WO1993019927A1 - Mousse thermoplastique a microspheres servant a isoler un tuyau - Google Patents

Mousse thermoplastique a microspheres servant a isoler un tuyau Download PDF

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Publication number
WO1993019927A1
WO1993019927A1 PCT/US1993/002870 US9302870W WO9319927A1 WO 1993019927 A1 WO1993019927 A1 WO 1993019927A1 US 9302870 W US9302870 W US 9302870W WO 9319927 A1 WO9319927 A1 WO 9319927A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulation
pipe
syntactic foam
spherical filler
melt stream
Prior art date
Application number
PCT/US1993/002870
Other languages
English (en)
Inventor
Thomas J. Murray
Noel J. Tessier
Original Assignee
W.R. Grace & Co.-Conn.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by W.R. Grace & Co.-Conn. filed Critical W.R. Grace & Co.-Conn.
Priority to EP93909186A priority Critical patent/EP0637282A1/fr
Priority to BR9306155A priority patent/BR9306155A/pt
Priority to JP5517578A priority patent/JPH07505435A/ja
Publication of WO1993019927A1 publication Critical patent/WO1993019927A1/fr
Priority to NO943611A priority patent/NO943611L/no

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/32—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof from compositions containing microballoons, e.g. syntactic foams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/58—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising fillers only, e.g. particles, powder, beads, flakes, spheres
    • B29C70/66—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising fillers only, e.g. particles, powder, beads, flakes, spheres the filler comprising hollow constituents, e.g. syntactic foam
    • 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
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/143—Pre-insulated pipes
    • 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
    • F16L9/00—Rigid pipes
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • B29K2105/165—Hollow fillers, e.g. microballoons or expanded particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Definitions

  • This invention relates generally to syntactic foam insulation, and more particularly to flexible thermoplastic syntactic foam pipe insulating material made by fluidifying a thermoplastic resin having a defined melt index to produce a melt stream; metering a spherical filler into the melt stream under low shear conditions to form a mixture, and forming the mixture into a final form.
  • Off-shore petroleum production requires the use of submarine pipes or conduits to transport oil or gas back to a centralized surface platform or to shore.
  • the oil or gas contains paraffins that can precipitate out as the temperature of the oil or gas passing through the pipes is lowered due to heat transfer from the pipe contents to the cold ocean. This significantly reduces flow or causes blockage of production lines, increasing the cost of production. If blockage occurs costly mechanical or chemical means are necessary to clear any blockage. Added expenses are the cost of shutting down production and the potential loss of any pipe contents caused during removal of the blockage.
  • Several techniques are known for alleviating this problem: 1) adding chemicals to the oil to prevent paraffin precipitation, 2) heating the production lines, or 3) insulating the pipes.
  • Submarine oil or gas production pipelines must also be physically protected. Steel pipes are most commonly used in fabricating off-shore pipelines, and as such require protection from the corrosive sea water. Typically neoprene or epoxy coatings are used for this purpose. However, such coatings are subject to abrasion caused by the installation process,- and an additional overcoating is needed, e.g., of polyethylene.
  • syntactic foam insulation could insulate the pipe as "well as provide corrosion resistance, abrasion resistance and resistance to hydrostatic pressures.
  • Syntactic materials are those in which hollow spherical filler material is embedded in a polymeric matrix.
  • the filler material most often glass or plastic microspheres in the micron size range, imparts thermally-insulative properties to the syntactic material; generally, for a given thickness of syntactic material, as the concentration of microspheres in the matrix rises, so does the insulative.property of the syntactic material.
  • Additional physical attributes such as increased resilience, low thermal conductivity, low creep, and flexibility or elasticity may be given to the syntactic material through the selection of various polymeric matrices. For instance, it has long been desired to make a flexible syntactic foam insulation which could be formed directly on the pipe sections, or wrapped around it as a sleeve or a self- adhesive tape, before the pipe is shipped to a lay barge for pipe laying. This "pre-coating" is desirable because it means the crew laying the pipe now has one less task to do, namely coating the pipe sections, although the joints must still be wrapped and sealed. Also, the flexibility is necessary because the pipe sections must flex and bend during installation.
  • syntactic foam insulating materials are made using thermoset resins such as polyurethane; these resins are more difficult to work with than thermoplastic resins because they may only be processed at temperatures below the B-stage of the resin, i.e., the temperature at which the resin begins to cross-link. Further, such foams do not have the desired flexibility to bend with the pipe during installation, and also often absorb water, requiring a separate coating to make the foam water- impermeable.
  • Syntactic foam insulation having a thermoplastic matrix has been long desired, but hard to make. Particularly, it is difficult to compound glass microspheres and other hollow spherical fillers into a thermoplastic polymeric matrix at low enough shear forces to prevent crushing the spheres during the process.
  • the thermal conductivity of an effective submarine pipe insulation needs to be less than about 0.15 W/m-T . When about 5% or greater of the spheres in the matrix are crushed, it is difficult to attain this necessary level of thermal conductivity. Furthermore, the structural properties of the syntactic foam are also adversely affected.
  • the finished insulation would be totally unacceptable for use as submarine pipe insulation, because it would not be hydrostatic pressure-resistant, abuse-resistant, or creep-resistant.
  • the chain-scission agent stiffens the plastic matrix, decreasing the flexibility of the material so as to make it impractical for use as submarine pipe insulation, because it will not flex well as the pipe is laid.
  • thermoplastic syntactic cable jacketing has been made, but such jacketing contains a large amount of entrained air to keep the cable jacketing buoyant.
  • Such materials are inappropriate for insulating deep sea pipeline, however; the air pockets in the material will cause the material to collapse at ocean-floor-pressures, leading to absorption of water in the interstices of the material.
  • These materials are also not abrasion or heat resistant, and cannot be made desirably thin to bend with the pipe, while providing efficient insulation for it.
  • the inventors have thus found no truly satisfactory way to compound spherical fillers into a thermoplastic polymeric matrix to make an advantageously thin, flexible syntactic foam pipe insulating material without 1) crushing a subs antial proportion of the spherical filler during processing, 2) being time-consuming and difficult to put into practice on a large scale, or 3) utilizing specialized, or heavily modified standard equipment.
  • syntactic foam insulation having superior thermal and structural qualities which may be carried out on a large scale, e.g., in sufficient volume for pipe applications, on presently available equipment.
  • Further objects of the invention are to provide a syntactic foam insulation made by a method of the invention, and to provide a method of insulating pipe utilizing a syntactic foam made by a method of the invention.
  • the present invention relates to a method of making syntactic foam insulation, comprising the steps of fluidifying a thermoplastic resin having a melt index of from 3 to 30g/10 min to produce a melt stream; metering a spherical filler into the melt stream under low shear conditions to form a mixture, and forming the mixture into a final form.
  • the invention further relates to syntactic foam insulation made . by the above process.
  • Figure 1 depicts in simplified side view a double-stage extruder carrying out the method of the invention.
  • Figure 2 depicts in partial cross-section a ready-to-use pipe section in accordance comprising an outer sleeve of syntactic material superimposed over the outer pipe surface.
  • Figure 3 depicts in plan view a pipe section wrapped with a self-adhesive syntactic foam tape made in accordance with the invention.
  • the objects of the invention have been substantially accomplished by the use of a method which, in a preferred embodiment, uses a two-stage extrusion process, whereby a first stage of an extruder means fluidizes a thermoplastic resin base and conveys it to a second stage of an extruder means where, under low shear conditions, a spherical filler material is introduced into the fluid plastic stream.
  • a first stage of an extruder means fluidizes a thermoplastic resin base and conveys it to a second stage of an extruder means where, under low shear conditions, a spherical filler material is introduced into the fluid plastic stream.
  • the thermoplastic and filler material thereafter mix in the second stage of the extruder barrel and the fluid mixture is deaerated and extruded into a desired final form.
  • the resulting product contains a substantially homogeneous distribution of spherical filler material in the polymeric matrix, which, as stated previously, is crucial to maximizing the thermal and structural properties of the finished syntactic
  • Thermoplastic is intended to mean any plastic, polymeric, or elastomeric base commonly used in the art as feed stock in extrusion or extrusion-related processes which can be heated and softened repeatedly without suffering any basic change in characteristics.
  • Thermoplastics used in this invention must be of a high "melt index,” which are defined as those which, under test conditions specified by ASTM standard D3835, have a low viscosity, i.e., in the range of from about 3.0 to 30g/10min, preferably from about 15 to 30g/10min, and more preferably from about 20 to 25g/10min.
  • Thermosetting resins are inappropriate for use in the invention.
  • thermoplastic resins are polyimides, acrylonitrile-butadiene- styrene ("ABS") resins, acetals, acrylics, cellulosics, chlorinated polyethers, fluorocarbons, nylons (polyamides), polycarbonates, polyolefins and copolymers thereof including, but not limited to, polyethylenes and copolymers thereof, polypropylenes and copolymers thereof, chlorinated or fluorinated polyolefins and copolymers thereof; polystyrenes, and vinyls, e.g., polyvinyl chloride.
  • ABS acrylonitrile-butadiene- styrene
  • acetals acrylics
  • cellulosics chlorinated polyethers
  • fluorocarbons nylons (polyamides)
  • polycarbonates polyolefins and copolymers thereof including, but not limited to, polyethylenes and copolymers thereof, polypropylene
  • thermoplastic polyolefins such as those manufactured under the trademarks HIFAX (Himont) and FLEXOMER (Union Carbide) are particularly suitable for use in the invention, as are SURLYN (E. I.
  • thermoplastic polymers derived from ethylene/methacrylic acid copolymers, and thermoplastic elastomers (“TPE") such as PEBAX (Atochem), which is a polyether blocked polyamide (“PEBA”).
  • TPE thermoplastic elastomers
  • the invention should not be limited to the use of these resins.
  • These thermoplastic resins provide the necessary flexibility to the finished syntactic foam insulation, which is also very desirable from the standpoint of producing such articles as syntactic foam insulating tapes and sleeves, which by their nature need to be flexible and/or pliable for easy installation. Although these resins are flexible, they are also resistant to creep, elongation, abrasion and corrosion, making their use in pipeline applications even more desirable.
  • Such resins are very resistant to the high temperatures of the pipelines (as high as 125 * C). These resins have a characteristic chain length that distinguishes them from other thermoplastic resins that have been used in this art. Specifically, these resins have longer chains and low melt indices, which makes them very flexible and strong. Fluidification of such resins and addition of spherical filler under low shear conditions to make a syntactic foam having a high proportion of intact microspheres, as described herein, makes the use of short chain polymers with a chain-scission agent, as taught in U. S. Patent No.5,158,727, unnecessary.
  • the spherical filler used in the invention may be any type of hollow spheres which are typically used in making syntactic foams.
  • the microspheres are preferably made of glass, but may also be made of plastic or other materials well-known to those skilled in the art, provided that they will not melt under the conditions necessary for fluidification of the thermoplastic resin to produce the melt stream.
  • the size range of the spheres will depend on the particular demands to be made on the syntactic foam to be produced.
  • the spheres will range in diameter from about 3 to lOO ⁇ , preferably from about 5 to 80 ⁇ , more preferably from about 20 to 80 ⁇ , even more preferably from about 20 to 70 ⁇ , and most preferably from about 50 to 70 ⁇ .
  • Microspheres of more than one size, or a range of sizes may be used, e.g., a ' blend of spheres ranging in diameter from about 1 to 20 ⁇ and spheres ranging in diameter from about 50 to lOO ⁇ .
  • a such a size distribution may allow denser packing of the microspheres in the finished syntactic foam.
  • the strength of the microspheres is critical; the pure microspheres should be able to withstand pressures of from 6.89 xl to 27.6 xl ⁇ MpA under conditions according to ASTM D3102 while sustaining no more than 20% breakage.
  • the density of the microspheres is preferably in the range of from about 0.1 to l.lg/cc, and more preferably from about 0.20 to 0.40g/cc.
  • extrusion apparatus as such apparatus are widely available.
  • a two-stage extruder like the double- screw unit depicted (in greatly simplified form) in FIG. 1 may be employed.
  • extruders are advantageous because they allow addition and fluidification of the resin in the first stage, and addition of the spherical filler in the second stage, thus making separate apparatus for carrying out the fluidification and filler addition steps unnecessary.
  • Extruders that may be used in the method of the invention are well-known in the art; conventional double-screw extruders or double-stage Buss Kneader double- screw extruders may be used, with a corotating design being preferable.
  • such a two-stage extruder comprises a feed hopper 1 into which thermoplastic feed material is placed for extrusion.
  • a feeder such as an auger feeder (not shown) may be used if more precise feed stock addition is desired.
  • the feed material passes from hopper 1 through feed throat 2 onto screw ;
  • the design of screw 3 within first-stage barrel 7 is of a geometry to effectively plasticate, shear and meter the thermoplastic resin in the first-stage barrel 7 into a melt stream of the desired viscosity. Those skilled in the art will know how to fabricate such a screw.
  • thermoplastic As screw 3 rotates, the thermoplastic is pumped into first stage barrel 7, which is heated by heaters 8 monitored by thermocouples 9. The heat produced by heaters 8 and the frictional action of screw 3 against the feed material and first stage barrel 7 liquefies the thermoplastic, forming a melt stream which is metered into second stage barrel 1Q.
  • microspheres 12 (which have been previously placed into microsphere hopper 11) are metered into the melt stream in second stage barrel 10 under low shear conditions; it is preferred to meter microspheres using a feeder such as a weight belt side feeder.
  • a feeder such as a weight belt side feeder.
  • the precise addition rate will depend on the desired concentration of microspheres 12 in the syntactic foam, and the extrusion rate.
  • the geometry of the section of screw 3_ under microsphere hopper 11 must be chosen so the microspheres are folded gently into the melt stream; such "low shear" profile screw designs will be apparent to those skilled in the art, and such screw profiles provide the necessary low shear conditions for addition of microspheres without breakage.
  • providing "low shear conditions" in accordance with the invention means using “low shear” designs to gently fold spherical filler into the melt stream containing the low melt index thermoplastic resins of the invention.
  • the microspheres 12 are thus carried into the melt stream and mixed into it with little or no breakage; less than 5% breakage is important. Preferably less than 3% of the microspheres in the thermoplastic are broken. More preferably, substantially all of the microspheres present are unbroken.
  • the mixture is transported down second stage barrel 10, heated by heaters 13 and regulated by thermocouples 14.
  • a venting zone 16 to allow the removal of any air entrained into the melt stream caused by the mixture of the microspheres into the melt stream is preferably installed in second stage barrel 1Q.
  • venting zone substantially remove any unreinforced air (i.e., air not contained within microspheres) from the extrudate, because the presence of unreinforced air in the matrix of the syntactic foam insulation makes the insulation highly susceptible to water incursion and collapse at high hydrostatic pressures, resulting in a significant reduction in the insulative efficiency of the insulation.
  • microsphere loadings impart greater insulative capacity to the syntactic foam insulation. If higher loadings of microspheres in the syntactic foam are desired, i.e., about 30-50% by volume of the foam insulation, we have found it advantageous to meter a proportion of the spherical filler into a first point of the melt stream under low shear conditions, and the remainder at a second point of the melt stream, located downstream of the first, under low shear conditions. Generally, the proportion of filler metered into the first point ranges from 10 to 90%, with 30 to 80% being preferred, and 50 to 70% particularly preferred.
  • additives may be added to the melt stream along with the spherical filler if desired, such as silanes, adhesion promoters, or coupling agents.
  • the mixture exits at the screw tip 15, at which point is connected a die of some kind, such as a flat sheet die, a profiled sheet die, a hollow mandrel die, etc.
  • the mixture is then pulled, rolled, cast, chopped, etc. into the desired final form.
  • the final form may be spheres, pellets, tapes or ribbons, etc.
  • pellets of the syntactic foam may be blended with, e.g., EPDM rubber or extender resin and extruded to form an insulated pipe wrap that is more elastomeric and abuse-resistant.
  • the resulting syntactic foam may be installed on pipe in a number of ways.
  • An integral insulated pipe section like that depicted in partial cross-section in FIG. 2 may be made by placing a section of pipe to be insulated within a cylindrical form; the syntactic foam insulation may then be extruded into the space between the form and the pipe's outer surface to form the outer coating.
  • the resulting integral insulated pipe section 16 comprises a pipe 17 and a covering of syntactic foam insulation lg. After removal of the form the integral insulated pipe section is ready to ship to the laybarge where it may be inserted into a pipeline without any further preparation.
  • an insulative tape may be wrapped around the joint.
  • a custom molded clamshell-type insulative enclosure may be made by compression molding or casting the fluidified syntactic foam insulation into the desired configuration.
  • the insulative enclosure could be attached in a matter of seconds, simplifying operations on the laybarge.
  • the insulation may be a syntactic foam insulative tape which may wrapped around the pipe and/or joints.
  • the flexible syntactic foam described herein may be extruded into a tape or ribbon form, to one side of which may be applied a self-adhesive coating and/or a release layer which will be removed before installation of the tape.
  • the tape may be left uncoated, with adhesive being applied to either the tape or the pipe at a later time.
  • An insulated pipe 27 having such a flexible insulative syntactic foam tape 28 wrapped around it is shown in plan view in FIG. 3.
  • Syntactic foam of the invention made with thermoplastics stich as the
  • HIFAX type mentioned is desirably abrasion-resistant, but there may be instances where an outer protective coating is desirable or necessary.
  • Outer abrasion-resistant coatings which could be applied are, e.g., neoprene; polyethylene; polypropylene; polyurethane; polyvinyl chloride; glass; and abrasion-resistant fabrics such as KENLAR aromatic nylons.
  • Other coatings, imparting advantageous properties to the syntactic foam can also be applied if desired.
  • the thermal conductivity of syntactic foam produced according to the invention is generally no higher than about 0.14W/m-' .
  • Another property of the inventive syntactic foam is its flexibility, which, when installed on a pipe, enables it to bend with the pipe during laying operations.
  • Syntactic foam made in accordance with the invention generally has a flexural modulus of about 3000 to 4000psi, and preferably 3500 to 4000psi.
  • a insulative syntactic foam tape was made in the following manner.
  • the polymer used was a HIFAX (Himont) thermoplastic olefin similar to grade CAIOA. Glass microspheres having an average density of 0.28g/cc, an average size of 40 ⁇ and an average strength of no more than 20% breakage at 6.89MpA were used.
  • a two-stage corotating twin screw extruder was used to produce the syntactic foam insulation.
  • the twin screw was assembled of various elements to accomplish each extrusion processing requirement.
  • the barrel temperature was set at 190 °G and the twin screw speed was set at 150 RTM.
  • Polymer was fed to the feed section at 45kg/hr.
  • microspheres were fed into the second stage at a rate of 6kg/hr.
  • a venting zone built into the second stage was used to effectively remove entrained air from the extrudate.
  • the extrudate reaching the twin-screw tip passed through a die having a rectangular cross-section, resulting in a 25mm wide tape about 6mm thick.
  • the tape which was produced had a thermal conductivity of 0.135W/m-TE , which is adequate for submarine pipe insulation, and was flexible, abrasion and impact resistant.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Thermal Insulation (AREA)

Abstract

L'invention décrit une mousse plastique souple isolante comportant des microsphères, ainsi que des procédés servant à la fabriquer. On fluidifie une résine thermoplastique à indice de fusion faible, afin de produire un écoulement de matière fondue et on introduit de façon dosée des microsphères dans ledit écoulement dans des conditions de cisaillement faibles. Le procédé permet d'effectuer une production plus rapide de ce type de mousse, ainsi qu'une production de meilleure qualité étant donné que la rupture des microsphères est sensiblement limitée. On obtient une section de tuyau isolé (16) monobloc constituée par un tuyau (16) et par une couverture isolante (18) de mousse plastique à microsphères.
PCT/US1993/002870 1992-03-31 1993-03-29 Mousse thermoplastique a microspheres servant a isoler un tuyau WO1993019927A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP93909186A EP0637282A1 (fr) 1992-03-31 1993-03-29 Mousse thermoplastique a microspheres servant a isoler un tuyau
BR9306155A BR9306155A (pt) 1992-03-31 1993-03-29 Isolamento de tubo de espuma sintática termoplástica
JP5517578A JPH07505435A (ja) 1992-03-31 1993-03-29 熱可塑性シンタクチックフォーム断熱材
NO943611A NO943611L (no) 1992-03-31 1994-09-29 Syntaktisk skum for rörisolasjon

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US86086892A 1992-03-31 1992-03-31
US07/860,868 1992-03-31

Publications (1)

Publication Number Publication Date
WO1993019927A1 true WO1993019927A1 (fr) 1993-10-14

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PCT/US1993/002870 WO1993019927A1 (fr) 1992-03-31 1993-03-29 Mousse thermoplastique a microspheres servant a isoler un tuyau

Country Status (8)

Country Link
EP (1) EP0637282A1 (fr)
JP (1) JPH07505435A (fr)
AU (1) AU3968993A (fr)
BR (1) BR9306155A (fr)
CA (1) CA2131916A1 (fr)
NO (1) NO943611L (fr)
RU (1) RU94045989A (fr)
WO (1) WO1993019927A1 (fr)

Cited By (20)

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WO1996032254A1 (fr) * 1995-04-11 1996-10-17 Elf Atochem S.A. Bande comportant une matiere polymerique chargee de microspheres creuses (mousse)
EP0947756A3 (fr) * 1998-04-03 2002-01-02 Uponor Innovation Ab Elément modulaire pour fluide d'un système sanitaire et/ou installation de chauffage,notamment un tuyau pour installations sanitaires ou de chauffage
US6455630B1 (en) 1996-01-31 2002-09-24 Basell Poliolefine Italia S.P.A. Polyolefin composition suited for metal coating by flame spraying
WO2002087869A2 (fr) * 2001-04-27 2002-11-07 Fiberspar Corporation Tube composite ameliore
WO2003087205A1 (fr) * 2002-04-16 2003-10-23 Borealis Technology Oy Composition polyoleofinique synthetique de revetement de conduites
DE20318330U1 (de) * 2003-11-25 2005-04-14 Brandenburger Isoliertechnik Gmbh & Co Thermoisolierplatte
WO2009079784A1 (fr) * 2007-12-21 2009-07-02 Shawcor Ltd. Isolation en styrène pour tuyau
WO2010009559A1 (fr) * 2008-07-25 2010-01-28 Shawcor Ltd. Isolation résistante à la haute température pour tuyau
US7951316B2 (en) 2005-04-05 2011-05-31 Exxonmobil Chemical Patents Inc. Process for pipe seal manufacture
US8522829B2 (en) 2006-11-29 2013-09-03 3M Innovative Properties Company Microphere-containing insulation
WO2014169358A1 (fr) * 2013-04-17 2014-10-23 Braskem S.A. Composition synthétique de polypropylène, utilisation de cette composition et tube
US8955599B2 (en) 2009-12-15 2015-02-17 Fiberspar Corporation System and methods for removing fluids from a subterranean well
US8985154B2 (en) 2007-10-23 2015-03-24 Fiberspar Corporation Heated pipe and methods of transporting viscous fluid
US9127546B2 (en) 2009-01-23 2015-09-08 Fiberspar Coproation Downhole fluid separation
EP3023216A1 (fr) * 2014-11-05 2016-05-25 Audi Ag Composant composite et son procede de fabrication
GB2550925A (en) * 2016-05-31 2017-12-06 Bostik Ltd Polydisperse self-adhesive closed-cell solid-foam insulation material
US9890880B2 (en) 2012-08-10 2018-02-13 National Oilwell Varco, L.P. Composite coiled tubing connectors
CN109082027A (zh) * 2018-06-29 2018-12-25 重庆文理学院 耐热低烟阻燃的pvc电缆
US10234068B2 (en) 2015-04-20 2019-03-19 Shawcor, Ltd. Foamed insulation coating on pipes and methods therefor
US12117241B2 (en) 2018-04-09 2024-10-15 Onejoon, Gmbh Furnace

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GB0720713D0 (en) * 2007-10-23 2007-12-05 Wellstream Int Ltd Thermal insulation of flexible pipes
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US6491984B2 (en) 1996-01-31 2002-12-10 Gian Luigi Rigosi Process for coating metal surfaces with a polyolefin composition by flame spraying
US6455630B1 (en) 1996-01-31 2002-09-24 Basell Poliolefine Italia S.P.A. Polyolefin composition suited for metal coating by flame spraying
EP0947756A3 (fr) * 1998-04-03 2002-01-02 Uponor Innovation Ab Elément modulaire pour fluide d'un système sanitaire et/ou installation de chauffage,notamment un tuyau pour installations sanitaires ou de chauffage
WO2002087869A3 (fr) * 2001-04-27 2003-03-20 Fiberspar Corp Tube composite ameliore
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WO2002087869A2 (fr) * 2001-04-27 2002-11-07 Fiberspar Corporation Tube composite ameliore
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WO2014169358A1 (fr) * 2013-04-17 2014-10-23 Braskem S.A. Composition synthétique de polypropylène, utilisation de cette composition et tube
EP3023216A1 (fr) * 2014-11-05 2016-05-25 Audi Ag Composant composite et son procede de fabrication
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GB2550925A (en) * 2016-05-31 2017-12-06 Bostik Ltd Polydisperse self-adhesive closed-cell solid-foam insulation material
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US12117241B2 (en) 2018-04-09 2024-10-15 Onejoon, Gmbh Furnace
CN109082027A (zh) * 2018-06-29 2018-12-25 重庆文理学院 耐热低烟阻燃的pvc电缆

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JPH07505435A (ja) 1995-06-15
AU3968993A (en) 1993-11-08
EP0637282A4 (fr) 1994-12-05
EP0637282A1 (fr) 1995-02-08
BR9306155A (pt) 1998-06-23
NO943611D0 (no) 1994-09-29
CA2131916A1 (fr) 1993-10-14
NO943611L (no) 1994-11-24
RU94045989A (ru) 1996-08-20

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