Elastane threads and method for the production thereof
    3.
    发明授权
    Elastane threads and method for the production thereof 失效
    弹性丝线及其生产方法

    公开(公告)号:US06637181B1

    公开(公告)日:2003-10-28

    申请号:US09701709

    申请日:2000-12-01

    IPC分类号: D02G302

    CPC分类号: D01F6/70 Y10T442/40

    摘要: Described is a process for producing segmented polyurethanes having improved processing characteristics in the melt state and an efficient spinning process based thereon to form highly elastic, fine linear density elastane yarn and filament having improved mechanical and thermal properties by using hydroxyalkyl-terminated polysiloxanes in combination with specific crosslinking-capable polyisocyanates in the reaction of long-chain high molecular weight polyhydroxy compounds with organic diisocyanates and low molecular weight diols and also optionally further auxiliary and additive substances in the melt.

    摘要翻译: 描述了一种在熔融状态下具有改进的加工特性的分段聚氨酯的制造方法和基于其的有效的纺丝工艺,以形成高弹性,细密度的线性密度的弹性纤维丝和具有改善的机械和热性能的长丝,通过使用羟烷基封端的聚硅氧烷与 在长链高分子量多羟基化合物与有机二异氰酸酯和低分子量二醇的反应中以及任选地在熔体中的另外的辅助和添加剂物质的反应中具有特异性交联的多异氰酸酯。

    Super-absorbent polymers
    5.
    发明授权
    Super-absorbent polymers 失效
    超吸收性聚合物

    公开(公告)号:US5496890A

    公开(公告)日:1996-03-05

    申请号:US391506

    申请日:1995-02-21

    CPC分类号: C08F8/44

    摘要: A process for the production of super-absorbent polymers with a swelling capacity in water-containing liquids of up to 1,000 g/g in which aqueous emulsions of particularly high molecular weight polymers of acrylonitrile are partly hydrolyzed by reaction with aqueous solutions of alkali metal and/or alkaline earth metal hydroxides, the polymers are precipitated in powder form by addition of water-miscible organic solvents, separated off, dried and then optionally heated for a short time. The super-absorbent polymers are used as water-storing materials, for example in sanitary articles, in agriculture or in the sheathing of electrical cables.

    摘要翻译: 一种生产具有高达1,000g / g的含水液体的溶胀能力的超吸收性聚合物的方法,其中丙烯腈特别高分子量聚合物的水性乳液通过与碱金属的水溶液反应而部分水解, /或碱土金属氢氧化物,通过加入水混溶性有机溶剂将聚合物粉末形式沉淀,分离出来,干燥,然后任选地加热短时间。 超吸收聚合物用作储水材料,例如卫生用品,农业或电缆护套中。

    Polyisocyanates containing isocyanurate groups and prepared by
trimerizing alkyl-substituted cycloaliphatic diisocyanates
    8.
    发明授权
    Polyisocyanates containing isocyanurate groups and prepared by trimerizing alkyl-substituted cycloaliphatic diisocyanates 失效
    含有异氰脲酸酯基并通过三烷基取代的环脂族二异氰酸酯制备的多异氰酸酯

    公开(公告)号:US5837796A

    公开(公告)日:1998-11-17

    申请号:US883477

    申请日:1997-06-25

    摘要: The present invention relates to a process for preparing polyisocyanates containing isocyanurate groups by trimerizing a portion of the isocyanate groups of an organic polyisocyanate component containing a) one or more diisocyanates corresponding to formula (1) ##STR1## wherein R represents a saturated, straight-chain, aliphatic hydrocarbon group having 8 to 15 carbon atoms and optionally b) up to 95 NCO equivalent-%, based on the total equivalents a) and b), of one or more organic polyisocyanates other than a), in the presence of trimerization catalysts and terminating the trimerization reaction at any desired degree of trimerization. The invention also relates to the polyisocyanates containing isocyanurate groups obtained by this process and to their use, optionally in excess starting polyisocyanates and optionally blocked with blocking agents for isocyanate groups, as an isocyanate component for preparing polyisocyanate addition products.

    摘要翻译: 本发明涉及通过将有机多异氰酸酯组分的一部分异氰酸酯基团三聚而制备含有异氰脲酸酯基的多异氰酸酯的方法,该有机多异氰酸酯组分含有a)一种或多种对应于式(1)的二异氰酸酯,其中R表示饱和 ,具有8至15个碳原子的直链脂族烃基和任选的b)基于a)和b)的总当量a)和b)至多95NCO当量,一种或多种除a)之外的有机多异氰酸酯,在 存在三聚催化剂并以任何所需的三聚程度终止三聚反应。 本发明还涉及通过该方法获得的含有异氰脲酸酯基团的多异氰酸酯基团,以及它们的用途,任选地过量起始多异氰酸酯,并任选地用异氰酸酯基团的封端剂封端,作为用于制备多异氰酸酯加成产物的异氰酸酯组分。

    Free-flowing polyamide molding compounds and blends
    10.
    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。