Avoiding an explosive gas phase in gas/liquid reactions
    32.
    发明授权
    Avoiding an explosive gas phase in gas/liquid reactions 失效
    在气/液反应中避免爆炸性气相

    公开(公告)号:US4482696A

    公开(公告)日:1984-11-13

    申请号:US465760

    申请日:1983-02-11

    摘要: A coherent explosive gas phase in a gas/liquid reactor comprising a tubular body which is closed at the top and into which one or more jets of liquid which are fed from a liquid circulation and are directed downward, emerge from one or more nozzles located at the highest point of the reactor, and entrain a gas phase which is to be dispersed, introduce it into the liquid and finally produce complete dispersion of the gas, is avoided by a method wherein, before start-up of the liquid circulation, the inactive reactor is charged with an amount of liquid reactant such that a gas space corresponding to the subsequent gas hold-up of dispersed bubbles under operating conditions remains at the top of the reactor, this gas space is filled with a gas, at a pressure p.sub.1, which is inert under the reaction conditions, and the gaseous reactant is fed to the reactor only when, under the action of the liquid jet or jets, the inert gas has been dispersed into a hold-up of dispersed bubbles so that a coherent gas phase no longer exists.

    摘要翻译: 在气/液反应器中的相干爆炸性气相,包括管状主体,该管状体在顶部封闭,并且从液体循环进给并被向下引导的一个或多个液体射流从该管状体中的一个或多个喷嘴出射 反应器的最高点,并且夹带待分散的气相,将其引入液体中并最终产生气体的完全分散,通过其中在液体循环启动之前的非活性的方法避免了 反应器装有一定量的液体反应物,使得在操作条件下与分散气泡的随后气体保持相对应的气体空间保持在反应器的顶部,该气体空间以压力p1填充气体, 其在反应条件下是惰性的,并且气体反应物仅在液体射流或喷射作用下被输送到反应器中时,惰性气体已经分散到分散的气泡的滞留物中,使得coh 气相不再存在。

    Poly (phenylene ethers) and their preparation
    33.
    发明授权
    Poly (phenylene ethers) and their preparation 失效
    聚(苯醚)及其制备方法

    公开(公告)号:US4743661A

    公开(公告)日:1988-05-10

    申请号:US892473

    申请日:1986-08-05

    IPC分类号: C08G65/48 C08F283/08

    CPC分类号: C08G65/485

    摘要: High molecular weight polyphenylene ethers are prepared from monohydric phenols by a conventional polycondensation, by a method in which the resulting polymers are reacted with an epoxide of the general formula (I) ##STR1## where R.sup.1 and R.sup.2 can be identical or different and are each alkyl, cycloalkyl, aryl, aryloxy, alkoxy or carboxyalkyl, each of which may contain a further epoxide group, or C.sub.3 -C.sub.20 -alkyl-substituted amino, or R.sup.1 is hydrogen and R.sup.2 is one of the above groups, or R.sup.1 and R.sup.2 form part of a cycloalkyl ring.

    摘要翻译: 通过常规缩聚由一元酚制备高分子量聚苯醚,通过其中所得聚合物与通式(I)的环氧化物(I)反应的方法,其中R 1和R 2可以相同或不同 并且各自为烷基,环烷基,芳基,芳氧基,烷氧基或羧基烷基,其中每一个可以含有另外的环氧基团或C 3 -C 20烷基取代的氨基,或者R 1为氢,R 2为上述基团之一,或R 1 并且R 2形成环烷基环的一部分。

    Wholly aromatic polyesters and preparation thereof
    34.
    发明授权
    Wholly aromatic polyesters and preparation thereof 失效
    全芳香族聚酯及其制备方法

    公开(公告)号:US4728715A

    公开(公告)日:1988-03-01

    申请号:US937717

    申请日:1986-12-04

    CPC分类号: C08G63/605 C09K19/3809

    摘要: Wholly aromatic polyesters which form a liquid-crystalline fiber-forming melt below 300.degree. C. and are composed of(a) from 10 to 25 mol % of repeat units of the formula I ##STR1## (b) from 5 to 15 mol % of repeat units of the formula II ##STR2## (c) from 5 to 15 mol % of repeat units of the formula III ##STR3## (d) not less than 10 mol % of repeat units of the formula IV ##STR4## and (e) a molar amount corresponding to the total amount of (a), (b) and (c) of repeat units of the formula V ##STR5## the molar proportions of components a, b, c, d and e adding up to 100 mol % in each case, the preparation thereof and fibers, films, moldings and surface coatings prepared therefrom.

    摘要翻译: 在低于300℃下形成液晶纤维形成熔体的全芳族聚酯,由(a)10-25摩尔%的式I(b)的重复单元组成,其为5至15摩尔 式II II(c)的重复单元的百分比5至15摩尔%的式III的重复单元III(d)不少于10摩尔%的式IV的重复单元

    Thermoplastic molding materials based on nylons and styrene copolymers
    36.
    发明授权
    Thermoplastic molding materials based on nylons and styrene copolymers 失效
    基于尼龙和苯乙烯共聚物的热塑性成型材料

    公开(公告)号:US4965318A

    公开(公告)日:1990-10-23

    申请号:US218977

    申请日:1988-07-14

    CPC分类号: C08L25/04 C08L77/00

    摘要: Thermoplastic molding materials contain(A) from 5 to 95% by weight of a nylon and(B) from 5 to 95% by weight of a copolymer composed of(B.sub.1) from 50 to 99.9% by weight of a styrene of the general formula I ##STR1## where R.sup.1 is alkyl or 1 to 4 carbon atoms or hydrogen, R.sup.2 is alkyl of 1 to 6 carbon atoms or halogen and m is 0, 1, 2 or 3,(B.sub.2) from 0.1 to 30% by weight of a monomer containing epoxide groups (II) ##STR2## or of a monomer containing lactam groups (III) ##STR3## or of a monomer containing halobenzyl groups (IV) ##STR4## where R.sup.3 is a divalent, branched or straight-chain alkyl group of 2 to 15 carbon atoms, R.sup.4 is alkyl of not more than 6 carbon atoms, X is halogen, n is 1, 2 or 3 and r is 0, 1, 2 or 3, and(B.sub.3) from 0 to 48% by weight of further comonomers.

    摘要翻译: 热塑性成型材料含有(A)5至95重量%的尼龙和(B)5至95重量%的由(B1)50-99.9重量%的通式 (I)其中R1是烷基或1-4个碳原子或氢,R2是1至6个碳原子的烷基或卤素,m是0,1,2或3,(B2)0.1-30% (II)或含有内酰胺基团(III)的单体(III)或含有卤代苄基(IV)的单体的单体(Ⅳ)其中 R3是2至15个碳原子的二价,支链或直链烷基,R4是不大于6个碳原子的烷基,X是卤素,n是1,2或3,r是0,1,2或 3和(B3)0至48重量%的另外的共聚单体。

    Thermoplastic molding materials
    37.
    发明授权
    Thermoplastic molding materials 失效
    热塑性成型材料

    公开(公告)号:US4433102A

    公开(公告)日:1984-02-21

    申请号:US399208

    申请日:1982-07-19

    IPC分类号: C08L25/12 C08L51/00

    CPC分类号: C08L25/12 C08L51/003

    摘要: A thermoplastic molding material contains 50-90% by weight of a hard component A comprising one or more copolymers of styrene and/or .alpha.-methylstyrene with acrylonitrile, and 50-10% by weight of a graft copolymer B comprising 40-80% by weight of a crosslinked acrylate polymer which has a mean particle size greater than 0.8 .mu.m (d.sub.50 value of the cumulative mass distribution) and onto which 20-60% by weight of a mixture of styrene and acrylonitrile in a weight ratio of from 88:12 to 65:35 is grafted.The novel molding material is used for the production of moldings.

    摘要翻译: 热塑性成型材料含有50-90重量%的包含苯乙烯和/或α-甲基苯乙烯与丙烯腈的一种或多种共聚物的硬组分A和50-10重量%的接枝共聚物B,其包含40-80% 平均粒度大于0.8μm的交联丙烯酸酯聚合物的重量(累积质量分布的d50值),其中以重量比为88:20的苯乙烯和丙烯腈的混合物的20-60重量% 12至65:35接枝。 该新型成型材料用于生产模制品。

    Preparation of polyphenylene ethers
    38.
    发明授权
    Preparation of polyphenylene ethers 失效
    聚苯醚的制备

    公开(公告)号:US4404359A

    公开(公告)日:1983-09-13

    申请号:US399211

    申请日:1982-07-19

    IPC分类号: C08G65/00 C08G65/38 C08G65/44

    CPC分类号: C08G65/44

    摘要: A process for the preparation of high molecular weight polyphenylene ethers from monohydric phenols which have alkyl substituents in both ortho-positions and may additionally have an alkyl substituent in one meta-position but not in the para-position, by an oxidative coupling reaction, employing oxygen, at from 10.degree. to 25.degree. C., in the presence of a catalyst complex comprising a copper salt and an N-substituted imidazole, in the presence of an aromatic C.sub.8 -C.sub.10 -hydrocarbon solvent.N-Methylimidazole, N-ethylimidazole, N-isopropylimidazole, N-n-butylimidazole, N-cyclohexylimidazole, N-octylimidazole and N-phenylimidazole are preferably used as the imidazole, advantageously in amounts of from 0.5 to 5 percent by weight.

    摘要翻译: 一种从一元酚制备高分子量聚苯醚的方法,其在两个邻位具有烷基取代基,并且可以通过氧化偶联反应另外在一个间位而不是在对位具有烷基取代基,采用 在含有铜盐和N-取代的咪唑的催化剂络合物存在下,在芳族C 8 -C 10 - 烃溶剂存在下,在10〜25℃下进行。 N-甲基咪唑,N-乙基咪唑,N-异丙基咪唑,N-正丁基咪唑,N-环己基咪唑,N-辛基咪唑,N-苯基咪唑优选用作咪唑,有利地为0.5〜5重量%。