| 摘要 |
The invention relates to a method for preparing a powdered polymer selected from a polyamide, a copolyamide or a copolyesteramide by anionic polymerisation in a solvent solution, characterised in that the polymerisation of the monomer(s) generating said polymer is made in the presence of a catalyst, an activator, at least one amide, one of which is always a N, N'-alkylene bis amide, and an inorganic or organic feedstock, the amount of N, N'-alkylene bis amide added in the medium being determined based on the specific surface area desired for the powder particles, said powder particles having an essentially constant diameter or one depending on the desired mean diameter of the powder particles, said powder particles having an essentially constant specific surface area. |
