Enhanced TDS
Knowde-enriched technical product data sheet
Identification & Functionality
- Chemical Family
- Chemical Name
- CASE Ingredients Functions
- CAS No.
- 37244-96-5
- EC No.
- 609-369-8
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- CASE Ingredients Features
- Product Highlights
- Nepheline Syenite is a naturally occurring, silica-free, anhydrous sodium-potassium alumina silicate, that delivers improved product performance and is accordant with modern environmental and industrial hygiene standards.
- Nepheline syenites a composed of three primary minerals: the albite form (sodium) of feldspar, the microcline form (potassium) of feld,spar and nepheline (feldspathoid).
- The existence of nepheline and the absence of crystalline silica is what sets this uniquely occurring rock apart from feldspar fillers, which contain just albite and microcline.
- Like feldspar, it provides alkalis that act as a flux in the manufacture of glass and ceramics. In glass production, alumina acts as a matrix of stabilizer, enhancing the workability of molten glass, and increasing the resistance for scratching, breaking and chemical protection.
- These oxides primarily exist in nepheline and alkaline feldspar, and there is no free crystalline silica present in APNS.
- Product Benefits
In filler applications, nepheline syenite primarily serves as a performance enhancer and has the following functions/advantages:
- Improves weatherability
- Improves abrasion, scrub, stain, mildew and chalking resistance
- High brightness (> 92)
- Great UV protection to resin and pigment system, and high yellowing resistance
- Low tint strength even at high loading that maximizes the color strength
- Optimal refractive index allows for high loading in transparent and translucent coatings and stains
- Good dispersibility and low oil absorption in both water and solvent systems, and low viscosity even in high filler/pigment loading
- Stable pH and chemical inertness
- Low vehicle demand and exceptional resistance to frosting
Applications & Uses
- Coating Type
- Application
Filler
Properties
- Typical Properties
Value Units Test Method / Conditions Bulk Density 0.83 - - Oil Absorption approx. 22 g/100g - Whiteness 82.5 - - CIELAB L 94.0 - - CIELAB a -0.5 - - CIELAB b 4.7 - - Hardness 6.0 - mohs pH 8.9 - - Moisture Content 0.3 % - - Particle Size Distribution
Value Units Test Method / Conditions Particle Size (Passing Through 106 μm) 100.0 % - Particle Size (Passing Through 75 μm) 100.0 % - Particle Size (Passing Through 45 μm) 99.9 % - Particle Size (Passing Through 30 μm) 98.5 % - Particle Size (Passing Through 20 μm) 90.0 % - Particle Size (Passing Through 15 μm) 82.0 % - Particle Size (Passing Through 10 μm) 63.0 % - Particle Size (Passing Through 5 μm) 35.0 % - Particle Size (D50) 7.0 μm - - Chemical Analysis
Value Units Test Method / Conditions SiO₂ Content approx. 61.50 % - Al₂O₃ Content approx. 20.80 % - Fe₂O₃ Content max. 0.15 % - TiO₂ Content approx. 0.03 % - Na₂O Content approx. 8.40 % - K₂O Content approx. 6.10 % - CaO Content approx. 0.75 % - MgO Content approx. 0.10 % -