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gamma-Mercaptopropyltrimethoxysilane.
Synonym: 3-Trimethoxysilypropylmercaptan

Countertype of Dynasylan MTMO, VPSi163, DowCorning Z-6062, ShinEtsu KBM-803, Wacker GENIOSIL GF 70, Silquest A-189

Chemical Structure

Introduction

DP-A189 is a bifunctional organosilane possessing a reactive organic mercapto and a hydrolyzable inorganic methoxysilyl group. KH-590 is a clear, colorless to light yellow liquid with a slightly mercaptan odor. It is soluble in alcohols, ketones and aliphatic or aromatic hydrocarbons.

Typical Physical Properties

Chemical Name:	3-Mercaptopropyltrimethoxysilane
CAS No.:	4420-74-0
EINECS No.:	224-588-5
Empirical Formula:	C₆H₁₆O₃Si
Molecular Weight:	196.4
Boiling Point:	212°C [760mmHg]
Flash Point:	88°C
Color and Appearance:	Water white to light straw liquid clear liquid
Density [25°C]:	1.057
Refractive Index [25°C]:	1.440
Purity:	Min.97.0% by GC

Applications

DP-A189 can be used as coupling agent to improve the adhesion of sulfur cured elastomers (polysulfide, polyurethane sealants) to inorganic fillers (such as silica, clay, glass, mica and talc etc.), fiberglass and surfaces. Mineral-reinforced articles such as shoe soles, rubber rollers and wheels, white sidewalls, and wire and cable insulation also can be produced with lower silane loadings.

DP-A189 can be used to improve properties of mineral filled elastomer, including modulus, tensile and tear strength, heat buildup, abrasion resistance, resilience, compression set and cure time.

DP-A189 can be used as a pretreatment on minerals or added at the time of compounding.

DP-A189 can be used to improve low-rolling resistance in silica-reinforced tire tread compounds.

Packing

Net weight 200Kg steel drum or 1000Kg IBC container