WO1999050360A1 - Method for colour composition of a powder lacquer, the powder lacquer obtained therewith and the lacquer layer obtained therewith - Google Patents

Method for colour composition of a powder lacquer, the powder lacquer obtained therewith and the lacquer layer obtained therewith Download PDF

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Publication number
WO1999050360A1
WO1999050360A1 PCT/EP1998/001941 EP9801941W WO9950360A1 WO 1999050360 A1 WO1999050360 A1 WO 1999050360A1 EP 9801941 W EP9801941 W EP 9801941W WO 9950360 A1 WO9950360 A1 WO 9950360A1
Authority
WO
WIPO (PCT)
Prior art keywords
lacquer
powder
powder lacquer
colour
obtained therewith
Prior art date
Application number
PCT/EP1998/001941
Other languages
French (fr)
Inventor
Jacobus Lambertus Van Merksteijn
Original Assignee
Vms Holding Ag
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 to NL1004000A priority Critical patent/NL1004000C2/en
Application filed by Vms Holding Ag filed Critical Vms Holding Ag
Priority to PCT/EP1998/001941 priority patent/WO1999050360A1/en
Publication of WO1999050360A1 publication Critical patent/WO1999050360A1/en

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
    • B05D5/061—Special surface effect
    • 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
    • C09D5/03—Powdery paints
    • C09D5/032—Powdery paints characterised by a special effect of the produced film, e.g. wrinkle, pearlescence, matt finish
    • 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
    • C09D5/29—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for multicolour effects

Definitions

  • the invention relates to a method for colour composition of a powder lacquer.
  • the invention also relates to a powder lacquer for coating a surface using electrostatic spraying, wherein the powder lacquer is composed of powder lacquer particles, and to a lacquer layer manufactured using such a powder lacquer.
  • powder lacquer is sprayed through for instance a wire cage at 60-100 V at the earthed object for spraying.
  • the powder lacquer particles are charged in the electrical field and move in the direction of the field strength gradient to the object.
  • the advantage is that the rear side thereof is also coated and that paint losses are small. It is also possible to guide the powder lacquer to a rotating bell-jar or disc which itself has already been brought to said potential.
  • the part of the powder lacquer which does not deposit on the object, which is generally limited, can be recovered in a separate installation.
  • the powder lacquer is commercially obtainable in a number of standard colours, and for differing colours there has to be consultation with the supplier of the powder lacquer who can then develop a new powder lacquer in the desired colour.
  • the present invention has for its object to increase the possibilities of applying colour variations in powder lacquers and lacquer layers to be manufactured therewith.
  • the invention also has for its object to provide a simple method for colour composition of the powder lacquer.
  • the invention provides for this purpose a method for colour composition of a powder lacquer, which method comprises the following successive steps of: - combining at least two lacquer powders of mutually differing colour, and 2
  • the invention also provides a powder lacquer for coating a surface using electrostatic spraying, wherein the powder lacquer is composed of powder lacquer particles, which powder lacquer particles are mixed in statistically homogeneous manner in at least two mutually differing colours by performing the above specified method according to the invention.
  • the invention also provides a lacquer layer manufactured using such a powder lacquer, in which lacquer layer the colour differences of the original individual powder lacquer particles can still be discerned.
  • the present invention will be further elucidated with reference to the following figure.
  • the figure shows a top view of an enlarged part of a lacquer layer 1 according to the invention.
  • the lacquer layer 1 is built up of powder lacquer particles which have fused into the homogeneous lacquer layer 1 by enamelling.
  • the homoge- neous lacquer layer 1 is built up of small areas 2,3,4 which each result from a melted powder lacquer layer particle.
  • the colours of the respective areas 2,3,4 of lacquer layer 1 are different because the powder lacquer particles from which areas 2,3,4 are created had differ- ent colours.
  • lacquer layer 1 is built up of powder lacquer particles of three different colours. This can be inferred from the three different hatchings with which the respective areas 2,3,4 are marked.

Landscapes

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

Abstract

The invention relates to a method for colour composition of a powder lacquer, which method comprises the following successive steps of: combining at least two lacquer powders of mutually differing colour, and subsequently mixing the individual lacquer powders to form a statistically homogeneous mixture.

Description

METHOD FOR COLOUR COMPOSITION OF A POWDER LACQUER,
THE POWDER LACQUER OBTAINED THEREWITH AND
THE LACQUER LAYER OBTAINED THEREWITH
The invention relates to a method for colour composition of a powder lacquer. The invention also relates to a powder lacquer for coating a surface using electrostatic spraying, wherein the powder lacquer is composed of powder lacquer particles, and to a lacquer layer manufactured using such a powder lacquer.
In powder coating according to a pneumatic method powder lacquer is sprayed through for instance a wire cage at 60-100 V at the earthed object for spraying. The powder lacquer particles are charged in the electrical field and move in the direction of the field strength gradient to the object. The advantage is that the rear side thereof is also coated and that paint losses are small. It is also possible to guide the powder lacquer to a rotating bell-jar or disc which itself has already been brought to said potential. The part of the powder lacquer which does not deposit on the object, which is generally limited, can be recovered in a separate installation.
The powder lacquer is commercially obtainable in a number of standard colours, and for differing colours there has to be consultation with the supplier of the powder lacquer who can then develop a new powder lacquer in the desired colour.
The present invention has for its object to increase the possibilities of applying colour variations in powder lacquers and lacquer layers to be manufactured therewith.
The invention also has for its object to provide a simple method for colour composition of the powder lacquer. The invention provides for this purpose a method for colour composition of a powder lacquer, which method comprises the following successive steps of: - combining at least two lacquer powders of mutually differing colour, and 2
- subsequently mixing the individual lacquer powders to form a statistically homogeneous mixture.
The invention also provides a powder lacquer for coating a surface using electrostatic spraying, wherein the powder lacquer is composed of powder lacquer particles, which powder lacquer particles are mixed in statistically homogeneous manner in at least two mutually differing colours by performing the above specified method according to the invention. Finally, the invention also provides a lacquer layer manufactured using such a powder lacquer, in which lacquer layer the colour differences of the original individual powder lacquer particles can still be discerned. By mixing together powder lacquers of varying co- lours a mixed colour results, the colour of which depends on the colours of the starting powder lacquers as well as on the ratios in which they are mixed. Experimental mixtures have thus been manufactured from powder lacquers in the basic colours yellow, green and red in the respec- tive ratios 1:1:1, 2:1:1, 1:2:1 and 1:1:2. These four different mixtures were then sprayed electrostatically onto test plates which were finally enamelled. The final result consisted of four homogeneous lacquer layers of varying colours. From a distance, i.e. more than half a metre, the lacquer layer has an even appearance. From a short distance, i.e. less than a distance of half a metre, the "pixels" of the original powder lacquer particles are visible. Since these powder lacquer particles are fused to a homogeneous layer, the appearance of the lacquer layer from a short distance can be compared to a TV screen or a half-tone colour photo. In particular applications this appearance can provide precisely the desired aesthetic effect, while in other applications, for instance in industrial constructions, it is not in any way conspicuous and the lacquer layer appears to be completely homogeneous .
An important advantage of this manner of colour composition of a powder lacquer is that colour variants can be manufactured, for instance for individual clients, without consultation with a supplier of the powder lac- 3 quer. Another advantage is that in this way remnants of powder lacquer can be processed into a lacquer layer with a colour which is deemed less important.
The present invention will be further elucidated with reference to the following figure. The figure shows a top view of an enlarged part of a lacquer layer 1 according to the invention. The lacquer layer 1 is built up of powder lacquer particles which have fused into the homogeneous lacquer layer 1 by enamelling. The homoge- neous lacquer layer 1 is built up of small areas 2,3,4 which each result from a melted powder lacquer layer particle. The colours of the respective areas 2,3,4 of lacquer layer 1 are different because the powder lacquer particles from which areas 2,3,4 are created had differ- ent colours. Areas 2,3,4 are thus fused together to form a homogeneous lacquer layer 1, but from the colour of an area 2,3,4 it is still possible to make out the colour of the powder lacquer granule from which the relevant area 2,3,4 was created. As shown in this figure, lacquer layer 1 is built up of powder lacquer particles of three different colours. This can be inferred from the three different hatchings with which the respective areas 2,3,4 are marked.
*****

Claims

1. Method for colour composition of a powder lacquer, which method comprises the following successive steps of:
- combining at least two lacquer powders of mutually differing colour, and
- subsequently mixing the individual lacquer powders to form a statistically homogeneous mixture.
2. Powder lacquer for coating a surface using electrostatic spraying, wherein the powder lacquer is com- posed of powder lacquer particles, which powder lacquer particles are mixed in statistically homogeneous manner in at least two mutually differing colours by performing the method as claimed in claim 1.
3. Lacquer layer manufactured from a powder lacquer as claimed in claim 2 which is electrostatically sprayed and subsequently enamelled into a homogeneous layer, in which homogeneous lacquer layer the colour differences of the original individual powder lacquer particles can still be discerned.
*****
PCT/EP1998/001941 1996-09-11 1998-03-31 Method for colour composition of a powder lacquer, the powder lacquer obtained therewith and the lacquer layer obtained therewith WO1999050360A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL1004000A NL1004000C2 (en) 1996-09-11 1996-09-11 Method for composing a powder lacquer, powder lacquer and lacquer layer by color.
PCT/EP1998/001941 WO1999050360A1 (en) 1996-09-11 1998-03-31 Method for colour composition of a powder lacquer, the powder lacquer obtained therewith and the lacquer layer obtained therewith

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1004000A NL1004000C2 (en) 1996-09-11 1996-09-11 Method for composing a powder lacquer, powder lacquer and lacquer layer by color.
PCT/EP1998/001941 WO1999050360A1 (en) 1996-09-11 1998-03-31 Method for colour composition of a powder lacquer, the powder lacquer obtained therewith and the lacquer layer obtained therewith

Publications (1)

Publication Number Publication Date
WO1999050360A1 true WO1999050360A1 (en) 1999-10-07

Family

ID=26070309

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/001941 WO1999050360A1 (en) 1996-09-11 1998-03-31 Method for colour composition of a powder lacquer, the powder lacquer obtained therewith and the lacquer layer obtained therewith

Country Status (2)

Country Link
NL (1) NL1004000C2 (en)
WO (1) WO1999050360A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2113537A1 (en) 2008-04-28 2009-11-04 Dupont Powder Coatings France S.A.S. Powder coating composition
US8034853B2 (en) 2009-04-28 2011-10-11 E.I. Du Pont De Nemours And Company Powder coating composition

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0459048A1 (en) * 1990-06-01 1991-12-04 Courtaulds Coatings (Holdings) Limited Coloured powder coating compositions
WO1991018951A1 (en) * 1990-06-01 1991-12-12 Courtaulds Coatings (Holdings) Limited Powder coating compositions
WO1995019399A1 (en) * 1993-10-22 1995-07-20 Arsonsisi S.P.A. Thermosetting powdered paints and two-coat painting process for thermosetting powdered paints

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0459048A1 (en) * 1990-06-01 1991-12-04 Courtaulds Coatings (Holdings) Limited Coloured powder coating compositions
WO1991018951A1 (en) * 1990-06-01 1991-12-12 Courtaulds Coatings (Holdings) Limited Powder coating compositions
WO1995019399A1 (en) * 1993-10-22 1995-07-20 Arsonsisi S.P.A. Thermosetting powdered paints and two-coat painting process for thermosetting powdered paints

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2113537A1 (en) 2008-04-28 2009-11-04 Dupont Powder Coatings France S.A.S. Powder coating composition
US8034853B2 (en) 2009-04-28 2011-10-11 E.I. Du Pont De Nemours And Company Powder coating composition

Also Published As

Publication number Publication date
NL1004000C2 (en) 1998-03-12

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