多孔聚烯烃颗粒的制备方法

    公开(公告)号:CN1207749A

    公开(公告)日:1999-02-10

    申请号:CN96199755.9

    申请日:1996-11-15

    Abstract: 本发明涉及多孔聚烯烃的制备方法,此方法包括下列步骤:1)将至少一种结晶聚烯烃溶解在溶剂中,形成一种含0.1~50wt.%的聚烯烃溶液,和含5ppm~20wt.%的成核剂的初始聚烯烃溶液:2)将所得的聚烯烃溶液分散在非溶剂中以形成一个多相物系,其分散温度高于聚烯烃溶液中聚烯烃的结晶温度;3)将多相物系冷却并同时搅拌,冷却速率为0.05~10℃/min,直至温度低于聚烯烃溶液中聚烯烃的结晶温度时,由此形成坚韧的含聚烯烃的颗粒;4)将含聚烯烃的颗粒与液体分离;5)干燥含聚烯烃颗粒,其干燥温度低于初始聚烯烃溶液中聚烯烃的结晶温度。

    Polyolefin-based microporous film and method for production the same
    15.
    发明专利
    Polyolefin-based microporous film and method for production the same 有权
    基于聚烯烃的微孔薄膜及其制造方法

    公开(公告)号:JP2009160933A

    公开(公告)日:2009-07-23

    申请号:JP2008332246

    申请日:2008-12-26

    Abstract: PROBLEM TO BE SOLVED: To provide a separation membrane excellent in rigidity, perviousness, quality stability and thermal stability. SOLUTION: This separation membrane is a polyolefin-based two- or three-layered microporous film composed by combining a layer comprising polyethylene which is produced by a wet process and has the melting point of ≥125°C, with a layer comprising 20-70 wt.% of polypropylene which is produced by a dry process and has a melting point of ≥160°C and 80-30 wt.% of a heat-resistant filler. The micropore in the layer comprising polyethylene is made through the stretching/extraction process and its average size is ≤0.1 μm. The macropore in the layer comprising polypropylene and the heat-resistant filler is formed by the interfacial expansion therebetween and has an average pore size of ≥1 μm but ≤50 μm, film thickness of 9-30 μm, perforation strength of ≥0.15 N/μm, permeability of ≥1.5×10 -5 Darcy and melt fracture temperature of ≥170°C. COPYRIGHT: (C)2009,JPO&INPIT

    Abstract translation: 要解决的问题:提供刚性,渗透性,质量稳定性和热稳定性优异的分离膜。 解决方案:该分离膜是聚烯烃基二层或三层微孔膜,其通过将通过湿法制备并具有≥125℃的熔点的聚乙烯层与包含 20-70重量%的聚丙烯,其通过干法生产并具有≥160℃的熔点和80-30重量%的耐热填料。 包含聚乙烯的层中的微孔通过拉伸/提取工艺制成,其平均尺寸≤0.1μm。 包含聚丙烯和耐热填料的层中的大孔由它们之间的界面膨胀形成,平均孔径≥1μm,≤50μm,膜厚9-30μm,穿孔强度≥0.15N/ μm,渗透率≥1.5×10 -5 达西,熔体断裂温度≥170℃。 版权所有(C)2009,JPO&INPIT

    Method for producing porous polyimide-based fine particle

    公开(公告)号:JP2004196869A

    公开(公告)日:2004-07-15

    申请号:JP2002363973

    申请日:2002-12-16

    Abstract: PROBLEM TO BE SOLVED: To provide a method for simply producing porous polyimide fine particles in good reproducibility.
    SOLUTION: This method for producing the porous polyimide fine particles comprises dissolving a polyamic acid containing an alkali metal salt in an amount of 0.5 to 80wt.% based on the polyamic acid in a good solvent selected from organic polar solvents in a concentration of 0.1 to 15wt.%, pouring the obtained polymer solution in a poor solvent selected from aliphatic solvents, alicyclic solvents, aromatic solvents, CS
    2 and the mixtures of the solvents and controlled to a temperature of -20 to 60°C to form the porous polyamic acid fine particles having particle diameters of 50 to 10,000nm and having pour diameters of 20 to 500nm and a porosity of 0.1 to 30% which are controlled with the content and kind of the alkali metal salt, and then subjecting the polyamic acid particles to a chemical imidization reaction or a thermal imidization reaction or to the chemical imidization reaction and then to the thermal imidization reaction. Thus, the porous polyimide fine particles holding the above-described pore diameters and porosity is produced.
    COPYRIGHT: (C)2004,JPO&NCIPI

    MICROPOROUS MATERIAL CONTAINING A SECURITY FEATURE
    20.
    发明申请
    MICROPOROUS MATERIAL CONTAINING A SECURITY FEATURE 审中-公开
    包含安全功能的微波材料

    公开(公告)号:WO2008060747A2

    公开(公告)日:2008-05-22

    申请号:PCT/US2007078611

    申请日:2007-09-17

    Abstract: Provided is a microporous material, e.g., a microporous sheet material, having a matrix of polyolefin, finely-divided, substantially water insoluble particulate filler, a network of interconnecting pores communicating throughout the microporous material, and at least one retrospectively identifiable taggant material embedded within the matrix, wherein the polyolefin is present in the microporous material in an amount of 20 to 60 weight percent, based on the weight of the microporous material. The taggant material provides a marker, signature or code that is capable of retrospective identification by machine, instrument or by the naked eye. Articles including the microporous material and processes for preparing the microporous material also are provided.

    Abstract translation: 提供了一种微孔材料,例如微孔片材,其具有聚烯烃基质,细分的,基本上不溶于水的颗粒填料,在整个微孔材料中连通的相互连接的孔的网络,以及至少一个可回收识别的标记物材料 基质,其中基于微孔材料的重量,聚烯烃以20至60重量%的量存在于微孔材料中。 标签材料提供能够通过机器,仪器或肉眼追溯鉴定的标记,签名或代码。 还提供了包括微孔材料的制品和用于制备微孔材料的方法。

Patent Agency Ranking