Thiocyanato Silane Coupling Agent, HP-264/Si-264 (Degussa), CAS No. 34708-08-2, 3-Thiocyanatopropyltriethoxysilane

Short Description:

Product Detail

Product Tags

Chemical Name


Structural Formula


Equivalent Product Name

Si-264 (Degussa),

CAS Number


Physical Properties

An amber-colored liquid with typical odor and soluble in all common organic solvents and insoluble in water, but hydrolyze when contact with water or moisture. Its molecular weight is 263.4.


HP-264 Content

≥ 96.0 %

Chlorine Content

≤0.3 %

Specific Gravity (25℃)

1.050 ± 0.020

Refractive Index (25℃)

1.440 ± 0.020

Sulfur content

12.0 ± 1.0 %

Application Range

•HP-264 is able 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 HP-264 in polymers such as NR, IR, SBR, BR, NBR, and EPDM.
•Similar to HP-669, which has already been used successfully in the rubber industry, HP-264 improves 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.


Recommend dosage︰1.0-4.0 PHR.

Package and storage

1.Package: 25kg,, 200kg or 1000 kg in plastic drum.
2.Sealed storing︰Keep in cool, dry and well-ventilated places.
3.Storage life︰Longer than two years in normal storing conditions.

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