A method for the preparation of porous copolymerizable esters, amides, powder and the powders thus prepared

摘要

Ra esente invention relates to a proc ed e ra separation of powders of copolyesteramides by polym erisation copolym erise anionic in which it is in solution in a solvent, at least a lactam and at least one lactone of pr esence of a catalyst and an activator. According to a first embodiment, pr ef er ee of the invention is copolym erise at least two lactams and at least one lactone. According to a second pr ef er ee of the invention, the copolym erisation in pr esence of an organic filler or min 'meeting finely divided ee. According to a third pr ef er ee of the invention, the copolym erisation in pr esence of an n, n '- alkylene bis amide such as ethylene bis (ebs) of st earamide written in ep 192 515 or a g 'meeting, the amides of formula r1 - nh - co - r2 in which r1 may be replaced e by a radical r3 - co - nh - our3 - o - and in which r1, r2, r3 of are mini an aryl radical, alkyl or cycloalkyl. Ra esente invention also relates to the powders of copolyesteramides comprising, in moles (the total being 100%) . 1 to 98% of a lactam, . 1 to 98% of a lactam. 1 to 98% of a lactone, and which have a diameter comprised between 1 m and 200 m, a surface sp ecifique between 1 and 25 m2 / g. the present invention also relates to the use of these powders diff erent.