EP1027390A1 - Peinture de finition electriquement conductrice - Google Patents

Peinture de finition electriquement conductrice

Info

Publication number
EP1027390A1
EP1027390A1 EP98956865A EP98956865A EP1027390A1 EP 1027390 A1 EP1027390 A1 EP 1027390A1 EP 98956865 A EP98956865 A EP 98956865A EP 98956865 A EP98956865 A EP 98956865A EP 1027390 A1 EP1027390 A1 EP 1027390A1
Authority
EP
European Patent Office
Prior art keywords
lacquer according
conductive
additives
lacquer
electrically conductive
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.)
Withdrawn
Application number
EP98956865A
Other languages
German (de)
English (en)
Inventor
Karl Herrmann
Wolf-Rüdiger Karl
Klaus Pipplies
Klaus Schulte
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.)
Plastal GmbH
Venator Germany GmbH
Original Assignee
Sachtleben Chemie GmbH
Dynamit Nobel Kunststoff 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
Priority claimed from DE1997148226 external-priority patent/DE19748226A1/de
Priority claimed from DE1998134284 external-priority patent/DE19834284A1/de
Application filed by Sachtleben Chemie GmbH, Dynamit Nobel Kunststoff GmbH filed Critical Sachtleben Chemie GmbH
Publication of EP1027390A1 publication Critical patent/EP1027390A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/24—Electrically-conducting paints

Definitions

  • the present invention relates to polymer-based paints, which are used in particular to coat plastic surfaces.
  • the insulating properties of plastics often have other disadvantages when used. Because of their insulating properties, it is not possible, for example, to paint them easily using the so-called electrostatic coating. This is particularly disadvantageous when insulating plastics are combined with electrically conductive materials and are to be painted electrostatically together in one operation; a process that is quite common in the automotive industry and its suppliers, in which plastic bumpers are connected to metallic body parts, for example.
  • electrostatic painting In order to be able to use the technology of electrostatic painting, however, it was previously necessary to treat the plastic surfaces with a black or dark gray, electrically conductive primer. Plastic surfaces equipped in this way could then be electrostatically painted over with the actual topcoat.
  • the object of the present invention was therefore to provide lacquers which eliminate the disadvantages which occur when lacquering plastic surfaces.
  • Another object of the present invention was to provide topcoats with an antistatic finish in order to be able to dispense with the electrically conductive primer.
  • the coatings of the invention should also meet the requirements with regard to mechanical and optical properties, corrosion protection and weather resistance.
  • additives include conductive carbon blacks, metal powders, conductive coated mica flakes, finely divided surface-treated and -Untreated SnO 2, semiconductor-doped TiO 2, BaSO doped semiconductor and a number of organic additives.
  • sufficient conductive particles are introduced into the lacquer, which form a network of electrically conductive paths in the lacquer matrix, via which electrical charges can flow away in a targeted manner (percolation theory).
  • the amount of conductive particles in the polymer matrix of the lacquer required for the antistatic finish and the resulting conductivity of the overall system is determined by the percolation theory.
  • the combination with suitable other, non-conductive fillers / pigments is provided.
  • This measure makes use of the so-called extender effect without any loss of conductivity in the overall system.
  • This extender effect makes it possible to reduce the amount of conductive additives required per se.
  • a surface resistance of 10 2 to 10 9 ohms that meets the criterion for antistatic coatings usually forms when pigmented with the conductive additives and / or the non-conductive fillers / pigments from 5 - 35% PVC (pigment volume concentration).
  • a suitable lacquer can thus be formulated according to the invention for any decorative design.
  • controlled flocculation with thermodynamically less favorable solvents or with suitable additives known to the person skilled in the art can be provided.
  • a lower degree of filling leads to improvements in all of the above criteria, while maintaining the desired antistatic property.
  • the TiO 2 particles to be used can also have an inorganic doping.
  • the doping of the TiO 2 particles with aluminum oxide or zirconium oxide advantageously changes the weather resistance of the paint according to the invention.
  • an organic aftertreatment can be provided according to the invention.
  • the on water-dilutable or solvent-containing binders such.
  • Varnishes should preferably be equipped with coloring pigments (e.g. TiO 2 , organic and inorganic colored pigments), with effect pigments (e.g. pearlescent pigments) or other fillers such as. B. BaSO.
  • coloring pigments e.g. TiO 2 , organic and inorganic colored pigments
  • effect pigments e.g. pearlescent pigments
  • B. BaSO fillers
  • the selection criteria depend on the properties required in the later application.
  • the curing of the coating systems is determined by the choice of resin and the additives used. Curing by UV or EB radiation can also be carried out successfully with a suitable choice of additives.
  • additives which are usually used can also be used in the formulations on which the invention is based.
  • the paints according to the invention can be produced by processes known per se.
  • the solution according to the invention can eliminate one operation in the treatment of plastic surfaces, which on the one hand saves considerable costs and on the other hand eliminates sources of error in the process. Furthermore, the solution according to the invention also relieves the burden on the environment, since the elimination of the lead primer (electrostatic primer) eliminates the solvents normally used.
  • silver, green and red metallic lacquers based on cellulose acetobutyrate / polyester / melamine resin were each antistatically equipped with a transparent, electrically conductive BaSO4.
  • the formulation for the silver metallic lacquer composed according to the invention may be mentioned by way of example: Cellulose acetobutyrate (15%) 32.0% by weight
  • Electrically conductive BaSO 4 is known per se from EP-A-0 459 552. It basically consists of BaSO 4 particles, which are encased by a layer of SnO 2 doped with Sb 2 O 3 . Sacon P 401, for example, can be used.
  • the plastic surfaces treated with these metallic lacquers according to the invention were initially examined purely visually. There were no significant differences to the plastic surfaces treated with known metallic paints. The paints were then measured with a spectrophotometer at D65 / 10 0 . Here, too, there were only slight differences in the colorimetric data. The maximum Delt E values were 1.30.
  • lacquer according to the invention is the following formulation of a light gray, electrically conductive basecoat based on polyester / melamine resin.
  • Another advantageous embodiment of the invention provides the so-called controlled flocculation.
  • this controlled flocculation can be generated.
  • the antistatic property of the lacquer according to the invention is not lost here either.
  • tests have been carried out in polyester, acrylate and epoxy resin systems.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

Peinture à base de polymère qui contient, outre les ingrédients classiques d'une peinture, des additifs conducteurs appropriés conférant à cette peinture des propriétés antistatiques.
EP98956865A 1997-10-31 1998-10-22 Peinture de finition electriquement conductrice Withdrawn EP1027390A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE1997148226 DE19748226A1 (de) 1997-10-31 1997-10-31 Elektrisch leitfähige Lacke
DE19748226 1997-10-31
DE1998134284 DE19834284A1 (de) 1998-07-30 1998-07-30 Elektrisch leitfähige Decklacke
DE19834284 1998-07-30
PCT/EP1998/006724 WO1999023178A1 (fr) 1997-10-31 1998-10-22 Peinture de finition electriquement conductrice

Publications (1)

Publication Number Publication Date
EP1027390A1 true EP1027390A1 (fr) 2000-08-16

Family

ID=26041249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98956865A Withdrawn EP1027390A1 (fr) 1997-10-31 1998-10-22 Peinture de finition electriquement conductrice

Country Status (3)

Country Link
US (1) US20060202172A1 (fr)
EP (1) EP1027390A1 (fr)
WO (1) WO1999023178A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19939199B4 (de) * 1999-08-18 2005-12-15 Sachtleben Chemie Gmbh Verwendung von Lacken auf Polymerbasis
JP6630696B2 (ja) * 2017-03-15 2020-01-15 日本特殊塗料株式会社 車両用帯電防止組成物、車両、及び車両の製造方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1065680A (en) * 1964-12-10 1967-04-19 Ici Ltd Improvements in or relating to coated films
JPS5785866A (en) * 1980-11-18 1982-05-28 Mitsubishi Metal Corp Antistatic transparent paint
US4429077A (en) * 1980-12-19 1984-01-31 Ciba-Geigy Corporation Process for curing stoving lacquers
DE3613060A1 (de) * 1986-04-18 1987-10-22 Herberts Gmbh Ueberzugsmittel mit hoher elektrischer leitfaehigkeit und dessen verwendung zur herstellung von ueberzuegen
JPH0618911B2 (ja) * 1987-09-25 1994-03-16 ポリプラスチックス株式会社 静電塗装プラスチックス成形品の製造方法
JPH02123178A (ja) * 1988-10-31 1990-05-10 Nippon Petrochem Co Ltd 導電性塗料
US5269970A (en) * 1990-02-26 1993-12-14 Th. Goldschmidt Ag Electrically conductive tin-IV-oxide and method for production thereof
DE4017044A1 (de) * 1990-05-26 1991-11-28 Metallgesellschaft Ag Elektrisch leitfaehiges bariumsulfat und verfahren zu seiner herstellung
US6019833A (en) * 1990-10-22 2000-02-01 Ppg Industries Ohio, Inc. Light colored conductive coating and method and composition for application thereof
JP3444919B2 (ja) * 1992-04-18 2003-09-08 メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフトング 導電性顔料
ES2096796T3 (es) * 1992-04-25 1997-03-16 Merck Patent Gmbh Pigmento conductor de la electricidad.
DE19511012A1 (de) * 1994-04-06 1995-10-12 Merck Patent Gmbh Oberflächenmodifiziertes, leitfähiges Pigment
US5631311A (en) * 1994-08-18 1997-05-20 E. I. Du Pont De Nemours And Company Transparent static dissipative formulations for coatings

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9923178A1 *

Also Published As

Publication number Publication date
US20060202172A1 (en) 2006-09-14
WO1999023178A1 (fr) 1999-05-14

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