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TIB KAT 417 is a proprietary organotin-based catalyst, commonly used in polyurethane production and related chemical reactions, such as isocyanate-polyol and isocyanate-water reactions.
It is supplied by TIB Chemicals AG.
Synonyms
Organotin catalyst,Tin-based polyurethane catalyst,Dialkyltin carboxylate (general class), Stannous or stannic catalysts
Introduction
1.1 Organotin Catalysts in Polyurethane Chemistry
Organotin compounds have long been recognized as highly effective catalysts in the polyurethane (PU) industry.
Their unique ability to accelerate the reaction between isocyanates and polyols, or isocyanates and water, makes them invaluable for manufacturing various PU products, including flexible and rigid foams, elastomers, coatings, adhesives, and sealants.
Organotin catalysts often provide superior catalytic activity at relatively low concentrations and operate efficiently under a wide range of conditions.
Overview of TIB Chemicals AG and TIB KAT Product Line
TIB Chemicals AG is a leading specialty chemicals company that offers a broad portfolio of catalysts tailored for polyurethane production.
Their TIB KAT series includes numerous organotin-based catalysts, each designed to optimize specific reaction pathways and PU formulations.
TIB KAT 417 is one such catalyst, formulated for enhanced catalytic activity in select PU systems, noted for its stability and effectiveness.
Aim and Scope
This article aims to provide an in-depth review of TIB KAT 417, exploring its chemical nature, synthesis, catalytic mechanism, applications, performance, safety, and regulatory aspects.
The discussion will include comparisons to other organotin catalysts, analytical characterization, and future trends in PU catalysis.
Chemical Composition and Structure
Organotin Compound Classes
Organotin compounds consist of tin atoms covalently bonded to organic groups.
Common organotin catalysts used in PU production typically belong to the dialkyltin carboxylate category, where tin is coordinated with alkyl groups and carboxylate ligands.
The most prevalent oxidation state of tin in these catalysts is +4 (stannic), but stannous (tin(II), +2) species are also known.
Probable Chemical Structure of TIB KAT 417
While the exact proprietary formulation of TIB KAT 417 is confidential, based on publicly available information and industry standards, it likely contains a dialkyltin dicarboxylate structure, such as dibutyltin dilaurate (DBTDL) analogues or derivatives.
These catalysts generally feature two tin-carbon bonds and two tin-carboxylate bonds, forming a stable coordination complex that is soluble in organic polyol media.
Ligand Effects and Catalyst Stability
The nature of the carboxylate ligands influences the solubility, reactivity, and thermal stability of the catalyst.
Long-chain fatty acid ligands, such as laurate or octoate, provide hydrophobic character and compatibility with PU formulations.
The steric and electronic properties of the ligands affect catalytic efficiency and resistance to hydrolysis.
Tin Oxidation States and Coordination Environment
The tin center typically adopts a tetrahedral geometry, coordinating to two alkyl groups and two oxygen atoms from carboxylate ligands.
This geometry facilitates interaction with isocyanate groups during catalysis. Minor structural variations can lead to significant differences in catalytic behavior.
Synthesis and Manufacturing
General Synthetic Routes for Organotin Catalysts
Organotin catalysts like TIB KAT 417 are commonly synthesized via the reaction of dialkyltin dihalides with sodium salts of fatty acids or carboxylic acids.
The process involves ligand exchange, precipitation of sodium halide, and purification steps. Controlled reaction conditions ensure high purity and consistent catalytic activity.
Industrial Production Considerations
Manufacturing TIB KAT 417 at industrial scale requires precise control of temperature, stoichiometry, and reaction time to avoid byproducts and ensure product consistency.
The final product is usually formulated in liquid form, sometimes with additives to enhance shelf life or compatibility.
Purity, Formulation, and Stabilization
Purity levels are critical for catalyst performance; impurities such as free acids or halides can reduce activity or cause unwanted side reactions.
Stabilizers or antioxidants may be added to improve the shelf life, particularly under ambient storage conditions.
Physical and Chemical Properties
Physical State and Appearance
TIB KAT 417 is typically a clear to slightly colored viscous liquid at room temperature, soluble in polyols and many organic solvents.
Its viscosity and density depend on the exact formulation and ligand composition.
Thermal Stability and Decomposition
Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) studies show that organotin catalysts like TIB KAT 417 remain stable up to temperatures of around 200–250°C. Decomposition releases tin oxides and organic fragments; therefore, processing temperatures in PU manufacturing are usually kept below this range.
Solubility and Compatibility
High solubility in common polyols and compatibility with isocyanates is essential for uniform catalytic action. TIB KAT 417 exhibits excellent miscibility in typical PU raw materials, enabling even dispersion in reaction mixtures.
Chemical Reactivity
The catalyst readily coordinates with isocyanate groups, facilitating urethane bond formation.
It also promotes the reaction of isocyanates with water, generating carbon dioxide and forming polyurethane foams.
SAFETY INFORMATION ABOUT TIB KAT 417
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
