Bayer Aktiengesellschaft

Johannes Koster

Klaus Konig

Gerhard Grogler

Otto Ganster

Johannes Blahak

Jurgen Schwindt

Peter Heitkamper

Wolfgang Reichmann

Heinz Thomas

Hans J Meiners

Peter Fuhrmann

Hans Hubner

Helmut Porkert

The invention is directed to new sulfur-containing diisocyanates in which a mercapto, sulfoxo or sulfone group joins two aromatic nuclei together or joins an aromatic nucleus to an aliphatic group and in which at least one of the aromatically bound isocyanate groups is in the ortho-position to the sulfur atom. The invention is also directed to a process for the preparation of these new sulfur-containing diisocyanates and to their use in the isocyanate polyaddition process for the production of polyurethanes.

New diisocyanates containing sulfur and a process for their preparation

The instant invention is directed to novel compounds and the use thereof in producing polyurethane resins. The compounds generally correspond to the following formula: ##STR1## wherein n is an integer of from 1 to 5,

Odorless catalysts for the synthesis of polyurethanes

The present invention relates to an improved process for the continuous production of alkylmonoisocyanates from commercial solutions containing N-alkyl carbamic acid chlorides by thermally decomposing the N-alkyl carbamic acid chlorides in the presence of inert solvents, and recovering the pure monoisocyanates by distillation.

Process for continuously working up solutions of the type accumulating

The instant invention relates to an improved process for the continuous production of an aliphatic monoisocyanate from the corresponding N-alkyl carbamic acid aryl ester. More particularly, the invention is directed to a process for the continuous production of monoisocyanates corresponding to the formula R--NCO in which

Process for the continuous production of monoisocyanates

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Dormagen, Germany

Johannes Koster