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    5.
    发明专利
    未知

    公开(公告)号：DE3519692A1

    公开(公告)日：1986-12-04

    申请号：DE3519692

    申请日：1985-06-01

    Applicant: BASF AG

    Inventor： MUELLER GERHARD DR ,  MARX MATTHIAS DR ,  JARRE WOLFGANG DR ,  BAUMANN EDWIN ,  BUETHE INGOLF DR

    IPC: C08G18/10 ,  C08G18/32 ,  C08G18/48 ,  C08J9/00 ,  C08G18/66 ,  C08G18/14 ,  C08L75/08 ,  C08J9/02

    Abstract: The invention is a process for the preparation of elastic polyurethane flexible foams having densities from approximately 25 to 60 kg/m3, and producing molded articles in closed molds at temperatures from 25 DEG to 80 DEG C., comprising reacting (A) an organic polyisocyanate prepolymer having an isocyanate content from 6 to 20 percent by weight prepared by reacting a toluene diisocyanate and/or a diphenylmethane diisocyanate with a di- to tetrafunctional polyether polyol having a hydroxyl number from 20 to 50 and oxyethylene terminal group content of at least 10 to 30 percent by weight (B) a mixture of compounds containing reactive hydrogen atoms, comprising a mixture of (a) from 55 to 89.5 parts by weight of at least one di- to tetrafunctional polyether polyol having a hydroxyl number of from 20 to 80 and less than 10 percent by weight terminal oxyethylene groups, (b) from 0.5 to 20 parts by weight of at least one alkanolamine, and (c) from 10 to 25 parts by weight water, in the presence of (C) a blowing agent, (D) a catalyst, and optionally (E) auxiliaries and/or additives.

    PROCESS FOR THE PREPARATION OF ELASTIC FLEXIBLE POLYURETHANE FOAMS
    6.
    发明专利
    PROCESS FOR THE PREPARATION OF ELASTIC FLEXIBLE POLYURETHANE FOAMS 未知

    公开(公告)号：DE3272455D1

    公开(公告)日：1986-09-11

    申请号：DE3272455

    申请日：1982-09-09

    Applicant: BASF AG

    Inventor： BUETHE INGOLF DR ,  STRAEHLE WOLFGANG DR ,  MARX MATTHIAS DR ,  PETERS REINHARD DR

    IPC: C08G18/48 ,  C08G18/14

    Abstract: For the preparation of elastic flexible polyurethane foams with improved breaking elongation and very good setting behavior as well as densities from 7 to 120 grams per liter, organic polyisocyanates are reacted in the presence of blowing agents, catalysts and, optionally, auxiliaries and/or additives with polyols based on polyoxyalkylene polyols having terminal oxyethylene blocks of a degree of oxyethlation of 1 to 13 and which have a content of primary hydroxyl groups at the corresponding degree of oxyethylation equal or exceeding the value of curve A in the Figure in which curve A describing the relationship of the content of primary hydroxyl groups with the degree of oxyethylation.

    10.
    发明专利
    未知

    公开(公告)号：DE3316593A1

    公开(公告)日：1984-11-08

    申请号：DE3316593

    申请日：1983-05-06

    Applicant: BASF AG

    Inventor： SCHORNICK GUNNAR DR ,  BUETHE INGOLF DR ,  JACOBI MANFRED DR ,  LENZ WERNER DR ,  LEHNERER WOLFGANG DR

    IPC: C07C67/08 ,  C07C67/26 ,  C07C69/54 ,  C08F290/06 ,  C08G63/47 ,  C08G65/332 ,  C09D4/00 ,  C09D163/00 ,  C09D167/06 ,  C08G63/76 ,  C08G65/32 ,  C08G65/48 ,  C09D3/64 ,  C09D3/80

    Abstract: 1. A process for preparing an ester of acrylic or methacrylic acid with a hydroxyl-containing organic compound, which comprises esterifying a saturated polyester which contains no fewer than 2 free hydroxyl groups per molecule and may contain ether groups or a saturated polyether which contains no fewer than 2 free hydroxyl groups per molecule, this polyester or polyether having an average molecular weight ~Mn of from 400 to 4,000, with from 100 to 150 mol %, based on the OH groups of the polyester or polyether, of acrylic acid or methacrylic acid in the presence of an acidic esterification catalyst and one or more hydrocarbons forming an azeotropic mixture with water and a small amount of a polymerization inhibitor at elevated temperature with azeotropic removal of the resulting water, after the esterification removing the hydrocarbon by distillation and after neutralization of the esterification catalyst reacting the remaining acrylic or methacrylic acid with an amount, equivalent to the acid number, of an epoxy compound having no fewer than two epoxy groups per molecule until an acid number =

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