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3-Mercaptopropyltriethoxysilane In Polysuflide And Polyurethane For Sealants

1891 Silane Coupling Agent

Product Name: 3-Mercaptopropyltriethoxysilane

Chemical Formula : C9H22O3SSi

Physical Properties: Silane coupling agent Crosile-1891 is a colorless clear liquid with light typical odor and soluble easily in ethyl alcohol, acetone,benzene, toluene etc.

Insoluble in water.


A-1891, Z-6910 (Z-6911), KBM-803, 3201, KH-580


Target Values(Spec,Limits)
Alcohol content
Crosile-1891 Content
Other impurity content
Specific Gravity (25°C)
0.960 – 1.000
Refractive Index (25°C)
1.410 – 1.450
Silane Coupling Agent Crosile 1891 
Mercapto-functional silane used as a coupling agent in polysuflide and polyurethane caulks and sealants.
Useful in sulfur-cured and metal oxide-cured elasomers;
Can be either added at the time of compounding or used to pretreat minerals before hand.
Lower levels of this sulfur containing silane are used since it is efficient and fast
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.