PROCESS FOR THE PREPARATION OF POROUS PROPYLENE POLYMERS Russian patent published in 2018 - IPC C08F10/06 C08F210/06 C08F4/649 

FIELD: technological processes.

SUBSTANCE: invention relates to a process for the preparation of stereoregular porous polypropylene polymers. Process for the preparation of a porous propylene (co)polymer with a porosity more than 0.33 cm³/g. Process proceeds in a catalytic system comprising (a) Ziegler-Natta catalyst containing at least two electron-donor compounds, one of which is a succinateand and presents in amount of 50–90 % by mol with respect to the total amount of donors, and the other is a 1,3 diether, (b) an aluminum alkyl and, in addition, (c) an external electron-donor compound. Catalyst components (a) and (b) are contacted for a period of time ranging from 1 to 60 minutes at a temperature ranging from 35 to 55 °C. Then, pre-polymerizing is carried out with one or more olefins of formula CH₂=CHR, where R is H or C₁-C₁₀ hydrocarbon group, to form amounts of polymer from 0.1 up to about 1,000 g per gram of solid catalyst component (a). Polymerizing propylene takes place in the optional presence of minor amount of ethylene and/or C₄-C₁₀ alpha-olefins, for producing the porous propylene (co)polymer. Technical result is the production of a porous propylene (co)polymer with porosity more than 0.33 cm³/g.

EFFECT: production of a porous propylene (co)polymer.

8 cl, 3 tbl, 6 ex