277 results about "Plastomer" patented technology

A process for the production of a propylene based polymer, the process comprising the following steps: (a) a first polymerization stage comprising homopolymerizing propylene or copolymerizing propylene and at least one alpha-olefin in the presence of an alpha-olefin polymerization catalyst whereby to produce a polypropylene component; (b) a second polymerization stage comprising copolymerizing ethylene and at least one alpha-olefin in the presence of an alpha-olefin polymerization catalyst whereby to produce an ethylene/alpha-olefin copolymer component; and (c) blending the polymer components produced in steps (a) and (b) whereby to produce a polymer blend, wherein the first and second polymerization stages are effected in separate polymerization reactors connected in parallel. Also provided are polymer compositions comprising: (i) 30 to 97% by weight, based on the total weight of the polymer composition, of a propylene based polymer; and (ii) 3 to 70% by weight, preferably 5 to 20% by weight, based on the total weight of the polymer composition, of an ethylene copolymer plastomer (e.g., an ethylene-propylene plastomer) containing at least 60% by weight ethylene.

The present invention relates to oriented or hot-blown shrink films which may be manufactured from by a number of processes. The oriented films may be manufactured by double bubble, LISIM, tape bubble, trapped bubble or tenter framing processes. The films of the present invention are useful as a shrink film to package and label a variety of products. The films exhibit a high degree of MD shrinkage in a very controlled and consistent manner while providing a number of other positive characteristics such as optical clarity, puncture and abrasion resistance, controlled gauge, and superior web winding and handling characteristics. The shrink control layers of the films of the present invention contain a modifier component selected from plastomers and/or metallocene catalyzed ethylene-propylene copolymers and blends thereof.

A thermoplastic polyolefin (TPO) roofing membrane is made by blending a new polypropylene based elastomer (PBE) or plastomer (PBP) and polyolefin copolymers. The new PBE or PBP offers superior flexibility over conventional polypropylene roofing membranes for easy installation. The new narrow molecular weight distribution and broad crystallinity distribution of the PBE or PBP results in excellent heat welding strength and wide heat welding windows of the said TPO membrane.

Polypropylene composition comprising (a) a high melt strength polypropylene having a melt flow rate MFR 2 (230 °C) of equal or below 15 g/l 0min and a branching index g' of below 1.0, (b) a first heterophasic propylene copolymer comprising €¢ a polypropylene having a melt flow rate MFR 2 (230 °C) in the range of 50 to 500 g/10min and an elastomeric propylene copolymer having a propylene content in the range of 50 to 80 wt.-% and €¢ an intrinsic viscosity (IV) of equal or more than 2.5 dl/g, (c) a second heterophasic propylene copolymer comprising €¢ a random propylene copolymer having a melt flow rate MFR 2 (230 °C) in the range of 1 to 40 g/10min, a branching index g' of 1.0, and a comonomer content of more than 0.5 wt.-%,and €¢ an elastomeric propylene copolymer having a propylene content in the range of 50 to 80 wt.-%, and an intrinsic viscosity (IV) of equal or below 2.4 dl/g, (d) a polyethylene plastomer having an ethylene content of at least 50 wt.-%, and (e) a mineral filler (F).

A composition comprising: (i) at least one low molecular weight polyolefin; (ii) at least one block copolymer obtainable by selectively hydrogenating a block copolymer having terminal polymeric blocks of a vinyl aromatic monomer and a mid-block prepared originally with an olefin and subsequently hydrogenated; (iii) at least one polypropylene; and (iv) at least one plastomer, wherein the plastomer is an ethylene based polymer having a density of 0.86 g/cc to about 0.910 g/cc or a propylene based polymer having a heat of fusion (Hf) of 70 J/g or less.

A method for making ethylene polymers and copolymers is disclosed. The method uses a catalyst system comprising a low level of an aluminum-containing activator, a bridged indenoindolyl transition metal complex, and a treated silica support. The method enables economical preparation of ethylene copolymers having very low density. The silica-supported, bridged complexes incorporate comonomers efficiently and are valuable for a commercial slurry loop process. Use of a bridged indeno[2,1-b]indolyl complex provides exceptionally efficient comonomer incorporation, and gives polymers with a substantial and controlled level of long-chain branching. The method facilitates the production of a wide variety of polyolefins, from HDPE to plastomers.

An elastic nonwoven laminate that contains an elastic film laminated to one or more nonwoven facings is provided. The nonwoven facing contains a conventional polyolefin and can also contain a polyolefin-based plastomer. The laminate is activated by grooving to decouple the nonwoven facing from the elastic film. To reduce fiber-pull out that can result due to activation by grooving, the laminate can be post-bonded at room or elevated temperatures and a specific range of pressures to compact the fibers of the facing and minimize fiber pull-out/fuzziness while not sacrificing the softness, elasticity, and feel of the laminate.

A modified asphalt composition is provided comprising-at least one plastomer, at least one elastomer, at least one crosslinking agent and asphalt. More specifically, a modified asphalt composition is provided comprising an oxidized polyethylene, a styrene-butadiene-styrene block copolymer, sulfur, and asphalt. A hot mix asphalt composition is also provided comprising the modified asphalt composition and aggregate. Processes for producing the modified asphalt composition and the hot mix asphalt composition are also provided as well as articles produced from these inventive compositions.

A laminate film including a first polyolefin heat sealable resin layer and a second core layer including of a blend of 5-15 wt % of a metallocene-catalyzed butene-propylene or ethylene-propylene thermoplastic elastomer or ethylene-propylene plastomer or blends thereof which exhibit an isothermal crystallization temperature of 60° C. or less and 95-85 wt % of a crystalline propylene homopolymer is disclosed. The laminate film may include additional layers such as a third polyolefin resin-containing layer disposed on the side of the core layer opposite the heat sealable layer, a metal layer, or combinations thereof.

The invention relates to an extruder with two screws, a first screw and a second screw each comprising a threaded conical shaft having a first end with a bigger diameter and a second tapered end, said screws being arranged converging towards each other for the extrusion of plastomers, elastomers and viscous liquids in general. According to the invention, said first screw has a corresponding thread with a first portion which is diametrically larger than a corresponding first portion of the thread of the second screw.

A polyolefin multilayer film containing a polyolefinic core layer and a first polyolefin skin layer of a blend, wherein the first polyolefin skin layer does not contain a thermoplastic or natural rubber and provides a cold seal receptive surface for a cold seal adhesive is disclosed. The blend includes an ethylene propylene random copolymer at 50-90 wt. % of the skin layer and metallocene catalyzed plastomer at 10-50% wt. % of the skin layer, a metallocene catalyzed isotactic polypropylene polymer or a butene propylene copolymer that contains from 5 wt % to 22 wt % of butene.

Films containing a sealant layer composition comprising:

• • (1) polyethylene homopolymer, and ethylene/alpha-olefin copolymer, ethylene vinyl acetate copolymer, and ethylene/acrylate copolymer; and
  • (2) elastomer, plastomer, ionomer, and carboxyl-modified polyethylene;

when sealed to another outer film layer comprising at least one member selected from the group consisting of ionomer, ethylene/acid copolymer, ethylene/vinyl acetate copolymer and ethylene/acrylate copolymer, have been discovered to provide a seal strength comparable to an ionomer to ionomer seal.

Polypropylene compositions with enhanced haptics and a process for making the same are disclosed comprising a blend of reactor TPO, and filler. The compositions may further comprise homopolymer polypropylene, random copolymer polypropylene, polyamide 6, ethylene-C_4-8 α-olefin plastomer, plastomer propylene-ethylene copolymer, SEBS triblock thermoplastic elastomer, maleic anhydride grafted PP, anti-scratch additives, antioxidants, UV stabilizers, and colorants. A process is also disclosed for preparing the polypropylene compositions with enhanced haptics.

Adhesives useful for adhering fluoropolymers are provided. The adhesives are a blend of linear low density polyethylene, ethylene polymer plastomer, polyolefin elastomer and modified polyolefin having acid or acid derivative functionality. Composite fluoropolymer/adhesive structures are also provided.

A film that provides a fumigant barrier on a raised crop bed includes a barrier material for restricting the flow of a fluid fumigant, and an elastic polymer material for providing elasticity in the film so that the film can be stretched around the crop bed. The barrier material can be a combination of a polyamide, such as copolyamide 6/66, and an amorphous nylon resin. The elastic polymer can be a plastomer, such as an ethylene based octene plastomer or a polyolefin plastomer. The film can also include a polyethylene resin, such as a linear low density polyethylene, to provide strength to the film. The film can be made utilizing a blown film extrusion process.

An extruded composite adapted for use as a building material includes a core having a base polymer and a filler material in a substantially homogeneous mixture and a polymeric capstock modified with an elastomer and/or a plastomer. To improve adherence of the polymeric capstock to the base polymer, the capstock can include a capstock polymer that is similar or substantially similar the base polymer. Additionally, various additives may be mixed with the capstock material to improve visual aesthetics of the product and performance of the building material, especially over time.

The present invention relates to plasticized polyolefin compositions comprising a polyolefin and a non-functionalized plasticizer; wherein the non-functionalized plasticizer may comprise C₆ to C₂₀₀ paraffins (including branched and normal paraffins) having a pour point of less than −5° C. In one embodiment, the non-functionalized plasticizer is an isoparaffin comprising C₆ to C₂₅ isoparaffins. In another embodiment the non-functionalized plasticizer is a polyalphaolefin comprising C₁₀ to C₁₀₀ n-paraffins. The polyolefin may be a polypropylene homopolymer, copolymer, impact copolymer, or blends thereof, and may include a plastomer. Non-limiting examples of desirable article of manufacture made from compositions of the invention include films, tubes, pipes, sheets, fibers, woven and nonwoven fabrics, automotive components, furniture, sporting equipment, food storage containers, transparent and semi-transparent articles, toys, tubing and pipes, and medical devices.

The invention provides a polynuclear nickel(II) acenaphthenequinonediimine catalyst for synthesizing branched polyethylene, comprising a main catalyst and a co-catalyst, characterized in that: the main catalyst is formed by loading the polynuclear nickel bromide acenaphthenequinonediimine complexes on the MgCl2/AlRm(OEt)[3-m] carrier formed by aluminium trialkyl modified MgCl2-C2H5OH complexes; the co co-catalyst is the AlEt2Cl and the catalyst for synthesizing branched polyethylene by ethane polymerization is formed by the main catalyst and the co-catalyst, and the mol ratio is that: Ni[(n+1)]L[(n)]Br[2(n+1)]:AlEt[2]Cl is 1:100-1000. The advantages of the invention are that: the prepared catalyst only uses general AlEt[2]Cl as co-catalyst without using expensive MAO or boron compounds, and the catalysis for ethylene polymerization is high active, thus the branched high branching degree and low density polyethylene plastomer and lower density elastomer is prepared; the carrier uses the modified MgCl2-C2H5OH complexes, thus the prepared polyethylene product has good form. The catalyst is suitable for being generalized and used in industrial production with notable advantage.