Patent ID: 11905381
Assignee: XEROX CORPORATION
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B | IPC C

Claim 0:
1. A method comprising:
combining a diamine and a dianhydride in a first dry, high boiling point solvent;
reacting the diamine and the dianhydride to produce a mixture comprising a poly(amic acid) (PAA) and the first dry, high boiling point solvent;
emulsifying the mixture in a matrix fluid that is immiscible with the first dry, high boiling point solvent using an emulsion stabilizer comprising nanoparticles or polystyrene-co-acrylate to form a precursor emulsion that is an oil-in-oil emulsion; and
heating the precursor emulsion during and/or after formation to a temperature sufficient to polymerize the PAA to form polyimide microparticles.