Control of degree of conversion

Claim 1

IN A CONTINUOUS CATALYTIC POLYMERIZATION PROCESS WHEREIN THE POLYMER DENSITY IS GREATER THAN THE DENSITY OF REACTANTS MIXTURE AND IS A PROPORTIONAL FUNCTION OF THE AMOUNT OF ADDED CATALYST, SAID POLYMERIZATION BEING AT A TEMPERATURE BETWEEN ABOUT -76* AND ABOUT -112* F. AND, IN AT LEAST ONE STAGE, SAID REACTANTS MIXTURE COMPRISING A DILUENT AND AN ADMIXTURE OF A C3-C8 OLEFIN WITH A MONOMER SELECTED FROM THE GROUP CONSISTING OF A VINYL AROMATIC HYDROCARBON, A HALOGATED VINYL AROMATIC HYDROCARBON, A C4-C14 MULTIOLEFIN, AND MIXTURES THEREOF, THE DILUENT COMPRISING AN ALKYL HALIDE WHICH IS A SOLVENT FOR THE RESULTING POLYMER, AT LEAST TWO OF SAID MEMBERS OF SAID REACTANTS MIXTURE HAVING APPROXIMATELY THE SAME DENSITY AT A SPECIFIC TEMPERATURE LEVEL BETWEEN ABOUT 70* AND ABOUT 120*F., THE IMPROVEMENT WHICH COMPRISES MIXING SAID MEMBERS FOR INTRODUCTION TO THE FIRST POLYMERIZATION STAGE AT SAID TEMPERATURE LEVEL, BLENDING THEREWITH SUFICIENT AMOUNTS OF THE REMAINING MEMBERS OF SAID REACTANTS MICTURE TO GIVE A PREDETERMINED DENSITY OF THE BLEND FORMED AT SAID TEMPERATURE LEVEL, COOLING THE BLEND FORMED AT SAID TEMPERATURE LEVEL, -250*F., AND THEREAFTER CONTINUOUSLY REGULATING THE CATALYST ADDITION RATE TO AT LEAST THE FIRST STAGE IN PROPORTION TO CHANGES IN DENSITY OF THE REACTION MIXTURE CONTAINING POLYMER PRODUCT WITHDRAWN THEREFROM AND MEASURED AT SAID TEMPERATURE LEVEL OF BETWEEN ABOUT 70* AND ABOUT 120*F., THE HIGHER THE CATALYST CONDITION RATE, THE HIGHER THE RESULTING DENSITY.