Nepheline syenite (silicate, naturally occurring blend of albite, microcline and nepheline) is a feldspatic mineral mined in Canada and Norway.
Nepheline syenite can be characterised by:
- High purity
- Absence free crystalline silica (free of labelling)
- Relatively low refractive index, making it a transparent filler in various binders
- High inertness in various media
- Easy wetting
- Transparency for UV-radiation (ie. suitable for UV-curing processes).
|Refractive index||1.51 – 1.53||[-]|
Product overview Minex
[g/ 100 g]
Production location Minex
Product overview Minex S
[g/ 100 g]
Mining locations Minex S
Nepheline syenite will provide:
- Dirt pick-up resistance: the presence of nepheline syenite improve the resistance of the coating towards dirt (for example from the atmosphere).
- Ease of tinting: due to the combination of refractive index, brightness and color, paints including nepheline syenite will give excellent reproducible colour results when working with tinting systems.
- Texture effect: usage of coarse grades will ensure texture to the surface of the coating;
- Tint retention: paints including nepheline syenite show improved tint retention over other minerals when subjected to natural weathering.
- UV resistance and weatherability: due to its inertness, nepheline syenite supports good UV and weatherability performance to exterior architectural coatings.
Advantage over quartz and cristobalite and certain feldspar grades: nepheline syenite grades are free of labelling, and can therefore be used as an alternative when labelled grades of other mineral fillers are no longer allowed or wanted.
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