Patent ID: 6391987
Filing Date: 2002-05-21
Classification: C08F

Abstract:
A process for producing a propylene/1-pentene polymer, which process comprises reacting propylene, as a first monomer reactant, with 1-pentene, as a second monomer reactant, in a reaction zone, in the presence of a Ziegler-Natta catalyst or catalyst system, to form the propylene/1-pentene polymer, with the reactants being in the vapour phase in the reaction zone while. the reaction is in progress, with no liquid component being present in the reaction zone while the reaction is in progress, and with (i) both the monomer reactants being preheated separately to ensure that they are in the vapour phase, and the monomer reactants being introduced separately into the reaction zone in the vapour phase; or (ii) at least one of the monomer reactants being introduced into the reaction zone partly in the vapour phase, so that part of that monomer is introduced into the reaction zone in a liquid phase, with this part being further evaporated in the reaction zone so that the reaction is performed with both monomer reactants in the vapour phase; or (iii) the propylene being introduced into the reaction zone in the vapour phase, while the 1-pentene is introduced into the reaction zone in the liquid phase in such an amount that it evaporates in the reaction zone so as also to be in the vapour phase, with the reaction being performed with both monomer reactants in the vapour phase.