EP1273357B1 - Verfahren zum Anstreichen von Karosserieteilen - Google Patents

Verfahren zum Anstreichen von Karosserieteilen Download PDF

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Publication number
EP1273357B1
EP1273357B1 EP02291686A EP02291686A EP1273357B1 EP 1273357 B1 EP1273357 B1 EP 1273357B1 EP 02291686 A EP02291686 A EP 02291686A EP 02291686 A EP02291686 A EP 02291686A EP 1273357 B1 EP1273357 B1 EP 1273357B1
Authority
EP
European Patent Office
Prior art keywords
composite material
primary coating
ultraviolet radiation
support
smc
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.)
Expired - Lifetime
Application number
EP02291686A
Other languages
English (en)
French (fr)
Other versions
EP1273357A1 (de
Inventor
Michel Recouvreur
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ranger France SAS
Original Assignee
Ranger France SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ranger France SAS filed Critical Ranger France SAS
Publication of EP1273357A1 publication Critical patent/EP1273357A1/de
Application granted granted Critical
Publication of EP1273357B1 publication Critical patent/EP1273357B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/546—No clear coat specified each layer being cured, at least partially, separately
    • 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
    • B05D3/063—Pretreatment of polymeric substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • 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
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • B05D1/045—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field on non-conductive substrates

Definitions

  • the present invention relates to a method of painting parts of polyester composite material such as, for example, motor vehicle body parts.
  • Parts made of SMC (sheet molding compound) or BMC (bulk molding compound) composite materials are increasingly used to replace metal parts in the manufacture of all types of equipment because of their low manufacturing cost, their absence of corrosion and their resistance to shocks in particular.
  • these parts conventionally formed by molding a polyester resin reinforced with fibers of various kinds find application in the production of bumpers, doors, hoods or roofs for example.
  • their use directly at the outlet of the mold can not be envisaged on a vehicle because these polyester composite materials generally have imperfections on the surface which do not make it possible to guarantee to these parts, once painted, a quality of surface known under the name of class A.
  • the present invention therefore provides a painting process which provides a flawless surface appearance, without imperfections, similar to that obtainable on metal parts.
  • An object of the invention is a simple process that can be carried out at relatively low temperature (especially at room temperature) and at atmospheric pressure.
  • Another aim is to propose a process that can easily be integrated into the conventional processes of manufacturing industrial equipment and in particular motor vehicles.
  • This composite material is preferably a polyester composite material of the SMC LP type (Sheet Molding Compound Low Profile).
  • This process which uses a low temperature UV firing, makes it possible to eliminate the usual thermal stresses (deformation, expansion, etc.) that composite materials undergo with the painting processes of the prior art.
  • the very short cooking time of the process of the invention compared to those required for traditional oven cooking generates a significant increase in productivity as processing capabilities.
  • the primary coating with low organic solvent content is of the acrylic polyester type.
  • the low viscosity of this type of primary coating makes it possible to obtain a penetration and recovery rate in the very high composite material.
  • the kinetics of rapid crosslinking of the primary coating gives the composite material a perfect seal and a very strong decrease in degassing phenomena during or after the deposition of the paint layers.
  • a support material 10 to which the painting process of the invention is applied is as follows.
  • This material is a polyester composite material which can be in various forms including that of a sheet-molded material (SMC sheet molding compound).
  • SMC sheet molding compound sheet molding compound low profile
  • SMC LP sheet molding compound low profile
  • the first step of this process (FIG. 1) consists first of all, from a wavelength source of heat. , of determined power and surface energy, to activate the surface of this support by a first ultraviolet radiation (UV 12) in order to facilitate the adhesion of the upper layers of the support by opening its chemical bonds, then in a second step ( FIG. 2) to cover the surface of this support with a primary coating 14 with a low level of organic solvent (representing less than 50% by weight of the primary coating).
  • This primary coating which acts as a sealer is a varnish called "high dry extract” that is to say whose dry matter remaining after removal of solvents is greater than 50% of the initial mass of the primary coating.
  • This specific composition with low viscosity allows a high penetration and recovery rate in the micropores of the support material.
  • This type of primary coating is example available among the products of the family of acrylic polyesters of the Dutch company AKZOVERILAC.
  • a third step of the process of the invention is carried out (FIG. 3) in the firing of this primary coating by subjecting it to a second ultraviolet radiation (UV 16). from a previous heat source subjected to a wavelength, a determined power and surface energy.
  • UV 16 ultraviolet radiation
  • This cooking by UV irradiation at low temperature and at atmospheric pressure will cause, in a few seconds only, a crosslinking of the primary coating (that is to say an association between them to form a network of macromolecules constituting the primary coating) favoring its capture in the support (the primary coating / support adhesion).
  • this low temperature cooking also makes it possible to eliminate the thermal stresses (expansion, deformation, etc.) usually experienced by the support material in conventional oven-baking processes.
  • the particularly short duration of the UV cooking step compared to that of traditional baking that can reach a few tens of minutes, significantly increases productivity.
  • the last stage of the process then consists in applying, in a conventional manner to the support thus covered by the primary coating, one or more layers of paint 18.
  • This paint is preferably a two-component polyurethane paint or even a single-component melamine-based paint. oven baking "applied by electrostatic spraying in the temperature conditions of between 80 ° and 200 ° C depending on the type of paint. It should be noted that the application of these Paint layers are facilitated by the presence of conductive particles (carbon in graphite form) at the same level of the composite support.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Laminated Bodies (AREA)

Claims (6)

  1. Verfahren zum Lackieren von Teilen aus Verbundwerkstoff (10), bei dem zunächst das Teil durch eine Ultraviolettstrahlung (12) aktiviert wird, anschließend das genannte Teil mit einer Primärbeschichtung mit geringem Gehalt an organischem Lösungsmittel (14) überzogen wird, dann diese für einige Sekunden einer Ultraviolettstrahlung (16) ausgesetzt wird und schließlich wenigstens eine Lackierschicht (18) auf die der UV-Strahlung ausgesetzte Primärbeschichtung aufgetragen wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der erste Schritt des Aussetzens der Ultraviolettstrahlung ein Öffnen der chemischen Bindungen des Teils aus Verbundwerkstoff umfaßt.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der zweite Schritt des Aussetzens der Ultraviolettstrahlung ein Aushärten der Primärbeschichtung durch Vernetzung umfaßt.
  4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Verbundwerkstoff ein Polyester-Verbundwerkstoff ist.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß der Polyester-Verbundwerkstoff vom Typ SMC LP (Sheet Molding Compound Low Profile) ist.
  6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die genannte Primärbeschichtung mit geringem Gehalt an organischem Lösungsmittel vom Acryl polyestertyp ist.
EP02291686A 2001-07-06 2002-07-05 Verfahren zum Anstreichen von Karosserieteilen Expired - Lifetime EP1273357B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0109001A FR2826883B1 (fr) 2001-07-06 2001-07-06 Procede de mise en peinture de pieces de carrosserie
FR0109001 2001-07-06

Publications (2)

Publication Number Publication Date
EP1273357A1 EP1273357A1 (de) 2003-01-08
EP1273357B1 true EP1273357B1 (de) 2006-09-06

Family

ID=8865207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02291686A Expired - Lifetime EP1273357B1 (de) 2001-07-06 2002-07-05 Verfahren zum Anstreichen von Karosserieteilen

Country Status (4)

Country Link
EP (1) EP1273357B1 (de)
AT (1) ATE338588T1 (de)
DE (1) DE60214478T2 (de)
FR (1) FR2826883B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2872068B1 (fr) * 2004-06-28 2006-10-27 Centre Nat Rech Scient Cnrse Procede et dispositif pour le depot de couches minces par pulverisation electrohydrodynamique, notamment en post-decharge
DE102019131521A1 (de) * 2019-11-21 2021-05-27 Rehau Ag + Co Verfahren zum Beschichten eines Kunststoffbauteils und Kunststoffbauteil

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2969926B2 (ja) * 1990-11-20 1999-11-02 住友化学工業株式会社 ポリプロピレン系樹脂成形品の塗装方法
EP0575798B1 (de) * 1992-06-19 1997-11-05 Fuji Polymertech Co., Ltd Verfahren zur Herstellung einer Fingertaste für einen Handhabeschalter

Also Published As

Publication number Publication date
EP1273357A1 (de) 2003-01-08
FR2826883A1 (fr) 2003-01-10
ATE338588T1 (de) 2006-09-15
DE60214478D1 (de) 2006-10-19
FR2826883B1 (fr) 2003-12-12
DE60214478T2 (de) 2007-05-31

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