WO2012163495A1 - Procédé destiné à revêtir des surfaces intérieures d'objets s'étendant en longueur - Google Patents

Procédé destiné à revêtir des surfaces intérieures d'objets s'étendant en longueur Download PDF

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Publication number
WO2012163495A1
WO2012163495A1 PCT/EP2012/002192 EP2012002192W WO2012163495A1 WO 2012163495 A1 WO2012163495 A1 WO 2012163495A1 EP 2012002192 W EP2012002192 W EP 2012002192W WO 2012163495 A1 WO2012163495 A1 WO 2012163495A1
Authority
WO
WIPO (PCT)
Prior art keywords
inner surfaces
para
monomer
xylylene
dimer
Prior art date
Application number
PCT/EP2012/002192
Other languages
German (de)
English (en)
Inventor
Heinz Busch
Udo Grabowy
Original Assignee
Heinz Busch
Udo Grabowy
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 Heinz Busch, Udo Grabowy filed Critical Heinz Busch
Priority to EP12727786.1A priority Critical patent/EP2714289A1/fr
Publication of WO2012163495A1 publication Critical patent/WO2012163495A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/60—Deposition of organic layers from vapour phase
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
    • B05D3/0493—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases using vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface

Definitions

  • the invention relates to a method for coating inner surfaces of elongated objects, in particular of hoses or pipes, according to the preamble of claim 1. Furthermore, the invention relates to an apparatus for coating the inner surfaces of the elongated objects according to the preamble of claim 6. Furthermore, the invention relates to an elongate object, in particular a hose or a tube, whose inner surface by the aforementioned method and / or with the aforementioned device is coated.
  • the inner surfaces should have suitable sliding properties or constitute a diffusion barrier, which suppresses the transport of water vapor, water and solvents in and out of the hose or pipe material , Especially in the medical field, it is necessary that no particles from the inner surface as a result of frictional influences in the transported liquid or in the transported gas.
  • the inner surfaces of hoses and tubes are coated with Teflon. Teflon coating achieves the desired anti-friction properties, but due to the limited mechanical stability of Teflon, Teflon particles can be released from the surface and thus enter the blood and body.
  • parylene poly-para-xylylene
  • a further coating material is known. It is an optically transparent polymer that is applied in a vacuum by condensation from the gas phase conformal and free of so-called "pin-holes."
  • substrate materials such as metals, plastics, ceramics and paper can be coated.
  • the object of the invention is to provide a method and a device for coating inner surfaces of elongated objects, wherein coatings having different layer thicknesses within a surface are made possible.
  • the inner surfaces of the elongate objects are divided into a plurality of regions, wherein in each region the temperature for cooling the monomer and for condensing to the polymer is separately controllable or regulatable.
  • the inventive method is based on the effect that the condensation rate of the monomer to the polymer and thus the resulting layer thickness depends on the surface temperature of the objects to be coated. In this way, by adjusting the temperature on the inner surfaces of the elongate objects, the speed of the deposition process can be influenced. In particular, different layer thicknesses can be obtained in a targeted manner in the individual regions of the inner surface by setting different temperatures.
  • the dimer is provided in powder form.
  • the heating and evaporation of the dimer is preferably carried out at a temperature between 130 ° C and 170 ° C.
  • the heating and splitting of the dimer for example, at a temperature between 660 ° C and 790 ° C.
  • the method is provided for coating the inner surfaces of pipes or hoses.
  • first para-xylylene and / or at least one derivative of di-para-xylylene are provided.
  • the di-para-xylylene and / or the at least one derivative of di-para-xylylene are heated and evaporated.
  • the di-para-xylylene and / or the at least one derivative of di-para-xylylene are heated and split into a di-radical monomer.
  • the di-radical monomer is cooled and condensed on the inner surfaces of the elongated articles to poly-para-xylenes.
  • the coating device has a plurality of regions in which the temperature can be controlled or regulated separately, so that the temperature for cooling the monomer and for condensing to the polymer can be set separately in corresponding regions of the inner surfaces of the elongated articles ,
  • the device according to the invention is based on the effect that the condensation rate of the monomer to the polymer and thus the resulting layer thickness depends on the surface temperature of the objects to be coated. In this way, adjusting the temperature in the regions of the coating device makes it possible to sulting layer thickness in the corresponding areas of the inner surfaces of the elongated objects. It can be obtained in the individual areas of the inner surface by setting different temperatures targeted different layer thicknesses.
  • the device comprises a vacuum device with at least one vacuum chamber and at least one vacuum pump.
  • the coating device can be connected between two vacuum chambers, in which different pressures are set or adjustable, so that a gas stream is formed in the coating device.
  • the invention relates to an elongated article, in particular a hose or tube for medical applications, the inner surface of which is at least partially coated, the inner surface of the elongated article being coated by the above method and / or apparatus.
  • the elongated article is designed as a cardiological stent.
  • FIG. 1 shows a schematic block diagram of an apparatus for coating inner surfaces of elongated objects according to a preferred embodiment of the invention.
  • 1 shows a schematic block diagram of a device for coating inner surfaces of elongated objects 20 according to a preferred embodiment of the invention.
  • the device comprises an evaporation device 10, a reaction device 12, a first vacuum chamber 14, a coating device 16, a second vacuum chamber 18, a vacuum pump 22 and a control device 24.
  • the control device 24 is for regulating the temperatures and the pressures in the evaporation device 10, in the reaction device 12, in the vacuum chambers 14 and 18 and / or in the coating device 16 and for regulating the
  • control device 24 is coupled via electrical lines 26 to the respective components 10, 12, 14, 16, 18 and / or 22.
  • the evaporation device 10, the reaction device 12, the first vacuum chamber 14, the coating device 16, the second vacuum chamber 18 and the vacuum pump 22 are mechanically coupled one behind the other.
  • the coating device 16 is provided for receiving the elongate objects 20 whose inner surfaces are to be coated.
  • the objects 20 to be coated are provided as connections between the first vacuum chamber 14 and the second vacuum chamber 18.
  • the articles 20 to be coated are hoses and / or pipes.
  • the vacuum chamber 14 is provided for connecting the elongated objects 20 to be coated.
  • the elongated objects 20 to be coated.
  • Hoses and / or pipes are flanged to the vacuum chamber 14.
  • the other ends of the objects to be coated 20 are connected to the second vacuum chamber 1 8 connected.
  • the hoses and / or pipes can be flanged.
  • the coating device 16 has holding devices for receiving the elongate objects 20. Within the coating device 16, the temperature is separately controllable or controllable at a plurality of positions.
  • a starting material is brought into the gaseous state.
  • the temperature in the evaporator 10 is approximately between 130 ° C and 170 ° C.
  • the starting material used is preferably a powdery dimer.
  • the vaporous dimer is split in the reaction device 12 to monomers.
  • the temperature in the reaction device 12 is between 660 ° C and 790 ° C.
  • the monomer reacts to form a polymer. Since the coating device 16 is located between the first vacuum chamber 14 and the second vacuum chamber 18 and the pressure in the second vacuum chamber 18 is lower than in the first vacuum chamber 14, there is a flow of the gaseous monomer within the elongate objects 20 Temperature along the longitudinal direction of the elongated objects 20 can be varied. For example, the temperature at those ends of the elongate articles 20 located adjacent to the first vacuum chamber 14 is about 100 ° C. Along the longitudinal direction of the elongate objects 20, the temperature decreases steadily. For example, at the other ends of the elongated articles 20 located adjacent to the second vacuum chamber 14, the temperature may be about 0 ° C.
  • the exact temperatures at the two ends of the elongated articles 20 will depend on the material and intended application of the elongated objects 20 from.
  • the deposition rate of the polymer on the inner surfaces of the elongated articles 20 depends on their temperature. By controlling or regulating the temperature within certain regions of the elongate objects 20, a uniform coating in these areas is thereby made possible. By adjusting the temperature, a specific layer thickness can thus be achieved in predetermined regions of the elongate objects 20. Due to a different temperature setting, 20 thinner or thicker layers can be deposited in other areas of the elongated objects. In this way, the inner surface of the elongated article 20 can be provided with layers of different thickness. The different layer thicknesses for the different areas can be adjusted specifically by the regional control or regulation of the temperature.
  • the elongated object 20, whose inside is to be coated associated with a plurality of contact elements.
  • the contact elements are arranged in series along the elongated article 20. In this case, each contact element completely or partially surrounds each a portion of the elongate object 20.
  • the contact elements are made of a material having high thermal conductivity.
  • the contact elements are made of metal, preferably of aluminum.
  • the contact elements may be formed, for example, as a hollow body or profile sections.
  • the contact elements have a groove or passageway provided for receiving the elongated article 20.
  • the contact elements may be formed, for example, as a hollow body or profile sections.
  • the contact elements have a groove or passageway provided for receiving the elongated article 20.
  • the arranged in series contact elements are thermally insulated from each other.
  • an insulation made of a material with high thermal conductivity is located between two adjacent contact elements.
  • the adjacent contact elements are spaced apart and separated by an air gap.
  • the series of contact elements may be mounted on a heat-insulating material, so that the heat loss of the contact elements as well as the heat exchange between the contact elements are minimized.
  • each contact element one or more heating elements are mounted.
  • electrical heating elements are used for this purpose.
  • one or more temperature sensors are mounted in or on each contact element. This allows the temperatures at each contact element to be adjusted independently of each other. In this way, each portion of the elongated article 20, which is associated with a respective contact element, are subjected to an individual temperature. As a result, the layer thickness for each section of the elongated object 20 can be adjusted separately.
  • di-para-xylylene is used as starting material for the coating process.
  • halogenated substituents can be used.
  • the di-para-xylylene forms a stable compound at temperatures below 150 ° C.
  • the di-para-xylylene is evaporated. This takes place in the evaporation device 10, for example in an evaporation vessel.
  • the temperature in the evaporation device 10 is approximately between 130 ° C and 170 ° C.
  • the vaporized di-para-xylylene is passed through a high temperature zone.
  • the high temperature zone is located in the reaction device 12.
  • pyrolysis forms in the high temperature zone, a highly reactive di-radical monomer.
  • the temperature is between 660 ° C and 790 ° C.
  • the di-radical monomer immediately reacts on a surface in a third step to form the chain-shaped polymer poly-para-xylylene. This takes place in the coating device 16.
  • the method and apparatus exploited the fact that the rate of condensation, i. the deposition of poly-para-xylylene on a surface depends very much on the surface temperature. Thus, at a temperature of more than 150 ° C. or 160 ° C., no formation of polyparaxylylene occurs on the surface of a substrate to be coated, and thus no layer structure. Furthermore, the film forming rate can be increased when the substrate is cooled and the heat is dissipated from the surface.
  • Poly-para-xylylene-coated hoses and tubes have high biocompatibility and good sliding properties, making them particularly suitable for medical applications. Especially for
  • Implants is suitable for poly-para-xylylene and has been tested many times. There are FDA approvals for poly-para-xylylene-coated implants, such as cardiological stents. Due to its physical and chemical properties, the poly-para-xylylene also makes difficult areas and structures, such as points, undercuts, sharp edges and narrow gaps coated completely, evenly and without pores. It can be applied in a single operation layers with a thickness of 0.1 ⁇ to 50 ⁇ .
  • Poly-para-xylylene also serves as corrosion protection. Furthermore, poly-para-xylylene is also suitable as a base layer for a system based thereon for the application of pharmacotherapies.
  • Poly-para-xylylene is optically transparent. Poly-para-xylylene can be applied to almost all substrate materials such as metals, plastics, ceramics, and paper.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

L'invention concerne un procédé destiné à revêtir des surfaces intérieures d'objets s'étendant en longueur (20), notamment de tubes et/ou de tuyaux. On prépare, réchauffe et évapore au moins un dimère. Ensuite, on augmente la température dudit dimère et on le dégrade pour obtenir au moins un monomère. Ledit monomère subit un refroidissement et une condensation sous forme d'un polymère aux surfaces intérieures des objets s'étendant en longueur (20). Les surfaces intérieures des objets s'étendant en longueur (20) sont divisées en une pluralité de zones, la température destiné à refroidir ledit monomère et à provoquer la condensation sous forme d'un polymère pouvant être commandée ou réglée séparément dans chacune des zones. En outre, l'invention concerne un dispositif correspondant qui est destiné à revêtir des surfaces intérieures d'objets s'étendant en longueur (20). Enfin, l'invention concerne un objet s'étendant en longueur, s'agissant notamment un tuyau ou d'un tube, dont la surface intérieure est revêtue au moyen du procédé précité et/ou au moyen du dispositif précité.
PCT/EP2012/002192 2011-05-31 2012-05-23 Procédé destiné à revêtir des surfaces intérieures d'objets s'étendant en longueur WO2012163495A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12727786.1A EP2714289A1 (fr) 2011-05-31 2012-05-23 Procédé destiné à revêtir des surfaces intérieures d'objets s'étendant en longueur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011103737A DE102011103737A1 (de) 2011-05-31 2011-05-31 Verfahren zum Beschichten von inneren Oberflächen langgestreckter Gegenstände
DE102011103737.7 2011-05-31

Publications (1)

Publication Number Publication Date
WO2012163495A1 true WO2012163495A1 (fr) 2012-12-06

Family

ID=46317323

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/002192 WO2012163495A1 (fr) 2011-05-31 2012-05-23 Procédé destiné à revêtir des surfaces intérieures d'objets s'étendant en longueur

Country Status (3)

Country Link
EP (1) EP2714289A1 (fr)
DE (1) DE102011103737A1 (fr)
WO (1) WO2012163495A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003039617A1 (fr) * 2001-11-02 2003-05-15 Boston Scientific Limited Procede de depot par evaporation sous vide pour produire un stent-greffon
WO2007003502A2 (fr) * 2005-07-01 2007-01-11 Siemens Aktiengesellschaft Revetement de parylene et procede pour produire un revetement de parylene
US20070276486A1 (en) * 2006-05-25 2007-11-29 E. Benson Hood Laboratories Coated tracheostomy tube and stoma stent or cannula
US20090238968A1 (en) * 2005-03-24 2009-09-24 Masanobu Hatanaka Method for Producing Component for Vacuum Apparatus, Resin Coating Forming Apparatus and Vacuum Film Forming System
WO2009151492A2 (fr) * 2008-04-16 2009-12-17 Northeast Maritime Institute, Inc. Procédé de revêtement de métaux et de dispositifs électroniques à usage maritime et autre environnements

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USH1824H (en) * 1997-08-01 1999-12-07 The United States Of America As Represented By The Secretary Of The Navy Vapor deposition of a thin polymer film on solid propellant rocket grain surface

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003039617A1 (fr) * 2001-11-02 2003-05-15 Boston Scientific Limited Procede de depot par evaporation sous vide pour produire un stent-greffon
US20090238968A1 (en) * 2005-03-24 2009-09-24 Masanobu Hatanaka Method for Producing Component for Vacuum Apparatus, Resin Coating Forming Apparatus and Vacuum Film Forming System
WO2007003502A2 (fr) * 2005-07-01 2007-01-11 Siemens Aktiengesellschaft Revetement de parylene et procede pour produire un revetement de parylene
US20070276486A1 (en) * 2006-05-25 2007-11-29 E. Benson Hood Laboratories Coated tracheostomy tube and stoma stent or cannula
WO2009151492A2 (fr) * 2008-04-16 2009-12-17 Northeast Maritime Institute, Inc. Procédé de revêtement de métaux et de dispositifs électroniques à usage maritime et autre environnements

Also Published As

Publication number Publication date
EP2714289A1 (fr) 2014-04-09
DE102011103737A1 (de) 2012-12-06

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