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    • 3. 发明申请
    • POROUS BRANCHED/HIGHLY BRANCHED POLYIMIDES
    • 多孔分支/高分支聚氨酯
    • US20140171526A1
    • 2014-06-19
    • US14104135
    • 2013-12-12
    • BASF SE
    • Anna CRISTADORORaimund PietruschkaMarc FrickeMark Elbing
    • C08J9/28
    • C08J9/286C08G73/1035C08J2201/0502C08J2379/08
    • The present invention relates to a process for the preparation of porous particles comprising at least one polyimide by reacting (A) at least one polyisocyanate having on average at least two isocyanate groups per molecule and (B) at least one polycarboxylic acid having at least two COOH groups per molecule or anhydride thereof, in the presence of at least one solvent, optionally at least one catalyst and optionally at least one further additive, to cause precipitation of a polyimide in the solvent to form the porous particles, to porous particles, obtained with this process, to parts, bodies, foams and/or material comprising these porous particles, and to the use of the porous particles or of the parts, bodies, foams and/or material as insulation material and in vacuum insulation.
    • 本发明涉及通过使(A)每分子平均具有至少两个异氰酸酯基的至少一种多异氰酸酯与(B)至少一种具有至少两个异氰酸酯基的多元羧酸反应来制备包含至少一种聚酰亚胺的多孔颗粒的方法 COOH基团,在至少一种溶剂,任选的至少一种催化剂和任选的至少一种另外的添加剂的存在下,使聚酰亚胺在溶剂中沉淀以形成多孔颗粒,得到多孔颗粒,得到 通过该方法,可以使用包括这些多孔颗粒的部件,主体,泡沫和/或材料,以及多孔颗粒或零件,主体,泡沫和/或材料作为绝缘材料和真空绝热中的用途。