Dow Global Technolgoies LLC

Pbbpolisur S.r.l.

Davidson Lütkenhaus

Jorge Caminero Gomes

Nicolas Cardoso Mazzola

Mehmet Demirors

Teresa Plumley Karjala

Guillermo A Raimondi

Surya Ssubramaniam

Marcela E Laporta

Felipe D Barbosa

Marie De Luján Tricotti

Felipe Dantas Barbosa

Embodiments of polyethylene formulations and articles comprising polyethylene formulations are disclosed. The polyethylene formulation may include from 45 wt. % to 90 wt. % of an MDPE having a density of from 0.930 g/cc to 0.950 g/cc and a melt index (I) from 0.05 g/10 min to 0.5 g/10 min; from 10 wt. % to 50 wt. % of a polyethylene composition having a density from 0.910 g/cc to 0.936 g/cc and a melt index (I) from 0.7 g/10 min to 1.0 g/10 min; and from 0.5 wt. % to 5% of a masterbatch composition. The polyethylene composition may comprise a first polyethylene fraction area in a temperature range of 45° C. to 87° C. of an elution profile via improved comonomer composition distribution (iCCD) analysis method and a second polyethylene fraction area in a temperature range of 95° C. to 120° C. of an elution profile via iCCD.

Polymer formulations and irrigation tubing including polymer formulations

Embodiments of the present disclosure are directed to multilayer structures. The multilayer structures may include a first layer and a barrier layer. The first layer may include, based on the total weight of the first layer, from 90 wt. % to 99.5 wt. % of an ethylene/alpha-olefin interpolymer having a density of from 0.945 g/cc to 0.970 g/cc and from 0.5 wt. % to 10 wt. % of a compatibilizer. The compatibilizer may include an anhydride and/or carboxylic acid functionalized ethylene/alpha-olefin elastomer having a density of from 0.850 g/cc to 0.910 g/cc and a melt viscosity of greater than 200,000 cP, when measured at 177 C.

Multilayer structures having improved recyclability

Provided is a method for increasing the melt strength and/or low shear viscosity of a polyethylene resin. The method includes: a) providing a polyethylene composition including the reaction product of ethylene and optionally, one or more alpha-olefin comonomers, wherein the polyethylene composition is characterized by the following properties: a density ranging from 0.900 g/cmto 0.970 g/cm, a molecular weight distribution (Mw/Mn) ranging from 2.6 to 3.5, and from 0.10 to 0.27 vinyl groups per 1,000 total carbon atoms; b) providing a masterbatch composition including a free radical generator and a polyethylene resin, wherein the free radical generator has a half-life at 220&#xb0; C. of less than 200 seconds, and a decomposition energy higher than &#x2212;250 kJ/mol, and wherein the polyethylene resin has a density ranging from 0.900 g/cmto 0.970 g/cm, melt index ranging from 0.01 g/10 min to 100 g/10 min; and c) reacting the polyethylene composition with the masterbatch composition to form a modified polyethylene composition.

Modified polyethylene compositions and method for making the same

Growing community of inventors

Sao Paulo, Brazil

Davidson Lütkenhaus