Rubber / Rubber Compounding / Baryte

Baryte

Mineral: Baryte

 

Natural baryte (barium sulphate, chemical formula BaSO4) can be characterised by:

  • High inertness in various media
  • High density and, as a result, low oil absorption
  • Medium Mohs hardness of 3
  • High Refractive Index of 1.64
  • Easy wetting
  • Easy to disperse (also compared to precipitated barium sulphate)

Natural barium sulphate comes without any residual salts when compared to precipitated grades. In addition, natural barytes are easier to disperse than precipitated grades.

 

Basic properties

Portaryte B C D
Property Value
Unit
Moisture 0.1 0.1 0.1 [%]
pH 9 9 9 [-]
Hardness (Mohs) 3.5 3.5 3.5 [-]
Refractive index 1.64 1.64 1.64 [-]
Colour (D65/ 10°) L* 96 91.5 beige [-]
BaSO4 + SrSO4 98.5 97.5 96.5 [%]
SiO2 1 2 3 [%]
Fe2O3 0.05 0.15 0.3 [%]
Density 4.4 4.4 4.4 [kg/ dm3]

 

Products:

Product Grade D50

[µm]

Portaryte B15 3.5
D40 8.0
D50 10.5/10.0
D80 13.0/15.5

 

Production Location: Brassington (UK), Geertruidenberg (NL), Poviglio (IT), Ramensky (RU)

Application: 

Portaryte products’ main benefit when used in rubber compounds is densifying and sound-deadening. They will also provide chemical resistance and weatherability. Due to their low hardness the material is also easy to process and will allow for a smooth surface of the extruded product.

Functionalities

Performance

Durability

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