Dibutyltin oxide

Dibutyltin oxide (CAS 818-08-6) is an organotin compound used as a catalyst and reactive intermediate across polymer processing and surface coating industries. It drives esterification, transesterification, and condensation reactions where precise control over cure rate is required.

In polyurethane and silicone sealant formulations, it functions as a curing catalyst, controlling gel time and final mechanical properties of the elastomeric network. Coating manufacturers use it to catalyze alkyd and polyester resin synthesis.

The material accelerates esterification without discoloring the final film, ensuring high clarity in finished products. In PVC stabilizer production, it serves as a precursor to dibutyltin carboxylates and mercaptides, which are active heat stabilizer species.

Adhesive formulators working with moisture-cure systems also rely on it to regulate cross-linking speed in structural bonding applications. This versatility makes it a staple in the production of high-performance industrial adhesives and sealants.

Dibutyltin oxide is supplied as a white to off-white powder. Technical grade is the standard commercial form, with purity specifications typically ranging from 95% to 98%+ depending on the intended downstream synthesis or direct catalytic use.

Packaging is available in multi-kilogram bags through to bulk quantities suited for industrial-scale polymer and coating operations. This ensures reliable supply chains for large-scale manufacturing facilities requiring consistent chemical performance.