This is a presentation that examines the nature of effect pigments and how they can be used in plastic applications

1. Presented by Doreen Becker Technical Marketing Manager BASF Effect Pigments for Plastics Effect Pigments in Plastics

4. Pigment structure Mica Mica TiO 2 or other metal oxides With optional absorption colorant layer Substrates Mica Borosilicate Al 2 O 3 SiO 2 Graphite Others? 50 nm TiO 2 50 nm TiO 2 500 nm Mica

5. Metal oxide coated mica pigment Metal oxide coated mica O O O O O M M M M >700  C O O O O O O H H H H H H M M M

6. Oxide thickness determines interference color TiO 2 TiO 2 Mica TiO 2 TiO 2

7. Titanium dioxide coated mica by reflectance microscopy Gold Red Violet Blue Green

8. Absorption color depends on oxide color and thickness Mica Bronze Fe 2 O 3 Fe 2 O 3 Mica Russet Fe 2 O 3 Fe 2 O 3

9. Iron oxide coated mica by reflectance microscopy Bronze Russet

10. Mica versus metallic pigments Reflectance of a pearlescent and metallic flake pigment in a transparent resin Pearlescent pigment transparent platelets Metallic flake pigment opaque platelets