Disulfide Silane Coupling Agent Crosile® 75 for Tyre Rubber Industry

Crosile® 75 (Bis(3-triethoxysilylpropyl)disulfide) TESPD is a Disulfide Silane Coupling Agent ,polysulfidic organosilane and has been widely in the rubber industry. Crosile® 75 Silane couling agent is used to improve the reinforcing capability of fillers with silanol group on their surface,and also as an integral part of curing systems to improve cross-linking network properties.

Item NO.:
Crosile® 75
Chemical Name:
Bis(3-triethoxysilylpropyl)disulfane
Chemical Formula:
C18H42O6S4Si2
CAS No.:
56706-10-6
EINECS No:
260-350-7
Properties:
Crosile®75 is a pale-yellow clear liquid with light odor of ethyl alcohol and soluble easily in ethyl alcohol, acetone, benzene, toluene etc. It is unsoluble in water.

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Disulfide Silane Coupling Agent Crosile® 75 for Tyre Rubber Industry

Chemical Name

Bis [3-(triethoxysilyl)propyl] disulfide

CAS NO.

56706-10-6

Formula

(C2H5O)3SiCH2CH2CH2-S2-CH2CH2CH2Si(OC2H5)3

Formula Structure

Properties

Crosile® 75 (Bis(3-triethoxysilylpropyl) disulfide) TESPD is a bifunction polysulfidic organosilane and has been widely in the rubber industry. Crosile® 75 TESPD is used to improve the reinforcing capability of fillers with silanol group on their surface,and also as an integral part of curing systems to improve cross-linking network properties.

Compared to the polysulfidic organosilane Crosile® 69(Bis(3-triethoxysilylpropyl)tetrasulfide), Crosile®75 has a higher temperature stability and therefore allows higher mixing temperatures.

Crosile® 75 imparts greater tensile strength, higher module, reduced compression set, increased abrasion resistance and optimized dynamic properties.

Synonyms

BIS(TRIETHOXYSILYLPROPYL)DISULFIDE, Bis(3-triethoxysilylpropyl)disulfane, BIS[3-(TRIETHOXYSILYL) PROPYL]-DISULFIDE, Bis[3-(triethoxysilyl)propyl] persulfide, 3,3′-Bis-(triethoxysilylpropyl) disulfide, Bis[3-(triethoxysilyl)propyl] perdisulfide, bis[γ-(triethoxysilyl-propyl]-disulfide,Bis-(γ-triethoxysilylpropyl)-disulfide

Specifications

Properties	Units	Target Values (Spec,Limits)
Alcohol content	%(wt)	≤0.5%
γ2 Content	%(wt)	≤3.0%
Other impurity content	%(wt)	≤1.0%
Viscosity 25°C (cps)	Cps	≤14.0
Sulfur Content	%(wt)	15.0 ± 1.0
S2 content	%(wt）	80-90
S4-S8 content	%(wt)	10.00%
The average sulfur chain		2.20±0.15
Other Impurity Content	%(wt)	Max 4.0
Specific Gravity (25°C)	g/cm3	1.080 ± 0.020
Refractive Index (25°C)		1.480 ± 0.020

Application

Crosile® 75 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.
Crosile® 75 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®75 in polymers such as NR, IR, SBR, BR, NBR and EPDM.

Recommend dosage 1.0-4.0 PHR

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