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    • 4. 发明授权
    • Preparation of polyphenylene ethers
    • 聚苯乙烯的制备
    • US5171825A
    • 1992-12-15
    • US695385
    • 1991-05-03
    • Carola Hedtmann-ReinBernhard CzaudernaMartina von DeessenKarl Hennig
    • Carola Hedtmann-ReinBernhard CzaudernaMartina von DeessenKarl Hennig
    • C08G65/38C08G65/44
    • C08G65/44
    • A process for preparing polyphenylene ethers from monohydric phenols which have alkyl substituents in both ortho positions and possibly also in one meta position but not in the para position, by oxidative coupling with oxygen-containing gases in the presence of an oxidation catalyst and of an electrically conducting compound which counteracts the electrostatic charge in the reaction mixture, in organic solution, comprises using as electrically conducting compound a salt of a carboxamide derivative of the formula I ##STR1## or mixtures of such salts, where R.sup.1 is a saturated or singly or multiply unsaturated aliphatic group which can have a terminal phenyl group and which contains a total of 8-30 carbon atoms, it also being possible for these carbon atoms to be interrupted by isolated oxygen atoms,R.sup.2 is hydrogen or C.sub.1 -C.sub.4 -alkyl,A is an aliphatic, araliphatic or cycloaliphatic or aromatic bridge of up to 10 carbon atoms,n and m are each 1 to 3,Q.sup..sym. is ammonium, an alkali metal cation or the equivalent of an alkaline earth metal cation or a cation of a metal of groups IVb to VIIb of the periodic table.
    • 在氧化催化剂存在下,通过与含氧气体的氧化偶联和电化学反应,由一元酚制备聚苯醚的方法,它们在邻位和可能还在一个间位而不是在对位具有烷基取代基 在有机溶液中抵抗反应混合物中的静电荷的导电化合物包括使用式I的羧酰胺衍生物或其混合物作为导电化合物的盐或其混合物,其中R1是饱和或单独或 可以具有末端苯基并且含有总共8-30个碳原子的多重不饱和脂族基团,这些碳原子也可以被分离的氧原子中断,R2是氢或C1-C4-烷基,A 是至多10个碳原子的脂族,芳脂或脂环族或芳族桥,n和m各自为1至3,Q(+)为铵,碱金属阳离子 或当量的碱金属阳离子或元素周期表IVb至VIIb族金属的阳离子。
    • 5. 发明授权
    • Preparation of polyphenylene ether/polyamide molding materials
    • 聚苯醚/聚酰胺成型材料的制备
    • US5296563A
    • 1994-03-22
    • US994255
    • 1992-12-21
    • Axel GottschalkRobert WeissKlaus MuehlbachCarola Hedtmann-ReinRobert Heinz
    • Axel GottschalkRobert WeissKlaus MuehlbachCarola Hedtmann-ReinRobert Heinz
    • C08L71/12C08L77/00C08G65/48C08G71/04C08G77/10
    • C08L77/00C08L71/12C08L71/126
    • In order to prepare thermoplastic molding materials ofA) 5-95% by weight of a modified polyphenylene ether,B) 5 to 95% by weight of a thermoplastic polyamide,C) 0 to 25% by weight of an impact-modifying rubber, andD) 0 to 50% by weight of auxiliaries and/or additives,the components A and B and if necessary the components C and D are fed individually at one or more points into an extruder, mixed with one another, and melted. The component A present in a pulverulent consistency is compacted and/or sintered under pressure and if necessary with the addition of heat, preferably at a pressure corresponding to a nip pressure of 1 to 100 kn/cm to form a porous compact before it is fed into the extruder. The compact is then modified and added as granules to the feed zone of the extruder. In this way the proportion of the fines in the polyphenylene ether is considerably reduced, so that there is virtually no further danger of dust explosions. Further advantages include an improved ease of metering and reduced electrostatic charge.
    • 为了制备A)5-95重量%的改性聚苯醚的热塑性成型材料,B)5-95重量%的热塑性聚酰胺,C)0-25重量%的抗冲击改性橡胶, 和D)0至50重量%的助剂和/或添加剂,组分A和B以及组分C和D如果需要,在一个或多个点分别进料到彼此混合并熔化的挤出机中。 存在粉碎稠度的组分A在压力下压实和/或烧结,如果需要加热,优选在相当于1至100kn / cm的压区压力的压力下形成多孔压块,然后再进料 进入挤出机。 然后将压块改性并作为颗粒加入挤出机的进料区。 以这种方式,聚苯醚中细粉的比例大大降低,实际上没有进一步的粉尘爆炸危险。 另外的优点包括改进的计量方便性和减少的静电电荷。