POLYETHYLENE MOLDING MASS WITH IMPROVED BALANCE BETWEEN FISSURING RESISTANCE, HARDNESS, AND DEGREE OF BLOWING, METHOD OF PREPARING SUCH MASS, AND APPLICATION THEREOF Russian patent published in 2005 - IPC

FIELD: polymer materials.

SUBSTANCE: invention relates to polyethylene molding mass with multimodule molecular weight distribution intended to manufacture hollow articles such as gas tanks, canisters, barrels, and bottles using extrusion. Molding mass has density at least 0.940 g/cm³, contains low-molecular polyethylene with viscosity index 40-150 cm³/g in amount 30 to 60%, high-molecular copolymer of ethylene with another C4-C10-olefin with viscosity index 150-800 cm³/g in amount 30 to 65%, and ultrahigh-molecular polyethylene with viscosity index in the region 900-3000 cm³/g in amount 1 to 30%. Molding mass is prepared by cascade-based suspension polymerization.

EFFECT: increased degree of blowing and improved balance between hardness and fissuring resistance.

3 cl, 2 tbl, 5 ex