SNOBRITE®
SNOBRITE®
SNOBRITE® white extender pigments are produced from air floated intermediate kaolins. With a plate-like crystal structure and high aspect ratio, this material provides good reinforcing properties, increased hardness and stiffness, and improved resistance to abrasion and tear. Its tendency to slowly build viscosity makes SNOBRITE® a cost-effective formulating tool to enhance performance without adversely affecting production rates. SNOWBRITE® additions also improve critical working properties, including extrusion, calendering, mold release, and handling.
In molded and extruded rubber, SNOWBRITE® can be loaded to relatively high levels and still produce pliable compounds with good durometer values. Unlike finer particle clays, this material will not absorb accelerators or adversely affect the cure rate. This is especially important in precision parts where shrinkage and extrusion properties need to be balanced with mechanical strength, hardness, and resistance to tear. The high loading and low shrinkage characteristics of SNOBRITE® are valued in a wide range of synthetic and natural rubber products, including roofing, footwear, wire and cable jacketing, hose, mill rods, commercial and residential roll matting, soft and novelty rubber goods, and polyester gunks.
Selectively mined to maximize whiteness and GEB values, this material is particularly effective in systems where color is critical. Combined with light scattering properties which mimic more expensive opacifiers, SNOBRITE® offers functional performance in a wide range of adhesives, sealants, caulking compounds, and mastics. In alkyd and water-based coatings, the combination of particle shape and particle size distribution operates to improve film properties, including surface finish, permeability, scrub resistance, and hiding power.
Grades Available
| SNOBRITE® 75 | SNOBRITE® 68 | SNOBRITE® 60 |
Properties
| ASTM E-11 | Microns | 75 | 68 | 60 | Method | |
|---|---|---|---|---|---|---|
| Typical Mean % Retained on Individual Sieves | 200 | 75 μ | < 0.25 | < 0.25 | < 0.30 | |
| Typical Mean % Retained on Individual Sieves | 325 | 45 μ | < 0.50 | < 0.30 | < 0.70 | |
| Subsieve Analysis % Passing | < 20 | 99 | 99 | 99 | ||
| < 10 | 96 | 94 | 93 | |||
| < 5 | 91 | 86 | 80 | |||
| < 2 | 81 | 68 | 60 | |||
| < 1 | 73 | 56 | 46 | |||
| < 0.5 | 58 | 40 | 34 | |||
| Median Particle Size (μ) | 0.5 | 0.9 | 1.2 | Sedigraph | ||
| Surface Area (m2/g) | 24 | 21 | 17 | ASTM D-1993 | ||
| Oil Absorption (g/100g) | 42 | 40 | 35 | ASTM D-281 | ||
| Brightness | 80 | 80 | 78 | GEB | ||
| Lab Value L | 94.0 | 94.0 | 94.0 | Spectrometric | ||
| Lab Value a | 0.2 | 0.3 | 0.2 | |||
| Lab Value b | 5.0 | 5.5 | 5.0 | |||
| pH (in solution) | 6.0 - 8.0 | 6.0 - 8.0 | 6.0 - 8.0 | AFS 113-87-S | ||
| Moisture Content | < 1.0 | < 1.0 | < 1.0 | AFS C-566 |
*Typical mean values. These do not represent a specification.
SNOBRITE® 75 | SNOBRITE® 68 | SNOBRITE® 60
