Bayer Aktiengesellschaft

Bergwerksverband Gmbh

Peter Vehlewald

Manfred Kapps

Wulf Von Bonin

Frank Meyer

Wolfgang Cornely

Manfred Schmidt

Manfred Dietrich

Hans-Walter Illger

Hans E Mehesch

Peter Kasperek

Max Mann

Kuno Wagner

Hanns P Muller

Peter Haas

Hans-Dieter Block

Josef Witte

Manfred Hajek

Gerhard Balle

Hans Hettel

Wolfgang Konter

Peter Seifert

Klaus K&ouml;nig

Hansjurgen Rabe

Rainer Rettig

Hans-Ernst Mehesch

Peter Gruss

Friedrich Moller

Klaus K/o/ Nig

Birgit Riecks

Compositions made up of an aromatic polyisocyanate and a polyester having an average molecular weight of from about 600 to about 5000, obtainable by self-condensation of ricinoleic acid, optionally with co-utilization of a C,-C,starter polyol and optional additives. These compositions are useful as binders for the production of composite materials.

Compositions useful as binders for the production of composite materials

Method of producing press-moulding materials with polyisocyanate binders

Mixtures leading to hard polyurethane foamed materials

The present invention relates to a process for strengthening geological formations in underground mining or underground construction work by the introduction of reaction mixtures which react to form polyurethane plastics into the formations which are required to be strengthened, wherein the reaction mixtures are based on

Process for strengthening geological formations

The present invention is directed to a process for the strengthening of geological formations in underground workings and mines by the introduction of reaction mixtures which react to form polyurethanes into the formations which are to be strengthened, the reaction mixtures being based on

The present invention is directed to a process for strengthening geological formations in underground mining or other operations introducing into the formation which is to be strengthened mixtures of a polyisocyanate component (a) and a polyol component (b) which react together to form polyurethanes, characterized in that the polyol component (b) is based on mixtures of (i) organic polyhydroxyl compounds having hydroxyl numbers of about 100 to 600 and (ii) dihydric alcohols having a molecular weight of 62 to about 150, component (ii) being present in an amount of about 0.01 to 20% by weight, based on the total quantity of component (b).

The present invention is directed to a stable dispersion of a polyurea and/or a polyhydrazodicarbonamide in a relatively high molecular weight hydroxyl-group containing material, which dispersion has a solids content of from 5 to 50 percent by weight and which is obtained by reacting

Stable dispersions of polyureas and/or polyhydrazo-dicarbonamides in

The instant invention is directed to a process for the production of non-disintegrating suspensions of inorganic fillers in polyhydroxyl compounds of the type used for the production of polyurethanes, comprising reacting a suspension of an inorganic filler in a polyhydroxyl compound with from 0.1 to 2%, by weight, of a polyisocyanate, based on the weight of the suspension, at a temperature of from 30.degree. to 200.degree. C. The invention is also directed to the use of the suspension as the polyol component in the production of cellular polyurethane plastics.

Stabilized filler suspensions in polyols

The present invention relates to a process for the production of modified polyether polyols by the radical polymerization of a mixture of acrylonitrile, styrene, a salt of an .alpha.,.beta.-unsaturated monocarboxylic or polycarboxylic acid containing a primary, secondary or tertiary monoamine or polyamine and optionally copolymerizable compounds with a polyether polyol.

Process for the production of modified polyether polyols and their use

The instant invention is directed to a suspension which is stable in storage comprising:

Stable suspensions of inorganic fillers in organic polyhydroxyl

The invention relates to new polyamines, preferably containing polyether segments, a process for their preparation and their use as starting components for the production of polyurethane resins. The process involves producing ketimines, aldimines or enamines containing hydroxyl groups by reacting a hydroxyl amine with an aldehyde or ketone and removing the water by product. The ketimine, aldimine, or enamine is then reacted with an NCO prepolymer wherein the hydroxyl group of the material reacts with the isocyanate group without disturbing the blocked amine. This polyaddition product is then hydrolyzed to unblock the high molecular weight polyamine.

High molecular weight polyamines and their use in preparation of

The instant invention relates to graft polymers of vinyl phosphonic acid esters, optionally together with nitrogen-containing polymerizable vinyl compounds, on polyalkylene glycols and to a process for their production. The polymers so produced necessarily contain phosphorus and, optionally, nitrogen in the molecule. The polymers are rendered flameproof by the phosphorus and, in addition, self-extinguishing by the nitrogen.

Graft polymers of vinyl phosphonic acid esters

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Leichlingen, Germany

Peter Vehlewald