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    • 5. 发明申请
    • Process for producing fine porous polyimide particle
    • 微孔聚酰亚胺微粒的制造方法
    • US20060039984A1
    • 2006-02-23
    • US10537497
    • 2003-07-09
    • Hachiro NakanishiHitoshi KasaiHirohiko MiuraHidetoshi OikawaShuji Okada
    • Hachiro NakanishiHitoshi KasaiHirohiko MiuraHidetoshi OikawaShuji Okada
    • A61K9/14B29B9/00
    • C08J9/28C08J2201/0543C08J2201/0546C08J2379/08C08L79/08
    • A method for preparation of porous polyimide microparticles comprising, forming polyamide acid microparticles by pouring polymer solution prepared by dissolving polyamide acid containing 0.5 to 80 weight % of alkali metal salt to polyamide acid by 0.1 to 15 weight % concentration into a poor solvent selected from the group consisting of aliphatic solvents, alicyclic solvents, aromatic solvents, CS2 and mixture of two or more these solvents and the temperature of which is adjusted to the range from −20° C. to 60° C., wherein particle size of said polyamide acid microparticles is adjusted to 50 nm to 10000 nm by controlling the temperature of said poor solvent, pore size of said polyamide acid microparticles is adjusted to the range from 20 nm to 500 nm and porosity of said polyamide acid microparticles is adjusted to the range from 0.1% to 30% by controlling a content or a kind of said alkali metal salt, then treating said polyamide acid microparticles by chemical imidation or thermal imidation, or by thermal imidation after chemical imidation so that the particle size distribution, pore size and porosity of said polyamide acid microparticles can be maintained.
    • 一种多孔聚酰亚胺微粒的制备方法,其特征在于,包括:将聚合物溶液倒入聚酰胺酸性微粒中形成聚酰胺酸微粒,所述聚合物溶液是将含有0.5〜80重量%的碱金属盐的聚酰胺酸溶解在0.1〜15重量%浓度的聚酰胺酸中, 由脂族溶剂,脂环族溶剂,芳族溶剂,CS 2和两种或更多种这些溶剂的混合物组成的组,其温度调节至-20℃至60℃。 通过控制所述不良溶剂的温度将所述聚酰胺酸微粒的粒径调整为50nm〜10000nm,将所述聚酰胺酸微粒的孔径调整为20nm〜500nm,将所述聚酰胺酸的孔隙率 通过控制所述碱金属盐的含量或种类将微粒调节至0.1%至30%的范围,然后通过化学酰亚胺化处理所述聚酰胺酸微粒 或热酰亚胺化,或通过化学酰亚胺化后的热酰亚胺化,使得可以维持所述聚酰胺酸微粒的粒度分布,孔径和孔隙率。