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TIB KAT 320 offers controlled reactivity, low discoloration, and good compatibility with other additives and systems.
TIB KAT 320 is often used when manufacturers require a replacement or enhancement of DBTDL due to performance, toxicity, or regulatory concerns.
CAS Number: 77-58-7
Synonyms:
DBTDL,Dibutyltin bis(laurate),Tin, dibutylbis(laurate),Stannane, dibutyloxo-, laurate
Introduction
Organotin catalysts such as TIB KAT 320 play a vital role in accelerating curing reactions in the polyurethane and silicone industries.
This article provides a detailed overview of TIB KAT 320’s chemical nature, applications, and industrial relevance, emphasizing its catalytic efficiency and compatibility.
Chemical Structure & Composition
TIB KAT 320 is based on dibutyltin moieties with fatty acid ligands, typically dibutyltin dilaurate derivatives.
The active tin center facilitates urethane bond formation by coordinating isocyanate groups, crucial in polymerization processes.
Physical and Chemical Properties
Appearance: Clear to pale yellow liquid
Density: ~1.05 g/cm³
Solubility: Organic solvents such as toluene and acetone
Thermal Stability: Stable under storage; decomposes above 250°C
Synthesis and Manufacturing
Synthesis involves reacting dibutyltin oxide or dichloride with fatty acids, followed by purification to ensure high catalytic activity and consistency.
CAS Number and Regulatory Status
The base compound dibutyltin dilaurate holds CAS number 77-58-7.
TIB KAT 320’s exact CAS may be proprietary but generally falls under organotin catalyst regulations internationally.
Mechanism of Action
TIB KAT 320 catalyzes urethane formation by increasing isocyanate electrophilicity, accelerating the reaction with polyol hydroxyl groups.
It also catalyzes moisture curing via isocyanate-water reactions producing urea linkages.
Applications in Polyurethane Chemistry
Flexible and rigid foams
Coatings, adhesives, sealants, and elastomers (CASE)
Silicone curing applications
Performance Characteristics
High catalytic efficiency at low concentrations
Controlled reactivity minimizing side reactions
Thermal stability for diverse processing conditions
Compatibility with various polyols and isocyanates
Comparison with Other Catalysts
Compared to dibutyltin dilaurate and other organotin catalysts, TIB KAT 320 offers optimized activity and processing benefits, such as better cure control and stability.
Storage & Handling
Store in moisture-free, cool, ventilated conditions
Protect from acids and excessive heat
Use corrosion-resistant packaging
Industrial Use Cases
Automotive coatings with superior hardness and gloss
Flexible foams for furniture and mattresses with precise density control
Silicone sealants with accelerated cure times
Recent Research and Developments
Research focuses on improving catalyst formulations for enhanced efficiency and broader application scope while maintaining processing advantages.
Regulatory Compliance
TIB KAT 320 complies with regulations such as REACH and GHS classification pertinent to organotin compounds, ensuring market acceptance and safe industrial usage.
Degradation and Stability
Maintains catalytic activity under normal storage; exposure to moisture and acids leads to degradation impacting efficiency.
Analytical Methods for Detection
GC-MS for organic component analysis
ICP-MS or atomic absorption spectroscopy (AAS) for tin quantification
Infrared spectroscopy for structural monitoring
Future Trends
Anticipated trends include development of catalysts with improved selectivity, recyclability, and compatibility with bio-based polyols and isocyanates.
Conclusion
TIB KAT 320 is a highly effective organotin catalyst that enhances polyurethane and silicone curing with excellent performance and stability, making it indispensable in various industrial polymer applications.
SAFETY INFORMATION ABOUT TIB KAT 320
First aid measures:
Description of first aid measures:
General advice:
Consult a physician.
Show this safety data sheet to the doctor in attendance.
Move out of dangerous area:
If inhaled:
If breathed in, move person into fresh air.
If not breathing, give artificial respiration.
Consult a physician.
In case of skin contact:
Take off contaminated clothing and shoes immediately.
Wash off with soap and plenty of water.
Consult a physician.
In case of eye contact:
Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician.
Continue rinsing eyes during transport to hospital.
If swallowed:
Do NOT induce vomiting.
Never give anything by mouth to an unconscious person.
Rinse mouth with water.
Consult a physician.
Firefighting measures:
Extinguishing media:
Suitable extinguishing media:
Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
Special hazards arising from the substance or mixture
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas
Advice for firefighters:
Wear self-contained breathing apparatus for firefighting if necessary.
Accidental release measures:
Personal precautions, protective equipment and emergency procedures
Use personal protective equipment.
Avoid breathing vapours, mist or gas.
Evacuate personnel to safe areas.
Environmental precautions:
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
Methods and materials for containment and cleaning up:
Soak up with inert absorbent material and dispose of as hazardous waste.
Keep in suitable, closed containers for disposal.
Handling and storage:
Precautions for safe handling:
Avoid inhalation of vapour or mist.
Conditions for safe storage, including any incompatibilities:
Keep container tightly closed in a dry and well-ventilated place.
Containers which are opened must be carefully resealed and kept upright to prevent leakage.
Storage class (TRGS 510): 8A: Combustible, corrosive hazardous materials
Exposure controls/personal protection:
Control parameters:
Components with workplace control parameters
Contains no substances with occupational exposure limit values.
Exposure controls:
Appropriate engineering controls:
Handle in accordance with good industrial hygiene and safety practice.
Wash hands before breaks and at the end of workday.
Personal protective equipment:
Eye/face protection:
Tightly fitting safety goggles.
Faceshield (8-inch minimum).
Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).
Skin protection:
Handle with gloves.
Gloves must be inspected prior to use.
Use proper glove
removal technique (without touching glove's outer surface) to avoid skin contact with this product.
Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices.
Wash and dry hands.
Full contact:
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
Splash contact
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
It should not be construed as offering an approval for any specific use scenario.
Body Protection:
Complete suit protecting against chemicals, The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace.
Respiratory protection:
Where risk assessment shows air-purifying respirators are appropriate use a fullface respirator with multi-purpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls.
If the respirator is the sole means of protection, use a full-face supplied air respirator.
Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU).
Control of environmental exposure
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
Stability and reactivity:
Chemical stability:
Stable under recommended storage conditions.
Incompatible materials:
Strong oxidizing agents:
Hazardous decomposition products:
Hazardous decomposition products formed under fire conditions.
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas.
Disposal considerations:
Waste treatment methods:
Product:
Offer surplus and non-recyclable solutions to a licensed disposal company.
Contact a licensed professional waste disposal service to dispose of this material.
Contaminated packaging:
Dispose of as unused product
