FR2753987A1 - Composition for a coating for windscreen wipers - Google Patents

Composition for a coating for windscreen wipers Download PDF

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Publication number
FR2753987A1
FR2753987A1 FR9611995A FR9611995A FR2753987A1 FR 2753987 A1 FR2753987 A1 FR 2753987A1 FR 9611995 A FR9611995 A FR 9611995A FR 9611995 A FR9611995 A FR 9611995A FR 2753987 A1 FR2753987 A1 FR 2753987A1
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France
Prior art keywords
composition
coating
blade
composition according
powder
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Granted
Application number
FR9611995A
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French (fr)
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FR2753987B1 (en
Inventor
Michel Oulie
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Valeo Systemes dEssuyage SAS
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Valeo Systemes dEssuyage SAS
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • 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
    • 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
    • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • 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
    • C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
    • 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
    • C08J7/06—Coating with compositions not containing macromolecular substances
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
    • C10M125/02—Carbon; Graphite
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/04—Hydroxy compounds
    • C10M129/06—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/04—Hydroxy compounds
    • C10M129/06—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M129/08—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least 2 hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
    • C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
    • C10M137/04—Phosphate esters
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/10—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate
    • C10M145/12—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate monocarboxylic
    • C10M145/14—Acrylate; Methacrylate
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/40—Polysaccharides, e.g. cellulose
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M173/00—Lubricating compositions containing more than 10% water
    • C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S2001/3827—Wiper blades characterised by the squeegee or blade rubber or wiping element
    • B60S2001/3829—Wiper blades characterised by the squeegee or blade rubber or wiping element characterised by the material of the squeegee or coating thereof
    • 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
    • C08J2321/00—Characterised by the use of unspecified rubbers
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/02—Water
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/04—Elements
    • C10M2201/041—Carbon; Graphite; Carbon black
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/04—Elements
    • C10M2201/041—Carbon; Graphite; Carbon black
    • C10M2201/042—Carbon; Graphite; Carbon black halogenated, i.e. graphite fluoride
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/084—Acrylate; Methacrylate
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/12—Polysaccharides, e.g. cellulose, biopolymers
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/041—Triaryl phosphates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/042—Metal salts thereof
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/01—Emulsions, colloids, or micelles

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

A composition (I) for a coating for rubber and elastomer windscreen wiper blades comprises a powder (II), particularly crystalline carbon in the form of natural or artificial graphite, dispersed in suspension in a vector liquid (III), and a gelling agent (IV). Also claimed is a method (V) of applying a coating to windscreen wiper blades in order to reduce the coefficient of friction between the blade and the windscreen, comprising the application of (I) by coating, immersion of pulverisation followed by drying.

Description

La présente invention concerne une composition, pour réaliser un revêtement sur une lame d'essuyage, en caoutchouc ou en élastomère, d'un essuie-glace de véhicule automobile, destiné à réduire le coefficient de frottement entre la lame d'essuyage et la surface vitrée à essuyer ainsi qu'un procédé pour revêtir une lame d'essuyage d'un tel revêtement. The present invention relates to a composition, for producing a coating on a wiper blade, made of rubber or elastomer, of a motor vehicle windscreen wiper, intended to reduce the coefficient of friction between the wiper blade and the surface glass to be wiped as well as a method for coating a wiping blade with such a coating.

Afin d'améliorer la qualité d'essuyage obtenue au moyen d'une lame d'essuyage, en caoutchouc ou en élastomère naturel ou synthétique, il est connu de la munir d'un revêtement comportant une poudre, notamment de carbone cristallin sous forme de graphite naturel ou artificiel, comportant des particules de très petites dimensions dont la fonction, lors des phases d'essuyage, est alors équivalente à celle d'un "lubrifiant" permettant d'améliorer de manière importante la qualité de l'essuyage. In order to improve the wiping quality obtained by means of a wiping blade, of rubber or of natural or synthetic elastomer, it is known to provide it with a coating comprising a powder, in particular of crystalline carbon in the form of natural or artificial graphite, comprising particles of very small dimensions whose function, during the wiping phases, is then equivalent to that of a "lubricant" making it possible to significantly improve the quality of the wiping.

II est connu de réaliser un tel revêtement à l'aide d'une composition constituée essentiellement par un liant, sous forme d'une résine acrylique, vinylique ou styrènique ou d'uréthane dans lequel est dispersée la poudre de graphite. It is known to produce such a coating using a composition consisting essentially of a binder, in the form of an acrylic, vinyl or styrene resin or urethane in which the graphite powder is dispersed.

Le revêtement est réalisé par trempage de la lame dans la composition ou par enduction de la lame au moyen de la composition, puis par séchage. The coating is carried out by dipping the blade in the composition or by coating the blade with the composition, then by drying.

Un tel revêtement, s'il permet d'améliorer la qualité de l'essuyage, a pour inconvénient d'être particulièrement fragile en ce qu'il est notamment très peu résistant aux détergents et aux lessives qui sont notamment utilisés pour le lavage des véhicules. Such a coating, if it improves the quality of wiping, has the disadvantage of being particularly fragile in that it is in particular very little resistant to detergents and detergents which are used in particular for washing vehicles .

On constate ainsi une très faible durée de vie du revêtement "lubrifiant" qui aboutit rapidement à sa détérioration, voire à sa disparition complète, nuisant alors de manière importante à la qualité de l'essuyage. There is thus a very short lifespan of the "lubricant" coating which rapidly leads to its deterioration, or even to its complete disappearance, then significantly affecting the quality of the wiping.

L'invention a pour but de proposer une nouvelle composition en vue de la réalisation d'un revêtement de lubrification des lames d'essuyage pour essuie-glace de véhicule automobile, qui puisse notamment être mis en oeuvre de manière très aisée par exemple par pulvérisation. The object of the invention is to propose a new composition with a view to producing a coating for lubricating the wiper blades for a windscreen wiper of a motor vehicle, which can in particular be implemented very easily, for example by spraying. .

Dans ce but, I'invention propose une composition pour réaliser un revêtement sur une lame d'essuyage, en caoutchouc ou en élastomère, d'un essuie-glace de véhicule automobile, caractérisée en ce qu'elle comporte une poudre, notamment de carbone cristallin sous forme de graphite naturel ou artificiel, dispersée en suspension dans un liquide vecteur, et un agent gélifiant. To this end, the invention provides a composition for producing a coating on a wiper blade, made of rubber or elastomer, of a windscreen wiper of a motor vehicle, characterized in that it comprises a powder, in particular of carbon crystalline in the form of natural or artificial graphite, dispersed in suspension in a carrier liquid, and a gelling agent.

Grâce à la présence d'un agent gélifiant dans la composition, celle-ci demeure à l'état visqueux, c'est-à-dire que la poudre de graphite reste dispersée de manière uniforme dans la composition. Thanks to the presence of a gelling agent in the composition, it remains in the viscous state, that is to say that the graphite powder remains uniformly dispersed in the composition.

L'existence de la composition à l'état visqueux permet une mise en oeuvre industrielle particulièrement aisée de la composition dans la mesure où la poudre de graphite ne se dépose pas de manière intempestive lors des différentes étapes de mise en oeuvre de la composition. The existence of the composition in the viscous state allows a particularly easy industrial implementation of the composition insofar as the graphite powder is not deposited inadvertently during the various stages of implementation of the composition.

De plus, le fait de disposer d'une composition visqueuse, c'est-à-dire dont la viscosité est augmentée par l'agent gélifiant, facilite sa mise en oeuvre par pulvérisation ou vaporisation, c'est-àdire que les différents paramètres permettant d'obtenir un dépôt uniforme et continu de la couche de poudre de graphite sur la lame d'essuyage sont parfaitement maîtrisés au cours du temps. In addition, the fact of having a viscous composition, that is to say one whose viscosity is increased by the gelling agent, facilitates its use by spraying or spraying, that is to say that the various parameters allowing a uniform and continuous deposition of the graphite powder layer on the wiping blade are perfectly controlled over time.

Selon un mode de réalisation préféré de l'invention, le liquide vecteur est de l'eau. According to a preferred embodiment of the invention, the carrier liquid is water.

L'agent gélifiant est un produit à base d'algues, notamment de l'alginate ou du caragénate. The gelling agent is a product based on algae, in particular alginate or caragenate.

La proportion en poids de l'agent gélifiant dans la composition est égal à environ 0,5%. The proportion by weight of the gelling agent in the composition is equal to approximately 0.5%.

La poudre est une poudre de graphite artificiel ou naturel dont la proportion en poids dans la composition est égale à environ 15%. The powder is an artificial or natural graphite powder whose proportion by weight in the composition is approximately 15%.

La poudre de graphite est mise en suspension dans l'eau par addition d'un agent tensioactif, de préférence non ionique. The graphite powder is suspended in water by the addition of a surfactant, preferably nonionic.

L'agent gélifiant est incorporé à la composition après la mise en suspension de la poudre. The gelling agent is incorporated into the composition after the powder has been suspended.

La composition peut comporter un agent pour empêcher la formation de mousse lors du mélange des composants de la composition. The composition may include an agent to prevent foaming when mixing the components of the composition.

On décrira maintenant une composition préférée d'une composition aqueuse conforme aux enseignements de l'invention. A preferred composition of an aqueous composition in accordance with the teachings of the invention will now be described.

La composition comporte de l'eau adoucie, à pH sensiblement neutre, ou non ionisée.  The composition comprises softened water, at a substantially neutral pH, or non-ionized.

La poudre utilisée est une poudre de graphite artificiel ou naturel micronisée dont la dimension des grains ou particules est, pour 85% des particules, inférieure à 8 microns et ont une surface spécifique de 1 5m2/g. Cette poudre de graphite est incorporée à la composition dans une proportion en poids sensiblement égale à 15%. The powder used is a micronized artificial or natural graphite powder, the size of the grains or particles of which, for 85% of the particles, is less than 8 microns and have a specific surface of 1 5 m 2 / g. This graphite powder is incorporated into the composition in a proportion by weight substantially equal to 15%.

L'agent gélifiant incorporé à la composition conformément aux enseignements de l'invention, est par exemple de l'alginate commercialisé par la société SOBIGEL. The gelling agent incorporated into the composition in accordance with the teachings of the invention is, for example, alginate sold by the company SOBIGEL.

Cet agent gélifiant est incorporé à la composition dans une proportion en poids sensiblement égale à 0,5%. This gelling agent is incorporated into the composition in a proportion by weight substantially equal to 0.5%.

Afin d'éviter la formation de mousse en trop grande quantité lors de la préparation de la composition d'émulsion, il est incorporé dans la composition un agent anti-moussant commercialisé par la société PROTEX qui est un ester phosphorique additionné d'isobutanol et butylglycol. Cet agent anti-moussant est incorporé dans une proportion en poids sensiblement égale à 0,1%. In order to avoid the formation of foam in too large quantity during the preparation of the emulsion composition, there is incorporated into the composition an anti-foaming agent sold by the company PROTEX which is a phosphoric ester added with isobutanol and butyl glycol . This anti-foaming agent is incorporated in a proportion by weight substantially equal to 0.1%.

L'ensemble des composants qui viennent d'être mentionnés, dans les proportions indiquées, est mélangé pour obtenir une composition conforme aux enseignements de l'invention qui est ensuite appliquée sur la lame d'essuyage par tout procédé adapté, tel que par exemple par projection de la composition sur la lame d'essuyage. All of the components which have just been mentioned, in the proportions indicated, are mixed in order to obtain a composition in accordance with the teachings of the invention which is then applied to the wiping blade by any suitable method, such as for example by projection of the composition on the wiping blade.

La composition selon l'invention est aussi caractérisée en ce qu'elle comporte un agent imperméabilisant. The composition according to the invention is also characterized in that it comprises a waterproofing agent.

La présence d'un agent imperméabilisant confère des propriétés hydrophobes au revêtement qui lui permettent de résister de manière très satisfaisante aux agressions extérieures et notamment aux agents détergents et aux lessives. The presence of a waterproofing agent confers hydrophobic properties to the coating which allow it to resist very satisfactorily to external aggressions and in particular detergents and detergents.

Selon un mode de réalisation préféré de l'invention, L'agent imperméabilisant est un copolymère acrylique additionné de cire. According to a preferred embodiment of the invention, the waterproofing agent is an acrylic copolymer added with wax.

L'agent imperméabilisant incorporé à la composition conformément aux enseignements de l'invention, est par exemple du "DRYOL PA" commercialisé par la société PROTEX. The waterproofing agent incorporated into the composition in accordance with the teachings of the invention is, for example, "DRYOL PA" sold by the company PROTEX.

Cet imperméabilisant est un copolymère acrylique additionné de cire qui contient également de l'isopropanol, de l'ammoniaque et du styrène. This waterproofing agent is an acrylic copolymer containing wax, which also contains isopropanol, ammonia and styrene.

Cet agent imperméabilisant est incorporé à la composition dans une proportion en poids sensiblement égale à 0,5%.  This waterproofing agent is incorporated into the composition in a proportion by weight substantially equal to 0.5%.

L'agent imperméabilisant peut ainsi comporter aussi de l'isopropanol.  The waterproofing agent can thus also include isopropanol.

La résine constituant le liant de la composition, qui lui confère sa tenue après réticulation lors de l'opération de séchage, est de préférence une résine acrylique. The resin constituting the binder of the composition, which gives it its strength after crosslinking during the drying operation, is preferably an acrylic resin.

Après cette étape de dépôt de la composition de graphitage, il est procédé à un séchage à basse température, environ égale à 70"C, et une évaporation de l'eau. After this step of depositing the graphitizing composition, drying is carried out at low temperature, approximately equal to 70 ° C., and evaporation of the water.

L'invention n'est bien entendu pas limitée à la composition préférée qui vient d'être décrite en détails. The invention is of course not limited to the preferred composition which has just been described in detail.

Conformément à un autre aspect de l'invention, le procédé pour revêtir la lame d'essuyage d'un essuie-glace d'un revêtement qui réduit le coefficient de frottement entre la lame et la surface vitrée à essuyer, consistant à utiliser une composition conforme aux enseignements de l'invention, peut comporter une étape finale, après séchage, de brossage de la lame munie de son revêtement. According to another aspect of the invention, the method for coating the wiper blade with a wiper of a coating which reduces the coefficient of friction between the blade and the glass surface to be wiped, consisting in using a composition in accordance with the teachings of the invention, may include a final step, after drying, of brushing the blade provided with its coating.

Le brossage est par exemple effectué en faisant passer longitudinalement la lame entre deux brosses tournantes adjacentes. Brushing is for example carried out by passing the blade longitudinally between two adjacent rotating brushes.

Les brosses tournent en sens inverse l'une de l'autre et de préférence dans le sens opposé à la direction d'avancement de la lame entre les brosses. The brushes rotate in opposite directions to each other and preferably in the opposite direction to the direction of advancement of the blade between the brushes.

L'étape complémentaire de brossage permet d'homogénéiser le revêtement déposé sur la surface de la lame d'essuyage et d'éviter que ce revêtement présente des défauts d'aspect ou des irrégularités dans son épaisseur ou des défauts d'adhérence. The complementary brushing step makes it possible to homogenize the coating deposited on the surface of the wiping blade and to prevent this coating from having appearance defects or irregularities in its thickness or adhesion defects.

II est en effet souhaitable de supprimer ces défauts qui, s'ils subsistent, risquent de provoquer des stries lors de l'essuyage, d'aboutir à des dépôts localisés de graphite sur la vitre, etc. It is indeed desirable to remove these defects which, if they persist, risk causing streaks during wiping, leading to localized deposits of graphite on the glass, etc.

Le brossage permet ainsi de supprimer les excès de graphite, d'éliminer les particules de graphite qui adhèrent mal à la lame d'essuyage et d'homogénéiser les particules de graphite en orientant les lamelles dans le même sens. Le brossage permet aussi de détecter la présence du revêtement car le brossage provoque un changement du brillant spéculaire du revêtement qui passe de la couleur noir mat à une teinte gris métallisé. Brushing thus makes it possible to remove excess graphite, to eliminate the particles of graphite which adhere badly to the wiping blade and to homogenize the particles of graphite by orienting the lamellae in the same direction. Brushing also makes it possible to detect the presence of the coating because brushing causes a change in the specular gloss of the coating which changes from the matt black color to a metallic gray shade.

Les brosses peuvent être remplacées par des galets de "brossage" qui sont par exemple réalisés en feutre ou en matériau alvéolaire, les galets présentant des profils complémentaires de celui de la lame à brosser. The brushes can be replaced by "brushing" rollers which are for example made of felt or of cellular material, the rollers having profiles complementary to that of the blade to be brushed.

A titre de variante, le brossage peut être remplacé par une opération équivalente résultant de la projection à haute pression de jets d'eau sur la lame revêtue.  Alternatively, brushing can be replaced by an equivalent operation resulting from the high pressure spraying of water jets onto the coated blade.

Claims (14)

REVENDICATIONS 1. Composition pour réaliser un revêtement sur une lame d'essuyage, en caoutchouc ou en élastomère, d'un essuie-glace de véhicule automobile, caractérisée en ce qu'elle comporte une poudre, notamment de carbone cristallin sous forme de graphite naturel ou artificiel, dispersée en suspension dans un liquide vecteur, et un agent gélifiant. 1. Composition for producing a coating on a wiper blade, made of rubber or elastomer, of a motor vehicle windscreen wiper, characterized in that it comprises a powder, in particular of crystalline carbon in the form of natural graphite or artificial, dispersed in suspension in a carrier liquid, and a gelling agent. 2. Composition selon la revendication 1, caractérisée en ce que le liquide vecteur est de l'eau. 2. Composition according to claim 1, characterized in that the carrier liquid is water. 3. Composition selon la revendication 2, caractérisée en ce que l'agent gélifiant est un produit à base d'algues, notamment de l'alginate ou du caragénate. 3. Composition according to claim 2, characterized in that the gelling agent is a product based on algae, in particular alginate or caragenate. 4. Composition selon l'une quelconque des revendications précédentes, caractérisée en ce que la proportion en poids de l'agent gélifiant dans la composition est égale à environ 0,5%. 4. Composition according to any one of the preceding claims, characterized in that the proportion by weight of the gelling agent in the composition is equal to approximately 0.5%. 5. Composition selon l'une quelconque des revendications précédentes, caractérisée en ce que la poudre est une poudre de graphite, naturel ou artificiel, dont la proportion en poids dans la composition est égale à environ 15%. 5. Composition according to any one of the preceding claims, characterized in that the powder is a graphite powder, natural or artificial, whose proportion by weight in the composition is equal to about 15%. 6. Composition selon la revendication 2, caractérisée en ce que la poudre est mise en suspension dans l'eau par addition d'un agent tensioactif. 6. Composition according to claim 2, characterized in that the powder is suspended in water by addition of a surfactant. 7. Composition selon l'une quelconque des revendications précédentes, caractérisée en ce l'agent gélifiant est incorporé à la composition après la mise en suspension de la poudre 7. Composition according to any one of the preceding claims, characterized in that the gelling agent is incorporated into the composition after the powder has been suspended. 8. Composition selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comporte un agent pour empêcher la formation de mousse lors du mélange des composants de la composition. 8. Composition according to any one of the preceding claims, characterized in that it comprises an agent for preventing the formation of foam when the components of the composition are mixed. 9. Composition selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comporte un agent imperméabilisant. 9. Composition according to any one of the preceding claims, characterized in that it comprises a waterproofing agent. 10. Composition selon la revendication 9, caractérisée en ce que l'agent imperméabilisant est un copolymère acrylique additionné de cire. 10. Composition according to claim 9, characterized in that the waterproofing agent is an acrylic copolymer added with wax. 11. Procédé pour revêtir la lame d'essuyage d'un essuieglace d'un revêtement qui réduit le coefficient de frottement entre la lame d'essuyage et la surface vitrée à essuyer, caractérisé en ce que l'on utilise une composition conforme à l'une quelconque des revendications précédentes pour enduire la lame d'essuyage, ou immerger la lame d'essuyage dans la composition, ou pulvériser la composition sur la lame d'essuyage, puis en ce que l'on fait sécher la lame d'essuyage. 11. Method for coating the wiper blade with a wiper of a coating which reduces the coefficient of friction between the wiper blade and the glass surface to be wiped, characterized in that a composition in accordance with l is used 'any one of the preceding claims for coating the wiping blade, or immersing the wiping blade in the composition, or spraying the composition on the wiping blade, and then drying the wiping blade . 12. Procédé selon la revendication 11, caractérisé en ce que, après avoir fait sécher la lame d'essuyage, on procède à un brossage de la lame munie de son revêtement. 12. Method according to claim 11, characterized in that, after drying the wiping blade, brushing is carried out on the blade provided with its coating. 13. Procédé selon la revendication 12, caractérisé en ce que le brossage est effectué en faisant passer longitudinalement la lame d'essuyage entre deux brosses adjacentes et tournant en sens inverse l'une de l'autre. 13. Method according to claim 12, characterized in that the brushing is carried out by passing the wiper blade longitudinally between two adjacent brushes and rotating in opposite directions to one another. 14. Procédé selon la revendication 13, caractérisé en ce que les brosses tournent dans le sens opposé à la direction d'avancement de la lame d'essuyage entre les brosses.  14. The method of claim 13, characterized in that the brushes rotate in the opposite direction to the direction of advance of the wiper blade between the brushes.
FR9611995A 1996-10-02 1996-10-02 COMPOSITION FOR PERFORMING A COATING ON A WIPER BLADE OF A WINDSCREEN WIPER, AND METHOD FOR COATING A WIPING BLADE OF SUCH A COATING Expired - Lifetime FR2753987B1 (en)

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Publication number Priority date Publication date Assignee Title
FR2977258A1 (en) * 2011-06-28 2013-01-04 Valeo Systemes Dessuyage Aqueous composition, useful for renovation of a wiper of windshield wiper brush, comprises black filler, preferably graphite powder, binder comprising polyurethane acrylic resin, dispersing agent, spreading agent and thickening agent
US20160368459A1 (en) * 2015-06-16 2016-12-22 Valeo Systèmes d'Essuyage Windscreen wiper blade incorporating a heat-conducting material

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