公开(公告)号：CA2102821C

公开(公告)日：1998-11-03

申请号：CA2102821

申请日：1993-11-10

Applicant: BASF AG

Inventor： POHL SIEGMUND ,  LEHRICH FRIEDHELM ,  SCHOLZ GUENTER ,  STREU JOACHIM ,  TESCH HELMUT ,  SWOBODA JOHANN ,  GENZ MANFRED ,  BRUCHMANN BERND ,  MINGES ROLAND

IPC: C07C265/10 ,  C07C265/12 ,  C07C267/00 ,  C08G18/00 ,  C08G18/02 ,  C08G18/71 ,  C08K5/29

Abstract: 4,4'-disubstituted bis-(2,6-diisopropylphenyl)carbodiimides of the formula (I) (see fig. I) where R is 1-methyl-1-phenylethyl, phenoxy or tert-butyl, a process for their preparation, their use as stabilizers against hydrolytic degradation of polyaddition and polycondensation products containing ester groups, and the novel 4-(1-methyl-1-phenylethyl)-2,6-diisopropyl-, 4-phenoxy-2,6-diisopropyl- and 4-tert-butyl-2,6-diisopropylphenyl isocyanates which can be used for their preparation.

公开(公告)号：CA2046365C

公开(公告)日：1996-08-13

申请号：CA2046365

申请日：1991-07-05

Applicant: BASF AG

Inventor： SCHERZER DIETRICH ,  MINGES ROLAND ,  BRUCHMANN BERND ,  HEIDER WOLFGANG ,  VAN PEE WILLY ,  KELLER PETER

IPC: C07C263/10 ,  C07C263/18 ,  C07C263/20 ,  C07C265/14 ,  C08G18/76

Abstract: Mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates (crude MDI) of reduced iodine color number are prepared by reacting the corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylenepolyamines with phosgene in the presence of at least one inert organic solvent at elevated temperature, at least one monohydric or polyhydric polyoxyalkylene alcohol, preferably having a functionality of from 2 to 3, and advantageously having a hydroxyl number of from 20 to 1800, or mixtures thereof in an effective amount, expediently in an amount of from 0.1 to 10% by weight, based on the weight of the crude MDI, being introduced into the reaction mixture when the phosgenation is complete, the phosgene and the inert organic solvent then being removed, up to 5% by weight, based on the weight of crude MDI, of at least one phenol-based antioxidant and/or aryl phosphite being added, if desired to the reaction product, and the reaction mixture being heated.

公开(公告)号：BR9402198A

公开(公告)日：1995-03-07

申请号：BR9402198

申请日：1994-06-07

Applicant: BASF AG

Inventor： POHL SIEGMUND ,  LEHRICH FRIEDHELM ,  GENZ MANFRED ,  BRUCHMANN BERND ,  TESCH HELMUT ,  MINGES ROLAND ,  STREU JOACHIM

IPC: C07B61/00 ,  C07C267/00 ,  C07C271/20 ,  C07C273/18 ,  C07C275/14 ,  C07C275/24 ,  C07C275/26 ,  C07C275/40 ,  C08G18/02 ,  C08G18/28 ,  C08G18/66 ,  C08G18/79 ,  C08K5/29 ,  C08L75/04

Abstract: The subjects of the invention are novel carbodiimides and/or oligomeric polycarbodiimides having terminal isocyanate, urethane and/or urea groups, obtainable e.g. by condensation with elimination of carbon dioxide of 1,3-bis(1-methyl-1-isocyanatoethyl)benzene and thereafter optionally partial or complete reaction of the free isocyanate groups of the resulting (poly)carbodiimides with aliphatic, cycloaliphatic or araliphatic amines, alcohols and/or alkoxypolyoxyalkylene alcohols, a process for their preparation and their use as a stabiliser against the hydrolytic degradation of polyaddition and polycondensation products containing ester groups.

公开(公告)号：DE59702114D1

公开(公告)日：2000-09-07

申请号：DE59702114

申请日：1997-08-26

Applicant: BASF AG

Inventor： HERRMANN CHRISTOF ,  HUEBINGER WOLFGANG ,  KREMESKOETTER JENS ,  MINGES ROLAND ,  SCHMIDT-THUEMMES JUERGEN ,  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：MX9602508A

公开(公告)日：1997-04-30

申请号：MX9602508

申请日：1996-06-27

Applicant: BASF AG

Inventor： SCHERZER DIETRICH ,  BRUCHMANN BERND ,  MINGES ROLAND ,  KELLER PETER ,  PEE WILLY VAN ,  HEIDER WOLFGANG ,  POHL SIEGMUND ,  OTTO BERNHARD ,  JACOBS PAUL

IPC: C07C263/10 ,  C07C263/20 ,  C07C265/12 ,  C07C265/14 ,  C08G18/02

Abstract: Un proceso para preparar mezclas de diisocianatos de difenilmetano y poliisocianatos de polifenilpolimetileno que tienen un numero de color de yodo reducido y un contenido de cloro reducido haciendo reaccionar las mezclas correspondientes de difenilmetandiaminas y polifenilpolimetilenpoliaminas con fosgeno en presencia de por lo menos un solvente orgánico inerte a temperatura elevada, separar el exceso de fosgeno y el solvente después de completarse la fosgenacion y tratar térmicamente el producto de reaccion, en donde una mezcla de agua y por lo menos un alcohol de polioxialquileno monohídrico o polihídrico o una mezcla de los mismos se incorpora en una cantidad efectiva en la mezcla de reaccion después de que se completa la fosgenacion, en presencia o ausencia de fosgeno.

公开(公告)号：CA2036538C

公开(公告)日：1996-04-16

申请号：CA2036538

申请日：1991-02-18

Applicant: BASF AG

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

IPC: C07C263/18 ,  C07C263/20 ,  C07C265/14 ,  C08G18/76

Abstract: Mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates (crude MDI) having a reduced iodine color number are prepared by reacting the corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylene-polyamines with phosgene in the presence of one or more inert organic solvents at elevated temperatures by a process in which low molecular weight alkanols, polyhydric alcohols, preferably dihydric to octahydric alcohols having a molecular weight of from 60 to 350, or mixtures thereof are incorporated in an effective amount, advantageously in an amount of from 0.01 to 5% by weight, based on the weight of crude MDI, into the reaction mixture after the end of the phosgenation, the phosgene and the inert organic solvent are then separated off, from 0 to 5% by weight, based on the weight of crude MDI, of one or more phenol-based antioxidants and/or aryl phosphite are added to the reaction product, and the reaction mixture is subjected to a thermal treatment.

公开(公告)号：CA2102821A1

公开(公告)日：1994-05-12

申请号：CA2102821

申请日：1993-11-10

Applicant: BASF AG

Inventor： POHL SIEGMUND ,  LEHRICH FRIEDHELM ,  BRUCHMANN BERND ,  MINGES ROLAND ,  TESCH HELMUT ,  SWOBODA JOHANN ,  GENZ MANFRED ,  SCHOLZ GUENTER ,  STREU JOHANN

IPC: C07C265/10 ,  C07C265/12 ,  C07C267/00 ,  C08G18/00 ,  C08G18/02 ,  C08G18/71 ,  C08K5/29

Abstract: The invention relates to novel 4,4'-disubstituted bis(2,6-diisopropylphenyl)carbodiimides of the formula (I) in which R is a 1-methyl-1-phenylethyl, phenoxy or tert-butyl radical, to a process for their preparation and to their use as stabilisers with respect to the hydrolytic degradation of ester group-containing products of addition and condensation polymerisation, and to the novel compounds which can be used to prepare them, namely 4-(1-methyl-1-phenylethyl)-2,6-diisopropylphenyl, 4-phenoxy-2,6-diisopropylphenyl and 4-tert-butyl-2,6-diisopropylphenyl isocyanates.

公开(公告)号：MX9306928A

公开(公告)日：1995-01-31

申请号：MX9306928

申请日：1993-11-05

Applicant: BASF AG

Inventor： POHL SIEGMUND ,  LEHRICH FRIEDHELM ,  BRUCHMANN BERND ,  MINGES ROLAND ,  TESCH HELMUT ,  SWOBODA JOHANN ,  GENZ MANFRED ,  SCHOLZ GUENTER ,  STREU JOHANN

IPC: C07C265/10 ,  C07C265/12 ,  C07C267/00 ,  C08G18/00 ,  C08G18/02 ,  C08G18/71 ,  C08K5/29 ,  C07C15/16

Abstract: The invention relates to novel 4,4'-disubstituted bis(2,6-diisopropylphenyl)carbodiimides of the formula (I) in which R is a 1-methyl-1-phenylethyl, phenoxy or tert-butyl radical, to a process for their preparation and to their use as stabilisers with respect to the hydrolytic degradation of ester group-containing products of addition and condensation polymerisation, and to the novel compounds which can be used to prepare them, namely 4-(1-methyl-1-phenylethyl)-2,6-diisopropylphenyl, 4-phenoxy-2,6-diisopropylphenyl and 4-tert-butyl-2,6-diisopropylphenyl isocyanates.

公开(公告)号：GB2277324A

公开(公告)日：1994-10-26

申请号：GB9407646

申请日：1994-04-18

Applicant: BASF AG

Inventor： STERZEL HANS-JOSEF ,  RUETTER HEINZ ,  DAUNS HARALD ,  MATTHIES HANS GEORG ,  MINGES ROLAND

IPC: C08G63/08 ,  C08G63/78

Abstract: A polylactide is provided having a number average molecular weight of greater than 30,000 or a weight average molecular weight of greater than 60,000, wherein the proportion by weight in the molecular weight range up to 10,000 and in the molecular weight range above 500,000 is in each case from 5 to 15%. The polylactide may be prepared either by adding initiator during the production of the polymer in a plurality of portions at different times and/or at a plurality of locations if the process is carried out continuously or by using both a monofunctional initiator and a polyfunctional initiator or by carrying out the polymerisation in a continuous stirred reactor.

公开(公告)号：DE59603326D1

公开(公告)日：1999-11-18

申请号：DE59603326

申请日：1996-06-21

Applicant: BASF AG

Inventor： SCHERZER DIETRICH ,  BRUCHMANN BERND ,  MINGES ROLAND ,  KELLER PETER ,  VAN PEE WILLY ,  HEIDER WOLFGANG ,  POHL SIEGMUND ,  OTTO BERNHARD ,  JACOBS PAUL ,  SEYFERT WILFRIED

IPC: C07C263/10 ,  C07C263/20 ,  C07C265/12 ,  C07C265/14

Abstract: Prodn. of mixts. of diphenylmethanedi-isocyanates and polyphenyl-polymethylene-polyisocyanates (i.e. crude MDI) with a low iodine number and a low chlorine content comprises (a) reacting the corresp. mixts. of diamines and polyamines (MDA) with phosgene in presence of inert solvent(s) at elevated temp., (b) removing excess phosgene and solvent and (c) thermal treatment of the prod.. After phosgenation (a), an effective amt. of a mixt. (I) of water and mono- or polyhydric polyoxyalkylene alcohol(s) (II) is added to the reaction mixt. in the presence or absence of phosgene.