Dense star polymers for calibrating/characterizing sub-micron apertures
    7.
    发明授权
    Dense star polymers for calibrating/characterizing sub-micron apertures 失效
    用于校准/表征亚微米孔径的密集聚合物

    公开(公告)号:US4713975A

    公开(公告)日:1987-12-22

    申请号:US868979

    申请日:1986-05-30

    摘要: In a substance such as a membrane, a cell or virus having at least one aperture of a diameter of about 10,000 Angstroms or less, a process for measuring and characterizing the diameter of the aperture, comprising:(a) contacting the substance with a solution of a plurality of dense star polymers;(b) passing through or into the aperture at least one dense star polymer having a molecular diameter of about equal to or less than the diameter of the aperture; and(c) calculating the diameter of the aperture from measurements of either those dense star polymers passing therethrough or thereinto the aperture, of those dense star polymers not passing therethrough or thereinto, or of the combined measurements of those dense star polymers passing therethrough or thereinto the aperture and those not passing therethrough or thereinto.

    摘要翻译: 在诸如膜,细胞或病毒的物质中,具有至少一个直径为约10,000埃或更小的孔径,用于测量和表征孔直径的方法,包括:(a)将物质与溶液接触 的多个致密星形聚合物; (b)穿过或穿过所述孔的至少一种致密星形聚合物,其具有等于或小于所述孔直径的分子直径; 以及(c)从通过其中的那些致密星形聚合物或其中没有通过其中的那些致密星形聚合物的孔的测量结果或通过其中的那些致密星形聚合物的组合测量来计算孔径的直径 孔和那些不通过其中的孔。

    Ammonium polyamidoamines
    8.
    发明授权
    Ammonium polyamidoamines 失效
    铵聚酰胺胺

    公开(公告)号:US4416729A

    公开(公告)日:1983-11-22

    申请号:US336538

    申请日:1982-01-04

    摘要: Wet strength of paper is effectively increased by contacting paper pulp with an ammonium polyamidoamine having cross-linking functionality such as epoxy or azetidinium and subjecting a wet sheet of such pulp to conditions sufficient to cure the polyamidoamine.

    摘要翻译: 通过使纸浆与具有交联官能团的聚酰胺胺(例如环氧树脂或氮杂环丁烷鎓)接触并使这种纸浆的湿片材足以固化聚酰胺胺的条件来有效地提高纸的湿强度。

    Superabsorbent polymers having a slow rate of absorption
    9.
    发明授权
    Superabsorbent polymers having a slow rate of absorption 有权
    具有缓慢吸收速率的超吸收性聚合物

    公开(公告)号:US06716929B2

    公开(公告)日:2004-04-06

    申请号:US10189136

    申请日:2002-07-03

    申请人: Larry R. Wilson

    发明人: Larry R. Wilson

    IPC分类号: C08F844

    摘要: Superabsorbent polymers having a slow rate of absorption, and a process for their preparation. The superabsorbent polymer has a slow rate of absorption, is crosslinked with a covalent crosslinking agent and the metal of a polyvalent metal coordination compound, has the metal of the coordination compound distributed essentially homogeneously throughout the polymer, and has an Absorption Rate Index of at least about 5 minutes.

    摘要翻译: 吸收速度慢的超吸收性聚合物及其制备方法。 超吸收性聚合物具有缓慢的吸收速率,与共价交联剂和多价金属配位化合物的金属交联,使配位化合物的金属基本上均匀地分布在整个聚合物中,并且具有至少的吸收率指数 约5分钟。