VANSIL® W-20 Wollastonite
- CAS Number
- 13983-17-0
- EC Number
- 237-772-5
- Chemical Name
- Calcium Metasilicate, Pumice
VANSIL® W-20 Wollastonite is a relatively coarse (1 Hegman fineness) low aspect ratio grade of wollastonite that can be used as a general purpose extender pigment where ultra-fineness is not required such as texture paints and block fillers. The naturally high pH of wollastonite helps to buffer latex paints and coatings, which contributes to improved corrosion resistance and weathering. This also extends in-can stability and prolongs the lifetime of the coating.
Properties
- Physical Form
- Powder
- Solid
Identification
- CASE Ingredients Features
- Corrosion ResistanceExcellent WeatherabilityGood ToughnessHigh PerformanceImproves AdhesionIn-Can Stability
- CASE Ingredients Functions
- Extender
Product families
- Fillers & Extenders
- Mortar & Gypsum Additives
Other characteristics
- Brand
- VANSIL
- End Uses
- Latex, Powder Coating
- Features
Corrosion Resistance, Excellent Weatherability, Good Toughness, High Performance, Improves Adhesion, In-Can Stability
- Functions
- Extender, Filler
- Usage
Functional filler in adhesives, abrasives, ceramics, elastomers, insulating materials, paint, plastics, resins, sealants, and wallboards.
- Coating Type
- Latex
- Powder Coating
- Storage Note
Due to the agglomeration of VANSIL W during prolonged storage, more than 6 months inventory is not recommended.
- Technology
- CASE Ingredients
- Industrial Additives & Materials
- Background
VANSIL W-20 is a relatively coarse grade with 2.5% retained on 325 mesh sieve. It will disperse to 0 to 1 Hegman fineness at three pounds per gallon, thereby providing some degree of film roughness where desired.
- Chemical Inventories
- AICS (Australia)
- DSL (Canada)
- ECL (Korea)
- EINECS (EU)
- ENCS (Japan)
- IECSC (China)
- ISHL (Japan)
- KECI (Korea)
- Industrial Additives Functions
- Filler
Technical data
Table 1 of 2
12 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Dry Brightness | min. 80 | — | T-954 |
| Fineness (Retained on 325 mesh) | max. 3.0 | % | T-944 |
| Density (At 25°C) | 2.9 3 | Mg/m³ | — |
| Hegman Fineness (3lbs/gal) | 0.5 | — | — |
| Moisture Content | 0.5 | % | — |
| pH Value (10% SIurry) | 9.8 | — | — |
| Oil Absorption (Rub Out) | 20.0 | — | — |
| Volume Displacement | 24.2 | lbs./gal | — |
| Particle Size Distribution (Horiba LA-300, D10) | 2.5 | — | — |
| Particle Size Distribution (Horiba LA-300, D50) | 15.6 | — | — |
| Particle Size Distribution (Horiba LA-300, D90) | 43.6 | — | — |
| Particle Size Distribution (Horiba LA-300, D95) | 56.7 | — | — |
Table 2 of 2
8 rows| Characteristic | Value | Unit |
|---|---|---|
| Calcium Oxide | 44.9 | % |
| Silicon Dioxide | 51.3 | % |
| Aluminum Oxide | 0.9 | % |
| Magnesium Oxide | 1.6 | % |
| Iron Oxide | max. 0.2 | % |
| Sodium Oxide | max. 0.1 | % |
| Manganese Oxide | max. 0.1 | % |
| Ignition Loss (1000°C) | 1.1 | % |
