EP1358947A1 - Procédé d'application d'un vernis comprenant un solvant ou non sur une pièce, notamment un réflecteur de projecteur de véhicule - Google Patents
Procédé d'application d'un vernis comprenant un solvant ou non sur une pièce, notamment un réflecteur de projecteur de véhicule Download PDFInfo
- Publication number
- EP1358947A1 EP1358947A1 EP03290953A EP03290953A EP1358947A1 EP 1358947 A1 EP1358947 A1 EP 1358947A1 EP 03290953 A EP03290953 A EP 03290953A EP 03290953 A EP03290953 A EP 03290953A EP 1358947 A1 EP1358947 A1 EP 1358947A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- varnish
- approximately
- temperature
- application
- radiation
- 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
Links
- 239000002966 varnish Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000002904 solvent Substances 0.000 title claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 14
- 230000005855 radiation Effects 0.000 claims description 13
- 238000006116 polymerization reaction Methods 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 238000009736 wetting Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 13
- 239000000203 mixture Substances 0.000 description 10
- 239000004412 Bulk moulding compound Substances 0.000 description 9
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- INQDDHNZXOAFFD-UHFFFAOYSA-N 2-[2-(2-prop-2-enoyloxyethoxy)ethoxy]ethyl prop-2-enoate Chemical compound C=CC(=O)OCCOCCOCCOC(=O)C=C INQDDHNZXOAFFD-UHFFFAOYSA-N 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 6
- 239000004925 Acrylic resin Substances 0.000 description 5
- 229920000178 Acrylic resin Polymers 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- ZDQNWDNMNKSMHI-UHFFFAOYSA-N 1-[2-(2-prop-2-enoyloxypropoxy)propoxy]propan-2-yl prop-2-enoate Chemical compound C=CC(=O)OC(C)COC(C)COCC(C)OC(=O)C=C ZDQNWDNMNKSMHI-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- ZNAAXKXXDQLJIX-UHFFFAOYSA-N bis(2-cyclohexyl-3-hydroxyphenyl)methanone Chemical compound C1CCCCC1C=1C(O)=CC=CC=1C(=O)C1=CC=CC(O)=C1C1CCCCC1 ZNAAXKXXDQLJIX-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000004807 desolvation Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- FSDNTQSJGHSJBG-UHFFFAOYSA-N piperidine-4-carbonitrile Chemical compound N#CC1CCNCC1 FSDNTQSJGHSJBG-UHFFFAOYSA-N 0.000 description 3
- FIHBHSQYSYVZQE-UHFFFAOYSA-N 6-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound C=CC(=O)OCCCCCCOC(=O)C=C FIHBHSQYSYVZQE-UHFFFAOYSA-N 0.000 description 2
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Natural products CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 2
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 2
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 239000003677 Sheet moulding compound Substances 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 2
- 238000005269 aluminizing Methods 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- -1 aryl ketone Chemical class 0.000 description 2
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001465 metallisation Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000028016 temperature homeostasis Effects 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- XQJVPRPVPQNSIE-UHFFFAOYSA-N CC(O)=O.COC=CC Chemical compound CC(O)=O.COC=CC XQJVPRPVPQNSIE-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 241001080024 Telles Species 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 229940082150 encore Drugs 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000007974 melamines Chemical class 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000013008 thixotropic agent Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 150000003738 xylenes Chemical class 0.000 description 1
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
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/062—Pretreatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- 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
- B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
- B05D5/067—Metallic effect
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
Definitions
- the present invention relates to a method of applying a varnish comprising a solvent or not on a part, in particular a vehicle headlamp reflector.
- the Applicant has set itself in particular as objective of ensuring excellent performance when applying a varnish on reflector type parts of vehicle headlamps while limiting its propensities to sink on the surface after application and without reducing the appearance qualities of the coating film basic.
- the present invention provides a method of applying a varnish comprising a solvent or not on a part, in particular a vehicle headlight reflector, characterized in that it comprises the following steps consisting in (i ) choose a varnish with a viscosity at room temperature of around 500 mPa.s to around 2000 mPa.s and a viscosity at application temperature lower than around 200 mPa.s with a viscosity substantially independent of the temperature variation in the application range (ii) heating the surface of the part before the varnish wetting step to a chosen temperature ⁇ p1, (iii) heating the varnish at the time of application to a chosen temperature ⁇ v and ( iv) maintain the part during the tensioning at a chosen temperature ⁇ p 2 and a chosen duration tp 2 .
- Varnishes containing a solvent or not are generally made up of resins whose viscosity is directly related to temperature.
- the process according to the invention which can be implemented indifferently in the case of a varnish with or without solvent allows, by the choice of appropriate varnish temperatures, to guarantee excellent application performance, in particular by spraying.
- the choice of room temperatures to be varnished before application and during the stretch, also allows control and optimize in particular the wettability and the "Mobility" of the varnish.
- the viscosity varnish practically reaches its optimal value. Applied on a hot surface, on the one hand excellent wettability is obtained and on the other hand the boiling of the varnish is accelerated. At cooling, viscosity increasing rapidly, the risks are reduced.
- step (ii) of the method according to the invention consists of heating by radiation, convection or conduction, for example using a formatting tool and step (iv) consists of heating by radiation or convection.
- This kind of heating ensures correct tension, i.e. an optical surface as smooth as possible.
- the varnish being with solvent ⁇ v is from approximately 20 ° C to approximately 40 ° C
- ⁇ p 1 is from approximately 20 ° C to approximately 50 ° C
- ⁇ p 2 and tp 2 from about 20 ° C to about 50 ° C and about 0.5 min to 3 min, respectively.
- the solvent typically represents about 20% to about 75% by weight of the overall composition of varnish
- the solvent does not represent more than 10% by weight of the overall composition of the varnish used in the process the invention.
- the process desolvation times according to the invention are therefore considerably reduced, which greatly lowers its cost.
- the varnish being solvent-free
- the temperature ⁇ v is approximately 40 ° C to approximately 60 ° C
- the temperature ⁇ p 1 is approximately 70 ° C to approximately 110 ° C
- the temperature ⁇ p 2 is approximately 50 ° C to approximately 90 ° C
- the duration tp 2 is approximately 0.5 min to approximately 1.5 min.
- an application method of a UV varnish includes the classic steps of washing with water of the part, drying, UV pretreatment, application of varnish heated or so-called “wetting”, “stretched”, polymerization step UV and metallization.
- the method according to the invention can be applied to any room able to withstand transient temperatures up to around 110 ° C.
- thermosetting material useful in the process of the invention, mention may be made of solid molding mixtures or BMC for “bulk molding compounds” (or their variants such as that CIC, for “continuous impregnated compounds”, TMC, for “Thick molding compounds” or even SMC for “sheet molding compounds ”) which are resin-based compositions unsaturated polyester reinforced with glass fibers. Pieces in phenolic, vinyl or epoxy resins or even melamines urea-formalin may also be suitable.
- UV varnish useful in the process of the invention, may cite the compositions conventionally comprising a acrylic resin or a mixture of acrylic resins and optionally one or more solvents.
- the suitable solvents are for example the solvents ester type, such as for example ethyl acetate vinyl or butyl acetate or glycol ester type such as methoxypropylene acetate (MPA) or, of ketone type, such as for example methyl isobutyl ketone (MIBK) or methyl ethyl ketone (MEK) or of alcohol type such as butyl alcohol or of aromatic type such as toluene, xylenes by example.
- solvents ester type such as for example ethyl acetate vinyl or butyl acetate or glycol ester type such as methoxypropylene acetate (MPA) or, of ketone type, such as for example methyl isobutyl ketone (MIBK) or methyl ethyl ketone (MEK) or of alcohol type such as butyl alcohol or of aromatic type such as toluene, xylenes by example.
- MIBK methyl
- the thickness of the layer of varnish obtained is of the order from 10 to 25 ⁇ m.
- the above application range allows production a part with the necessary optical qualities to a headlight reflector of a motor vehicle (the gloss, the tense and respect for the optical surface).
- the thermal resistance properties (30 min at 200 ° C) and resistance to humid heat (7 days at 70 ° C and 95% residual humidity) are such that after the tests the appearance of the metallization remains unchanged.
- the thickness of the base coating layer obtained is about 10 ⁇ m minimum and can reach about 15 ⁇ m about 50 ⁇ m in a single gun pass.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Paints Or Removers (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
- le vernis est appliqué par aspersion sous pression (« airless »), au pistolet à air comprimé ou électrostatique ; de manière avantageuse le pistolet est équipé d'une boucle de circulation thermorégulée : ce qui permet d'abaisser la viscosité du vernis et d'avoir une température v et un débit de vernis constants au moment de la pulvérisation au pistolet. Sans cette boucle, comme le pistolet fonctionne par intermittence, se posent des problèmes de contrôle de température ; l'épaisseur de la couche de vernis est obtenue en un seul passage du pistolet : le vernis se dépose parfaitement sur la pièce, il n'y a pas de retouche à faire ; lorsque le vernis appliqué au pistolet est un vernis sans solvant, cela permet des variations d'épaisseurs importantes compatibles avec la géométrie complexe de la surface à couvrir, ce qui augmente la robustesse du procédé ; à épaisseur identique, deux passages de pistolet sont en général nécessaires dans le cas d'un vernis avec solvant.
- le vernis est un vernis UV : comparé aux vernis dits thermiques, les vernis UV assurent un gain de temps certain car une fois l'aspect recherché obtenu ce dernier est « figé » pratiquement instantanément comparé aux durées de l'ordre de 5 min à 10 min nécessaires avec les vernis thermiques, durées pendant lesquelles l'atmosphère des installations doit rester très propre « hors poussière ».
- appliqué sur une pièce telle qu'un BMC, le procédé comporte une étape de prétraitement par rayonnement UV d'environ 1 J/cm2 à environ 4 J/cm2 avec une puissance maximale d'environ 130 mW à environ 250 mW, mesurée dans la bande UVA et dans un plan sensiblement perpendiculaire au rayonnement moyen de la zone d'éclairage UV. L'efficacité de traitement de la surface de la pièce et l'adhérence du vernis sur le BMC sont ainsi garanties.
- le procédé comporte une étape de polymérisation par rayonnement UV entre environ 4 J/cm2 et environ 8 J/cm2, de préférence d'environ 2 J/cm2 à environ 4 J/cm2 avec une puissance d'environ 80 mW à environ 200 mW, mesurée dans la bande UVA, et dans un plan sensiblement perpendiculaire au rayonnement moyen de la zone d'éclairage UV. On obtient ainsi une surface brillante, tendue, apte à être métallisée.
- il est prévu une optimisation de l'orientation du rayonnement de chaque émetteur ou la mise en mouvement de la pièce à traiter, ce qui permet de garantir un éclairement homogène quelle que soit la complexité de la surface insolée ; dans la pratique les émetteurs sont inclinés pour prendre en compte l'orientation des faces de la pièce ;
- à l'étape de polymérisation UV, la température de vernis p2 étant élevée, le vernis est plus réactif. Cette augmentation de réactivité permet de réduire de façon notable le nombre d'émetteurs UV tout en polymérisant des zones généralement difficiles à insoler ;
- le procédé comporte une étape de mise en rotation de la pièce selon un axe horizontal au cours de l'étape de tendu et/ou de polymérisation, ce qui permet d'éviter les coulures et d'augmenter à l'application l'épaisseur maximale de la couche déposée et ce quelle que soit la forme de la pièce à traiter. Ainsi est augmentée la robustesse du procédé d'application.
- polymères ou copolymères d'esters de l'acide acrylique tels que des oligomères acrylate multifonctionnels, par exemple de type époxy acrylate, uréthanne acrylate aliphatique ou aromatique, polyester acrylate, acrylique acrylate ; ces composés sont typiquement des liquides visqueux présentant à 25°C une viscosité d'environ plusieurs milliers à environ plus d'un million de centipoise (cP), présentent en général de 2 à 6 groupes acrylates par molécule et possèdent un poids moléculaire d'environ 500 à environ 20000,
- monomères acrylates multifonctionnels possédant en général de 1 à 4 groupes acrylate par molécule et un poids moléculaire d'environ 150 à environ 500, leur viscosité à 25°C étant d'environ 5 à environ 200 cP,
- l'hexanedioldiacrylate (HDDA), le tripropylèneglycoldiacrylate (TPGDA), le triéthylèneglycoldiacrylate (TEGDA) et le dipropylèneglycoldiacrylate (DPGDA) et des monomères du type acide acrylique,
- un ou plusieurs photo-initiateurs du type arylcétones, par exemple la benzophénone, l'hydroxycyclohexylphénylcétone (HCPK), la 2,2-diméthoxy-1,2-diphénylméthan-1-one ;
- Un ou plusieurs agents tensioactifs du type alkylpolysiloxane tel que le diméthylpolysiloxane ou encore le méthacrylatesiloxane, un polyethersiloxane ou polyestersiloxane.
- D'autres additifs peuvent être ajoutés aux composés précédents, comme par exemple un ou plusieurs agents antimousse, promoteurs d'adhérence, agents thixotropes, stabilisants, colorants, etc.
- nature du vernis : résine acrylique comportant de l'acétate de vinyle à raison de 5% en poids de la composition globale du vernis) ; le vernis présentant une viscosité à température ambiante d'environ 500 mPa.s à 2000 mPa.s et une viscosité à la température d'application inférieure à environ 200 mPa.s avec une viscosité sensiblement indépendante de la variation de la température dans la gamme d'application ;
- prétraitement UV (Dose : 4 J/cm2 ; puissance : 160 mW/cm2, mesurée en UVA) ;
- chauffage des pièces à 40°C avant mouillage;
- chauffage du vernis (température de pulvérisation au pistolet à air comprimé avec boucle de thermorégulation: 35 °C) ;
- maintien de la température pendant le tendu (température de « flash off» : 35°C pendant 1 min ; pièces en rotation : 2 RPM) ;
- polymérisation UV (Dose 6 J/cm2 ; puissance 160 mW/cm2, mesurée en UVA)
- aluminiage
- nature du vernis : résine acrylique (% de volatiles inférieur à 1%) ; le vernis présentant une viscosité à température ambiante d'environ 500 mPa.s à 2000 mPa.s et une viscosité à la température d'application inférieure à environ 200 mPa.s avec une viscosité sensiblement indépendante de la variation de la température dans la gamme d'application ;
- chauffage ou maintien des pièces à 90°C
- prétraitement UV (Dose : 2 J/cm2 ; puissance : 160 mW/cm2, mesurée en UVA) ;
- chauffage ou maintien des pièces à 90°C avant mouillage ;
- chauffage du vernis (température de pulvérisation au pistolet à air comprimé avec boucle de thermorégulation: 45 °C ;
- maintien de la température pendant le tendu (température de « flash off» : 70°C pendant 1,5 min ; pièces en rotation : 2 RPM) ;
- polymérisation UV (Dose 2 J/cm2 ; puissance 160 mW/cm2, mesurée en UVA) ;
- aluminiage
Claims (11)
- Procédé d'application d'un vernis comprenant un solvant ou non sur une pièce, notamment un réflecteur de projecteur de véhicule, caractérisé en ce qu'il comporte les étapes suivantes consistant à (i) choisir un vernis présentant une viscosité à température ambiante d'environ 500 mPa.s à 2000 mPa.s et une viscosité à la température d'application inférieure à environ 200 mPa.s avec une viscosité sensiblement indépendante de la variation de la température dans la gamme d'application (ii) chauffer la surface de la pièce avant l'étape de mouillage du vernis à une température choisie p1, (iii) chauffer le vernis au moment de l'application à une température choisie v et (iv) maintenir la pièce pendant la réalisation du tendu à une température choisie p2 et une durée choisie tp2.
- Procédé selon la revendication 1, caractérisé en ce que l'étape (ii) consiste à chauffer par rayonnement, convection ou conduction et l'étape (iv) consiste à chauffer par rayonnement ou convection.
- Procédé selon la revendication 1 ou 2, caractérisé en ce que le vernis comprenant un solvant, v est d'environ 20°C à environ 40°C, p1 est d'environ 20°C à environ 50°C, et p2 et tp2 d'environ 20°C à environ 50 °C et environ 0,5 min à 3 min, respectivement.
- Procédé selon la revendication 1 ou 2, caractérisé en ce que vernis étant sans solvant, la température v est d'environ 40°C à environ 60°C, la température p1 est d'environ 70°C à environ 110°C, la température p2 est d'environ 50°C à environ 90°C et la durée tp2 est d'environ 0,5 min à environ 1,5 min.
- Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'application est réalisée par aspersion sous pression (« airless »), au pistolet à air comprimé ou électrostatique.
- Procédé selon la revendication 5, caractérisé en ce que le pistolet à air comprimé est équipé d'une boucle de circulation thermorégulée.
- Procédé selon l'une quelconque des revendications précédentes caractérisé en ce que le vernis est un vernis UV.
- Procédé selon la revendication 7, caractérisé en ce qu'il est appliqué sur une pièce telle qu'un BMC et en ce qu'il comporte une étape de prétraitement par rayonnement UV d'environ 1 J/cm2 à environ 4 J/cm2 avec une puissance maximale d'environ 130 mW à environ 250 mW, mesurée dans la bande UVA et dans un plan sensiblement perpendiculaire au rayonnement moyen de la zone d'éclairage UV.
- Procédé selon la revendication 7 ou 8, caractérisé en ce qu'il comporte une étape de polymérisation par rayonnement UV d'environ 2 J/cm2 à environ 4 J/cm2 avec une puissance d'environ 80 mW à environ 200 mW, mesurée dans la bande UVA, et dans un plan sensiblement perpendiculaire au rayonnement moyen de la zone d'éclairage UV.
- Procédé selon l'une quelconque des revendications précédentes caractérisé en ce qu'il comporte une étape de mise en rotation de la pièce selon un axe horizontal au cours de l'étape de tendu et/ou de polymérisation.
- Procédé selon l'une quelconque des revendications 5 à 10, caractérisé en ce que l'épaisseur de la couche de vernis est obtenue en un seul passage du pistolet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0205531 | 2002-04-30 | ||
| FR0205531A FR2838987B1 (fr) | 2002-04-30 | 2002-04-30 | Procede d'application d'un vernis comprenant un solvant ou non sur une piece, notamment un reflecteur de projecteur de vehicule |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1358947A1 true EP1358947A1 (fr) | 2003-11-05 |
| EP1358947B1 EP1358947B1 (fr) | 2004-09-29 |
Family
ID=28800123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03290953A Expired - Lifetime EP1358947B1 (fr) | 2002-04-30 | 2003-04-16 | Procédé d'application d'un vernis comprenant un solvant ou non sur une pièce, notamment un réflecteur de projecteur de véhicule |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6773761B2 (fr) |
| EP (1) | EP1358947B1 (fr) |
| JP (1) | JP2003326212A (fr) |
| AT (1) | ATE277694T1 (fr) |
| DE (1) | DE60300061T2 (fr) |
| ES (1) | ES2229193T3 (fr) |
| FR (1) | FR2838987B1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004039506A3 (fr) * | 2002-10-28 | 2004-11-04 | Nordson Corp | Reparation de la rainure d'un couvercle d'une boite de boisson au moyen d'un materiau pouvant secher sous uv |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4899291B2 (ja) * | 2004-04-13 | 2012-03-21 | 住友ベークライト株式会社 | コーティング方法 |
| JP4805628B2 (ja) * | 2005-08-03 | 2011-11-02 | 豊田合成株式会社 | 複層塗膜形成方法、これに用いる塗料および塗装物品 |
| BRPI0600493B1 (pt) * | 2006-02-16 | 2015-07-21 | Magneti Marelli Sist S Automotivos Indústria E Comércio Ltda | Processo de envernização de lente e refletor de um componente de iluminação de um veículo. |
| US8801860B1 (en) * | 2008-10-01 | 2014-08-12 | Thomas M. Wall | Method and kit for restoring a vehicle headlight lens |
| DE102011100737A1 (de) * | 2011-05-06 | 2012-11-08 | Baumer Hhs Gmbh | Beschichtungsverfahren |
| DE102012017538A1 (de) * | 2012-09-05 | 2014-03-06 | Heidelberger Druckmaschinen Ag | Verfahren zum Bebildern und/oder Lackieren der Oberfläche von Gegenständen |
| JP6602358B2 (ja) * | 2017-05-16 | 2019-11-06 | 関西ペイント株式会社 | 塗膜形成方法 |
| US10544499B1 (en) * | 2018-08-13 | 2020-01-28 | Valeo North America, Inc. | Reflector for vehicle lighting |
| JP7505908B2 (ja) * | 2020-04-16 | 2024-06-25 | 株式会社ウエノコーポレーション | スプレーガンを用いた補修用塗料の塗装方法と塗装装置 |
| US12180411B2 (en) | 2023-04-27 | 2024-12-31 | Valeo Vision | Thermally conductive component with a bulk molded compound and no base coat |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1436606A (fr) * | 1964-02-04 | 1966-04-29 | Herberts & Co Gmbh Dr Kurt | Procédé de préparation d'enduits vernissés à partir de polyesters non saturés et de composés vinyliques greffables |
| GB1386324A (en) * | 1971-07-21 | 1975-03-05 | Gen Electric | Method for coating substrates and apparatus employed in such method |
| FR2447794A1 (fr) * | 1979-02-05 | 1980-08-29 | Valentine Cie Vernis | Procede de revetement de matieres plastiques thermodurcissables et produits obtenus selon ce procede |
| FR2483267A2 (fr) * | 1977-12-27 | 1981-12-04 | Vianova Kunstharz Ag | Procede de mise en peinture et/ou de vernissage par pulverisation au moyen d'un dispositif a plusieurs buses |
| EP0681000A1 (fr) * | 1994-04-29 | 1995-11-08 | BASF Aktiengesellschaft | Objets constitués de masse à mouler BMC à base de polyesters insaturés et ayant une surface améliorée |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT355161B (de) | 1977-12-27 | 1980-02-25 | Vianova Kunstharz Ag | Lackierverfahren |
-
2002
- 2002-04-30 FR FR0205531A patent/FR2838987B1/fr not_active Expired - Fee Related
-
2003
- 2003-04-16 AT AT03290953T patent/ATE277694T1/de not_active IP Right Cessation
- 2003-04-16 EP EP03290953A patent/EP1358947B1/fr not_active Expired - Lifetime
- 2003-04-16 DE DE60300061T patent/DE60300061T2/de not_active Expired - Lifetime
- 2003-04-16 ES ES03290953T patent/ES2229193T3/es not_active Expired - Lifetime
- 2003-04-28 JP JP2003123681A patent/JP2003326212A/ja active Pending
- 2003-04-28 US US10/424,481 patent/US6773761B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1436606A (fr) * | 1964-02-04 | 1966-04-29 | Herberts & Co Gmbh Dr Kurt | Procédé de préparation d'enduits vernissés à partir de polyesters non saturés et de composés vinyliques greffables |
| GB1386324A (en) * | 1971-07-21 | 1975-03-05 | Gen Electric | Method for coating substrates and apparatus employed in such method |
| FR2483267A2 (fr) * | 1977-12-27 | 1981-12-04 | Vianova Kunstharz Ag | Procede de mise en peinture et/ou de vernissage par pulverisation au moyen d'un dispositif a plusieurs buses |
| FR2447794A1 (fr) * | 1979-02-05 | 1980-08-29 | Valentine Cie Vernis | Procede de revetement de matieres plastiques thermodurcissables et produits obtenus selon ce procede |
| EP0681000A1 (fr) * | 1994-04-29 | 1995-11-08 | BASF Aktiengesellschaft | Objets constitués de masse à mouler BMC à base de polyesters insaturés et ayant une surface améliorée |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004039506A3 (fr) * | 2002-10-28 | 2004-11-04 | Nordson Corp | Reparation de la rainure d'un couvercle d'une boite de boisson au moyen d'un materiau pouvant secher sous uv |
Also Published As
| Publication number | Publication date |
|---|---|
| US20030203107A1 (en) | 2003-10-30 |
| FR2838987B1 (fr) | 2004-06-11 |
| EP1358947B1 (fr) | 2004-09-29 |
| DE60300061D1 (de) | 2004-11-04 |
| JP2003326212A (ja) | 2003-11-18 |
| ES2229193T3 (es) | 2005-04-16 |
| US6773761B2 (en) | 2004-08-10 |
| DE60300061T2 (de) | 2006-02-23 |
| FR2838987A1 (fr) | 2003-10-31 |
| ATE277694T1 (de) | 2004-10-15 |
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