EP2809454A1 - Revêtement plasma hydrophilisant - Google Patents

Revêtement plasma hydrophilisant

Info

Publication number
EP2809454A1
EP2809454A1 EP13703729.7A EP13703729A EP2809454A1 EP 2809454 A1 EP2809454 A1 EP 2809454A1 EP 13703729 A EP13703729 A EP 13703729A EP 2809454 A1 EP2809454 A1 EP 2809454A1
Authority
EP
European Patent Office
Prior art keywords
gas
workpiece
coating
inert gas
pressure
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP13703729.7A
Other languages
German (de)
English (en)
Inventor
Martin GÖRNE
Thomas Kordick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bioenergy Capital AG
Original Assignee
Bioenergy Capital 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
Application filed by Bioenergy Capital AG filed Critical Bioenergy Capital AG
Priority to EP13703729.7A priority Critical patent/EP2809454A1/fr
Publication of EP2809454A1 publication Critical patent/EP2809454A1/fr
Withdrawn legal-status Critical Current

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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
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
    • A61F2/16—Intraocular lenses
    • A61F2/1613—Intraocular lenses having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/28—Materials for coating prostheses
    • A61L27/34—Macromolecular materials
    • 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
    • B05D1/62—Plasma-deposition of organic layers
    • 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
    • B05D3/14—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 electrical means
    • B05D3/141—Plasma treatment
    • B05D3/142—Pretreatment
    • B05D3/144—Pretreatment of polymeric substrates
    • 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
    • B05D5/04—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a surface receptive to ink or other liquid
    • 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
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/056—Forming hydrophilic coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/04—Contact lenses for the eyes
    • G02C7/049—Contact lenses having special fitting or structural features achieved by special materials or material structures
    • 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
    • B05D2201/00—Polymeric substrate or laminate
    • 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
    • B05D2502/00—Acrylic polymers
    • 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
    • B05D3/0466—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 the gas being a non-reacting gas
    • 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
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • 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
    • C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
    • C08J2383/04—Polysiloxanes
    • 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
    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2433/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31913—Monoolefin polymer

Definitions

  • the present invention relates to the surface treatment of workpieces based on biomaterials and, more particularly, to a permanent hydrophilization of surfaces of such workpieces by plasma assisted chemical vapor deposition (PECVD) followed by chemical vapor deposition (CVD).
  • PECVD plasma assisted chemical vapor deposition
  • CVD chemical vapor deposition
  • the biocompatibility of workpieces intended for temporary or permanent use on human or animal organs, such as contact lenses or implants, is set to high standards in order to avoid inflammation processes.
  • materials are used for the production of such workpieces, the properties of which predestine them both for the respective intended use and the associated tissue contact.
  • the biocompatibility of materials also known as biocompatibility, is to a large extent influenced by their surface properties.
  • a hydrophilic surface is crucial for good biocompatibility.
  • a hydrophilic surface of polymeric framework substances favors their colonization by tissue cells and thus the therapeutic success.
  • a hydrophilic surface of the polymeric substrate is advantageous in order to fix the cells.
  • Biocompatible hydrophilization of surfaces of polymeric biomaterials may be such. As described in international application WO 99/57177, can be achieved by modifying the polymer surface by means of plasma oxidation. However, it has been found that such hydrophilized surfaces are not sufficiently long-term stable.
  • a more durable hydrophilization of polymeric biomaterial surfaces is achieved by coating them with a hydrophilic, achieved biocompatible material.
  • PMMA polymethyl methacrylate
  • US Pat. No. 5,080,924 proposes, for example, a plasma deposition process for polymerizing the surfaces with polyacrylic acid.
  • the polymerized PMMA surfaces show wetting angles for water in the range of 35 to 50 degrees and are too large for a sufficient wetting of the material surfaces.
  • the coating must be further treated, for example by applying a further biocompatible material other than acrylic acid which crosslinks with the polyacrylic acid.
  • a further biocompatible material other than acrylic acid which crosslinks with the polyacrylic acid.
  • Such a coating comprises a method for hydrophilizing surfaces of polymeric workpieces, the method comprising a step (a) for cleaning and activating the workpiece surfaces in the course of a pretreatment with a high-frequency gas plasma formed on the basis of an inert gas, a step (b) for precoating the pretreated ones Workpiece surfaces with polyacrylic acid using a high frequency gas plasma generated from a gas mixture, the gas mixture being composed of an inert gas and a first gas formed from biocompatible polymerizable carboxy group-containing monomers, and a step (c) for subsequently coating the precoated workpiece surfaces using a substantially acrylic acid monomer second gas.
  • the coating further comprises providing a polymeric workpiece having a hydrophilicizing surface coating of polyacrylic acid which is one of those specified above Steps, wherein the wetting angle of water on the polyacrylic acid coated workpiece surface has a value in the range of 2 to less than 10 degrees.
  • the workpieces coated with the specified method have a permanently hydrophilic surface of excellent wetting ability resulting in good biocompatibility on contact with body tissue, whereby irritation of the eye is less frequent with appropriately coated contact lenses and easily adhere body cells to suitably coated tissue engineering builders , Unless otherwise clear from the context, throughout the specification and claims, the words “comprising,” “comprising,” “including,” “containing,” “having,” and the like, as well as their grammatical modifications, are intended to be embraced by Contrary to an exclusive or exhaustive meaning; that means in the sense of "including, but not limited to”.
  • the biocompatible, polymerizable carboxy group-containing monomers forming the first gas are selected from (meth) acrylic acid and (meth) acrylic anhydride, whereby a high proportion of acrylic acid monomers is generated in the high-frequency plasma, which corresponds to the in step (a ) of the process activated workpiece surface to form covalent bonds.
  • the gas used in step (a) of the method for forming the high-frequency ⁇ plasmas contains the first gas in an amount corresponding to a partial pressure of less than one tenth of the partial pressure of the inert gas, so that an effective cleaning and activation of the Workpiece surface is ensured.
  • step (b) a gas mixture is used the partial pressure of the first gas is at least a quarter and at most twice the partial pressure of the inert gas.
  • the inert gas partial pressure of the second gas used in step (c) is preferably less than one-tenth of the partial pressure of the acrylic acid monomer gas in embodiments.
  • argon is used as the inert gas.
  • the coating applied in step (b) is monitored by means of a film thickness control device and terminated upon reaching a layer thickness value selected from the range of 50 to 400 ⁇ .
  • the pressure of the inert gas for the high frequency plasma in step (a) has a value in the range of 15 to 60 mTorr (about 2 to 8 Pa) and the pressure of the first gas for the high-frequency plasma in step (b) has a value in the range of 30 to 90 mTorr (about 4 to 12 Pa).
  • embodiments further comprise a step (cb) immediately following step (b) comprising throttling the inert gas supply and supplying the second gas, the pressure of the second gas being less than zero in step (c) , 3 mTorr (about 40 mPa).
  • Embodiments further include a step (bc) immediately preceding step (b), or if executed, step (cb), then turning off the high frequency plasma, interrupting the inert gas supply to promote deposition and crosslinking of acrylic acid monomers on the precoated workpiece surface and supplying the second gas, wherein the pressure of the second gas in step (c) is between 1.5 and 6 torr (about 0.13 to 0.8 kPa).
  • step (d) subsequent to step (c) for removing water-soluble constituents from the hydrophilization layer by rinsing the coated workpiece in a hydrophilic solvent, such as e.g. B.
  • the workpiece has, at least on its surface, a material which is predominantly or substantially formed from a silicone, in particular poly (dimethylsiloxane), a silicone hydrogel or a porous bioresorbable polymer such as PLA or PLGA.
  • a material which is predominantly or substantially formed from a silicone, in particular poly (dimethylsiloxane), a silicone hydrogel or a porous bioresorbable polymer such as PLA or PLGA The thickness ranges of the workpieces in embodiments which are based on the former case relevant for contact lenses, preferably between 50 and 300 ⁇ , between 5 and 40 ⁇ , or between 2 and 12 pm.
  • the thickness of the coating is preferably between 5 and 40 nm in embodiments with porous PLA or PLGA.
  • the workpieces are silicone contact lenses.
  • the hydrophilizing surface coating of these workpieces produced by the process is formed by a PAA layer with an average thickness of 5 to 40 ⁇ m.
  • the workpieces are a porous matrix of poly (a-hydroxycarboxylic acids).
  • the hydrophilizing surface coating of these workpieces produced by the process is formed by a PAA layer having an average thickness of 5 to 40 nm.
  • Figure 1 is a schematic diagram illustrating a system for biocompatible coating of polymeric biomaterials
  • FIG. 2 shows a flowchart for illustrating that for a
  • FIG. 3 shows a fluorescence diagram for illustrating the layer thickness achieved with the method according to FIG.
  • the diagram shown in Figure 1 illustrates the essential components of a device 100 for coating polymeric workpieces 90 with a hydrophilic material forming the surface thereof.
  • the workpieces are preferably either contact lenses and in this case preferably those made of a silicone or a silicone hydrogel, or a tissue engineering suitable, preferably from PLA (polylactide) or PLGA (polylactide-co-glycolide) formed polymeric framework structure.
  • the device 100 comprises an evacuable recipient 10 with a device for generating a high-frequency plasma in the interior 15 of the recipient 10.
  • the device for generating a high-frequency plasma is symbolized in the diagram of Figure 1 by means of two electrodes 11 and 12, but not limited to the use of electrodes , It should be noted that in FIG. 1, only those components which are considered necessary for the understanding of the invention are shown with a view to a clear and clear presentation. Components, such. As pumps for evacuating the recipient 10, which are indeed essential for the operation of the device, for the understanding of The invention, however, without meaning, are assumed to be present in the context of this disclosure despite the lack of representation.
  • the interior 15 of the recipient 10 is at least one vacuum or low pressure measuring device 13 and a coating order measuring device 14, for example, a quartz crystal assigned.
  • Coating apparatus 100 further includes an inert gas source 21 and one or more coating material sources 22 and 23.
  • Each of the sources or source containers 21, 22 and 23 is connected in each case via one of the lines 71, 72 and 73 to the recipient 10, that in the sources held in stock gaseous or vaporized substances in the interior 15 of the recipient 10th can be directed.
  • control valves 41, 42 and 43 allow a regulation of the respective gas or vapor flow in the recipient 10.
  • the control valves can alternatively be used for venting the source containers 21, 22 and 23 , In other embodiments, dedicated valves and possibly also separate lines are used for this purpose.
  • the device 100 further includes a controller 80, the z. B. is formed by means of control lines 61, 62, 63, 64, 65 and signal lines 66 and 67 for optionally controlled control of coating processes.
  • the controller may be designed to execute fully automatic or semi-automatic coating processes or to optionally fully or partially automatic coating control. It should be noted in this context that deviating from the German usage in this document is not distinguished between the terms tax and rules. Rather, both terms are used synonymously, ie the term taxes can also include a return of a controlled variable or its measured value, as the term rules can refer to a simple control chain. This also applies to grammatical modifications of these terms.
  • a controlled (partial) control of the device 100 may, for. B.
  • control device 80 may be designed to monitor the growth of a coating by means of the coating application measuring device 14 and to terminate upon reaching the desired coating thickness.
  • controller 80 is usually designed for process-process-dependent control of the high-frequency device 11 and 12.
  • Flowchart 200 of Figure 2 illustrates the essential steps of a method of hydrophilizing workpiece surfaces by coating with polyacrylic acid.
  • polymeric biomaterials form the materials used to make the workpieces 90 and their surface areas respectively, the term "biomaterial” meaning all materials which, e.g. B. in the context of therapeutic or diagnostic measures, for contact with biological tissue or body fluids are provided.
  • step S0 which optionally includes cleaning the workpieces and placing them in the recipient 10, and then evacuating the recipient
  • the workpiece surfaces are first prepared in step S1 for a subsequent coating.
  • the recipient 10 loaded with the workpiece (s) is first evacuated by means of pumps (not shown in the figures), preferably to a maximum pressure of 10 -4 mbar (10 mPa).
  • the recipient interior 15 is flooded with continuous pumping with an inert gas, preferably argon, wherein the Inertgaszulig is tuned to the pump power, that forms a constant gas pressure in the interior 15 of the recipient 10.
  • the inert gas 31 is supplied to the recipient from an inert gas source 21.
  • the so set argon gas pressure is about 25 mTorr (about 3.33 Pa).
  • the plasma generator such as a high voltage generator, is turned on, thereby creating an inert gas plasma surrounding the workpieces 90.
  • the plasma cleans the workpiece surfaces by removing substances adsorbed thereon and also results in activation of the workpiece surfaces by formation of ions and free radicals, which promote the subsequent polymerization process.
  • the cleaning and activation effect can be influenced in this first step Sl by the frequency of the gas plasma, the power fed into the plasma, the exposure time of the plasma and the type of inert gas used for the plasma, as is generally known.
  • the settings suitable for the respective application can be determined in the usual way by a person skilled in the art.
  • Argon is preferred as an inert gas in the process presented here, since it enables activation of the material surfaces without generating new undesired compounds. Of course, other inert gases can be used instead if they lead to comparable results.
  • the exposure time of the argon plasma is about one minute. After expiration of the exposure time, the plasma generator is switched off and the process continues with the first coating step S2.
  • the plasma used for workpiece preparation can also be produced on the basis of a mixture of inert gas and a reactive component used in the subsequent precoating process, instead of on the basis of pure argon.
  • the partial pressure of the reactive component in the gas mixture should be less than one tenth of the partial pressure of the inert gas.
  • the inert gas flow into the recipient interior is preferably maintained and optionally changed so that it has a value suitable for carrying out step S2.
  • the inert gas in the recipient 10 is made of a biocompatible, polymerizable carboxy group-containing Monomers mixed in the vapor phase formed first layer material gas.
  • the carboxy group-containing monomers are preferably acrylic acid or an acrylic acid precursor, such as. B. (meth) acrylic anhydride.
  • the partial pressure P e SG of the first layer material gas in embodiments is preferably at least a quarter and at most twice the partial pressure p IG of the inert gas.
  • the partial pressure ratio Pe SG : P Ig is selected from a range of 1: 1 to 1: 0.5.
  • the partial pressure of argon is 30 mTorr (about 400 mPa) at a total pressure of the gas mixture of 45 mTorr (about 600 mPa), giving a value of 2: 1 with respect to the ratio of argon partial pressure p Ar to first Layer material gas partial pressure (reactive component partial pressure)? E SG results.
  • (meth) acrylic anhydride As a reactive component for the formation of the first layer material gas (meth) acrylic anhydride is preferably used, which is converted in one of the illustrated in Figure 1 container 22 or 23 in the vapor phase and passed via line 72 or 73 into the interior 15 of the recipient 10. The partial pressure of the laminar gas is adjusted via its inflow, which is controlled by means of the valves 42 or 43.
  • (meth) acrylic acid can also be used instead of (meth) acrylic anhydride.
  • (Meth) acrylic acid or (meth) acrylic anhydride are provided in the source containers 22 or 23 in liquid form, for example in an amount of 150 ml. In order to prevent or delay polymerization of the acrylic acid or its precursor materials, these can be mixed with Cu (I) chloride.
  • the reactive component containers 22 and 23 are vented after filling until no more bubbles rise in the reactive component liquid.
  • the vapor pressure of the reactive components is usually sufficient at the usual room temperatures of 22 to 25 ° C to form the first layer material gas.
  • the actual precoating process is initiated by starting the plasma generator, thereby producing plasma generated acrylic monomers excited attach to the activated workpiece surface and form a polyacrylic acid layer thereafter.
  • This plasma-assisted pre-coating phase is maintained until a predetermined layer thickness has been reached.
  • the growth of the coating is monitored continuously using the coating order measuring device 14.
  • coatings can be deposited with thicknesses of up to 30,000 nm, or 30 pm, wherein a respective coating process is terminated when the coating order measuring device 14, the achievement of the desired coating thickness within a predetermined tolerance of z. B. 50 to 400 ⁇ indicates.
  • the thickness of the hydrophilic coating to be deposited in the precoating process depends on the particular application and is usually in the range of 30 to 50 nm for tissue engineering scaffolds. Pre-coatings having thicknesses in the range from about 5 to 40, for example, have been used to hydrophilate contact lenses nm proved to be suitable. Depending on the application and thus the coating thickness to be achieved, the pre-coating phase can take between 10 and 80 or even 120 minutes.
  • the gas supplies are preferably not changed during the plasma coating. In a first variant of the method, the precoating process is terminated by switching off the plasma generator.
  • the described first variant of the pre-coating step S2 is followed by a first variant of the subsequent coating step S3, in which, after the plasma generator has been switched off, the inert gas inflow is interrupted and the precoated workpiece surface is exposed to the fullest possible vapor pressure of a reactive component formed by anhydrous acrylic acid.
  • the vapor pressure of the reactive component should not be less than 5 Torr (about 667 Pa). Slight cooling or heating of the reactive component in the source container 22 or 23 may be expedient for pressure adjustment.
  • the introduction of the reactive component into the receiver 10 at full vapor pressure provides reactive gas in large quantities, which reacts with the reactive sites present on the precoated surface and builds up a comparatively thick layer of polyacrylic acid (PAA), which may be crystalline.
  • PAA polyacrylic acid
  • FIG. 3 shows a measurement diagram from which it can be deduced that a PAA layer produced as described above has a thickness of approximately 10.sup.-1.
  • the hydrophilic PAA layer was stained with rhodamine 6G as a fluorescent dye and the fluorescence was measured with thickness-resolved confocal microscopy.
  • the hydrophilic layer as is clear at the right-hand portion of the fluorescence waveform, extends recognizably into the depth of the workpiece.
  • the measured in Figure 3 contact lens has a thickness of 117.5 ⁇ ⁇ . The resolution of the measurement is 0.6 pm.
  • the method is therefore particularly advantageous for use on silicone contact lenses, where hydrophilicity of the surface, durability of the coating and their optical properties are equally important.
  • the plasma generator is not switched off at the end of the precoating step S2 and is therefore still in operation during the transition to the second variant of the subsequent coating step S3.
  • the argon supply is almost or completely stopped and the supply of the reactive gas, ie the acrylic acid, so far reduced that, with maintained high frequency generation and continuous evacuation of the recipient 10, a pressure balance in the range of less than 0.3 mTorr ( about 40 mPa) is set.
  • the pressure is set to a value less than 0.1 mTorr (about 13 mPa).
  • This post-coating phase is maintained for 5 to 15 minutes and results in porous resorbable builders for tissue engineering in workpiece surfaces, which have particularly low contact angles for water and excellent cell attachment rates of, for example, 10-20 minutes. B. over 90% or more than 95%.
  • the described second variant of the method is therefore particularly suitable for the production of coated framework substances which are suitable for infiltration of cells in the Framework of tissue engineering.
  • the coated workpieces 90 may be removed from the recipient and optionally subjected to quality control.

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medicinal Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Transplantation (AREA)
  • Veterinary Medicine (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Vascular Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Dermatology (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Materials For Medical Uses (AREA)
  • Eyeglasses (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Chemical Vapour Deposition (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé d'hydrophilisation de surfaces de pièces en polymère, le procédé comprenant : une étape (a) de prétraitement des surfaces de pièces dans un plasma gazeux haute fréquence formé sur la base d'un gaz inerte, pour nettoyer et activer les surfaces de pièces ; une étape (b) de pré-revêtement des surfaces de pièces prétraitées avec un acide polyacrylique en utilisant un plasma haute fréquence produit à partir d'un mélange gazeux, le mélange gazeux étant composé d'un gaz inerte et d'un premier gaz biocompatible, polymérisable, contenant des groupes carboxyles ; et une étape (c) de revêtement ultérieur des surfaces de pièces pré-revêtues en utilisant un deuxième gaz contenant essentiellement des monomères d'acide acrylique.
EP13703729.7A 2012-02-01 2013-02-01 Revêtement plasma hydrophilisant Withdrawn EP2809454A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13703729.7A EP2809454A1 (fr) 2012-02-01 2013-02-01 Revêtement plasma hydrophilisant

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP20120000648 EP2623215B1 (fr) 2012-02-01 2012-02-01 Revêtement par plasma hydrophile
EP13703729.7A EP2809454A1 (fr) 2012-02-01 2013-02-01 Revêtement plasma hydrophilisant
PCT/EP2013/000329 WO2013113518A1 (fr) 2012-02-01 2013-02-01 Revêtement plasma hydrophilisant

Publications (1)

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EP2809454A1 true EP2809454A1 (fr) 2014-12-10

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EP20120000648 Not-in-force EP2623215B1 (fr) 2012-02-01 2012-02-01 Revêtement par plasma hydrophile
EP13703729.7A Withdrawn EP2809454A1 (fr) 2012-02-01 2013-02-01 Revêtement plasma hydrophilisant

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US (2) US9173974B2 (fr)
EP (2) EP2623215B1 (fr)
JP (1) JP5855769B2 (fr)
KR (1) KR101547437B1 (fr)
CN (1) CN104271261B (fr)
AU (1) AU2013214506A1 (fr)
BR (1) BR112014019093A8 (fr)
CA (1) CA2863553A1 (fr)
DK (1) DK2623215T3 (fr)
ES (1) ES2472722T3 (fr)
HR (1) HRP20140598T1 (fr)
IN (1) IN2014DN07264A (fr)
ME (1) ME01889B (fr)
PL (1) PL2623215T3 (fr)
PT (1) PT2623215E (fr)
RS (1) RS53400B (fr)
RU (1) RU2014135279A (fr)
SG (1) SG11201404480TA (fr)
SI (1) SI2623215T1 (fr)
WO (1) WO2013113518A1 (fr)

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JP2017007157A (ja) * 2015-06-18 2017-01-12 東海光学株式会社 親水膜付き基材及びその製造方法
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DE102018127812B4 (de) * 2018-11-07 2020-06-18 Fachhochschule Kiel Kontaktlinse mit einer Oberflächenbeschichtung und Herstellungsverfahren
CN111171360A (zh) * 2020-02-28 2020-05-19 广州洁特生物过滤股份有限公司 细胞培养装置表面改性方法及细胞培养装置
CN111320779A (zh) * 2020-02-28 2020-06-23 广州洁特生物过滤股份有限公司 基材表面改性方法及细胞培养装置
KR20210122994A (ko) 2020-04-02 2021-10-13 주식회사 비케이이앤씨 딥 코팅방법
CN117203571A (zh) * 2021-04-19 2023-12-08 国立研究开发法人物质·材料研究机构 软质眼镜片及其制造方法
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Publication number Publication date
JP2015511993A (ja) 2015-04-23
PL2623215T3 (pl) 2014-09-30
CA2863553A1 (fr) 2013-08-08
ES2472722T3 (es) 2014-07-02
EP2623215A1 (fr) 2013-08-07
US20160053063A1 (en) 2016-02-25
RU2014135279A (ru) 2016-03-27
PT2623215E (pt) 2014-07-11
BR112014019093A2 (fr) 2017-06-20
US9173974B2 (en) 2015-11-03
AU2013214506A1 (en) 2014-09-25
JP5855769B2 (ja) 2016-02-09
EP2623215B1 (fr) 2014-03-26
KR20140132347A (ko) 2014-11-17
ME01889B (me) 2014-12-20
SI2623215T1 (sl) 2014-09-30
BR112014019093A8 (pt) 2017-07-11
IN2014DN07264A (fr) 2015-04-24
SG11201404480TA (en) 2014-11-27
RS53400B (en) 2014-10-31
WO2013113518A1 (fr) 2013-08-08
KR101547437B1 (ko) 2015-08-25
DK2623215T3 (da) 2014-06-30
US20140336758A1 (en) 2014-11-13
HRP20140598T1 (hr) 2014-09-12
CN104271261A (zh) 2015-01-07
CN104271261B (zh) 2016-02-10

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