WO1994020286A2 - Ameliorations apportees a des materiaux syntactiques - Google Patents

Ameliorations apportees a des materiaux syntactiques Download PDF

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Publication number
WO1994020286A2
WO1994020286A2 PCT/GB1994/000457 GB9400457W WO9420286A2 WO 1994020286 A2 WO1994020286 A2 WO 1994020286A2 GB 9400457 W GB9400457 W GB 9400457W WO 9420286 A2 WO9420286 A2 WO 9420286A2
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WO
WIPO (PCT)
Prior art keywords
mixing
microspheres
uncured
syntactic
components
Prior art date
Application number
PCT/GB1994/000457
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English (en)
Other versions
WO1994020286A3 (fr
Inventor
Thomas Christopher Arnott
Original Assignee
Thomas Christopher Arnott
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 Thomas Christopher Arnott filed Critical Thomas Christopher Arnott
Priority to AU61492/94A priority Critical patent/AU6149294A/en
Publication of WO1994020286A2 publication Critical patent/WO1994020286A2/fr
Publication of WO1994020286A3 publication Critical patent/WO1994020286A3/fr

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/002—Methods

Definitions

  • This invention relates to methods and apparatus for the
  • the invention is of particular
  • syntactic materials produced in accordance with the 4 invention may also have other uses, such as in the 5 production of buoyant bodies for subsea use.
  • the 6 invention further provides improved coating methods 7 utilising syntactic polyurethane or other syntactic 8 materials, and an improved coated pipeline, or other 9 coated products, formed thereby.
  • 0 1 The use of syntactic materials particularly in the 2 coating of subsea pipelines will now be discussed, by 3 way of background. It will be appreciated, however, 4 that the methods and apparatus of the invention, and the materials produced thereby, may have wider applications.
  • Oil and gas are transported by steel pipes from subsea wells to fixed platforms or moored floating platforms.
  • the oil and gas temperature at the wellhead is in the range of temperatures between 70°C and 130°C.
  • the sea temperature at seabed level of the North Sea is in the range of temperatures of between 4°C and 8°C. Over a relatively short distance the oil and gas temperature is reduced to the surrounding sea temperature. This in turn increases oil viscosity and solidifies any waxes present, and in the case of gas will produce hydrate formation, drastically reducing flow and possibly causing blockage of the line.
  • Syntactic insulation compositions consist of hollow microspheres or small particles of material having low thermal conductivity which are evenly distributed in a matrix of elastomer, epoxy, plastic or the like so as to reduce the thermal conductivity of the matrix material.
  • the thermal conductivity (K factor) of the matrix material typically in the range 0.20 to 0.24 /M°C, can be reduced in this way to a figure typically in the range 0.12 to 0.15 W/M°C.
  • Syntactic insulation coating employing polyurethane (P.U.) as the matrix material in which is dispersed a volume of hollow polymer microspheres, has been used for subsea pipeline insulation since 1986.
  • Syntactic P.U. displays elastomeric properties such as anticorrosion protection and elasticity which provides the required protection for the pipeline and at the same time allows the pipe to be installed by any of the known pipe lay methods, including reeling.
  • the method employed to date for the application of syntactic polyurethane consists of placing a pipe in a mould which produces the desired annulus around the pipe. The mould is inclined at approximately 30 degrees and is then injected progressively with syntactic P.U. As the pipe is supported at each end, it is necessary to use spacers between the pipe and the mould to overcome the natural sag in the pipe and maintain the correct annular spacing along the length of the pipe.
  • P.U. elastomer is formed by mixing correct proportions of a liquid polyol and a liquid isocyanate, which react to produce a solid elastomer.
  • a liquid polyol and a liquid isocyanate, which react to produce a solid elastomer.
  • hollow polymer microspheres are placed in the polyol prior to mixing with the liquid isocyanate.
  • the microspheres have positive buoyancy so that the polyol has to be constantly agitated to prevent separation following the addition of the microspheres thereto.
  • Polymer microspheres are compressible, which leads to difficulties because their volume may change whilst being processed through the metering pump, whereafter they re-expand at the mixing stage thereby altering the mixing ratio.
  • the compressibility of the microspheres also creates problems during the operational life of the coated pipeline and restricts the maximum depth at which the coating can be used due to the hydrostatic forces experienced.
  • incompressible glass microspheres would be desirable in order to avoid the above mentioned disadvantages of polymer microspheres. However this has not hitherto been possible since glass microspheres would be crushed by the high pressures and shear forces required for the proper mixing of the polyol and isocyanate.
  • Conventional equipment for mixing polyurethane includes gear pumps for pumping metered amounts of material into a mechanical mixing head which is driven by an electric motor or air motor.
  • the motor drives a rotor in a chamber producing the high shear forces necessary to completely mix the two components in an inflow condition.
  • a further conventional method is to pump measured amounts of the two components at ultra-high pressure into a non-mechanical mixing head. In this case the components are fed through opposed jets into a small mixing chamber, the mixing taking place by impingement of the two components.
  • Glass microspheres are generally spherical and below 200 microns in diameter. In a dry condition they have high flow characteristics and can be processed in a manner similar to liquids or fluidised powders. Equipment is available which is capable of transporting glass microspheres in metered volumes under pressure and impinging the microspheres into the path of high pressure sprayed resin.
  • the materials so produced are suitable for use in the coating of pipes and the like so as to provide improved coated products, and are also useful in other ares of application.
  • a method of forming a syntactic material comprising a matrix material having a quantity of microspheres dispersed therein and said matrix material being formed by mixing at least two liquid components, wherein said at least two components are mixed together by first mixing means to form an uncured compound, and wherein said microspheres are dispersed in said uncured compound from said first mixing means by second mixing means to form an uncured syntactic material.
  • said elastomeric material is polyurethane and said components are a polyol and an isocyanate.
  • microspheres are substantially incompressible.
  • microspheres are of glass.
  • the method includes a further step of applying said uncured syntactic material to a pipe or the like.
  • the material is applied by a ribbon pour method.
  • the method includes a further step of applying said uncured syntactic material to a pipe or the like by an injection moulding method.
  • the first mixing means may preferably mix said components in a first mixing chamber by mechanical means or by impingement of opposed high pressure jets.
  • the second mixing means may preferably mix said uncured elastomer compound and said microspheres in a second mixing chamber by a rotating pin method, by a static screw method, or by a static turbulence method.
  • the material is preferably applied via an outlet nozzle from said second mixing chamber.
  • the material may be applied in one or more coats to the pipe or the like, which is rotated as it is moved past said nozzle.
  • a coated tubular product having at least one coating of syntactic material, said syntactic material comprising a matrix material having a quantity of substantially incompressible microspheres dispersed therein.
  • said elastomer compound is polyurethane.
  • said microspheres are of glass.
  • apparatus for preparing a syntactic material in accordance with the method of the first aspect of the invention, said apparatus comprising first mixing means including a first mixing chamber adapted to receive said at least two components in a predetermined ratio and to mix said components to produce an uncured compound, said first mixing chamber including outlet means whereby said uncured compound is passed to second mixing means, said second mixing means including a second mixing chamber adapted to receive and mix together said elastomer compound and a quantity of microspheres in a predetermined ratio to produce an uncured syntactic material, said second mixing chamber including outlet means whereby said uncured syntactic material may exit the second mixing chamber.
  • the apparatus includes storage and metering means for feeding said components to said first mixing chamber.
  • the apparatus includes storage and metering means for feeding said microspheres to said second mixing chamber.
  • the apparatus further includes a cooling jacket surrounding at least one of said first and second mixing chambers, whereby the gel time of any uncured compound contained therein may be extended.
  • said first mixing chamber includes a driven rotor for mechanical mixing of said components.
  • said first mixing chamber includes opposed jet inlets for said components, whereby the components may be mixed by impingement.
  • said second mixing means comprises either a rotating pin mixer, a static screw mixer or a static turbulence mixer.
  • said second mixing means is adapted to be removably connected to said first mixing means, such as by means of a bayonet fitting.
  • the mixing apparatus may be used in combination with known apparatus for application of the uncured syntactic material to pipelines or other products by ribbon pouring or injection moulding or the like.
  • coated pipelines will from time to time be subjected to impacts from fishing gear, dropped objects and the like.
  • Normal elastomeric based coatings and insulation coatings have limited impact resistance and are liable to rupture down to the steel resulting in possible corrosion of the pipe.
  • Corrosion of small areas of exposed steel which is at an elevated temperature proceeds at a rate accelerated, typically, by a factor of 4 to 7.
  • the impact resistance of elastomers also tends to deteriorate at elevated temperatures and with age.
  • a method of reinforcing a coated pipe or the like against impact wherein a layer of elastomer material is applied to the pipe or the like and, prior to the curing of said elastomer, a continuous strip of glass fibre fabric is wound about the pipe or the like at a pitch angle such that successive turns of the fabric overlap one another, whereby a plurality of layers of the fabric are embedded in said elastomer.
  • the reinforced layer may be part of an inner anticorrosion layer, in which case a first elastomer layer is preferably applied to the pipe or the like prior to said layer in which said fabric is embedded.
  • the reinforced layer may be part of an outer protective layer, in which case a second layer of elastomer is preferably applied on top of said layer in which the fabric is embedded.
  • said pitch angle and the width of the fabric are selected such that the number of layers of fabric is in the range 2 to 10.
  • a coated pipe or the like having at least one reinforced layer applied thereto in accordance with the fourth aspect of the invention.
  • Fig. 1 is a schematic, sectional side view of a rotating pin mixer for mixing uncured polyurethane and glass microspheres in accordance with a first embodiment of the first aspect of the present invention
  • Fig. 2 is a schematic, sectional side view of a single or twin screw static mixer for mixing uncured polyurethane and glass microspheres in accordance with a second embodiment of the first aspect of the present invention
  • Fig. 3 is a schematic, sectional side view of a static turbulence mixer for mixing uncured polyurethane and glass microspheres in accordance with a third embodiment of the first aspect of the present invention
  • Fig. 1 is a schematic, sectional side view of a rotating pin mixer for mixing uncured polyurethane and glass microspheres in accordance with a first embodiment of the first aspect of the present invention
  • Fig. 2 is a schematic, sectional side view of a single or twin screw static mixer for mixing uncured polyurethane and glass microspheres in accordance with a second embodiment of the first aspect of
  • FIG. 4 is a schematic, sectional side view of an alternative embodiment of a static turbulence mixer for mixing uncured polyurethane and glass microspheres in accordance with a fourth embodiment of the first aspect of the present invention
  • Figs. 5(a) and 5(b) are, respectively, plan and side views of apparatus for applying syntactic P.U. insulation material to a pipe by a ribbon pour (or rotational cast) method
  • Figs. 6(a) and 6(b) are, respectively, side and plan views of apparatus for applying syntactic P.U. insulation material to a pipe by an injection moulding method
  • Fig. 7 is a sectional view of a coated pipe embodying a further aspect of the invention.
  • references in the following description to polyurethane (P.U.) as the syntactic matrix material include references to other matrix materials, such as epoxy materials, polyester and other elastomers or solid materials formed by the mixing of two or more reactive liquid components.
  • the P.U. components liquid polyol and liquid isocyanate
  • the mixing chamber of the P.U. mixing head will be referred to herein as the "primary mixing chamber", and has an outlet for the mixed, uncured P.U.
  • the uncured P.U. is discharged from the primary mixing chamber in metered volumes, under known, variable pressure, into a secondary mixing chamber, described and illustrated in greater detail below.
  • the glass microspheres are also pumped under pressure in metered volumes into the secondary mixing chamber for mixing with the P.U. prior to application to the pipe or the like.
  • alternative types of secondary mixing devices may be employed in the secondary chamber. Examples of these will now be described with reference to Figs. 1 to 4 of the drawings.
  • Fig. 1 shows a mechanical, driven mixer of the rotating pin type, comprising a generally cylindrical chamber 10 having rows of first radially inward projecting pins 12 located on its interior walls.
  • a rotor 14 extends along the central axis of the chamber 10, further rows of second radially outward extending pins 16 being located thereon which intermesh with the first pins 12.
  • the rotor is mounted on a shaft 18 extending through an upper end plate 20 of the chamber 10, for rotation by any suitable drive means (not shown) .
  • a P.U. inlet 22 and a microsphere inlet 24 also communicate with the interior of the chamber 10 through the upper end plate 20.
  • the rotor 14 is driven at high speed, mixing the P.U. and microspheres introduced into the chamber via the inlets 22 and 24.
  • the P.U./microsphere mixture is then discharged through an outlet in a bottom end plate 26 of the chamber 10.
  • the outlet is a nozzle 28 suitable for application of the mixture to a pipe or the like by the ribbon pour (or rotational cast) method, as shall be described in greater detail below.
  • the type of outlet may, however, be varied according to the use to which the syntactic material is to be put.
  • Fig. 2 shows a static screw type mixer, comprising a generally cylindrical chamber 30, having a single or double static, helical screw element 32 affixed to a bottom end plate 34 thereof.
  • P.U. is introduced into the upper end of the chamber via a centrally located inlet 36, and the microspheres are injected through a venturi tube 38 in the P.U. flowline.
  • a high pressure solvent inlet 40 also communicates with the P.U. inlet 36 for cleaning purposes.
  • the P.U. and microspheres are mixed by induced vortex action of the static screw(s) 32 prior to discharging through an outlet 42 in the bottom end plate 34.
  • the outlet 42 is again shown as a nozzle suitable for ribbon pouring, and alternative types may be substituted as required.
  • FIG. 3 shows an alternative mixing method using a static turbulence type of mixer.
  • a generally cylindrical chamber 44 has a P.U. inlet 46 at its upper end and an outlet 48 at its lower end.
  • a microsphere inlet 50 at the upper end may be a venturi tube as in Fig. 2 (where the P.U. pressure is greater than the microsphere flow pressure) , or a separate port as in Fig. 1 (where the P.U. and microsphere pressures are substantially the same) .
  • a plurality of baffles 52 projecting inwardly from the chamber walls define a serpentine path through the chamber 44, and mixing is achieved by turbulence induced by the repeated directional changes of the P.U. and microspheres passing through the chamber 44.
  • the outlet 48 is again shown as a ribbon pour nozzle, and alternative types may be substituted as required.
  • Fig. 4 shows an alternative type of static turbulence mixer, in which a generally cylindrical chamber 110 has a P.U. inlet 112 formed in its side adjacent an upper end thereof, and having inlets 114, 116 for microspheres and cleaning solvents formed in a top plate 118.
  • the mixer is removably connectable to the P.U. outlet 120 of a standard, proprietary type high pressure mixing head 122 by means of a bayonet fitting 124 or the like.
  • the other types of mixer described above might be similarly adapted for removable connection to the primary P.U. mixer.
  • mixing of the P.U. and microspheres is achieved by means of baffles 126.
  • baffles above and below the P.U. inlet 112 converge to increase the velocity of the incoming P.U. to increase its velocity prior to initial mixing with the microspheres.
  • the mixer outlet 128 is again shown as a ribbon pour nozzle, and alternative types may be substituted as required.
  • the gel time for the uncured matrix material is relatively short, typically between 30 seconds and 2 minutes. Mixing of the P.U. and the microspheres has to be carried out while the P.U. is still liquid (prior to gelling) . Temperature increases reduce the gel time so that it may be necessary to provide the primary and/or secondary mixing chambers with a cooling jacket (not shown) to maintain the uncured P.U. at or below a desired maximum temperature prior to application. Water or other conventional coolants may be employed. Access to the interiors of the mixing chambers, rotors, static mixers etc. is necessary for the removal of cured P.U. This may be achieved by the use of removable end caps and interior barrels. High pressure inlets for cleaning solvents, as shown in Figs. 2 and 4, may also be incorporated in the mixers of Figs. 1 and 3.
  • the invention be employed in the ribbon pour application of elastomers to pipes and other tubular products, which is preferable to injection mould methods.
  • material is discharged from the secondary mixing chamber through a nozzle (as seen in Figs. 1 to 4) which extrudes a band of elastomer, typically 10mm to 200mm wide and 2mm to 10mm thick.
  • the poured ribbon is applied helically to a rotating pipe providing an even coating thickness. Desired thicknesses greater than that of the extruded ribbon may be obtained by multiple passes along the pipe.
  • Figs. 5(a) and 5(b) illustrate equipment suitable for application of the syntactic coating by the ribbon pour method.
  • the pipe 54 or the like to be coated is mounted for rotation about its longitudinal axis between the head stock 56 and tail stock 58 of a mobile lathe bed 60.
  • the lathe bed 60 is movable backwards and forwards along a pair of parallel bed rails 62 such that the full length of the pipe 54 may pass by a stationary coating station, generally designated 64.
  • the coating station 64 comprises storage tanks, pumps and metering equipment, collectively designated 66, for the P.U. components; a storage silo, pump and metering equipment, collectively designated 68, for the microspheres; and conduit means 70 for transporting the P.U. components and the microspheres to an applicator head assembly 72 positioned over the pipe 54.
  • the applicator head 72 includes the primary and secondary mixing chambers for, firstly, mixing the P.U. components and, secondly, for mixing the uncured P.U. with the microspheres.
  • the head assembly 72 is preferably mounted on an X-Y-Z manipulator device for movement to accommodate different diameters of pipe and to clear the head and tail stocks etc. when necessary.
  • Figs. 6 (a) and 6 (b) Equipment suitable for this purpose is shown in Figs. 6 (a) and 6 (b) .
  • the pipe or the like (not shown) to be coated is enclosed in a generally cylindrical mould 74 which is hinged along its length.
  • the mould 74 is mounted on a ramp 76, one end of which may be raised to a suitable angle by means of an elevator assembly 78.
  • a plurality of injection ports 80 are spaced along the length of the mould 74, communicating with the interior thereof.
  • P.U. component storage, pumping and metering equipment 82 and microsphere storage, pumping and metering equipment 84 are located alongside the ramp 76, and communicate via conduits 86 with the primary and secondary mixing heads 88 from which the uncured P.U./microsphere mixture is injected into the mould 74 via the ports 80.
  • FIG. 7 shows a cross section through a coated pipe 90 having a first anticorrosion coating 92, typically 2mm to 4mm thick, of solid or syntactic elastomer (preferably applied by ribbon pouring) , a second coating 94 of similar material, also typically 2mm to 4mm thick and preferably also applied by ribbon pour.
  • the second coating 94 is followed immediately by a continuous helical wrap of woven glass fibre fabric 98 which embeds itself in the uncured elastomer 94.
  • the fabric 98 may be between 100mm and 500mm in width and is wrapped at a pitch angle such that successive turns of the fabric overlap one another.
  • multiple successive turns may overlap to provide between two or more (preferably from 2 to 10) layers of fabric embedded in the elastomer of the second coating layer 94. These multiple fabric layers are indicated schematically by a single dashed line 98 in Fig. 6.
  • the embedded glass fibre fabric reinforces the elastomer to provide enhanced impact resistance.
  • an outer, protective elastomer coating can also be applied. As illustrated, this outer elastomer coating can be formed as a first layer 100, in which helically wrapped glass fibre fabric 104 is embedded as described above, and a second layer 102.
  • a reinforced outer coating 100, 102, 104 can be in addition to or instead of the reinforced inner coating 92, 94, 98.
  • Polyurethane, epoxy and polyester materials, or the like, may be employed for such reinforced coatings.
  • the glass fibre reinforcement described can be incorporated in elastomeric coatings in a variety of coating schemes and is not limited to the particular examples described herein.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Reinforced Plastic Materials (AREA)
  • Paints Or Removers (AREA)

Abstract

L'invention se rapporte à un procédé et à un appareil de production de matériaux syntactiques comprenant un matériau matrice qui renferme une quantité de microsphères dispersées. Des microsphères de matériau incompressible peuvent être utilisées. Des composants liquides qui réagissent pour former le matériau matrice sont mélangés dans un premier dispositif de mélange (122), et le matériau matriciel non durci est mélangé aux microsphères selon un raport prédéterminé dans un second dispositif de mélange où les microsphères ne sont pas endommagées, tel qu'un mélangeur à broche rotative, un mélangeur à vis statique ou un mélangeur à turbulence statique. Le matériau syntactique ainsi obtenu est approprié pour être utilisé dans le revêtement de conduites ou analogues, et à d'autres fins. L'invention se rapporte également à un procédé permettant d'améliorer la résistance aux chocs d'une conduite enrobée grâce à l'incorporation d'une bande spiralée en tissu de silionne le matériau du revêtement.
PCT/GB1994/000457 1993-03-10 1994-03-09 Ameliorations apportees a des materiaux syntactiques WO1994020286A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU61492/94A AU6149294A (en) 1993-03-10 1994-03-09 Improvements relating to syntactic materials

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9304850.2 1993-03-10
GB939304850A GB9304850D0 (en) 1993-03-10 1993-03-10 Improvements relating to syntactic pipeline insulation and anticorrosion protection

Publications (2)

Publication Number Publication Date
WO1994020286A2 true WO1994020286A2 (fr) 1994-09-15
WO1994020286A3 WO1994020286A3 (fr) 1994-10-27

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AU (1) AU6149294A (fr)
GB (1) GB9304850D0 (fr)
WO (1) WO1994020286A2 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999057182A1 (fr) * 1998-05-01 1999-11-11 Textron Systems Corporation Tubes metalliques isoles avec une mousse syntactique epoxy
WO2002016519A2 (fr) * 2000-08-25 2002-02-28 J.C. Hempel's Skibsfarve-Fabrik A/S Procede d'isolation thermique de tuyaux d'huile et de gaz et compositions de peinture servant a recouvrir la surface interne des tuyaux d'huile et de gaz
WO2002072701A1 (fr) * 2001-03-08 2002-09-19 Hyperlast Limited Materiaux d'isolation ameliores
WO2004033567A1 (fr) * 2002-10-10 2004-04-22 Mansoor Khorasani Revetements a isolation thermique
WO2005056629A1 (fr) 2003-12-11 2005-06-23 Basf Aktiengesellschaft Polyurethannes syntactiques et leur utilisation pour isoler des installations en mer
WO2005056630A1 (fr) 2003-12-11 2005-06-23 Basf Aktiengesellschaft Polyurethannes syntactiques contenant de l'huile, de preference de l'huile de ricin
RU2665775C1 (ru) * 2017-09-07 2018-09-04 Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский национальный исследовательский технический университет им. А.Н. Туполева-КАИ" (КНИТУ-КАИ) Способ получения изделий сложной формы на основе углеродных синтактных пеноматериалов и установка для осуществления способа
RU2770942C1 (ru) * 2020-10-22 2022-04-25 Власов Василий Владимирович Способ получения и нанесения сферопластика на трубы и устройство для его производства непрерывно циклическим способом.

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FR1479496A (fr) * 1966-03-18 1967-05-05 Construction De Materiel Elect Dispositif pour le mélange de résines de synthèse par turbulence d'air
US3881871A (en) * 1970-10-30 1975-05-06 Upjohn Co Mixer for continuous mixing of foam materials
DE2719714A1 (de) * 1977-05-03 1978-11-09 Wolfgang Hippmann Verfahren zur herstellung von leichtbau-plattenmaterial bzw. nach einem derartigen verfahren hergestellte leichtbauplatte, insbesondere fassadenplatte
DE2817687A1 (de) * 1978-04-22 1979-10-31 Elastogran Gmbh Mischvorrichtung fuer mehrkomponentenkunststoffe, insbesondere polyurethan
EP0025486A1 (fr) * 1979-09-07 1981-03-25 Chemie Linz Aktiengesellschaft Procédé pour la production en continu de matières plastiques cellulaires ayant un comportement au feu amélioré et dispositif pour la réalisation du procédé
EP0037523A1 (fr) * 1980-04-03 1981-10-14 Bayer Ag Dispositif permettant de former un mélange pour la fabrication d'une matière compacte ou mousse, composé d'au moins deux fluides réagissant entre eux et de matière de charge
EP0188340A1 (fr) * 1985-01-17 1986-07-23 Webco Limited Pipeline avec enduit
JPH01262112A (ja) * 1988-04-12 1989-10-19 Kanegafuchi Chem Ind Co Ltd 二液硬化型樹脂の連続混合方法
JPH01314118A (ja) * 1988-06-13 1989-12-19 Human Ind Corp ポリウレタンフォームの製造方法
EP0380163A2 (fr) * 1989-01-24 1990-08-01 Shell Internationale Researchmaatschappij B.V. Procédé d'isolation thermique d'une conduite

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1479496A (fr) * 1966-03-18 1967-05-05 Construction De Materiel Elect Dispositif pour le mélange de résines de synthèse par turbulence d'air
US3881871A (en) * 1970-10-30 1975-05-06 Upjohn Co Mixer for continuous mixing of foam materials
DE2719714A1 (de) * 1977-05-03 1978-11-09 Wolfgang Hippmann Verfahren zur herstellung von leichtbau-plattenmaterial bzw. nach einem derartigen verfahren hergestellte leichtbauplatte, insbesondere fassadenplatte
DE2817687A1 (de) * 1978-04-22 1979-10-31 Elastogran Gmbh Mischvorrichtung fuer mehrkomponentenkunststoffe, insbesondere polyurethan
EP0025486A1 (fr) * 1979-09-07 1981-03-25 Chemie Linz Aktiengesellschaft Procédé pour la production en continu de matières plastiques cellulaires ayant un comportement au feu amélioré et dispositif pour la réalisation du procédé
EP0037523A1 (fr) * 1980-04-03 1981-10-14 Bayer Ag Dispositif permettant de former un mélange pour la fabrication d'une matière compacte ou mousse, composé d'au moins deux fluides réagissant entre eux et de matière de charge
EP0188340A1 (fr) * 1985-01-17 1986-07-23 Webco Limited Pipeline avec enduit
JPH01262112A (ja) * 1988-04-12 1989-10-19 Kanegafuchi Chem Ind Co Ltd 二液硬化型樹脂の連続混合方法
JPH01314118A (ja) * 1988-06-13 1989-12-19 Human Ind Corp ポリウレタンフォームの製造方法
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WO1999057182A1 (fr) * 1998-05-01 1999-11-11 Textron Systems Corporation Tubes metalliques isoles avec une mousse syntactique epoxy
WO2002016519A2 (fr) * 2000-08-25 2002-02-28 J.C. Hempel's Skibsfarve-Fabrik A/S Procede d'isolation thermique de tuyaux d'huile et de gaz et compositions de peinture servant a recouvrir la surface interne des tuyaux d'huile et de gaz
WO2002016519A3 (fr) * 2000-08-25 2002-06-27 Hempels Skibsfarve Fab J C Procede d'isolation thermique de tuyaux d'huile et de gaz et compositions de peinture servant a recouvrir la surface interne des tuyaux d'huile et de gaz
WO2002072701A1 (fr) * 2001-03-08 2002-09-19 Hyperlast Limited Materiaux d'isolation ameliores
WO2004033567A1 (fr) * 2002-10-10 2004-04-22 Mansoor Khorasani Revetements a isolation thermique
WO2005056629A1 (fr) 2003-12-11 2005-06-23 Basf Aktiengesellschaft Polyurethannes syntactiques et leur utilisation pour isoler des installations en mer
WO2005056630A1 (fr) 2003-12-11 2005-06-23 Basf Aktiengesellschaft Polyurethannes syntactiques contenant de l'huile, de preference de l'huile de ricin
RU2665775C1 (ru) * 2017-09-07 2018-09-04 Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский национальный исследовательский технический университет им. А.Н. Туполева-КАИ" (КНИТУ-КАИ) Способ получения изделий сложной формы на основе углеродных синтактных пеноматериалов и установка для осуществления способа
RU2770942C1 (ru) * 2020-10-22 2022-04-25 Власов Василий Владимирович Способ получения и нанесения сферопластика на трубы и устройство для его производства непрерывно циклическим способом.

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GB9304850D0 (en) 1993-04-28
WO1994020286A3 (fr) 1994-10-27

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