CAS No.: 77-58-7

Molecular Formula: C₃₂H₆₄O₄Sn

English Name: Dibutyltin dilaurate

Structural Formula: (CH₃CH₂CH₂CH₂)₂Sn [OCO (CH₂)₁₀CH₃]₂

Molecular Weight: 631.57

MDL No.: MFCD00008963

Beilstein No.: 4156980

EC No.: 201-039-8

UN No.: 2922

Applications

1. Polyvinyl Chloride (PVC) Processing

   As a highly effective heat stabilizer, dibutyltin dilaurate significantly enhances the thermal stability of PVC and prevents its degradation during high-temperature processing. It effectively captures and neutralizes hydrogen chloride (HCl) generated during PVC degradation, preserving the physical properties of PVC products and extending their service life. Additionally, it exhibits excellent lubricating properties, improving material flow in extruders or injection molding machines, reducing friction during processing, boosting production efficiency, and lowering energy consumption.

2. Polyurethane (PU) Industry

   Dibutyltin dilaurate is one of the commonly used catalysts in the synthesis of polyurethane foams. It accelerates the reaction between isocyanates and polyols, controls the foaming process, and ensures the uniformity and quality of the foam. In the production of rigid polyurethane foams, it produces a synergistic effect with amine-based catalysts, making it suitable for high-speed catalytic rigid foam manufacturing.

3. Organic Synthesis and Polymerization Reactions

   Dibutyltin dilaurate promotes various cross-linking reactions, such as cross-linking of acrylate rubber and carboxyl rubber, as well as transesterification in polyester synthesis. Furthermore, it acts as a catalyst for room-temperature vulcanized silicone rubber, accelerating the cross-linking rate of silicone rubber, shortening curing time, and improving production efficiency.

4. Other Applications

   Dibutyltin dilaurate is also used in the production of elastomers, sealants, coatings, and paints to enhance their processability and product performance. In environmental engineering, it serves as a catalyst in wastewater treatment to help remove harmful substances. In the electronics and semiconductor industry, it promotes the curing of epoxy resins and silicone rubber to form stable encapsulation layers that protect electronic components.