Silicone Rubber Grade 779 Precipitated Silica

Resistance to high temperature, no combustion, goodinsulation, odourless properties.

Item NO.:
779
EINECS No:
238-878-4
CAS No.:
7631-86-9
Chemical Formula:
SiO2.nH2
Surface BET (m²/g):
130-160
Properties:
Easily dispersed, good processing

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Silicone Rubber Grade 779 Precipitated Silica

Medium Partical Size: 10-14um and BET specific surface area 130-160 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 in sulation, odourless properties.

Specifications

Items	Specification
Appearance	White Powder
BET specific surface area m²/g	130-160
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 2h% Max	7.0
pH Value (5% 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

779 take better reinforcement effecton high temperaturevulcanized silicone rubber.

It has high transparent,good antiyellowing effect,and good processability properties.

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

Silicone Rubber Grade 779 Precipitated Silica

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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