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    Process for the in situ blending of polymers
    291.
    发明公开
    Process for the in situ blending of polymers 失效
    聚合物混合方法

    公开(公告)号：EP0369436A3

    公开(公告)日：1991-07-03

    申请号：EP89121160.9

    申请日：1989-11-15

    Applicant: UNION CARBIDE CHEMICALS AND PLASTICS COMPANY INC. (a New York corporation)

    Inventor： Lee, Kiu Hee ,  Samuels, Sari Beth ,  Karol, Frederick John,

    IPC: C08L23/04 ,  C08F297/08

    CPC classification number: C08F297/08 ,  C08F210/16 ,  C08F2/001

    Abstract: A process for the in situ blending of polymers comprising continuously contacting, under polymerization conditions, a mixture of ethylene and at least one alpha-olefin having at least 3 carbon atoms with a catalyst in at least two fluidized bed reactors connected in series, said catalyst comprising:
    (i) a complex consisting essentially of magnesium,titanium, a halogen, and an electron donor; (ii) at least one activator compound for the complex having the formula AlR˝ e X′ f H g wherein X′ is Cl or OR‴; R˝ and R‴ are saturated aliphatic hydrocarbon radicals having 1 to 14 carbon atoms and are alike or different; f is 0 to 1.5; g is 0 or 1; and e + f + g = 3; and (iii) a hydrocarbyl aluminum cocatalyst, the polymerization conditions being such that ethylene copolymer having a high melt index in the range of about 0.1 to about 1000 grams per 10 minutes is formed in at least one reactor and ethylene copolymer having a low melt index in the range of about 0.001 to about 1.0 gram per 10 minutes is formed in at least one other reactor, each copolymer having a density of about 0.860 to about 0.965 gram per cubic centimeter and a melt flow ratio in the range of about 20 to about 70, and being admixed with active catalyst, with the proviso that:
    (a) the misture of copolymer of ethylene and active catalyst formed in one reactor in the series is transferred to the immediately succeeding reactor in the series; (b) in the reactor in which the low melt index copolymer is made:
    (1) the alpha-olefin is present in a ratio of about 0.02 to about 3.5 mole of alpha-olefin per mole of ethylene; and
    (2) hydrogen is optionally present in a ratio of about 0.001 to about 0.5 mole of hydrogen per mole of combined ethylene and alpha-olefin; (c) in the reactor in which the high melt index copolymer is made:
    (1) the alpha-olefin is present in a ratio of about 0.02 to about 3.5 mole of alpha-olefin per mole of ethylene; and
    (2) hydrogen is present in a ratio of about 0.05 to about 3 moles of hydrogen per mole of combined ethylene and alpha-olefin; and (d) additional hydrocarbyl aluminum cocatalyst is introduced into each reactor in the series following the first reactor in an amount sufficient to restore the level of the activity of the catalyst transferred from the preceding reactor in the series to about the initial level of activity in the first reactor.

    Solid feeding of silane crosslinking agents into extruder
    294.
    发明公开
    Solid feeding of silane crosslinking agents into extruder 失效
    Zuführenvon Festsilanvernetzungsmittel在einem挤出机。

    公开(公告)号：EP0426073A2

    公开(公告)日：1991-05-08

    申请号：EP90120711.8

    申请日：1990-10-29

    Applicant: UNION CARBIDE CHEMICALS AND PLASTICS COMPANY, INC.

    Inventor： Furrer, Willy ,  Schombourg, Jacques Jean Francois Joseph

    IPC: C08F255/00 ,  C08F2/02 ,  C08J3/22

    CPC classification number: C08J3/226 ,  C08F255/00 ,  C08J2323/02 ,  C08J2423/00 ,  C08L43/04 ,  C08F230/08

    Abstract: A process for producing a polymer crosslinkable by exposure to moisture in the presence of a hydrolysis/condensation catalyst comprising blending (i) a thermoplastic base polymer, (ii) a solid carrier polymer containing a silane, and (iii) a free radical generator; heating and mixing (i), (ii) and (iii) together at a temperature above the crystalline melting point of said base polymer; optionally, a free-radical generator, hydrolysis/condensation catalyst, and other additives are contained in the solid carrier polymer.

    Abstract translation: 一种制备在水解/缩合催化剂存在下通过暴露于水分可交联的聚合物的方法，包括将（i）热塑性基础聚合物，（ii）含硅烷的固体载体聚合物和（iii）自由基发生剂混合; 在高于所述基础聚合物的结晶熔点的温度下加热和混合（i），（ii）和（iii） 任选地，固体载体聚合物中包含自由基产生剂，水解/缩合催化剂和其它添加剂。

    Tree resistant compositions
    300.
    发明公开
    Tree resistant compositions 失效
    Zenamensetzungen Gegen TeilentladungskanalbildungbroadstandsfähigeZusammensetzungen。

    公开(公告)号：EP0410431A1

    公开(公告)日：1991-01-30

    申请号：EP90114288.5

    申请日：1990-07-25

    Applicant: UNION CARBIDE CHEMICALS AND PLASTICS COMPANY, INC.

    Inventor： Turbett, Robert John ,  Barnabeo, Austin Emidio ,  Marsden, Eric Paul ,  Mendelsohn, Alfred ,  Umpleby, Jeffrey David

    IPC: H01B3/44 ,  C08L23/08

    CPC classification number: H01B3/44 ,  C08L23/0815 ,  C08L43/04 ,  C08L51/06 ,  C08L2203/202 ,  C08L2205/02 ,  C08L2205/03 ,  C08L2312/08 ,  C08L2666/02

    Abstract: A water tree resistant composition comprising:

    (a) a copolymer of at least the two comonomers, ethylene and 4-methyl-1-pentene, said copolymer having a density no greater than about 0.920 gram per cubic centimeter; or
    (b) a copolymer of at least the two comonomers, ethylene and 1-octene, said copolymer having a density no greater than about 0.920 gram per cubic centimeter; or
    (c) the copolymer of (a) or (b) grafted with a hydrolyzable vinyl silane,
    the copolymers of (a) and (b) being produced by contacting the relevant comonomers, under polymerization conditions, with (i) a catalyst system containing a catalyst precursor comprising magnesium, titanium, a halogen, and an electron donor, and a hydrocarbyl aluminum cocatalyst or (ii) a catalyst system containing a catalyst precursor comprising vanadium an electron donor, and a hydrocarbyl aluminum halide; a hydrocarbyl aluminum cocatalyst; and a halogen substituted lower alkane promoter.

    Abstract translation: 一种防水树脂组合物，其包含：（a）至少两种共聚单体的共聚物，乙烯和4-甲基-1-戊烯，所述共聚物的密度不大于约0.920克/立方厘米; 或（b）至少两种共聚单体的共聚物，即乙烯和1-辛烯，所述共聚物的密度不大于约0.920克/立方厘米; 或（c）与可水解的乙烯基硅烷接枝的（a）或（b）的共聚物，（a）和（b）的共聚物通过在聚合条件下使相关共聚单体与（i）催化剂体系 含有包含镁，钛，卤素和电子给体的催化剂前体和烃基铝助催化剂或（ii）含有包含钒的电子给体的催化剂前体和烃基铝卤化物的催化剂体系; 烃基铝助催化剂; 和卤素取代的低级烷烃助催化剂。

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