ECOPOWER Rubber Grade Precipitated Silica

Rubber Grade Precipitated Silica

Rubber-grade silica is a synthetic silicon dioxide designed to provide effective reinforcement in rubber compounds. It improves tensile strength, tear resistance, abrasion resistance, and processing performance, making it suitable for tires, footwear, rubber rollers, conveyor belts, and other industrial rubber products.

Item NO.:
Rubber Grade
EINECS No:
238-878-4
CAS No.:
10279-57-9
Chemical Formula:
SiO2
Properties:
White powder form, precipitated silica is made of sodium silica with sulfuric acide through hydrolysis. It can be dissolved by NaOH, HF. Other kinds of acid, water and solvents cannot dissolve the product.

Inquire Now

Rubber Grade Precipitated Silica

Three shapes of silica

Chemical Properties

The material is produced through the controlled reaction of sodium silicate and sulfuric acid. It is supplied as a white amorphous powder and is available in different forms, including powder, granules, and micropearls.

Specifications

Precipitated Silica Powder
Type	Felcosil-120	Felcosil-140	Felcosil-165	Felcosil-185	Felcosil-195
Heating loss（105° 2h）, %	4.0-8.0
Lgniting loss（1000° 2h）, %	≤7.0
DBP Absorption，cm³/g	2.00-3.50
Sieve residue，%	45um≤0.5
pH（5% suspension）	6.0-8.0
SiO2 % Min，%	≥97.0
BET specific surface area，m²/g	120±15	140±15	160±15	180±15	190±15
Salt as NA2SO4，%	≤2.0
Pellet hardness	-

Precipitated Silica White Micro Pearl
Type	Felcosil-175MP	Felcosil-185MP	Felcosil-195MP
Heating loss（105° 2h）, %	4.0-8.0
Lgniting loss（1000° 2h）, %	≤7.0
DBP Absorption，cm³/g	2.00-3.50	2.00-2.80	2.00-3.5
Sieve residue，%	100Mesh≥80.0
pH（5% suspension）	6.0-8.0
SiO2 % Min，%	≥97.0
BET specific surface area，m²/g	170±15	180±15	190±15
Salt as NA2SO4，%	≤2.0
Pellet hardness	-

Precipitated Silica White Granular
Type	Felcosil-175GR	Felcosil-185GR	Felcosil-195GR
Heating loss（105° 2h）, %	4.0-8.0
Lgniting loss（1000° 2h）, %	≤7.0
DBP Absorption，cm³/g	2.00-2.80
Sieve residue，%	60Mesh≥75
pH（5% suspension）	6.0-8.0
SiO2 % Min，%	≥97.0
BET specific surface area，m²/g	170±15	180±15	190±15
Salt as NA2SO4，%	≤2.0
Pellet hardness	≤70