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    POLYMER MIXTURE HAVING IMPROVED RHEOLOGICAL PROPERTIES AND IMPROVED SHRINKING BEHAVIOUR
    16.
    发明专利
    POLYMER MIXTURE HAVING IMPROVED RHEOLOGICAL PROPERTIES AND IMPROVED SHRINKING BEHAVIOUR 未知

    公开(公告)号：CA2449895A1

    公开(公告)日：2003-01-03

    申请号：CA2449895

    申请日：2002-06-14

    Applicant: BASF AG

    Inventor： EMRI IGOR ,  RAUSCHENBERGER VOLKER ,  HORN HANS CHRISTOPH ,  VON BERNSTORFF BERND-STEFFEN

    IPC: C08L67/00 ,  C08L67/02 ,  C08L77/00 ,  C08L77/02 ,  C08L77/06 ,  C08L77/12 ,  C08L101/02 ,  C08L101/12

    Abstract: The invention relates to a thermoplastic polymer mixture containing m, m representing a natural number higher than 1, polymers Pn wherein n represent s a natural number between 1 and m, and at least one recurring functional grou p contained in the Pn polymer chain, said group(s) having the structure -(R1)x - C(O)-(R2)y- wherein x and y independently represent 0 or 1, and x + y = 1, a nd R1, R2 independently represent oxygen or nitrogen linked into the main polym er chain. The polymers Pn differ in terms of at least one characteristic relate d to molecular weight. The polymer mixture has a number average molecular weig ht Mn(P)1, a weight average molecular weight Mw(P)1, a Z average molecular weig ht Mz(P)1, a heterogeneity index Mw(P)1/Mn(P)1 and a molecular weight Mp(P)1 defined according to DIN 55672-2 in hexafluoroisopropanol as an elution agen t. After maintaining the polymer mixture at the melting point of the same, defined according to ISO 11357-1 and 11357-3, for five minutes, the polymer mixture has a number average molecular weight Mn(P)2, a weight average molecular weight Mw(P)2, a Z average molecular weight Mz(P)2, a heterogeneit y index Mw(P)2/Mn(P)2, and a molecular weight Mp(P)2 defined according to DIN 55672-2 in hexafluoroisopropanol as an elution agent. The values Mn(P)2, Mw(P)2, Mz(P)2, Mw(P)2/Mn(P)2 and Mp(P)2 lie within the triple replication standard deviation sigma (r) in relation to Mn(P)1, Mw(P)1, Mz(P)1, Mw(P)1/Mn(P)1 and Mp(P)1 according to DIN 55672-2 in hexafluoroisopropanol a s an elution agent.

    POLIAMIDAS.
    18.
    发明专利
    POLIAMIDAS. 未知

    公开(公告)号：ES2253413T3

    公开(公告)日：2006-06-01

    申请号：ES01962767

    申请日：2001-06-22

    Applicant: BASF AG

    Inventor： BEVER PAUL-MICHAEL ,  BREINER ULRIKE ,  VON BERNSTORFF BERND-STEFFEN ,  CONZELMANN GERHARD

    IPC: C08G69/42 ,  C08G69/04 ,  C08G69/16 ,  C08G69/20 ,  C08G69/28 ,  D01F6/60 ,  D01F6/80 ,  D03D15/00 ,  C08G69/02 ,  C08J5/18

    Abstract: Procedimiento para la obtención de poliamidas (VIII) accesibles a partir de monómeros (I), seleccionados a partir del grupo constituido por lactamas, ácidos w-aminocarboxílicos, nitrilos de ácido w- aminocarboxílicos, amidas de ácido w-aminocarboxílico, sales de ácido w-aminocarboxílico, ésteres de ácido w- aminocarboxílico, mezclas equimolares de diaminas y ácidos dicarboxílicos, sales de ácido dicarboxílico/diamina, dinitrilos y diaminas, o mezclas de tales monómeros, caracterizado porque la polimerización de los monómeros (I) se lleva a cabo en presencia de (II) un 0, 01 a un 0, 5 % en peso de un derivado de piperidina con impedimento estérico, que presenta un grupo funcional apto para la formación de amida respecto a la cadena principal de polímero de poliamida.

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