The invention relates to continuous gas fluidized bed methods for making a
polymer featuring a condensing agent in a recycle stream; and also to
methods for monitoring and providing continuity in a gas fluidized bed
method for making a polymer featuring a condensing agent in a recycle
stream. Certain ranges of .DELTA..rho., in some cases combined with
certain ranges of values for A.sub.n, can be used to find and define
desirable operating states, i.e., the "steady state," "alert state,"
"corrective action state," "continuity impairment state" and/or
".DELTA..rho. alarm state," for the gas fluidized bed reactor
polymerization method (where .DELTA..rho., A.sub.n and the particular
states are disclosed herein).
