PROCESS FOR PRODUCING EXPANDABLE THERMOPLASTIC BEADS WITH IMPROVED EXPANDABILITY

    公开(公告)号:CA2817678A1

    公开(公告)日:2012-05-18

    申请号:CA2817678

    申请日:2011-11-07

    Applicant: BASF SE

    Abstract: A process for producing expandable, thermoplastic polymer beads comprising cavities via extrusion of a polymer melt comprising blowing agent through a die plate and pelletization in a chamber comprising liquid under a pressure in the range from 1.5 to 15 bar, wherein the polymer melt comprising blowing agent comprises from 0.1 to 5% by weight of a nucleating agent D), from 1 to 10% by weight of a blowing agent E) which in essence remains within the polymer beads, from 0.01 to 5% by weight of a co-blowing agent F) forming the cavities, based in each case on the polymer melt comprising blowing agent, and also the expandable thermoplastic polymer bead material which can be obtained by the process, comprising cavities with an average diameter in the range from 0.1 to 50 µm.

    ELASTIC PARTICLE FOAM MATERIAL BASED ON POLYOLEFIN/STYRENE POLYMER MIXTURES

    公开(公告)号:SG174165A1

    公开(公告)日:2011-10-28

    申请号:SG2011061801

    申请日:2010-03-01

    Applicant: BASF SE

    Abstract: E.:USW ',..aattla fawn im&k snpotytafiayrao ratriwit‘bbinabts Th*. irracir*A1m:.3.41m ast:o axpagth.a.1;.›.011,17ica foagns mid at*4bambIbbiN csaariztliblblymbsc te‘mb by stSYYx..1. mixba (x.smpitnp foam part:IanP-1 and rfra ..arcoa fSrtt t ntpke'sdft ynx pt,\Wa Lt.-KU; wfkarrtpiiflas W‘(. Kttahalthi P\it-Wn "PatISW 1t1C-niriPSa?K`C P.SOYer Piliteaa tttrtaiitt-tn Ca,`, 57.9 awec,aat wak,ibt.'S kayr \ pdyraar.,51) frwi t S';..lamalt Att.tt of a poiwai ba.xj maka,9 pan k mmo g.mn) ii40*41;R2) from a 26 beetbszt "i4TiDi±it: Of pate:: ZIav'ts?, ,m.,,Ck;aa t4.-.a1 sw11,'€xt,fram al t6 Wt.:sit by mtaxt a a s"Ticeaega3WfWm gyrane-iwpfana... bA.ttax4ynaw,C2) tail 0.0 to 10 rant by m*Iht of a at's' Ritle-ali4itmaStyt.ere b*KIE r-aa:rrxbr, b) kr-.1n1, tdI porcant by• swakra of:a bk.m4r.v auctc4,2:•(> 5:1 frwa 01a 5 ;‘;',.ardant i of a rto,titria a102a,,Ateoa bkan of A) t) iattA,No suitable figure

    EXTRUDED SAN FOAMS
    35.
    发明专利

    公开(公告)号:CA2773246A1

    公开(公告)日:2011-03-10

    申请号:CA2773246

    申请日:2010-09-06

    Applicant: BASF SE

    Abstract: The invention relates to a closed-cell extruded foam that can be produced (a) by at least one styrene-acrylonitrile copolymer (SAN), and optionally at least one thermoplastic polymer from the group consisting of styrene copolymers, polyolefins, polyacrylates, polycarbonates (PC), polyesters, polyamides, polyether sulfones (PES), polyether ketones (PEK) and polyether sulfides, in order to form a polymer melt, (b) introducing between 1 and 12 wt. % (in relation to P) of a foaming constituent (T) containing less than 0.2 wt. % of water (in relation to P) and b1) between 15 and 95 wt. % (in relation to T) of carbon dioxide and b2) between 5 and 85 wt. % (in relation to T) of at least one co-foaming agent selected from the group consisting of C1-C4 alcohols and C1-C4 carbonyl compounds, into the polymer melts in order to form an expandable melt, (c) extruding the expandable melt in a region of lower pressure while expanding to form the extruded foam, and (d) optionally adding additives to form the polymer components (P) in at least one of the steps a), b) and/or c).

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