公开(公告)号：AT165851T

公开(公告)日：1998-05-15

申请号：AT93101611

申请日：1993-02-03

Applicant: BASF AG

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

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

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.

公开(公告)号：AT104997T

公开(公告)日：1994-05-15

申请号：AT90124074

申请日：1990-12-13

Applicant: BASF AG

Inventor： LUTTER HEINZ-DIETER DR ,  HINZ WERNER DR ,  DECKER WALTER ,  LEPPKES REINHARD DR ,  REICH ERHARD DR ,  PETERS REINHARD DR ,  HAASE VOLKER ,  LUGMAYR MICHAEL

IPC: C08G18/48 ,  C08G18/72 ,  C08G65/26 ,  C08G65/28 ,  C08G101/00 ,  C08J9/00

公开(公告)号：DE4203918A1

公开(公告)日：1993-08-12

申请号：DE4203918

申请日：1992-02-11

Applicant: BASF AG

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

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

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.