| 摘要 |
Rubbery amorphous sulphur vulcanizable terpolymers are formed by copolymerizing ethylene, at least one higher 1-olefine having at least 3 carbon atoms and a monomer capable of rendering the resulting polymer sulphur vulcanizable in a solvent using a catalyst formed by mixing (1) an organoaluminium compound, (2) at least one organic orthovanadate or vanadyl acetylacetonate and (3) at least one of (a) elemental halogen, (b) hydrogen halides, (c) secondary and tertiary haloalkanes and aryl-substituted derivatives thereof, (d) allyl-type halides, (e) aryl-substituted halomethanes and (f) organic and inorganic halides of germanium, tin, silicon or lead, the halogen in (a) to (f) being selected from chlorine, bromine and iodine, the reaction being carried out under polymerization conditions in presence of a solvent, which may be the monomer. The monomers imparting sulphur vulcanizability include cyclic and acyclic non-conjugated dienes having 5 to 12 carbon atoms. Fulvene compounds are also mentioned. Catalyst component (1) employed has the formula R3Al where R is a hydrocarbon radical selected from saturated acyclic, saturated cyclic and aromatic radicals containing 1 to 20 carbon atoms. Lists of catalyst component (3) are given. In the examples ethylene, propylene and dicyclopentadiene are terpolymerized using as catalyst triisobutyl aluminium, tributyl orthovanadate and one of the following HCl gas, Cl2 gas, iodine, benzyl chloride, 1,4-diiodo-2-butene, t-butyl chloride; and dichlorodiphenyltin. The terpolymers may be vulcanized. |
