公开(公告)号：DE19638257A1

公开(公告)日：1998-03-26

申请号：DE19638257

申请日：1996-09-19

Applicant: BASF AG

Inventor： DINSCH STEFAN ,  WINKLER JUERGEN ,  KNORR GOTTFRIED DR

IPC: C08G18/48 ,  C08G18/50 ,  C08G65/26 ,  C08G81/00

Abstract: A process for the production of polyether-ols (I) by the addition of ethylene oxide (EO) and optionally higher alkylene oxides (HAO) to (a) aromatic amines, comprising (1) reacting amine (a) with EO in presence of 0-0.05 wt% catalyst and in the absence of substances with terminal hydroxyl groups and/or water (b), then (2) adding a further 0.05-0.5 wt% catalyst plus EO and/or HAO and completing the reaction, optionally with the addition of (b). Also claimed are (i) polyether-ols (I) obtained by this process, (ii) polyisocyanate polyaddition products obtained by reacting (I) with polyisocyanates (II) and optionally chain extenders and/or crosslinkers, catalysts, blowing agents and other additives etc., and (iii) rigid foam containing (I).

公开(公告)号：ES2110460T3

公开(公告)日：1998-02-16

申请号：ES92117083

申请日：1992-10-07

Applicant: BASF AG

Inventor： HORN PETER DR ,  HINZ WERNER DR ,  KNOBLAUCH GEORG ,  RAMSTEINER FALKO DR ,  KNORR GOTTFRIED DR

IPC: A61L29/00 ,  A61F2/00 ,  A61L27/34 ,  A61M5/00 ,  B01D63/02 ,  C08G18/02 ,  C08G18/10 ,  C08G18/12 ,  C08G18/48 ,  C08G18/50 ,  C08G18/66 ,  C08G18/76

Abstract: The invention relates to transparent, autoclavable, non-cytotoxic, essentially compact polyurethane embedding compositions which are prepared by reacting a) modified diphenylmethane diisocyanates with b) compounds with at least two reactive hydrogens, which contain or are composed of b1) at least one polyether-polyol with an average functionality of from 3 to 8, a hydroxyl number of from 200 to 1000 and an alkali metal ion content of from 150 to 1200 ppm or, preferably, a mixture of (b1) and castor oil and/or at least one polyetherpolyol (b2) with a functionality of from 2 to 3, a hydroxyl number of from 90 to 200 and an alkali metal ion content of less than 10 ppm in the presence or absence of c) catalysts and to a process for preparing the polyurethane embedding compositions and to the use thereof for articles used in medicine.

公开(公告)号：DE19630281A1

公开(公告)日：1998-01-29

申请号：DE19630281

申请日：1996-07-26

Applicant: BASF AG

Inventor： GUETTES BERND ,  HINZ WERNER DR ,  SCHERZER DIETRICH DR ,  TISCHER GERLINDE ,  KNORR GOTTFRIED DR

IPC: C08G18/12 ,  C08G18/48 ,  C08G63/668 ,  C08G65/332 ,  F25D23/06 ,  C08G18/42 ,  C08G18/66 ,  C08G65/26 ,  C08G65/32 ,  C08G63/85 ,  C08L75/04 ,  C08J9/04

Abstract: A method for the preparation of polyurethane foams comprises the reaction of: (A) optionally modified organic di- and/or polyisocyanates; with (B) polyether polyols, prepared by polymerisation of alkylene oxides with starter compounds containing functional hydrogen atoms and optional additional high molecular weight compounds containing at least two reactive hydrogen atoms; and (C) optional low molecular weight chain extenders and/or cross-linking agents ; in the presence of (D) propellents; (E) catalysts; and (F) optional further auxiliary agents and/or additives. (B) are treated with carboxylic acids containing at least four carbon atoms during and/or after the polymerisation reaction between alkylene oxides and H-functional starter compounds.