Whatsapp us

Felcosil-779 Silica for Silicone Rubber Compounder

Felcosil-779 as silica low-dust, 10–14 µm particles with 130–160 m²/g surface area deliver high reinforcement for stronger, clearer, heat-resistant HTV silicone rubber.

It is widely used by silicone rubber compounders and silicone product manufacturers to achieve superior mechanical properties, outstanding transparency, and reliable processing performance.

Item NO.:
Silicone-rubber-grad
EINECS No:
238-878-4
CAS No.:
7631-86-9
Chemical Formula:
SiO2.nH2
Surface BET (m²/g):
130-160
Properties:
Felcosil-779: low-dust, 10–14 µm particles with 130–160 m²/g surface area deliver high reinforcement for stronger, clearer, heat-resistant HTV silicone rubber.

Inquiry now

Product Detail
Packaging and Transportation

Felcosil-779 Silica for Silicone Rubber Compounder

Silicone-rubber-grade precipitated silica (white carbon black) engineered for high-temperature vulcanized (HTV) silicone rubber.

It is widely used by silicone rubber compounders and silicone product manufacturers to achieve superior mechanical properties, outstanding transparency, and reliable processing performance.

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

Recommended Application

• Reinforcing filler for HTV silicone rubber compounds (gaskets, keypads, oven seals, cable jackets)

• Dosage : 20–60 phr (parts per hundred rubber) depending on hardness & transparency target

• Processing : add together with base polymer; no pre-drying required under normal humidity (< 70 % RH)

Packaging:

Net 10 kg / 20 kg multi-layer kraft bags with PE liner; big bags available on request.

For additional technical assistance or sample requests please contact our sales office

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

Silicone-rubber-grade silica Felcosil-779

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.

Leave A Message

If you are interested in our products and want to know more details, please leave a message here, we will reply you as soon as we can.

Tags :

Related Products

High-Anti-Yellowing Silica Felcosil- 800

Felcosil-800 is a high-anti-yellowing precipitated silica; its 10–14 µm, low-dust particles and 130-160 m²/g surface area deliver strong reinforcement. The low-iron formulation keeps HTV silicone rubber highly transparent, non-yellowing and heat-resistant, while just 30 phr quickly increases hardness and strength—ideal for clear keypads, seals and cable jackets.

Silicone-Rubber-Grade Felcosil-779-1

Felcosil-779-1 gives HTV silicone rubber high transparency, extra hardness and superior reinforcement while keeping the compound bright and non-yellowing.

Precipitated Silica for Silicone Rubber

In the silicone rubber industry, Precipitated Silica not only has better tensile strength and wear resistance, but also has good transparency, no whitening and no deformation when stretched.

Felcosil-750 High Surface Area Silica in Matting Agent Coating

ECOPOWER Silica Matting Agent is White powder form superfine silica,which is made by specific sol-gel method process. It can be dissolved by NaOH,HF.

Alkyl Silane Coupling Agent Crosile® 310 n-Propyltrimethoxysilane

Silane Coupling Agent Crosile® 310 soluble in a variety of organic solvents.

Thiocyano Group Silane Coupling Agent Crosile® 264

Crosile® 264 Thiocyanatopropyltriethoxysilane is a bifunctional, sulfur-containing organosilane for Rubber applications in combination with white fillers containing Silanol Group.

Liquid C5 Hydrocarbon Resin

Liquid C5 Hydrocarbon Resin is a liquid aliphatic resin with light color and low specific gravity.

PAMS Resin Alpha Methyl Styrene Resin

The Alpha Methyl Styrene resin is the monomer petroleum resin obtained by the copolymerization of α-methyl styrene and the second monomer. AMS Resin is a water-white, transparent, low-molecular-weight thermoplastic resin with a softening point of 80–150 °C. Compatible with numerous polymers, it lowers processing temperatures by 15–20 °C while markedly improving peel strength, hardness, and aging resistance. Low-odor and low-VOC, it is widely used for tackifying, reinforcing, modifying, and eco-friendly formulations.

Categories