The invention pertains to a polyaryl ether sulfone polymer solution [solution (SP)] comprising: —at least one sulfone polymer [polymer (PSI)] having recurring units, wherein more than 50% moles, with respect to all the recurring units of polymer (PSI), are recurring units (R.sub.PSI) selected from the group consisting of those of formulae (R.sub.PSI-1) and (R.sub.PSI-2) herein below: (R.sub.PSI-1) (R.sub.PSI-2) wherein: —each of E′, equal to or different from each other and at each occurrence, is selected from the group consisting of those of formulae (E′-1) to (E′-3): (E′-I) (E′-II) (E′-III) —each R′ is independently selected from the group consisting of halogen, alkyl, alkenyl, alkynyl, aryl, ether, thioether, carboxylic acid, ester, amide, imide, alkali or alkaline earth metal sulfonate, alkyl sulfonate, alkali or alkaline earth metal phosphonate, alkyl phosphonate, amine and quaternary ammonium; and —j′ is zero or an integer of 1 to 4; is a bond or a divalent group optionally comprising one or more than one heteroatom; preferably T is selected from the group consisting of a bond, —CH.sub.2—, —C(O)—, —C(CH.sub.3).sub.2—, —C(CF.sub.3).sub.2—, —C(═CCI.sub.2)—, —C(CH.sub.3)(CH.sub.2CH.sub.2—COOH)—, and a group of formula: (A) —at least one polar organic solvent [solvent (S)]; and —at least one mixture of polyhydroxyl aliphatic alcohols having from 1 to 6 carbon atoms or derivatives thereof [mixture (PHA)], said mixture (PHA) comprising at least one ethylene glycol compound [compound (EthyGly)] and at least one glycerol compound [compound (Gly)], to its use for manufacturing membranes, and to membranes obtained therefrom. ##STR00001##

The present invention provides highly permeable and porous polybenzimidazole membranes, methods of making them, and their application as a high-performance membrane support for gas separation composite membranes. The polybenzimidazole membranes are bonded to a fabric substrate.

The present application relates to an unsupported, permanently hydrophilic filtration membrane, and its method of formation. The membrane comprises a polymeric matrix material and a cross-linked polyoxazoline hydrophilic additive blended throughout said matrix material.

The present application relates to a multizone, unsupported, microporous, high throughput membrane. The membrane includes a first microporous zone, a second microporous zone, and a third microporous zone, where the third microporous zone is positioned between the first and second microporous zones, with the first, second, and third microporous zones being integral with one another. Further aspects of the present application include a process for making the membrane and a filtration cartridge with the membrane of the present application.

A piece of substrate material is formed under heat and pressure by a roller against a cavity or platen into a shaped substrate sheet having one or more depressions. Two substrate sheets are bonded together to form a substrate wherein the one or more depressions form one or more interior channels. The substrate is coated with a dope in a casting device having a guide portion corresponding to the shape of the substrate sheets and quenched to form a filtering membrane.

A method for manufacturing of porous polymer structures, in particular membranes, the method comprising the steps of providing a mixture of one or more polymers and one or more salt nano- and/or microparticles, primary shaping said blend, and removing said one or more salt particles, wherein at least part of the one or more salt nano- and/or microparticles is one or more solid acids, and whereby the ratio of polymer-to-particle is in the range of 3:1 to 1:10 by weight. Also provided are mixtures suitable to obtain such porous polymer structures, porous polymer structures as described herein, shaped articles containing such structures, and the use of such porous polymer structures, shaped articles and mixtures.

The invention relates to a mechanically stable ultrafiltration membrane and to a method for producing such an ultrafiltration membrane.

The present disclosure relates to synthesis of porous polymer networks and applications of such materials. The present disclosure relates to a method of fabricating of a porous polymer network comprising: (a) providing: (i) a first reactant comprising a plurality of compounds comprising at least one acetyl group, said plurality of compounds comprising at least one compound type, and (ii) a second reactant comprising an alkylsulfonic acid, and (b) creating a solution of said reactants, (c) casting said solution in a form, and (d) treating said solution under such conditions so as to produce a porous polymer network. In one embodiment, the invention relates to a porous polymer network which has a basic structure selected from the group consisting of ##STR00001##

In summary, the disclosure provides certain membranes useful as filter materials in the removal of metal ions, metal particulates, and/or organic contaminants from liquid compositions, in particular liquid compositions used in the microelectronic device industry. The membranes of the disclosure are porous membranes comprised of poly(quinoline) polymers. Advantageously, the poly(quinoline) membranes are thermally stable and hydrolytically stable and can thus be cleaned between uses using acidic material such as dilute hydrochloric acid, without suffering from significant degradation. The poly(quinoline) polymers can be designed to be soluble in certain solvents, thus enabling the manufacture of the corresponding porous membranes by immersion-casting techniques.

The present invention relates to a method for producing a porous monolayer polymer membrane, to a porous monolayer polymer membrane, and to the use of the polymer membrane for filtration.