| 摘要 |
1,181,743. Polymerisation catalysts. MITSUBISHI CHEMICAL INDUSTRIES Ltd. 8 March, 1968 [9 March, 1967; 7 Aug., 1967; 18 Sept., 1967], No. 11309/68. Heading B1E. [Also in Division C3] A polymerization catalyst for α-olefins comprises the product formed by mixing (a) a halide of a metal having a lower valency than its maximum valency of the transition metals of Groups IV to VI of the Periodic Table, (b) an organoaluminium halide and (C) an ion exchange resin. Specified transition metals are Ti, V, Cr and Mo and the preferred halides are the titanium trihalides. The organoaluminium halide may be of the general formula A1R n X 3-n where R is an alkyl group of 1 to 12 carbon atoms, X is a halogen (e.g. Cl, Br and I) and n is 1 or 1-5 or 2. The ion exchange resin may be of the strong acid or weak acid cation type e.g. sulphonic and carboxylic type resins, or preferably of the strong or weak basic anion type e.g. amine and quaternary ammonium resins in the hydroxide or the salt form. The catalyst components are usually mixed in a solvent and subjected to a heat treatment at 40‹C to 150‹C in an inert gas atmosphere. |
