smart combinations of organic and inorganic pigments from ... · langelsheim / november 2012 slide...

Smart Combinations of organic and inorganic Pigments

-from colour to function

Langelsheim / November 2012Dr. Thomas Sowade, Heubach GmbH

/ 39Langelsheim / November 2012

Agenda

Comparison organic / inorganic Pigments

Brilliance / Chroma

Oil Absorption / Pigmentation Level / Hiding Power

Weathering stability

Tinting strength

Chemical Resistance

Smart Combinations

Chroma Enhancement

Cost efficient formulations

Increased weathering stability

From Colour to Function


Comparisoninorganic / organic Pigments


Brilliance / Chroma

Colour Space Organic / Inorganic Pigments

TiO2

MLY108304

MLY113901 MLY115101MLY115401

MLR311205

MLR325402

Vanadur 1010

HD 150 plusHD 3R

0,0

20,0

40,0

60,0

80,0

100,0

25,0 45,0 65,0 85,0 105,0

hue

Chr

oma

Organic pigments have a higher Chroma compared to inorganic Pigments


Oil Absorption / Pigmentation Level / Hiding Power

Product Colour

Index

Oil Absorption

[ml/100g]

Pigmentation Level*

(Pigment Paste) [%]

TiO2 P.W. 6 18 73

HEUCODUR 150plus P.Y. 53 16 67

HEUCODUR 3R P.Br. 24 20 70

Monolite Yellow 113901 P.Y. 139 52 n.d.

Monolite Yellow 115101 P.Y. 151 52 n.d.

Monolite Yellow 115401 P.Y. 154 55 32

Monolite Red 311205 P.R. 112 51 45

VANADUR 1010 P.Y. 184 24 65


Monolite Red 325402 P.R. 254 59 35

* Based

on C.I.

Inorganic pigments have a lower oil absorption and therefore can be used in higher concentrations (e.g. to achieve hiding power)


Weathering Stability

Florida weathering results HEUCODUR 3R

0,0

1,0

2,0

3,0

4,0

5,0

6 months 12 months 18 months 24 months

full shade

1:1 reduction

1:5 reduction

DE


Weathering Stability

MONOLITE Yellow 113901 vs. Competition - Full shade

0,0

1,0

2,0

3,0

4,0

5,0

1 year 2 years

DE

MONOLITE Yellow 113901

Competition 1

Competition 2

MONOLITE Yellow 113901 vs. Competition - 1/25 SD

0,0

1,0

2,0

3,0

4,0

5,0

1 year 2 years

DE

MONOLITE Yellow 113901

Competition 1

Competition 2

Inorganic pigments have a very good weathering resistance


Tinting strength

Pigment Ratio to achieve appr. 1/25 SD

PY 53HEUCODUR 150plus

1: 1,3 TiO2

PY 151Monolite Yellow 115101

1: 29,5 TiO2

Organic pigments have a superior tinting strength


Chemical Resistance

Product Colour

Index

Alkaline

Resistance

Acid

Resistance

Solvent

Resistance

TiO2 P.W. 6 n.d. n.d.

5

5

4*

5

5

Monolite Yellow 115101 P.Y. 151 5* 5 5

Monolite Yellow 115401 P.Y. 154 5 5 4-5

5

5

n.d.

HEUCODUR 150plus P.Y. 53 5 5

HEUCODUR 3R P.Br. 24 5 5


Monolite Red 311205 P.R. 112 4 3

VANADUR 1010 P.Y. 184 5 5

Monolite Yellow 108304 P.Y. 83 5 4-5

Monolite Red 325402 P.R. 254 5 5

Inorganic Pigments have a superior chemical resistance. Some of them can

even be used in alkaline media like concrete


Smart Combinationsinorganic / organic Pigments


Chroma Enhancement

HEUCODUR® Yellow 3R / Pigment Red 112

TiO2 / Pigment Red 254

TiO2 / Pigment Red 112

HEUCODUR® Yellow 3R / Pigment Red 254


Chroma Enhancement

Chroma Enhancement with HEUCODUR 3R

HEUCODUR 3R / PR 254

TiO2 / PR 254

HEUCODUR 3R / PR 112

TiO2 / PR 112

40

42

44

46

48

50

52

54

56

58

60

0 5 10 15 20 25 30 35 40

hue

Chr

oma

Combining organic Pigments with HEUCODUR 3R instead of TiO2 results

in a significantly improved Chroma


Chroma Enhancement

HEUCODUR® Plus Yellow 150 / Pigment Yellow 74 TiO2 / Pigment Yellow 74

HEUCODUR® Plus Yellow 150 / Pigment Yellow 83 TiO2 / Pigment Yellow 83

HEUCODUR® Plus Yellow 150 / Pigment Orange 36 TiO2 / Pigment Orange 36


Chroma Enhancement

Chroma Enhancement with HEUCODUR 3R

HEUCODUR 150plus / PO 36

TiO2 / PO 36

HEUCODUR 150plus / PY 83

TiO2 / PY 83

HEUCODUR 150plus / PY 74

TiO2 / PY 74

20

30

40

50

60

70

80

0 20 40 60 80 100

hue

Chro

ma

Combining organic Pigments with HEUCODUR 150plus instead of TiO2 results

in a significantly improved Chroma


Cost efficient Formulations – RAL shade examples

RAL 1003

TiO2 - 26,8

PY 83 6,4 10,40

PY 53 78,2 -

PO 62 0,5 -

PY 151 10,7 54,70

PBr 24 1,9 -

PY 42 2,3 8,10

Cost 0,55 1

RAL 1007

TiO2 - 6,8

PY 83 29,3 40

PY 53 60 -

PO 62 - -

PY 151 - 51,7

PBr 24 8,6 -

PY 42 2,1 1,5

Cost 0,47 1

Cost efficient formulations using inorganic coloured pigments PY 53 and

PBr24 and reducing the amount of organic pigment

RAL 3013

TiO2 5,8 16,7

PY 83 7,9 33,4

PY 53 16,1 -

PR 254 22,3 26,9

PBr 24 30,6 -

PR 101 17,3 23

Cost 0,71 1


Increased weathering Stability

after 2000 h Xenon test

DE

4P P.Y. 531P P.Y.138

9P TiO21P P.Y. 138

Bismuthvanadate

3P TiO21P P.Y. 138

0

1

2

3

4

5

accelerated weathering in a water borne acrylic resin

Improved weathering stability over TiO2 containing formulations


From Colour to Function


0,00

0,20

0,40

0,60

0,80

1,00

250

500

750

1000

1250

1500

1750

2000

2250

2500

0 m N.N. (sea level) wavelength [nm]

Rel

. In

tensi

ty

UVUV NIR-radiationNIR-radiation

Solar emission spectrum of the sun

From Colour to Function – Solar Emission Spectrum


Radiation

Absorption

(Reflection)

Interaction of (pigmented) surfaces with Sun-Radiation

From Colour to Function – Interaction of Pigments

Scattering

Transmission

diffuse Reflection


0,00

0,25

0,50

0,75

1,00

400 650 900 1150 1400 1650 1900 2150 2400

wavelength [nm]

rel.

ref

lect

ion

White substrate: 79% Reflection

Black substrate: 5% Reflection

From Colour to Function – Reflectance

Reflectance of different substrates

White substrate reflects while black substrate (Carbon Black) absorbs


From Colour to Function – Reflectance of Organic Pigments

Reflectance of organic Pigment (e.g. PO 73)

0,00

0,25

0,50

0,75

1,00

400 650 900 1150 1400 1650 1900 2150 2400

wavelength [nm]

rel.

ref

lect

ion

PO 73, visually hiding, on white substrate: 55% Reflection

PO 73, visually hiding, on black substrate: 44% Reflection

organic Pigments, although hiding in visible, are (semi)-transparent for NIR-

Radiation


From Colour to Function – Reflectance of Inorganic Pigments

Reflectance of Inorganic Pigment PBr 24 and Organic Pigment PO 73

0,00

0,25

0,50

0,75

1,00

400 650 900 1150 1400 1650 1900 2150 2400

wavelength [nm]

rel.

ref

lect

ion

PBr 24 & PO 73, visually hiding, on white substrate: 52% Reflection

PBr24 & PO 73, visually hiding, on black substrate: 49% Reflection

Significantly less difference on white an black substrate when mixing PO 73 with inorganic PBr 24Organic Pigment PO 73 is much less reflecting than inorganic PBr 24


From Colour to function

Reflectance of Inorganic and Organic Pigments

0,00

0,25

0,50

0,75

1,00

400 650 900 1150 1400 1650 1900 2150 2400

wavelength [nm]

rel.

ref

lect

ion

TiO2

Carbon black

HEUCODUR 150plus & PG 36

HEUCODUR 150plus

green organic pigment PG 36 can be combined with inorganic PY 53 to reflectNIR-Radiation


0,00

0,20

0,40

0,60

0,80

1,0025

0

500

750

1000

1250

1500

1750

2000

2250

2500

0 m N.N. (sea level) wavelength [nm]

Rel

. In

tensi

ty

UVUV NIR-radiationNIR-radiation

~50% of total energy in NIR (near infrared radiation)

Solar emission spectrum of the sun



(NIR)-Radiation

Absorption

Emission(Radiation und convection)

Heat flux

Absorption of (NIR)-Radiation



TSR – Spectra of different Pigments (20% Pigmentation in Alkyd/Melamine)

Pigment Characteristic: Total Solar Reflectance

0

10

20

30

40

50

60

70

80

90

100

300 800 1300 1800 2300

Wavelength [nm]

Ref

lect

ance

[%]

Titaniumdioxide; TSR 85%

Chromium Iron Oxide P.Br. 29 (1); TSR 21%

Chrome Iron Nickel Black Spinel P.Bk.30;TSR 9%

Carbon Black; TSR 5%



heat build-up of different pigments until equilibrium stage(20% Pigmentation in Alkyd/Melamine) according to ASTM D4803

max. max. ΔΔTT20 20 °°CC

Paint characteristic: heat build-up

25,0

30,0

35,0

40,0

45,0

50,0

55,0

60,0

65,0

0 10 20 30 40 50 60

Irradiation time [min]

Tem

pera

ture

[°C

]

Titaniumdioxide; max 43°C

P.Br. 29 (1); max 49°C

P.Bk. 30; max 55 °C

Carbon Black; max 63°C



ecological contribution of NIR-reflecting Pigments

Interior Heat management by reduced heat flux

(reduced energy consumption for cooling)

Increased lifetime by reduced thermal binder degradation

(Arrhenius-Equation )

(exponential increase of degradation rate in relation to temperature)

Increased lifetime by reduced thermomechanical stress



Coil Coating

Wood Coating

Automotive Refinish

Composite Thermal Insulation

Leather

etc…



Applications-

Coil Coating


Aim: Heat Management – Cool Roofs - Guidelines

USA

Energy StarCRRC (Cool Roof Rating Council) / CRRC-1 Standard

LEED (Leadership in Environmental & Energy Design)

USA / Kanada

Green Globes

Singapur

Singapore Environment Council (Green Label)

Europa

Cool Roofs Europe



Carbon BlackTSR 5%

Carbon BlackTSR 5%

Carbon BlackTSR 5%

Carbon BlackTSR 5%

PBk 30TSR 10%PBk 30

TSR 10%

Increasing Surface temperature

PBr 29TSR 22%PBr 29

TSR 22%

IR-reflecting PigmentsIR-reflecting Pigments

Effect of NIR-reflecting pigments visualized by infrared camera



Potential for energy savings

depending onClimatic conditions

Isolation

Colour (TSR before / after)

Cooling/heating energy sources

etc.

reported in literature2 – 40 % (average 20 %)Haberl, J., and S. Cho. 2004. Literature Review of Uncertainty of Analysis Methods (Cool Roofs), Report to the Texas Commission on Environmental Quality. Energy Systems Laboratory, Texas A&M University, College Station, TX.

10 – 69% (Verview on Literatur in “Reducing Urban Heat Islands: Compendium of Strategies-Cool Roofs”))

7 – 15 % (average indication in CRRC / USA)5 – 54 % (Cool Roofs Europe; Case studies in Crete, Athens, Sicily, Poitiers and London) (Michele Zinzi, Carlo Romeo, Cool Roofs, EIE/07/475/SI2.499428; Report on the five case studies and analysis of the results, 2010)



Applications-

Automotive Refinish


Dark greyDark grey Light greyLight grey

commercialnon-NIR

commercialnon-NIR

NIRNIR commercialnon-NIR

commercialnon-NIR

NIRNIR

Dry film thickness = 40-50 µmDry film thickness = 40-50 µm



25,0

30,0

35,0

40,0

45,0

50,0

55,0

60,0

65,0

0 5 10 15 20 25 30 35 40

time of exposure [min.]

tem

pera

ture

[°C

]

non-NIR primer dark grey

non-NIR primer light grey

NIR primer dark grey

NIR primer light grey

primer white

Heat build-up of different automotive primers based on NIR-reflective and

non-reflective Pigments



metalmetal

Wash primerWash primer

PrimerPrimer

BasecoatBasecoat

ClearcoatClearcoat

Primer Red basecoat Blue basecoat

white

non-NIR light grey

non-NIR dark grey

NIR light grey

NIR dark grey

TSR [%] 35 20 30 12 10 18 15

max Temperature [°C] 50.0 56.6 51.3 59.6 61.6 52.3 52.8



In Multi-Layer-Systems the efficiency of the total system

may depend upon the efficiency of each single layer (a

possible NIR-transparency of single layers needs to be

considered)

By choosing a suitable Multi-Layer-System it becomes

possible to create surfaces with high brilliance combined

with high NIR-reflectance (smart combinations: organic,

NIR-(semi)transparent Pigments in topcoat; NIR-reflecting

Pigments in Primer)



Thank You

for your

Attention !!!

smart combinations of organic and inorganic pigments from ... · langelsheim / november 2012 slide...

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