公开(公告)号：CA1225189A

公开(公告)日：1987-08-04

申请号：CA430955

申请日：1983-06-22

Applicant: BASF AG

Inventor： ZEITLER GERHARD ,  WERNER FRANK ,  BITTNER GERHARD ,  BAUMANN KARL-HEINZ ,  ROEBER ARTUR ,  METZINGER LOTHAR ,  OHLINGER RAINER ,  ZETTLER HANS D

IPC: B01J19/00 ,  B01J19/22 ,  C08G18/08 ,  C08G18/65 ,  C08G18/00

Abstract: TWO-STACE PROCESS FOR THE PREPARATION OF THERMOPLASTIC POLYURETHANE ELASTOMERS In order to prepare thermoplastic polyurethane elastomers a) organic diisocyanate, b) polyhydroxyl compounds with molecular weights of 500 to 8,000, and c) chain extenders with molecular weights of 60 to 400 in the presence of d) catalysts, and optionally e) auxiliaries, and/or f) additives are reacted in two reaction stages at temperatures from 60.degree.C to 250.degree.C. In the first reaction stage the components are continuously mixed, the reaction mixture is applied to a carrier, preferably a conveyor band of thermoplastic material, and is allowed to react at the reaction temperature until solidified. Suhsequently, the solidified reaction mixture is melted in an extruder and the reaction is completed in the second reaction stage.

公开(公告)号：BR9504534A

公开(公告)日：1997-05-27

申请号：BR9504534

申请日：1995-10-24

Applicant: BASF AG

Inventor： BAUMANN KARL-HEINZ ,  NIKOLITSCH JOHANN ,  GENZ MANFRED

IPC: B29C39/26 ,  B29C33/36 ,  B29C37/00 ,  B29C39/10 ,  B29C39/36 ,  B29C44/38 ,  B29C44/58 ,  B29K105/04 ,  B29C33/20

Abstract: In an apparatus for producing foamed plastics parts, a closed mold (1) is filled with polymer molding compound and, after the elapse of a reaction time, the finished part is removed. A plurality of identical molds (1) run on mold carriers (5) through a production installation. For the purpose of reducing the production outlay, a demolding device (11) shared by all the molds (1) is brought into operative connection successively with the molds (1) and in each case one mold (1) is opened. The movements required in this operation are executed by the demolding device (11). An unlocking unit (19) and a swiveling unit (20) of the demolding device (11) are brought into engagement with the mold (1) by a positioning unit (21), after which the mold (1) is unlocked and one mold half (1a) of the mold (1) is swung open. For unlocking the mold (1), the latter is raised against spring force and a positive locking is brought out of engagement.