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1134 条记录 (耗时 0.015 秒)

    Aromatic polymers containing ketone linking groups and process for their preparation
    81.
    发明授权
    Aromatic polymers containing ketone linking groups and process for their preparation 失效
    含有酮连接基团的芳族聚合物及其制备方法

    公开(公告)号：US3928295A

    公开(公告)日：1975-12-23

    申请号：US46779874

    申请日：1974-05-07

    申请人： ICI LTD

    发明人： ROSE JOHN BREWSTER

    IPC分类号： B29C55/00 ,  B29B7/00 ,  B29C47/00 ,  B29C49/00 ,  B29C55/02 ,  C08G65/00 ,  C08G65/40 ,  C08G2/00 ,  C08G75/20

    CPC分类号： C08G65/4012 ,  C08G65/4093

    摘要： A process for the preparation of aromatic polyketones and copolyketone/sulphones (ketone to sulphone content 75/25 to 100/0 having high molecular weight comprises heating dialkali metal salt of a bisphenol containing ketone linking groups with equimolar or slight molar excess of dihalobenzenoid compound having halogen atoms activated by a ketone or sulphone linking group in the presence of certain diaryl sulphones at 250* to 400*C.

    摘要翻译： 制备芳族聚酮和共聚酮/砜（酮至具有高分子量的75/25至100/0的酮的酮的方法包括加热含有双酚的酮的二价金属盐，连接基团具有等摩尔或轻微摩尔过量的二卤代苯甲醛化合物，其具有 在某些二芳基砜存在下，在250-400℃下由酮或砜连接基团活化的卤素原子。

    Method of stabilizing oxymethylene copolymers
    82.
    发明授权
    Method of stabilizing oxymethylene copolymers 失效
    稳定聚甲基苯乙烯共聚物的方法

    公开(公告)号：US3880804A

    公开(公告)日：1975-04-29

    申请号：US49028074

    申请日：1974-07-22

    申请人： UBE INDUSTRIES

    发明人： ISHII TAKAMI ,  SUZUKI TARO ,  TAKIKAWA NAOHISA ,  KITAMURA SUNAO ,  WAKABAYASHI TADAMASA ,  KUMAHARA HIROMI

    IPC分类号： C08G2/00 ,  C08G2/18 ,  C08G2/36 ,  C08G51/58

    CPC分类号： C08G2/36

    摘要： A method of stabilizing oxymethylene copolymers which comprises heating an oxymethylene copolymer at a temperature of from about 100* to about 170*C. in an aqueous medium in the presence of a salt selected from the group consisting of sodium and potassium salts of ethylenediamine-tetraacetic acid under the conditions of a pH value of from about 4 to about 7.

    摘要翻译： 一种稳定甲醛共聚物的方法，其包括在水介质中，在选自乙二胺四乙酸钠和钾盐的盐存在下，在约100至约170℃的温度下加热甲醛共聚物 酸在约4至约7的pH值条件下进行。

    Process for producing homo-and copolymers of cyclic acetals
    83.
    发明授权
    Process for producing homo-and copolymers of cyclic acetals 失效
    生产循环乙醇的共聚物的方法

    公开(公告)号：US3848020A

    公开(公告)日：1974-11-12

    申请号：US28155972

    申请日：1972-08-17

    申请人： HOECHST AG

    发明人： BURG K ,  SCHLAF H

    IPC分类号： C08G2/00 ,  C08G2/06 ,  C08G4/00 ,  C08G1/04 ,  C08G1/20

    CPC分类号： C08G4/00 ,  C08G2/10

    摘要： 1. IN A PROCESS FOR PRODUCING MOLDABLE HOMOPOLYMERS OF TRIOXANE OR COPOLYMERS COMPRISING A MAJOR AMOUNT OF UNITS DERIVED FROM TRIOXANE AND A MINOR AMOUNT OF UNITS DERIVED FROM A LINEAR ACETAL OF AN A,W-DIOL OR A CYCLIC ACETAL OF THE FORMULA

    O
    WHEREIN R1, R2, R3 AND R4 MAY BE THE SAME OR DIFFERENT REPRESENT HYDROGEN OR AN ALKYL GROUP WHICH CAN BE HALOGEN-SUBSTITUTED, R5 REPRESENTS AN OXYMETHYLENE RADICAL WHICH CAN BE SUBSTITUTED BY AN ALKYL OR HALOGEN-SUBSTITUTED ALKYL GROUP, AND N IS 1 TO 3, OR WHEN N IS 1, R5 CAN BE THE RADICAL -(O-CH2CH2)M-OCH2- WHEREIN M IS 1 TO 3, AT A TEMPERATURE BETWEEN THE MELTING POINT AND BOILING POINT OF THE MONOMER OR MONOMER MIXTURE IN THE PRESENCE OF A PROTONIC ACID, THE IMPROVEMENT WHICH CONSISTS IN USING AN ANHYDROUS PERFLUOROALKYL SULFONIC ACID WITH 1 TO 18 CARBON ATOMS AS THE PROTONIC ACID.

    Method for polymerizing formaldehyde
    84.
    发明授权
    Method for polymerizing formaldehyde 失效
    聚甲醛的方法

    公开(公告)号：US3804808A

    公开(公告)日：1974-04-16

    申请号：US25674272

    申请日：1972-05-25

    申请人： UBE INDUSTRIES

    发明人： ISHII T ,  INUIZAWA Y ,  KUMAHARA H

    IPC分类号： C08G2/00 ,  C08G2/06 ,  C08G1/02

    CPC分类号： C08G2/08

    摘要： IMPROVED METHOD FOR POLYMERIZING FORMALDEHYDE IN THE PRESENCE OF A METAL CHELATE COMPOUND AS CATALYST IS DESCRIBED; FORMALDEHYDE IS POLYMERIZED IN A SOLUTION OF BIS(3-PHENYLACETYLACETONE) COPPER DISSOLVED IN AN INERT ORGANIC SOLVENT AT THE CONCENTRATION OF 1X10**9 TO 5X10**7 MOLE PER LITER OF THE SOLVENT UNTIL THE CONCENTRATION OF POLYMER IN THE RESULTING SLURRY REACHES THE RANGE OF 30 TO 150 G./I.

    Process for the preparation of polyhaloorgano hypochlorites
    85.
    发明授权
    Process for the preparation of polyhaloorgano hypochlorites 失效
    制备聚氧乙烯高氯酸盐的方法

    公开(公告)号：US3769312A

    公开(公告)日：1973-10-30

    申请号：US3769312D

    申请日：1968-06-05

    申请人： ALLIED CHEM

    发明人： GOULD D ,  ANDERSON L ,  FOX W

    IPC分类号： C01B17/45 ,  C01B17/46 ,  C08G2/00 ,  C11D3/395 ,  D06L3/06 ,  C07C71/00

    CPC分类号： C11D3/3955 ,  C07C71/00 ,  D06L4/27

    摘要： POLYHALOORGANO HYPOCHLORITES OF THE FORMULA:

    R-(OCI)N

    WHEREIN N IS 1 OR 2, R IS AN OPEN CHAIN YZ-PERHALOALKYL GROUP WHEN N IS 1 AND AN OPEN CHAIN YZ-PERHALOZLKYLENE GROUP WHEN N IS 2, WHEREIN Y AND Z ARE SUBSTITUENTS ON THE R MOIETY AND MAY BE THE SAME OR DIFFERENT AND SELECTED FROM ELECTRONEGATIVE GROUPS UNREACTIVE TO THE -OCI GROUP OR GROUPS, WITH THE PROVISO THAT WHEN N IS 2 THE R GROUP CONTAINS AT LEAST THREE CARBON ATOMS AND IN SUCH A CASE THE CARBON ATOM OR ATOMS ATTACHED TO THE -OCI GROUP OR GROUPS ARE EACH BONDED TO NO MORE THAN TWO OTHER CARBON ATOMS; MAY BE PREPARED BY REACTING CERTAIN COMPOUNDS CONTAINING CARBON-OXYGEN BONDS WITH AN INORGANIC REAGENT CONTAINING A CHLORINE ATOM IN A PLUS 1 OXIDATION STATE WHICH CHLORINE ATOM IS ATTACHED TO A MORE ELECTRONEGATIVE ELEMENT. THESE NOVEL POLYHALOORGANO HYPOCHLORITES ARE USEFUL AS POLYMERIZATION INITIATORS AND ARE VALUABLE INTERMEDIATES FOR THE SYNTHESIS OF OTHER USEFUL COMPOUNDS.

    摘要翻译： 五氟硫酸次氯酸盐，SF5OCl，其通过使亚硫酰四氟化物，SOF 4或其盐与含有氯原子的无机试剂以+ 1氧化态反应制备，氯原子与更多的电负性元素连接。 当使用SOF 4时，需要使用选自LiF，NaF，KF，RbF和CsF的反应催化剂。 五氟硫酸次氯酸盐可用作聚合引发剂，并且是合成其它有用化合物的有价值的中间体。