Bayer Aktiengesellschaft

Dietmar Schapel

Ulrich Von Gizycki

Wulf Von Bonin

Hanns P Muller

Kuno Wagner

Manfred Dahm

Roland Richter

Miklos Von Bittera

Herbert Voege

Bernhard Jansen

Hubert Dorn

Harold Heller

Werner Frommer

Hans-Georg Rast

Jorg Baumgarten

Imre Pascik

Rudolf Schmidt

Theo Mann

Franz Drinkuth

Artur Lorenz

Wilhelm Stendel

Wolfgang Behrenz

Roland Rupp

Hanns I Sachs

Hans-Heribert Burgdorfer

Hartwig Grammes

Wolfram Mayer

Heinz Sattler

Gottfried Schneider

Peter Nowak

Thomas Augustin

Manfred Federmann

Claus Hentschel

Gert Kossatz

Rudiger Kammerer

Wilhelm Stendal

Manfred Federman

Ulrich Von Gizyoki

Dietmar Strache

Heinz-Dieter Ebert

Improved gel compounds based on reaction products of polyols and polyisocyanates are characterized in that the polyol component consists of a mixture of a) one or more polyols having hydroxyl values below 112 and b) one or more polyols having hydroxyl values of 112 to 600 and in that the isocyanate index of the reaction mixture is in the range from 15 to 70. They may be used as pressure-distributing elements.

Gel compounds, their production and use

New particularly effective fire retardent elements based on foams and expandable graphite are characterized in that they additionally contain one or more components from the group consisting of phosphate-containing polyols, borates and amine salts.

Fire retardant foams comprising expandable graphite, amine salts and

Surface-distributed hydrocarbons, in particular mineral oil and mineral oil processing products, are removed by allowing water and a polyether containing isocyanate end groups to act on the hydrocarbons and by mechanically removing the gel containing hydrocarbons which is formed.

Process for the removal of surface-distributed hydrocarbons, in

The present invention is directed to a process for the manufacture of plasterboard optionally strengthened with reinforcing materials by mixing gypsum capable of rehydration with water and optionally reinforcing materials and subsequently pressing the resulting mixture, characterized in that polyisocyanates are added to the mixture used for producing the plasterboard and/or are applied to the surface of the finished plasterboard. The invention is also directed to the optionally reinforced plasterboard.

Reinforced plasterboard and method of forming

Impregnating agents are provided consisting essentially of

Impregnating agent and its use

Method of impregnating

A stiff, water resistant laminated medical or veterinary dressing is described along with a procedure for forming the final hardened dressing. The dressing is obtained by treating a gypsum bandage with an aqueous dispersion of a synthetic resin and then forming a layer from it which is immediately adjacent to a layer formed from a water hardenable synthetic resin bandage. Either layer may be formed first and further layers may be formed so long as the layers alternate between those formed from wraps of the gypsum bandages and those formed from wraps of the synthetic resin bandage.

Laminated dressing

Waste water and/or outgoing air are purified by contact with a polyurethane hydrogel containing surface active coal, a polymer having cationic groups and cells having enzymatic activity and being capable of growth.

Biologically active composition for purifying waste water and outgoing

The present disclosure is concerned with self-adhesive sheet-like structures made by adhering an adhesive polyurethane gel material to a supporting substrate and the utilization of such structures in the medical field to adhere materials such as plasters, wound dressings and appliances to the human body, and in other fields to connect articles, such as the parts of a fractured or cracked object, to one another by means of an adhesive bond. The gel is formed by immobilizing a high molecular weight polymeric polyol in the matrix of a covalently crosslinked polyurethane which is prepared by reacting polyisocyanates having an isocyanate functionality of at least 2 with higher molecular weight polyhydroxyl compounds having a hydroxyl functionality of at least 3. These reactants are selected in accordance with the following formula which relates the isocyanate number, K, (isocyanate to hydroxyl equivalents ratio times 100) to the average functionalities of the polyisocyanates (F.sub.I) and of the polyhydroxyl compounds (F.sub.P) as follows: ##EQU1## wherein X is less than or equal to 120. These reactants are also selected to give a weight ratio of matrix to immobilized polymeric polyol of between about 15:85 and 62:38.

Self-adhesive sheet-like structures, process for their preparation and

A biologically active composition is prepared comprising a polyurethane hydrogel containing surface active coal, a polymer having cationic groups and cells having enzymatic activity and being capable of growth. The composition is used for purifying waste water and outgoing air.

Immobilization of cells in polyurethane hydrogel

The present invention relates to a constructional material which is stable in storage and which is kept under moisture-free conditions and which comprises a substrate and a reactive one-component system which hardens on exposure to air by reaction with moisture. The present invention also relates to a process for the production of a constructional material which is stable in storage.

Constructional material

The invention relates to ectoparasiticide-containing polyurethanes which contain spreading agents and ectoparasiticides or mixtures of ectoparasiticides and to said ectoparasiticide-containing polyurethanes in the form of sheets, films, shaped articles, coatings or impregnations. Also included in the invention is the use of said polyurethane compositions for combating ectoparasiticides.

Ectoparasiticide-containing polyurethanes

The invention relates to ectoparasiticide-containing polyurethane collars for animals containing spreading agents and ectoparasiticides as well as methods for their manufacture.

Ectoparasiticide-containing collars for pets

A process for supplying plants with nutrients uniformly and over a long period of time by the addition of nutrient-charged synthetic resin ion exchangers and mineral fertilizers to the culture medium, according to which the nutrient-charged synthetic resin ion exchangers are employed together with those mineral fertilizers with particle size &lt;500 .mu.m which have been coated with massive polyurethanes having a particular water absorbing capacity which is adapted in a particular manner to the water solubility of the mineral fertilizer; furthermore, fertilizers containing nutrient-charged synthetic resin ion exchangers, and the mineral fertilizers coated with the massive polyurethanes having a particular water absorbing capacity.

Ion exchanger fertilizers and a process for supplying plants with

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

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Cologne, Germany

Dietmar Schapel