Abstract: Claimed are metallocene-complexes of formula (I) [formula (I?)] wherein M is Hf or Zr, L is a bridge comprising 1-2 C- or Si-atoms, The other variables are as defined in the claims.

Abstract: The present invention provides a heterophasic polypropylene composition with good response to nucleating agents, increased crystallisation temperature, good mechanical properties The present invention further relates to articles made thereof, and the use of the heterophasic polypropylene composition for specific applications and producing these.

Abstract: A heterophasic propylene ethylene copolymer composition having an MFR2 in the range from 1.0 to 55.0 g/10 min and a melting temperature in the range from 155 to 162° C., comprising: i) from 60 to 88 wt.-% of a xylene cold insoluble fraction (XCI) having an intrinsic viscosity iV(XCI) in the range from 1.40 to 2.50 dl/g, an isotactic pentad concentration [mmmm] of more than 97.0% and a content of 2,1-regiodefects in the range from 0.1 to 0.4 mol %, ii) from 12 to 40 wt.-% of a xylene cold soluble fraction (XCS) having an intrinsic viscosity iV(XCS) in the range from 1.80 to 3.20 dl/g and an ethylene content C2(XCS) in the range from 25 to 80 wt.-%, wherein the ratio of the intrinsic viscosities of the two fractions, iV(XCS)/iV(XCI), is in the range from 1.0 to 2.0.

Abstract: Claimed are metallocene-complexes of formula (I) [formula (I?)] wherein M is Hf or Zr, L is a bridge comprising 1-2 C- or Si-atoms, The other variables are as defined in the claims.

Abstract: The invention is directed to a beta nucleated heterophasic propylene copolymer composition (HPPC).

Abstract: New, improved silica supported catalyst system, which comprises a specific class of metallocene complexes in combination with a boron containing cocatalyst and an aluminoxane cocatalyst, its use for producing propylene homopolymers, propylene copolymers, especially with ethylene, as well as heterophasic propylene copolymers, preferably in a multistep process including a gas phase polymerization step.

Abstract: The present invention relates to a process for producing a copolymer of propylene, optionally ethylene, and at least one comonomer selected from alpha olefins having from 4 to 12 carbon atoms using a specific class of metallocene complexes in combination with a cocatalyst system comprising a boron containing cocatalyst and an aluminoxane cocatalyst, preferably in a multistage polymerization process including a gas phase polymerization step.

Abstract: The present invention relates to nucleated propylene-butylene copolymers comprising propylene and butylene monomer units, wherein the nucleated propylene-butylene copolymer has improved stiffness, better impact behaviour and optical properties such as low haze and improved optomechanical ability.

Abstract: A propylene copolymer composition comprising A) a propylene butylene copolymer which is —free of phthalicacid esters as well as decomposition products thereof; —obtained by a Ziegler-Natta catalyst and B) at least one ?-nucleating agent, the propylene copolymer composition having —a MFR (2.16 kg/210° C.) in the range of 2 to 100 g/10 min —a melting point Tm(1) of less than 140° C. —a melting point Tm(2) of at least 150° C., said Tm(2) being associated with more than 75% of the total melting enthalpy and whereby the propylene copolymer —has monomer units derived from a) propylenein an amount of 90.0-98.0 mol.-% b) butylenein an amount of 2.0-10.0 mol.-% with respect to the total weight of the propylene butylene copolymer —an isotacticity mm % as determined by 13C NiNMR spectroscopy of below 99.0%; and —a Koenig-B parameter with respect to butylene as determined by 13C NMR spectroscopy of more than 0.98.

Abstract: The present invention relates to nucleated propylene-butylene copolymers comprising propylene and butylene monomer units, wherein the nucleated propylene-butylene copolymer has improved stiffness, better impact behaviour and optical properties such as low haze and improved optomechanical ability.

Abstract: A process for the preparation of a heterophasic copolymer of propylene and ethylene comprising polymerizing propylene and ethylene in the gas phase in the presence of a solid particulate catalyst free from an external carrier comprising: (i) a symmetrical complex of formula (I), wherein M is zirconium or hafnium; each X is a sigma ligand; L is a divalent bridge selected from —R?2C—, —R?2C—CR?2-, —R?2Si—, —R?2Si—SiR?2—, —R?2Ge—, wherein each R? is independently a hydrogen atom, C1-C20-alkyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl; R2 is a C1-C20 hydrocarbyl radical; R5 is a C1-C20 hydrocarbyl radical; R6 is a tertiary C4-C20 hydrocarbyl radical; R7 is a hydrogen atom or a C1-10-hydrocarbyl radical; n is 0 to 3; R1 is a C1-C20 hydrocarbyl radical and optionally two adjacent R1 groups taken together can form a further mono or multicyclic ring condensed to Ph ring optionally substituted by one or two groups R4; and R4 is a C1-C10 alkyl radical and (ii) a cocatalyst, preferably c

Abstract: A process for the preparation of a propylene polymer in a multistage polymerisation process in the presence of a single site catalyst, said process comprising: (I) in a prepolymerisation step prepolymerising a single site catalyst in the presence of propylene and optionally at least one C2-10 alpha olefin comonomer and in the presence of hydrogen or in the absence of hydrogen; (II) in a slurry polymerisation step, polymerising propylene and optionally at least one C2-10 alpha olefin comonomer, with the pre-polymerised catalyst of step (I) in the presence of hydrogen; and subsequently (III) in a gas polymerisation step polymerising propylene and optionally at least one C2-10 alpha olefin comonomer, in the presence of catalyst and polymer from step (II) and optionally in the presence of hydrogen so as to form a propylene homopolymer or copolymer; wherein the amount of hydrogen fed to the pre-polymerisation step (I) is at most 15% of the total amount of hydrogen fed to steps (I) and (II) of the polymerisation pr

Abstract: The present invention relates to an olefin polymerization process, wherein propylene and 1-butene and optionally ethylene are reacted in the presence of a Ziegler-Natta catalyst system so as to obtain a polypropylene, wherein the polypropylene comprises 1-butene-derived comonomer units in an amount of from 5 to 20 wt % and optionally ethylene-derived comonomer units in an amount of up to 3 wt %, and the Ziegler-Natta catalyst system comprises an external donor of the following formula (I): (R3)z(R2O)ySi(R1)x.

Abstract: The present invention relates to an olefin polymerization process, wherein propylene and a C4 to C10 ?-olefin monomer, preferably 1-butene- and optionally ethylene are reacted in the presence of a Ziegler-Natta catalyst so as to obtain a polypropylene, wherein the polypropylene comprises C4 to C10 ?-olefin, preferably 1-butene-derived comonomer units in an amount of from 0,5 to 15 wt % and ethylene-derived comonomer units in an amount of 0 to 3 wt %, and wherein the Ziegler-Natta catalyst comprises i) an external donor of the formula (I): (R3)z(R2O)ySi(R1)x, and ii) a solid catalyst component being free of external carrier material.

Abstract: A process for the preparation of a copolymer of propylene and ethylene comprising polymerizing propylene and ethylene in the gas phase in the presence of a solid particulate catalyst free from an external carrier comprising: (i) a symmetrical complex of formula (I), wherein M is zirconium or hafnium; each X is a sigma ligand; L is a divalent bridge selected from —R?2C—, —R?2C—CR?2—, —R?2Si—, —R?2Si—SiR?2—, —R?2Ge—, wherein each R? is independently a hydrogen atom, C1-C20-alkyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl; R2 is a C1-C20 hydrocarbyl radical; m is 2 to 5; R9 is a H or C1-C20 hydrocarbyl radical; R7 is a hydrogen atom or a C1-10 hydrocarbyl radical; n is 0 to 3; R1 is a C1-C20 hydrocarbyl radical and optionally two adjacent R1 groups taken together can form a further mono or multicyclic ring condensed to Ph ring optionally substituted by one or two groups R4; and R4 is a C1-C10 alkyl radical; and (ii) a cocatalyst, preferably comprising an organometallic compound of

Abstract: A process for the preparation of a copolymer of propylene and ethylene comprising polymerising propylene and ethylene in the gas phase in the presence of a solid particulate catalyst free from an external carrier comprising: (i) a symmetrical complex of formula (I), wherein M is zirconium or hafnium; each X is a sigma ligand; L is a divalent bridge selected from —R?2C—, —R?2C—CR?2—, —R?2Si—, —R?2Si—SiR?2—, —R?2Ge—, wherein each R? is independently a hydrogen atom, C1-C20-alkyi, tri(C1-C20-aikyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl; R2 is a C1-C20 hydrocarbyl radical; m is 2 to 5; R9 is a H or C1-C20 hydrocarbyl radical; R7 is a hydrogen atom or a C1-10-hydrocarbyl radical; n is 0 to 3; R1 is a C1-C20 hydrocarbyl radical and optionally two adjacent R1 groups taken together can form a further mono or multicyclic ring condensed to Ph ring optionally substituted by one or two groups R4; and R4 is a C1-C10 alkyl radical; and (ii) a cocatalyst, preferably comprising an organometallic compound of

Abstract: A process for the preparation of a hetero-phasic copolymer of propylene and ethylene comprising polymerising propylene and ethylene in the gas phase in the presence of a solid particulate catalyst free from an external carrier comprising: (i) a symmetrical complex of formula (I), wherein M is zirconium or hafnium; each X is a sigma lig- and; L is a divalent bridge selected from —R?2C—, —R?2C—CR?2-, —R?2Si—, —R?2Si—SiR?2—, —R?2Ge—, wherein each R? is independently a hydrogen atom, C1-C20-alkyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl; R2 is a C1-C20 hydrocarbyl radical; R5 is a C1-C20 hydrocarbyl radical; R6 is a tertiary C4-C20 hydrocarbyl radical; R7 is a hydrogen atom or a C1-10-hydrocarbyl radical; n is 0 to 3; R1 is a C1-C20 hydrocarbyl radical and optionally two adjacent R1 groups taken together can form a further mono or multi-cyclic ring condensed to Ph ring optionally substituted by one or two groups R4; and R4 is a C1-C10 alkyl radical and (ii) a cocatalyst, preferab

Abstract: A process for the preparation of a propylene copolymer, preferably a heterophasic propylene copolymer, in a multistage polymerisation process in the presence of a single site catalyst, said process comprising: (I) in a slurry polymerisation step, polymerising propylene and optionally at least one C2-10 alpha olefin comonomer; and subsequently (II) in a gas polymerisation step polymerising propylene and optionally at least one C2-10 alpha olefin comonomer, in the presence of catalyst and polymer from step (I); (III) in a second gas polymerisation step, polymerising propylene and at least one C2-10 alpha olefin comonomer in the presence of the catalyst and polymer from step (II); wherein said catalyst comprises (i) a metallocene complex of a group (IV) metal, said metallocene comprising at least two cyclopentadienyl type ligands; (ii) a boron based cocatalyst; and (iii) an aluminoxane cocatalyst; said catalyst being in solid form, preferably in solid particulate form, and being free from an external carrier.

Abstract: Polypropylene composition comprising comonomer units derived from ethylene in an amount of from 9.0 to 52.0 mol-% and comonomer units derived from a higher a-olefin in an amount of from 0.4 to 3.0 mol-%, wherein said polypropylene composition has an amount of xylene cold solubles of at least 30 wt.-%, wherein further the xylene cold soluble fraction has an ethylene content of from 20.0 to 80.0 mol-% and a higher a-olefin content from 0.1 to 1.5 mol-%.

Abstract: The present invention relates to an olefm polymerization process, wherein propylene and 1-butene and optionally ethylene are reacted in the presence of a Ziegler-Natta catalyst system so as to obtain a polypropylene, wherein the polypropylene comprises 1-butene-derived comonomer units in an amount of from 5 to 20 wt % and optionally ethylene-derived comonomer units in an amount of up to 3 wt %, and the Ziegler-Natta catalyst system comprises an external donor of the following formula (I): (R3)z(R2O)ySi(R1)x.