Basf Aktiengesellschaft

Elastogran Gmbh

Otmar Zipp

Heinz Bollmann

Herbert Stutz

Wolfgang Jarre

Wolfgang Scholz

Eckhard Ropte

Gerhard Mueller

Lothar Metzinger

A process for the preparation of moldings, in particular resilient elements, which by virtue of a densified surface zone with substantially closed cells, have only a low water absorption, wherein a mixture comprising:

Production of closed-cell polyurethane moldings having a densified

A process for the manufacture of non-cellular and cellular polyurethane elastomers by

Process for the manufacture of polyurethane elastomers

The invention concerns a process for the manufacture of flame resistant flexible polyurethane foams by reacting a mixture of diphenylmethane diisocyanates and polyphenylene polymethylene polyisocyanates having a functionality greater than 2 containing 40 to 90 percent by weight diphenylmethane diisocyanate based on the total weight of said mixture; polyols, cyanic acid derivatives such as cyanamide, dicyandiamide, guanidine, biguanidine, melamine, cyanuric alkyl esterhydrazides and -amides as flame inhibitors, and blowing agents; as well as, possibly, chain extenders and other additives. The flexible polyurethane foams are suited for the familiar areas of applications, but especially as sound-insulation material for the construction industry.

Process for manufacture of flexible polyurethane foams with cyanic acid

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Osnabrueck, Germany

Otmar Zipp