3-Octanoylthiopropyltriethoxysilane, or OPTS, is an organofunctional alkoxysilane compound. Its chemical formula is C15H32O3SSi and it has a CAS number of 220727-26-4.
OPTS belongs to a class of chemicals called organosilanes, which are silane compounds that contain carbon groups. OPTS specifically contains an octanoyl thio-propyl group attached to a triethoxysilane group. The organofunctional groups give organosilanes certain properties that make them useful for various applications.
OPTS is used as a coupling agent and is typically used for coupling inorganic materials like glass and ceramics with organic polymers. The alkoxysilane group of OPTS can react with hydroxyl groups on inorganic surfaces like glass to form siloxane bonds. Meanwhile, the organic functional groups can interact and mix with organic polymers. This dual reactivity makes OPTS useful as a coupling agent at the interface between inorganic and organic materials.
OPTS coupling agents can improve adhesion between organic polymers and inorganic substrates, increase moisture and chemical resistance of polymer coatings, and modify the surface properties of materials. OPTS is often used as an additive in polymer composites, coatings and sealants.
So in summary, 3-Octanoylthiopropyltriethoxysilane CAS No. 220727-26-4 is an organosilane coupling agent that can be used to improve adhesion and modify the properties of materials.