Free-flowing polyamide molding compounds and blends
    23.
    发明授权
    Free-flowing polyamide molding compounds and blends 失效
    自由流动的聚酰胺模塑化合物和共混物

    公开(公告)号:US5102935A

    公开(公告)日:1992-04-07

    申请号:US403133

    申请日:1989-09-05

    摘要: The invention relates to new, free-flowing polyamide molding compounds and blends, characterized in that they are prepared by mixing of polyamides known per se in the melt with low molecular weight, liquid-crystalline esters and/or ester amides corresponding to formula (I) and/or liquid-crystalline, oligomeric esters and/or ester amides corresponding to formula (II) and, optionally, other additives, at least one polymeric blending component being used as a further additive in the case of polyamide blends, and to the use of these liquid-crystalline (LC) additives I and/or II as flow promoters in polyamide molding compounds and blends and to a process for the production of the new polyamide molding compounds and blends. The invention also relates to the new oligomeric esters and/or ester amides corresponding to formula (II).

    摘要翻译: 本发明涉及新的自由流动的聚酰胺模塑料和共混物,其特征在于它们通过将熔体中本身已知的聚酰胺与对应于式(I)的低分子量,液晶酯和/或酯酰胺 )和/或对应于式(II)的液晶,低聚酯和/或酯酰胺和任选的其它添加剂,在聚酰胺共混物的情况下使用至少一种聚合共混组分作为另外的添加剂,并且 使用这些液晶(LC)添加剂I和/或II作为聚酰胺模塑料和共混物中的流动促进剂,以及生产新的聚酰胺模塑料和共混物的方法。 本发明还涉及对应于式(II)的新的低聚酯和/或酯酰胺。

    Polyamide moulding compounds with improved processibility
    24.
    发明授权
    Polyamide moulding compounds with improved processibility 失效
    具有改进的可操作性的聚酰胺模塑化合物

    公开(公告)号:US5071896A

    公开(公告)日:1991-12-10

    申请号:US632536

    申请日:1990-12-24

    CPC分类号: C08K5/20 C08K5/21

    摘要: This invention relates to polyamide moulding compounds with improved processibility; to a process for their preparation, to their use for the production of moulded parts, sheet products, fibres and composite materials and to the moulded parts, sheet products, fibres, semi-finished products, composite materials and other articles produced from these moulding compounds. The invention is characterized by the use of small quantities of special amides and/or ureas which impart significantly improved flowability to the moulding compounds.

    摘要翻译: 本发明涉及具有改进的加工性的聚酰胺模塑料; 其制备方法,其用于生产模制件,片材,纤维和复合材料的用途以及由这些模塑料制成的模制件,片材产品,纤维,半成品,复合材料和其它制品 。 本发明的特征在于使用少量特殊酰胺和/或脲,其赋予模塑料显着改善的流动性。

    Process for the production of polyether polyols
    26.
    发明授权
    Process for the production of polyether polyols 失效
    制备聚醚多元醇的方法

    公开(公告)号:US6093793A

    公开(公告)日:2000-07-25

    申请号:US8986

    申请日:1998-01-20

    CPC分类号: C08G65/266

    摘要: Polyether polyols are produced by acid-catalyzed polyaddition of alkylene oxides to starter compounds having active hydrogen atoms. Perfluoroalkylsulfonic acid salts of metals from Group IIIA of the Periodic Table of Elements (corresponding to the IUPAC Convention of 1970) are used as the catalyst. The polyaddition reaction is carried out at a temperature of from 40 to 200.degree. C. at normal pressure or pressures from 0 to 20 mbar (absolute). An inert organic solvent may optionally be included in the reaction mixture. Substantially all of the catalyst is removed from the polyether polyol-containing reaction mixture by lowering the temperature and/or by addition of a precipitating agent and/or by extraction with water. If desired, the recovered catalyst may be used in subsequent polyaddition reactions.

    摘要翻译: 聚醚多元醇通过酸式催化加成环氧烷生成具有活性氢原子的起始化合物来制备。 使用元素周期表IIIA族金属的全氟烷基磺酸盐(对应于1970年的IUPAC公约)作为催化剂。 加成反应在常压或0至20毫巴(绝对)的压力下在40至200℃的温度下进行。 惰性有机溶剂可以任选地包括在反应混合物中。 通过降低温度和/或通过加入沉淀剂和/或通过用水萃取,将基本上所有的催化剂从含聚醚多元醇的反应混合物中除去。 如果需要,回收的催化剂可用于随后的加聚反应。

    Gamma-radiation-resistant polycarbonate composition
    28.
    发明授权
    Gamma-radiation-resistant polycarbonate composition 失效
    耐辐射聚碳酸酯组合物

    公开(公告)号:US5399658A

    公开(公告)日:1995-03-21

    申请号:US146284

    申请日:1993-10-29

    摘要: A gamma radiation-resistant polycarbonate-disulfide resin is disclosed. The incorporation of disulfide linkages in the structure of polycarbonate was found to enhance the resistance of the resin to the discoloration caused by exposure to gamma radiation. Accordingly, processes for the incorporation of disulfide linkages in the molecular backbone, as end-groups or as side chains are disclosed. The polycarbonate-disulfide resin may be used as a molding resin in the context of thermoplastic molding compositions as well as a stabilizing additive in polycarbonate resin.

    摘要翻译: 公开了一种耐伽马辐射的聚碳酸酯 - 二硫化物树脂。 发现在聚碳酸酯结构中引入二硫键增加了树脂对由于暴露于γ辐射引起的变色的抵抗力。 因此,公开了在分子主链中作为端基或作为侧链引入二硫键的方法。 聚碳酸酯 - 二硫化物树脂可以在热塑性模塑组合物和聚碳酸酯树脂中的稳定添加剂的情况下用作模制树脂。