EP0289996A2 - Process for the production of a hydrophilic coating on a moulded part, and razor manufactured by applying the process - Google Patents

Process for the production of a hydrophilic coating on a moulded part, and razor manufactured by applying the process Download PDF

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Publication number
EP0289996A2
EP0289996A2 EP88107114A EP88107114A EP0289996A2 EP 0289996 A2 EP0289996 A2 EP 0289996A2 EP 88107114 A EP88107114 A EP 88107114A EP 88107114 A EP88107114 A EP 88107114A EP 0289996 A2 EP0289996 A2 EP 0289996A2
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EP
European Patent Office
Prior art keywords
solution
razor
polyvinylpyrrolidone
water
razor blade
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.)
Granted
Application number
EP88107114A
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German (de)
French (fr)
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EP0289996B1 (en
EP0289996A3 (en
Inventor
Wolfgang Althaus
Jochen Thöne
Helmut Ritter
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Wilkinson Sword GmbH
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Wilkinson Sword GmbH
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Priority to AT88107114T priority Critical patent/ATE69181T1/en
Publication of EP0289996A2 publication Critical patent/EP0289996A2/en
Publication of EP0289996A3 publication Critical patent/EP0289996A3/en
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Publication of EP0289996B1 publication Critical patent/EP0289996B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/40—Details or accessories
    • B26B21/44—Means integral with, or attached to, the razor for storing shaving-cream, styptic, or the like
    • B26B21/443—Lubricating strips attached to the razor head
    • 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
    • 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
    • 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
    • B05D2202/00—Metallic substrate

Definitions

  • the invention relates to a process for the formation and application of a hydrophilic coating which is highly lubricious in the moist state on a molded part made of plastic or metal, in particular a razor or razor blade unit, in which a solution containing a water-soluble polymer, in particular polyvinylpyrrolidone, is applied to the molded part and cured there becomes.
  • the invention further relates to a razor or a razor blade unit with at least one razor blade held on a blade support and a surface adjacent to the razor blade that sweeps over the skin of the user during the shaving process, in particular a cap made of plastic, such as polystyrene or ABS, or of metal that is coated with a the lubricity-increasing device is provided.
  • a razor made of plastic in which at least one razor blade is arranged between a razor blade support and a cap.
  • the shaver head has an integral solid and water soluble shaving aid.
  • the shaving aid is provided in the form of a strip made of the solid but water-soluble material, the strip being arranged in an adjacent position to the razor blade and being attached either to the blade support or to the cap.
  • a microencapsulated silicone oil, polyethylene oxide, a nonionic polyacrylamide or a polysaccharide is provided as the water-soluble material.
  • a disadvantage of the known razor is that the substance acting as a lubricant detaches from the carrier body and is deposited on the skin of the user in the form of a film. There is thus the risk of causing skin irritation as well as the need to rinse off the lubricating film that dries on already shaved skin, which can be difficult depending on the hardness of the water available.
  • the construction of the razor with a plastic strip arranged in a recess is complex and it is not possible to move the strip into the actual vicinity of the cutting edge of the razor blade. In principle, therefore, the known sliding strip is only to be positioned at a location on the shaving apparatus which is unfavorable for the desired usage properties.
  • a molded body made of a polymeric substrate and a coating layer applied to this substrate is also known, in which it consists of a polyvinylpyrrolidone-polyurethane interpolymer.
  • Various applications, such as contact lenses, catheters, peristaltic pump chambers, condoms and the like, are mentioned for such a shaped body, in which it is desirable to use a material, such as polyurethane, an acrylic acid polyester or a vinyl resin, which has a lower content in the moist state Has a coefficient of friction that is otherwise the case with such materials is possible.
  • a material such as polyurethane, an acrylic acid polyester or a vinyl resin, which has a lower content in the moist state Has a coefficient of friction that is otherwise the case with such materials is possible.
  • such requirements do not exist with conventional shavers and it is also not common to use such materials, in particular a polyurethane.
  • the razors and razor blade unit are made of polystyrene, the properties of which are not comparable.
  • a coating applied by the process according to DE-PS 28 28 617 would not adhere to polystyrene. It is proposed there that a solution of a polyisocyanate is applied to the substrate and, after the solvent has evaporated, a solution of polyvinylpyrrolidone is applied to the substrate treated in this way, after which the solvent is evaporated to give a polyvinylpyrrolidone-polyurethane interpolymer.
  • the invention has for its object to improve a method of the type mentioned while avoiding the above disadvantages in such a way that the production of molded parts made of plastic or metal, in particular razors or razor blade units or their parts, high lubricity is possible in the moist state, the The coating also adheres well to polystyrene or ABS or metal and should be applied and hardened in a short time.
  • the invention is based on the objective of improving the sliding properties of a razor, particularly in the area close to the blade, in a way which prevents substances in the manner of a lubricant from depositing on the skin of the user.
  • the solution to be applied to the molded part consists of the water-soluble polymer, in particular poly-N-vinylpyrrolidone or a copolymer thereof, one or more radically polymerizable vinyl monomers and a photoinitiator which decomposes into free radicals when irradiated and that the applied one Solution for curing is exposed to UV radiation.
  • the solution then hardens quickly to a well-adhering coating of controlled layer thickness, which has a greatly reduced coefficient of friction on contact with the skin when wet.
  • the solution preferably contains 0.1 to 90% by weight of polyvinylpyrrolidone, in particular 5 to 30% by weight of polyvinylpyrrolidone, based on the vinyl monomers used.
  • the average molecular weight of polyvinylpyrrolidone can be different values from 15,000 to 800,000 g / mol, preferably 200,000 to 500,000 g / mol.
  • copolymers of pyrrolidone with, for example, maleinates or acrylates in the sense of the invention can also be used.
  • Other water-soluble polymers such as polyvinyl alcohol, polymers containing polyacrylamide, polysaccharides or polyethylene oxide, are also suitable as additives.
  • Radically polymerizable vinyl monomers suitable for the purposes of the invention are preferably acrylic acid, methacrylic acid and their derivatives and mixtures of styrene and maleic acid or fumaric acid-containing polyester resins.
  • examples are cyclic or open-chain ether groups containing acrylic acid esters or methacrylic acid esters, such as esters of mono- or poly-ethoxylated or propoxylated C1 - C20 alcohols, THF-carbinol acrylate or THF-carbinol methacrylate, hydroxyalkyl esters, such as 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate Hydroxypropyl methacrylate, N, N-dimethylamino-2-hydroxyethyl acrylate, N, N-dimethylaminoethyl metharylate or salts thereof, such as N, N, N-trimethylammonium-2-ethyl methyl acrylate
  • polyester resin systems contain maleic acid or fumaric acid and z.
  • the hydrophilic vinyl monomer mixtures preferably contain from 0 to 80% by weight, in particular 0.5 to 50% by weight, of hydrophobic monomers, such as methyl methacrylate, butyl acrylate, ethyl acrylate, cyclohexyl acrylate or ethyl hexyl acrylate.
  • hydrophobic monomers such as methyl methacrylate, butyl acrylate, ethyl acrylate, cyclohexyl acrylate or ethyl hexyl acrylate.
  • Urethane-modified acrylic and methacrylic esters can also be used, which in a known manner, for. B.
  • 2-isocyanatoethyl methacrylate with various C1 to C6 alcohols, especially methanol, ethanol or butanol, alkoxy alcohols, such as ethoxylated and / or propoxylated methyl, ethyl, propyl, butyl or hexyl or ethylhexyl alcohol, or can be obtained by reacting hydroxyalkyl acrylates or hydroxyalkyl methacrylates with aromatic or aliphatic mono-, di- or triisocyanates such as hexamethylene diisocyanate, lysine methyl ester diisocyanate, toluene diisocyanate, MDI diphenylmethane diisocyanate or an adduct of trimethylol propane and 3 mol toluene diisocyanate.
  • N-vinylpyrrolidone can be used in the hydrophilic vinyl monomer mixture, which is particularly suitable as an additive in the sense of
  • Suitable crosslinking components are, for example, butanediol bisacrylate, 1,6-hexanediol bisacrylate, oligoethylene glycol bisacrylates with 1 to 400 ethylene glycol units, acrylates or methacrylates of trimethylol propane, ethoxylated and / or propoxylated trimethylol propane. Also suitable is bis (2 hydroxyethyl) bisphenol A dimethacrylate or an adduct of (meth) acrylic acid and bisphenol A diglycidyl ether or urethane-modified bisacrylates.
  • the mixtures mentioned to be applied to the molded part can be produced with a solvent which has a favorable effect on the processability of the system.
  • Suitable solvents are acetone, methyl ethyl ketone, methanol, ethanol, propanol, butanol, ethyl acetate, butyl acetate, methylene chloride, toluene, THF, water and mixtures thereof.
  • Photoinitiators can be used in the vinyl monomer mixture in an effective amount of 0.01 to 5% by weight, in particular 0.1 to 5% by weight and preferably in an amount of 0.3 to 1% by weight. Compounds are used that break down into radicals due to UV radiation.
  • Effective photoinitiators are, for example, the known compounds benzophenone, acetophenone, fluorenone, benzaldehyde, propiophenone, anthraquinone, carbazole, 3- or 4-methylacetophenone, 3- or 4-methoxybenzophenone, 4,4'-dimethoxybenzophenone, allylacetophenone, 2,2'-diphenoxyacetone , Benzoin, methyl benzoin ether, ethyl benzoin ether, propyl benzoin ether, benzoin acetate, benzoin phenyl carbamate, benzoin acrylate, benzoin phenyl ether, benzoyl peroxide, dicumyl peroxide, azoisobutyronitrile, phenyl disulfide, acylphosphine oxides or chloromethylanthraquinone and mixtures thereof.
  • an activator in addition to the photoinitator, 0.3 to 5.0% by weight of an activator can also be mixed into the coating system.
  • Suitable activators are, for example, mercaptoacetic acid, organic amines, such as n-decylamine, piperazine, morpholine, tributylamine, benzylamine, allylamine, polyethyleneimine and / or piperidine.
  • the razor or razor blade unit according to the invention is characterized in that the lubricity-increasing device comprises a 5 to 1,000 ⁇ m thick layer of a mixture of water-soluble polymers, in particular poly-N-vinylpyrrolidone or a copolymer thereof, cured by UV radiation, or one or more radicals polymerizable vinyl monomers and a photoinitiator which decomposes into free radicals when irradiated. Further configurations of this lubricity layer result from the compositions listed above.
  • the particular advantage is that the coating of the razor, razor ratekopfes or the razor blade unit can take place over a large area, even over the entire area on the polystyrene or ABS or metal carrier body or PVC film to be subsequently glued on, the layer thickness being very adjustable so that the volume of the solution applied does not change during the curing process, so that the applied layer thickness is retained.
  • the viscosity of the solution it is also possible to form relatively thick layers without the solution running away in an uncontrolled manner after application and thus causing a change in layer thickness.
  • the layer also adheres extremely well to polystyrene or ABS, which is generally used as a molded plastic body on razors, but also to metal surfaces, so that the formation of the sliding layer is simple.
  • a mixture of 2.40 g of tetrahydrofuranyl 2-methyl acrylate, 0.05 g of photoinitiator (Darocur 1116, Merck), 0.25 g of polyvinylpyrrolidone and 0.05 g of tetraethylene glycol diacrylate is applied to a polystyrene support with a brush and then the top layer irradiated with an 80 W UV lamp at a distance of 5 cm for 15 min. When cured, the hardened coating has a drastically reduced frictional resistance. Sliding friction of a leather disc, which is pressed onto the coated surface with 1 kg / 8 cm2: dry 350 CN Wet 180 CN
  • a mixture of 2.45 g of tetrahydrofuranyl-2-methyl acrylate, 0.05 g of photoinitiator (Darocur 1116), 0.25 g of polyvinylpyrrolidone is applied to a polystyrene body with a sponge and then with a Hg UV lamp at a distance of 30 min Irradiated 10 cm.
  • the hardened coating shows a drastically reduced coefficient of friction when wet. Sliding friction of a leather disc that is pressed 1 kg / 8 cm2 pressure on the treated and hardened surface: dry 360 CN wet 200 CN
  • a surface is also obtained whose frictional resistance is drastically reduced by moistening. dry 340 CN wet 100 CN
  • the razor 1 shown in perspective in the single figure of the drawing has a razor blade unit 3 which can be placed on a handle and in which two razor blades 4, 5 are fixedly arranged between a raiser blade carrier 6 and a cap 7 in a conventional manner.
  • a protective and guide bar 8 is arranged on the razor blade carrier and is ribbed in the usual way.
  • the entire cap 7 and possibly the guide surface is provided with a sliding layer 2 shown hatched in the drawing, which has been applied according to one of the above examples 1 to 3 and consists of the preferred mixtures of substances mentioned.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Paints Or Removers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Wrappers (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

A process for forming and applying a hydrophilic coating which has very low friction in the moist state to a razor, in which a solution containing a water-soluble polymer, in particular polyvinylpyrrolidone, is applied and cured. The razor is made of plastic, such as polystyrene or ABS, or of metal provided with a device which reduces the friction. The invention proposes that the solution applied to the moulding comprises a water-soluble polymer, in particular poly-N-vinylpyrrolidone or a copolymer thereof, one or more free radical-polymerisable vinylmonomers and a photoinitiator which decomposes on irradiation to form free radicals, and that the applied solution is exposed to UV irradiation for curing.

Description

Die Erfindung betrifft ein Verfahren zur Ausbildung und Auf­bringung einer hydrophilen, im feuchten Zustand hochgleitfähi­gen Beschichtung auf einem Formteil aus Kunststoff oder Me­tall, insbesondere Rasierapparat bzw. Rasierklingeneinheit, bei dem eine ein wasserlösliches Polymeren, insbesondere Poly­vinylpyrrolidon, enthaltende Lösung auf das Formteil aufgetra­gen und dort ausgehärtet wird. Die Erfindung betrifft ferner einen Rasierapparat bzw. eine Rasierklingeneinheit mit wenig­stens einer auf einer Klingenauflage gehaltenen Rasierklinge und einer der Rasierklinge benachbarten, die Haut des Be­nutzers beim Rasiervorgang überstreichenden Fläche, insbeson­dere Kappe, aus Kunststoff, wie Polystyrol oder ABS oder aus Metall, die mit einer die Gleitfähigkeit steigernden Einrich­tung versehen ist.The invention relates to a process for the formation and application of a hydrophilic coating which is highly lubricious in the moist state on a molded part made of plastic or metal, in particular a razor or razor blade unit, in which a solution containing a water-soluble polymer, in particular polyvinylpyrrolidone, is applied to the molded part and cured there becomes. The invention further relates to a razor or a razor blade unit with at least one razor blade held on a blade support and a surface adjacent to the razor blade that sweeps over the skin of the user during the shaving process, in particular a cap made of plastic, such as polystyrene or ABS, or of metal that is coated with a the lubricity-increasing device is provided.

Aus der DE-OS 28 51 457 ist ein Rasierapparat aus Kunststoff bekannt, bei dem zwischen einer Rasierklingenauflage und einer Kappe wenigstens eine Rasierklinge angeordnet ist. Der Rasier­apparatekopf weist ein integrales festes und wasserlösliches Rasierhilfsmittel auf. Das Rasierhilfsmittel ist dabei in Form eines Streifens aus dem festen, jedoch wasserlöslichen Ma­terial vorgesehen, wobei der Streifen in einer angrenzenden Lage zu der Rasierklinge angeordnet ist und entweder an der Klingenauflage oder der Kappe befestigt ist. Insbesondere ist als wasserlösliches Material ein mikroeingekapseltes Silikon­öl, Polyäthylenoxid, ein nichtionisches Polyacrylamid oder ein Polysaccharid vorgesehen. Hiermit soll eine perfektionierte Naßrasur dadurch erreicht werden, daß das Rasierhilfsmittel im Kontakt mit der feuchten Haut oder ggf. durch Befeuchten des Rasierapparatekopfs selbst sofort und bei jedem Rasiervorgang aufs neue auf die Haut aufgetragen wird, so daß es mit seinen Gleiteigenschaften kontinuierlich während der Dauer des Ra­siervorgangs wirkt.From DE-OS 28 51 457 a razor made of plastic is known in which at least one razor blade is arranged between a razor blade support and a cap. The shaver head has an integral solid and water soluble shaving aid. The shaving aid is provided in the form of a strip made of the solid but water-soluble material, the strip being arranged in an adjacent position to the razor blade and being attached either to the blade support or to the cap. In particular is a microencapsulated silicone oil, polyethylene oxide, a nonionic polyacrylamide or a polysaccharide is provided as the water-soluble material. This is to achieve a perfect wet shave in that the shaving aid in contact with damp skin or, if necessary, by moistening the shaver head itself and immediately after each shaving process is applied to the skin again, so that it with its sliding properties continuously during the duration of the Shaving works.

Nachteilig ist bei dem bekannten Rasierapparat, daß sich die als Schmiermittel wirkende Substanz aus dem Trägerkörper her­auslöst und sich in Form eines Films auf der Haut des Benutzers ablagert. Damit besteht die Gefahr der Verursachung von Hautirritationen ebenso wie die Notwendigkeit, den Schmierfilm, der auf bereits rasierten Hautflächen antrocknet, nachträglich abzuwaschen, was in Abhängigkeit vom Härtegrad des zur Verfügung stehenden Wassers schwierig sein kann. Darüber hinaus ist die Konstruktion des Rasierapparats mit in einer Ausnehmung angeordnetem Kunststoffstreifen aufwendig und ist es nicht möglich, den Streifen in die wirkliche Nähe der Schneidkante der Rasierklinge zu rücken. Prinzipiell ist daher der bekannte Gleitstreifen nur an einem Ort des Rasierapparats zu positionieren, der für die erwünschten Gebrauchseigenschaf­ten ungünstig ist.A disadvantage of the known razor is that the substance acting as a lubricant detaches from the carrier body and is deposited on the skin of the user in the form of a film. There is thus the risk of causing skin irritation as well as the need to rinse off the lubricating film that dries on already shaved skin, which can be difficult depending on the hardness of the water available. In addition, the construction of the razor with a plastic strip arranged in a recess is complex and it is not possible to move the strip into the actual vicinity of the cutting edge of the razor blade. In principle, therefore, the known sliding strip is only to be positioned at a location on the shaving apparatus which is unfavorable for the desired usage properties.

Aus der DE-PS 28 28 617 ist ferner ein Formkörper aus einem polymeren Substrat und einer auf dieses Substrat aufgetragenen Überzugsschicht bekannt, bei dem diese aus einem Polyvinyl­pyrrolidon-Polyurethan-Interpolymeren besteht. Für einen sol­chen Formkörper werden verschiedene Anwendungszwecke, wie Kon­taktlinsen, Katheder, peristaltische Pumpenkammern, Kondome und dgl. genannt, bei denen es erwünscht ist, ein Material, wie Polyurethan, einen Acrylsäure-Polyester oder ein Vinylharz zu verwenden, das im feuchten Zustand einen geringeren Rei­bungskoeffizienten hat als er bei solchen Materialen sonst möglich ist. Anders als in der Medizintechnik bestehen solche Forderungen bei herkömmlichen Rasierapparaten nicht und ist es auch nicht üblich, derartige Materialien, insbesondere ein Po­lyurethan, zu verwenden. Vielmehr bestehen Rasierapparate und Rasierklingeneinheit aus Polystyrol, das in seinen Eigenschaf­ten nicht vergleichbar ist. Insbesondere würde ein nach dem Verfahren gemäß der DE-PS 28 28 617 aufgebrachter Überzug nicht auf Polystyrol haften. Dort ist nämlich vorgeschlagen, daß man auf das Substrat die Lösung eines Polyisocyanats auf­trägt und nach dem Verdampfen des Lösungsmittels auf das so behandelte Substrat eine Lösung von Polyvinylpyrrolidon auf­trägt, wonach das Lösungsmittel verdampft wird, um ein Polyvi­nylpyrrolidon-Polyurethan-Interpolymeres zu erhalten. Nachtei­lig ist bei diesem Verfahren darüber hinaus, daß die derartige Ausbildung einer Überzugsschicht ein zeitraubender Prozeß ist, da die einzelnen Komponenten aus verdünnten Lösungen aufgetra­gen werden, die Lösungsmittel langsam verdampft werden und freie Isocyanatgruppen bei erhöhter Temperatur zur Reaktion gebracht werden. Würde dies komplizierte Verfahren auf die Herstellung von Rasierapparaten übertragen werden, bestünde die Gefahr, daß Spannungsrisse entstehen oder Deformationspro­zesse eingeleitet würden. Schließlich ist dies Verfahren auf die Herstellung von Rasierapparate deshalb nicht übertragbar, weil die Lösungen nur zu etwa 10 bis 15 % aus im Rahmen des Herstellungsprozesses nicht verdampfenden Substanzen bestehen, so daß nur außerordentlich geringe Schichtstärken für den Gleitüberzug erzielbar sind. Die Schichtstärken sind auch außerordentlich schlecht zu kontrollieren und es ist ein Auf­tragen auf runden Oberflächen zumindest schwierig durchzufüh­ren. Auch die Steuerung des Aushärtungsprozesses durch Ver­dampfen muß sehr langsam und sorgfältig erfolgen, damit der Prozeß von innen nach außen verläuft und vermieden wird, daß unerwünschte Substanzen im Endprodukt eingeschlossen bleiben, die sich während des Rasiervorgangs herauslösen und auf der Haut zurückbleiben würden.From DE-PS 28 28 617 a molded body made of a polymeric substrate and a coating layer applied to this substrate is also known, in which it consists of a polyvinylpyrrolidone-polyurethane interpolymer. Various applications, such as contact lenses, catheters, peristaltic pump chambers, condoms and the like, are mentioned for such a shaped body, in which it is desirable to use a material, such as polyurethane, an acrylic acid polyester or a vinyl resin, which has a lower content in the moist state Has a coefficient of friction that is otherwise the case with such materials is possible. Unlike in medical technology, such requirements do not exist with conventional shavers and it is also not common to use such materials, in particular a polyurethane. Rather, the razors and razor blade unit are made of polystyrene, the properties of which are not comparable. In particular, a coating applied by the process according to DE-PS 28 28 617 would not adhere to polystyrene. It is proposed there that a solution of a polyisocyanate is applied to the substrate and, after the solvent has evaporated, a solution of polyvinylpyrrolidone is applied to the substrate treated in this way, after which the solvent is evaporated to give a polyvinylpyrrolidone-polyurethane interpolymer. Another disadvantage of this process is that the formation of a coating layer in this way is a time-consuming process, since the individual components are applied from dilute solutions, the solvents are slowly evaporated and free isocyanate groups are reacted at elevated temperature. If this complicated process were to be applied to the manufacture of razors, there would be a risk of stress cracks or deformation processes. Finally, this method is not transferable to the manufacture of shavers because the solutions consist only of about 10 to 15% of substances that do not evaporate during the manufacturing process, so that only extremely thin layers can be achieved for the sliding coating. The layer thicknesses are also extremely difficult to control and it is at least difficult to apply to round surfaces. The control of the curing process by evaporation must also be carried out very slowly and carefully so that the process runs from the inside out and to avoid undesired substances being trapped in the end product. that would come off during the shaving process and would remain on the skin.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art unter Meidung obiger Nachteile derart zu verbessern, daß die Herstellung von Formteilen aus Kunst­stoff oder Metall, insbesondere Rasierapparaten bzw. Rasier­klingeneinheiten oder deren Teilen, hoher Gleitfähigkeit im feuchten Zustand ermöglicht wird, wobei die Beschichtung auch auf Polystyrol oder ABS oder Metall gut haften und in kurzer Zeit aufzubringen und auszuhärten sein soll. Insbesondere liegt der Erfindung die Zielsetzung zugrunde, die Gleitei­genschaften eines Rasierapparats gerade im klingennahen Be­reich auf einem Wege zu verbessern, der ausschließt, daß sich Substanzen nach Art eines Schmiermittels auf der Haut des Be­nutzers ablagern.The invention has for its object to improve a method of the type mentioned while avoiding the above disadvantages in such a way that the production of molded parts made of plastic or metal, in particular razors or razor blade units or their parts, high lubricity is possible in the moist state, the The coating also adheres well to polystyrene or ABS or metal and should be applied and hardened in a short time. In particular, the invention is based on the objective of improving the sliding properties of a razor, particularly in the area close to the blade, in a way which prevents substances in the manner of a lubricant from depositing on the skin of the user.

Die Aufgabe ist erfindungsgemäß dadurch gelöst, daß die auf das Formteil aufzutragende Lösung aus dem wasserlöslichen Po­lymer, insbesondere Poly-N-Vinylpyrrolidon oder einem Copoly­meren hiervon, einem oder mehreren radikalisch polymerisierba­ren Vinylmonomeren und einem bei einer Bestrahlung in Radikale zerfallenden Photoinitiator besteht und daß die aufgetragene Lösung zur Aushärtung einer UV-Bestrahlung ausgesetzt wird. Die Lösung härtet dann rasch zu einem gut haftenden Überzug kontrollierter Schichtstärke aus, der im feuchten Zustand einen stark verminderten Reibungskoeffizienten bei Hautkontakt aufweist. Vorzugsweise enthält die Lösung 0,1 bis 90 Gew. % Polyvinylpyrrolidon, insbesondere 5 bis 30 Gew. % Polyvinyl­pyrrolidon, bezogen auf das eingesetzte Vinylmonomeren. Das mittlere Molekulargewicht von Polyvinylpyrrolidon kann unter­schiedliche Werte von 15.000 bis 800.000 g/mol, vorzugsweise 200.000 bis 500.000 g/mol, betragen.The object is achieved according to the invention in that the solution to be applied to the molded part consists of the water-soluble polymer, in particular poly-N-vinylpyrrolidone or a copolymer thereof, one or more radically polymerizable vinyl monomers and a photoinitiator which decomposes into free radicals when irradiated and that the applied one Solution for curing is exposed to UV radiation. The solution then hardens quickly to a well-adhering coating of controlled layer thickness, which has a greatly reduced coefficient of friction on contact with the skin when wet. The solution preferably contains 0.1 to 90% by weight of polyvinylpyrrolidone, in particular 5 to 30% by weight of polyvinylpyrrolidone, based on the vinyl monomers used. The average molecular weight of polyvinylpyrrolidone can be different values from 15,000 to 800,000 g / mol, preferably 200,000 to 500,000 g / mol.

Anstelle der Verwendung reinen Polyvinylpyrrolidons, das be­sonders geeignet ist, können auch Copolymere des Pyrrolidons mit beispielsweise Maleinaten oder Acrylaten im erfindungs­gemäßen Sinne verwendet werden. Ferner sind andere wasserlös­liche Polymere, wie Polyvinylalkohol, Polyacrylamid enthalten­de Polymere, Polysaccharide oder Polyäthylenxid als Additiv geeignet.Instead of using pure polyvinylpyrrolidone, which is particularly suitable, copolymers of pyrrolidone with, for example, maleinates or acrylates in the sense of the invention can also be used. Other water-soluble polymers, such as polyvinyl alcohol, polymers containing polyacrylamide, polysaccharides or polyethylene oxide, are also suitable as additives.

Im Sinne der Erfindung geeignete radikalisch polymerisierbare Vinylmonomeren sind vorzugsweise Acrylsäure, Methacrylsäure und deren Derivate sowie Mischungen aus Styrol und Maleinsäure bzw. Fumarsäure enthaltenden Polyesterharzen. Beispiele sind cyclische oder offenkettige Ethergruppen enthaltende Acrylsäureester oder Methacrylsäureester, wie Ester von ein­fach oder mehrfach ethoxylierten oder propoxylierten C₁ - C₂₀ Alkoholen, THF-Carbinolacrylat oder THF-Carbinolmethacrylat, Hydroxyalkylester, wie 2-Hydroxyethylacrylat, 2-Hydroxyethyl­methacrylat, 2-Hydroxypropylacrylat oder 2-Hydroxypropyl­methacrylat, N,N-Dimethylamino-2-hydroxyethylacrylat, N,N-Di­methylaminoethylmetharylat oder Salze hiervon, wie N,N,N-Tri­methylammonium-2-ethylmethylacrylat-chlorid, ferner Acrylamid, N-Alkylacrylamid mit 1 - 10 C-Atomen in der Alkylgruppe, N-2-hydroxyethylacrylamid, N-2-Hydroxypropylacrylamid oder Methacrylamid, N-2-Hydroxyethylmethacrylamid, N-2-Hydroxypro­pylmethacrylamid, Acrylnitril und Methacrylnitril.Radically polymerizable vinyl monomers suitable for the purposes of the invention are preferably acrylic acid, methacrylic acid and their derivatives and mixtures of styrene and maleic acid or fumaric acid-containing polyester resins. Examples are cyclic or open-chain ether groups containing acrylic acid esters or methacrylic acid esters, such as esters of mono- or poly-ethoxylated or propoxylated C₁ - C₂₀ alcohols, THF-carbinol acrylate or THF-carbinol methacrylate, hydroxyalkyl esters, such as 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate Hydroxypropyl methacrylate, N, N-dimethylamino-2-hydroxyethyl acrylate, N, N-dimethylaminoethyl metharylate or salts thereof, such as N, N, N-trimethylammonium-2-ethyl methyl acrylate chloride, furthermore acrylamide, N-alkylacrylamide with 1-10 C atoms in the alkyl group, N-2-hydroxyethylacrylamide, N-2-hydroxypropylacrylamide or methacrylamide, N-2-hydroxyethyl methacrylamide, N-2-hydroxypropyl methacrylamide, acrylonitrile and methacrylonitrile.

Die außerdem geeigneten Polyesterharzsysteme enthalten Malein­säure bzw. Fumarsäure sowie z. B. Phtalsäure, Adipinsäure, Se­bazinsäure und hydrophile Polyetherdiole, wie Diethylenglycol, Oligoethylenglycol mit 3 - 1.000 Ethylenoxidbausteinen, Oligo­propylenglycol mit 1 - 1.000 Propylenoxidbausteinen, ferner Etylenglycol, Butandiol, Trimethylolpropan oder ethoxyliertes Trimethylolpropan mit 3 - 60 Ethylenoxidanteilen sowie ethoxy­liertes und/oder propoxyliertes Trimethylolpropan mit 0 - 60 Propylenoxidanteilen.The also suitable polyester resin systems contain maleic acid or fumaric acid and z. B. phthalic acid, adipic acid, sebacic acid and hydrophilic polyetherdiols, such as diethylene glycol, oligoethylene glycol with 3 - 1,000 ethylene oxide units, oligopropylene glycol with 1 - 1,000 propylene oxide units, furthermore ethylene glycol, butanediol, trimethylolpropane or ethoxylated trimethylolpropane with 3 - 60 ethylene oxide / propanols and propoxylated or ethoxylated and ethoxylated 0 - 60 parts of propylene oxide.

Vorzugsweise sind in den hydrophilen Vinylmonomermischungen Anteile von 0 bis 80 Gew. %, insbesondere 0,5 bis 50 Gew. % an hydrophoben Monomeren, wie Metylmethacrylat, Butylacrylat, Ethylacrylat, Cyclohexylacrylat oder Ethyl-hexylacrylat, vorhanden. Auch können Urethan-modifizierte Acryl- und Methacrylester eingesetzt werden, die in bekannter Weise z. B. durch die Umsetzung von 2-Isocyanatoethylmethacrylat mit ver­schiedenen C₁ bis C₆ Alkoholen, insbesondere Methanol, Ethanol oder Butanol, Alkoxyalkoholen, wie ethoxylierter und/oder propoxylierter Methyl-, Ethyl-, Propyl-, Butyl- oder Hexyl- bzw. Ethylhexylalkohol, oder durch Umsetzung von Hydroxyalkylacrylaten oder Hydroxyalkylmethacrylaten mit aro­matischen oder aliphatischen Mono-, Di- oder Triisocyanaten, wie Hexamethylendiisocyanat, Lysin-methylesterdiisocyanat, To­luoldiisocyanat, MDI Diphenylmethandiisocyanat oder ein Addukt aus Trimethylolpropan und 3 mol Toluoldiisocyanat, erhalten werden. Ferner kann N-Vinylpyrrolidon in der hydrophilen Vinylmonomermischung verwenden werden, welches als Zusatz besonders geeignet ist im Sinne der Erfindung.The hydrophilic vinyl monomer mixtures preferably contain from 0 to 80% by weight, in particular 0.5 to 50% by weight, of hydrophobic monomers, such as methyl methacrylate, butyl acrylate, ethyl acrylate, cyclohexyl acrylate or ethyl hexyl acrylate. Urethane-modified acrylic and methacrylic esters can also be used, which in a known manner, for. B. by the reaction of 2-isocyanatoethyl methacrylate with various C₁ to C₆ alcohols, especially methanol, ethanol or butanol, alkoxy alcohols, such as ethoxylated and / or propoxylated methyl, ethyl, propyl, butyl or hexyl or ethylhexyl alcohol, or can be obtained by reacting hydroxyalkyl acrylates or hydroxyalkyl methacrylates with aromatic or aliphatic mono-, di- or triisocyanates such as hexamethylene diisocyanate, lysine methyl ester diisocyanate, toluene diisocyanate, MDI diphenylmethane diisocyanate or an adduct of trimethylol propane and 3 mol toluene diisocyanate. Furthermore, N-vinylpyrrolidone can be used in the hydrophilic vinyl monomer mixture, which is particularly suitable as an additive in the sense of the invention.

Obwohl mehrfunktionelle Vinylverbindungen im Sinne der Erfin­dung nicht zwingend erforderlich sind, führt die Zugabe in einer Menge von 0 bis 80 Gew. %, vorzugsweise bis zu 50 Gew. % ebenfalls zu qualitativ guten Ergebnissen. Geeignete Ver­netzerkomponenten sind beispielsweise Butandiolbisacrylat, 1,6-Hexandiolbisacrylat, Oligoethylenglycol-Bisacrylate mit 1 bis 400 Ethylenglycoleinheiten, Acrylate oder Methacrylate des Trimethylolpropans, ethoxylierten und/oder propoxylierten Tri­methylolpropans. Ebenfalls geeignet ist Bis(2 hydroxyethyl) bisphenol-A-dimethacrylat oder ein Addukt aus (Meth)acrylsäure und Bisphenol-A-diglycidether oder Urethan-modifiziert Bis­acrylate.Although polyfunctional vinyl compounds are not absolutely necessary in the sense of the invention, the addition in an amount of 0 to 80% by weight, preferably up to 50% by weight, likewise leads to qualitatively good results. Suitable crosslinking components are, for example, butanediol bisacrylate, 1,6-hexanediol bisacrylate, oligoethylene glycol bisacrylates with 1 to 400 ethylene glycol units, acrylates or methacrylates of trimethylol propane, ethoxylated and / or propoxylated trimethylol propane. Also suitable is bis (2 hydroxyethyl) bisphenol A dimethacrylate or an adduct of (meth) acrylic acid and bisphenol A diglycidyl ether or urethane-modified bisacrylates.

Die genannten auf das Formteil aufzutragenden Mischungen kön­nen mit einem Lösungsmittel hergestellt sein, das die Verar­beitbarkeit des Systems günstig beeinflußt. Geeignete Lösungs­mittel sind Aceton, Methylethylketon, Methanol, Ethanol, Pro­panol, Butanol, Ethylacetat, Butylacetat, Methylenchlorid, To­luol, THF, Wasser sowie Mischungen hiervon.The mixtures mentioned to be applied to the molded part can be produced with a solvent which has a favorable effect on the processability of the system. Suitable solvents are acetone, methyl ethyl ketone, methanol, ethanol, propanol, butanol, ethyl acetate, butyl acetate, methylene chloride, toluene, THF, water and mixtures thereof.

Photoinitiatoren können in einer effektiven Menge von 0,01 bis 5 Gew. %, insbesondere 0,1 bis 5 Gew. % und vorzugsweise in einer Menge von 0,3 bis 1 Gew. % in der Vinylmonomermischung verwendet werden. Dabei werden Verbindungen herangezogen, die durch UV-Bestrahlung in Radikale zerfallen. So sind wirksame Photoinitiatoren beispielsweise die bekannten Verbindungen Benzophenon, Acetophenon, Fluorenon, Benzaldehyd, Propiophe­non, Anthrachinon, Carbazol, 3- oder 4-Methylacetophenon, 3- oder 4-Methoxybenzophenon, 4,4′Dimethoxybenzophenon, Allylace­tophenon, 2,2′-Diphenoxyacetophenon, Benzoin, Methylbenzoin­ether, Ethylbenzoinether, Propylbenzoinether, Benzoinacetat, Benzoinphenyl-carbamat, Benzoinacrylat, Benzoinphenylether, Benzoylperoxid, Dicumylperoxid, Azoisobutyronitril, Phenyldi­sulfid, Acylphosphanoxide oder Chlormethylanthrachinon sowie Mischungen hiervon.Photoinitiators can be used in the vinyl monomer mixture in an effective amount of 0.01 to 5% by weight, in particular 0.1 to 5% by weight and preferably in an amount of 0.3 to 1% by weight. Compounds are used that break down into radicals due to UV radiation. Effective photoinitiators are, for example, the known compounds benzophenone, acetophenone, fluorenone, benzaldehyde, propiophenone, anthraquinone, carbazole, 3- or 4-methylacetophenone, 3- or 4-methoxybenzophenone, 4,4'-dimethoxybenzophenone, allylacetophenone, 2,2'-diphenoxyacetone , Benzoin, methyl benzoin ether, ethyl benzoin ether, propyl benzoin ether, benzoin acetate, benzoin phenyl carbamate, benzoin acrylate, benzoin phenyl ether, benzoyl peroxide, dicumyl peroxide, azoisobutyronitrile, phenyl disulfide, acylphosphine oxides or chloromethylanthraquinone and mixtures thereof.

Zusätzlich zum Photoinitator können noch 0,3 bis 5,0 Gew. % eines Aktivators dem Beschichtungssystem zugemischt werden. Geeignete Aktivatoren sind beispielsweise Mercaptoessigsäure, organische Amine, wie n-Decylamin, Piperazin, Morpholin, Tri­butylamin, Benzylamin, Allylamin, Polyethylenimin und/oder Pi­peridin.In addition to the photoinitator, 0.3 to 5.0% by weight of an activator can also be mixed into the coating system. Suitable activators are, for example, mercaptoacetic acid, organic amines, such as n-decylamine, piperazine, morpholine, tributylamine, benzylamine, allylamine, polyethyleneimine and / or piperidine.

Der erfindungsgemäße Rasierapparat bzw. Rasierklingeneinheit ist dadurch gekennzeichnet, daß die die Gleitfähigkeit steigernde Einrichtung eine 5 bis 1.000 µm starke Schicht aus einer durch UV-Bestrahlung ausgehärteten Mischung aus wasser­löslichen Polymeren, insbesondere Poly-N-Vinylpyrrolidon oder einem Copolymeren hiervon, einem oder mehreren radikalisch polymerisierbaren Vinylmonomeren und einem bei Bestrahlung in Radikale zerfallenden Photoinitiator besteht. Weitere Ausge­staltungen dieser Gleitfähigkeitsschicht ergeben sich aus den oben aufgeführten Stoffzusammenstellungen. Der besondere Vor­teil ist, daß die Beschichtung des Rasierapparats, Rasierappa­ ratekopfes oder der Rasierklingeneinheit großflächig, ja sogar ganzflächig auf dem Polystyrol- oder ABS- oder Metallträger­körper bzw. nachträglich aufzuklebender PVC-Folie stattfinden kann, wobei die Schichtstärke dadurch sehr gut einstellbar, daß sich das Volumen der aufgetragenen Lösung während des Aus­härtevorgangs nicht ändert, so daß die aufgetragene Schicht­stärke erhalten bleibt. Über eine Viskositätseinstellung der Lösung lassen sich auch relativ dicke Schichten ausbilden, ohne daß es zu einem unkontrollierten Weglaufen der Lösung nach dem Auftragen und damit zu einer Schichtdickenveränderung kommt. Die Schicht haftet darüber hinaus außerordentlich gut auf dem an Rasierapparaten in der Regel als Kunststoff-Form­körper benutzten Polystyrol oder ABS, aber auch auf Metall­oberflächen, so daß sich die Ausbildung der Gleitschicht als einfach darstellt.The razor or razor blade unit according to the invention is characterized in that the lubricity-increasing device comprises a 5 to 1,000 µm thick layer of a mixture of water-soluble polymers, in particular poly-N-vinylpyrrolidone or a copolymer thereof, cured by UV radiation, or one or more radicals polymerizable vinyl monomers and a photoinitiator which decomposes into free radicals when irradiated. Further configurations of this lubricity layer result from the compositions listed above. The particular advantage is that the coating of the razor, razor ratekopfes or the razor blade unit can take place over a large area, even over the entire area on the polystyrene or ABS or metal carrier body or PVC film to be subsequently glued on, the layer thickness being very adjustable so that the volume of the solution applied does not change during the curing process, so that the applied layer thickness is retained. By adjusting the viscosity of the solution, it is also possible to form relatively thick layers without the solution running away in an uncontrolled manner after application and thus causing a change in layer thickness. The layer also adheres extremely well to polystyrene or ABS, which is generally used as a molded plastic body on razors, but also to metal surfaces, so that the formation of the sliding layer is simple.

Weitere Einzelheiten, Merkmale und Vorteile des Gegenstandes der Erfindung ergeben sich aus der nachfolgenden Beschreibung der zugehörigen Beispiele sowie der Zeichnung, in der ein Ra­sierapparat gemäß der Erfindung schematisch dargestellt ist.Further details, features and advantages of the subject matter of the invention result from the following description of the associated examples and the drawing, in which a shaving apparatus according to the invention is shown schematically.

Beispiel 1example 1

Ein Mischung aus 2,40 g Tetrahydrofuranyl-2-methylacrylat, 0,05 g Photoinitiator (Darocur 1116, Merck), 0,25 g Polyvinylpyrrolidon und 0,05 g Tetraethylenglycol-diacrylat wird auf einen Polystyrolträger mit einem Pinsel aufgetragen und anschließend die Deckschicht mit einer 80 W UV-Lampe in einem Abstand von 5 cm 15 min bestrahlt. Der gehärtete Überzug weist im angefeuchteten Zustand einen drastisch verminderten Reibungswiderstand auf. Gleitreibung einer Lederscheibe, die mit 1 kg/8 cm² auf die beschichtete Oberfläche gepreßt wird:
    trocken 350 CN
    Naß 180 CNA mixture of 2.40 g of tetrahydrofuranyl 2-methyl acrylate, 0.05 g of photoinitiator (Darocur 1116, Merck), 0.25 g of polyvinylpyrrolidone and 0.05 g of tetraethylene glycol diacrylate is applied to a polystyrene support with a brush and then the top layer irradiated with an 80 W UV lamp at a distance of 5 cm for 15 min. When cured, the hardened coating has a drastically reduced frictional resistance. Sliding friction of a leather disc, which is pressed onto the coated surface with 1 kg / 8 cm²:
dry 350 CN
Wet 180 CN

Beispiel 2Example 2

Eine Mischung aus 2,45 g Tetrahydrofuranyl-2-methylacrylat, 0,05 g Photoinitiator (Darocur 1116), 0,25 g Polyvinylpyrroli­don wird mit einem Schwamm auf einen Polystyrolkörper aufge­tragen und anschließend mit einer Hg UV-Lampe 30 min in einem Abstand von 10 cm bestrahlt. Der gehärtete Überzug zeigt im feuchten Zustand einen drastisch verminderten Reibungswert. Gleitreibung einer Lederscheibe, die 1 kg/8 cm² Druck auf die behandelte und gehärtete Oberfläche gepreßt wird:
    trocken 360 CN
    naß 200 CNA mixture of 2.45 g of tetrahydrofuranyl-2-methyl acrylate, 0.05 g of photoinitiator (Darocur 1116), 0.25 g of polyvinylpyrrolidone is applied to a polystyrene body with a sponge and then with a Hg UV lamp at a distance of 30 min Irradiated 10 cm. The hardened coating shows a drastically reduced coefficient of friction when wet. Sliding friction of a leather disc that is pressed 1 kg / 8 cm² pressure on the treated and hardened surface:
dry 360 CN
wet 200 CN

Beispiel 3Example 3

2,30 g Tetrahydrofuranyl-2-methylacrylat, 0,20 g Photoinitia­tor und 0,25 g Polyvinylpyrrolidon werden gemischt, mit einer Rolle auf einem Polystyrolträger aufgetragen und anschließend mit einer 80 W UV-Lampe in einem Abstand von 5 cm 15 min ge­härtet. Der Reibungswiderstand der beschichteten Oberfläche reduziert sich durch Anfeuchten in starkem Maße. Gleitreibung einer Lederscheibe, die mit 1 kg/8 cm² Druck auf die gehärtete Oberfläche gepreßt wird:
    trocken 350 CN
    naß 210 CN2.30 g of tetrahydrofuranyl 2-methyl acrylate, 0.20 g of photoinitiator and 0.25 g of polyvinylpyrrolidone are mixed, applied with a roller to a polystyrene support and then cured with an 80 W UV lamp at a distance of 5 cm for 15 min. The frictional resistance of the coated surface is greatly reduced by moistening. Sliding friction of a leather disc which is pressed onto the hardened surface with 1 kg / 8 cm² pressure:
dry 350 CN
wet 210 CN

Beispiel 4Example 4

10 g N-Vinylpyrrolidon, 10 g Trimethylolpropanmonoacrylat (Roskydal KL 5-2475, Fa. Bayer) werden mit 4 g PVP und 0,75 g Photoinitiator (Darucur 1116, Merck) gemischt, mit einem Rakel auf einen Träger aus ABS oder eine Folie aus PVC aufgebracht und in einem Abstand von 5 cm mit einer 80 W UV-Lampe 3 min bestrahlt.10 g of N-vinylpyrrolidone, 10 g of trimethylolpropane monoacrylate (Roskydal KL 5-2475, Bayer) are mixed with 4 g of PVP and 0.75 g of photoinitiator (Darucur 1116, Merck), using a doctor blade on an ABS or foil support made of PVC and irradiated at a distance of 5 cm with an 80 W UV lamp for 3 min.

Man erhält eine im feuchten Zustand hochgleitfähige Ober­fläche.
    Reibwert trocken 330 CN
    Reibwert naß 80 CNA surface which is highly slidable when wet is obtained.
Coefficient of friction dry 330 CN
Coefficient of friction wet 80 CN

Beispiel 5Example 5

5 g NVP, 5 g Trimethylolpropanmonoacrylat werden mit 2 g PVP und 0,18 g Photoinitiator (Lucirin LR 8728, BASF) gemischt, mit einem Rakel auf einen Träger aus ABS oder eine Folie aus PVC aufgebracht und in einem Abstand von 5 cm mit einer 80 W UV-Lampe 45 sec bestrahlt.5 g of NVP, 5 g of trimethylolpropane monoacrylate are mixed with 2 g of PVP and 0.18 g of photoinitiator (Lucirin LR 8728, BASF), applied to a carrier made of ABS or a film made of PVC using a doctor blade and at a distance of 5 cm using a 80 W UV lamp irradiated for 45 sec.

Man erhält gleichfalls eine Oberfläche, deren Reibungswider­stand sich durch Anfeuchten drastisch verringert.
    trocken 340 CN
    naß 100 CNA surface is also obtained whose frictional resistance is drastically reduced by moistening.
dry 340 CN
wet 100 CN

Der in der einzigen Figur der Zeichnung perspektivisch darge­stellte Rasierapparat 1 weist eine auf einen Handgriff auf­setzbare Rasierklingeneinheit 3 auf, bei der zwei Rasier­klingen 4,5 zwischen einem Raiserklingenträger 6 und einer Kappe 7 in herkömmlicher Weise fest angeordnet sind. Am Ra­sierklingenträger ist eine Schutz- und Führungsleiste 8 ange­ordnet, welche in der üblichen Weise verrippt ist. Die gesamte Kappe 7 sowie ggf. Führungsfläche ist mit einer in der Zeich­nung schraffiert dargestellten Gleitschicht 2 versehen, die gemäß einem der obengenannten Beispiele 1 bis 3 aufgebracht worden ist und aus den genannten bevorzugten Stoffmischungen besteht.The razor 1 shown in perspective in the single figure of the drawing has a razor blade unit 3 which can be placed on a handle and in which two razor blades 4, 5 are fixedly arranged between a raiser blade carrier 6 and a cap 7 in a conventional manner. A protective and guide bar 8 is arranged on the razor blade carrier and is ribbed in the usual way. The entire cap 7 and possibly the guide surface is provided with a sliding layer 2 shown hatched in the drawing, which has been applied according to one of the above examples 1 to 3 and consists of the preferred mixtures of substances mentioned.

BezugszeichenlisteReference symbol list

  • 1 Rasierapparat1 shaver
  • 2 Gleitschicht2 sliding layer
  • 3 Rasierklingeneinheit3 razor blade unit
  • 4 Rasierklinge4 razor blades
  • 5 Rasierklinge5 razor blades
  • 6 Rasierklingenträger6 razor blade holders
  • 7 Kappe7 cap
  • 8 Schutz- und Führungsleiste8 Protection and guide bar

Claims (11)

1. Verfahren zur Ausbildung und Aufbringung einer hydrophilen, im feuchten Zustand hochgleitfähigen Beschichtung auf einem Formteil aus Kunststoff oder Metall unmittelbar oder mit­telbar über eine Kunststoff-Folie, insbesondere Rasierappa­rat bzw. Rasierklingeneinheit, bei dem eine ein wasserlös­liches Polymeren, insbesondere Polyvinylpyrrolidon, enthal­tende Lösung auf das Formteil aufgetragen und dort ausge­härtet wird,
dadurch gekennzeichnet,
daß die auf das Formteil aufgetragene Lösung aus dem was­serlöslichen Polymeren, insbesondere Poly-N-Vinylpyrrolidon oder einem Copolymeren hiervon, einem oder mehreren radika­lisch polymerisierbaren Vinylmonomeren und einem bei Bestrahlung in Radikale zerfallenden Photoinitiator besteht, und daß die aufgetragene Lösung zur Aushärtung einer UV-Bestrahlung ausgesetzt wird.1. A process for the formation and application of a hydrophilic coating which is highly lubricious in the moist state on a molded part made of plastic or metal directly or indirectly via a plastic film, in particular a razor or razor blade unit, in which a solution containing a water-soluble polymer, in particular polyvinylpyrrolidone the molding is applied and cured there,
characterized by
that the solution applied to the molded part consists of the water-soluble polymer, in particular poly-N-vinylpyrrolidone or a copolymer thereof, one or more radically polymerizable vinyl monomers and a photoinitiator which decomposes when irradiated into free radicals, and that the applied solution for curing UV radiation is exposed. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Lösung 0,1 bis 90 Gew. % Polyvinylpyrrolidon, vorzugsweise 5 bis 30 Gew. % Polyvinylpyrrolidon enthält.2. The method according to claim 1, characterized in that the solution contains 0.1 to 90% by weight of polyvinylpyrrolidone, preferably 5 to 30% by weight of polyvinylpyrrolidone. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß das mittlere Molekulargewicht des Polyvinylpyrrolidons 200.000 bis 500.000 g/mol beträgt.3. The method according to claim 2, characterized in that the average molecular weight of the polyvinylpyrrolidone is 200,000 to 500,000 g / mol. 4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekenn­zeichnet, daß als Vinylmonomeren Acrylsäure, Methacrylsäure und deren Derivate und Mischungen aus Acrylsäurederivaten mit N-Vinylpyrrolidon sowie Mischungen aus Styrol und Ma­leinsäure bzw. Fumarsäure enthaltenden Polyesterharzen ver­wendet werden.4. The method according to any one of claims 1 to 3, characterized in that the vinyl monomers used are acrylic acid, methacrylic acid and their derivatives and mixtures of acrylic acid derivatives with N-vinylpyrrolidone and mixtures of styrene and maleic acid or fumaric acid-containing polyester resins. 5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekenn­zeichnet, daß die Vinylmonomerenmischungen mit Anteilen von 0 bis 80 Gew. %, vorzugsweise 0,5 bis 50 Gew. % an hydro­phobem Monomeren, wie Methylmethacrylat, Butylacrylat, Ethylacrylat, Cyclohexylacrylat oder Ethyl-hexylacrylat, sind.5. The method according to any one of claims 1 to 4, characterized in that the vinyl monomer mixtures with proportions of 0 to 80 wt.%, Preferably 0.5 to 50 wt.% Of hydrophobic monomers, such as methyl methacrylate, butyl acrylate, ethyl acrylate, cyclohexyl acrylate or ethyl -hexyl acrylate. 6. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekenn­zeichnet, daß die Vinylmonomeren Urethan-modifizierte Acryl- oder Methacrylester sind.6. The method according to any one of claims 1 to 4, characterized in that the vinyl monomers are urethane-modified acrylic or methacrylic esters. 7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekenn­zeichnet, daß mehrfunktionelle Vinylverbindungen in einer Menge bis zu 50 Gew. % zugegeben werden.7. The method according to any one of claims 1 to 6, characterized in that polyfunctional vinyl compounds are added in an amount up to 50 wt.%. 8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekenn­zeichnet, daß als Lösungsmittel für die aufzutragende Lö­sung Aceton, Methylethylketon, Methanol, Ethanol, Propanol, Butanol, Ethylacetat, Butylacetat, Methylenchlorid, Toluol, THF oder Wasser sowie Mischungen hiervon verwendet werden.8. The method according to any one of claims 1 to 7, characterized in that acetone, methyl ethyl ketone, methanol, ethanol, propanol, butanol, ethyl acetate, butyl acetate, methylene chloride, toluene, THF or water and mixtures thereof are used as solvents for the solution to be applied. 9. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekenn­zeichnet, daß der Photoinitiator in einer Menge von 0,01 bis 5 Gew. %, vorzugsweise 0,3 bis 5 Gew. %, in der Lösung verwendet wird.9. The method according to any one of claims 1 to 8, characterized in that the photoinitiator is used in an amount of 0.01 to 5 wt.%, Preferably 0.3 to 5 wt.%, In the solution. 10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß der Lösung zusätzlich 0,3 bis 5 Gew. % eines Photoaktivators, insbesondere Mercaptoessigsäure und/oder organische Amine, zugesetzt werden.10. The method according to claim 9, characterized in that the solution additionally 0.3 to 5 wt.% Of a photoactivator, in particular mercaptoacetic acid and / or organic amines, are added. 11. Rasierapparat bzw. Rasierklingeneinheit mit wenigstens einer auf eine Klingenauflage gehaltenen Rasierklinge und einer der Rasierklinge benachbarten, die Haut des Benutzers beim Rasiervorgang überstreichenden Fläche, insbesondere Kappe, aus Kunststoff wie Polystyrol oder ABS oder aus Metall, die mit einer die Gleitfähigkeit steigernden Einrichtung versehen ist,
dadurch gekennzeichnet,
daß die Einrichtung eine 5 bis 1.000 µm starke Schicht aus einer durch UV-Bestrahlung ausgehärteten Mischung aus wasser­löslichem Polymeren, insbesondere Poly-N-Vinylpyrrolidon oder einem Copolymeren hiervon, einem oder mehreren radikalisch polymerisierbaren VInylmonomeren und einem bei Bestrahlung in Radikale zerfallenden Photoinitiator besteht.11. razor or razor blade unit with at least one razor blade held on a blade support and a surface adjacent to the razor blade and sweeping over the skin of the user during the shaving process, in particular a cap, made of plastic such as polystyrene or ABS or of metal, which is provided with a device which increases the lubricity
characterized by
that the device consists of a 5 to 1,000 μm thick layer of a mixture of water-soluble polymer, in particular poly-N-vinylpyrrolidone or a copolymer thereof, one or more free-radically polymerizable vinyl monomers and a photoinitiator which breaks down into free radicals upon irradiation and has been cured by UV radiation.
EP88107114A 1987-05-06 1988-05-04 Process for the production of a hydrophilic coating on a moulded part, and razor manufactured by applying the process Expired - Lifetime EP0289996B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88107114T ATE69181T1 (en) 1987-05-06 1988-05-04 PROCESS FOR MAKING A HYDROPHILIC COATING ON A MOLDING AND RAZOR MADE USING THE PROCESS.

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE3714971 1987-05-06
DE3714971 1987-05-06
DE3814135 1988-04-27
DE3814135A DE3814135A1 (en) 1987-05-06 1988-04-27 METHOD FOR PRODUCING A HYDROPHILIC COATING ON A MOLDED PART AND USING THE METHOD OF A SHAVER
IN540DE1988 IN172419B (en) 1987-05-06 1988-06-21

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EP0289996A2 true EP0289996A2 (en) 1988-11-09
EP0289996A3 EP0289996A3 (en) 1990-04-04
EP0289996B1 EP0289996B1 (en) 1991-11-06

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EP (1) EP0289996B1 (en)
JP (1) JP2631997B2 (en)
AT (1) ATE69181T1 (en)
AU (1) AU604883B2 (en)
BR (1) BR8802196A (en)
CA (1) CA1328989C (en)
DD (2) DD284615A5 (en)
DE (2) DE3814135A1 (en)
ES (1) ES2027340T3 (en)
HK (1) HK62795A (en)
IL (1) IL86271A (en)
IN (1) IN172419B (en)

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WO1998058990A1 (en) * 1997-06-20 1998-12-30 Coloplast A/S A hydrophilic coating and a method for the preparation thereof
WO1998058988A1 (en) * 1997-06-20 1998-12-30 Coloplast A/S A hydrophilic coating and a method for the preparation thereof
WO2007065720A2 (en) * 2005-12-09 2007-06-14 Dsm Ip Assets B.V. Hydrophilic coating composition for urinary catheter
EP2305744A1 (en) 2002-12-20 2011-04-06 Coloplast A/S A hydrophilic coating and a method for the preparation
US8241921B2 (en) 2006-06-28 2012-08-14 Surmodics, Inc. Active agent eluting matrices with particulates
US8513320B2 (en) 2007-02-28 2013-08-20 Dsm Ip Assets B.V. Hydrophilic coating
US8809411B2 (en) 2007-02-28 2014-08-19 Dsm Ip Assets B.V. Hydrophilic coating
US8828546B2 (en) 2006-09-13 2014-09-09 Dsm Ip Assets B.V. Coated medical device
US8957125B2 (en) 2010-06-16 2015-02-17 Dsm Ip Assets B.V. Coating formulation for preparing a hydrophilic coating
WO2015161996A1 (en) * 2014-04-24 2015-10-29 Koninklijke Philips N.V. Personal care device with sliding surface
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US7837675B2 (en) * 2004-07-22 2010-11-23 Shaser, Inc. Method and device for skin treatment with replaceable photosensitive window
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US8053081B2 (en) * 2007-04-04 2011-11-08 Aculon, Inc. Cutting tool
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EP2988909B1 (en) * 2013-04-23 2019-01-09 Edgewell Personal Care Brands, LLC Skin engaging member for a razor cartridge
EP3597381A1 (en) 2018-07-18 2020-01-22 BIC-Violex S.A. Shaving aid delivery systems for razors
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Publication number Priority date Publication date Assignee Title
WO1998058989A1 (en) * 1997-06-20 1998-12-30 Coloplast A/S A hydrophilic coating and a method for the preparation thereof
WO1998058990A1 (en) * 1997-06-20 1998-12-30 Coloplast A/S A hydrophilic coating and a method for the preparation thereof
WO1998058988A1 (en) * 1997-06-20 1998-12-30 Coloplast A/S A hydrophilic coating and a method for the preparation thereof
EP2305744A1 (en) 2002-12-20 2011-04-06 Coloplast A/S A hydrophilic coating and a method for the preparation
US8728508B2 (en) 2002-12-20 2014-05-20 Coloplast A/S Hydrophilic coating and a method for the preparation thereof
US9737637B2 (en) 2004-11-29 2017-08-22 Dsm Ip Assets B.V. Method for reducing the amount of migrateables of polymer coatings
WO2007065720A2 (en) * 2005-12-09 2007-06-14 Dsm Ip Assets B.V. Hydrophilic coating composition for urinary catheter
WO2007065720A3 (en) * 2005-12-09 2007-10-18 Dsm Ip Assets Bv Hydrophilic coating composition for urinary catheter
US8133580B2 (en) 2005-12-09 2012-03-13 Dsm Ip Assets B.V. Coating composition for a urinary catheter
US8512795B2 (en) 2005-12-09 2013-08-20 Dsm Ip Assets B.V. Hydrophilic coating comprising a polyelectrolyte
US8871869B2 (en) 2005-12-09 2014-10-28 Dsm Ip Assets B.V. Hydrophilic coating
US8241921B2 (en) 2006-06-28 2012-08-14 Surmodics, Inc. Active agent eluting matrices with particulates
US8828546B2 (en) 2006-09-13 2014-09-09 Dsm Ip Assets B.V. Coated medical device
US8809411B2 (en) 2007-02-28 2014-08-19 Dsm Ip Assets B.V. Hydrophilic coating
US8513320B2 (en) 2007-02-28 2013-08-20 Dsm Ip Assets B.V. Hydrophilic coating
US8957125B2 (en) 2010-06-16 2015-02-17 Dsm Ip Assets B.V. Coating formulation for preparing a hydrophilic coating
WO2015161996A1 (en) * 2014-04-24 2015-10-29 Koninklijke Philips N.V. Personal care device with sliding surface
US10384361B2 (en) 2014-04-24 2019-08-20 Koninklijke Philips N.V. Personal care device with sliding surface

Also Published As

Publication number Publication date
ATE69181T1 (en) 1991-11-15
IL86271A0 (en) 1988-11-15
EP0289996B1 (en) 1991-11-06
AU1564688A (en) 1988-11-10
JPS63294971A (en) 1988-12-01
IL86271A (en) 1991-11-21
DE3814135A1 (en) 1988-11-24
DE3866008D1 (en) 1991-12-12
CA1328989C (en) 1994-05-03
IN172419B (en) 1993-07-17
BR8802196A (en) 1988-12-06
DD299278A5 (en) 1992-04-09
HK62795A (en) 1995-05-05
AU604883B2 (en) 1991-01-03
US5005287A (en) 1991-04-09
DD284615A5 (en) 1990-11-21
JP2631997B2 (en) 1997-07-16
EP0289996A3 (en) 1990-04-04
ES2027340T3 (en) 1992-06-01

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