公开(公告)号：BR9711230A

公开(公告)日：1999-08-17

申请号：BR9711230

申请日：1997-08-26

Applicant: BASF AG

Inventor： HERRMANN CHRISTOF ,  HUEBINGER WOLFGANG ,  KREMESKOETTER JENS ,  MINGES ROLAND ,  SCHMIDT-THUMMES JURGEN ,  MORITZ HANS-ULRICH ,  SCHMIDT WOLFGANG ,  RIDDER MAREN

IPC: B01J19/24 ,  C08F10/00 ,  F28D7/08

Abstract: A curved tubular flow reactor designed for carrying out chemical reactions continuously, for preparing mixtures and as a liquid-phase heat exchanger comprises a plurality of successive bends having alternating directions of curvature.

公开(公告)号：CA2089204C

公开(公告)日：1998-05-12

申请号：CA2089204

申请日：1993-02-10

Applicant: BASF AG

Inventor： SCHERZER DIETRICH ,  LUGMAYR MICHAEL ,  BRUCHMANN BERND ,  ZSCHIESCHE RUTH ,  SPANG CLAUDIA ,  LUTTER HEINZ-DIETER ,  MINGES ROLAND

IPC: C08G18/10 ,  C08G18/12 ,  C08G18/40 ,  C08G18/48 ,  C08G18/65 ,  C08G18/72 ,  C08G18/76 ,  C08G101/00 ,  C08J9/02 ,  C08J9/04 ,  C08L75/08 ,  C08G18/66

Abstract: The invention relates to a process for the preparation of CFC-free, flexible polyurethane foams or molded foams by reacting A) liquid polyisocyanate mixtures containing bonded urethane groups and having a content of NCO groups of from 20 to 30% by weight, these mixtures themselves being prepared by reacting a mixture of diphenylmethane diisocyantes and polyphenyl-poly-methylene polyisocyanates (crude diphenylmethane diisocyanate) with a polyether-polyol mixture, having a hydroxyl number of from 120 to 25, of at least one polyoxypropylene glycol and at least one trifunctional polyoxypropylene-polyoxyethylene glycol having a content of ethylene oxide units of from 90 to 10% by weight or by reacting 4,4'-diphenylmethane diisocyanate (diphenylmethyl diisocyanate) or an diphenylmethane diisocyanate isomer mixture with said polyether-polyol mixture to give an NCO-containing quasi-prepolymer and diluting this quasi-prepolymer with crude diphenylmethane diisocyanate, with B) relatively high-molecular-weight polyhydroxyl compound, and, if desired, C) low-molecular-weight chain extenders and/or cross-linking agents, in the presence of D) blowing agents, E) catalysts and, if desired, F) assistants and/or additives, and to the polyisocyanate mixtures (A) which have been modified by means of urethane groups and can be used according to the invention.

公开(公告)号：AU4207597A

公开(公告)日：1998-03-19

申请号：AU4207597

申请日：1997-08-26

Applicant: BASF AG

Inventor： HERRMANN CHRISTOF ,  HUBINGER WOLFGANG ,  KREMESKOTTER JENS ,  MINGES ROLAND ,  SCHMIDT-THUMMES JURGEN ,  MORITZ HANS-ULRICH ,  SCHMIDT WOLFGANG ,  RIDDER MAREN

IPC: B01J19/24 ,  C08F10/00 ,  F28D7/08

Abstract: A curved tubular flow reactor designed for carrying out chemical reactions continuously, for preparing mixtures and as a liquid-phase heat exchanger comprises a plurality of successive bends having alternating directions of curvature.

公开(公告)号：CA2089204A1

公开(公告)日：1993-08-12

申请号：CA2089204

申请日：1993-02-10

Applicant: LUTTER HEINZ DIETER ,  BRUCHMANN BERND ,  SPANG CLAUDIA ,  MINGES ROLAND ,  SCHERZER DIETRICH ,  LUGMAYR MICHAEL ,  ZSCHIESCHE RUTH ,  BASF AG

Inventor： LUTTER HEINZ-DIETER ,  BRUCHMANN BERND ,  SPANG CLAUDIA ,  MINGES ROLAND ,  SCHERZER DIETRICH ,  LUGMAYR MICHAEL ,  ZSCHIESCHE RUTH

IPC: C08G18/10 ,  C08G18/12 ,  C08G18/40 ,  C08G18/48 ,  C08G18/65 ,  C08G18/72 ,  C08G18/76 ,  C08G101/00 ,  C08J9/02 ,  C08G18/79 ,  C08G18/66 ,  C08L75/08 ,  C08J9/04

Abstract: The invention relates to a process for the preparation of CFC-free flexible polyurethane(moulded) foams by reacting A) liquid polyisocyanate mixtures containing bonded urethane groups and containing from 20 to 30% by weight of NCO groups, themselves prepared by reacting a mixture of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates (crude MDI) with a polyether-polyol mixture having a hydroxyl number of from 120 to 25 comprising at least one polyoxypropylene glycol and at least one trifunctional polyoxypropylene polyoxyethylene polyol containing from 90 to 10% by weight of ethylene oxide units or by reacting 4,4'-diphenylmethane diisocyanate (MDI) or an MDI isomer mixture with said polyether polyol mixture to give an NCO-containing quasi-prepolymer, and diluting this quasi-prepolymer with crude MDI, with B) relatively high-molecular-weight polyhydroxyl compounds and optionally C) low-molecular-weight chain extenders and/or crosslinking agents, in the presence of D) blowing agents E) catalysts and optionally F) auxiliaries and/or additives, and to the urethane group-modified polyisocyanate mixtures (A) which can be used according to the invention.