Silicone Rubber Grade Low Iron Precipitated Silica A7791

White powder form,with low iron raw materials. It is high reinforced ultrafine Silica with strict purifying technology specialized use for high temperature vulcanized silicone rubber.

Item NO.:
A7791
EINECS No:
238-878-4
CAS No.:
7631-86-9
Chemical Formula:
SiO2.nH2
Surface BET (m²/g):
150-180
Properties:
Transparency, good reinforcing

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Silicone Rubber Grade Low Iron Precipitated Silica A7791

Medium Partical Size: 10-14um and BET specific surface area 150-180 m²/g

Chemical Properties

White powder form,with low iron raw materials. It is high reinforced ultrafine Silica with strict purifying technology specialized use for high temperature vulcanized silicone rubber.

It can be dissolved by NaOH,HF Other kinds of acid, water and organic solvents cannot dissolve the product. Resistance to high temperature, no combustion,good insulation, odourless properties.

Specifications

Items	Specification
Appearance	White Powder
BET specific surface area m2/g	150-180
Salt As Na2SO4% Max	0.7
SiO2 % Min	98
Heating Loss at 105°C 2h% Max	4.0-8.0
Ignition Loss at 1000°C % Max	7.0
pH Value (10% aqueous suspension)	6.0-7.0
DBP absorption Value cm³/g	2.0-2.7
Total Fe mg/kg Max	200
Medium Size (D50)µm	10-14

Application

A7791 is used widely for high temperature vulcanized silicone rubber.

A7791 has high transparent, good anti yellowing effect, high hardness effect, and better reinforcement effect.

SiO2, Precipitated Silica, White Carbon, Silicon Dioxide, Conventional Silica Powder, Amorphous Precipitated Silica, Micro pearl precipitated silica

Silicone Rubber Grade Low Iron Precipitated Silica A7791

1. Package: 10 kg/bag .

2. Storage: Kept in a low temperature, dry and ventilated place, avoid direct sunlight.

3. Shelf life: One year in ventilating, cool and dry area.

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