| 摘要 |
Ethylene and a second linear 1-olefin are passed into an inert organic liquid solvent at 0 to 125 DEG C. the ratio of ethylene to other olefin in the solvent being kept constant throughout the reaction, and polymerized using as catalyst a mixture of an aluminium compound of formula R2AlX where R is HC and X is halogen, with a vanadium compound of formula VOY 3- n X n where Y is an alkoxide group or an acetylacetonate group, X is halogen and n is 0, 1 or 2 where Y is an alkoxide group and 0 when Y is an acetylacetonate. Propylene, and 1-butene are specified second olefins, while diethyl aluminium chloride is a specified aluminium compound. Specified vanadium compounds are triethyl, tri (n-propyl), tri (n-butyl), tri (t-butyl), diethyl chloro, and monoethyldichloro, ortho vanadates, vanadium oxy triacetylacetonate, vanadium oxy tri (fluoroacetylacetonate) and vanadium oxy tri (hexafluoroacetylacetonate). The catalyst mixture may be added continuously or in increments, throughout the reaction or may be formed during the reaction. The usual inert hydrocarbon solvents are present. |
