Synthetic Plastic Pigment. Rohm and Haas Company,China

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1 Synthetic Plastic Pigment Rohm and Haas Company,China

2 Contents Solid bead plastic Pigment&Hollow Sphere Pigment Gloss Development Performance Properties Applications HP-1055 Greater China Technical Center 2

3 Solid Pigment Properties Particle Size range ( nm) Highly uniform particle size Non-film forming polystyrene particle Tg C Thermoplastic emulsion polymer Dry Gravity 1.05 Refractive Index 1.59 Particle Charge - Anionic Greater China Technical Center 3

4 Hollow Sphere Pigment Properties Wet state: water-filled spheres Dry state: air-filled spheres Particle Size range ( nm) Highly uniform particle size Non-film forming polystyrene particle Tg C Greater China Technical Center 4

5 Hollow Sphere Pigment Properties (cont) Thermoplastic emulsion polymer Dry Gravity Refractive Index 1.59 Particle Charge - Anionic Greater China Technical Center 5

6 SEM of Synthetic Pigment Greater China Technical Center 6

7 HSP Freeze Fracture Greater China Technical Center 7

8 Actual vs Effective Solids 50% total solids 27% total solids Greater China Technical Center 8

9 HSP Effective Solids and Coating Rheology Encapsulated water is trapped until coating begins to dry Wet coating runnability (visco-elasticity) behaves as if trapped water is solid material Therefore; HSP Effective solids > Actual (dry) solids Effective coating solids determines rheology / runnability characteristics Greater China Technical Center 9

10 HSP Effective Solids Chart Actual vs Effective Solids HP Effective Solids % Parts HP Note: Effective Solids will be formulation dependant. This plot assumes 14 parts binder. If formulation varies from this by more than 4 parts recalculation is recommended Actual Solids % Greater China Technical Center 10

11 Opacity & Brightness Clay Ropaque Plastic Titanium Calcium HSP Pigment Dioxide Carbonate

12 Morphology HP-1055 Polymeric Shell 0.82 micron Water Drying Water diffuses through the shell Air 1.0 micron Greater China Technical Center 12

13 Light Scattering of HSP Polymeric shell n=1.5 Incident light Air n=1.0 Scattered light Greater China Technical Center 13

14 Interactions of Light with Coatings Interactions of Light with Coatings Greater China Technical Center 14

15 Mechanism of Gloss Development Thermoplastic deformation at surface (calendering) Increased smoothness Increased specular reflection of light Dependent on synthetic pigment size and % void Greater China Technical Center 15

16 Gloss Development on Calendering 70 Sheet Gloss All Mineral = 80 Clay / 20 CaCO3 SHEET GLOSS (75deg) Pre- Calender Post Calender Groundwood Calender 1 nip 10 0 All Mineral 5 HSP 10 HSP Greater China Technical Center 16

17 Typical Pigment Density Comparisons Pigment Density g/cc Clay 2.8 Carbonate 2.7 TiO Solid Bead Synthetic 1.05 Hollow Sphere Synthetic Greater China Technical Center 17

18 HSP Bulking Capability vs. Other Coating Pigments Hollow Sphere Solid Sphere Clay CaCO3 TiO2 Volume / Unit Weight Greater China Technical Center 18

19 HSP in Supercalendered Paper Coating Greater China Technical Center 19

20 Applications LWC, ULWC high bulk, light weight low show through (opacity contribution) mild calendering (bulk, stiffness, opacity) Rotogravure grades HSP improves smoothness and compressibility. Greater China Technical Center 20

21 Applications (cont) Premium Papers To development sheet and print gloss and uniform surface printing performance improvement in ink gloss and sharper print dots Greater China Technical Center 21

22 Applications (cont) Coated Paperboard Improvements in gloss,bulk,printability, and smoothness. Increase coatings opacity and brightness. high bulk / stiffness retention reduction in calendering intensity increased speed possible Greater China Technical Center 22

23 Applications (cont) Thermal Paper Hollow Sphere Pigment provides unique benefits to thermal imaging applications in three areas : thermal insulating provide excellent top coat holdout contribute high bulk & smoothness Greater China Technical Center 23

24 Applications (cont) Conventional Size Press low density pigments reduce settling in low viscosity formulations high bulk for maximum fiber coverage, improved print performance good light scattering ease of calendering Greater China Technical Center 24

25 Applications (cont) HSP can also be used effectively to improve performance in other applications, including Non-impact printing,wet-end and etc. HSPs are the tool that been designed to improve the performance of coatings by increasing gloss, opacity, brightness, smoothness, bulk, printability, or productivity. Whatever the need, HSP can help optimize coating properties and achieve more value added performance in paper and paperboard products. Greater China Technical Center 25

26 ROPAQUE HP % AIR FILLED VOID 0.82 Micron 1.0 Micron SHELL THICKNESS 0.09 Micron Greater China Technical Center 26

PaperCon 2011 Page 2196

PaperCon 2011 Page 2196 "Coating & print performance of biobased latex in European graphic papers" Johann Oberndorfer, Director of Research, Myllykoski Corporation, Germany and Phil Greenall, Sales Director Europe, and Steven