Bayer Aktiengesellschaft

Klaus Recker

Gerhard Grogler

Gerd Reinecke

Karl J Kraft

Otto Ganster

Jurgen Schwindt

Holger Meyborg

Wolfgang Grimm

Heinz Muller

Hans-Dieter Ruprecht

Ernst Meisert

Gerhard Dankert

Albert Awater

Cornelius Muhlhausen

Gerhard Groegler

Josef Backes

The coating of bodies rotating about an axis with a reaction mixture forming a polyurethane can be improved by making use of a sheet die disposed parallel to the axis of rotation of the body at an angle .alpha., whereby the rate of reaction of the reaction mixture and the relative movement are synchronized with the circumferential speed of the rotating body in such a way that the successive convolutions overlap in the form of scales and connect together seamlessly.

Method and device for coating a body rotating about an axis

The invention is directed to suspensions of isocyanato ureas in isocyanate prepolymers; to a process for their production by reacting mixtures of aromatic diisocyanates containing isocyanate groups of different reactivities and prepolymers containing terminal isocyanate groups, with water; and to the use of the suspensions as synthesis components in the production of polyurethane plastics.

Suspensions of isocyanato ureas in isocyanate prepolymers, a process for

The instant invention is directed to a process for the production of fiber-reinforced molded products, comprising:

Process for producing fiber-reinforced molded products

The instant invention is directed to a substantially solvent-free molding material, comprising

Solvent-free polyurethanes with fibrous reinforcing agents

The instant invention is directed to a process for the production of a light fast, transparent polyurethane elastomer comprising reacting:

Process for the preparation of polyurethane casting elastomers

A substantially solvent-free fast low temperature curing polyurethane coating composition is disclosed as well as a procedure for synthesizing it and a procedure for applying it to a flexible substrate. It has a long shelf-life yet cures in about 1 to 5 minutes at temperatures of between about 80.degree. and 180.degree. C. to give a flexible coating. The composition is a mixture of a polyisocyanate melting at more than about 100.degree. C. and a hydroxyl bearing polyurethane prepolymer based upon branched polyethers, monomeric glycols, and polyamines made with a deficit of polyisocyanate. The composition includes an isocyanate addition catalyst and a sodium aluminum silicate type molecular sieve and may include a polyester polyol as an additive or a reactant in forming the prepolymer.

Coating compositions from polyurethanes containing a molecular sieve of

This invention relates to storable, solvent-free, thermosetting polyurethane-based molding compositions containing a fibrous reinforcing material and to the production of fiber-reinforced moldings using these molding compositions.

Thermosetting molding compositions containing polyurethane and a fibrous

The instant invention relates to a process for coating the back of textile floor coverings, e.g. carpets, with polyurethane foams wherein it is possible to obtain particularly firm fixing of the nap and improved anchorage of the textile filaments. The process broadly comprises:

Coating the back of a textile floor covering with a polyurethane foam

1-SUBSTITUTED 2-METHYL-TETRAHYDROPYRIMIDINES ARE PREPARED BY REACTING AN N-substituted propylene diamine with an acetoacetic acid ester or amine at a temperature of from 0.degree. to 80.degree. C and removing the water produced in the reaction at a temperature of from 0.degree. to 80.degree. C.

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Cologne, Germany

Klaus Recker