METHOD FOR ADDITION POLYMERISATION OF NORBORNENE Russian patent published in 2015 - IPC C08F32/08 C08F4/26 C07F15/00 

FIELD: chemistry.

SUBSTANCE: method includes polymerisation of norbornene using a catalyst obtained by reacting a cationic palladium complex and boron trifluoride etherate in an organic solvent medium in the presence of norbornene. Components are mixed in the following order: adding, to a norbornene solution in an organic solvent, e.g. methylene chloride, a solution of a cationic palladium complex in an organic solvent, e.g. methylene chloride, and then adding boron trifluoride etherate in pure form or in the form of a solution in an organic solvent, e.g. methylene chloride. The catalyst components used are palladium tetrafluoroborate (acetylacetonato)(α-diimine) of general formula [(acac)Pd(N^∧N)]BF₄, where acac is acetylacetonate, N,N are α-diimine ligands, such as bis[N-(phenyl)imino]acenaphthene, bis[N-(2,6-dimethylphenyl)imino]acenaphthene, N,N-(1,2-diphenylethane -1,2-diilydene)bis(2,6-dimethylaniline), bis[N-(2,6-diisopropylphenyl)imino]acenaphthene, N,N-(2,3-butanediilydene)bis(2,6-dimethylaniline), N,N-(2,3-butanediilydene)bis(2,6-diisopropylaniline). Optimum process conditions: molar ratio of boron to palladium, B:Pd=15:1-50:1, preferably B:Pd=25:1, with molar ratio of norbornene to palladium, NB/Pd=10000:1-50000:1, preferably NB/Pd=20000, at temperature 20-45°C.

EFFECT: simple method for addition polymerisation of norbornene in the presence of complexes of transition metals with α-diimine ligands.

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