1## where L is substituted or unsubstituted C.sub.1 -C.sub.12 -alkylene,

Azulenesquaric acid dyes that contain urethane groups

An optical recording medium comprises a support material and a light-absorbing layer consisting essentially of a soluble mixture of a thermoplastic binder and at least one dye, wherein the thermoplastic binder is a phenol-aldehyde resin having an average molecular weight of greater than 300 which is soluble in an alcohol having a boiling point of less than 200.degree. C.

Optical recording medium

An optical recording medium contains a transparent base, a dye-containing layer which is sensitive to laser light and a reflector layer which contains a silicon-phthalocyanine derivative of the formula ##STR1## where R.sup.1 is hydrogen, alkyl, alkoxy, halogen or trialkylsilyl, n is 1, 2, 3 or 4 and A and B are identical or different and independently of one another are each alkyl, halogen or unsubstituted or substituted alkoxy or trialkylsilyloxy.

Optical recording medium which has a reflector layer containing a

An optical recording medium composed of a base material and a laser light sensitive layer which contains an azulenium dye as storage material with or without a binder is obtainable by spin-coating a solution containing an azulenium dye of the formula ##STR1## where R is C.sub.1 -C.sub.6 -alkyl which may be substituted or unsubstituted, and n is 1, 2 or 3, with or without a binder and one or more solvents which have evaporation numbers of not less than 4 and in which an azulenium dye of the abovementioned formula has a solubility of not less than 5 g/l onto a transparent base material based on a plastics material or glass.

Optical recording medium containing an azulenium dye

An optical recording medium containing a storage layer and, if required, one or two substrate layers, the storage layer containing graphite as the storage material, a process for the production of the novel optical recording medium, and its use as a Read Only Memory information carrier.

Optical recording medium, its preparation and its use as a read only

Tetraphenyldithiolene complexes of the formula ##STR1## and novel asymmetrically substituted benzoins of the formula ##STR2## where X.sup.1, X.sup.2 and X have the meanings stated in the description and Me is nickel, palladium or platinum. The complexes have very high absorption in the range from 800 to 950 nm and are readily soluble in the plastics used for the production of optical recording materials.

Novel tetraphenyldithiolene complexes, asymmetrically substituted

The novel recording materials contain triquinocyclopropanes of the formula (I) ##STR1## where R.sup.1, R.sup.2 and R.sup.3 independently of one another are each C.sub.1 -C.sub.12 -alkyl, in a polymer layer, and can be written on and read by means of a semiconductor laser. The information written has a high signal-to-noise ratio.

Growing community of inventors

Ludwigshafen, Germany

Wolfgang Schrott