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Colorless Silane Coupling Agent KH-590 3 Mercaptopropyl Trimethoxysilane CAS NO 4420 74 0

Colorless Silane Coupling Agent KH-590 3 Mercaptopropyl Trimethoxysilane CAS NO 4420 74 0

Colorless Silane Coupling Agent KH-590 3 Mercaptopropyl Trimethoxysilane CAS NO 4420 74 0

Product Details:

Place of Origin: CHINA
Brand Name: LYRIN
Certification: SGS
Model Number: kh-590

Payment & Shipping Terms:

Minimum Order Quantity: Negotiation
Price: Negotiation
Packaging Details: 5L/Drum,20L/Drum,200L/Drum,1Mt/IBC drum
Delivery Time: 10-15 DAYS
Supply Ability: 300 MT MONTH
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Detailed Product Description
CAS No: 4420-74-0 EINECS No: 238-883-1
Appearance: Colorless To Light Yellow Clear Liquid. MF: HS(CH2)3Si(OCH3)3
Usage: Rubber Auxiliary Agents, Composite Material Type: Silane

3-Mercaptopropyltriethoxysilane CAS NO 4420-74-0 Silane Coupling Agent KH-590 ​




Chemical Name: 3-Mercaptopropyltriethoxysilane

1. Foreign Brand:

similar to Momentive: A-189,Y-9669

similar to Dow corning:SZ-6083
similar to Japan ShinEstu: KBM-573

Product description

Structural formula:


Empirical formula: C6H16O3SSi

Molecular weight: 196.34

CAS No.: 4420-74-0

Chemical name:

γ-Mercaptopropyl trimethoxysilane


LT-590 is a bifunctional organosilane possessing a reactive organic mercapto and a hydrolysable inorganic methoxysilyl group. The dual nature of its reactivity allows it to bind chemically to both inorganic materials (e.g. glass, metals, fillers) and organic polymers (e.g. thermoplastics, thermosets or elastomers) thus functioning as adhesion promoter, crosslinker agent, surface modifier or reactive reagent.

It is a clear, colorless liquid with a slightly mercaptan odor. It is soluble in alcohols, ketones and aliphatic or aromatic hydrocarbons.


Technical data

Typical characteristics Value
Appearance colorless transparent liquid
Purity ≥97.0%
Density at 25℃ 1.057g/ml
Boiling point at 760mmHg 93℃
Flash point 88℃
Refractive index (20℃) 1.440



In the presence of water, the methoxy groups of LT590 hydrolyze to form reactive silanol groups which can bond to a variety of inorganic substrates. The organophilic mercapto end of LT-590 can react with a suitable polymer. Hydrolysis of LT-590 is catalyzed by acids.

Examples of suitable inorganic substrates are glass, glass fibers, quartz, silicia, sand, cristobalite, mica kaolin, talc, other siliate fillers and metals.


Application and performance

KH-590 is used in applications such as:

² Glass composites: as a finish or a size ingredient.

² Glass and metal primer.

² Sealants and adhesives: as a primer, additive, or for chemical modification of the polymer.

² Mineral filled polymers: for pretreat- ment of fillers and pigments or as an additive.

Important product effects that can be achieved through the use of KH-590 include:

² Compression set.

² Improved mechanical properties, e.g. flexural strength, tensile strength, impact strength and modulus of elasticity, tear strength.

² Improved moisture and corrosion resistance.

² Improved electrical properties, such as dielectric constant, volume resistivity.

² Increased thermal resistivity.

KH-590 can also improve such processing properties as:

² Cure time

² Filler dispersion

² Rheological behavior: (e.g. viscosity reduction)

² Higher filler loading

Contact Details
Lyrin Industrial Corporation Limited

Contact Person: silicone

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