Sulfur-Silane Coupling Agent, solid, HP-669C /Z-6945(Dowcorning), Mixture of Bis-[3-(triethoxysilyl)-propyl]-tetrasulfide and Carbon Black

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Product Detail

Product Tags


Mixture of Bis-[3-(triethoxysilyl)-propyl]-tetrasulfide and Carbon Black

Equivalent Product Name


Physical Properties

It’s black small pellet with light odor of alcohol.


Sulfur Content(%)

12.0± 1.0

Insoluble Content in butanone(%)

52.0 ± 3.0

Ash Content(%)

11.5 ±1.0

Weight Lost in 105℃ in 10min(%)

£ 2.0

Application Range

•HP-669C is a kind of multifunctional poly sulfur-silane coupling agent that has been used successfully in the rubber industry.
•HP-669C can be used in the vulcanized rubber system with fillers such as silica, fiberglass, talc powder, mica powder and clay as reinforcing agent. It can improve the reinforcing properties of fillers and rubber abrasive resistance properties.
•It is suitable to be used as rubber additive—vulcanizing agent and activator in polymers such as NR, IR, SBR, BR, NBR and EPDM.
•In the process of vulcanization, the crosslinking rate of poly sulfur alkyl is the same as deoxidizing rate of sulfur, so it act to resist deoxidizing of vulcanization of sulfur, and then improve dynamic bending properties such as heat build up and cracks expansion .The sulfur atoms can act as activator for vulcanization.
•In dynamic and static conditions, It is used for producing these rubber products: tire, hose, rubber roll, belting, cable, shoe and mechanical founding products. It can improve abrasive resistance, cutting resistance and pressure resistance, reduce hysteresis loss and hygroscopicity, improve mechanical and adhesive properties, and increase thermal ageing performance, modulus and flex life.
•Add sulfur-silane coupling agent in the industry of rubber tire, it’s not only debase the risk of puncture as temperature too high running on the high speed road or long time, but also reduce roll resistance of tire, then reduce the consume of gasoline, the emissions quantity of CO2 as to accord the environmental protection of carbon reduction.


Recommend dosage:1.0-6.0 PHR.

Package and storage

1.Package: 25kg, 50kg in paper vacuum bag. (PE bag inside).
2.Sealed storing:Keep in the cool, dry and well-ventilated place.
3.Storage life:Longer than one year in normal storing conditions.

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