41.
    发明专利
    未知

    公开(公告)号:DE59909859D1

    公开(公告)日:2004-08-05

    申请号:DE59909859

    申请日:1999-04-28

    Applicant: BASF AG

    Abstract: Thermoplastic molding compositions compriseA) from 5 to 96% by weight of a polyester,B) from 1 to 30% by weight of a nitrogen compound, excluding melamine cyanurate,C) from 0.1 to 30% by weight of a phosphinate of formula I or of a diphosphinate of formula II or of polymers of these or mixtures of these as defined in the specificationD) from 0 to 5% by weight of at least one ester or amide of saturated or unsaturated aliphatic carboxylic acids having from 10 to 40 carbon atoms with saturated aliphatic alcohols or amines having from 2 to 40 carbon atoms, andE) from 0 to 60% by weight of other additives, where the total of the percentages by weight of components A) to E) is 100%.

    Continuous preparation process of polybutylene terephthalate from terephthalic acid and butanediol

    公开(公告)号:CZ20014648A3

    公开(公告)日:2002-03-13

    申请号:CZ20014648

    申请日:2000-06-09

    Applicant: BASF AG

    Abstract: The invention relates to a method for the continuous production of polybutylene terephthalate from terephthal acid and 1,4-butane diole, comprising the following stages: a) direct esterification of terephthal acid with 1,4-butane diole in a reactor cascade of at least two reactors b) pre-condensation of the esterification product obtained in stage a), c) polycondensation of the pre-condensate obtained in stage b), whereby the temperature of the reactor cascade in stage a) is progressively decreased during its operation.

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