COMPOSITION OF POLY-ARYLENE-ETHER-KETONE-KETONES POWDERS ALLOWING EXCELLENT COMPROMISE COULABILITY AND COALESCENCE ADAPTED FOR LASER SINTERING

摘要

The present invention relates to a composition comprising from 99.6 to 99.99% by weight of at least one powder of at least one polyarylene ether ketone and 0.01 to 0.4% by weight of a hydrophilic flow agent. This hydrophilic flow agent is characterized by a weight gain (amount of water absorbed) after 5 days of conditioning at a relative humidity of 95% greater than 0.5%. This mass uptake of the flow agent is determined by Karl Fisher measurement after desorption of water by a 15 min treatment at 170 ° C. This composition is suitable for laser sintering. In particular, it allows an excellent compromise flowability and coalescence of the powder.