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    PRODUCTION OF FINELY POROUS RIGID FOAM BY USING ISOCYANATE AS BASE MATERIAL
    3.
    发明专利
    PRODUCTION OF FINELY POROUS RIGID FOAM BY USING ISOCYANATE AS BASE MATERIAL 失效

    公开(公告)号：JPH11158308A

    公开(公告)日：1999-06-15

    申请号：JP27349398

    申请日：1998-09-28

    Applicant: BASF AG

    Inventor： VOLKERT OTTO ,  ROTERMUND UDO ,  BIEDERMANN ANJA ,  HEINZ MARION

    IPC: C08J9/02 ,  B29C44/10

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a finely porous rigid foam by using an isocyanate as a base material, and further to provide an apparatus for carrying out the method. SOLUTION: This method for producing a finely porous rigid foam by reacting a polyisocyanate with a compound having at least two reactive hydrogen atoms in a hermetically sealed mold comprises (a) introducing a gas to the reactive components under pressure before inserting the reactive components into the mold, (b) pressurizing the mold before, during or after insertion of the reaction mixture, and (c) reducing the pressure in the mold after the insertion of the reaction mixture into the mold and before the hardening of the rigid foam.

    PRODUCTION OF RIGID POLYURETHANE FOAM HAVING LOW THERMAL CONDUCTIVITY
    4.
    发明专利
    PRODUCTION OF RIGID POLYURETHANE FOAM HAVING LOW THERMAL CONDUCTIVITY 失效

    公开(公告)号：JPH1180539A

    公开(公告)日：1999-03-26

    申请号：JP18602698

    申请日：1998-07-01

    Applicant: BASF AG

    Inventor： GLUECK GUISCARD DR ,  HAHN KLAUS DR ,  ROTERMUND UDO DR ,  VOLKERT OTTO

    IPC: C08J9/04 ,  C08G18/00 ,  C08G18/48 ,  C08J9/00 ,  C08K3/04 ,  C08L75/04

    Abstract: PROBLEM TO BE SOLVED: To produce the subject foam having lowered thermal conductivity and good handleability, etc., and useful as an insulation material for composite element, etc., by adding graphite to an organic polyisocyanate, etc., and a compound having reactive hydrogen atom and reacting the mixture in the presence of a foaming agent, etc. SOLUTION: The objective foam useful for filling the hollow space of a refrigeration apparatus or a heating element is produced by reacting (A) an organic polyisocyanate and/or a modified organic polyisocyanate (e.g. diphenylmethane diisocyanate) with (B) one or more kinds of compounds having >=2 reactive hydrogen atoms (e.g. polyether polyol) in the presence of (C) a foaming agent, (D) a catalyst and optionally (E) an assistant and/or an additive. In the above reaction, preferably 1-10 wt.% (based on the whole foam) of graphite is added to the component A and/or B. Preferably, >=50% of the graphite has particle diameter of

    PRODUCTION OF RIGID FOAMS CONTAINING URETHANE GROUPS OR URETHANE AND ISOCYANURATE GROUPS, AND BLOWING AGENT-CONTAINING EMULSIONS FOR THIS PURPOSE
    7.
    发明专利
    PRODUCTION OF RIGID FOAMS CONTAINING URETHANE GROUPS OR URETHANE AND ISOCYANURATE GROUPS, AND BLOWING AGENT-CONTAINING EMULSIONS FOR THIS PURPOSE 未知

    公开(公告)号：CA2070209C

    公开(公告)日：1997-05-13

    申请号：CA2070209

    申请日：1992-06-02

    Applicant: BASF AG

    Inventor： VOLKERT OTTO

    IPC: C08G18/08 ,  C08G18/00 ,  C08G18/40 ,  C08G18/65 ,  C08G18/66 ,  C08G101/00 ,  C08J9/14

    Abstract: A process for the production of rigid foams containing urethane groups or urethane and isocyanurate groups, by reacting a) an organic and/or modified organic polyisocyanate with b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms, and, if desired, c) a low-molecular-weight chain extender and/or crosslinking agent, in the presence of d) a blowing agent, e) a catalyst and, if desired, f) assistants and/or additives, in which the blowing agent (d) used is at least one vinylfluoroalkane of the formula CH2=CH-CnF2n+1 in which n is an integer from 1 to 6, (di), or a mixture of at least one such vinylfluoroalkane (di) and at least one further physical and/or chemical blowing agent (dii) which is different from (di), and blowing agent-containing emulsions which contain at least one vinylfluoroalkane and at least one starting component (a), (b), (c) or (b) and (c).

    9.
    发明专利
    未知

    公开(公告)号：BR9708926A

    公开(公告)日：1999-08-03

    申请号：BR9708926

    申请日：1997-04-24

    Applicant: BASF AG

    Inventor： VOLKERT OTTO ,  PITTRICH KLAUS

    IPC: C08G18/10 ,  C08G18/48 ,  C08G18/76 ,  C08G101/00

    Abstract: Elastic polyurethane moldings having a compact surface and a cellular core are produced by reactinga) modified organic polyisocyanates withb) at least one relatively high molecular weight compound containing at least two reactive hydrogen atoms and, if desired,c) low molecular weight chain extenders in the presence ofd) blowing agents,e) catalysts and, if desired,f) customary auxiliaries and/or additivesin a closed mold with compaction, wherein the modified organic polyisocyanate used is at least one reaction product of pure MDI and at least one polyether alcohol (polyoxyalkylene polyol), the modified organic polyisocyanate having an NCO content of

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