Biodegradable porous polymer scaffolds for tissue engineering prepared from an effervescent mixture and its preparation
    81.
    发明授权
    Biodegradable porous polymer scaffolds for tissue engineering prepared from an effervescent mixture and its preparation 失效
    由泡腾混合物制备的用于组织工程的可生物降解的多孔聚合物支架及其制备

    公开(公告)号:US06562374B1

    公开(公告)日:2003-05-13

    申请号:US09699213

    申请日:2000-10-27

    Abstract: The present invention provides a method for preparing biodegradable porous polymer scaffolds for tissue engineering, comprising: a) fabricating a polymer sample from a polymer solution containing at least one biodegradable polymer and an effervescent mixture; b) effervescing the polymer sample in the presence of an effervescent medium such as an aqueous alcohol solution; and c) drying. The method for preparing biodegradable polymer scaffolds of the present invention has the advantages that the process is simple, that pore size can be easily controlled, that the problem caused by the secretion and existence of the toxic substance can be avoid by using a material harmless to human body, and that high efficiency can be achieved. In addition, biodegradable porous polymer scaffolds prepared by above method have the advantages that high porosity can be achieved and an open cell structure in which pores are interconnected is obtained.

    Abstract translation: 本发明提供了一种制备用于组织工程的可生物降解的多孔聚合物支架的方法,包括:a)从含有至少一种可生物降解的聚合物和泡腾混合物的聚合物溶液制备聚合物样品; b)在存在聚合物样品的情况下, 泡腾介质如醇水溶液; 和.c)干燥。本发明的可生物降解的聚合物支架的制备方法具有以下优点:该方法简单,可以容易地控制孔径,通过使用可以避免由分解和存在的有毒物质引起的问题 对人体无害的物质,可以实现高效率。 此外,通过上述方法制备的可生物降解的多孔聚合物支架具有能够获得高孔隙率并且获得孔互连的开孔结构的优点。

    Opaque, microcellular films from latex compositions, process and
composition for preparing the same
    84.
    发明授权
    Opaque, microcellular films from latex compositions, process and composition for preparing the same 失效
    来自胶乳组合物的不透明的微孔膜,其制备方法和组合物

    公开(公告)号:US3951899A

    公开(公告)日:1976-04-20

    申请号:US151735

    申请日:1971-06-10

    Inventor: Jerome A. Seiner

    Abstract: The disclosed invention relates to films from a novel latex mixture which are non-porous, microcellular and opaque in the absence of an opacifying agent. The preparation of the films of the disclosed invention comprises providing control techniques for entrapping a sufficient amount of a liquid non-solvent for the polymer in the polymer matrix of a latex after the continuous phase removal, so that upon evaporation of the non-solvent from a coalesced and tack-free polymer matrix, a resulting opaque and continuous, non-porous film is produced which will have minute, discrete and substantially closed voids and which is opaque in the absence of an opacifying agent such as pigment.The disclosed invention also relates to opaque films with enhanced optical properties produced by the inclusion of pigments, fluorescent materials and optical brighteners in the opaque films in such a manner as to maximize their effectiveness therein.

    Abstract translation: 所公开的发明涉及在不存在不透明剂的情况下来自无孔,微孔和不透明的新型胶乳混合物的膜。 所公开的发明的膜的制备包括提供控制技术,用于在连续除去之后将聚合物的足够量的液体非溶剂包封在胶乳的聚合物基质中,使得当非溶剂从 产生聚结和无粘性的聚合物基质,产生不透明和连续的非多孔膜,其将具有微小的,离散的和基本上闭合的空隙,并且在不存在不透明剂如颜料的情况下是不透明的。

    POROUS BIOABSORBABLE MATERIAL AND METHOD OF PRODUCING THE SAME
    90.
    发明公开
    POROUS BIOABSORBABLE MATERIAL AND METHOD OF PRODUCING THE SAME 审中-公开
    PORÖSESBIORESORBIERBARES材料在HERSTELLUNGSVERFAHRENDAFÜR

    公开(公告)号:EP2002851A2

    公开(公告)日:2008-12-17

    申请号:EP07739214.0

    申请日:2007-03-20

    Applicant: JMS Co., Ltd.

    Abstract: [PROBLEMS]
    To provide a thin film-shaped porous bioabsorbable material that is a dense structure in which the pore size average is small and the pore size is uniform and which further has a large maximum stress, in particular, a porous bioabsorbable material extremely useful as an adhesion preventing material.
    [MEANS FOR SOLVING PROBLEMS]
    A porous bioabsorbable material characterized by being formed of a porosified bioabsorbable polymer which is obtained in a manner that a bioabsorbable polymer is gelled with a good solvent and a poor solvent, compatible with each other, for the bioabsorbable polymer and the gelled bioabsorbable polymer is subjected to freeze-drying to be porosified; and a method of producing the porous bioabsorbable material, the method being characterized in that a bioabsorbable polymer is gelled with a mixed solvent composed of a good solvent and a poor solvent, compatible with each other, for the bioabsorbable polymer and the gelled bioabsorbable polymer is subjected to freeze-drying to be porosified.

    Abstract translation: [问题]提供一种致密结构的薄膜状多孔生物可吸收材料,其特征在于孔尺寸平均小,孔径均匀且进一步具有大的最大应力,特别是多孔生物可吸收材料非常有用 作为防粘连材料。 用于解决问题的方法一种多孔生物可吸收材料,其特征在于由可生物吸收性聚合物形成的生物可吸收性聚合物形成,所述生物可吸收性聚合物以生物可吸收性聚合物凝胶化,所述生物可吸收性聚合物与生物可吸收聚合物相互相容的良溶剂和不良溶剂凝胶化, 将凝胶状生物体吸收性聚合物进行冷冻干燥以进行孔化; 以及生产该多孔生物可吸收材料的方法,其特征在于,生物可吸收聚合物由生物可吸收性聚合物相互相容的由良溶剂和不良溶剂组成的混合溶剂凝胶化,凝胶化生物可吸收聚合物为 进行冷冻干燥以进行孔化。

Patent Agency Ranking