Multilayer plastic pipe
    52.
    发明授权
    Multilayer plastic pipe 失效
    多层塑料管

    公开(公告)号:US5478620A

    公开(公告)日:1995-12-26

    申请号:US203481

    申请日:1994-02-28

    IPC分类号: F16L9/133 B29D23/00

    摘要: Multilayer plastic pipes comprising a polyamide-based inner and outer layer, wherein the inner and outer layer are connected force-lockingly by means of at least one intermediate layer made of a mixture of a linear crystalline polyester and a polyamide, have improved stability to chemical agents and improved mechanical properties.

    摘要翻译: 包括基于聚酰胺的内层和外层的多层塑料管,其中内层和外层通过由线性结晶聚酯和聚酰胺的混合物制成的至少一个中间层强制锁定而具有改善的化学稳定性 助剂和改进的机械性能。

    Bis-(thiobenzoyldisulfido)-alkanes
    53.
    发明授权
    Bis-(thiobenzoyldisulfido)-alkanes 失效
    双 - (硫代苯甲酰基二硫代)烷烃

    公开(公告)号:US5442099A

    公开(公告)日:1995-08-15

    申请号:US152702

    申请日:1993-11-16

    CPC分类号: C07C327/36 C08K5/38

    摘要: Polysulfide compounds and vulcanization compositions containing the polysulfide compounds, for use in vulcanizing rubbers, are disclosed, with the polysulfide compounds being of the formula ##STR1## wherein R.sup.1 -R.sup.4 are each, independently, hydrogen or C.sub.1 -C.sub.4 alkyl and n is 2 to 10wherein the polysulfide compounds can be used alone or in a vulcanization composition containing the polysulfide compound, sulfur, one or more additional accelerators, one or more basic compounds and, optionally, conventional rubber additives, to provide vulcanized products with improved reversion stability and ageing stability.

    摘要翻译: 公开了用于硫化橡胶的含硫化合物的多硫化物化合物和硫化组合物,其中多硫化合物具有式“C1”或C 1 -C 4烷基,n为2至10,其中多硫化物可单独使用或 在含有多硫化合物,硫,一种或多种另外的促进剂,一种或多种碱性化合物和任选的常规橡胶添加剂的硫化组合物中,以提供具有改进的逆转稳定性和老化稳定性的硫化产品。

    Process for the preparation of 2-cyanoacetoxypropionic esters
    55.
    发明授权
    Process for the preparation of 2-cyanoacetoxypropionic esters 失效
    2-氰基乙酰氧基丙酸酯的制备方法

    公开(公告)号:US5412146A

    公开(公告)日:1995-05-02

    申请号:US253347

    申请日:1994-06-03

    CPC分类号: C07C255/19 C07C253/30

    摘要: For the preparation of 2-cyanoacetoxypropionic esters, a mixture of lactic ester and cyanoacetic ester is introduced, an alkali metal alcoholate is added as catalyst and the mixture is heated while the alcohol eliminated during the course of the reaction is distilled off. The course of the reaction is followed by means of gas chromatographic analysis and the reaction is terminated prior to eliminating the theoretical amount of alcohol by destroying the catalyst by acidification. The reaction mixture is worked up by distillation and the product easily separated from the reaction mass due to the substantial absence of high boiling components.

    摘要翻译: 为了制备2-氰基乙酰氧基丙酸酯,引入乳酸酯和氰基乙酸酯的混合物,加入碱金属醇化物作为催化剂,加热混合物,同时蒸馏除去反应过程中的醇。 反应过程之后是气相色谱分析,在通过酸化破坏催化剂消除理论量的醇之前终止反应。 通过蒸馏处理反应混合物,由于实质上不存在高沸点组分,产物容易与反应物质分离。

    Method for eliminating mercury from liquids
    58.
    发明授权
    Method for eliminating mercury from liquids 失效
    从液体中去除汞的方法

    公开(公告)号:US5391217A

    公开(公告)日:1995-02-21

    申请号:US82542

    申请日:1993-06-28

    申请人: Guenter Zoche

    发明人: Guenter Zoche

    摘要: A method for eliminating mercury from mercury containing liquids by contacting the mercury-containing liquid with a plurality of fibers wherein the fibers making up the plurality of fibers have a coating of silver on the surface of the fibers, and a silver-coated fiber for use in the method are disclosed.

    摘要翻译: 一种通过使含汞液体与多种纤维接触来除去含汞液体中的汞的方法,其中构成多根纤维的纤维在纤维的表面上具有银涂层,以及使用的银涂层纤维 在该方法中公开。

    Process for the preparation of prefoamed polyolefin particles
    59.
    发明授权
    Process for the preparation of prefoamed polyolefin particles 失效
    预发泡聚烯烃颗粒的制备方法

    公开(公告)号:US5380766A

    公开(公告)日:1995-01-10

    申请号:US246166

    申请日:1994-05-19

    IPC分类号: C08J9/18

    摘要: Foamed polyolefin particles are prepared by dispersion foaming of components consisting essentially of polyolefin particles, a liquid dispersing agent and optionally a volatile blowing agent in a reaction system consisting essentially of a reactor equipped with a stirrer containing said components and a discharge jet, comprising the step of:gassing the components of the reactor by injecting an inert gas into the dispersion below the surface of the liquid in the reactor;and simultaneouslydischarging a three phase mixture of liquid dispersing agent, polymer particles and gas through said jet.

    摘要翻译: 发泡聚烯烃颗粒通过基本上由在反应体系中组成的基本上由聚烯烃颗粒,液体分散剂和任选的挥发性发泡剂组成的组分的分散发泡来制备,所述反应体系基本上由装备有包含所述组分的搅拌器的反应器和排出喷嘴组成, 通过将惰性气体注入到反应器液体表面下方的分散体中来吹送反应器的组分; 同时通过所述射流同时排出液相分散剂,聚合物颗粒和气体的三相混合物。

    Colorless and transparent, amorphously processable polyamide molding
composition having good resistance to stress cracking and good impact
strength
    60.
    发明授权
    Colorless and transparent, amorphously processable polyamide molding composition having good resistance to stress cracking and good impact strength 失效
    无色透明,无定形加工的聚酰胺模塑组合物具有良好的耐应力开裂性和良好的冲击强度

    公开(公告)号:US5360891A

    公开(公告)日:1994-11-01

    申请号:US170747

    申请日:1993-12-21

    IPC分类号: C08G69/26 C08G69/28

    摘要: A colorless and transparent, amorphously processable polyamide molding composition which has a good resistance to stress cracking and good impact strength and is resistant to alcohols, esters, ketones, fuels and boiling water, comprising the reaction product ofI. a linear aliphatic dicarboxylic acid;II.a) 35-60 mol % of trans,trans-bis(4-aminocyclohexyl)-methane; andII.b) 65-40 mol % of other aliphatic, cycloaliphatic, araliphatic or aromatic diaminesas starting components, the molar ratio of components I and II varying in the range from 0.95 to 1.05:1, preferably 0.98 to 1.02:1.The polyamide molding composition is particularly suitable for use for spectacle frames, apparatus inspection windows and covers and lamp covers.

    摘要翻译: 一种无色透明的,非晶态加工的聚酰胺模塑组合物,其具有良好的耐应力开裂性和良好的冲击强度,并且耐醇,酯,酮,燃料和沸水,包括I.的直链脂族二羧酸的反应产物; II.a)35-60摩尔%的反式,反式 - 双(4-氨基环己基) - 甲烷; 和II.b)65-40mol%的其它脂族,脂环族,芳脂族或芳族二胺作为起始组分,组分I和II的摩尔比在0.95至1.05:1,优选0.98至1.02:1的范围内变化。 聚酰胺模塑组合物特别适合用于眼镜架,装置检查窗和盖和灯罩。