Patent ID: 8232333
Filing Date: 2012-07-31
Classification: C08J,C09D,Y10S

Abstract:
1. A process for preparing an ultrafine powder based on a polyamide comprising preparing a suspension by suspending inorganic particles in an alcoholic medium with introduction of an energy input of greater than 1000 kJ/m 3 , contacting the polyamide having a relative solution viscosity η rel in a range from 1.5 to 2.0, measured in a 0.5% m-cresol solution at 25° C., with the suspension under the action of pressure and/or temperature to generate an at least partial solution, and then precipitating the polyamide from the at least partial solution, wherein the suspension is prepared by, prior to introduction of an energy input of greater than 1000 kJ/m