公开(公告)号：AT295380T

公开(公告)日：2005-05-15

申请号：AT01123829

申请日：2001-10-05

Applicant: BASF AG

Inventor： PFUETZE EBERHARD ,  MAGIN WALTER ,  SCHMITT ARNOLD ,  SCHMIDT MICHAEL ,  TREULING ULRICH ,  HAEBERLE KARL

IPC: C08G18/10 ,  C08G18/12 ,  C08G18/48 ,  C09J175/04

公开(公告)号：NO20015102L

公开(公告)日：2002-04-22

申请号：NO20015102

申请日：2001-10-19

Applicant: BASF AG

Inventor： PFUETZE EBERHARD ,  MAGIN WALTER ,  SCHMITT ARNOLD ,  SCHMIDT MICHAEL ,  TREULING ULRICH ,  HAEBERLE KARL

IPC: C08G18/10 ,  C08G18/12 ,  C08G18/48 ,  C09J175/04

公开(公告)号：NO20015102D0

公开(公告)日：2001-10-19

申请号：NO20015102

申请日：2001-10-19

Applicant: BASF AG

Inventor： PFUETZE EBERHARD ,  MAGIN WALTER ,  SCHMITT ARNOLD ,  SCHMIDT MICHAEL ,  TREULING ULRICH ,  HAEBERLE KARL

IPC: C08G18/10 ,  C08G18/12 ,  C08G18/48 ,  C09J175/04 ,  C09J

公开(公告)号：DE59105349D1

公开(公告)日：1995-06-08

申请号：DE59105349

申请日：1991-02-22

Applicant: BASF AG

Inventor： SCHERZER DIETRICH DR ,  MINGES ROLAND DR ,  LANGER WERNER DR ,  BRUCHMANN BERND DR ,  HEIDER WOLFGANG ,  KELLER PETER DR ,  SCHMITT ARNOLD ,  VAN PEE WILLY DR

IPC: C07C263/18 ,  C07C263/20 ,  C07C265/14

Abstract: The invention relates to a process for the preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates (crude MDI) having a reduced iodine colour value by reaction of corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylenepolyamines with phosgene in the presence of at least one inert organic solvent at elevated temperature, in which, after phosgenation of the reaction mixture is complete, low-molecular-weight alkanols, polyhydric alcohols, preferably di- to octahydric alcohols having a molecular weight of 60 to 350, or mixtures thereof are incorporated in an effective amount, advantageously in an amount of 0.01 to 5% by weight, relative to the crude MDI weight, the phosgene and the inert organic solvent are then separated off, 0 to 5% by weight, relative to the crude MDI weight, of at least one phenol-based antioxidant and/or aryl phosphite are added to the reaction product, and the reaction mixture is subjected to a heat treatment.