62.
    发明专利
    未知

    公开(公告)号:AT272093T

    公开(公告)日:2004-08-15

    申请号:AT01933987

    申请日:2001-05-18

    Abstract: Propylene polymer compositions comprising (percent by weight): A) from 70 to 90% of a random copolymer of propylene with ethylene, containing from 1 to 6% of ethylene, having a content of fraction insoluble in xylene at room temperature (about 23° C.) of not less than 93%; B) from 10% to 30% of a copolymer of propylene with ethylene, containing from 8 to 18% of ethylene; wherein the ratio (B)/C2B of the percent by weight of (B), with respect to the total weight of (A) and (B), to the percent by weight of ethylene in (B), with respect to the total weight of (B), represented in the above formula by C2, is 2.5 or lower.

    PROCEDIMIENTO PARA PREPARAR DEVIRADOS DE 1,4-DIONA SUSTITUTIDOS CON ALQUILIDENO.

    公开(公告)号:MXPA04003166A

    公开(公告)日:2004-07-27

    申请号:MXPA04003166

    申请日:2004-04-02

    Inventor: MORINI GIAMPIERO

    Abstract: Un procedimiento para la preparacion de derivados de 1,4-diona sustituidos con monoalquilideno de formula (1a) o (1b) o una mezcla de (1a) y (1b); en donde: R1, R2 Y R3 son iguales, o diferentes uno de otro, y son atomos de hidrogeno o grupos hidrocarburo de C1-C20; T1 Y T2 iguales, o diferentes uno de otro, son OR4 , R4, NR42, SR4 o PR42; o T1 Y T2 pueden estar fusionados en un atomo de oxigeno o un grupo NR4; el procedimiento comprende la etapa de reaccion de un compuesto de formula (II) con un compuesto de formula (IIIa) y (IIIb) en presencia de al menos un equivalente con respecto al compuesto de formula (IIIa) y (IIIb) de un carbonato de metal M o de un compuesto de formula MT; tal como K2CO3 o KHCO3 .(ver formulas (1a), (1b), (II), (IIIa) y (IIIb).

    64.
    发明专利
    未知

    公开(公告)号:ES2212560T3

    公开(公告)日:2004-07-16

    申请号:ES99924843

    申请日:1999-04-29

    Abstract: The present invention relates to catalyst components for the polymerization of olefins having Mg, Ti, halogen and at least two internal electron donor compounds, said catalyst components characterized by the fact that at least one of the electron donor compounds is selected from ethers containing two or more ether groups which are further characterized by the formation of complexes with anhydrous magnesium dichloride in an amount less than 60 mmoles per 100 g of MgCl2 and by the failure of entering into substitution reactions with TiCl4 or by reacting in that way for less than 50% by moles, and at least another electron donor compound selected from esters of mono or polycarboxylic acids. Said catalyst components are able to produce propylene polymers which, for high values of xylene insolubility, show a broad range of isotacticity.

    The title is not available
    65.
    发明专利

    公开(公告)号:CZ2004140A3

    公开(公告)日:2004-06-16

    申请号:CZ2004140

    申请日:2002-04-08

    Abstract: A polyolefin composition comprising: (A) from 8 to 25% by weight of a crystalline homopolymer or copolymer of propylene: (B) from 75 to 92% by weight of an elastomeric fraction comprising: (1) a first elastomeric copolymer of propylene with from 15 to 32% by weight at least one alpha-olefin of formula H 2 C=CHR, where R is H or a C 2-6 linear or branched alkyl, optionally containing 0.5 to 5% by weight of a diene, said first elastomeric copolymer containing alpha-olefin, and having solubility in xylene at room temperature greater than 50% by weight, the intrinsic viscosity of the xylene soluble fraction ranging from 3.0 to 5.0 dl/g; and (2) a second elastomeric copolymer of propylene with at least one alpha-olefin of formula H 2 C=CHR, where R is H or a C 2-6 linear or branched alkyl, optionally containing 0.5 to 5% by weight of a diene, said second elastomeric copolymer containing more than 32% up to 45% by weight alpha-olefin, and having solubility in xylene at room temperature greater than 80% by weight, the intrinsic viscosity of the xylene soluble fraction ranging from 4.0 to 6.5 dl/g; the (1)/(2) weight ratio ranging from 1:5 to 5:1.

    SOFT POLYOLEFIN COMPOSITIONS
    68.
    发明专利

    公开(公告)号:IL159392D0

    公开(公告)日:2004-06-01

    申请号:IL15939202

    申请日:2002-04-08

    Abstract: A polyolefin composition comprising: (A) from 8 to 25% by weight of a crystalline homopolymer or copolymer of propylene: (B) from 75 to 92% by weight of an elastomeric fraction comprising: (1) a first elastomeric copolymer of propylene with from 15 to 32% by weight at least one alpha-olefin of formula H 2 C=CHR, where R is H or a C 2-6 linear or branched alkyl, optionally containing 0.5 to 5% by weight of a diene, said first elastomeric copolymer containing alpha-olefin, and having solubility in xylene at room temperature greater than 50% by weight, the intrinsic viscosity of the xylene soluble fraction ranging from 3.0 to 5.0 dl/g; and (2) a second elastomeric copolymer of propylene with at least one alpha-olefin of formula H 2 C=CHR, where R is H or a C 2-6 linear or branched alkyl, optionally containing 0.5 to 5% by weight of a diene, said second elastomeric copolymer containing more than 32% up to 45% by weight alpha-olefin, and having solubility in xylene at room temperature greater than 80% by weight, the intrinsic viscosity of the xylene soluble fraction ranging from 4.0 to 6.5 dl/g; the (1)/(2) weight ratio ranging from 1:5 to 5:1.

    69.
    发明专利
    未知

    公开(公告)号:AT266220T

    公开(公告)日:2004-05-15

    申请号:AT98124146

    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.

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