POLYOLEFIN COMPOSITIONS HAVING HIGH HEAT RESISTANCE, LOW CONTENT OF HEXANE EXTRACTABLE AGENTS AND CONTROLLABLE MODULUS OF ELASTICITY Russian patent published in 2001 - IPC

FIELD: chemistry of polymers. SUBSTANCE: described is polymeric mixture having high heat resistance, low content of hexane extractable agents and controllable low or high moduluses of elasticity. Mixture comprises at least one substantially linear ethylene polymer, component (A) and at least one second ethylene polymer which is homogeneously branched polymer, heterogeneously branched linear polymer or of low density. In order to prepare film, mixture has thermal welding initiation temperature which is much lower than Vick heat resistance of said film and also high ultimate adhesion strength at high temperature. In order to manufacture cast product, mixture has high resistance to microwave deformation with low modulus of elasticity remaining unchanged. Polymeric mixture is especially suitable for use in multiplayer film structures such as packing during cooking operation hot filled packing and barrier shrinkable films. When applied for molding purposes, mixture is well suited as containers or storing foodstuffs for microwave freezing stoves and caps which retain adequate elasticity at low temperature, thus making it possible to open easily such containers. EFFECT: improved properties of the polyolefin composition. 1 cl, 6 dwg, 11 tbl