EP0773840B1 - Verfahren zur herstellung und ausbesserung von mehrschichtigen effektlackierungen - Google Patents

Verfahren zur herstellung und ausbesserung von mehrschichtigen effektlackierungen Download PDF

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Publication number
EP0773840B1
EP0773840B1 EP95925869A EP95925869A EP0773840B1 EP 0773840 B1 EP0773840 B1 EP 0773840B1 EP 95925869 A EP95925869 A EP 95925869A EP 95925869 A EP95925869 A EP 95925869A EP 0773840 B1 EP0773840 B1 EP 0773840B1
Authority
EP
European Patent Office
Prior art keywords
coating
shear
shear rate
mpa
apparent viscosity
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
EP95925869A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0773840A1 (de
Inventor
Heinz TÖPFEL
Ewald Bischoff
Harry Libutzki
Jorge Wellmann
Dieter Herbst
Hans-Joachim Streitberger
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.)
BASF Coatings GmbH
Original Assignee
BASF Coatings GmbH
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 BASF Coatings GmbH filed Critical BASF Coatings GmbH
Publication of EP0773840A1 publication Critical patent/EP0773840A1/de
Application granted granted Critical
Publication of EP0773840B1 publication Critical patent/EP0773840B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B05D5/06—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
    • 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
    • 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
    • B05D5/068—Metallic effect achieved by multilayers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]

Definitions

  • the invention relates to a method for manufacturing and repair of multi-layer effect paints.
  • Pneumatic application methods stand out disadvantageous in that a relatively large Part of the sprayed amount of paint does not cover the substrate reached, which has the consequence that the circulating air in the Spray booth must have high speeds, thus the relatively large amounts of overspray deposited and can be disposed of.
  • the basecoat film is preferably in only one spray cycle, exclusively made by electrostatic spraying.
  • electrostatic spraying the amount is of the sprayed paint material that the substrate achieved considerably larger than with pneumatic application processes.
  • the speed the circulating air in the spray booth is reduced can and that smaller amounts of paint overspray have to be processed and disposed of.
  • all of the platelet-shaped pigments containing platelet-shaped pigments suitable for the serial painting of automobile bodies can be used, provided they have a solids content of 18% by weight and a temperature of 23 ° C. at a shear rate of 1,000 s -1 after a shear time of 6 s an apparent viscosity of 40 to 200, preferably 60 to 150 mPa s, after a shear time of 300 s at a shear rate of 1000 s -1 an apparent viscosity of 40 to 200, preferably 60 to 150 mPa s, at a shear rate of 5 s -1 after a shear time of 10 s an apparent viscosity of 100 to 2000, preferably 200 to 800 mPa s and after a shear time of 300 s at a shear rate of 5 s -1 an apparent viscosity of 100 to 2000, preferably 500 to 1500 mPa s, the measurements carried out at the shear rate of 5 sec
  • rheology aids such as, for example, crosslinked polymer microparticles (cf. for example EP-A-38127), finely divided silica, anionic polyacrylate resins, layered silicates, etc.
  • the person skilled in the art can in principle apply any basecoat suitable for series coating to a viscosity behavior, that meet the above conditions.
  • the basecoats used in stage (1) of the process according to the invention can be either aqueous or non-aqueous.
  • Aqueous basecoats are described, for example, in EP-A-38127 and non-aqueous basecoats are described, for example, in US-A-4,220,679.
  • the method according to the invention is particularly suitable good for making and repairing multilayer Effect coatings with darker shades (e.g. Diamond Black) and for the production and repair of multi-layer effect paints with lighter ones Shades (e.g. silver).
  • darker shades e.g. Diamond Black
  • lighter ones Shades e.g. silver
  • Basecoat layer exclusively by electrostatic Syringes is made.
  • electrostatic Spraying is the amount of paint material sprayed, which reaches the substrate, much larger than with pneumatic application processes. That has as a result that the speed of the circulating air in the Spray booth can be reduced and that lower Amounts of paint overspray worked up and disposed of Need to become. It can also be used to manufacture multi-layer effect painting necessary painting system be significantly reduced if the basecoat layer exclusively by electrostatic Syringes is made.
  • the application of basecoats containing platelet-like pigments electrostatic spraying is good for the person skilled in the art known and therefore does not need any further details here to be explained
  • Spray application process in which the paint drops of the spray jet meet the above-mentioned conditions can, for example, with the help of HVLP (high volume, low pressure) fuel pistols that are commercially available are available.
  • the diameter, the speed and thus the impulse of the Drops of paint in the spray jet essentially depend on the paint flow rate, the amount of atomizing air or Atomizing air pressure, paint viscosity and Nozzle geometry.
  • a reduction in paint flow rate has, for example, a reduction in the paint drop diameter and an increase in speed the paint drops result.
  • An increase in atomizing air pressure also leads to a reduction the paint drop diameter and to an increase the speed of the paint drops.
  • phase Doppler anemometry method is used by W.D. Bachalo and M.J. Houser in OPTICAL ENGINEERING / September / October 1984 / Vol.23 No.5 on pages 583 to 590.
  • the basecoat film thus obtained is after an intermediate drying (10 min, 80 ° C) with a commercially available a polyacrylate resin as a binder and a melamine resin as a clearcoat containing crosslinking agents overcoated (dry film thickness of the clear coat: 50 ⁇ m) and then basecoat and clearcoat 20 Baked at 140 ° C for minutes.
  • half of the painted test board is taped with an adhesive strip and the remaining half is sanded with sandpaper (800). Then the basecoat used for the initial painting is applied with an HVLP spray gun (De Vilbiss GFHV-511, manufacturer: De Vilbiss; cap: air cap No. 152, nozzle EY 7; atomization pressure: 0.4 bar, measured at air cap; spraying distance: 30 cm to Substrate) in a first application (first cloister) sprayed in a dry layer thickness of 6-8 ⁇ m.
  • HVLP spray gun De Vilbiss GFHV-511, manufacturer: De Vilbiss; cap: air cap No. 152, nozzle EY 7; atomization pressure: 0.4 bar, measured at air cap; spraying distance: 30 cm to Substrate
  • the spray jet produced is characterized in that 25% of the drops of paint passing a measuring point located in the center of the spray jet and 300 mm from the nozzle have a diameter which is below 20 ⁇ m and 15% of the drops of paint which pass this measuring point happen, have a diameter that is over 60 microns. In addition, 33% of the drops of paint passing the measuring point have a speed which is below 6 m / s, and 17% of the drops of paint which pass the measuring point have a speed of more than 10 m / s.
  • the impulse of the paint drops that pass the measuring point is 6.8 ⁇ 10 -5 g cm s -1 .
  • the diameter and the speed of the paint drops were determined using the phase Doppler anemometry method.
  • the basecoat film thus obtained is after an intermediate drying (10 min, 80 ° C) with a commercially available a polyacrylate resin as a binder and a Clear varnish containing polyisocyanate as crosslinking agent overcoated (dry film thickness of the clear coat: 45 ⁇ m) and then basecoat and Clear coat baked at 140 ° C for 30 min.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)
  • Adhesives Or Adhesive Processes (AREA)
EP95925869A 1994-07-22 1995-07-13 Verfahren zur herstellung und ausbesserung von mehrschichtigen effektlackierungen Expired - Lifetime EP0773840B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4426039A DE4426039A1 (de) 1994-07-22 1994-07-22 Verfahren zur Herstellung und Ausbesserung von mehrschichtigen Effektlackierungen
DE4426039 1994-07-22
PCT/EP1995/002749 WO1996003221A1 (de) 1994-07-22 1995-07-13 Verfahren zur herstellung und ausbesserung von mehrschichtigen effektlackierungen

Publications (2)

Publication Number Publication Date
EP0773840A1 EP0773840A1 (de) 1997-05-21
EP0773840B1 true EP0773840B1 (de) 1998-09-23

Family

ID=6523917

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95925869A Expired - Lifetime EP0773840B1 (de) 1994-07-22 1995-07-13 Verfahren zur herstellung und ausbesserung von mehrschichtigen effektlackierungen

Country Status (12)

Country Link
US (1) US5820986A (ja)
EP (1) EP0773840B1 (ja)
JP (1) JP2891778B2 (ja)
KR (1) KR100208908B1 (ja)
CN (1) CN1152886A (ja)
AT (1) ATE171399T1 (ja)
CA (1) CA2191879A1 (ja)
DE (2) DE4426039A1 (ja)
DK (1) DK0773840T3 (ja)
ES (1) ES2125029T3 (ja)
TW (1) TW400255B (ja)
WO (1) WO1996003221A1 (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1418133A (zh) * 2000-03-16 2003-05-14 大众汽车股份公司 漆面缺陷的小面积消除方法
DE60110492T2 (de) * 2000-04-17 2006-02-23 E.I. Du Pont De Nemours And Co., Wilmington Verfahren zur Reparaturbeschichtung von Mehrschichtüberzügen auf Substraten
US6777033B2 (en) 2002-03-18 2004-08-17 E. I. Du Pont De Nemours And Company Process for refinishing substrates
US9744559B2 (en) 2014-05-27 2017-08-29 Paul W Harrison High contrast surface marking using nanoparticle materials
CN106423805A (zh) * 2016-11-28 2017-02-22 中信戴卡股份有限公司 一种铝合金表面涂层及形成该涂层的方法
EP3811051A1 (de) * 2018-06-25 2021-04-28 BASF Coatings GmbH Verfahren zur bestimmung der tropfengrössenverteilung während der zerstäubung und darauf basierendes screening-verfahren bei der lackentwicklung
MX2020014212A (es) * 2018-06-25 2021-03-09 Basf Coatings Gmbh Metodo para producir un revestimiento optimizado y un revestimiento que se puede obtener mediante el uso de dicho metodo.

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5814266B2 (ja) * 1975-12-19 1983-03-18 三井東圧化学株式会社 メタリツクチヨウトマクノケイセイホウホウ
US4238387A (en) * 1978-11-20 1980-12-09 E. I. Du Pont De Nemours And Company Rheology control additive for paints
EP0038127B1 (en) * 1980-04-14 1984-10-17 Imperial Chemical Industries Plc Multi-layer coating process involving use of aqueous basecoat composition containing crosslinked polymer microparticles and having a pseudoplastic or thixotropic character
US4477536A (en) * 1982-03-18 1984-10-16 Glasurit America, Inc. Process for preparing a multilayer coating
NL8500475A (nl) * 1985-02-20 1986-09-16 Akzo Nv Thixotrope bekledingssamenstelling.
DE3919028A1 (de) * 1989-06-10 1990-12-13 Hoechst Ag Ueberzugsmasse, verfahren zur herstellung von ueberzuegen und damit beschichtete substrate
JPH0312263A (ja) * 1989-06-12 1991-01-21 Nissan Motor Co Ltd うるし調塗膜の形成方法
US5204401A (en) * 1990-07-13 1993-04-20 Basf Corporation Metallic water borne base coat composition based on acrylic latex resins using acrylic resins derived from vinyl monomers having nonionic and urethane functionality for aluminum storage and a treated hextorie clay for rheology control - water base 9
US5413809A (en) * 1993-07-01 1995-05-09 E. I. Du Pont De Nemours And Company Method for achieving recoat adhesion over a silane topcoat
JP3208022B2 (ja) * 1994-10-21 2001-09-10 本田技研工業株式会社 メタリック塗料の塗装方法

Also Published As

Publication number Publication date
ATE171399T1 (de) 1998-10-15
KR970704525A (ko) 1997-09-06
DE4426039A1 (de) 1996-01-25
JPH09509098A (ja) 1997-09-16
KR100208908B1 (ko) 1999-07-15
JP2891778B2 (ja) 1999-05-17
WO1996003221A1 (de) 1996-02-08
EP0773840A1 (de) 1997-05-21
DK0773840T3 (da) 1999-06-14
CA2191879A1 (en) 1996-02-08
DE59503723D1 (de) 1998-10-29
US5820986A (en) 1998-10-13
TW400255B (en) 2000-08-01
ES2125029T3 (es) 1999-02-16
CN1152886A (zh) 1997-06-25

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