The invention provides a multimodal propylene butene random copolymer having a melt flow rate (MFR2) of 1.0 to 20.0 g/10 min and a butene content of 1.5 to 8.0 wt %, wherein said copolymer is prepared using a single site catalyst and wherein said copolymer comprises (i) 30 to 70 wt % of a propylene butene copolymer (A) having an MFR2 of 0.5 to 20.0 g/10 min and a butene content of 0.5 to 10.0 wt %; and (ii) 70 to 30 wt % of a propylene butene copolymer (B) having an MFR2 of 0.5 to 20.0 g/10 min and a butene content of 1.0 to 8.0 wt %; wherein copolymers (A) and (B) are different.

The invention provides a multimodal propylene butene random copolymer having a melt flow rate (MFR.sub.2) of 1.0 to 20.0 g/10 min and a butene content of 5.0 to 20.0 wt %, wherein said copolymer is prepared using a single site catalyst and wherein said copolymer comprises: (i) 30 to 70 wt % of a propylene butene copolymer (A) having an MFR.sub.2 of 0.5 to 20.0 g/10 min and a butene content of 2.0 to 10.0 wt %; and (ii) 70 to 30 wt % of a propylene butene copolymer (B) having an MFR.sub.2 of 0.5 to 20.0 g/10 min and a butene content of 4.0 to 20.0 wt %; wherein copolymers (A) and (B) are different.

The present invention relates to polyolefin. More specifically, the present invention relates to polyolefin having excellent dart drop impact strength, and exhibiting improved transparency, and such polyolefin has a density of 0.915 g/cm.sup.3 to 0.930 g/cm.sup.3 measured according to ASTM D1505; a nd has an ethylene sequence inhomogeneity(I) calculated by the following Equation 1 of 1.25 to 1.40, when analyzed by SSA(Successive Self-nucleation and Annealing):

Inhomogeneity (I)=L.sub.w/L.sub.n   [Equation 1] in the Equation 1, L.sub.w is weighted average(unit: nm) of ESL(Ethylene sequence length), and L.sub.n is arithmetic m ean(unit: nm) of ESL(Ethylene sequence length).

Disclosed are metallocene compounds, catalyst compositions comprising at least one metallocene compound, processes for polymerizing olefins, methods for making catalyst compositions, olefin polymers and articles made from olefin polymers. In an aspect, a metallocene compound and catalyst composition are disclosed in which the metallocene contains at least one indenyl ligand, the indenyl ligand containing at least one halogenated substituent, such as a fluorinated substituent. These metallocene compounds and catalyst compositions can produce polyethylene having unexpectedly low levels of short chain branching.

The present disclosure relates to dual catalyst systems and processes for use thereof. The present disclosure further provides a catalyst system that is a combination of at least two hafnium metallocene catalyst compounds. The catalyst systems may be used for olefin polymerization processes. The present disclosure further provides for polymers, which can be formed by processes and catalyst systems of the present disclosure.

This invention relates bisindenyl metallocene catalyst compounds having long (at least 4 carbon atoms) linear alkyl groups substituted at the two position and substituted or unsubstituted aryl groups at the four position and process using such catalyst compounds, particularly in the solution process at higher temperatures.

Methods for the production of heterophasic polymers in gas and slurry phase polymerization processes, and polymer compositions made therefrom, are disclosed herein.

The present invention relates to polyolefin. More specifically, the present invention relate s to polyolefin having excellent dart drop impact strength, and exhibiting improved transparency and satisfying one of the following 1)˜4): 1) when density is 0.9165 g/cm.sup.3 or more and less than 0.9175 g/cm.sup.3, the content of SCB (Short Chain Branch) is 9.5 to 10.5 wt %, 2) when density is 0.9175 g/cm.sup.3 or more and less than 0.9185 g/cm.sup.3, the content of SCB (Short Chain Branch) is 9.0 to 10.0 wt %, 3) when density is 0.9185 g/cm.sup.3 or more and less than 0.9195 g/cm.sup.3, the content of SCB (Short Chain Branch) is 8.5 to 9.5 wt %, 4) when density is 0.9195 g/cm.sup.3 or more and less than 0.9205 g/cm.sup.3, the content of SCB (Short Chain Branch) is 7.5 to 8.5 wt %, wherein the density is measured according to ASTM D1505.

The present invention is directed to a polyolefin composition comprising a blend of a heterophasic polypropylene composition and 5.0 to 30.0 wt % of an ethylene homo- or copolymer, the ethylene homo- or copolymer having a density of at least 941 kg/m.sup.3 and a melt flow rate MFR.sub.21 of 1 to 10 g/10 min. The heterophasic polypropylene composition comprises a propylene homopolymer or a propylene ethylene random copolymer and an elastomeric ethylene propylene rubber, and is characterized by 75.0 to 95.0 wt % of a crystalline fraction having an ethylene content of up to 4.0 wt % and an MFR.sub.2 of 0.1 to 100 g/10 min, and 5.0 to 25.0 wt % of a soluble fraction having an ethylene content of 10.0 to 70.0 wt % and an intrinsic viscosity of 1.0 to 4.0 dl/kg, wherein the crystalline fraction and the soluble fraction are determined in 1,2,4-trichlorobenzene at 40° C.

The present disclosure provides bridged metallocene catalyst compounds comprising —Si—Si— bridges, catalyst systems comprising such compounds, and uses thereof. Catalyst compounds of the present disclosure can be hafnium-containing compounds having one or more cyclopentadiene ligand(s) substituted with one or more silyl neopentyl groups and linked with an Si—Si-containing bridge. In another class of embodiments, the present disclosure is directed to polymerization processes to produce polyolefin polymers from catalyst systems comprising one or more olefin polymerization catalysts, at least one activator, and an optional support.