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
• 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

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

 

 

Product overview

Product	Grade	D50 [µm]	D97 [µm]	OA [g/ 100 g]
Portaryte	B2EX	1.1	2.8	12
	B3	1.3	3.7	12
	B4	1.5	4.5	11
	B5	1.9	6.0	11
	B8	2.2	8.0	11
	B10	2.6	11.0	10
	B15	3.4	16.0	10
	B25	5.5	25.0	10
	B45	13.0	45.0	9
	B40/10	17.0	38.0	12
	B50/10	21.0	60.0	11

 

Product	Grade	D50 [µm]	D97 [µm]	OA [g/ 100 g]
Portaryte	C15	3.5	16	10

 

Brand	Grade	D50 [µm]	D97 [µm]	OA [g/ 100 g]
Portaryte	D15	4.5	16	10
	D20	6.0	20	10
	D40	8.0	36	9
	D50	10.5	54	9
	D80	13	85	8

 

Production locations Portaryte

 

 

Application

Baryte will provide:

• Chemical resistance: due to its inert nature, baryte provides good chemical resistance compared to conventional fillers.
• Gloss control: with the availability of ultrafine baryte (Portaryte B3) and a product with an optimised particle size distribution (Portaryte B40/10), it is possible to apply coatings with a broad range of gloss levels.
• Increasing density: due to its high density, baryte is very suitable to increase the density of the powder. This is a very useful tool when the product is sold by weight.
• UV resistance: being insensitive to UV radiation, baryte will reduce the coating’s degradation.