Wolfgang Albrecht,Roland Hilke,Karola Lützow,Mario Rettschlag,Filiana Santoso,Thomas Weigel
申请号：
US11086714
公开号：
US08404278B2
申请日:
2005.03.22
申请国别(地区):
US
年份:
2013
代理人:
摘要：
The invention relates to a polyimide microparticles which can be obtained by means of the following steps: a) a polymer solution consisting of at least one polyimide polymer and a solvent or a solvent mixture is produced according to methods known per se, b) microparticles are formed from the polymer solution by spraying or by thermal phase inversion, c) the microparticles obtained in step b) are treated with an aqueous functionalization solution containing an amine-containing modifier at a high temperature, with or without stirring, and d) the modified obtained are washed and optionally dried, according to methods known per se.
