Bayer Aktiengesellschaft

Karl Otto Braun Kg

Roland Richter

Hanns P Muller

Bernhard Jansen

Kuno Wagner

Dietmar Schapel

Wolfram Mayer

Wilhelm Brandes

Paul Reinecke

Rudolf Hombach

Bernd Riberi

Rudolf Schmidt

Josef Pedain

Wolfgang Podszun

Reinhard Halpaap

Joachim Probst

Hanns-Peter Muller

Gerhard Bonse

Michael Sonntag

Michael Muller

Christian Wegner

Werner Kubitza

Gerhard Klein

Theodor Engbert

Manfred Dollhausen

Edgar P Mohring

Wilhelm Weber

Hans-Joachim Kreuder

Gerhard Mennicken

Hans Hettel

Geza Avar

Hans-Albrecht Freitag

Ralf Busch

Gunter Langen

Jurgen Zander

Rudolf Helm

Jurg Frohlich

Hans-Gerd Metzinger

Willy Leyser

Hanns P M/u/ Ller

Dietmar Strache

Gunther Bebermeier

The invention relates to a process for the production of crosslinked dental mouldings, in particular for teeth made of plastic, the compositions used therefore and the articles obtained.

Crosslinked shaped dental articles

In a construction material comprising a flexible carrier substrate impregnated or coated with a water-hardening resin, the resin contains as an additive polyether polysiloxane polyurethanes of the formula ##STR1## in which R.sup.1 is lower alkyl,

Water-hardening polymer preparations

Foaming during setting of a polyurethane fixed dressing, e.g. cast for broken arm, is minimized by utilizing as the dressing a polyisocyanate composition comprising:

Fixed dressings with greatly reduced foaming

Polyisocyanate preparations containing latent tin catalysts are made from an organic polyisocyanate and a reaction product of a sulfonyl isocyanate and an organic tin catalyst in which at least one tin-oxygen bond is present. The organic tin catalyst preferably contains a tin-alkoxy, tin-siloxy, distannoxane and/or tin-carboxylate group. The reaction product of a sulfonyl isocyanate with a tin-carboxylate must generate carbon dioxide during its formation. The sulfonyl isocyanate and organic tin compound are used in quantities such that at least one isocyanato-sulfonyl group is present for each tin-oxygen bond. These polyisocyanate preparation are storage stable and may be used to produce adhesives, coatings and foams.

Polyisocyanate preparations containing latent tin catalysts and a

Textile sheet-like structure impregnated or coated with water-hardening synthetic resin, said textile comprising organic fibers with an elasticity modulus of 200 to 2500 daN/mm.sup.2 and having an extensibility in the longitudinal direction of at least 10% before hardening of said resin is useful in preparing orthopaedic support dressings, containers, filters, pipes, reinforcing material, stiffening material, filler or sealer material for hollow spaces or joints, insulating material, in preparing decorative and artistic articles.

Textile sheet-like structure with reactive resin

The present invention is directed to isocyanato isocyanurates prepared from diisocyanates which contain a sterically unhindered isocyanate group bound to a primary aliphatic carbon atom and a sterically hindered isocyanate group which is bound to a tertiary carbon atom forming part of a cycloaliphatic ring system, said diisocyanate having an NCO content of about 20 to 50% by weight. The present invention is further directed to a process for preparing these isocyanato isocyanurates by catalytic trimerization and the use of the isocyanato isocyanurates in a process for the production of polyisocyanate polyaddition products, preferably two-component polyurethane stoving lacquers.

Isocyanurate group-containing polyisocyanates

Impregnating agents are provided consisting essentially of

Impregnating agent and its use

The present invention relates to polyisocyanate compositions containing reversibly blocked catalysts for the isocyanate addition reaction, characterized in that they contain

Polyisocyanate compositions containing reversibly blocked catalysts and

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

The present invention relates to a process for the preparation of alkoxylation products of organic carboxylic acids containing alcoholic hydroxyl groups by the reaction of any organic compounds containing at least one carboxyl group with alkylene oxides in an alkoxylation reaction in the presence of catalysts, characterized in that the catalysts used are phase transfer catalysts selected from the group consisting of

Preparation of hydroxyl group-containing alkoxylation products of

Material which hardens on access of moisture, for the production of support dressings in human medicine or veterinary medicine, which is based on a flexible carrier material impregnated and/or coated with an agent including isocyanate groups, wherein the agent contains an addition product of a sulphonyl isocyanate with a tertiary amine and/or a compound with a tin(II) or tin (IV) carboxylate structure.

Material for support dressings

The present invention relates to a process for the production of oligomeric polyisocyanates by the dimerization or trimerization of a portion of the isocyanate groups in organic polyisocyanates in the presence of tertiary phosphines or in the presence of a peralkylated phosphorus acid triamides as catalyst, followed by termination of the dimerization and/or trimerization reaction at the required degree of oligomerization by the addition of a catalyst poison, characterized in that a sulfonyl isocyanate is used as the catalyst poison. The present invention also relates to the use of the oligomeric polyisocyanates obtained by this process, optionally in admixture with unreacted starting polyisocyanate or optionally blocked by blocking agents for isocyanate groups, as the polyisocyanate component in the production of polyurethane plastics.

Process for the production of oligomeric polyisocyanates and their use

A process for increasing the duration of action of a pest-combating agent having at least one hydrogen atom which is active in Zerewitinoff reactions but which is not part of a carbamic acid ester group ##STR1## comprising linking the pest-combating agent with a polyether via a difunctional coupling member.

Process for increasing the duration of action of agents for combating

A novel pest-combating agent of increased duration of action is produced by reacting a pest-combating agent having at least one hydrogen atom active in a Zerewitinoff reaction other than a hydrogen atom which is part of a carbamic acid ester group ##STR1## with a polyether isocyanate, the reaction with the polyether isocyanate taking place on said other hydrogen atom.

Pest-combating agent having increased duration of action

Growing community of inventors

Cologne, Germany

Roland Richter