Solvay Specialty Polymers Italy S.p.a.

Solvay Specialty Polymers USA, LLC

Emanuele Di Nicolo′

Marco Avataneo

Serena Carella

Aldo Sanguineti

Young Moo Lee

Narmandakh Taylor

Enrico Drioli

Andrea Vittorio Oriani

Pasquale Campanelli

Mirko Mazzola

Suk Young Lee

Zhaoliang Cui

Naser Tavajohi Hassankiadeh

The present invention pertains to an aqueous dispersion of a vinylidene fluoride polymer having a high molecular weight and possessing a substantially linear structure, leading to reduced amount of gels/insoluble fractions, to a method for its preparation and to its use for the manufacture of electrochemical cell components, such as electrodes and/or composite separators or for the manufacture of membranes.

Vinylidene fluoride polymer dispersion

The present invention relates to a porous membrane suitable for use in high pressure filtration method.

Porous membranes for high pressure filtration

The invention pertains to a polyaryl ether sulfone polymer solution [solution (SP)] comprising: &#x2014;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) selected from the group consisting of those of formulae (R-1) and (R-2) herein below: (R-1) (R-2) wherein: &#x2014;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&#x2032;-1) to (E&#x2032;-3): (E&#x2032;-I) (E&#x2032;-II) (E&#x2032;-III) &#x2014;each R&#x2032; 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 &#x2014;j&#x2032; 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, &#x2014;CH&#x2014;, &#x2014;C(O)&#x2014;, &#x2014;C(CH)&#x2014;, &#x2014;C(CF)&#x2014;, &#x2014;C(&#x2550;CCI)&#x2014;, &#x2014;C(CH)(CHCH&#x2014;COOH)&#x2014;, and a group of formula: (A) &#x2014;at least one polar organic solvent [solvent (S)]; and &#x2014;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. 

Composition and method for manufacturing sulfone polymer membrane

The present invention pertains to a process for manufacturing a fluoropolymer membrane, said process comprising the following steps: (i) providing a composition [composition (C)] comprising, preferably consisting of: at least one fluoropolymer [polymer (F)], a water-soluble liquid medium [medium (M)] comprising, preferably consisting of at least one solvent selected from the group consisting of diesters of formula (I-), esteramides of formula (I-) and diamides of formula (I-); R(O&#x2550;)CO-A-OC(&#x2550;O)R(I-) RO(O&#x2550;)C-A-C(&#x2550;O)NRR(I-) RRN(O&#x2550;)C-A-C(&#x2550;O)NRR(I-) wherein: Rand R, equal to or different from each other, are independently selected from the group consisting of C-Chydrocarbon groups; R, R, Rand R, equal to or different from each other, are independently selected from the group consisting of hydrogen, C-Chydrocarbon groups, possibly substituted, being understood that R, R, Rand Rmight be part of a cyclic moiety including the nitrogen atom to which they are bound, said cyclic moiety being possibly substituted and/or possibly comprising one or more than one additional heteroatoms, Ais a C-Cdivalent alkylene group comprising one or more ether oxygen atoms, Aand A, equal to or different from each other, are independently C-Cdivalent alkylene groups, optionally comprising one or more ether oxygen atoms and/or one or more functional side groups; (ii) processing the composition (C) at a temperature of at least 100&#xb0; C. thereby providing a film; (iii) cooling the film provided in step (ii) to a temperature below 50&#xb0; C.; (iv) contacting the film provided in step (iii) with a non-solvent medium [medium (M NS)] thereby providing a fluoropolymer membrane; and (v) optionally, drying the fluoropolymer membrane provided in step (iv).

Process for manufacturing fluoropolymer membranes

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Gorla Minore, Italy

Emanuele Di Nicolo′