PROCESS FOR THE POLYMERIZATION OF OLEFINS

    公开(公告)号:HU0303960A3

    公开(公告)日:2007-11-28

    申请号:HU0303960

    申请日:2002-12-10

    Abstract: Process for the polymerization of olefins CH 2 -CHR, in which R is hydrogen or a hydrocarbon radical with 1-12 carbon atoms, carried out in the presence of a catalyst component (A) comprising Mg, Ti and halogen as essential elements and of a catalyst component (B) capable to produce, under the same polymerization conditions, a polymer with an average particle size lower than that obtainable with the said catalyst component A. The said process provides polymers with increased bulk density.

    22.
    发明专利
    未知

    公开(公告)号:DE69835626T2

    公开(公告)日:2007-08-16

    申请号:DE69835626

    申请日:1998-12-19

    Abstract: A method for controlling a chemical reactor such as a gas-phase reactor using a non-linear predictive control includes steps for generating a plurality of signals representing a current state of the chemical reactor and reflecting a respective constituent of reactants in the chemical reactor, calculating a future state of the chemical reactor responsive to said plurality of signals and referenced to mass hold-up of the reactants in the chemical reactor, and controlling at least one parameter related to the chemical reactor so as to control the future state of the chemical reactor. Spurious control events due to noise in sensor or controller output signals are preferably minimized by filtering these signals using a N-sign filter subroutine.

    23.
    发明专利
    未知

    公开(公告)号:DE60203926T2

    公开(公告)日:2006-05-04

    申请号:DE60203926

    申请日:2002-10-04

    Abstract: Propylene polymer compositions comprising (by weight): A) from 15% to 60% with C4-C8 alpha-olefin(s), containing more than 10%, but less than 14%, of said C4-C8 alpha-olefins (s); B) from 40% to 85% of a copolymer of propylene with C4-C8 alpha-olefin(s), preferably butene, containing from 14% to 30% of said C4-C8 alpha-olefin(s), and optionally from 0.5% to 3% of ethylene; provided that the total content of C4-C8 alpha-olefin(s) in the propylene polymer composition be higher than 10%.

    24.
    发明专利
    未知

    公开(公告)号:DE69921083T2

    公开(公告)日:2006-03-09

    申请号:DE69921083

    申请日:1999-07-29

    Inventor: NIYOGI G

    Abstract: The thermal oxidative stability of acrylic grafted polymers is improved by (a) graft polymerizing monomers selected from the group consisting of (i) an ester or salt of an unsubstituted or 1-3 C alkyl-substituted acrylic acid and (ii) an ester or salt of an unsubstituted or 1-3 C alkyl-substituted acrylic acid and about 1 to about 10 mole %, based on the total monomers added, of an unsubstituted or 1-3 C alkyl-substituted acrylic acid, to a backbone of a propylene polymer material in the presence of a 4-vinyl-substituted 5-12 C cyclic 1-alkene, wherein the total amount of polymerized monomer is about 20 to about 200 parts per hundred parts of the propylene polymer material and the vinyl-substituted cyclic alkene is present in an amount of about 1 mole % to about 30 mole %, based on the total moles of monomer added, and (b) removing any unreacted grafting monomer from the resulting grafted propylene polymer material, decomposing any unreacted initiator, and deactivating any residual free radicals in the material, wherein steps (a) and (b) are carried out in a substantially non-oxidizing environment.

    27.
    发明专利
    未知

    公开(公告)号:BR0316708A

    公开(公告)日:2005-10-25

    申请号:BR0316708

    申请日:2003-11-25

    Abstract: A compatible blend of an engineering thermoplastic such as a polyamide and an olefin polymer material is prepared by (1) making an oxidized olefin polymer material containing carboxylic acid groups or derivatives thereof, (2) extruding a mixture of (a) the oxidized olefin polymer material from step (1), (b) an engineering thermoplastic, (c) optionally, an inorganic base, and (d) optionally, a non-oxidized olefin polymer material, and (3) recovering a blend of the engineering thermoplastic, the oxidized olefin polymer material or an ionomer thereof, which acts as a compatibilizer, and, optionally, the non-oxidized olefin polymer material. The oxidized olefin polymer material can be made by treating the olefin polymer material with an organic peroxide initiator while adding a controlled amount of oxygen.

    COMPOSICIONES DE POLIOLEFINAS RESISTENTES AL IMPACTO

    公开(公告)号:AR043961A1

    公开(公告)日:2005-08-17

    申请号:ARP040101122

    申请日:2004-04-02

    Abstract: Composición de polímeros de olefina que comprende (del peso, salvo especificación contraria): A) entre 60 y 95 % de un homopolímero o copolímero de propileno que tiene un valor de índice de polidispesidad (I.P.) que oscila entre 4,6 y 10 y un contenido de pentadas isotácticas (mmmm), medido por 13CNMR en la fracción insoluble en xileno a 25° C, superior al 98 % molar; B) entre 4 y 40 % de un copolímero de etileno que contiene entre 40 % y 70 % de propileno o alfa-olefina(s) C4-10 o de combinaciones de los mismos, y opcionalmente menores proporciones de un dieno; dicha composición tiene un perfil de fraccionamiento por elución con incremento de temperatura (sigla en inglés "TREF"), obtenido por fraccionamiento en xileno y recolección de las fracciones a temperaturas de 40° C, 80° C y 90° C, donde el contenido de etileno Y de la fracción recolectada a 90° C satisface la siguiente relación (I): Y =

    MEZCLA MADRE DE POLIOLEFINA Y COMPOSICION ADECUADA PARA EL MOLDEADO POR INYECCION

    公开(公告)号:AR043814A1

    公开(公告)日:2005-08-17

    申请号:ARP040101091

    申请日:2004-04-01

    Abstract: Una composición de mezcla madre que comprende (porcentaje del peso): A) entre 50% y 90% de un componente de polipropileno cristalino que comprende: AI) entre 25% y 75% de una fracción que tiene un índice de fluidez MFR1 que oscila entre 0,1 y 10g/10min; y AII) entre 75% y 25% de una fracción que tiene un índice de fluidez MFR2 igual o inferior a 100 g/10min; donde la relación MFR1/MFR2 oscila entre 5 y 60; y B) entre 10% y 50% de un componente de copolímero de etileno y al menos una alfa-olefina C3-10, que contiene entre 1s5% y 50% de etileno; dicha composición de mezcla madre que tiene un valor de viscosidad intrínseca [h] de la fracción soluble en xileno a temperatura ambiente igual o superior a 3,5 dl/g, se agrega a los materiales de poliolefinas para obtener composiciones finales adecuadas para el moldeado por inyección.

    BIORIENTED POLYPROPYLENE FILMS
    30.
    发明专利

    公开(公告)号:HU0204525A3

    公开(公告)日:2005-07-28

    申请号:HU0204525

    申请日:2001-12-13

    Abstract: Biaxially oriented polypropylene films (BOPP) having at least one layer of a propylene polymer containing at least 0.8% by weight of ethylene and, optionally, one or more C 4 -C 10 alpha-olefins, or a propylene polymer composition containing at least 0.8% by weight of one or more comonomers selected from the group consisting of ethylene and C 4 -C 10 alpha-olefins, and ha

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