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 polyolefin composition comprising: (i) 55 to 95 wt % of a propylene butene random copolymer having an MFR.sub.2 of 1.0 to 20.0 g/10 min, a butene content of 1.5 to 8.0 wt % and prepared using a single site catalyst; and (ii) to 45 wt % of an ethylene based plastomer having a density of 860 to 905 kg/m.sup.3, an MFR.sub.2 of 0.3 to 30 g/10 min and prepared using a single site catalyst.

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.

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

The invention relates to a composition comprising a rubber-modified monovinylaromatic polymer comprising: 70 wt % or more of a monovinylaromatic polymer matrix, from 2 to 12 wt % of at least one rubber, and from 0.1 to 3.4 wt % of metallocene-catalyzed poly-alpha-olefins (mPAO)
all based on the total weight of the rubber-modified monovinylaromatic polymer, with the mPAO having a kinematic viscosity of at least 950 mm.sup.2/s at 40° C. and at most 2,000 mm.sup.2/s at 40° C. as measured according to ISO 3104. The invention also relates to articles made from such composition and to the process to produce said composition and said articles.

A method for increasing the melt strength of a polyolefin polymer composition is provided. The method includes mixing a first polyolefin composition derived from at least one olefin polymerization catalyst (a) and at least one olefin polymerization catalyst (b) with a second polyolefin composition derived from the at least one olefin polymerization catalyst (b) or from at least one olefin polymerization catalyst (c), and obtaining the polyolefin polymer composition.

Disclosed herein is a composition comprising from 5 to 20 parts by weight per hundred parts by weight rubber (phr) of a propylene-α-olefin-diene (PEDM) terpolymer comprising 1 to 10 wt % diene, 5 to 40 wt % α-olefin, and 15 to 85 wt % propylene, said wt % based on the weight of the PEDM terpolymer; and from 80 to 95 phr of an ethylene-based copolymer comprising ethylene, one or more C.sub.3 to C.sub.12 α-olefins, and, optionally, one or more dienes; wherein the amount of ethylene content of the ethylene-based copolymer (in wt % on the basis of total weight of the ethylene-based copolymer) is greater than the amount of α-olefin content of the PEDM terpolymer (in wt % on the basis of total weight of the PEDM terpolymer).

The present disclosure relates to unsaturated polyolefins and processes for preparing the same. The present disclosure further relates to curable formulations comprising the unsaturated polyolefins that show improved crosslinking.

A polymer composition for use in a hot melt adhesive comprises at least one semierystalline, low molecular weight (LMW) propylene-based polymer; at least one essentially amorphous, high molecular weight (HMW) propylene-based polymer; and at least one essentially amorphous, LMW propylene-based polymer. A hot melt adhesive composition further contains a tackifier, a plasticizer, an antioxidant, and optionally a wax, a filler, a colorant, a UV absorber, another polymer, or combinations thereof. The hot melt adhesive is useful for a variety of industrial applications where bonding of low surface energy substrates is encountered, including disposable nonwoven hygienic articles, labeling and other assembly applications. Particularly preferred applications include nonwoven disposable diaper and feminine sanitary napkin construction, diaper and adult incontinent brief elastic attachment, diaper and napkin core stabilization, diaper backsheet lamination, industrial filter material conversion, and surgical gown and surgical drape assemblies. The composition demonstrates improved peel strength while maintaining very good creep resistance.

The invention relates to a polypropylene composition comprising: (A) a first polypropylene which is a metallocene-catalyzed homopolymer, or a metallocene-catalyzed random copolymer of propylene and of a co-monomer having at most 0.5% by weight of co-monomer content, relative to the total weight of the random copolymer, as determined by .sup.13C NMR analysis; and (B) a second polypropylene which is a metallocene-catalyzed random copolymer of propylene and of a co-monomer;
wherein said polypropylene composition is as defined in claim 1.

The present invention also relates to a process for the preparation of said polypropylene composition. The present invention also relates to an article comprising said polypropylene composition.