Oil AbsorptionNYTAL talc has low oil absorption in the 25-40g/100g range.

NYTAL 3300 and 7700 grades have a narrower PSD and

lower oil absorption than standard Nytal grades. Minex®

oil absorptions are even lower (20-35g/100g), allowing

higher loadings and increased solids volume in primers and

topcoats to meet increasingly stringent VOC regulations

without compromising rheological properties.

pHThe pH of NYTAL talc is in the 9.5 to 10 range. The pH

of Minex® is similar, providing formulation compatibility and

package stability.

BrightnessVanderbilt reports GE brightness values of 88 or higher for

NYTAL. Minex® offers TAPPI brightness values in the 80-90

range for clean, crisp whites and tint bases.

WeatheringMinex® S-4, Minex® S-7, and Minex® S-10 are the

industry standards for colour retention and chalking

resistance. Minex® provides superior colour retention and

chalk, dirt and mildew resistance when compared to Nytal.

Weathering studies are available upon request.

Minex® Functional Fillers

MorphologyNYTAL talc, produced in Gouverneur, New York by R T

Vanderbilt, is a mineral mixture containing approximately

70% tremolite, a hard silicate, and 30% platy talc. As such

its behaviour in paint formulations is more similar to hard

fillers such as Minex® than it is to traditional talcs. It can be

seen from the micrographs below that both minerals have

an angular morphology.

V.08.2011

Replacement for Nytal Industrial Talcs

Figure 1 Nytal®

Figure 2 Minex®

Property Comparison TableGrade D50/µm Hegman pH Brightness Oil Absptn/g/100g

Nytal 200 10 1 9.5 88 29

Minex 3 10.8 2.5 9.9 87 24

Nytal 300 5.5 4 9.5 88 29

Minex S-6 5.1 5 10.1 85 22

Nytal 400 3.0 5.0 9.5 88 39

Minex S-7 4.3 5.5 10.2 86 27

Nytal 7700 2.0 6.5 9.5 91 39

Minex S-10 1.9 6.4 10.3 85 33

Nytal 3300 10 4.0 9.5 88 25

Minex S-4 9.2 4.0 10.1 82 21

Sibelco Specialty Minerals Europe

Op de Bos 300, NL-6223 EP Maastricht

P.O. Box 423, NL-6200 AK Maastricht

T + 31 (0)43 3663777, F +31 (0)43 3648272

ssme@sibelco.com

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