3.
    发明专利
    未知

    公开(公告)号:DE19544487A1

    公开(公告)日:1997-06-05

    申请号:DE19544487

    申请日:1995-11-29

    Applicant: BASF AG

    Abstract: The foam is based on a copolymer (I) of styrene with 2-50 mole-% 1,1-diphenylethene (II). Also claimed are methods for making the foam in various forms. The beads are produced by impregnating (I) granulate having an average diameter of 0.1-3 mm with a volatile blowing agent in aqueous suspension at 100-180 degrees C and then either (a) cooling the suspension, separating the granulate and foaming by supplying energy in a separate stage or (b) depressurising the hot suspension and hence foaming the granulate directly. Mouldings are made by from the prefoamed beads by foaming and welding in a mould. Boards and sheets are made by plasticising (I) in an extruder, mixing with a volatile blowing agent and extrusion through a wide slit die, with foaming.

    Antistatic expandable styrene polymers in bead form

    公开(公告)号:AU647160B2

    公开(公告)日:1994-03-17

    申请号:AU8162191

    申请日:1991-08-05

    Applicant: BASF AG

    Abstract: Bead-form, antistatic, expandable styrene polymers containing …… a) a styrene polymer, … b) from 0.5 to 3% by weight, based on a), of a coating containing …… b1)from 10 to 70% by weight of finely divided silica, … b2)from 20 to 80% by weight of a hydroxyl-containing quaternary ammonium salt and, if desired, … b3)from 0.05 to 20% by weight of a conventional adhesion promoter and … b4)from 10 to 30% by weight of a conventional agent for shortening the cooling time, …… c) from 1 to 8% by weight, based on a), of a C3- to C6-hydrocarbon as blowing agent, and, if desired, … d) conventional additives in effective amounts. …

    6.
    发明专利
    未知

    公开(公告)号:DE3783292D1

    公开(公告)日:1993-02-11

    申请号:DE3783292

    申请日:1987-08-18

    Applicant: BASF AG

    Abstract: Moulding compsns. consist of (A) at least one polyoxymethylene homo- and/or copolymer, (B) at least one thermoplastic polyurethane elastomer and (C) opt. additives and (D) 0.005-2 wt.% w.r.t. the total wt. of (A) plus (B), of at least one alkaline earth silicate as additive to improve heat-stability. (D) has formula MO.xSiO2.nH2O (I) where M = alkaline earth metal, esp. Ca or Mg; X = no. 1.4-10 and n = at least zero.

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