公开(公告)号：JPH10158503A

公开(公告)日：1998-06-16

申请号：JP32067797

申请日：1997-11-21

Applicant: BASF AG

Inventor： GENZ MANFRED DR ,  PRISSOK FRANK DR ,  HORN PETER DR ,  KRECH RUEDIGER ,  LEHR GERHARD ,  KING HORST DR

IPC: C08G18/08 ,  C08J11/06 ,  C08L75/04

Abstract: PROBLEM TO BE SOLVED: To obtain the subject polyurethane by using a means capable of performing a thermoplastic processing without a troublesome chemical treatment by adding a crushed state of crosslinked polyurethane to a reaction product mixture. SOLUTION: A thermoplastic polyurethane is produced by reacting isocyanate with a compound reactive with the isocyanate in the presence or absence of a chain extender, a catalyst and a usual auxiliary and an additive. In the process, crosslinked polyurethane in crushed shape is added to the reaction mixture before, during and/or after the reaction. Preferably, a dimension of the crushed crosslinked polyurethane is within the range of 0.1-25mm and a weight ratio of the crushed polyurethane to the reaction mixture is (0.001:1)-(4:1), and an equivalent ratio of the isocyanate group to total or the reactive hydrogen atom is (0.9:1)-(1.5:1).

公开(公告)号：DE19648192A1

公开(公告)日：1998-06-04

申请号：DE19648192

申请日：1996-11-21

Applicant: BASF AG

Inventor： GENZ MANFRED DR ,  PRISSOK FRANK DR ,  HORN PETER DR ,  KRECH RUEDIGER ,  LEHR GERHARD ,  KING HORST DR

IPC: C08G18/08 ,  C08J11/06 ,  C08L75/04 ,  C08J11/04 ,  C08G18/40 ,  C08G18/65

Abstract: A process for the production of thermoplastic polyurethane by reacting (a) isocyanates with (b) isocyanate-reactive compounds, optionally in presence of (c) chain extenders, (d) catalysts and (e) conventional additives etc., in which pulverised crosslinked polyurethane is added to the reaction mixture before, during and/or after reaction.

公开(公告)号：AT261468T

公开(公告)日：2004-03-15

申请号：AT97119148

申请日：1997-11-03

Applicant: BASF AG

Inventor： GENZ MANFRED DR ,  PRISSOK FRANK DR ,  HORN PETER DR ,  KRECH RUEDIGER ,  LEHR GERHARD ,  KING HORST DR

IPC: C08G18/08 ,  C08J11/06 ,  C08L75/04

公开(公告)号：DE4102174A1

公开(公告)日：1992-07-30

申请号：DE4102174

申请日：1991-01-25

Applicant: BASF AG

Inventor： BOTT KASPAR DR ,  KING HORST DR ,  SPANG CLAUDIA DR ,  MINGES ROLAND DR ,  STRAEHLE WOLFGANG DR

IPC: C08G18/08 ,  C08G18/00 ,  C08G18/10 ,  C08G18/42 ,  C08G18/44 ,  C08G18/65 ,  C08G18/76 ,  C08G64/18 ,  C08G101/00 ,  C08J9/02

Abstract: The invention relates to a process for the preparation of cellular polyurethane elastomers by reacting …… a) organic and/or modified organic polyisocyanates with … b) a polyether polycarbonate diol containing bonded polyoxytetramethylene glycol radicals having a mean molecular weight Mn (number average) of from 150 to 500, and optionally … c) low-molecular-weight chain extenders and/or crosslinking agents, … in the presence of … d) blowing agents, … e) catalysts and … f) optionally additives and/or assistants. …