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    11.
    发明专利
    未知

    公开(公告)号：ES2122726T3

    公开(公告)日：1998-12-16

    申请号：ES96100873

    申请日：1996-01-23

    Applicant: BASF AG

    Inventor： HAHNLE HANS-JOACHIM DR ,  NEUFELD ECKHARD ,  SCHORNICK GUNNAR DR ,  MINGES ROLAND DR ,  ANSTOCK THOMAS DR ,  TROPSCH JURGEN DR

    IPC: B01D21/01 ,  B01J19/00 ,  B01J19/24 ,  C02F1/56 ,  C08F2/00 ,  C08F2/10 ,  C08F2/16 ,  C08F4/04 ,  C08F20/00

    Abstract: Prodn. of high mol. polymers involves: (a) polymerising water-soluble, mono-ethylenically unsatd. monomers and opt. crosslinkers contg. non-conjugated ethylenically unsatd. double bonds. in the molecule and opt. water-insol. monoethylenically unsatd. monomers in aq. soln. in the presence of polymerisation initiators in a tubular reactor; and (b) forcing the gelatinous reaction mixt. from the reactor with an inert gas. The reactor has: (i) a conical taper at one end, so the ratio of the dia. (D1) of the reactor to the dia. (D2) at the end of the cone is (2-25); and (ii) the angle between D1 at the beginning of the cone and the inner wall of the cone of more than 45 and less than 90 degrees .

    15.
    发明专利
    未知

    公开(公告)号：ES2058993T3

    公开(公告)日：1994-11-01

    申请号：ES91110635

    申请日：1991-06-27

    Applicant: BASF AG

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

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

    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 reacting the corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylenepolyamines with phosgene in the presence of at least one inert organic solvent at an elevated temperature, wherein, after the end of the phosgenation, at least one monohydric or polyhydric polyoxyalkylene alcohol, preferably having a functionality of 2 to 3, and advantageously having a hydroxyl number of 20 to 1,800, or a mixture thereof is incorporated into the reaction mixture in an effective amount, advantageously in an amount of 0.1 to 10% by weight, based on the weight of the crude MDI, the phosgene and the inert organic solvent are then separated off, optionally up to 5% by weight, based on the weight of the crude MDI, 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 thermal treatment.

    16.
    发明专利
    未知

    公开(公告)号：DK0467125T3

    公开(公告)日：1994-10-10

    申请号：DK91110635

    申请日：1991-06-27

    Applicant: BASF AG

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

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

    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 reacting the corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylenepolyamines with phosgene in the presence of at least one inert organic solvent at an elevated temperature, wherein, after the end of the phosgenation, at least one monohydric or polyhydric polyoxyalkylene alcohol, preferably having a functionality of 2 to 3, and advantageously having a hydroxyl number of 20 to 1,800, or a mixture thereof is incorporated into the reaction mixture in an effective amount, advantageously in an amount of 0.1 to 10% by weight, based on the weight of the crude MDI, the phosgene and the inert organic solvent are then separated off, optionally up to 5% by weight, based on the weight of the crude MDI, 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 thermal treatment.

    17.
    发明专利
    未知

    公开(公告)号：DE4021712A1

    公开(公告)日：1992-01-09

    申请号：DE4021712

    申请日：1990-07-07

    Applicant: BASF AG

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

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

    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 reacting the corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylenepolyamines with phosgene in the presence of at least one inert organic solvent at an elevated temperature, wherein, after the end of the phosgenation, at least one monohydric or polyhydric polyoxyalkylene alcohol, preferably having a functionality of 2 to 3, and advantageously having a hydroxyl number of 20 to 1,800, or a mixture thereof is incorporated into the reaction mixture in an effective amount, advantageously in an amount of 0.1 to 10% by weight, based on the weight of the crude MDI, the phosgene and the inert organic solvent are then separated off, optionally up to 5% by weight, based on the weight of the crude MDI, 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 thermal treatment.

    18.
    发明专利
    未知

    公开(公告)号：ES2138270T3

    公开(公告)日：2000-01-01

    申请号：ES96110026

    申请日：1996-06-21

    Applicant: BASF AG

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

    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.

    19.
    发明专利
    未知

    公开(公告)号：ES2115687T3

    公开(公告)日：1998-07-01

    申请号：ES93101611

    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

    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.

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