ETHYLENE COPOLYMERS AND METHOD OF PREPARING ETHYLENE- BASED POLYMERS Russian patent published in 2000 - IPC

FIELD: chemistry of polymers. SUBSTANCE: described is new copolymer, namely copolymer of ethylene with comonomer selected from alpha-olefins of formula: CH₂=CH-CH₂R wherein R is hydrogen or linear alkyl having from 1 to 20 carbon atoms and containing from 80 to 99 mole % of ethylene units and from 1 to 20 mole % of units of said comonomer. During fractionation accomplished by temperature-raising elution, at least 90 wt % of copolymer elute within temperature range up to 50 C, and ratio of average molecular weight (M_w) to average numerical molecular weight (M_n) determined by gel penetrating chromatography method (M_w/M_n) is more than 3. Also described is method of preparing ethylene-based polymers. EFFECT: optimal mechanical properties for producing films. 15 cl, 4 ex, 2 tbl