| 摘要 |
1,228,881. Chlorinating propylene polymers. BADISCHE ANILIN- & SODA - FABRIK A.G. 28 Aug., 1968 [29 Aug., 1967], No. 41121/68. Heading C3P. A chlorinated propylene polymer is prepared by the action of gaseous chlorine on a finely particled propylene polymer having a molecular weight of from 300,000 to 5,000,000 and an average particle diameter of from 200 to 5000 microns in suspension in a chlorohydrocarbon at a temperature of from 40‹ to 90‹ C., the propylene polymer used containing a fraction of more than 10% by weight which is soluble in boiling n-heptane at 760 mm. Hg pressure. The propylene polymers are homopolymers ofpropylene and copolymers of propylene with other olefins e.g. ethylene or butene-1 containing at least 90% by weight of polymerized units of propylene. The process may be carried out by continuously introducing polymer, chlorohydrocarbon and chlorine into a reaction zone, continuously removing a part of the liquid phase of the reaction mixture consisting of chlorohydrocarbon having chlorine and chlorinated polymer dissolved therein from the reaction zone corresponding in amount to the amount of constituents introduced, and separating the chlorinated polymer from the liquid phase. In the examples a polypropylene which has been prepared using a catalyst of titanium trichloride and diethyl aluminium chloride in the absence of solvents or suspension agents is chlorinated in suspension in carbon tetrachloride. |
