Abstract
3-Mercaptopropyltrimethoxysilane (CAS No. 4420-74-0), silane coupling agent KH-590, is a versatile mercapto functional silane suitable to promote the adhesion between fillers such as silica and sulfur crosslinked rubber such as NR, SBR, BR, EPDM and etc.

Identification
Name: 3-Mercaptopropyltrimethoxysilane
Synonyms: Trimethoxysilylpropanethiol
Molecular Formula  : C6H16O3SSi
Molecular Weight: 196.34
CAS Registry Number: 4420-74-0
EINECS: 224-588-5

Equivalents
Momentive (formerly OSi Specialties ) Silquest A-189
Dow Corning Z-6062  
ShinEtsu KBM-803  
EVONIK Degussa Dynasylan MTMO  
Wacker GENIOSIL GF 70
Chisso Sila-Ace S810
UCT Specialties (formerly Petrarch) M8500

Properties
Density: 1.057
Boiling point: 93 C degree
Refractive index: 1.440
Flash point: 88 C degree
Water solubility: REACTS

Application
3-Mercaptopropyltrimethoxysilane (CAS No. 4420-74-0), silane coupling agent KH-590, can improve the properties of the mineral-filled elastomer, including modulus, tensile and tear strength, heat buildup, abrasion resistance, resilience, compression set and cure time may be achieved with KH-590. This silane chemically bonds reinforcing minerals such as silica, clay, mica and talc to the polymer matrix especially the sulfur-cured and metal oxide-cured rubber and elastomer. It can be used as a pretreatment on minerals or added at the time of compounding. Mineral-reinforced rubbers such as shoe soles, rollers, wheels, white sidewalls, wire and cable insulation are the common case KH-590 could be used in.