Tetrasulfide Silane Coupling Agent Crosile® 69 for Rubber

Silane coupling agent Crosile®69 is bifunctional, sulfur-containing organosilane for rubber ,tyre 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 coupling agent for Rubber

Chemical Name

Bis [3-(triethoxysilyl)propyl] tetrasulfide,Silane 69,TESPT

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, Tetrasulfane, Bis(3-Triethoxysilylpropyl), Silane coupling agent

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

Crosile® 69 (TESPT) Application Guide

1. A multifunctional silane coupling agent designed for the rubber and tire industries; significantly enhances the physical-mechanical properties of vulcanizates.

2. Key benefits

Markedly higher tensile strength, tear strength and abrasion resiszqatance
Reduced compression set
Lower compound viscosity and improved processability

3. Recommended systems

Fillers: Silica, talc, mica, kaolin and other hydroxyl-containing minerals
Polymers: NR, IR, SBR, BR, NBR, EPDM and other unsaturated rubbers or their blends

4. Typical dosage: 1.0–4.0 PHR (parts per hundred rubber)

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

Si69 Silane coupling Agent (Tespt)