USE OF ARYL OXIDES OF ISOBUTYL ALUMINIUM AS ACTIVATORS DIALKYL METALLOCENE CATALYSTS FOR HOMOPOLYMERISATION ETHYLENE, PROPYLENE, COPOLYMERISATION OF ETHYLENE WITH PROPYLENE AND TRIPLE COPOLYMERISATION OF ETHYLENE, PROPYLENE AND DIENE, HOMOGENEOUS METALLOCENE CATALYST SYSTEMS FOR SYNTHESIS OF HOMO-AND COPOLYMERS OF OLEFINS AND DIENES, METHOD OF PRODUCING HOMO- AND COPOLYMERS OF OLEFINS AND DIENES, METHOD FOR STABILISATION OF HOMO- AND COPOLYMERS OF OLEFINS AND DIENES Russian patent published in 2016 - IPC C08F4/642 C08F110/00 C08F210/16 C08F210/18 

FIELD: chemistry.

SUBSTANCE: invention relates to use of isobutyl aluminium aryloxides of composition: AlⁱBu_x(OAr)_3-x as activators of dialkyl metallocene catalysts of transition metals of IVB Group in homopolymerisation of ethylene, propylene, copolymerisation of ethylene, propylene and triple copolymerisation of ethylene, propylene and dienes. Invention also relates to development of an effective method of producing homopolymers of ethylene, propylene, copolymers of ethylene with propylene and ternary copolymers of ethylene with propylene and dienes. Present method provides controlled synthesis of composite and fractionally homogeneous polymers with controlled microstructure, molecular weight and controlled content of comonomers in copolymer. Introduction of phenol antioxidants is provided at step of washing polymer by hydrolysis aryloxide alkylaluminium activator. Advantages of isobutyl aluminium aryloxides are: simplicity and safety of synthesis, high activating capacity at low molar ratio Al/Zr (≈10² mol/mol), stability during storage, ability to purify reaction medium from impurities of moisture without use of additional cleaning reagents and special preparation of reactor for polymerisation, as well as possibility of producing polymers containing stabilisers-antioxidants, role which is performed by phenols, formed by hydrolysis in situ during decomposition of an organoaluminium component of catalyst systems at step of washing polymer with water-alcohol solution.

EFFECT: invention relates to a method of stabilising homo- and copolymers of olefin and dienes by hydrolysis with a water-alcohol solution of isobutyl aluminium aryloxide contained in disclosed homogeneous catalyst system, at polymer washing step.

4 cl, 1 tbl, 28 ex

OAr=