Industrial Coatings / Roof Coatings / Feldspar

Feldspar

Feldspar (silicate, chemical formula Na(AlSi3O8), where Na can also be replaced by K) is one of the main constituents of the Earth’s crust. Feldspar can be characterised by:

 

  • Relatively high Mohs hardness of 6
  • Low electrical conductivity
  • Easy to wet
  • High inertness in various media.

 

And, depending on the grade:

 

  • Low content of lamellar mica (Unispar FF)
  • Low fine crystalline silica fraction (no labelling) (Unispar PG (W))
  • Whiteness (Unispar PG W).

 

Note when using feldspar: depending on the particle size distribution of certain products, they can be labelled STOT RE 2. For more detailed information, visit www.safesilica.eu.

Sibelco feldspar quarry in Cine (Turkey)

 

Basic properties

Property Value Unit
Moisture < 0.5 [%]
Hardness (Mohs) 6 (6.5) [-]
Refractive index 1.53 [-]
L.O.I. 0.5 [%]
Density 2.6 [kg/ dm3]

 

 

Product overview

Product Grade D50

[µm]

D97

[µm]

OA

[g/ 100 g]

pH L*
Unispar FF-20 6 n.d. 32 9.8
FF-30 8 n.d. 28 9.7
FF-60 19 n.d. 27 9.5
FF-150 23 n.d. 24 9.4
PG4 4 17 26 9.5 94.5
PG W7 7 25 27 8.0 97.0
PG W13 13 60 22 8.1 96.4
PG W20 20 80 19 8.2 96.2

Production locations Unispar

 

 

Application

Feldspar will provide:

 

  • UV resistance: being insensitive to UV radiation, feldspar will reduce the coating’s degradation.

 

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