This is a hydrated amorphous synthetic Calcium Silicate. Due to its amorphous nature it is safer to use than natural crystalline forms. It also has an entirely different range of properties compared to natural forms, i.e, higher surface area, oil absorption and lower particle size and bulk density.
Sodium Silicate and Calcium Sulphate are reacted together under precisely controlled conditions to give a slurry of Calcium Silicate and Sodium Sulphate in solution. By stringent control of parameters such as temperature, pH, electrolyte concentration, agitation and reaction time, Silicate of required structure and surface characteristics is produced.
The slurry is then filtered and washed with water to remove sodium sulphate. The filter cake is subsequently dried and then milled to the required particle size distribution. Finally the silicate is collected, deaerated, and packed at a controlled bulk density.
TYPICAL PHYSIO-CHEMICAL PROPERTIES | |||
Property | Unit | Value | |
Surface area (BET) | m²/gm | 200-225 | |
Average Particle Size | Micron | 2.8 | |
pH(2% acqueous solution) | -- | 9.5-10.5 | |
Moisture loss on drying at 105°C( 2 hours) | % | 6.5 | |
lgnition loss at 900°C | % max. | 8.0 | |
Water Absorption | % | 300-440 | |
Bulk Density* | gm/cc | 0.07-0.12 | |
Whiteness | % | 95-98 | |
Refractive Index | -- | 1.47 | |
Specific Gravity | -- | 2.1 | |
Silica (SiO2) | % | 78.5 | |
Calcium (CaO) | % | 19.2 | |
Chlorides | % | Traces | |
Sulphate | % | Traces | |
Lead (pb) | ppm max. | 5 | |
Arsenic (As) | ppm max. | 2 |
*At the time of packing.
Adhesives, battery seprators, brake linings, paint primers, paper, plasticized PVC, plastisols, polishes, printing inks, sealants and mastics, tabletting and pelletising, textiles and thermal insulation.
All specifications given here are only indicative, there are several application specific grades under each category, please write to us for exact specifications.
MLA Group of Industries, 111/230, Harsh Nagar, Kanpur-208012 (INDIA) Phone: +91-512-2555292, +91-9336116592
E-mail: md@mlagroup.com