An object of the present invention is to provide a polyethylene for injection molding, which has an excellent balance between moldability and durability, and a molded article such as an injection-molded plastic fuel tank that has an excellent balance among injection moldability, durability, and impact resistance. The invention relates to a polyethylene for injection molding, the polyethylene comprising at least two types of specific polyethylenes, wherein the density, the high load melt flow rate, and the relationship between the weight ratio and the density of the polyethylene satisfy specific characteristics.

An object of the present invention is to provide a polyethylene for injection molding, which has an excellent balance between moldability and durability, and a molded article such as an injection-molded plastic fuel tank that has an excellent balance among injection moldability, durability, and impact resistance. The invention relates to a polyethylene for injection molding, the polyethylene comprising at least two types of specific polyethylenes, wherein the density, the high load melt flow rate, and the relationship between the weight ratio and the density of the polyethylene satisfy specific characteristics.

Described is a bi-oriented polyolefin film comprising at least one B layer comprising at least one propylene polymer and 2.0-5.0% by weight of carbonate of at least one alkaline or alkaline earth metal, wherein the carbonate has average particle diameter d(50) of less than or equal to 2.0 micron.

A composition for use in jacketing or insulation materials that has from 42 to 54 percent by weight of a halogen-free flame retardant, from 26 to 46 percent by weight of an ethylene alkyl acrylate copolymer, such as ethylene ethyl acrylate, optionally from 0 to 15 percent by weight of an ethylene-based polymer, optionally from 0 to 12 percent by weight of a coupling agent, and optionally from 0 to 1 percent by weight of an antioxidant. A cable insulation layer, a cable protective outer jacket, a cable core sheath, and cable may include the jacketing material composition.

A composition for use in jacketing or insulation materials that has from 42 to 54 percent by weight of a halogen-free flame retardant, from 26 to 46 percent by weight of an ethylene alkyl acrylate copolymer, such as ethylene ethyl acrylate, optionally from 0 to 15 percent by weight of an ethylene-based polymer, optionally from 0 to 12 percent by weight of a coupling agent, and optionally from 0 to 1 percent by weight of an antioxidant. A cable insulation layer, a cable protective outer jacket, a cable core sheath, and cable may include the jacketing material composition.

The present invention relates to a branched modifier and a composition comprising more than 25 wt % (based on the weight of the composition) of one or more linear ethylene polymers having a g.sub.vis of 0.97 or more and an Mw of 20,000 g/mol or more and at least 0.1 wt % of a branched modifier where the modifier has a) a g.sub.vis of 0.70 or less; b) an Mw of 100,000 g/mol or more; c) an Mw/Mn of 4.0 or more; d) a shear thinning ratio of 110 or more, e) a melt strength of 10 cN or more; f) a complex viscosity at 0.1 rad/sec at 190 C. of at least 130,000 Pa.Math.s; and g) a phase angle of Z or less where Z=138.3G*.sup.(0.142), where G* is the complex modulus reported in Pascals measured at 190 C. and the phase angle units are reported in degrees, wherein the G* is from 1,000 to 1,000,000 Pa.

A polymer composition may include an elastomeric ethylene-vinyl acetate, in which at least a portion of ethylene from the elastomeric ethylene-vinyl acetate is obtained from a renewable source of carbon. A curable polymer composition, an expandable polymer composition, articles, cured articles, and expanded articles may include or be formed from such polymer composition. A process for producing a polymer composition may include polymerizing ethylene at least partially obtained from a renewable source of carbon with vinyl acetate to produce an ethylene vinyl acetate copolymer; and mixing the ethylene-vinyl acetate copolymer with an elastomeric polyolefin to produce an elastomeric ethylene-vinyl acetate.

A polyethylene composition comprising a base resin is disclosed herein. The base resin includes an ethylene homo- or copolymer fraction (A1), and an ethylene homo- or copolymer fraction (A2). Fraction (A1) has a lower weight average molecular weight than fraction (A2). The base resin has a melt flow rate MFR.sub.21 of equal to or less than 8.0 g/10 min and a density of 930 to 950 kg/m3. The polyethylene composition has a melt flow rate MFR.sub.5 of 0.01 to 0.3 g/10 min, a flow rate ratio FRR.sub.21/5 of equal to or more than 20 and a ratio of the weight average molecular weight and the number average molecular weight (M.sub.w/M.sub.n) of equal to or less than 30. Also the polyethylene composition has a tensile modulus of less than 1000 MPa. Also a process for the production of a polyethylene composition comprising polyethylene base resin is disclosed herein.

A polyethylene composition comprising a base resin is disclosed herein. The base resin includes an ethylene homo- or copolymer fraction (A1), and an ethylene homo- or copolymer fraction (A2). Fraction (A1) has a lower weight average molecular weight than fraction (A2). The base resin has a melt flow rate MFR.sub.21 of equal to or less than 8.0 g/10 min and a density of 930 to 950 kg/m3. The polyethylene composition has a melt flow rate MFR.sub.5 of 0.01 to 0.3 g/10 min, a flow rate ratio FRR.sub.21/5 of equal to or more than 20 and a ratio of the weight average molecular weight and the number average molecular weight (M.sub.w/M.sub.n) of equal to or less than 30. Also the polyethylene composition has a tensile modulus of less than 1000 MPa. Also a process for the production of a polyethylene composition comprising polyethylene base resin is disclosed herein.

Peroxide masterbatch comprising: 15-55 wt % of one or more organic peroxides, 15-45 wt % of one or more copolymers of at least two different monomers, the first monomer being ethylene or propylene, the second monomer being a vinyl monomer comprising at least four carbon atoms and optionally heteroatoms, 6-70 wt % of at least two filler typesfiller type 1 and filler type 2each having a different BET surface area: (i) filler type 1 being present in the masterbatch in a concentration of 3-30 wt % and having a BET surface area of more than 100 m.sup.2/g; (ii) filler type 2 being present in the masterbatch in a concentration of 3-40 wt % and having a BET surface area of 100 m.sup.2/g or less; wherein the masterbatch has the form of extrudates.