中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

51 records (took 0.024 seconds)

    41.
    发明专利
    未知

    公开(公告)号：DE10056251B4

    公开(公告)日：2006-06-08

    申请号：DE10056251

    申请日：2000-11-14

    Applicant: BASF AG

    Inventor： BIEDERMANN ANJA ,  KRECH RUEDIGER ,  ROTERMUND UDO ,  REICHELT MICHAEL

    IPC: C08G18/08 ,  B29C44/50 ,  C08G18/66 ,  C08J9/12

    Abstract: Polyurethane foam is produced by processing the reaction mixture (polyisocyanates and compounds with at least two NCO-reactive hydrogen atoms) in an extruder in which the pressure is higher than atmospheric pressure. A method for the production of polyurethane foam by reacting polyisocyanates with compounds containing at least two hydrogen atoms which react with isocyanate groups involves (a) mixing these reactants, (b) feeding the mixture into an extruder in which the internal pressure is above atmospheric pressure, (c) extruding the foamed mixture and (d) hardening the foam. An Independent claim is also included for polyurethane foam, especially rigid polyurethane foam, obtained by this method.

    47.
    发明专利
    未知

    公开(公告)号：AT188227T

    公开(公告)日：2000-01-15

    申请号：AT96111811

    申请日：1996-07-23

    Applicant: BASF AG

    Inventor： VON MALOTKI PETER DR ,  HENSIEK RAINER ,  REICHELT MICHAEL

    IPC: C08G18/28

    Abstract: A fireproofed isocyanate-based rigid foam (I) is obtd. by reacting (a) polyisocyanates and/or modified polyisocyanates with (b) cpd(s). contg. isocyanate-reactive H atoms and opt. (c) low molecular wt. chain extenders and/or crosslinkers, in presence of (d) blowing agents, (e) catalysts, (f) bromine-contg. fire retardant(s) and opt. (g) other additives, etc.. Fire retardant (f) is tribromo-neopentyl alcohol (TBNPA), and the crosslinking index of all the cpds. with NCO-reactive H atoms (including (f)) is at least 3.0. Also claimed is prodn. of the foam as above.

    PREPARATION OF PREPOLYMERS CONTAINING ISOCYANATE GROUPS
    48.
    发明专利
    PREPARATION OF PREPOLYMERS CONTAINING ISOCYANATE GROUPS 未知

    公开(公告)号：CA2272812A1

    公开(公告)日：1999-11-26

    申请号：CA2272812

    申请日：1999-05-26

    Applicant: BASF AG

    Inventor： REICHELT MICHAEL ,  ROTERMUND UDO ,  SCHARR VOLKER ,  GMEREK KARL-HEINZ ,  FALKE PETER

    IPC: C08G18/10 ,  C08G18/76 ,  C08G18/80 ,  C07C271/08 ,  C07C269/02 ,  C08G18/72

    Abstract: In a process for preparing prepolymers containing isocyanate groups by reacting organic isocyanates (a) with H-acid compounds (b), the reaction to give the prepolymer is carried out directly in the process stream of the isocyanate-producing plant. Also provided are the prepolymers containing isocyanate groups prepared is this way, their use for preparing PUR and also a process for preparing PUR by reacting at least one prepolymer containing isocyanate groups, if desired in admixture with further organic and/or modified organic isocyanates (a), with compounds containing at least two reactive hydrogen atoms (b) in the presence of, if desired, blowing agents (c), catalysts (d) and, if desired, further auxiliaries and/or additives (e).

    PRODUCTION OF RIGID FOAMS BASED ON ISOCYANATE
    49.
    发明专利
    PRODUCTION OF RIGID FOAMS BASED ON ISOCYANATE 未知

    公开(公告)号：CA2260343A1

    公开(公告)日：1999-08-13

    申请号：CA2260343

    申请日：1999-02-11

    Applicant: BASF AG

    Inventor： REICHELT MICHAEL ,  JUNG LUDWIG ,  ROTERMUND UDO ,  BAUM EVA

    IPC: C08G18/66 ,  C08J9/12 ,  C08J9/30

    Abstract: Rigid foams based on isocyanate are produced by reacting a) organic and/or modified organic polyisocyanates with b) at least one relatively high molecular weight compound containing at least two reactive hydrogen atoms and, if desired, c) low molecular weight chain extenders and/or crosslinkers in the presence of d) carbon dioxide as sole or additional blowing agent, e) foam stabilizers, f) catalysts and, if desired, g) further auxiliaries and/or additives, wherein at least one organosilicon compound having a relative ethylene oxide/propylene oxide weight ratio of over 70/30 is used as foam stabilizer, with the total Si content being greater than or equal to 5% by weight, based on the weight of the foam stabilizer or stabilizers used. The isocyanate-based rigid foams produced in this way can be used as insulation material.

    50.
    发明专利
    未知

    公开(公告)号：DE19744426A1

    公开(公告)日：1999-07-08

    申请号：DE19744426

    申请日：1997-10-08

    Applicant: BASF AG

    Inventor： FRITZ RALF DR ,  PRETZSCH REGINA ,  GUETTES BERND ,  REICHELT MICHAEL

    IPC: C07F9/40 ,  C08G18/28 ,  C08G18/38 ,  C08G18/66 ,  C08G18/48 ,  C09K21/14 ,  C09K3/10 ,  C08L75/04 ,  C08J3/20 ,  C08J9/34 ,  C08K5/5333 ,  C08K5/5337

    Abstract: Dialkyl-hydroxyalkane phosphonates are prepared by reacting a phosphonate and an aldehyde in the presence of a basic catalyst. Dialkyl-hydroxyalkyl phosphonates (I) of formula (1) are produced by reaction of: (A) a phosphonate of formula: (R -O)-PO(OR )-H (2), (B) an aldehyde of formula: R -COH (3), and (C) a basic catalyst, involves (1) mixing (A), (B) and (C), or (2) mixing (A) and (B) or (A) and (C) at 20-60 degrees C, and adding the subsequent component when the mixture reaches 20-60 degrees C, then heating at 61-300 degrees C for 1-30 minutes. R ,R = 1-10C alkyl, 6-13C aryl or 7-14C benzyl, optionally substituted with halogen or hydroxy; R = H, 1-10C alkyl, 6-13C aryl, 7-14C benzyl or a furfuryl Independent claims are also included for: (i) a polyurethane (II) containing (I); and (ii) a process for the production of (II) by reaction of: (D) an organic poly isocyanate, (E) a high mol. wt. compound having, at least, groups containing a hydrogen free to react with isocyanate groups, and (F) a dialkyl-hydroxyalkyl phosphonate (I).

Patent Agency Ranking