VANSIL® WG Wollastonite
- CAS Number
- 13983-17-0
- EC Number
- 237-772-5
- Chemical Name
- Calcium Metasilicate, Pumice
VANSIL® WG Wollastonite is a high aspect ratio, long needle grade of wollastonite. It is used principally as a mineral filler and reinforcing agent to enhance mechanical strength properties in high build coatings, texture paint, and block fillers. In high film build coatings, the needle-like shape of VANSIL WG improves mud crack resistance and sag resistance, while also contributing to peak retention in texture coatings. 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. In calcium silicate board and fiber cement, VANSIL WG increases flexural and compressive strength, reduces shrinkage, and reduces cracking. It is recommended that high aspect ratio grades of VANSIL be added late in process to avoid possible damage to the needle structure from high shear mixing.
Properties
- Physical Form
- Powder
- Solid
Identification
- CASE Ingredients Features
- Abrasion ResistanceAlkali ResistanceChemical ResistanceCorrosion ResistanceCrack ResistanceExcellent FlowExcellent Scratch ResistanceExcellent WeatherabilityGood BrightnessGood Mechanical PropertiesGood Shrinkage ResistanceHigh Compressive StrengthHigh Sagging ResistanceImproved Flexural StrengthImproves Coating Hiding PowerIn-Can StabilityProvides Good TextureSag ResistanceWeather Resistance
Product families
Applications
- Decorative Paints
- Decorative Paints Coatings & Stains
Product Families
- Fillers & Extenders
- Mortar & Gypsum Additives
Other characteristics
- Brand
- VANSIL
- End Uses
- Latex, Radiation Curable Coating
- Features
Abrasion Resistance, Alkali Resistance, Chemical Resistance, Corrosion Resistance, Crack Resistance, Excellent Flow, Excellent Scratch Resistance, Excellent Weatherability, Good Brightness, Good Mechanical Properties, Good Shrinkage Resistance, High Compressive Strength , High Sagging Resistance, Improved Flexural Strength, Improves Coating Hiding Power , In-Can Stability, Provides Good Texture, Sag Resistance, Weather Resistance
- Functions
- Extender, Filler
- Usage
Functional filler in adhesives, abrasives, ceramics, elastomers, insulating materials, paint, plastics, resins, sealants, and wallboards.
- Markets
- Building & Construction
- Paints & Coatings
- Cure
- Radiation Cure
- Coating Type
- Latex
- Radiation Curable Coating
- Technology
- CASE Ingredients
- Industrial Additives & Materials
- Background
VANSIL WG is a high aspect ratio, long needle grade of wollastonite. It is used principally as a reinforcing agent to enhance mechanical strength properties in coatings. In high film build coatings, VANSIL WG improves mud crack resistance. In texture coatings, VANSIL WG also improves peak retention. The naturally high pH of wollastonite helps to buffer latex paints and coatings which contributes to improved corrosion resistance. Other applications include cementitious board and block fillers. High aspect ratio wollastonite is also used to reinforce epoxy and other resin based adhesives.
- Chemical Inventories
- AICS (Australia)
- DSL (Canada)
- ECL (Korea)
- ENCS (Japan)
- IECSC (China)
- ISHL (Japan)
- KECI (Korea)
- NZIoC (New Zealand)
- Industrial Additives Functions
- Filler
Technical data
Table 1 of 2
18 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Dry Brightness (Photovolt) | min. 85 | — | T-954 |
| Fineness (Retained on 200 mesh) | max. 15 | % | LAB 7 |
| Heat Loss | max. 0.5 | % | LAB 10 |
| Particle Size Distribution (Horiba LA-300, D10) | 4.0 | μm | — |
| Particle Size Distribution (Horiba LA-300, D50) | 28.0 | μm | — |
| Particle Size Distribution (Horiba LA-300, D90) | 117.0 | μm | — |
| Particle Size Distribution (Horiba LA-300, D95) | 146.0 | μm | — |
| Wet Screen Analysis (Plus 100 mesh) | max. 2 | % | — |
| Wet Screen Analysis (Plus 200 mesh) | 15 - 20 | % | — |
| Wet Screen Analysis (Plus 325 mesh) | 30 - 35 | % | — |
| Density | 2.9 | g/cc | — |
| pH Value (10% SIurry) | 10 - 11 | — | ASTM D 1208 |
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 | % |
