Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
  • C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B1/00—Layered products having a non-planar shape
  • B32B1/08—Tubular products
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/02—Layer formed of wires, e.g. mesh
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
  • B32B15/082—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising vinyl resins; comprising acrylic resins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
  • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
  • B32B15/088—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyamides
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
  • B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
  • B32B27/285—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyethers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
  • B32B27/286—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysulphones; polysulfides
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
  • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
  • B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
  • C08G69/40—Polyamides containing oxygen in the form of ether groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
  • C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
  • E21B17/20—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L11/00—Hoses, i.e. flexible pipes
  • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
  • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
  • F16L11/081—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire
  • F16L11/082—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire two layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2250/00—Layers arrangement
  • B32B2250/05—5 or more layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2274/00—Thermoplastic elastomer material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
  • B32B2307/54—Yield strength; Tensile strength
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
  • B32B2307/546—Flexural strength; Flexion stiffness
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/724—Permeability to gases, adsorption
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2597/00—Tubular articles, e.g. hoses, pipes

Definitions

• the present invention therefore aims to find an alternative way to limit the risk of corrosion of these flexible pipes.
• FIG. 3 represents a device for measuring the CO2 permeability of a film.
• the invention therefore relates to an outer sheath of offshore hose comprising at least one block copolymer comprising at least one polyamide rigid block and at least one flexible block.
• the polyamide rigid block cocolymer PA and flexible blocks thus defined according to the invention is one of the elastomeric thermoplastic polymers.
• thermoplastic elastomer polymer refers to a polymer which constitutes a multiphase material having at least two transitions, namely a first transition at a temperature T1 (generally it is the glass transition temperature) and a second transition at a temperature T2 greater than T1 (usually this is the melting point). At a temperature below T1, the material is rigid, between T1 and T2 it has an elastic behavior, and above T2 it is melted.
• TPE thermoplastic elastomer polymer
• said flexible block comprises at least one polyether PE, preferably selected from PTMG, PPG, PO3G and / or PEG, preferably at least one PPG.
• n represents the number of repeating units of the -BD-BM- unit of said copolymer n is in the range of 1 to 60, preferably 5 to 30, more preferably 6 to 20.
• the number average molecular (or molar) mass is set by the chain limiter content. It can be calculated according to the relation:
• dicarboxylic acids examples include 1,4-cyclohexyldicarboxylic acid, butanedioic, adipic, azelaic, suberic, sebacic, dodecanedicarboxylic, octadecanedicarboxylic acids and terephthalic and isophthalic acids, but also dimerized fatty acids. .
• polyamide PA blocks are prepared by polycondensation:
• the dicarboxylic acid having Y carbon atoms which is introduced in excess with respect to the stoichiometry of the diamine or diamines, is used as chain limiter.
• the polymer comprises from 1 to 80% by weight of flexible blocks and from 20 to 99% by weight of polyamide blocks, preferably from 4 to 80% by weight of flexible blocks and from 20 to 96% by weight of polyamide blocks.
• the rigid polyamide block in the rigid block copolymer PA and flexible blocks according to the invention comprises at least one of the following polyamide units: 1 1, 12, 6, 610, 612, 1010, 1012, and mixtures or copolyamides thereof.
• the polyether blocks may also consist of ethoxylated primary amines.
• ethoxylated primary amines mention may be made of the products of formula:
• the polyetherdiol blocks whether used as such and copolycondensed with polyamide blocks having carboxylic ends, or aminated to be converted into polyether diamines and condensed with polyamide blocks having carboxylic ends, the general method for the two-stage preparation of the copolymers PEBA is substantially the same, and form bonds respectively ester and amide between PA blocks and PE blocks. This method is known and described, for example, in French patent FR2846332.
• the general method for preparing the PEBA copolymers of the invention having amide linkages between the PA blocks and the PE blocks is known and described, for example in the European patent EP148201 1.
• the polyether blocks can also be mixed with polyamide precursors and a diacid chain limiter to make the polyamide block and polyether block polymers having statistically distributed patterns (one-step process).
• PEBA designation in the present description of the invention relates as well to Pebax® marketed by Arkema, Vestamid® marketed by Evonik®, Grilamid® marketed by EMS, Kellaflex® marketed by DSM or to any other PEBA from other suppliers.
• the PEBAs according to the invention comprise at least 50% by mass of bio-resourced carbon on the total mass of carbon, which corresponds to a 12 C / 14 C isotope ratio of at least 0.6 ⁇ 10 12 .
• This content is advantageously higher, especially up to 100%, which corresponds to a 12 C / 14 C isotopic ratio of 1.2 ⁇ 10 12 , in the case, for example, of PEBA with PA 1 1 blocks and PE blocks comprising P03G, PTMG and / or PPG from raw materials of renewable origin.
• said polysiloxane blocks comprise polydimethylsiloxane (hereinafter abbreviated PDMS blocks), polymethylphenylsiloxane, and / or polyvinylsiloxane.
• PDMS blocks polydimethylsiloxane
• polymethylphenylsiloxane polymethylphenylsiloxane
• polyvinylsiloxane polyvinylsiloxane
• Polyolefin block within the meaning of the invention means any polymer comprising as monomer an alpha-olefin, that is to say homopolymers of an olefin or copolymers of at least an alpha-olefin and at least one other copolymerizable monomer, the alpha-olefin preferably having from 2 to 30 carbon atoms.
• alpha-olefin By way of example of alpha-olefin, mention may be made of ethylene, propylene, 1-butene, 1-pentene, 3-methyl-1-butene, 1-hexene, 4-methyl-1-pentene, 3 methyl-1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicocene, 1-dococene, 1-tetracocene, 1- hexacocene, 1 -octacocene, and 1-triacontene. These alpha-olefins can be used alone or as a mixture of two or more.
• ethylene / alpha-olefin copolymers such as ethylene / propylene, EPR elastomers (ethylene-propylene rubber), and EPDM (ethylene-propylene-diene), and polyethylene blends with EPR or EPDM,
• SEBS styrene / ethylene-butene / styrene block copolymers
• SBS styrene / butadiene / styrene
• SIS styrene / isoprene / styrene
• SEPS styrene / ethylene-propylene / styrene
• the BDh block may further comprise at least one polymer chosen from: cationic polymers, of quaternary amine type and / or phosphorus derivatives; and / or anionic polymers, of modified diacid type, comprising a sulfonate group and capable of reacting with a polyol.
• the addition of organic salt can then be envisaged in the preparation of the BDh block or during the reaction between the block PO and the block BDh.
• Document US Pat. No. 5,552,131 describes the synthesis and the various possible structures for the PO block and BDh block copolymer, these being of course conceivable in the process according to the invention.
• block copolymers described above generally comprise at least one polyamide rigid block and at least one flexible block
• present invention in fact covers all copolymers comprising two, three, four (or more) different blocks selected among those described in the present description, as long as at least one of these blocks is a polyamide block.
• the subject of the present invention is also the use of a block copolymer comprising at least one rigid polyamide block and at least one flexible block, for the manufacture of a part which is both resistant to hydrolysis and permeable to CO2. characterized in that the flexible block has amine chain ends.
• the flexible block comprises an NH 2 / OH ratio of end-of-amine chain ends on the alcohol chain, in the range of 30 to 150.
• the part is chosen from a tube, a sheath and an outer coating, in particular for the transport of a petroleum effluent.
• the outer sheath has a CO2 permeability at least 10 times greater than the CO2 permeability of the pressure sheath.
• the pipe according to the invention further comprises a pressure vault (5) consisting of one or more metal wires, intended to withstand the pressure of the fluid.
• the pipe according to the invention further comprises a pair of traction armor plies (6, 7), consisting of metal wires wound at opposite helix angles, intended to support the traction forces exerted on the pipe.
• a pair of traction armor plies (6, 7), consisting of metal wires wound at opposite helix angles, intended to support the traction forces exerted on the pipe.
• Table 1 Nature of the soft blocks used and their NH2 / OH chain end ratio
• PEBA6 is based on PE (PTMG) for purposes of purely alcohol chains (PEdiOH).
• the other PEBAs are based on predominantly amine chain PE, and contain a low concentration of alcohol chain ends: their corresponding NH 2 / OH ratio is indicated in Table 1 above.
• the PEBA granules are contained in a metal cage which is deposited at the bottom of the autoclave.
• the autoclave is then filled with 1.4L of water at pH 7, closed and subjected to inerting under a nitrogen sweep for 3h.
• the autoclave is then placed in an oven heated to 110.degree.
• the hydrolysis is rapid, the tests have a duration of 25 to 30 days.
• the three PEBAs synthesized from polyether predominantly diamine chains are more resistant to hydrolysis than PEBA6 cp3.
• PEBA4 ex2 has a higher resistance to hydrolysis than PA1 1.
• the viscosity of PEBA5 ex1 decreases slightly, that of PEBA1 cp1 decreases a little more at the beginning of the hydrolysis.
• Dumbbells of different products are subject to aging in water.
• the hydrolysis is carried out in a closed autoclave at 110 ° C. Samples are taken and the hydrolyzed dumbbells are subjected to tractions to study the elongation at break after hydrolysis.
• dumbbells After the waterlogging of the dumbbells, they are briefly dried with absorbent paper and then subjected to tractions.
• the permeability of a material is defined by the flux passing through a membrane of thickness "e" with the relation:
• the present invention provides an easily extrudable block copolymer even in large diameter pipes, such as outer sheaths of offshore hose, having an elongation at break greater than 350% according to ISO 527 1 A: 2012, and a stable inherent viscosity, which does not decrease by more than 25% even when said copolymer is subjected to extreme conditions of hydrolysis, for example in sea water, or in tropical or very humid climate.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Health & Medical Sciences (AREA)
• Mechanical Engineering (AREA)
• Organic Chemistry (AREA)
• Polymers & Plastics (AREA)
• Medicinal Chemistry (AREA)
• General Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Geology (AREA)
• Mining & Mineral Resources (AREA)
• Fluid Mechanics (AREA)
• Geochemistry & Mineralogy (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Environmental & Geological Engineering (AREA)
• Physics & Mathematics (AREA)
• Rigid Pipes And Flexible Pipes (AREA)

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• 2017
  • 2017-12-08 FR FR1761832A patent/FR3074807B1/fr active Active
• 2018
  • 2018-12-07 WO PCT/FR2018/053156 patent/WO2019110946A1/fr not_active Ceased
  • 2018-12-07 EP EP18833459.3A patent/EP3720909A1/de active Pending

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