Silane Coupling Agent Crosile®69 Bis(3-triethoxysilylpropyl)tetrasulfide in Rubber Industry
Type
Crosile®69
Chemical Properties
Silane coupling agent Crosile®69 Bis[3-(triethoxysilyl)propyl]tetrasulfide (TESPTS) is commonly used as a crosslinking agent and reinforcing filler in rubber manufacturing. TESPT films provide corrosion protection to metal substrates. It is also used as a precursor for the synthesis of mesoporous silicones.
Equivalent Type
Silane coupling agent Si 69 (Evonik), Z-6940(Dow Corning), A-1289 (Momentive), KBE-846 (Shin- Etsu), TESPT
Specifications
|
Properties |
Units |
Target Values (Spec, Limits) |
|
Alcohol content |
%(wt.) |
≤0.5% |
|
CLPTES Content |
%(wt.) |
≤3.0% |
|
Other impurity content |
%(wt.) |
≤1.0% |
|
Viscosity 25°C (cps) |
Cps |
≤14.0 |
|
Sulfur Content |
%(wt.) |
22.5(21.7-23.3) |
|
Average chain Length |
3.70(3.55-3.85) |
|
|
S2 content |
%(rewet) |
18.0(15.0-21.0) |
|
S3 content |
%(rewet) |
30.0(27.0-33.0) |
|
S4 content |
%(rewet) |
24.0(21.0-27.0) |
|
S5 to S8 content |
%(rewet) |
27.0(24.0-30.0) |
|
Volatility (100°C /10min.) |
≤ 1.0% |
|
|
Specific Gravity (25°C) |
1.080 ± 0.020 |
|
|
Refractive Index (25°C) |
1.480 ± 0.020 |
Application
Crosile®69 is used in rubber products：
1) As a coupling agent for non-black fillers;
2) To maintain the vulcanization balance and increase the anti-sulfur return ability;
3) As a vulcanizing agent, it gives it good heat aging properties.
