Silance Coupling Agent Si69

TECHNICAL DATA SHEET Si-69
Chemical Name: Bis [3-(triethoxysilyl)propyl] tetrasulfide
CAS NO. : 40372-72-3
Formula: (C2H5O)3SiCH2CH2CH2-S4-CH2CH2CH2Si(OC2H5)3
Formula Structure：
Equivalent Type:SI-69(Degussa,German)/Z-6940(Dow Corning,US)/KH-8454(China)
A-1289(Compton,US)/Y- 6194(UnitedCarbide,US)/KBE-846(Shin-Etsu,Japan)
Specifications
Test Item Target Values(Spec.Limits)
Sulfur Content 22% ± 1%
The average sulfur chain length 3.75±0.15
∗γ2 Content ≤3.0%
Viscosity 25℃ ≤ 14(cps)
S2 content 17±3%
S3 content 30±4%
S4 content 24±3%
S5 to S8 content 27±3%
∗ γ2: γ-chloropropyltriethoxy silane.
Application Range
1. Si-69 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.
2. Si-69 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.
3. Si-69 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 crosile-69 in polymers such as NR, IR, SBR, BR,
NBR and EPDM. Recommend dosage 1.0-4.0 PHR
Package and storage
1. Package:25kg or 200kg plastic drum and 1000 kg IBC
2. Storage: Kept in a low temperature, dry and ventilated place, avoid direct
sunlight.
3. Shelf life: One years in ventilating, cool and dry area.