1-BUTENE COPOLYMERS AND PROCESSES FOR PRODUCTION THEREOF Russian patent published in 2008 - IPC C08F210/08 C08L23/02 C08F4/656 C08L23/18 C08F4/64 

FIELD: polymer production.

SUBSTANCE: invention relates to 1-butene copolymers containing up to 40 mol % ethylene or propylene derivatives. Copolymer of 1-butene with ethylene or propylene is described, which copolymer contains up to 40 mol % of ethylene and/or propylene units derivatives and manifests following properties: (a) product of copolymerization constants r1·r2 ≤ 2; (b) content of 1-butene units in the form of stereoregular pentads (mmmm) > 98%; and (c) lack of 4,1-inclusions of 1-butene units. Described are also: polymer compositions for manufacturing films, which contains above-indicated polymer; industrial product obtained from this copolymer; and a method for preparing such copolymer comprising 1-butene/ethylene (and/or propylene) copolymerization in presence of stereoregular catalyst containing (A) solid catalytic component including Ti compound and electron-donor compound selected from MgCl₂-supported phthalates; (B) alkylaluminum compound; and (C) outer electron-donor compound of formula Ra⁵Rb⁶Si(OR⁷)c, wherein a and b are integers from 0 to 2, c is integer from 1 to 3, and sum (a+b+c)= 4, R⁵, R⁶, and R⁷ represent alkyl, cycloalkyl, or aryl radicals with 1-18 carbon atoms, optionally containing heteroatoms.

EFFECT: achieved specific balance between stereoregularity and distribution of comonomer, lack of 4,1-inclusions, and increased stretching strength.

26 cl, 8 tbl, 14 ex