Industrial Coatings / Inks / Nepheline syenite

Nepheline syenite

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)
  • Brightness
  • 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).

 

Basic properties

Property Value Unit
Hardness (Mohs) 6 [-]
Refractive index 1.51 – 1.53 [-]
Density 2.6 [kg/ dm3]

 

 

 

 

Product overview

Product overview Minex

Product Grade D50

[µm]

Tappi

[-]

OA

[g/ 100 g]

pH

[-]

Moisture

[%]

Minex 2 13.6 85.5 26.5 10.3 0.09
3 11.0 88.0 27.0 10.3 0.09
4 7.6 88.7 30.0 10.4 0.10
7 3.5 90.0 33.0 10.4 0.16
10 2.6 90.5 35.0 10.5 0.18
12 1.5 92.0 34 10.5 0.20

Production location Minex

 

 

Product overview Nepheline

Product Grade D50

[µm]

R457

[%]

OA

[g/ 100 g]

pH

[-]

Moisture

[%]

Nepheline S4 PO 9.2 81.5 21 10.1 0.1
S6 PO 5.1 84.4 22 10.2 0.2
S7 PO 4.3 85.4 23 10.4 0.2
S10 PO 1.9 85.6 31 10.4 0.4

 

Mining locations Nepheline

 

 

Application

Nepheline syenite will provide:

 

  • Abrasion resistance: due to its hardness of 6 on Mohs scale, nepheline syenite will increase the coating’s resistance to wear.
  • Clarity: due to its fairly low refractive index, nepheline syenite becomes transparent when combined with certain binder systems.
  • UV-curing compatibility: being transparent for UV radiation, nepheline syenite does not block the curing mechanism.

 

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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