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  • Mercaptopropyltrimethoxysilane IOTA-80

    3-Mercaptopropyltrimethoxysilane IOTA-80

    Molecular construction: HS(CH2)3Si(OCH3)3

    Product Article: IOTA-80

    Introduction

    3-Mercaptopropyltrimethoxysilane is a water-white to light straw liquid. It is a mercapto-functional silane that finds use as a coupling agent in polysulfide and polyurethane caulks and sealants.

    It is especially useful in sulfur-cured and metal oxide-cured elastomers. Chemically bonding reinforcing minerals like silica, clay, mica and talc to the polymer matrix, properties including modulus, tensile and tear strength, heat buildup, abrasion resistance, resilience, compression set and cure time are improved in mineral-filled elastomers.

    It can be used as a pretreatment on minerals or added at the time of compounding. Being a rather efficient and fast sulfur containing silane, typically lower silane loading levels are used.

    Physical Properties:

    Chemical Name: gamma-Mercaptopropyltrimethoxysilane

    Formula: C6H16O3SSi

    Molecular Weight: 196.4

    Boiling Point: 93℃(5.3 KPa)

    Refractive Index: 1.4400 (25℃)

    Density 25℃: 1.051

    Flash point: 48℃

    Purity: Min 97.0%

    CAS No.: 4420-74-0

    EINECS No.: 224-588-5

    Solubility:

    3-Mercaptopropyltrimethoxysilane silane is soluble in methanol, ethanol, isopropanol, mineral spirits, acetone, benzene, toluene, xylene, and in water when suitable hydrolysis procedures are followed.

    Applications:

    Improved or equal performance is low-rolling resistance silica reinforced tread compounds can be achieved at lower silane loading levels when 3-Mercaptopropyltrimethoxysilane is substituted for commonly used polysulfide type silanes. Mineral-reinforced articles such as shoe soles, rubber rollers and wheels, white sidewalls, and wire and cure accelerator systems and increased sulfur-donor concentrations may be necessary when 3-Mercaptopropyltrimethoxysilane is substituted for slower cure-rate polysulfide-type silanes.



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