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C.E.D. P ROCESS M INERALS, I NC. The Functional Filler of Choice C.E.D. Process Minerals Technology Review January, 2013.

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Presentation on theme: "C.E.D. P ROCESS M INERALS, I NC. The Functional Filler of Choice C.E.D. Process Minerals Technology Review January, 2013."— Presentation transcript:

1 C.E.D. P ROCESS M INERALS, I NC. The Functional Filler of Choice C.E.D. Process Minerals Technology Review January, 2013

2 C.E.D. P ROCESS M INERALS, I nc.  A HIGH TEMPERATURE POLYMORPH OF SILICA.  OCCURS RARELY IN NATURE.  MANUFACTURES THROUGH A PROPRIATARY, SOLID STATE HIGH TEMPERATURE PROCESS TO CREATE A USEABLE FORM.  CED CRISTOLBRITE AND GORESIL CRISTOBALITE POSSESS A COMBINATION OF PROPERTIES AND CHARACTERISTICS UNIQUELY SUITED FOR APPLICATION AS FUNCTIONAL FILLERS IN ELASTOMERS.

3 C.E.D. P ROCESS M INERALS, I nc. C-1 Cristobalite – processed to contain a minimum of 96% cristobalite. The remainder can be tridymite, quartz or amorphous silica. Product is milled to sizes from 30 mesh to 400 mesh GoreSil – manufactured from C-1 cristobalite. Processed to micron sizes and classified to control particle size distribution. Available in sizes from 10µm to 2µm. CristolBrite – Engineered chemistry to provide high brightness and whiteness. Higher pH than C1, C-2 and GoreSil. C-2 cristobalite – processed to contain 75% cristobalite. The remainder can be quartz and tridymite. Same chemical composition as C-1 but lower cristobalite content. C-65 cristobalite – engineered to have 65% cristobalite with the majority of the additional phase as quartz. Designed for abrasive application.

4 C.E.D. P ROCESS M INERALS, I nc.  Very high solar reflectance and thermal emittance  Extremely bright and white  Jointed surface texture  Enhances mechanical bonding with organic polymers  Hydrophobic  Low Moisture Content  Low Oil Absorption  High hardness  High purity silicate mineral  Available in particle sizes from 0.7mm to 2µm

5 C.E.D. P ROCESS M INERALS, I nc. Vital to the performance and effectiveness of cool roof products is solar reflectance and thermal transport characteristics combined to minimize heat gain. CED CristolBrite & GoreSil Solar Reflectance = 0.93 Thermal Emittance = 0.88 Solar Reflectance Index =119

6 C.E.D. P ROCESS M INERALS, I nc. The high temperature transformation of quartz to the silica polymorph, cristobalite, is accompanied by a significant increase in whiteness and brightness. The index of refraction changes from quartz(1.55) to cristobalite(1.48). CED CristolBrite and GoreSil is further modified to optimize brightness. Hunter Brightness: L* = 96 a = 0.1 b = 0.5

7 C.E.D. P ROCESS M INERALS, I nc. CristolBrite 500xQuartz 500x

8 C.E.D. P ROCESS M INERALS, I nc. The contrast in surface texture between cristobalite and quartz is illustrated in the pictures on the previous page. Cristobalite has a rounded morphology while quartz fractures exposing acute angles and flat faces. Cristobalite has a low index of refraction and no color tint. Those attributes, coupled with the jointed surface texture – Cristobalite is an excellent titanium dioxide extender

9 C.E.D. P ROCESS M INERALS, I nc.  Hydrophobic and Hydrophilic are frequently used descriptors of surfaces. A surface is hydrophobic if it tends not to absorb water or be wetted by water. A surface is hydrophilic if it tends to absorb water or is wetted by water. More particularly, the terms describe the interaction of the boundary layer with liquid or vapor water.  The surface of most mineral fillers terminate with metal hydroxyl groups and are usually hydrophilic. These surfaces tend to attract moisture and are less compatible with organic polymers.  The surface of CristolBrite and GoreSil terminate with siloxane groups. These surfaces are hydrophobic. The siloxane layer promotes adhesion and increase in mechanical properties in organic polymer systems.

10 C.E.D. P ROCESS M INERALS, I nc. The graph presents the effect of various loading levels of GoreSil on the resistance to scratch in a 100% solids UV polyurethane. Even loading levels as low as 4% have demonstrated significant improvement in scratch resistance

11 C.E.D. P ROCESS M INERALS, I nc. Physical Properties Chemical analysis, Wt% Specific Gravity 2.33 SiO ₂ 99.7 Hardness (Mohs) 6.5 Al ₂ O ₃ 0.09 Refractive Index 1.48 Fe ₂ O ₃ 0.04 pH CaO 0.02 CristolBrite 8.5 TiO ₂ 0.01 GoreSil 6.5

12 C.E.D. P ROCESS M INERALS, I nc. CristolBrite GoreSil KRS BET Surface Area m²/gm d d d

13 C.E.D. P ROCESS M INERALS, I nc.  Relatively high Solar Reflectance Index  Hydrophobic  Improves resistance to scratching and dirt build up  Non reactive to acids and bases

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