Bayer Aktiengesellschaft

Gottfried Schneider

Kuno Wagner

Wulf Von Bonin

Ulrich Von Gizycki

Christian Wegner

Hans-Heribert Burgdorfer

Wolfram Mayer

Rolf Dhein

Hanns P Muller

Jan Mazanek

Gunther Boehmke

Dietmar Schapel

Manfred Schreckenberg

Werner Dietrich

Heinz Wolfgang Patzelt

Dietmar Schaepel

Hans-Uwe Lanzke

Hans-Jurgen Botsch

The invention relates to a self-hardening material for supporting bandages which is packaged with exclusion of moisture and consists of an air-permeable, flexible carrier material which is impregnated and/or coated with a compound possessing at least 2 NCO groups. The self-hardening material has a greatly improved shelf life by being stored substantially oxygen-free in an air-tight pack.

Moisture-hardenable bandaging materials

In a dressing material for the production of fixed dressings, comprising a raschel knit fabric carrier coated and/or impregnated with a resin which hardens in the presence of moisture and contains isocyanate groups, the improvement wherein the raschel fabric construction is such that the ratio of the mean distance between two warp threads to the mean distance between two weft threads is less than about 1.5.

Polyurethane fixed dressings which harden in the presence of moisture

Aqueous coal slurries are prepared using aralkyl polyalkylene glycol ethers of the formula ##STR1## in which R.sup.1 represents an optionally substituted aryl radical,

Use of aralkyl polyalkylene glycol ethers for the preparation of aqueous

A gel of specific composition is encased in a flexible elastic casing to form a gel pad. The gel used is made up of (a) 15-62 weight % (based on (a)+(b)) of a high molecular weight covalently cross-linked polyurethane matrix and (b) 85-38 weight % (based on (a)+(b)) of a liquid dispersing agent. The liquid dispersing agent is a polyhydroxy compound having an average molecular weight between 1000 and 12,000, and an OH number between 20 and 112. This dispersing agent contains essentially no hydroxy compounds with a molecular weight below 800. The gel may also include fillers and/or additives known to those in the art. Suitable casing materials include polyurethane films, woven fabrics, knitted fabrics, and mesh fabrics. These gel pads are particularly useful as mattress, mattress inserts, wheelchair cushions, car seats, car seat supports and as pad elements for upholstered furniture.

Gel pads and a process for their preparation

The present invention relates to polycarbonate compounds characterized in that dimeric fatty acid ester soft segments are co-condensed therein. The invention further relates to processes for preparation of these compounds and their use in films and molded articles.

High-molecular, segmented, thermoplastically processable, aromatic

A process is disclosed for preparing mixtures of low molecular weight polyhydroxyl compounds and optionally hydroxyaldehydes and ketones by condensing formaldehyde hydrate with itself in the presence of

Preparation of low molecular weight polyhydroxyl compounds

The instant invention is directed to a process for dissociating cellular and non-cellular polyurethane resins into re-usable starting products for the isocyanate polyaddition process, wherein the polyurethane is reacted with associates of lactams and adduct-formers having at least two Zerewitinoff-active hydrogen atoms at from 150.degree. to 250.degree. C., optionally at elevated pressure, the improvement wherein from 35 to 1000 parts, by weight, based on 100 parts, by weight, of the polyurethane, of an associate mixture of:

Process for dissociating polyurethane resins

The instant invention relates to a new process for splitting up polyurethane waste into activated polyhydroxyl compounds which may be reused for the production of polyurethane plastics. The process broadly comprises reacting the polyurethane waste with lactams or equilibrium associates of lactams and active hydrogen containing compounds at temperatures of from 150.degree. to 250.degree. C. If desired, the process may be conducted under elevated pressure.

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Leverkusen, Germany

Gottfried Schneider