Dear Sir/Madam

With this letter I would like to present you with some information regarding microsphere that is currently on our offer. The microsphere in question is characterized by very high quality and very good granulation. In the attachment you will find physical analysis of the product.

We are able to produce microsphere in fractions 0-80 microns 0-150 microns and 0-300 microns depending on the order.

VERSUS LTD is a producer of highest quality microsphere from fly ash. Around the world most of the countries obtain microsphere through old methods of combusting coal in power stations and power plants. However, the quality of microsphere depends on the quality of coal used in the combustion process. World renowned microsphere is made in power plants in Kazakhstan. Versus LTD has access to this product and is able to supply unlimited amount of wet microsphere and around 1000 tons monthly of dry microsphere sorted to appropriate fractions. Should it be required by a customer we are able to adjust our production process and deliver the product in appropriate fractions. Microspheres supplied by us are mostly white colour however it is also possible to obtain white microspheres with different shades of grey colour. If required we are happy to provide samples for approval.

Microspheres are spherical alumino-silicate 

Particles with a diameter between 10-500 μm, filled with combustion gasses mainly carbon dioxide and nitrogen. Thickness of the sphere shell is between 2-10 μm. Inside microsphere contains spherical pores (pic 1)

Specific structure of the grain particle influences its low bulk density (0,32 – 0,45 kg/dm³). Main components of the microsphere are : SiO₂, Al₂O₃, Fe₂O₃, MgO, K₂O i CaO. Taking into consideration analysis of phase component the predominant phase is amorphic silicone-aluminum and mullit. As for the concentration of natural radioactive elements microsphere meets the safety requirements. Value of f1 and f2 indicators does not exceed:

• f1 max ≤ 1,2
• f2 max ≤ 240 Bq/kg,
• due to this reason microspheres can be used as raw material or construction material in buildings destined for people or live inventory

Chemical composition

Physical properties

• colour – white, bright grey to dark grey
• bulk weight in dry state – 400 ± 30 [kg/m3]
• weight of the capsule casing – 2200 ± 200 [kg/m3]
• relative density – 690 ± 50 [kg/m3]
• hardness in Mohss scale – 6 ± 1
• heat conduction – 0,07 ± 0,03 [W/m2K]
• pH rate in water extract – 7 ± 1
• Melting point – 1495 ± 10 [°C]
• Softening point – 1220 ± 10 [°C]
• Internal pressure of microspheres – 0,2 ± 0,1 [bar]
• Falling elements – max. 5 %
• Content of water in dry microsphere – < 0,5 %

Main areas of microsphere application:

• construction
• ceramics
• steel industry
• plastic industry
• automotive industry
• road engineering and geoengineering

Application

Microsphere is a light, heat and fire-resistant composite filler primarily used as: 

• Component for insulation screeds (so called warm plastering) and as a component of insulating prefabricated construction elements,
• Component for production of thermal and acoustic insulation of very high heat and fire resistance
• Filler in plastic, paints, varnishes etc
• Filling of exploration wells in mining industry
• Component of insulating powders for thermal insulation of alloy steel.

Dry microsphere proved to be useful as a component of:

• Cement ceiling insulation,
• Plasters with high thermal and acoustic insulation, especially in construction,
• Tiles and insulation decorative fittings,
• ceramics,
• insulating-damping mastics in automotive industry

Basic areas of application:

1. With thermosetting plastics- dry microsphere together with epoxy and polyester resins creates foams of lower density, higher rigidity, thermal insulation and heat and fire resistance and all this can be obtained at lower production costs.

2. With thermoplastic materials- dry microsphere when compared with typical fillers like chalk, asbestos, or glass fibre creates products of significantly lower density, higher rigidity, stability and better surface smoothness. Dry microsphere as an additive to sealing compounds and putts prevents from volume crackings and allows for lower use of synthetic rubber substituting it partially.

3. Dry microsphere is especially useful as a foam filler (PCV, polyurethane      etc), to which high stability of form and low contraction is required. 

4. Dry microsphere is an excellent filler for various surface covers, first and foremost for thermo insulations and soundproofing (isolation screeds in construction, container and swimming pool isolations, isolation and soundproofing mastics)

5. Dry microsphere binds exceptionally well with “water (liquid) glass” under higher pressure, for this reason this composite is widely used as a material for light isolation plates and covers

6. Adding microsphere to traditional binding materials enables production of warm plaster, light grog, light plasters, plates and isolation fittings.

Thanks to microsphere following properties are attributed to final materials: lightness, fire resistance, thermal and acoustic isolation. Microsphere is characterized by low bulk density, low thermal conductivity coefficient, low absorbability and high thermal resistance for both high and low temperatures. Microsphere is mainly used as an additive to thermal and acoustic isolation materials of high heat and fire resistance. Adding microsphere as a light filler to construction composites based on concrete and other mineral binders positively influences the durability of the composite in various usage conditions. Thanks to pozzolanic properties microsphere can act as a light mineral filler thus improving thermo isolation properties of mortars and concrete based on mineral binders. Microsphere might also be used as recycled plastic filler and component of isolation backfills for warming steel alloy ingots. In road construction microsphere may be used as an asphalt filler.