Basf Aktiengesellschaft

Elastogran Maschinenbau Gmbh & Co.

Lothar Metzinger

Otto Volkert

Hans D Zettler

Herbert Stutz

Peter Richter

August Wigger

Heinz-Ulrich Werther

Gerhard Zeitler

Heinz Bollmann

Frank Werner

Rainer Ohlinger

Josef Wallner

Gerhard Bittner

Otmar Zipp

Artur Roeber

Karl-Heinz Baumann

In order to prepare thermoplastic polyurethane elastomers

Two-stage process for the preparation of thermoplastic polyurethane

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

Process for the manufacture of polyurethane elastomers

A mixing apparatus for mixing components that interact chemically, preferably polyurethane-forming components, the apparatus including a control plunger disposed within a housing and movable along a mixing chamber between opposing inlet and return ports, the control plunger having along its wall surface return grooves for connecting the inlet ports to the return ports when the plunger is in a position blocking communication between the inlet ports and the mixing chamber wherein a wall surface portion of the control plunger which in the closing position of the plunger is disposed intermediate the return ports is provided with discrete recesses which mutually overlap in the direction of movement of the control plunger.

Mixing apparatus for chemically reacting fluid components, particularly

Laminates for the production of relief plates for flexographic printing, by imagewise exposure and washing out with a developer solution have, on a base optionally provided with an elastomeric layer, a photo-crosslinkable layer containing a photoinitiator and consisting of a polyurethane elastomer which has been prepared in a special manner from an aliphatic saturated polyesterglycol, an aliphatic diisocyanate, but-1-ene-3,4-diol and, if desired, another diol and which has a Shore A hardness of 30 to 90.degree. in the photo-crosslinked state, the elastomer being optionally mixed with a photo-crosslinked monomer.

Laminates for the manufacture of flexographic printing plates comprising

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Osnabruck, Germany

Lothar Metzinger