Patent ID: 8426533
Filing Date: 2013-04-23
Classification: C08G,C08K

Abstract:
1. A process for preparing a thermoplastic polymer to achieve a predetermined polymer target stoichiometry, wherein a thermoplastic polymer is made from at least one first monomer having a first reactive end group and at least one second monomer having a second reactive end group, by reaction of the first reactive end group with the second reactive end group and has a glass transition temperature of greater than 130° C., and comprising the steps of: (a) selecting a polymer target stoichiometry, S (b) calculating an initial polymer formulation stoichiometry, S  wherein the offset factor is determined by experimentally determining an amount of a member selected from the group consisting of unreacted first monomers, unreacted second monomers, and combinations thereof, of a calibration sample thermoplastic polymer made by reacting the at least one first monomer and the at least one second monomer; (c) determining part-moles of the first reactive end group of the at least one first monomer to be initially charged to a reactor, A (d) reacting an amount of the at least one first monomer and an amount of the at least one second monomer as determined from step (c) in the reactor containing at least one organic solvent and forming a reaction mixture having solids in an amount that is more than 5 weight percent, based on the weight of the reaction mixture; (e) obtaining a sample from the reaction mixture after a period of time sufficient to allow for reaction of the at least one first monomer and the at least one second monomer to form the thermoplastic polymer; (f) separating the sample into a soluble phase and an insoluble phase comprising the thermoplastic polymer; (g) determining a first reactive end group concentration of the at least one first monomer in the thermoplastic polymer as measured in part-moles (A (h) determining a reaction stoichiometry for the sample, S (i) determining a value of S (j) selecting from, or and; (k) forming the thermoplastic polymer with a final stoichiometry, S