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    Qingdao Hengda New Material Technology Co., Ltd.

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    Qingdao International Innovation Park, Qingdao, Shandong Province, China

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    Gaizhou Hengda Chemicals Co., Ltd.

    Shandong Hengda Silicon Material Technology Co., Ltd.

HENGDA-M4133 - 3-Mercaptopropyltrimethoxysilane

KH-590
HENGDA-M4133

3-Mercaptopropyltrimethoxysilane is a chemical compound often used as a coupling agent and surface modifier in various industrial applications. It belongs to the group of organosilanes, which are molecules that have both organic groups and reactive silicon-oxygen bonds.
Its chemical structure includes a trimethoxysilane group (Si (OCH₃)₃) attached to a three-carbon chain with a terminal thiol (-SH) group. This structure enables it to bind strongly to surfaces like glass, metals, and polymers, imparting desirable properties such as enhanced adhesion, corrosion resistance, and durability.

  • Chemical Name:

    3-Mercaptopropyltrimethoxysilane

  • CAS No.

    4420-74-0

  • Equivalent Name:

    A-189

  • GF 70

Typical Properties

Appearance

Colorless transparent liquid

Purity(%)≥98%

Density(ρ20), g/cm³

1.0570~1.0610

Molecular Weight

196.34

Refractive Index(n²⁵D)

1.4410~1.4430


Applications

1.3-Mercaptopropyltrimethoxysilane is widely used in natural and synthetic rubber, as a reinforcing agent and crosslinking accelerator., suitable for NR, EPDM, SBR, polysulfide rubber, styrene-butadiene rubber, nitrile rubber, neoprene and polyurethane rubber, etc.

2.It can be used in composite materials (eg. resin glass fiber composites), coatings, inks glues and sealing materials, etc.

3.3-Mercaptopropyltrimethoxysilane is often used to treat inorganic fillers such as glass fiber, SiO2, quartz, talc, mica, act as an activator, coupling agent, crosslinking agent, and reinforcing agent in polymers such as rubber and silicone rubber.

4.The mercapto functional group gives it special effects as an antirust agent on metal surfaces, used to treat the surface of gold, silver, copper and other metals to improve their corrosion resistance, oxidation resistance and improve its bonding performance to polymer materials.


Packing

25kg, 200kg plastic or iron drum, IBC drum



HENGDA-M4133