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公开(公告)号：US4702947A
公开(公告)日：1987-10-27
申请号：US846803
申请日：1986-04-01
CPC分类号： D04H1/56 , D04H1/587 , D04H1/64 , Y10S261/72 , Y10S428/903 , Y10T428/1372 , Y10T442/614
摘要： Polymeric microfibrous structures comprised of normally hydrophobic microfibers coated with a cured, precipitated, cationic, thermosetting binder resin or polymer and characterized by being hydrophilic and having a positive zeta potential with enhanced capability for the removal of negatively-charged particulate material in a fluid medium are prepared by a process comprising the steps:(1) combining in a controlled manner a first solution of a water-soluble, non-colloidal, cationic, thermosetting binder resin or polymer and a second solution or dispersion of a precipitating agent to form a stable emulsion or suspension;(2) impregnating the microfibrous structure of normally hydrophobic microfibers with the stable emulsion or suspension to form a fibrous structure wetted with the stable emulsion or suspension; and(3) drying the wetted microfibrous structure and curing the binder resin or polymer.
摘要翻译： 聚合物微纤维结构包括用固化，沉淀，阳离子，热固性粘合剂树脂或聚合物涂覆的通常疏水的微纤维，其特征在于亲水性并具有增强的在流体介质中去除带负电荷的颗粒材料的能力的正ζ电位， 通过包括以下步骤的方法制备：（1）以受控的方式组合水溶性非胶体阳离子热固性粘合剂树脂或聚合物的第一溶液和沉淀剂的第二溶液或分散体以形成稳定的 乳液或悬浮液; （2）用稳定的乳液或悬浮液浸渍通常疏水的微纤维的微纤维结构，以形成用稳定的乳液或悬浮液润湿的纤维结构; 和（3）干燥湿润的微纤维结构并固化粘合剂树脂或聚合物。
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公开(公告)号：US4617124A
公开(公告)日：1986-10-14
申请号：US397762
申请日：1982-07-13
申请人： David B. Pall , Peter J. Degen , Thomas C. Gsell
发明人： David B. Pall , Peter J. Degen , Thomas C. Gsell
IPC分类号： A61L2/02 , B01D39/08 , B01D39/16 , C02F1/28 , D06M15/00 , D06M101/00 , D06M101/16 , B01D13/00
CPC分类号： C02F1/285 , A61L2/022 , B01D39/163 , B01D2239/04 , B01D2239/0421 , B01D2239/0471 , B01D2239/08 , B01D2239/10 , B01D2239/1216 , B01D2239/1233 , B01D2239/1291
摘要： Microfibrous, polymeric filter sheets and filter elements prepared therefrom comprised of a normally hydrophobic, microfibrous, polymeric web, wherein the surfaces of the microfibers making up the web are coated with a cured, precipitated, cationic, thermosetting binder resin or polymer. The filter sheet is further characterized by being hydrophilic and having a positive zeta potential.The process for preparing such filter sheets comprises four steps:(1) applying a first solution or dispersion of a precipitating agent to a hydrophobic web to at least partially wet the web;(2) applying a second solution of the binder resin or polymer to the wetted web of step (1);(3) working the wetted web of step (2) to mix the first and second solutions, thereby facilitating the precipitation of the binder resin or polymer and the distribution of the precipitated binder resin or polymer as a coating on the surface of the microfibers making up the worked web; and(4) drying and curing the coated web of step (3) to form the desired filter sheets.The filter sheets have enhanced mechanical strength, are hydrophilic, have positive zeta potentials over the pH range of from about 3 to about 10 and typically have absolute pore ratings of from about 0.5 to about 80 micrometers.
摘要翻译： 微纤维，聚合物过滤片和由其制备的过滤元件由通常疏水的微纤维聚合物纤维网组成，其中构成网的微纤维的表面涂覆有固化的，沉淀的阳离子型热固性粘合剂树脂或聚合物。 该滤纸的特征还在于亲水性并具有正的ζ电位。 制备这种过滤片的方法包括四个步骤：（1）将沉淀剂的第一溶液或分散体施加到疏水性网状物上以至少部分地润湿网; （2）将粘合剂树脂或聚合物的第二溶液施加到步骤（1）的润湿网上; （3）加工步骤（2）的湿纸幅以混合第一和第二溶液，从而促进粘合剂树脂或聚合物的沉淀和沉淀的粘合剂树脂或聚合物作为涂层在微细纤维表面上的分布 上网; 和（4）干燥和固化步骤（3）的涂布网以形成所需的过滤片。 过滤片具有增强的机械强度，亲水性，在约3至约10的pH范围内具有正ζ电位，并且通常具有约0.5至约80微米的绝对孔径。
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公开(公告)号：US4861617A
公开(公告)日：1989-08-29
申请号：US075658
申请日：1987-07-20
CPC分类号： A61M5/36 , A61L29/085
摘要： A method of reducing the adhesion of bubbles to the surfaces of a medical administration set with which a parenteral liquid comes in contact prior to its introduction into a patient by treating the surfaces of the medical administration set with which the liquid comes in contact to increase the critical surface tension thereof prior to contacting the surfaces of the medical administration set with the liquid, preferably by radiation grafting with a solution of a monofunctional monomer compound.
摘要翻译： 通过对与液体接触的医疗管理装置的表面进行处理而将气泡粘附到肠胃外液体在其被引入患者体内之前与其接触的医疗管理装置的表面的方法， 在将药物给药装置的表面与液体接触之前，优选通过用单官能单体化合物的溶液进行辐射接枝之前，其临界表面张力。
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公开(公告)号：US4734208A
公开(公告)日：1988-03-29
申请号：US716970
申请日：1985-03-28
CPC分类号： B01D39/2024 , B01D2239/0471
摘要： Filter media comprised of charge modified, resin coated inorganic microfibers are prepared by mixing inorganic microfibers with an aqueous solution of a water soluble, noncolloidal cationic thermosetting binder resin to form a dispersion, following which a precipitating agent is added to precipitate the binder resin and coat the microfibers. The coated microfibers may be used in the dispersed or suspended form as a filter aid. Preferably they are formed into a filter sheet which is then dried and cured to form a filter sheet of narrowly distributed pore size, pore sizes as small as one-half micron, and having a positive zeta potential in alkaline media. Glass is the preferred microfiber and polyamine-epichlorohydrins the preferred resins. By providing the normally negative zeta potential microfibers with a positive zeta potential the binder resins used to coat the microfibers substantially enhance particulate removal capabilities of the microfiber filter sheet.
摘要翻译： 通过将无机微纤维与水溶性非胶体阳离子热固性粘合剂树脂的水溶液混合以形成分散体来制备由电荷改性的树脂涂覆的无机微纤维组成的过滤介质，形成分散体，随后加入沉淀剂以沉淀粘合剂树脂和涂层 微纤维。 涂覆的微纤维可以以分散或悬浮形式用作助滤剂。 优选地，它们被形成为过滤片，然后将其干燥和固化以形成窄分布孔径，孔径小至半微米，并且在碱性介质中具有正ζ电位的滤片。 玻璃是优选的超细纤维，多胺 - 表氯醇是优选的树脂。 通过提供具有正ζ电位的正负ζ电位微纤维，用于涂覆微纤维的粘合剂树脂基本上增强了微纤维过滤片的微粒去除能力。
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公开(公告)号：US4523995A
公开(公告)日：1985-06-18
申请号：US312723
申请日：1981-10-19
CPC分类号： B01D39/2024 , B01D2239/0471
摘要： Filter media comprised of charge modified, resin coated inorganic microfibers are prepared by mixing inorganic microfibers with an aqueous solution of a water soluble, noncolloidal cationic thermosetting binder resin to form a dispersion, following which a precipitating agent is added to precipitate the binder resin and coat the microfibers. The coated microfibers may be used in the dispersed or suspended form as a filter aid. Preferably they are formed into a filter sheet which is then dried and cured to form a filter sheet of narrowly distributed pore size, pore sizes as small as one-half micron, and having a positive zeta potential in alkaline media. Glass is the preferred microfiber and polyamine-epichlorohydrins the preferred resins. By providing the normally negative zeta potential microfibers with a positive zeta potential the binder resins used to coat the microfibers substantially enhance particulate removal capabilities of the microfiber filter sheet.
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公开(公告)号：US4826642A
公开(公告)日：1989-05-02
申请号：US203821
申请日：1988-06-08
申请人： Peter J. Degen , Thomas C. Gsell
发明人： Peter J. Degen , Thomas C. Gsell
CPC分类号： A41D31/02 , B01D69/10 , Y10S264/48 , Y10S264/62 , Y10S264/75
摘要： A supported microporous membrane comprising a composite of a microporous membrane and a synthetic thermoplastic web of microfibers secured to the membrane without the use of added adhesive components and having an ASTM D903 peel strength of at least about 2 grams per centimeter, the composite having a modulus of flexure at leasts 10 percent greater than that of the membrane, and the method of manufacturing such supported membranes by contacting thermplastic microfibers with the membrane while the microfibers are at an elevated temperature.
摘要翻译： 支撑的微多孔膜，其包括微孔膜和合成的纤维的合成热塑性纤维网的复合材料，其固定到膜上，而不使用添加的粘合剂组分，并且具有至少约2克/厘米的ASTM D903剥离强度，所述复合材料具有模量 的挠曲比膜的至少10％，以及当微纤维处于升高的温度时通过使热塑性微纤维与膜接触来制造这种支撑膜的方法。
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公开(公告)号：US5128041A
公开(公告)日：1992-07-07
申请号：US700252
申请日：1991-05-15
CPC分类号： B01D67/0093 , C08J7/18 , B01D2323/385 , C08J2377/00
摘要： Microporous membranes having positive zeta potentials in alkaline pH are provided by radiation grafting diallyldimenthylammonium dimethyl ammonium chloride to the surraces of a microporous, polyamide membrane using ionizing radiation. The membranes have particular use in microelectronics manufacture where quick rinse up times with ultrapure water are required.
摘要翻译： 在碱性pH下具有正ζ电位的微孔膜通过使用电离辐射将二甲基氯化铵二氯化二铵氯化铵辐射接枝到微孔聚酰胺膜的外部来提供。 该膜在微电子制造中特别有用，需要使用超纯水进行快速冲洗。
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公开(公告)号：US4707266A
公开(公告)日：1987-11-17
申请号：US850061
申请日：1986-04-07
CPC分类号： C12N11/08 , B01D67/0009 , B01D67/0011 , B01D71/56 , B01D2323/12 , B01D2325/34
摘要： Surface modified, skinless, hydrophilic, microporous, polyamide membranes with controlled surface properties are prepared by the steps of preparing a casting solution comprised of (A) a casting resin system comprised of (a) an alcohol-insoluble polyamide resin, and (b) a water-soluble membrane surface modifying polymer having functional polar groups and a molecular weight of 10,000 or greater, and (B) a solvent system in which the casting resin system is soluble; inducing nucleation of the casting solution by controlled addition of a nonsolvent for the casting resin system under controlled conditions to obtain a visible precipitate of casting resin system particles, thereby forming a casting composition; spreading the casting composition on a substrate to form a thin film; contacting and diluting the film of the casting composition with a liquid nonsolvent system for the casting resin system, thereby precipitating the casting resin system from the casting composition in the form of a thin, skinless, hydrophilic, surface modified, microporous, polyamide membrane; and washing and drying the membrane. The membranes of this invention are characterized by having fine pore ratings, the surface properties thereof being substantially controlled by functional polar groups of a membrane surface modifying polymer and having the capability, through the functional polar groups of the modifying polymer, of reacting or interacting with particulates and/or nonparticulates in a fluid.
摘要翻译： 具有受控表面特性的表面改性，无皮，亲水，微孔，聚酰胺膜是通过以下步骤制备的：制备由（A）由（a）不溶于醇的聚酰胺树脂组成的浇注树脂体系和（b） 具有官能极性基团和分子量为10,000以上的水溶性膜表面改性聚合物，和（B）可溶解浇铸树脂体系的溶剂体系; 通过在受控条件下通过控制加入铸造树脂体系的非溶剂来获得铸塑溶液的成核，从而获得铸塑树脂体系颗粒的可见沉淀物，由此形成铸塑组合物; 将浇铸组合物铺展在基材上以形成薄膜; 用流延树脂体系的液体非溶剂体系对铸塑组合物的膜进行接触和稀释，从而使铸塑组合物以薄的，无皮的，亲水的，表面改性的，微孔的聚酰胺膜的形式沉淀; 并洗涤和干燥膜。 本发明的膜的特征在于具有细孔等级，其表面性质基本上由膜表面改性聚合物的官能极性基团控制，并且具有通过改性聚合物的官能极性基团反应或与 流体中的颗粒和/或非颗粒物。
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公开(公告)号：US4493756A
公开(公告)日：1985-01-15
申请号：US506364
申请日：1983-06-21
申请人： Peter J. Degen , Thomas C. Gsell
发明人： Peter J. Degen , Thomas C. Gsell
摘要： A process for cleaning porous metal filters, particularly stainless steel filters, comprising the steps of:(1) electrolyzing the filter in an electrolyte bath using the filter as one of the electrodes, preferably as the cathode of the electrolytic system, and subjecting the system to an imposed or applied current, highly preferably a DC current; and(2) rinsing the filter to remove electrolytic solution from the filter and flush any residual contaminants from the filter.When organic material is to be removed, a baking step prior to the electrolysis step is used.
摘要翻译： 一种用于清洗多孔金属过滤器，特别是不锈钢过滤器的方法，包括以下步骤：（1）使用过滤器作为电极之一，优选作为电解系统的阴极，在电解质浴中电解过滤器，并使系统 施加或施加电流，高度优选DC电流; 和（2）冲洗过滤器以从过滤器中除去电解液并冲洗过滤器中的任何残留污染物。 当要除去有机材料时，使用在电解步骤之前的烘烤步骤。
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公开(公告)号：US5232600A
公开(公告)日：1993-08-03
申请号：US965538
申请日：1992-10-23
申请人： Peter J. Degen , Isaac Rothman , Thomas C. Gsell
发明人： Peter J. Degen , Isaac Rothman , Thomas C. Gsell
CPC分类号： B01D67/0093 , B01D19/0031 , C08J9/405
摘要： A process for the preparation of a microporous polymeric membrane is provided which includes polymerizing a polymerizable fluorine-containing monomer in the presence of a microporous polymeric membrane substrate such that the fluorine-containing monomer forms a polymeric superstrate that is permanently chemically bonded to all surfaces of the membrane. A device is also provided for processing fluids which incorporates a microporous polymeric membrane having a CWST of less than about 28 dynes/cm and includes a microporous polymeric membrane substrate formed from a material such as a fluoropolymer and, permanently chemically bonded to all portions of the surface thereof is a superstrate, which may be a polymer or copolymer derived from a monomer(s), having an ethylenically unsaturated group and a perfluoroalkyl group. A gas filtration/drying process, a method of venting a gas from a vessel and a method of separating a gas from a liquid in a gas/liquid mixture using a microporous polymeric membrane having a CWST less than about 28 dynes/cm which includes a microporous polymeric membrane substrate and a superstrate fluoropolymer permanently chemically bonded to all portions of the membrane substrate are also provided.
摘要翻译： 提供了一种用于制备微孔聚合物膜的方法，其包括在微孔聚合物膜基材存在下聚合可聚合的含氟单体，使得含氟单体形成聚合物上层，该聚合物顶层永久化学键合到 膜。 还提供了一种用于处理流体的装置，该流体包含CWST小于约28达因/厘米的微孔聚合物膜，并且包括由诸如氟聚合物的材料形成的微孔聚合物膜基材，并且永久化学键合到 其表面是覆盖物，其可以是衍生自具有烯属不饱和基团和全氟烷基的单体的聚合物或共聚物。 气体过滤/干燥方法，从容器排出气体的方法以及使用具有CWST小于约28达因/厘米的微孔聚合物膜将气体与气体/液体混合物中的液体分离的方法，其包括 还提供了微孔聚合物膜基材和永久化学键合到膜基材的所有部分的底层含氟聚合物。
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