Young Basile Hanlon & MacFarlane, P.C.
Method and composition for preparing polyamide powders
A method of preparing polyamide (PA) powders includes the steps of: heating a composition including PA granules, a nucleating agent and an organic solvent under normal pressure to T1 not lower than melting point (Tm) of PA granules and maintaining at T1 to dissolve PA granules; cooling the heated composition to T2 to nucleate the dissolved PA granules and maintaining at T2 to crystallize, where 15° C.≤Tm−T2≤33° C.; cooling the crystallization product to precipitate PA; and washing the precipitated product to remove the organic solvent. The weight ratio of PA granules to the nucleating agent is 100:1, and the weight ratio of PA granules to the organic solvent ranges from 0.11 to saturation solubility of PA granules in the organic solvent.
Taiwan Green Point Enterprises Co., Ltd.
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Chia-Hung Feng-Lin Yu-Pao Yao-Tang Yi-Chung Yung-Chih Hsing-Fu
Yang Chen Huang Ke Su Chen Yeh