Bayer Aktiengesellschaft

Harro Traubel

Helmut Reiff

Hans-Werner Muller

Jurgen Reiners

Joachim Probst

Joachim Konig

Karl-Arnold Weber

Fritz Novotny

Klaus Konig

Hans-Josef Laas

Dieter Dieterich

Karl H Pisaric

Reinhard Halpaap

Winfried Joentgen

Torsten Groth

Bruno Bomer

Helmut Woynar

Fritz Puchner

Dieter Brauner

Helga Heinze

Bruno Zorn

Manfred H Pahl

Hans-Josef Buysch

Christian Wamprecht

Hans Rudolph

Ulrich E Muller

Hans J Rosenkranz

Hanns-Peter Muller

Manfred Dietrich

Wilhelm Thoma

Bernhard Jansen

Nikolaus Muller

Karl Fuhr

Walter Schroer

Rainhard Koch

Wolfgang Zarges

Ludger Heiliger

Hans Muller

Winfried Mennicke

Karl-Ludwig Noble

Hans-Albert Ehlert

Rolf Langel

Gerd Schmitz

Jurgen Weisser

Eckhard Wenderoth

Joachim Kochta

Edzard Tholema

Horst Zapfel

Jurgen Kopp

Karl-Ernst Schuster

Wilhelm Krummel

Bruno Bomer, Deceased

Manfred Schnee

Joseph Pedain

Heinrich Strenger

Karl A Weber

Harald Faika

Axel Hummel

Gunther Held

Guido M Bomer, Heir

Martin Reiner

Hans J Focks

The novel AOX-free process for imparting wet strength to paper with water-dispersible polyisocyanates is distinguished by a good wet-strength effect, even under mild drying conditions, and does not affect the activity of optical brighteners used at the same time.

Process for imparting wet strength to paper

Paper finishing aid

The present invention relates to a process for preparing an isocyanate group-containing allophanate corresponding to formula (I) ##STR1## wherein R represents the residue obtained by removing the isocyanate groups from a (cyclo)aliphatic or araliphatic diisocyanate,

Process for the manufacture of allophanates having isocyanate groups

The use of dispersions of urea group-containing polyurethanes based on selected starting materials and crosslinkers leads to the production of fully biodegradable shaped bodies.

Biodegradable and compostable shaped bodies

A process for preparing low-salt preparations of condensation products based on

Process for preparing low-salt preparations of condensation products

Use of polyaspartic acid amides as leather auxiliary products

Process for producing structurally resistant paper

Bisulphite-blocked, polyether-modified polyisocyanates are outstandingly suitable, in combination with mineral tanning agents, for the tanning of leather.

Process for tanning leather

Oligourethanes containing both anionic and cationic groups may be used as formulating agents for superior aqueous pigment preparations.

Use of oligourethanes as formulating agents for aqueous pigment

The invention relates to a new process for the preparation of cellulose-containing material provided with a dry-strength and wet-strength finish and/or sized, characterised in that the cellulose-containing material is treated with a water-dispersible polyisocyanate mixture (I), which contains tertiary amino and/or ammonium groups, optionally polyether units and optionally hydrophobic groups.

Chlorine-free multifunctional resins for paper finishing

The present invention relates to tanning agents containing carbamoyl sulfonate groups that are prepared by the reaction of (A) organic polyisocyanates, (B) 0.01 to 0.4 equivalents, relative to the isocyanate groups of polyisocyanate (A), of polyether alcohols having incorporated polyalkylene oxide units (the equivalents of the polyether alcohol being based on the hydroxyl groups), wherein 40 to 100 mole-% of the polyalkylene oxide units consist of polyethylene oxide units having a sequence length of 5 to 70, (C) optionally, NCO-reactive components other than polyether polyol (B), and (D) ammonium or alkali bisulfites or disulfites.

Bisulfite-blocked polyisocyanates as tanning agents

Polyaspartic acid and its salts and anhydrides are outstandingly suitable as tanning agents, as retanning agents and as standardizing agents for dyestuffs.

Leather tanning agent and standardizing agents for dyestuffs

The present invention relates to the preparation of coated textile fabrics using an aqueous binder dispersion containing

Process for coating textiles

The invention relates to a new process for the preparation of cellulose-containing material provided with a dry-strength and wet-strength finish and/or sized, characterized in that the cellulose-containing material is treated with a water-dispersible polyisocyanate mixture (I), which contains tertiary amino and/or ammonium groups, optionally polyether units and optionally hydrophobic groups.

Specific cationic polymers having hydrophobic side chains are highly suitable as binders for pigments for the dyeing of leather.

Process for dying leather with pigments and cationic binders

Growing community of inventors

Leverkusen, Germany

Harro Traubel