Bayer Aktiengesellschaft

Mobay Chemical Corporation

Karl-Heinz Wolf

Michael Kausch

Friedemann Muller

Hans-Georg Hoppe

Joachim Wolff

Hans-Georg Wussow

Wolfgang Brauer

Jurgen Winkler

Konrad Schmitz

Wolfgang Klein

Carlhans Suling

Reinhold M Klipper

Bernhard Schulte

Herbert Heidingsfeld

Konrad Nonn

Thomas J Thomas

Willi Meister

Hans Schroer

Rudi Dauscher

Dietmar Kalz

Robert G Hoguet

Heinz Gall

Henry T Whetsell

The invention relates to a spinning process, more particularly a dry spinning process, for the production of elastane fibers in which 0.8 to 2% by weight of polydimethylsiloxane with a viscosity of 50 to 300 cSt and 0.2 to 0.6% by weight of ethoxylated polydimethylsiloxane with a viscosity of 20 to 150 cSt are added to the elastane spinning solution before it is spun.

Yarn formed of eastane fibers produced by the dry spinning or wet spinning of spinning solutions which include polydimethylsiloxane and ethoxylated polydimethylsiloxane

Process for the production of elastane fibers by inclusion of a

A thermoplastic molding composition comprising a thermoplastic polyurethane and a wax mixture is disclosed. The polyurethane is a product of an organic diisocyanate, a linear, hydroxyl-terminated polyol and a diol or diamine chain extender. The wax mixture contains a first mixture of an ester of a C.sub.10-45 aliphatic carboxylic acid and a diol, and an alkali metal or alkaline earth metal salt of a C.sub.10-45 aliphatic carboxylic acids, and at least one member selected from the group consisting of fatty acid ester, fatty acid amide, fatty acid ester amide and polyethylene wax.

Melt-processable polyurethanes containing special wax mixtures

A thermoplastsic molding composition comprising thermoplastic polyurethane resin and about 0.05 to 2 percent of a wax is disclosed. The composition which offers processing advantages, including release and cosmetic properties, is characterized in that the wax contains acylation products of hydroxy groups and of amino groups of amino alcohols.

Melt processable polyurethanes containing wax

Azo dyes are obtained by diazotizing an aromatic amine and combining the resulting diazonium salt solution with a sulpho-containing coupling component when the sole acid donor used for the diazotization reaction--instead of the otherwise customary mineral or fatty acids--is a low molecular weight, nonsurfactantlike aromatic sulphonic acid.

Process for the preparation of stable aqueous solutions of anionic

In the production of elasthane threads by solution spinning of polyurea polyurethanes by conventional spinning processes, excellent stabilization against light and noxious gases are obtained if at least one component of the system to be spun contains tertiary amino groups and the substances used as antioxidizing agents are phenols of the kind which do not form colored nitro compounds.

Elasthane threads, their production and intermediate products required

The present disclosure is concerned with storage stable concentrated fluid aqueous dispersions of water soluble cold dyeing fiber reactive dyes. These dispersions contain anionic or polyvinyl dispersants to provide resistance against settling or agglomeration and water soluble electrolytes to provide resistance against hydrolysis of the fiber reactive groups. The dispersions have an average particle size of less than 100 microns and in a preferred embodiment sufficient buffering agent to stabilize the pH at between about 5 and 8.

Concentrated flowable storage stable aqueous formulations of cold dyeing

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Koln, Germany

Karl-Heinz Wolf