1. High Performance Pigments – Selecting the best pigment for different applications.
Presentation By:
Jadel Baptista
Technical Director
WCS
Jadel Baptista

2. Formulators Have Been Looking for Organic Shade Bright Yellow Pigments with Superior Lightfastness and Opacity
Main used blends: Industrial: Diarylide Yellow PY 83 + Benzimidazolone Yellow PY 151 / PY 154 Architectural: Hansa Yellow PY 65 + Hansa Yellow PY 74 / PY 97 Rationale: Industrial Pigment PY 83 (Red shade yellow) – Opaque, mid level lightfastness (Mass: 6-7 / Tint: 6) Pigment PY 151(Green shade yellow) – Opaque, good lightfastness (Mass: 8 / Tint: 7-8) Pigment PY 154 (Green shade yellow) – Transparent, excellent lightfastness (Mass: 8 / Tint: 8) Architectural Pigment PY 65 (Red shade yellow) – Transparent, good lightfastness (Mass: 7-8 / Tint: 7) Pigment PY 74 (Green shade yellow) – Opaque, mid level lightfastness (Mass: 7-8 / Tint: 6) Pigment PY 97 (Green shade yellow) – Transparent, good lightfastness (Mass: 7-8 / Tint: 7)
WCS
Jadel Baptista

3. INDUSTRIAL COATINGS PY 151 PY 154 PY 83 (Op) PY 83 (Trans)
Good opacity and lightfastness
Excellent lightfastness
Excellent opacity Mid level lightfastness
Poor opacity
Mid level lightfastness
Result of blend: Dull masstone and poor tint lightfastness
WCS
Jadel Baptista

4. ARCHITECTURAL COATINGS
PY 65
PY 97
PY 74
Good opacity
Mid level lightfastness
Poor opacity
Good lightfastness
Poor opacity
Good lightfastness
WCS
Jadel Baptista

5. How can we get a red shade yellow with excellent lightfastness and acceptable opacity?
High Opacity PY 110
PY 83(Op)
PY 110 (Op)
PY110 (Trans)
PY 65
WCS
Jadel Baptista

6. PY 110 – ISOINDOLINONE YELLOW
Tetrachloro structure – Very stable molecule
Excellent brightness and tinting strength
Good “in can” storage in dispersions containing aluminum pigment
Used in automotive finishes – Metallic (transparent) and solid shade
Used in general industrial, printing inks, and plastics.
Good heat stability – 570o F (Plastics- HDPE) and 390o F (Coatings – Alkyd melamine)
FDA approved (Section )
WCS
Jadel Baptista

7. PY 110 – ISOINDOLINONE YELLOW BENCHMARKING – COMPETITIVE PIGMENTS
STRENGTH – CIEL*a*b*, Integrated method, D65 Illuminant, 10 Deg. Observer.
CONTRAST RATIO – Opacity difference over black (STD) vs over white – The lower the difference the higher the opacity.
LIGHTFASTNESS (XENON-ARC) – ASTM G155 – Tint and Masstone, WB Acrylic PU, Energy: 0.35W/m2, Total Time: 2000 hours. Checked 500 hours intervals - Masstone DE variations were found due to the specimens locations during xenon arc exposure.
SIX(6) PIGMENTS TESTED: A – F
PIGMENT “A” IS THE SUBJECT PIGMENT (STD)
WCS
Jadel Baptista

8. PY 110 – ISOINDOLINONE YELLOW BENCHMARKING – COMPETITIVE PIGMENTS
LIGHTFASTNESS
MASS
TINT
IDENTIFICATION
STR
OPACITY DE F
109
43.7 (1)
5.41 (4)
0.65 (3)
93 (2) E
102
36.7 (4)
2.91 (6)
0.52 (5)
97 (5) D
104
40.2 (2)
7.14 (1)
0.80 (1)
92 (1) C
114
37.3 (3)
6.03 (3)
0.56 (4)
95 (3) B
103
34.8 (5)
6.72 (2)
0.75 (2)
98(6) A
100
32.7 (6)
4.79 (5)
0.49 (6)
96 (4)
WCS
Jadel Baptista

9. PY 110 – ISOINDOLINONE YELLOW BENCHMARKING COMPETITIVE PIGMENTS Opacity and lightfastness considered most important attributes
LIGHTFASTNESS
MASS
TINT
IDENTIFICATION
STR
OPACITY DE F
109
43.7 (1)
5.41 (4)
0.65 (3)
93 (2) E
102
36.7 (4)
2.91 (6)
0.52 (5)
97 (5) D
104
40.2 (2)
7.14 (1)
0.80 (1)
92 (1) C
114
37.3 (3)
6.03 (3)
0.56 (4)
95 (3) B
103
34.8 (5)
6.72 (2)
0.75 (2)
98(6) A
100
32.7 (6)
4.79 (5)
0.49 (6)
96 (4)
F = ( ) / 4 = 2.25
E= ( ) / 4 = 5.00
D= ( ) / 4 = 1.25
C= ( ) / 4 = 3.25
B= ( ) / 4 = 3.75
A = ( ) / 4 = 5.25 A E B C F D
1 WORSE
6 BEST
WCS
Jadel Baptista

10. CONCLUSIONS AND OBSERVATIONS
Results showed correlation between STR and Contrast Ratio – The higher the opacity the lower the strength.
PY 110 has similar opacity to PY 65 and PY 154, with better lightfastness properties.
The combination of PY 110 and PY 151 is the best possible to achieve good lightfastness and opacity.
PY 110 has very good brightness in masstone.
Due to the PY 110 being redder than PY65 and PY83, it can be used in lower quantity when blended with green shade yellow. Providing room for better opacity.
Good selection of PY 110 source is recommended before starting a project. Wide variations in opacity and lightfastness were found between different suppliers.
PY 110 is still considered a high cost pigment, however for applications that require excellent lightfastness properties, the PY 110 is certainly an option.
WCS
Jadel Baptista

11. Thank You!
WCS
Jadel Baptista