Silane coupling agent Si-69

1). FOREIGN TRADE NAME:
Si-69 Of Germany Degussa Company

2). CHEMICAL NAME:
Bis [3-(triethoxysilyl) propyl] tetrasulfide

3). MOLECULAR STRUCTUAL:
(C2H5O)3SiCH2CH2CH2-S4-CH2CH2CH2Si(OC2H5)3

4). PHYSICAL PROPERTIES:
1. A pale yellow clear liquid with light odor of ethyl alcohol and soluble easily in ethyl alcohol, acetone, benzene, toluene etc. Insoluble in water.
2. Density(d25): 1.069
3. Volatility (100° C /10min. ): 1.0%
4. Sulfur Content: 22% ± 1%
5. Viscosity 25degree (cps): 17.0
6. Specific Gravity (25degree): 1.080 ± 0.020
7. Refractive Index (25degree): 1.480 ± 0.020

5). APPLICATION:
It is a kind of multifunctional silane coupling agent that has been used successfully in the rubber industry. It is used to improve physical and mechanical properties of vulcanizates. It is able to markedly improve tensile strength, tearing strength and abrasive resistance and reduce compression set of vulcanizates. In addition, it can reduce the viscosity and improve the processability of rubber products.
Also it is especially suitable to improve the reinforcing properties of fillers that contain hydroxyl groups in all unsaturated polymers having double bonds or their blends. Silica, talc powder, mica powder and clay can be used in combination with it in polymers such as NR, IR, SBR, BR, NBR and EPDM.( Recommend dosage 1.0-4.0 PHR )