WO2012110407A1 - Dispositif de pulvérisation pour une résine réactive et procédé de production d'une résine réactive - Google Patents

Dispositif de pulvérisation pour une résine réactive et procédé de production d'une résine réactive Download PDF

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Publication number
WO2012110407A1
WO2012110407A1 PCT/EP2012/052260 EP2012052260W WO2012110407A1 WO 2012110407 A1 WO2012110407 A1 WO 2012110407A1 EP 2012052260 W EP2012052260 W EP 2012052260W WO 2012110407 A1 WO2012110407 A1 WO 2012110407A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
inlet
flow channel
reactive
reactive component
Prior art date
Application number
PCT/EP2012/052260
Other languages
German (de)
English (en)
Inventor
Hans-Guido Wirtz
Stephan Schleiermacher
Roger Scholz
Heike Niederelz
Dirk Steinmeister
Frank Grimberg
Achim Symannek
Original Assignee
Bayer Materialscience Ag
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
Priority claimed from DE102011011241A external-priority patent/DE102011011241A1/de
Priority claimed from DE201110012287 external-priority patent/DE102011012287A1/de
Application filed by Bayer Materialscience Ag filed Critical Bayer Materialscience Ag
Publication of WO2012110407A1 publication Critical patent/WO2012110407A1/fr

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Classifications

    • 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
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/76—Mixers with stream-impingement mixing head
    • B29B7/7663—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube
    • B29B7/7673—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube having additional mixing arrangements

Definitions

  • the present invention relates to a spray device for a reactive resin and a process for producing the same.
  • the mixing of liquid reactive components usually takes place in a mixing head, it being possible to distinguish between high-pressure and low-pressure mixing.
  • the spray application is realized in both cases via downstream atomizer systems.
  • the mixing energy required for mixing the reactive components is determined by dynamic Stirrers or static mixing elements introduced.
  • the volume of the mixing chambers are relatively large compared to mixing heads of high-pressure mixing and must be cleaned after completion of the mixing process with suitable detergents or compressed air.
  • suitable detergents or compressed air Particularly in the case of the processing of highly reactive resins, such low-pressure mixing boilers tend to form mixing chamber deposits and thus clogging after prolonged operation.
  • the pressure energy of the reactive components is converted into kinetic energy via nozzles.
  • the kinetic energy is spatially concentrated and used for mixing.
  • the cleaning of the mixing chamber is usually carried out by mechanical plunger, whereby short-term interruptions of the spraying process are possible.
  • the nebulizer systems nachgeschait the mixing process are used for the division of the reaction mixture in one-time drops.
  • single-fluid nozzles airless high-pressure atomization
  • two-fluid nozzles external and internal mixture compressed gas atomization
  • Different atomizer systems are also described in the prior art.
  • Corresponding air and / or gas inlet openings in the flow channel are known, for example, from US Pat. No. 3,923,253, DE 102007 016785 A1 or US Pat. No. 6,131,823.
  • a device in which optionally reactants are passed from two supply lines in a mixing tube.
  • the mixing tube has a series of nozzles Bl, Dl, B2 and D2, which are introduced into the tube by a high-pressure medium, for example a gas, but also components of the main liquid flow, which are mixed with the main liquid flow.
  • the nozzles are mounted in opposite directions, so that a turbulence takes place in the mixing tube.
  • the device described in US-A-3563459 describes a mixing chamber in the form of a tube. In this flow in the direction of flow from above tubes, which transport the reactive components. Parallel to the mixing chamber run laterally two tubes, which are connected via tangentially attached lines to the mixing chamber. An air flow is introduced into the mixing chamber via these lateral tubes. This leads to the mixing of the components in the mixing chamber.
  • a reactive additive may be added to the reactive resin after mixing. This is often done by mixing the Sprühstrahis the reactive resin with a spray of the corresponding filler. This is known, for example, from DE 2517864 A1, US Pat. No. 3,302,891, WO 2009/052990 A1 or EP 1 458494 B1. In the methods described here, the mixing head is no longer damaged by the fillers. Also, there is no damage to the fillers themselves. However, the wetting of the fillers with the reactive resin is often insufficient here.
  • WO 2009/106236 A1 describes a newly developed process for introducing solids into a compressed-gas atomized polyurethane spray jet.
  • the introduction of the solid particles takes place with the aid of a spray gas as a particle carrier in the still in the spray attachment located liquid reactive resin (reaction jet).
  • the gas-solid mixture is fed tangentially to the liquid reaction mixture, mixed by the resulting Rotationsdralls and only subsequently discharged as a multiphase mixture via a nebulizer as a spray.
  • the device comprises a spray channel, which is separated via a wall from a gas space.
  • the gas space may surround the spray channel or be arranged in the form of a hollow cylinder in the interior of the spray channel.
  • Via gas channels a mixed gas is passed from the gas space into the spray channel, which results in the mixing of the reactive components in the spray channel.
  • the object of the present invention is in contrast to the provision of a spray device for a reactive resin, with which different reactive resins can be processed.
  • the metering and a uniform wetting of fillers should continue to be possible.
  • Another object of the present invention is to provide a process for producing a reactive resin.
  • the object underlying the invention is achieved by a spray device for a reactive resin, which comprises the following constituents:
  • FIG. 1 schematically shows a spraying device according to the invention.
  • the centrally extending flow channel 6 is suitable both for transporting and for mixing at least one reactive component of a reactive resin with a carrier gas.
  • the flow channel 6 In the flow direction, the flow channel 6 at its upper end to a cleaning ram 2. This allows easy cleaning of the complete flow channel.
  • the flow channel 6 has an outlet opening 7. About this occurs from the reactive resin.
  • At least one inlet channel 4, 5 opens into the flow channel 6. Via this at least one inlet channel 4, 5, at least one flowable reactive component can be introduced into the flow channel 6 become.
  • Flowable reactive components in the context of the present invention include both liquid and solid, free-flowing reactive components.
  • a device according to the invention may have only one inlet channel 4 or 5.
  • at least one gas inlet 1 via which a carrier gas is introduced, then flows into the flow channel 6 initially. Subsequently, via the inlet channel
  • the flow channel 6 then has at least one supply device 3 for at least one mixed gas stream.
  • turbulent swirls occur inside the flow channel 6, whereby the components introduced via the at least one gas inlet 1 and the inlet channel 4 or 5 are mixed.
  • the device has at least two inlet channels 4 and 5, which are preferably located at different levels. In this case, it is preferable that the intake ports 4 and
  • a carrier gas is first introduced into the flow channel 6 in the flow direction via at least one gas inlet 1. Subsequently, via an inlet channel 4 at least one flowable reactive component in introduced the flow channel 6. Further below in the flow direction, the flow channel 6 has at least one supply device 3 for at least one mixed gas stream. The further inlet channel 5 is then attached to the flow channel 6 in the flow direction downstream of the at least one first feed device 3 in the flow direction. If further inlet channels 4, 5 are attached to the flow channel 6, these too are preferably arranged alternately on opposite sides of the flow channel 6.
  • the same or different reactive components can be introduced into the flow channel 6 via these.
  • a carrier gas is introduced into the flow channel 6 via the at least one gas inlet 1.
  • the carrier gas used is preferably an inert gas which does not react with the reactive component.
  • air is used as a carrier gas, since this does not react with the reactive component used.
  • Carrier gas in the sense of the present application is also to be understood as meaning a gas or gas mixture. This gas or gas mixture may contain one or more free-flowing fillers.
  • Free-flowing fillers may be fillers which impart desired properties to the reactive resin to be produced.
  • Is the at least one filler in the Strömungskana! 6 at least one reactive component is introduced into the flow channel 6 in the flow direction via the at least one inlet channel 4, 5.
  • Filler and reactive component are then mixed in the further course of the flow channel 6 through the introduced by the at least one supply means 3 mixed gas stream, whereby a uniform wetting of the at least one filler is achieved with the at least one reactive component
  • the transport gas has a solid reactive component as a free-flowing filler. If the at least one solid reactive component is introduced into the flow channel 6 with the aid of the transport gas, a uniform mixing with the at least one flowable reactive component takes place here, which is introduced into the flow channel 6 via the at least one inlet channel 4, 5 becomes.
  • the uniform wetting of any existing free-flowing fillers with the at least one fiiessdiren reactive component is also ensured by the at least one mixed gas stream, which is introduced via the at least one supply means 3 in the flow channel 6.
  • the introduction of the mixed gas into the flow channel results in a turbulent mixing of the at least one flowable reactive component introduced via the at least one inlet channel 4 and the filler introduced via the gas inlet 1 together with the carrier gas.
  • reaction components are introduced as pre-atomized aerosols by means of a compressed gas stream in the flow channel.
  • volume flows and the particle sizes mass differences in the mixing ratio of the reactants can be compensated.
  • the at least one inlet channel 4, 5, the at least one feed device 3 and the at least one gas inlet 1 each with the flow channel 6 form an angle ⁇ of> 0 0 to ⁇ 180 0 with each other.
  • the angle ⁇ corresponds to the angle which the flow channel 6 encloses with the corresponding inlets in the flow direction, as shown schematically in FIG.
  • a good mixing of the individual components is ensured.
  • the reactive components are in the flow direction or perpendicular thereto introduced into the flow channel 6. As a result, the basic flow direction in the flow channel 6 is not disturbed. A mixing is still ensured.
  • the device has at least one supply device 3 for introducing a mixed gas stream.
  • a mixed gas stream for introducing a mixed gas stream.
  • a plurality of feeders 3 are attached to the flow channel 6 at different levels. If at least two feed devices 3 are located on one plane, they can be attached tangentially or opposite one another.
  • Decisive for a tangential or opposing arrangement is a desired thorough mixing of the flowable reactive component with the at least one free-flowing filler and / or the at least one solid reactive component.
  • Factors influencing good mixing are the diameter and length of the flow channel 6 downstream of the inlets 3, flow rates of the at least one flowable reactive component, the at least one free-flowing filler and / or the at least one solid reactive component and, for the same particle size, density of the at least one flowable one Reactive component, the at least one free-flowing filler and / or the at least one solid reactive component.
  • Whether a tangential or an opposing arrangement too is preferable, must be determined case-specifically according to these factors.
  • the object underlying the present invention is achieved by a method for producing a reactive resin using a device as described above, wherein a carrier gas is introduced into the flow channel via the at least one gas inlet 1. 6 introduces at least one reactive component via the at least one inlet channel 4, 5 and doses at least one mixed gas via at least one feed device 3.
  • mixed gas is understood to mean a gas or gas mixture which does not react with the at least one flowable reactive component, but mixes it with any fillers that may have been filled. By introducing the mixed gas into the flow channel 6, turbulent mixing occurs.
  • the mixed gas itself does not react with the at least one flowable reactive component.
  • the mixed gas is preferably an inert gas. It can be used as the mixed gas, the same or a different gas as the transport gas, wherein air is preferably used as a mixed gas, since air does not react with the components present in the flow channel 6.
  • the mixed gas may according to the invention comprise one or more free-flowing fillers and / or at least one solid reactive component.
  • the mixed gas prefferably be droplets of a reactive component of a reactive resin having.
  • a free-flowing filler can be introduced into the flow channel 6 together with the transport gas via the at least one gas inlet 1.
  • Giant filler in the sense of the present invention is understood to mean fillers known from the prior art, such as, for example, fibers. It is also possible via the gas inlet 1 to meter a solid reactive component in the sense of a free-flowing filler into the flow channel 6.
  • the device according to the invention and the method according to the invention make it possible to produce different reactive resins which can be mixed with free-flowing fillers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne un dispositif de pulvérisation pour une résine réactive, ainsi qu'un procédé de production d'une résine réactive. Le dispositif selon l'invention comprend : (a) une conduite d'écoulement (6) pour le transport et le mélange d'au moins un constituant réactif coulant avec un gaz vecteur et éventuellement d'autres additifs, (b) un piston de nettoyage (2), (c) au moins une entrée de gaz (1) pour le gaz vecteur, (d) en aval dans le sens d'écoulement, au moins un conduit d'entrée (4, 5) pour au moins un constituant réactif coulant et (e) encore plus en aval dans le sens d'écoulement, au moins un dispositif d'amenée (3) pour au moins un courant de gaz mélangé.
PCT/EP2012/052260 2011-02-15 2012-02-10 Dispositif de pulvérisation pour une résine réactive et procédé de production d'une résine réactive WO2012110407A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102011011241A DE102011011241A1 (de) 2011-02-15 2011-02-15 Sprühvorrichtung für ein Reaktivharz und Verfahren zur Herstellung desselben
DE102011011241.3 2011-02-15
DE102011012287.7 2011-02-24
DE201110012287 DE102011012287A1 (de) 2011-02-24 2011-02-24 Sprühvorrichtung für ein Reaktivharz und Verfahren zur Herstellung desselben

Publications (1)

Publication Number Publication Date
WO2012110407A1 true WO2012110407A1 (fr) 2012-08-23

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Application Number Title Priority Date Filing Date
PCT/EP2012/052260 WO2012110407A1 (fr) 2011-02-15 2012-02-10 Dispositif de pulvérisation pour une résine réactive et procédé de production d'une résine réactive

Country Status (1)

Country Link
WO (1) WO2012110407A1 (fr)

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302891A (en) 1961-07-19 1967-02-07 Flintkote Co Apparatus for spraying plastic materials
US3563459A (en) 1966-12-19 1971-02-16 Robertson Co H H Dispersion method
DE2517864A1 (de) 1974-04-29 1975-11-06 Ransburg Corp Verfahren und vorrichtung zum formen von mehrkomponenten-verbundkoerpern
US3923253A (en) 1974-05-21 1975-12-02 Grefco Spraying nozzle
DE2700488A1 (de) 1977-01-07 1978-07-13 Exxon Research Engineering Co Verfahren und vorrichtung zum mischen viskoser materialien
US6131823A (en) 1998-01-14 2000-10-17 Langeman; Gary D. Low pressure dispensing gun
WO2003037528A2 (fr) 2001-10-30 2003-05-08 Jay Roth Dispositif et procede permettant de combiner des liquides avec des charges en vue d'une application par pulverisation
US20070128372A1 (en) * 2005-12-07 2007-06-07 Hennecke Gmbh Process and device for producing coated moldings
EP1458494B1 (fr) 2001-12-14 2008-07-09 Stankiewicz GmbH Procede d'application de couches plastiques par pulverisation
DE102007016785A1 (de) 2007-04-05 2008-10-09 Hennecke Gmbh Verfahren zur Herstellung von Formteilen mit einer Schicht aus Polyurethan
WO2009052990A1 (fr) 2007-10-24 2009-04-30 Bayer Materialscience Ag Dispositif et procédé pour produire des matériaux composites renforcés à base de polyuréthane
WO2009106236A1 (fr) 2008-02-26 2009-09-03 Bayer Materialscience Ag Fabrication de mousses moulées souples de polyuréthane retardatrices de flamme
WO2009143979A1 (fr) 2008-05-28 2009-12-03 Bayer Materialscience Ag Fabrication d'un jet de projection de pur contenant des solides
WO2011023302A1 (fr) * 2009-08-26 2011-03-03 Bayer Materialscience Ag Procédé et dispositif de production d'une couche pulvérisée en matière plastique réactive
DE102010018946A1 (de) * 2010-04-30 2011-11-03 Bayer Materialscience Ag Verfahren zur Herstellung eines Feststoff enthaltenden Sprühstrahls

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302891A (en) 1961-07-19 1967-02-07 Flintkote Co Apparatus for spraying plastic materials
US3563459A (en) 1966-12-19 1971-02-16 Robertson Co H H Dispersion method
DE2517864A1 (de) 1974-04-29 1975-11-06 Ransburg Corp Verfahren und vorrichtung zum formen von mehrkomponenten-verbundkoerpern
US3923253A (en) 1974-05-21 1975-12-02 Grefco Spraying nozzle
DE2700488A1 (de) 1977-01-07 1978-07-13 Exxon Research Engineering Co Verfahren und vorrichtung zum mischen viskoser materialien
US6131823A (en) 1998-01-14 2000-10-17 Langeman; Gary D. Low pressure dispensing gun
WO2003037528A2 (fr) 2001-10-30 2003-05-08 Jay Roth Dispositif et procede permettant de combiner des liquides avec des charges en vue d'une application par pulverisation
EP1458494B1 (fr) 2001-12-14 2008-07-09 Stankiewicz GmbH Procede d'application de couches plastiques par pulverisation
US20070128372A1 (en) * 2005-12-07 2007-06-07 Hennecke Gmbh Process and device for producing coated moldings
DE102007016785A1 (de) 2007-04-05 2008-10-09 Hennecke Gmbh Verfahren zur Herstellung von Formteilen mit einer Schicht aus Polyurethan
WO2009052990A1 (fr) 2007-10-24 2009-04-30 Bayer Materialscience Ag Dispositif et procédé pour produire des matériaux composites renforcés à base de polyuréthane
WO2009106236A1 (fr) 2008-02-26 2009-09-03 Bayer Materialscience Ag Fabrication de mousses moulées souples de polyuréthane retardatrices de flamme
WO2009143979A1 (fr) 2008-05-28 2009-12-03 Bayer Materialscience Ag Fabrication d'un jet de projection de pur contenant des solides
WO2011023302A1 (fr) * 2009-08-26 2011-03-03 Bayer Materialscience Ag Procédé et dispositif de production d'une couche pulvérisée en matière plastique réactive
DE102010018946A1 (de) * 2010-04-30 2011-11-03 Bayer Materialscience Ag Verfahren zur Herstellung eines Feststoff enthaltenden Sprühstrahls

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Kunststoffhandbuch", vol. 7, CARL HANSER VERLAG

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