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    PROCESS FOR THE PREPARATION OF HIGH MOLECULAR WEIGHT HALOGENATED POLYCARBONATE
    1.
    发明申请
    PROCESS FOR THE PREPARATION OF HIGH MOLECULAR WEIGHT HALOGENATED POLYCARBONATE 审中-公开
    制备高分子量重量的聚碳酸酯的方法

    公开(公告)号：WO1993003083A1

    公开(公告)日：1993-02-18

    申请号：PCT/US1992006479

    申请日：1992-08-04

    Applicant: THE DOW CHEMICAL COMPANY

    Inventor： THE DOW CHEMICAL COMPANY ,  MUNJAL, Sarat ,  CUMMINGS, Clark, J. ,  KAO, Che-I

    IPC: C08G64/10

    CPC classification number: C08G64/10 ,  C08G64/20

    Abstract: A process for preparing halogenated polycarbonate wherein the total amount of base, the end pH of the aqueous phase, and the amount of coupling catalyst employed in the reaction are controlled to selected levels. In one embodiment, carbonate oligomers are condensed to form polycarbonate by contacting said oligomers in a tank reactor with an (i) organic solvent; (ii) 50 weight parts per million or less of coupling catalyst, based on the weight of all organic solvent employed in the oligomer formation and condensation steps, including any in which the coupling catalyst may be dissolved; and (iii) an amount of base which, together with the amount of base employed in the oligomer formation step, brings the total moles of base employed in the oligomer formation and condensation steps per mole of dihydroxy compound to the number given by 2 + 4(Y-1) + Q, where Y is the number of moles of carbonate precursor per mole of dihydroxy compound, and Q is about 0.001 to about 0.2. In another embodiment, carbonate oligomers are condensed to form polycarbonate by contacting said oligomers in a tubular reactor with an (i) organic solvent; (ii) 150 weight parts per million or less of coupling catalyst, based on the weight of all organic solvent employed in the oligomer formation and condensation steps, including any in which the coupling catalyst may be dissolved; and (iii) an amount of base which, together with the amount of base employed in the oligomer formation step, brings the total moles of base employed in the oligomer formation and condensation steps per mole of dihydroxy compound to the number given by 2 + 4(Y-1) + Q, where Y is the number of moles of carbonate precursor per mole of dihydroxy compound, and Q is about 0.001 to about 0.5. The process yields a halogenated polycarbonate of desirably high weight molecular weight, for example in excess of 80,000.

    THERMOPLASTIC BLENDS OF ALPHA-OLEFIN/VINYLIDENE AROMATIC MONOMER INTERPOLYMERS WITH AROMATIC POLYETHERS
    2.
    发明公开
    THERMOPLASTIC BLENDS OF ALPHA-OLEFIN/VINYLIDENE AROMATIC MONOMER INTERPOLYMERS WITH AROMATIC POLYETHERS 审中-公开
    APLHA烯烃的热塑塑料混合物/芳烃乙烯基聚合物和INTER芳香聚醚

    公开(公告)号：EP1047727A1

    公开(公告)日：2000-11-02

    申请号：EP99901471.5

    申请日：1999-01-14

    Applicant: THE DOW CHEMICAL COMPANY

    Inventor： CHEUNG, Yunwa, W. ,  GUEST, Martin, J. ,  CHUM, Pak-Wing, S. ,  KAO, Che-I

    IPC: C08L23/08 ,  C08L25/08 ,  C08L71/12

    CPC classification number: C08L23/08 ,  C08L9/00 ,  C08L23/0815 ,  C08L23/0838 ,  C08L25/08 ,  C08L71/12 ,  C08L71/123 ,  C08L2205/02 ,  C08L2666/04 ,  C09J171/12 ,  C08L2666/22 ,  C08L2666/14

    Abstract: The present invention relates to a blend comprising at least one interpolymer produced from polymerizing a monomer mixture comprising from about 5 to about 65 mole percent of (a) at least one vinylidene aromatic monomer, or (b) a combination of at least one vinylidene aromatic monomer and at least one hindered aliphatic vinylidene monomer, and from about 35 to about 95 mole percent of at least one aliphatic alpha-olefin having from about 2 to about 20 carbon atoms; and a composition comprising an aromatic polyether and optionally (a) at least one homopolymer of a vinylidene aromatic monomer, or (b) at least one interpolymer of one or more vinylidene aromatic monomers, or (c) at least one interpolymer of at least one vinylidene aromatic monomer and at least one hindered aliphatic vinylidene monomers, or (d) at least one of (a-c) further comprising an impact modifier, or (e) a combination of any two or more of the aromatic polyether and (a-d). The blend also comprises at least one optional impact modifier and at least one optional processing aid. The blend is useful in the preparation of fabricated articles such as adhesives, films, blow molded articles, and injection molded articles, and is characterized by improved high temperature serviceability.

    PROCESS FOR THE PREPARATION OF HIGH MOLECULAR WEIGHT HALOGENATED POLYCARBONATE
    6.
    发明公开
    PROCESS FOR THE PREPARATION OF HIGH MOLECULAR WEIGHT HALOGENATED POLYCARBONATE 失效
    一种用于制备高分子量的卤化聚碳酸酯的过程。

    公开(公告)号：EP0552352A1

    公开(公告)日：1993-07-28

    申请号：EP92917249.0

    申请日：1992-08-04

    Applicant: THE DOW CHEMICAL COMPANY

    Inventor： MUNJAL, Sarat ,  CUMMINGS, Clark, J. ,  KAO, Che-I

    IPC: C08G64

    CPC classification number: C08G64/10 ,  C08G64/20

    Abstract: Procédé de préparation de polycarbonate halogéné dans lequel la quantité totale de base, le pH final de la phase aqueuse, ainsi que la quantité de catalyseurs de couplage utilisés dans la réaction sont déterminés en fonction de niveaux sélectionnés. Dans un mode de réalisation de l'invention, des oligomères de carbonate sont condensés, afin d'obtenir un polycarbonate en mettant en contact lesdits oligomères dans un réacteur avec (i) un solvant organique; (ii) 50 parties en poids par million ou moins de catalyseur de couplage exprimées sur la base du poids de la totalité du solvant organique utilisé dans la formation de l'oligomère et les étapes de condensation, y compris celui dans lequel le catalyseur de couplage peut se dissoudre; (iii) une quantité de base qui, avec la quantité de base utilisée dans l'étape de formation de l'oligomère, porte la totalité des moles de base utilisés dans la formation de l'oligomère et dans les étapes de condensation par mole de composé dihydroxy au nombre obtenu au moyen de la formule 2 + 4(Y-1) + Q, où Y représente le nombre de moles du précurseur de carbonate par mole de composé dihydroxy et Q est compris entre environ 0,001 et environ 0,2. Dans un autre mode de réalisation de l'invention, les oligomères de carbonate sont condensés afin de former un polycarbonate en mettant en contact lesdits oligomères dans un réacteur tubulaire avec: (i) un solvant organique; (ii) 150 parties en poids par million ou moins de catalyseur de couplage exprimées sur la base du poids de la totalité du solvant organique utilisé dans la formation de l'oligomère et dans les étapes de condensation, y compris celui dans lequel le catalyseur de couplage peut se dissoudre; (iii) une quantité de base qui, avec la quantité de base utilisée dans l'étape de formation de l'oligomère, porte la totalité des moles de base utilisés dans la formation de l'oligomère et dans les étapes de condensation par mole de composé dihydroxy au nombre obtenu par la formule 2 + 4(Y-1) + Q, où Y représente le nombre de moles de

    CROSS-LINKING OF POLYMERS AND FOAMS THEREOF
    8.
    发明公开
    CROSS-LINKING OF POLYMERS AND FOAMS THEREOF 有权
    联网聚合物及其制品所产生的SCHAUMSTOFFE

    公开(公告)号：EP1007591A1

    公开(公告)日：2000-06-14

    申请号：EP98943376.8

    申请日：1998-08-26

    Applicant: THE DOW CHEMICAL COMPANY

    Inventor： CHAUDHARY, Bharat, I. ,  HO, Thoi, H. ,  KARANDE, Seema, V. ,  KAO, Che-I ,  TERBRUEGGEN, Robert H. ,  BABB, David, A. ,  CUMMINS, Clark, H. ,  MULLINS, Michael, J. ,  SILVIS, H., Craig

    IPC: C08K5/43 ,  C08J3/22

    CPC classification number: C08K5/43 ,  C08J3/226 ,  C08J2423/00 ,  C08K5/0025 ,  C08L23/0815 ,  C08L23/16 ,  C08L2203/14 ,  C08L2205/025 ,  C08L2314/06 ,  C08L23/02 ,  C08L2666/04

    Abstract: The invention includes a process comprising (a) forming a polymeric admixture including at least one polyolefin which has been prepared using a single site catalyst and at least a cross-linking amount of at least one poly(sulfonyl azide) cross-linking agent; (b) shaping the resulting admixture; and (c) heating the resulting shaped admixture to a temperature at least the decomposition temperature of the cross-linking agent. The steps take place in any sequence and optionally include substeps. The single site catalyst is preferably a constrained geometry or metallocene catalyst, but optionally another transition metal catalyst which is not a traditional Ziegler Natta Ti/MgC12 catalyst such as a vanadium catalyst. At least one polyolefin is preferably a polyethylene homopolymer; an ethylene copolymer also having at least one alpha olefin comonomer selected from monomers of from 3 to 20 carbon atoms; an elastomeric polymer; an ethylene/alpha olefin/diene terpolymer or interpolymer; a substantially linear ethylene polymer or a combination thereof. At least one polyolefin preferably has a molecular weight distribution less than about 3.5; more preferably all of the polyolefins have that MWD. The polymeric admixture is preferably a blend comprising at least about 5 weight percent of at least one polyolefin made using a single site catalyst and at least one other polymer which differs from the polyolefin by having a different density, a different molecular weight, a different catalyst used in polymerization, a different chemical composition or combination thereof. The invention futher includes all compositions obtainable by the process of the invention as well as all articles formed from these compositions. The articles are preferably thermoformed, compression molded, injection molded, extruded, cast, blow molded, blown, profile extruded, spun, foamed or molded of any composition of the invention. The invention includes a use of any composition of the invention in any process of thermoforming, injection molding, extrusion, casting, blow molding, spinning, blowing, profile extrusion, foaming, compression molding or a combination thereof.

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