The present invention relates to a propylene polymer composition comprising a long chain branched propylene polymer, wherein said propylene polymer composition has a) a crystallization temperature Tc of less than 115° C., b) a melting temperature Tm of less than 155° C. c) a F30 melt strength of from 5.0 to less than 30.0 cN, and d) a V30 melting extensibility of more than 190 mm/s, a process for producing said propylene polymer composition by reactive modification of a propylene polymer in the presence of a peroxide, an article comprising said propylene polymer composition, the use of said propylene polymer composition for producing an article.

An activator-nucleator formulation comprising an activating effective amount of (A) an alkylaluminum(chloride) compound (compound (A)); and a nucleating effective amount of a compound (B) selected from at least one of compounds (B1) to (B3): (B1) calcium (1R,2S)-cis-cyclohexane-1,2-dicarboxylate (1:1); (B2) calcium stearate (1:2), and (B3) zinc stearate (1:2); wherein the compound (A) is effective for activating a Ziegler-Natta procatalyst to give a Ziegler-Natta catalyst; and wherein the compound (B) is effective for lowering isothermal crystallization peak time period of a semicrystalline polyethylene polymer made in a polymerization process by the Ziegler-Natta catalyst. A method of polymerizing ethylene, and optionally 0, 1, or more alpha-olefin comonomers, in a polymerization process conducted in a polymerization reactor, the method comprising contacting ethylene, and optionally 0, 1, or more alpha-olefin comonomers, with the Ziegler-Natta catalyst system to give a semicrystalline polyethylene polymer. The semicrystalline polyethylene polymer made by the method of polymerizing.

An activator-nucleator formulation comprising an activating effective amount of (A) an alkylaluminum(chloride) compound (compound (A)); and a nucleating effective amount of a compound (B) selected from at least one of compounds (B1) to (B3): (B1) calcium (1R,2S)-cis-cyclohexane-1,2-dicarboxylate (1:1); (B2) calcium stearate (1:2), and (B3) zinc stearate (1:2); wherein the compound (A) is effective for activating a Ziegler-Natta procatalyst to give a Ziegler-Natta catalyst; and wherein the compound (B) is effective for lowering isothermal crystallization peak time period of a semicrystalline polyethylene polymer made in a polymerization process by the Ziegler-Natta catalyst. A method of polymerizing ethylene, and optionally 0, 1, or more alpha-olefin comonomers, in a polymerization process conducted in a polymerization reactor, the method comprising contacting ethylene, and optionally 0, 1, or more alpha-olefin comonomers, with the Ziegler-Natta catalyst system to give a semicrystalline polyethylene polymer. The semicrystalline polyethylene polymer made by the method of polymerizing.

A method of making an attenuated-light-off post-metallocene catalyst, the method comprising combining a faster-light-off catalyst with an effective amount of a kinetics modifier compound of formula (A.sup.1), (B.sup.1), or (C.sup.1): R5-C≡C—R.sup.6 (A.sup.1), (R.sup.5).sub.2C═C═C(R.sup.6).sub.2 (B.sup.1), or (R.sup.5)(R.sup.7)C═C(R.sup.6)(R.sup.7) (C.sup.1) as defined herein under effective reaction conditions to give an attenuated post-metallocene catalyst that exhibits an attenuated light-off monomer uptake profile (relative to that of the faster-light-off catalyst); wherein the faster-light-off catalyst has been made by activating a post-metallocene precatalyst of structural formula (I) as defined herein; and related methods, compositions and uses.

A method of making an attenuated-light-off post-metallocene catalyst, the method comprising combining a faster-light-off catalyst with an effective amount of a kinetics modifier compound of formula (A.sup.1), (B.sup.1), or (C.sup.1): R5-C≡C—R.sup.6 (A.sup.1), (R.sup.5).sub.2C═C═C(R.sup.6).sub.2 (B.sup.1), or (R.sup.5)(R.sup.7)C═C(R.sup.6)(R.sup.7) (C.sup.1) as defined herein under effective reaction conditions to give an attenuated post-metallocene catalyst that exhibits an attenuated light-off monomer uptake profile (relative to that of the faster-light-off catalyst); wherein the faster-light-off catalyst has been made by activating a post-metallocene precatalyst of structural formula (I) as defined herein; and related methods, compositions and uses.

Provided are a film having an excellent balance between heat seal strength and opening strength, a method of producing the film, and a bag obtained by heat-sealing the film. According to the present invention, there is provided a film containing a resin, wherein a resin density of the film is 860 kg/m.sup.3 or more and less than 900 kg/m.sup.3, and on at least one surface of the film, an arithmetic mean height Sa satisfies the following Expression [1]:
0.10 μm≤Sa≤0.50 μm  [1], and a minimum autocorrelation length Sal satisfies the following Expression [2]:
0.2 μm≤Sal≤10.4 μm  [2].

Provided are a film having an excellent balance between heat seal strength and opening strength, a method of producing the film, and a bag obtained by heat-sealing the film. According to the present invention, there is provided a film containing a resin, wherein a resin density of the film is 860 kg/m.sup.3 or more and less than 900 kg/m.sup.3, and on at least one surface of the film, an arithmetic mean height Sa satisfies the following Expression [1]:
0.10 μm≤Sa≤0.50 μm  [1], and a minimum autocorrelation length Sal satisfies the following Expression [2]:
0.2 μm≤Sal≤10.4 μm  [2].

The present disclosure provides catalyst compounds represented by Formula (I): ##STR00001##
where Q is OR.sup.13, SR.sup.13, NR.sup.13R.sup.14, PR.sup.13R.sup.14, or a heterocyclic ring; each R.sup.1-14 is independently hydrogen, C.sub.1-C.sub.40 hydrocarbyl, substituted C.sub.1-C.sub.40 hydrocarbyl, a heteroatom, or a heteroatom-containing group, or multiple R.sup.1-14 are joined together to form a C.sub.4-C.sub.62 cyclic, heterocyclic, or polycyclic ring structure, or combination(s) thereof; each X.sup.1 and X.sup.2 is independently C.sub.1-C.sub.20 hydrocarbyl, substituted C.sub.1-C.sub.20 hydrocarbyl, a heteroatom, or a heteroatom-containing group, or X.sup.1 and X.sup.2 join together to form a C.sub.4-C.sub.62 cyclic, heterocyclic, or polycyclic ring structure; and Y is a hydrocarbyl. The present disclosure also provides catalyst systems including an activator, a support, and a catalyst of the present disclosure. The present disclosure also provides polymerization processes including introducing olefin monomers to a catalyst system. Additionally, the present disclosure provides a polyolefin formed by a catalyst system or method of the present disclosure.

A complex of formula (I): (I′) M is Hf; each X is a sigma ligand; L is a bridge of formula -(ER.sup.8.sub.2).sub.y—; y is 1 or 2; E is C or Si; each R.sup.8 is independently a C.sub.1-C.sub.20-hydrocarbyl, tri(C.sub.1-C.sub.20-alkyl)silyl, C.sub.6-C.sub.20-aryl, C.sub.7-C.sub.20-arylalkyl or C.sub.7-C.sub.20-alkylaryl or L is an alkylene group such as methylene or ethylene; Ar and Ar′ are each independently an aryl or heteroaryl group optionally substituted by 1 to 3 groups R.sup.1 or R.sup.1′ respectively; R.sup.1 and R.sup.1′ are each independently the same or can be different and are a linear or branched C.sub.1-C.sub.6-alkyl group, C.sub.7-20 arylalkyl, C.sub.7-20 alkylaryl group or C.sub.6-20 aryl group with the proviso that if there are four or more R.sup.1 and R.sup.1′ groups present in total, one or more of R.sup.1 and R.sup.1′ is other than tert butyl; R.sup.2 and R.sup.2′ are the same or are different and are a CH.sub.2—R.sup.9 group, with R.sup.9 being H or linear or branched C.sub.1-C.sub.6-alkyl group, C.sub.3-8 cycloalkyl group, C.sub.6-10 aryl group; each R is a —CH.sub.2—, —CHRx- or C(Rx).sub.2- group wherein Rx is C.sub.1-4 alkyl and where m is 2-6; R.sup.5 is a linear or branched C.sub.1-C.sub.6-alkyl group, C.sub.7-20 arylalkyl, C.sub.7-20 alkylaryl group or C.sub.6-C.sub.20-aryl group; R.sup.6 is a C(R.sup.10).sub.3 group, with R.sup.10 being a linear or branched C.sub.1-C.sub.6 alkyl group; and R.sup.6 and R.sup.7′ are the same or are different and are H or a linear or branched C.sub.1-C.sub.6-alkyl group. Invention relates also to a catalyst in solid form comprising (i) a complex of formula (I) and (ii) a cocatalyst of an aluminium compound and (iii) a cocatalyst of a boron compound. ##STR00001##

A complex of formula (I): (I′) M is Hf; each X is a sigma ligand; L is a bridge of formula -(ER.sup.8.sub.2).sub.y—; y is 1 or 2; E is C or Si; each R.sup.8 is independently a C.sub.1-C.sub.20-hydrocarbyl, tri(C.sub.1-C.sub.20-alkyl)silyl, C.sub.6-C.sub.20-aryl, C.sub.7-C.sub.20-arylalkyl or C.sub.7-C.sub.20-alkylaryl or L is an alkylene group such as methylene or ethylene; Ar and Ar′ are each independently an aryl or heteroaryl group optionally substituted by 1 to 3 groups R.sup.1 or R.sup.1′ respectively; R.sup.1 and R.sup.1′ are each independently the same or can be different and are a linear or branched C.sub.1-C.sub.6-alkyl group, C.sub.7-20 arylalkyl, C.sub.7-20 alkylaryl group or C.sub.6-20 aryl group with the proviso that if there are four or more R.sup.1 and R.sup.1′ groups present in total, one or more of R.sup.1 and R.sup.1′ is other than tert butyl; R.sup.2 and R.sup.2′ are the same or are different and are a CH.sub.2—R.sup.9 group, with R.sup.9 being H or linear or branched C.sub.1-C.sub.6-alkyl group, C.sub.3-8 cycloalkyl group, C.sub.6-10 aryl group; each R is a —CH.sub.2—, —CHRx- or C(Rx).sub.2- group wherein Rx is C.sub.1-4 alkyl and where m is 2-6; R.sup.5 is a linear or branched C.sub.1-C.sub.6-alkyl group, C.sub.7-20 arylalkyl, C.sub.7-20 alkylaryl group or C.sub.6-C.sub.20-aryl group; R.sup.6 is a C(R.sup.10).sub.3 group, with R.sup.10 being a linear or branched C.sub.1-C.sub.6 alkyl group; and R.sup.6 and R.sup.7′ are the same or are different and are H or a linear or branched C.sub.1-C.sub.6-alkyl group. Invention relates also to a catalyst in solid form comprising (i) a complex of formula (I) and (ii) a cocatalyst of an aluminium compound and (iii) a cocatalyst of a boron compound. ##STR00001##