Basf Aktiengesellschaft

Basf Corporation

Michael W Mueller

Ekkehard Schwab

Helmut Auweter

Rainer Feser

Reinhold J Leyrer

Gerhard Wegner

Norbert Mueller

Manfred Ohlinger

Klaus Boehlke

Dieter Butterfass

Hans-Joachim Schuhmacher

Maximilian Angel

Volker Schwendemann

Werner Steck

Roger G Klimesch

Robert Rupaner

Franz G Mietzner

Werner Huebner

Albin Berger

Hermann Dikow

Wolfgang Kochanek

Volker Arndt

Rudi Lehnert

Bernhard Boettcher

Kalus-Dieter Hoppe

A process for producing fibers containing polypropylene as the main component by the method of melt spinning comprises melting a new binder-consolidated nonwoven and spinning the melt into new fibers.

Production of fibers containing mainly polypropylene

A process for producing fibers containing polypropylene as the main component by the method of melt spinning which includes melting a new binder-consolidated nonwoven and spinning the melt into new fibers.

A coating agent comprises an emulsion polymer obtained by free radical emulsion polymerization of a monomer mixture of

Coating agents

Ethylene-vinyl acetate copolymers of increased solidification point

A chromium dioxide material consisting of acicular, ferromagnetic chromium dioxide particles having a nonmagnetic, hydrogen-containing protective surface layer, which material has improved stability to chemical decomposition, a process for its preparation and magnetic recording media containing this chromium dioxide and having good long-term stability of the residual magnetization under conditions of high humidity and temperature are described.

Chromium dioxide material, its preparation and magnetic recording media

Stabilized acicular ferromagnetic chromium dioxide is prepared by reductive treatment of the chromium dioxide with Na.sub.2 [Fe(CO).sub.4 ], and this material is present in magnetic recording media.

Preparation of stabilized chromium dioxide with sodium

Finely divided hexagonal ferrite powder is prepared by autoclave treatment of an aqueous alkaline suspension containing the ferrite-forming metal ions at from 250.degree. to 330.degree. C. and subsequent heating of the resulting material at not more than 900.degree. C., by a process in which the ferrite-forming metal ions are used in the form of salts melted in their water of crystallization.

Preparation of finely divided hexagonal ferrite powder

An acicular, ferromagnetic material which has a high coercive force and essentially consists of iron-containing chromium dioxide is prepared by thermal decomposition of hydrated chromium(III) chromate under superatmospheric pressure.

Process for preparing acicular ferromagnetic material consisting

Acicular, ferromagnetic metal particles which essentially consist of iron and have a nickel content of not more than 0.4% by weight and high values for coercive force and magnetization, and a process for the preparation of these particles. The particles further include zinc, phosphorus in the form of phosphate ions, and silicon in the form of SiO.sub.2.

Acicular, ferromagnetic metal particles essentially consisting of iron,

In the production of resist images by application of a radiation-sensitive positive-working resist layer based on degradable polymers onto a substrate, imagewise exposure of the resist layer to actinic radiation and removal of the irradiated parts of the layer with development of the resist image, the radiation-sensitive resist layer used is composed of poly(diacetylenes), in particular soluble ones. Preferably, the radiation-sensitive resist layer based on the poly(diacetylenes) contains sensitizers which can be activated by actinic radiation and which, after being activated, induce or accelerate molecular degradation of the poly(diacetylenes). Dry film resists comprise a temporary dimensionally stable base and a radiation-sensitive resist layer which is applied on the base, can be degraded by exposure to actinic radiation and is based on poly(diacetylenes), in particular soluble ones, with or without a cover sheet on top of the said resist layer.

Production of resist images, and a suitable dry film resist

Molecular degradation of poly(diacetylenes), in particular with production of poly(diacetylenes) having selected molecular weights, is carried out by a process in which the poly(diacetylenes), for example in solution or as solid or liquid layers, are present as a homogeneous mixture with sensitizers or sensitizer systems which can be activated chemically, those which can be activated by heat and/or those which can be activated by actinic light, and degradation of the poly(diacetylenes) is induced, in particular via free radical reactions, by appropriate activation of these sensitizers or sensitizer systems.

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Plankstadt, Germany

Michael W Mueller