Tetrasulfide Silane Coupling Agent Crosile® 69 for Rubber

Silane coupling agent Crosile®69(Si69) is bifunctional, sulfur-containing organosilane for rubber applications in combination with white fillers containing silanol groups

Item NO.:
Crosile® 69
Chemical Name:
Bis [3-(triethoxysilyl) propyl] tetrasulfide
Chemical Formula:
C18H42O6S4Si2
CAS No.:
40372-72-3
EINECS No:
254-896-5
Properties:
1. Sulfur containing organosilane modified Silica 2. Greater tensile strength 3. Reduced compression set 4. Increased abrasion resistance 5. Low rolling resistance

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Tetrasulfide Silane Coupling Agent Crosile® 69 for Rubber

Bis-[γ-(triethoxysilyl)-propyl]-tetrasulfide Silane for Rubber

Chemical Name

Bis [3-(triethoxysilyl)propyl] tetrasulfide

CAS NO.

40372-72-3

Formula

(C2H5O)3SiCH2CH2CH2-S4-CH2CH2CH2Si(OC2H5)3

Formula Structure

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 Crosile®69 films provide corrosion protection to metal substrates. It is also used as a precursor for the synthesis of mesoporous silicones.

Equivalent Type

Bis(3-triethoxysilylpropyl)tetrasulfane,Bis(3-(ethoxysilyl)propyl)tetrasulfide,Bis(triethoxysilylpropyl)tetrasulfane,Bis[3-(triethoxysilyl)propyl]tetrasulfide,Xiameter OFS 6940,Couplink 89,Tetrasulfane, Bis(3-Triethoxysilylpropyl)-,Silane coupling agent Si 69 (Evonik), Z-6940(Dow Corning), A-1289 (Momentive), KBE-846 (Shin- Etsu), TESPT,Silquest A 1289,Luvomaxx TESPT,Kh 845-4-2,Silane Si69,Bis-(γ-triethoxysilylpropyl)-tetrasulfide,Coupling Agent-Si-69,SCA98,HP669, JH-69

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	% ( wt)	18.0(15.0-21.0)
S3 content	% (wt)	30.0(27.0-33.0)
S4 content	% (wt)	24.0(21.0-27.0)
S5 to S8 content	% ( wt)	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

1. Crosile® 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. Crosile® 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. Crosile® 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

Bis[γ-(triethoxysilyl)propyl]tetrasulfide,Bis-[γ-(triethoxysilyl)-propyl]-tetrasulfide,Silane Coupling Agent Si-69,Silane Coupling Agent A-1289,Silane Coupling Agent KH-858,Bis-[3-(triethoxysilylpropyl)]-tetrasulfide

Tetrasulfide Silane Coupling Agent Crosile® 69 for Rubber

Packing:

25 kg /drum, it loads 16 MT/ 20 FCL with pallet

200 kg /drum, it loads 16 MT/20 FCL with pallet

1060 kg in plastic drum, 21.2 MT/20 FCL with pallet.

Storage:

Kept in a low temperature, dry and ventilated place, avoid direct sunlight.

Shelf life:

One year in ventilating, cool and dry area.

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