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    11.
    发明专利
    未知

    公开(公告)号：AT247150T

    公开(公告)日：2003-08-15

    申请号：AT97117562

    申请日：1997-10-10

    Applicant: BASF AG

    Inventor： NABER BERNHARD ,  CALGUA ERWIN ,  GASSAN MICHAEL ,  NEISS VERA

    IPC: C08G18/40 ,  C08G18/50 ,  C08G18/79 ,  C08G18/83 ,  C08J9/14 ,  C08J11/24

    Abstract: A method for the preparation of polyisocyanurate foams with reduced thermal conductivity, comprises reacting optionally modified organic polyisocyanates (A) with at least one high mol.wt. compound (B) containing two or more reactive hydrogen atoms and optionally with low mol.wt. chain extenders and/or cross-linking agents (C), in the presence of catalysts (D), optional propellants (E) and optional auxiliary agents and/or additives (F). At least one recycled polyol obtained by glycolysis of polyisocyanurate foam using carrier polyols with a maximum OH content of 500 mg KOH/g and molar mass of at least 450 g/mole, is used as (B). Also claimed are polyisocyanurate foams prepared by the above method.

    14.
    发明专利
    未知

    公开(公告)号：AT165382T

    公开(公告)日：1998-05-15

    申请号：AT96110653

    申请日：1996-07-02

    Applicant: BASF AG

    Inventor： NABER BERNHARD ,  NEISS VERA ,  GASSAN MICHAEL ,  LEZIUS MARITTA

    IPC: C08G18/65 ,  C08G18/50 ,  C08G18/79 ,  C08J11/24 ,  C08L75/00

    Abstract: The prodn. of isocyanurate gp.-contg. polyols (I) comprises reacting polyisocyanurates (II) with short-chain, OH gp.-contg. cpds. (III) in presence of carrier polyols (IV) with an OH number of not more than 500 mg KOH/g and a mol. wt. of at least 450. Also claimed are polyols (I) obtd. by this process. Pref. polyols (IV) are based on glycerol and/or trimethylolpropane. The ratio of (III):(IV) = (5-20):1, and the ratio of (III + IV):(II) = (1-5):1. The process comprises heating the mixt. of (III) and (IV) to 190-240 degrees C, adding (II), reducing the temp. by 10-40 degrees C and stirring for 1.5-3 hrs. at this temp. After reaction is complete, the mixt. is either (a) cooled to 50-150 degrees C, treated with not more than 5 wt% alkali or alkaline earth metal hydroxide and stirred for 0.5-1.5 hrs. at this temp. or (b) cooled to 100-160 degrees C, treated with not more than 10 wt% monofunctional glycidyl ether and stirred for 0.5-1.5 hrs. at this temp.

    15.
    发明专利
    未知

    公开(公告)号：DE59710568D1

    公开(公告)日：2003-09-18

    申请号：DE59710568

    申请日：1997-10-10

    Applicant: BASF AG

    Inventor： NABER BERNHARD ,  CALGUA ERWIN ,  GASSAN MICHAEL ,  NEISS VERA

    IPC: C08G18/40 ,  C08G18/50 ,  C08G18/79 ,  C08G18/83 ,  C08J9/14 ,  C08J11/24

    Abstract: A method for the preparation of polyisocyanurate foams with reduced thermal conductivity, comprises reacting optionally modified organic polyisocyanates (A) with at least one high mol.wt. compound (B) containing two or more reactive hydrogen atoms and optionally with low mol.wt. chain extenders and/or cross-linking agents (C), in the presence of catalysts (D), optional propellants (E) and optional auxiliary agents and/or additives (F). At least one recycled polyol obtained by glycolysis of polyisocyanurate foam using carrier polyols with a maximum OH content of 500 mg KOH/g and molar mass of at least 450 g/mole, is used as (B). Also claimed are polyisocyanurate foams prepared by the above method.

    17.
    发明专利
    未知

    公开(公告)号：DE19718018A1

    公开(公告)日：1998-11-05

    申请号：DE19718018

    申请日：1997-04-29

    Applicant: BASF AG

    Inventor： NABER BERNHARD ,  SCHMIADE WERNER ,  GASSAN MICHAEL

    IPC: C08G18/48 ,  C08G18/83 ,  C08J11/24 ,  C08G18/64 ,  C08G18/58 ,  C08J11/10 ,  F16L9/127

    Abstract: Rigid polyurethane foam (I) is prepared by mixing (A) polyisocyanate and (B) a compound having at least 2 hydrogen atoms that react with isocyanate groups in the presence of (C) catalyst, (D) blowing agent and optionally (E) processing aids and/or additives, whereby (B) is a recycled polyol prepared by glycolysis of a polyurethane. Preferably the recycled polyol (B) is obtained by glycolysis of rigid polyurethane foam and is produced in the presence of mono and/or difunctional glycidyl ethers. The recycled polyol is used in an amount of 10-50 wt.% (w.r.t. components (B) and (C)).

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