Stannous Octoate

I. Product Overview

Stannous Octoate (CAS: 301-10-0), commercially known as T-9, is a premium organotin catalyst engineered for precision in polymerization reactions. As a divalent tin compound, it uniquely combines catalytic acceleration with inherent anti-aging properties—oxidizing post-reaction to tetravalent tin, which stabilizes final products against degradation. Its low viscosity, high tin content, and compatibility with diverse resin systems make it a cornerstone for industries ranging from flexible foams to aerospace-grade epoxies.

II. Core Parameter Table

Indicator	Specification	Industry Significance
Appearance	Light yellow transparent liquid	Ensures homogeneous blending; no phase separation in formulations
Refractive Index (20℃)	1.490–1.500	Verifies chemical purity; deviations indicate impurities
Density (20°C, g/cm³)	1.23–1.27	Critical for accurate dosing in automated production lines
Viscosity (25°C, mPa·s)	≤380	Facilitates easy pumping/mixing; prevents air entrapment in resins
Stannous Tin (%)	≥27.25	Direct measure of active catalytic species; higher values boost efficiency
Total Tin (%)	≥28	Confirms minimal inorganic tin impurities (affects long-term stability)
Package	25kg plastic drum	Industrial-grade bulk packaging for large-scale operations

III. Application Fields and Mechanism

T-9’s versatility arises from its dual-function chemistry, enabling optimized performance across three key sectors:

A. Polyurethane Foams & Elastomers

In PU systems, T-9 accelerates both isocyanate-water (blowing) and isocyanate-polyol (gelling) reactions. Unlike monovalent tin catalysts, its divalent structure provides controlled reactivity—preventing over-curing while ensuring uniform cell structure in foams. Post-foaming, T-9 oxidizes to tetravalent tin, acting as an internal anti-aging agent that enhances thermal stability and flexural fatigue resistance. When blended with dibutyltin dilaurate (DBTL), synergy emerges: cure times shorten by 15–25%, and mechanical properties (tensile strength, elongation) improve by 10–18%.

B. Epoxy Resin Systems

As a hardener/catalyst in epoxy formulations, T-9 outperforms DBTL in cure speed and crosslink density. It enables rapid room-temperature curing (full cure in 24–48 hours vs. 72+ hours for DBTL alone), ideal for coatings, adhesives, and encapsulants. Its low viscosity (<380 mPa·s) ensures seamless blending with resins, minimizing bubbles and surface defects.

C. Room-Temperature Vulcanized (RTV) Silicone Rubber

In RTV silicones, T-9 promotes fast vulcanization while suppressing premature crosslinking. This results in consistent Shore hardness (±2 points batch-to-batch) and enhanced UV resistance—critical for automotive seals and construction adhesives.

IV. Storage and Transportation Guidelines

Preserve T-9’s efficacy through strict environmental controls:

Temperature: Store at 10–30°C. Avoid extremes (<5°C causes crystallization; >35°C accelerates decomposition).
Humidity: Maintain relative humidity <60%. Moisture hydrolyzes stannous tin, reducing catalytic activity.
Containment: Seal drums tightly; use nitrogen blanketing for long-term storage.
Handling: Wear PPE (gloves, goggles) during transfer—skin contact may cause irritation. Do not mix with oxidizers or acids (risk of exothermic reactions).

V. Technical Support and Custom Solutions

For troubleshooting (e.g., cure inconsistencies, foam collapse) or optimization (cost reduction, performance enhancement), contact Shijiazhuang Qihong Technical Service. We offer:

Free lab-scale trials to validate T-9’s suitability for your formulation.
Custom blends (e.g., T-9 + DBTL ratios) tailored to your process parameters.
On-site process audits to identify bottlenecks in PU/epoxy production lines.

T-9’s balance of catalytic power, anti-aging benefits, and broad compatibility makes it indispensable for high-performance polymers. Whether scaling up PU foam production or developing next-gen epoxy composites, trust T-9 to deliver consistent results and extend product lifespan.