PROCESS FOR PRODUCING POLYURETHANE-POLYISOCYANURATE FOAMS

    公开(公告)号:DE3269728D1

    公开(公告)日:1986-04-10

    申请号:DE3269728

    申请日:1982-12-06

    Applicant: BASF AG

    Abstract: The invention describes a process for harmonizing the reaction rates for the formation of urethane and isocyanurate groups during the preparation of polyurethane-polyisocyanurate foams by reacting organic polyisocyanates with polyols in the presence of blowing agents and salts of amines having the formula as catalysts, wherein R stands for an hydrogen atom or a straight chained or branched alkyl radical with 1 to 19 carbon atoms, and n and m are equal or different whole numbers from 2 to 10.

    3.
    发明专利
    未知

    公开(公告)号:DE3700245A1

    公开(公告)日:1988-07-21

    申请号:DE3700245

    申请日:1987-01-07

    Applicant: BASF AG

    Abstract: The subject of this invention is a process for the preparation of lightweight, planar molded articles, e.g. those having a thickness from 0.1 to 40 mm and having a density of 0.015 to 0.25 g/cm3, by treating porous materials, preferably open celled or flexible or semi-rigid polyurethane foams, with an effective amount of an aqueous dispersion or emulsion of organic compounds containing NCO groups and allowing the isocyanate compound to cure, optionally while molding, at a temperature from 25 DEG C. to 180 DEG C. and optionally at a pressure of 1 to 50 bar. The invention also relates to molded articles prepared according to this process which have special mechanical properties.

    4.
    发明专利
    未知

    公开(公告)号:DE3332251A1

    公开(公告)日:1985-03-21

    申请号:DE3332251

    申请日:1983-09-07

    Applicant: BASF AG

    Abstract: The invention relates to storage-stable tris(hydroxyalkyl)isocyanurate polyol dispersions containing (a) from 2 to 70 parts by weight tris(hydroxyalkyl)isocyanurate, (b) from 98 to 30 parts by weight of at least one polyol having a functionality of from 2 to 8 and a hydroxyl number from 20 to 1800, and (c) from 0 to 20 parts by weight of one or more dispersion stabilizers. The dispersions are prepared by dissolving starting components A and B at temperatures in excess of 100 DEG C., in some cases adding a dispersion stabilizer and/or crystallization accelerator, with continuous and step-wise cooling of the mixture while stirring. The products are utilized for the preparation of polyurethane plastics, in particular polyisocyanurate foams containing polyurethane or polyurethane groups.

    6.
    发明专利
    未知

    公开(公告)号:DE3784236D1

    公开(公告)日:1993-03-25

    申请号:DE3784236

    申请日:1987-12-22

    Applicant: BASF AG

    Abstract: Light flat moulded parts (I) are mfd. by treating porous materials (II) with an organic cpd. (III) contg. an effective amt. of NCO gps. and hardening, with shaping as required; the novelty is that (III) is used in aq. dispersion or emulsion, which is used to impregnate open-cell foam materials (IV) and then crosslinked. PU parts (I) have thickness, 0.1-40 mm; density, 0.015-0.25 g/cm3; tensile strength 100-500 kPa; elingation at break 10-70%; compression hardness, 10-100 kPa at 40% deformation; thermal flexural strength (DIN 53424), 100-160 deg.C.

    STORAGE STABLE TRIS- (HYDROXYALKYL)ISOCYANURATE-POLYOL DISPERSIONS AND METHOD OF MAKING AND USING THE SAME

    公开(公告)号:DE3469539D1

    公开(公告)日:1988-04-07

    申请号:DE3469539

    申请日:1984-09-03

    Applicant: BASF AG

    Abstract: The invention relates to storage-stable tris(hydroxyalkyl)isocyanurate polyol dispersions containing (a) from 2 to 70 parts by weight tris(hydroxyalkyl)isocyanurate, (b) from 98 to 30 parts by weight of at least one polyol having a functionality of from 2 to 8 and a hydroxyl number from 20 to 1800, and (c) from 0 to 20 parts by weight of one or more dispersion stabilizers. The dispersions are prepared by dissolving starting components A and B at temperatures in excess of 100 DEG C., in some cases adding a dispersion stabilizer and/or crystallization accelerator, with continuous and step-wise cooling of the mixture while stirring. The products are utilized for the preparation of polyurethane plastics, in particular polyisocyanurate foams containing polyurethane or polyurethane groups.

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