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Aluminium Silicate

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We are one of the major Exporters of Aluminium Silicate in the market. Aluminium Silicate which is chemically denoted as Al2 Si O3 is commonly used as filler as well as anti settling agent in paint. It is also used as semi reinforcing agent in rubber. Aluminium Silicate is available in two of its major forms i.e. Sodium Aluminium Silicate and Potassium Aluminium Silicate.

Typical Physiochemical Properties of Aluminium Silicates

MANUFACTURING PROCESS
Aluminium Silicate is first precipitated in large tanks. It is then filtered and washed dried and micronized on most modern plant to prevent contamination. Our R&D department has developed the precipitation process to provide accurate control of particle size and surface area. The properties have been optimized in our different grades according to the application.

Property	Unit	Super Special Grade	Special Grade	Super Grade	Comm. Super Grade	General Grade
Appearance				WHITE POWDERS
Bulk Density*	gm/cc	0.20-0.25	0.24-0.28	0.30-0.35	0.35-0.40	0.40-0.46
pH Value	Micron	9 to 10	9 to 10	8.5 to 9.5	8 to 9	7 to 8
Average particle size	%	5 to 6	5 to 6	5 to 6	5 to 6	6 to 8
Residue on 700 mesh	%(max)	1.0	1.0	1.0	1.0	1.0
Water absorption	%	95-105	70-80	60-70	50-60	35-45
SiO₂	%	68	64	61	58	60
Al₂O₃	%	17	20	24	28	30
Na₂O	%(max)	0.05	0.06	0.05	0.05	0.05
Moisture	%(max)	3.0	2.0	1.5	1.5	0.5
Packing	Kgs/bag	12.5	15	18	20	25

Advantages of Our Products in Paints

Part of white pigment like Titanium-dioxide (10% or more) can be replaced without loss of opacity.
Give faster surface and through-drying in product which also stand up better to abrasive treatment.
Excellent substrates for high gloss finishes as they ensure good levelling out.
Act as anti-setting agents for pigments and fillers. The viscosity of decorative paints containing our product is highly constant over extended periods of time. Being basic, they also have positive effect on storage stability.
Give excellent thicksotropy and facilitate dripless application.

Advantages in Rubber
The particles of the filler used interact with the polymer, thus changing the properties of the mix and vulcanized material. For a filler with definite chemical composition, this interaction becomes more intensive as the surface area of the filler particles increases.Due to fine micronization of our products, they have very large surface area and thus give excellent properties in terms of tensile strength, modulus and resistance to tear and abrasion. They are particularly suitable for soling and microcellular sheets as they give relatively fast cures and enable production of soling materials to be streamlined.

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