Effetti innovativi e funzionali nel coating
Transcript of Effetti innovativi e funzionali nel coating
Effetti innovativi e funzionali nel coating
Merck Effect Pigments in evereday life
Politecnico di Torino – 13 Maggio 2014
Stefano Corrado - Account Manager Coatings Merck Spa Milano
Introduction to „Pigments“
Substances which are used as colorants and are insoluble
in the application medium.
DIN 55943: Insoluble substances with corrosion inhibiting or
electromagnetic properties are also “pigments“
Colorants which are soluble in the application medium are called
“dyes“
Inorganic color pigments: e.g.
Titanium dioxide, Carbon black, Iron oxides, Metallics, Mica pigments
Organic color pigments:
Azo pigments
Polycyclic pigments (e.g. phthalocyanine, perylene)
Functional pigments: e.g.
Zinc phosphate (anti-corrosive)
Antimony-doped tin dioxide (conductive pigment)
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Introduction to „ Effect “
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pigment classes
absorption
pigments
metal effect
pigments
pearlescent
pigments
Specific color by light absorption
Hue/color does not change with angle
Color comes from the surface
Metallic gloss by light reflection
Brightness strongly depends on angle
Specific color, gloss and color flop due to
interference effects
Hue/color may have a strong dependence on
angle
Colors comes from the depth
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pearlescent pigments
transparent substrate with laminar structure
layer with a high refractive index interference color
transmitted part of the light
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Interference effect
40-60nm 60-80nm 80-100nm 100-140nm
120-160nm
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Different particle size
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Different particle size
Particle size distributions
M < 15 µm low gloss, very good hiding power
F 5 - 25 µm silky gloss, good hiding power
N 10 - 40 µm pearlescent, hiding
S 10 - 130 µm shimmering, low hiding power
L 40 - 200 µm glittering, non-hiding
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Advantages of Effect Pigments versus Extended Optical Films
easy to incorporate in all relevant application systems
many possibilities to blend effect pigments with other pigments
textural effects caused by single particles
different particle sizes vary optical and functional effect
easy to manufacture with acceptable costs
environmentally save to produce
flexibility to equip surfaces with the desired effects by e.g. spraying,
printing, extruding
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Mica Metal oxide
Al2O3 Metal oxide Substrate is produced
synthetically
exact control of the
substrate properties
Metal oxide
SiO2
Substrate is produced
synthetically
exact control of the
substrate properties
Natural raw material mica
limited control of the
substrate properties
Substrate is produced
synthetically
exact control of the
substrate properties
Overview of Pearlescent Pigments
Metal oxide
Borosilicate
SiO2
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Merck’s effect toolbox
natural mica substrate
optimized
natural mica substrate Al oxide substrate silica substrate glass flake substrate
high chroma crystal effect
pigments
effect pigments designed for
coatings pearl luster effect pigments multicolor effect pigments high sparkle effect pigments
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Luminous metal effect pigments
meoxal ®
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Coatings market applications
Automotive OEM Coatings
Automotive Repair Coatings
Powder Coatings (architectural panels, window and door frames,furniture etc.)
Plastic Coatings (for telecomunication and phono articles, automotive parts, sport utilities)
Industrial Coating (metal forniture, cooking ware, domestic appliances etc.)
Coil Coating (architectural building)
Dispersion paints (decorative paints for indoor and outdoor on buildings)
Leather Coatings (shoe, handbag, interior design and automotive interior)
Wood Coatings (paint for wood indoor and outdoor, kitchen design and forniture)
Artist paint (paint for professional and hobby artist)
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Cross-section through a Weather Resistant Pearl Lustre Pigment
weather resistance
metal oxide
mica
• Additional coating for external applications : Iriodin – Xirallic –
Colorstream
• Florida Test – Humidity test - UV Light - TiO2 photo-activity
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Basic Rules for Formulating
Pearl pigments can be incorporated in all coating systems.
Use the most transparent formulation possible:
the less opacity = the better is the effect, = lower is the concentration
Opaque formulations = higher pigment levels. An excess of light scattering destroys
pearlescence.
Avoid grinding and milling of pearlescent pigments:
If mechanical stress on the pigments is too high, the pigment particles might break or the
metal oxide layer might be removed from the mica platelet, resulting in loss of luster and
color change.
Pearlescent pigments disperse well without grinding due to theirlarge particle size and
the virtual absence of agglomeration.
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Mica/Metal oxide pigments have a density of approx. 3g/cm3 so
they have a tendency to settle.
Easy re-dispersion (by simple stirring) is the most important
requirement (no formation of a hard layer/cake)
Solutions
Continual movement of the paint system during processing
Use of suitable additives for easy re-dispersion, which have no negative effect on the pearl lustre.
Sedimentation
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Orientation: Influence of the paint system on the appearance
wet film
dry film with low shrinking
dry film with high shrinking
parallel orientation = good effect
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in the transportation market
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in the transportation market
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in the transportation market
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in the transportation market
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Merck’s effect toolbox
natural mica substrate
optimized
natural mica substrate Al oxide substrate silica substrate glass flake substrate
high chroma crystal effect
pigments
effect pigments designed for
coatings pearl luster effect pigments multicolor effect pigments high sparkle effect pigments
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Luminous metal effect pigments
meoxal ®
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Improvement of color saturation with the “Merck Color Space” Concept
“Merck Color Space” is a concept based on color metric calculations for a
given number of pigments that each possess at least one interference
layer. The calculations help to determine their optimal hue angle for the
largest possible gamut.
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color space ®
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in the transportation market ®
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in the transportation market ®
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in the transportation market ®
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in the transportation market ®
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in the transportation market ®
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in the transportation market
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in the transportation market
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in the transportation market
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in the transportation market
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in the transportation market
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in the transportation market
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in the transportation market
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in the transportation market
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in the transportation market
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in the transportation market
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in the transportation market
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in the transportation market
Coatings 41
in the transportation market
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in the transportation market ®
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meoxal
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in the transportation market ®
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meoxal
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stunning architecture
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applications
powder
coating
dispersion
paint
coil coating wood coating
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in dispersion paint
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in dispersion paint
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in powder coating
Frankfurt am Main, Germany / Main Tower
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in powder coating
Esslingent, Germany / Festo Building
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in powder coating
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Darmstadt, Germany / Merck Pigments Building
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in powder coating
Barcelona, Spain / Torres Fira / Arch. Toyo Ito
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in coil coating
Scottsdale, Arizona, USA / Appaloosa Library / DWL Architects
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in coil coating
Singen, Germany / School Cafetaria / Riede Architects
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in coil coating
Bucine, Italy / Visualplex Company
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61 Ananti Club, Seoul, South Korea / Ken Min Architects
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in coil coating
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in coil coating
Chongquing Zhong Yu Aiduhui - China
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in wood coating
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consumer & lifestyle markets
consumer
goods
household
appliances
sports goods fashion
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for household appliances
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for household appliances
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for household appliances
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for consumer goods
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for consumer goods
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for plastic coated consumer goods
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for plastic coated consumer goods
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for leather coated sports goods
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for sports goods ®
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for sports goods ®
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meoxal ®
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for sports goods
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for leather fashion
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for leather fashion
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for leather fashion ®
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meoxal ®
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www.merck4coatings.com
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Merck SpA Via XI Febbraio 99 - 20090 Vimodrone MI
Account Managers Coatings Performance Materials | Pigments & Cosmetics |
Business Field Decorative Materials
Stefano Corrado
mobile: +39 3357549664
email: [email protected]
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