8. heubach gmbh.pdf

Optimal Pigmentation Strategies for

Near Infrared Reflecting Pigments

Speaker: Dr. Wolfgang Wald

Director Marketing/Business Development Asia Pacific

Author: Dr. Lutz Frischmann (Head of BU Inorganic Colored Pigments)

Masterbatch 2011

Singapore March 2011

/ 27Masterbatch 2011 June 2011

Why a dedicated pigmentation strategy for

Near Infrared Reflecting Pigments?

Why a dedicated pigmentation strategy for

Near Infrared Reflecting Pigments?


P.O. 36 + TiO2P.O. 36 + TiO2 P.O. 36 + P.Br.24P.O. 36 + P.Br.24 P.Y. 83 + TiO2P.Y. 83 + TiO2 P.Y. 83 + P.Y.53P.Y. 83 + P.Y.53

Tmax = 60°CTmax = 60°CTmax = 62°CTmax = 62°C


1. Introduction1.1. It‘s not only the visible that counts!1.2. Solar terrestrial radiation1.3. Light – pigment Interaction

2. Chromatic Strategies2.1. Color space and chroma enhancement2.2. Case in point:

- Pigment Orange 36- Pigment Yellow 83- Pigment Red 254- Olive- Turquoise

2.3. Improved weather resistance2.4. Improved mechanical performance and life-cycle

3. Achromatic Strategies3.1. Heat build-up of white panels3.2. Heat build-up of black panels3.3. Same in the visible but different in NIR!3.4. TSR values of suitable pigments

1. Introduction1.1. It‘s not only the visible that counts!1.2. Solar terrestrial radiation1.3. Light – pigment Interaction

2. Chromatic Strategies2.1. Color space and chroma enhancement2.2. Case in point:

- Pigment Orange 36- Pigment Yellow 83- Pigment Red 254- Olive- Turquoise

2.3. Improved weather resistance2.4. Improved mechanical performance and life-cycle

3. Achromatic Strategies3.1. Heat build-up of white panels3.2. Heat build-up of black panels3.3. Same in the visible but different in NIR!3.4. TSR values of suitable pigments


NIRNIR

UVUV

VisibleVisible

Perfo

rmance

Perfo

rmance

Controls coloristicControls coloristic

Controls outdoordurability

Controls outdoordurability

Controls heat buildand thermal stress

Controls heat buildand thermal stress

Introduction: It‘s not only the visible that counts!


UV-light effectsUV-light effectsNear Infrared light effectsNear Infrared light effects

Visible light effectsVisible light effects Optimal pigmentation

Optimal pigmentation

Introduction: It‘s not only the visible that counts!


Energy distribution:

5% UV45% Visible50% Near Infrared

Energy distribution:

5% UV45% Visible50% Near Infrared

Wavelength [nm]

Relative inte

nsity

Solar terrestrial emission spectrum AM 1.5 direct and diffuseSolar terrestrial emission spectrum AM 1.5 direct and diffuse

Introduction: Light – pigment interaction

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ART qqq ++=1

qR

qT

qA



solar terrestrialemission spectrum

solar terrestrialemission spectrum

titanium dioxidetitanium dioxide

P.Br. 24P.Br. 24

P.Br. 24 + P.R. 254blend

P.Br. 24 + P.R. 254blend


Electromagnetic reflection spectra of different pigmentscompared to the incident solar emission

Electromagnetic reflection spectra of different pigmentscompared to the incident solar emission

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400 600 800 1000 1200 1400 1600 1800 2000 2200 2400

Wavelength [nm]

Re

lati

ve

In

ten

sit

y


Chromatic

Strategies

Chromatic

Strategies


P.Y.83+P.Br.24

P.Y.83+P.W.6

P.Y.83+P.Y.53

70,0

74,0

78,0

82,0

68 70 72 74 76

Hue

Chro

ma

yellowblue

red green

P.Y.83+P.Br.24

P.Y.83+P.W.6

P.Y.83+P.Y.53

70,0

74,0

78,0

82,0

68 70 72 74 76

Hue

Chro

ma

yellowblue

red green

Chroma enhancement

Chromatic strategies: Case study – P.Y. 83

TSR=61%TSR=61%

TSR=58%TSR=58%

TSR=58%TSR=58%


P.O.36+P.W.6

P.O.36+P.Y.53 P.O.36+P.Br.24

50,0

54,0

58,0

62,0

40 42 44 46 48 50

Hue

Ch

rom

a

yellowblue

red green

P.O.36+P.W.6

P.O.36+P.Y.53 P.O.36+P.Br.24

50,0

54,0

58,0

62,0

40 42 44 46 48 50

Hue

Ch

rom

a

yellowblue

red green

Chroma enhancement

Chromatic strategies: Case study – P.O. 36

TSR=58%TSR=58%

TSR=56%TSR=56%

TSR=55%TSR=55%


Chromatic strategies: Color space and chroma enhancement

Areas where a chroma

enhancement is feasible

Areas where a chroma

enhancement is feasible


P.R.254+P.W.6

P.R.254+P.Y.53

P.R.254+P.Br.24

57,5

58

58,5

59

59,5

60

60,5

15 20 25 30 35

Hue Angle

Ch

rom

ati

cit

y C

*

Chromatic strategies: Case study – P.R. 254

Chrom

a enhancem

ent


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Wavelength [nm]

Refl

ecta

nce

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Wavelength [nm]

Refl

ecta

nce

TSR = 52%TSR = 52%

TSR = 28%TSR = 28%

Formulation 2:P.Y.184+P.V.122

Formulation 2:P.Y.184+P.V.122

Formulation 1:P.Y.184+P.Y.42+P.Y.53+P.G.7

Formulation 1:P.Y.184+P.Y.42+P.Y.53+P.G.7

Chromatic strategies: Case study - olive


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Wavelength [nm]

Refl

ecta

nce

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Wavelength [nm]

Refl

ecta

nce

TSR = 37%TSR = 37%

TSR = 35%TSR = 35%

Formulation 1:P.Y.184+P.B.28

Formulation 1:P.Y.184+P.B.28

Formulation 2:P.Y.184+P.B.15:3+P.W.6

Formulation 2:P.Y.184+P.B.15:3+P.W.6

Chromatic strategies: Case study - turquoise


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Wavelength [nm]

Refl

ecta

nce [

%]

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Wavelength [nm]

Refl

ecta

nce [

%]

P.B. 28P.B. 28

Chromatic strategies: Case study - turquoise

UV visibleNIR

solar terrestrial radiationsolar terrestrial radiation

maximum coverage!maximum coverage!


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2,50

500 750 1000 1250 1500

Weathering Time [h]

dE

* C

IEPR254 3pph in white PMMA

PBr24/PR254 3pph in white PMMA

Chromatic strategies: Improved weathering resistance

Accelerated weathering of P.R. 254 in white PMMA with and without the addition of P.Br.24

Accelerated weathering of P.R. 254 in white PMMA with and without the addition of P.Br.24


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0,50

1,00

1,50

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2,50

500 700 900 1100 1300 1500 1700 1900

Weathering Time [h]

DE

* C

IE

encapsulated PY184

PY53 / PY184

PY 53

Chromatic strategies: Improved weathering resistance

Accelerated weathering of encapsulated bismuth vanadate with and withoutthe addition of P.Y.53

Accelerated weathering of encapsulated bismuth vanadate with and withoutthe addition of P.Y.53


Why could a pronounced temperature difference be detrimental?Why could a pronounced temperature difference be detrimental?

temperatu

re

P.R. 254 + P.Br. 24P.R. 254 + P.Br. 24

P.R. 254P.R. 254

WARPING!

Chromatic strategies: Improved mechanical performance and life-cycle


Achromatic

Strategies

Achromatic

Strategies


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Wavelength [nm]

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fle

cta

nc

e

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Wavelength [nm]

Re

fle

cta

nc

e

titanium dioxidetitanium dioxide

P.G. 17P.G. 17

carbon blackcarbon black


25,0

30,0

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55,0

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Time of exposure [min.]

Tem

pera

ture

[°C

]

ridgid PVC non pigmented

PVC conaitning 0.5pph titanium dioxide

PVC containing 1pph titanium dioxide




Achromatic strategies: Heat build-up of white PVC panels

TiO

2conte

nt

TiO

2conte

nt


25,0

35,0

45,0

55,0

65,0

75,0

85,0

0 5 10 15 20 25 30

Time of exposure [min.]

Tem

pera

ture

[°C

]

rigid PVC non pigmented

PVC containing 2pph carbon black batch

PVC containing 0.5pph carbon black batch

PVC containing 5pph carbon black batch

Achromatic strategies: Heat build-up of black PVC panels

Carbonblack

conte

nt

Carbonblack

conte

nt


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Wavelength [nm]

Refl

ecta

nce

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Wavelength [nm]

Refl

ecta

nce

L*=49.5L*=49.5

L*=62.7L*=62.7

L*=78.0L*=78.0

TSR=14% T=72°CTSR=14% T=72°C

TSR=21% T=63°CTSR=21% T=63°CTSR=23% T=74°CTSR=23% T=74°C

TSR=34% T=64°CTSR=34% T=64°C

TSR=41% T=73°CTSR=41% T=73°C

TSR=54% T=58°CTSR=54% T=58°C

Achromatic strategies: Same performance in the visible but different in NIR


222410TSR [%] in

typical matrix

273114TSR [%] matrix

independent

P.G.17P.Br.35P.Bk.30

Complex Inorganic Colored Pigments and corresponding TSR values

qualified for NIR reflective achromatic non-white applications

Complex Inorganic Colored Pigments and corresponding TSR values

qualified for NIR reflective achromatic non-white applications

Achromatic strategies: TSR values of suitable pigments


Thank you very much for your attention!

Thank you very much for your attention!

8. heubach gmbh.pdf

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