Bayer Aktiengesellschaft

Novozymes A/s

Other

Genencor International, Inc.

Martin Riegels

Rainhard Koch

Henrik Lund

Lars Saaby Pedersen

Klaus Walz

Winfried Joentgen

Torsten Groth

Uwe Vogt

Joachim Grutze

Karl-Heinz Passon

Michael Pirkotsch

Fritz Lesszinsky

Volker Kahle

Klaus Kackstadter

Axel Seitz

Wilfried Hahn

Bernd Konemund

Sylvia Lohmann

Jurgen Rohr

The present invention relates to a process for enzymatic hydrolysis of cyclic oligomers of poly(ethylene terephthalate), which process comprises subjecting the cyclic oligomer to the action of one or more lipolytic and/or biopolyester hydrolytic enzyme(s).

Enzymatic hydrolysis of cyclic oligomers

Improved compositions for dyeing or printing textile materials of natural or synthetic fibers or mixtures of the two comprise polyaspartic acid or a derivative thereof and, if appropriate, wetting agents, emulsifiers, leveling agents, dispersing agents, reducing agents, oxidizing agents, solubilizing agents, defoamers, reist agents, pH regulators, complexing agents or several of these as further components.

Composition for dyeing or printing textile materials

Mixtures of various starch-degrading enzymes (amylases) which comprise at least one high temperature amylase (HTA) and at least one low temperature amylase (LTA) in an activity ratio of HTA to LTA of 10%:90% to 90%:10% develop at least 60% of their maximum activity in the temperature range from 30.degree. to 90.degree. C. Such mixtures can be diluted with water and treated with customary additives. These mixtures are suitable for desizing textiles sized with starch by treatment of the textiles with the mixtures mentioned and subsequent rinsing.

Enzyme mixtures and processes for desizing textiles sized with starch

Improved dyeings or prints on cellulose, regenerated cellulose and/or mixtures of cellulose with natural or synthetic fiber materials using one or more reactive and/or direct dyes are obtained in the presence of a lithium compound.

Lithium-containing assistants for dyeing and printing of cellulosic

The new process for dyeing polyamide fibers with acid dyestuffs, in which small amounts of metal salts are added to the dyebath, gives dyeings having improved lightfastness.

Process for dyeing delustered polyamide fibers with acid dyestuffs and

Dyed raw cellulose can be bleached in a bleaching and after-treatment bath containing, in addition to usual stabilizers, cationic-monomeric and/or polymeric compounds and, if desired, nonionic surfactants. Bleaching is carried out with the aid of aqueous-hydrogen peroxide. The stabilizers that can be used and the cationic compounds are defined in the specification. Nonionic tensides, if their co-use is desired, are those of the class polyglycolethers.

Process for the after-bleaching of dyed raw cellulose using cationic

Growing community of inventors

Leichlingen, Germany

Martin Riegels