Disclosed herein is a method of preparing a polymer dispersion including combining a first solution with a second solution to provide an emulsion, and removing the first solvent from the emulsion to provide a dispersion including a plurality of polymer particles. The first solution includes a first solvent, a polyetherimide, a polycarbonate, or a combination of at least one of the foregoing, and optionally a nonionic surfactant. The second solution includes an aqueous solvent, and optionally a nonionic surfactant. The polymer particles have an average particle size (D50) of less than or equal to 20 micrometers. Also described are polyetherimide dispersions including a plurality of polyetherimide particles, wherein at least 90% of the particles have a particle size less than or equal to 14 micrometers, a nonionic surfactant, and an aqueous carrier.
本文公开了一种制备聚合物分散体的方法,包括将第一种溶液与第二种溶液混合以提供乳液,并从乳液中去除第一种溶剂以提供包括多种聚合物颗粒的分散体。第一种溶液包括第一种溶剂、聚醚
酰亚胺、聚
碳酸酯或上述至少一种的组合,以及可选的非离子表面活性剂。第二种溶液包括
水性溶剂和非离子表面活性剂。聚合物颗粒的平均粒径(D50)小于或等于 20 微米。还描述了聚醚
酰亚胺分散体,包括多个聚醚
酰亚胺颗粒(其中至少 90% 的颗粒粒径小于或等于 14 微米)、非离子表面活性剂和
水性载体。