Honeywell International Inc.

Centre National De La Recherche Scientifique

Pall Corporation

Gerald Lopez

Bruno Ameduri

Alagappan Thenappan

Noureddine Ajellal

Frédéric Boschet

Hassan Ait-Haddou

Eric J Rainal

Gary Martin

James A Belmont

Eric Rainal

Frederic Boschet

Disclosed are porous membranes including a porous support and a coating comprising a copolymer having monomeric units A and B, and optionally monomeric units C; wherein A is a halogenated vinyl monomer other than tetrafluoroethylene, a halogenated alkyl vinyl ether, or an alkene of the formula CH, wherein n is 1-6; B is a perfluoro (alkyl vinyl)ether compound, a perfluoroalkyl vinyl compound, or a perfluoro alkoxyalkyl vinyl ether compound, each compound having one or more sulfonic acid groups or a salt thereof, one or more sulfonyl fluoride groups, one or more sulfonamide groups, or one or more sulfonate ester groups, and C is vinylidene fluoride. Also disclosed are methods of preparing such porous membranes and methods of treating fluids by the use of these membranes.

Porous membrane having a fluorinated copolymer as surface treatment

Disclosed is a copolymer film that includes a first comonomer including a chlorofluoro olefin and a second comonomer that is selected from the group consisting of itaconic acid, 2,3-dihydropyran, D-glucal, glycerine carbonate vinyl ether, 2-hydroxypropyl acrylate, maleic anhydride, vinylidene chloride, and mixtures thereof.

Fluoropolymers containing a copolymerized fluoromonomer and a functional hydrocarbon comonomer and articles made from such fluoropolymers

A polymeric molecule having the formula: X&#x2014;[C(A)C(B)(B')]-Q[CY&#x2550;C(Z)(Z&#x2032;)] or [C(A)=C(B)]-Q[C(Y)(Y&#x2032;)&#x2014;C(Z)(Z&#x2032;)]&#x2014;X&#x2032;, wherein A is either H or F; B and B&#x2032; are either H, F, or Cl, and are not necessarily the same; X and X&#x2032; are Br, Cl or I (and are not necessarily the same); Y and Y&#x2032; are F, Br, Cl or I (and are not necessarily the same); and wherein Z and Z&#x2032; are F, Br, Cl or I (and are not necessarily the same); Q is optional and is either oxygen (O) or sulfur (S); and n is at least 1.

Process, properties, and applications of graft copolymers

Methods for the synthesis of CTFE-based block copolymers through iodine transfer polymerization are disclosed. In an exemplary embodiment, a method includes reacting a fluoromonomer 'M' with a chain transfer agent of the formula X&#x2014;Y or Y&#x2014;X&#x2014;Y, wherein X represents a C-Chydrocarbon, a C-Chydrofluorocarbon, C-Chydrochlorofluorocarbon, or C-Cfluorocarbon and Y represents iodine or bromine, in the presence of a radical initiator, to form a macro-initiator of the formula: X-poly(M)-Y or Y-poly(M)-X-poly(M)-Y, wherein poly(M) represents a polymer of the fluoromonomer. The method further includes reacting the macro-initiator with chlorotrifluoroethylene (CTFE) in the presence of a radical initiator to form a diblock or a triblock CTFE-based block copolymer of the formula: X-poly(M)-block-poly(CTFE) or PCTFE-block-poly(M)-X-poly(M)-block-PCTFE.

Synthesis of chlorotrifluoroethylene-based block copolymers by iodine transfer polymerization

Fluorinated macromonomers, a PCTFE-g-poly(M) graft copolymer, and moisture barrier films and articles formed therefrom are provided. The PCTFE-g-poly(M) graft copolymers have a PCTFE backbone component and a plurality of pendant groups attached to the PCTFE backbone component.

Growing community of inventors

Lunel-Viel, France

Gerald Lopez