# US 2019/0168174 A1 · Porous membranes

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- Number: US 2019/0168174 A1
- Document ID: US20190168174A1
- Status: Published application
- Kind: A1
- Application number: 16/324,056
- Filed: 2017-08-07
- Published: 2019-06-06
- Earliest claimed: 2016-08-09
- Assignees: Solvay Specialty Polymers Italy S.P.A.
- Applicants: Solvay Specialty Polymers Italy S.P.A.
- Inventors: Emanuele DI NICOLO'; Silvia Rita PETRICCI; Pasquale CAMPANELLI; Lionel DE BEAUFFORT
- Web page: https://patentgrep.com/patent/US20190168174A1

## CPC

- B01D 71/54: Polyureas; Polyurethanes
- B01D 53/228: {characterised by specific membranes}
- B01D 67/00111: {Polymer pretreatment in the casting solutions}
- B01D 67/00165: {Composition of the coagulation baths}
- B01D 69/02: characterised by their properties
- B01D 69/06: Flat membranes
- B01D 71/5211: {Polyethylene glycol or polyethyleneoxide}
- B01D 71/80: Block polymers
- B01D 71/82: characterised by the presence of specified groups, e.g. introduced by chemical after-treatment
- C08G 18/222: {metal compounds not provided for in groups C08G18/225 - C08G18/26}
- C08G 18/3206: {aliphatic}
- C08G 18/4018: {Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48}
- C08G 18/4277: {Caprolactone and/or substituted caprolactone}
- C08G 18/5015: {having fluorine atoms}
- C08G 18/6674: {with compounds of group C08G18/3203}
- C08G 18/7671: {containing only one alkylene bisphenyl group}
- C08L 75/04: Polyurethanes
- C09D 7/20: Diluents or solvents
- C09D 175/04: Polyurethanes
- C09D 175/08: from polyethers
- B01D 2325/0283: Pore size
- B01D 2325/24: Mechanical properties, e.g. strength
- B01D 2325/38: Hydrophobic membranes
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)

## Abstract

The present invention relates to a porous membrane, process for the manufacture thereof and uses thereof.

## Claims

### Claim 1

A porous membrane comprising at least one layer obtained from a composition (C), said composition (C) comprising:
at least one F-TPU polymer, wherein said F-TPU polymer is a fluorinated polyurethane, polymer comprising recurring units derived from:
optionally, at least one monomer (a), wherein monomer (a) is a diol selected from the group consisting of poly-ether type diols, poly-ester type diols, polybutadien-diols and polycarbonate-diols;
at least one monomer (b), wherein monomer (b) is a hydroxy-terminated (per)fluoropolyether polymer;
at least one monomer (c), wherein monomer (c) is an aromatic, aliphatic or cycloaliphatic diisocyanate; and
at least one monomer (d), wherein monomer (d) is an aliphatic, cycloaliphatic or aromatic diol having from 1 to 14 carbon atoms; and
optionally at least one further ingredient.

### Claim 2 (depends on 1)

The porous membrane according to claim 1, wherein said membrane has an average pore diameter of at least 0.001 μm and of at most 50 μm.

### Claim 3 (depends on 1)

The porous membrane according to claim 1, wherein said optional at least one monomer (a) is selected from the group consisting of poly(ethylene)glycol, poly(propylene)glycol, poly(tetramethylen)glycol (PTMG), poly(1,4-butanediol) adipate, poly(ethandiol-1,4-butanedio) adipate, poly(1,6-hexandiol-neopentyl) glycol adipate, poly-caprolactone-diol (PCL) and polycarbonate-diol.

### Claim 4 (depends on 1)

The porous membrane according to claim 1, wherein said at least one monomer (b) is a hydroxy-terminated (per)fluoropolyether polymer comprising a (per)fluoropolyoxyalkylene chain (Rpf) having two chain ends, wherein one or both chain ends terminates with at least one —OH group.

### Claim 5 (depends on 1)

The porous membrane according to claim 1, wherein said at least one monomer (c) is selected from the group consisting of 4,4′-methylene-diphenylene-diisocyanate (MDI), 1,6-hexan-diisocyanate (HDI), 2,4-toluene-diisocyanate, 2,6-toluene-diisocyanate, xylilen-diisocyanate, naphthalene-diisocyanate, paraphenylen-diisocyanate, hexamaethylen-diisocyanate, isophorone-diisocyanate, 4,4′-dicyclohexyl-methane-diisocyanate and cyclohexyl-1,4-diisocyanate.

### Claim 6 (depends on 1)

The porous membrane according to claim 1, wherein said at least one monomer (d) is selected from the group consisting of ethylene-glycol, 1,4-butanediol (BDO), 1,6-hexane diol (HDO), N,N-diethanolamine and N,N-diisopropanolaniline.

### Claim 7 (depends on 1)

A process for manufacturing the porous membrane according to claim 1, said process comprising:
processing a composition (C) thereby providing a film, wherein composition (C) comprises:
at least one F-TPU polymer, wherein said F-TPU polymer is a fluorinated polyurethane polymer comprising recurring units derived from:
optionally, at least one monomer (a), wherein monomer (a) is a diol selected from the group consisting of poly-ether type diols, poly-ester type diols, polybutadien-diols and polycarbonate-diols;
at least one monomer (b), wherein monomer (b) is a hydroxy-terminated (per)fluoropolyether polymer;
at least one monomer (c), wherein monomer (c) is an aromatic, aliphatic or cycloaliphatic diisocyanate; and
at least one monomer (d), wherein monomer (d) is an aliphatic, cycloaliphatic or aromatic diol having from 1 to 14 carbon atoms; and
optionally at least one further ingredient;
and
processing the film thereby providing a porous membrane.

### Claim 8 (depends on 1)

A method for filtering a liquid phase and/or a gas phase comprising one or more solid contaminants, said method comprising contacting said liquid phase and/or gas phase comprising one or more solid contaminants with at least one porous membrane as defined in claim 1.

### Claim 9 (depends on 8)

The method according to claim 8, wherein said solid contaminants are microorganisms selected from the group consisting of bacteria, algae, fungi, protozoa and viruses.

### Claim 10 (depends on 8)

The method according to claim 8, wherein said porous membrane has an average pore diameter of at least 0.001 μm and of at most 5 μm.

### Claim 11 (depends on 8)

The method according to claim 8, wherein said porous membrane has an average pore diameter of at least 5 μm and of at most 50 μm.

### Claim 12 (depends on 1)

A fabric comprising at least two layers, wherein at least one layer comprises a porous membrane as defined in claim 1.

### Claim 13 (depends on 12)

The fabric according to claim 12, wherein said porous membrane has an average pore diameter of at least 0.001 μm and of at most 5 μm.

### Claim 14

A liquid composition (CL) comprising at least one F-TPU polymer and at least one polar aprotic solvent, wherein said F-TPU polymer is a fluorinated polyurethane polymer comprising recurring units derived from:
optionally, at least one monomer (a), wherein monomer (a) is a diol selected from the group consisting of poly-ether type diols, poly-ester type diols, polybutadien-diols and polycarbonate-diols;
at least one monomer (b), wherein monomer (b) is a hydroxy-terminated (per)fluoropolyether polymer;
at least one monomer (c), wherein monomer (c) is an aromatic, aliphatic or cycloaliphatic diisocyanate; and
at least one monomer (d), wherein monomer (d) is an aliphatic, cycloaliphatic or aromatic diol having from 1 to 14 carbon atoms.

### Claim 15 (depends on 14)

The liquid composition according to claim 14, wherein said at least one polar aprotic solvent is selected from the group consisting of: N-methyl-pyrrolidone (NMP), dimethyl acetamide (DMAc), dimethylformamide (DMF), dimethylsulfoxide (DMSO), tetrahydrofuran (THF), methyl-5-dimethylamino-2-methyl-5-oxopentanoate and triethylphosphate (TEP).