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TIB KAT 250 is an organotin catalyst, with the chemical name monobutyltin(IV) dihydroxychloride and the CAS number 13355-96-9.
TIB KAT 250 is a white, amorphous (non-crystalline) powder that is primarily used in chemical reactions such as esterification, transesterification, and polycondensation.
TIB KAT 250 also known as Butyltin chloride dihydroxide, butyl(chloro)stannanediol, is one of several organotin compounds which are active as an esterification catalysts at a temperature range of 200-230 °C.
CAS Number: 13355-96-9
Molecular Formula: C4H11ClO2Sn
Molecular Weight: 245.29
EINECS Number: 236-406-1
Synonyms: 13355-96-9, Stannane, butylchlorodihydroxy-, Butyltin chloride dihydroxide, Butylchlorotin dihydroxide, Butylchlorodihydroxystannane, Butyl(chloro)stannanediol, butylchlorostannanediol, FWL74QMO8F, EINECS 236-406-1, NSC 323990, NSC-323990, BUTYLTIN DIHYDROXYCHLORIDE, DTXSID4044797, DTXCID2024797, 236-406-1, Butylchlorodihydroxytin, BUTYLTINCHLORIDEDIHYDROXIDE, butyl(chloro)tin;dihydrate, UNII-FWL74QMO8F, Butylchlorodihdroxytin, SCHEMBL37214, butyl tin chloride dihydroxide, Butyltin chloride dihydroxide, 96%, MFCD00015822, NSC323990, AKOS015910163, AS-58027, NS00053350, F87433, Stannane, butylchlorodihydroxy-, Butylchlorostannanediol, Butyldihydroxychlorostannane, Dihydroxychlorobutylstannane, Butylchlorodihdroxytin, Butyltin chloride dihydroxide,Butylchlorodihydroxystannane, butyl(chloro)tin dihydrate, FASCAT 4101 (Monobutyltin dihydroxychloride).
TIB KAT 250 is a non-acidic white solid which has C4H11ClO2Sn as chemical formula.
TIB KAT 250 dissolves by reaction on heating with alcohols or carboxylic acids.
The resulting active is soluble in ester systems and remains in the ester product.
These types of reactions are crucial in the production of saturated and unsaturated polyester resins, as well as alkyd resins, which are commonly used in the coatings and plastics industries.
TIB KAT 250 is a high-performance organotin catalyst that plays a vital role in several industrial chemical processes, especially those involving the synthesis of polymer resins such as polyesters and alkyd resins.
The catalyst is chemically known as monobutyltin(IV) dihydroxychloride, a compound that contains tin (Sn) in its +4 oxidation state, along with hydroxyl and butyl groups, which help in enhancing its catalytic activity.
This catalyst is supplied in the form of a white amorphous powder, which means it does not have a fixed crystalline structure.
TIB KAT 250 is designed to be easily handled, accurately dosed, and highly efficient, even when used in very small concentrations, typically between 0.01% and 0.5% of the total weight of the formulation.
This low dosage makes it cost-effective, while still delivering excellent catalytic performance.
One of the main advantages of TIB KAT 250 is its thermal stability, as it remains effective in reaction temperatures ranging from 90 °C up to 280 °C.
This wide temperature range gives manufacturers greater flexibility in choosing processing conditions, particularly in applications like high-temperature polycondensation used in resin production.
The catalyst is highly efficient and typically used in small concentrations—between 0.01% and 0.5% of the total reaction mixture.
TIB KAT 250 is active in a wide temperature range, usually between 90 °C and 280 °C, depending on the specific application.
TIB KAT 250 is an amorphous organotin catalyst. TIB KAT® 250 is used in paints and coatings.
TIB KAT 250 can signicantly shorten esterication times, oers energy savings due to lower reaction temperatures, with a consequent more ecient use of equipment.
TIB KAT 250 minimizes side reactions such as dehydration and oxidative degradation of polyhydric alcohols, especially secondary alcohols.
TIB KAT 250 can be charged up front with other reactants, and requires no special handling other than avoiding excessive exposure to moisture.
Organotin compounds are an important product of tin deep processing, with the characteristics of various varieties and wide applications, and TIB KAT 250 is the fastest growing eld of tin consumption.
Organotin products are used as heat stabilizers in plastic processing industries such as PVC, and have been widely used in industrialization.
TIB KAT 250 is a fastest liquid catalyst.
It is suitable for synthesis of polyurethane systems and condensation reactions of RTV silicone resins and silanes.
TIB KAT 250 is slightly sensitive to moisture and exhibits higher catalytical activity across various applications.
TIB KAT 250 is also used in transesterification reactions of polyacrylates.
TIB KAT 250 has a shelf life of 1 year.
Melting point: 150 °C (dec.)(lit.)
Boiling point: 243.2 ± 23.0 °C (Predicted)
Density: 1.26 g/cm³
Vapor pressure: 0.061 Pa at 20 °C
Storage temp.: Store below +30 °C
Solubility: 1.03 mg/L in organic solvents at 20 °C
Form: Solid
pKa: 2.98 ± 0.70 (Predicted)
Specific Gravity: 1.26
Water Solubility: 1.03 mg/L at 20 °C
Hydrolytic Sensitivity: 4: no reaction with water under neutral conditions
InChIKey: FQYHHEJETOLDHR-UHFFFAOYSA-K
LogP: 0.35 at 20 °C
TIB KAT 250 is particularly effective in esterification reactions, where it speeds up the chemical combination of alcohols and acids to form esters, which are the building blocks of many synthetic materials.
It also performs very well in transesterification reactions, which involve the exchange of ester groups between molecules — a common step in producing plasticizers, biodiesel, and other specialty chemicals.
Furthermore, this catalyst is commonly used in polycondensation reactions, especially for the manufacture of saturated and unsaturated polyester resins and alkyd resins.
These materials are widely used in the coatings, adhesives, plastics, and composites industries, where performance, durability, and chemical resistance are essential.
In short, TIB KAT 250 is a specialized chemical that speeds up important industrial reactions, especially in the production of polymer materials.
TIB KAT 250 is chosen for its effectiveness, stability at high temperatures, and its lead-free composition, making it a preferred choice in modern, environmentally conscious manufacturing.
TIB KAT 250 is that it is a lead-free catalyst, which makes it a safer and more environmentally friendly alternative to older tin-based or lead-based catalysts that pose health and environmental risks.
It complies with stricter international regulations concerning heavy metal usage, such as those found in REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) and RoHS (Restriction of Hazardous Substances).
TIB KAT 250 is an amorphous white solid phase transfer catalysts.
TIB KAT 250 is hydrolytically stable and can be used in the synthesis of saturated polyester resins for powder coatings and coil coatings, as well in the production of unsaturated polyester resins for gel-coat, sheet molding, and cast molding applications.
TIB KAT 250 might be used also to produce polymeric plasticizers.
Uses:
TIB KAT 250 is a highly versatile catalyst that finds extensive use in chemical industries where ester formation, polymer synthesis, and resin curing are essential.
TIB KAT 250 is especially valued for its effectiveness at low concentrations, thermal stability, and environmentally responsible composition, making it ideal for modern industrial applications in coatings, adhesives, resins, and plastics.
TIB KAT 250 is an amorphous, hydrolytically stable butyl tin chloride dihydroxide.
It can be used for esterification, polycondensation and transesterification reactions.
The catalyst is used to synthesize saturated polyester resin for powder coatings. Other uses include: production of unsaturated polyester resins for gel coat, sheet molding, and cast molding applications, in transesterification reactions run at temperatures between 140-180°C to produce esters and anti-oxidants, in the production of PBT engineering resins for the automotive and construction markets.
TIB KAT 250 is widely used as a catalyst in esterification reactions, which involve the chemical reaction between carboxylic acids and alcohols to produce esters and water.
These esters are fundamental components in the synthesis of various polymeric resins, plasticizers, and solvents.
The catalyst significantly accelerates the reaction rate while also helping to drive the reaction toward completion by increasing the efficiency of water removal or conversion at elevated temperatures.
Another common use of TIB KAT 250 is in transesterification processes, where one ester group is exchanged for another by reacting an ester with an alcohol.
This type of reaction is essential in the production of biodiesel, where triglycerides from vegetable oils or animal fats are converted into fatty acid methyl esters (FAMEs), and in the manufacturing of phthalate and adipate plasticizers.
The organotin catalyst enhances reaction selectivity and promotes higher yields under controlled thermal conditions.
TIB KAT 250 serves a crucial role in the polycondensation of saturated and unsaturated polyester resins, which are formed by the step-growth polymerization of dicarboxylic acids (or anhydrides) with polyols.
These polyesters are used in a broad range of products such as fiberglass-reinforced plastics, gel coats, automotive parts, and marine composites.
The catalyst ensures consistent molecular weight development and improves the structural properties of the resulting polymers.
In the alkyd resin industry, TIB KAT 250 is employed to catalyze the polycondensation between polyols (like glycerol or pentaerythritol), dibasic acids, and monobasic fatty acids or oils.
Alkyd resins are widely used in paints, varnishes, and wood coatings due to their excellent adhesion, gloss, and durability.
The catalyst not only accelerates resin formation but also helps control the viscosity and molecular structure, which are critical for paint performance.
TIB KAT 250 is often found in coating systems, where it promotes faster curing and cross-linking of resins during the drying or baking process.
In adhesives, especially heat-cured thermoset adhesives, it improves bonding strength and chemical resistance.
Because of its high thermal stability and catalytic activity over a broad temperature range, it is especially useful in high-performance coatings for metal, plastic, and composite surfaces.
TIB KAT 250 is increasingly used as a safer, lead-free alternative to traditional metal-based catalysts such as dibutyltin dilaurate (DBTDL) and lead octoate.
This makes it suitable for use in formulations that must comply with modern environmental and safety standards, including RoHS, REACH, and other global regulatory frameworks aimed at reducing hazardous substances in manufacturing.
Safety Profile:
When inhaled, the dust or fumes of TIB KAT 250 may be toxic to the respiratory system, potentially causing irritation or more serious effects depending on exposure levels; therefore, adequate ventilation or respiratory protection is strongly recommended
If the substance comes into contact with the skin, it can be absorbed through the skin, potentially causing systemic toxicity and irritation; consequently, protective gloves and clothing should always be worn during handling .
Ingestion of this compound should be avoided at all costs because it is classified as harmful if swallowed, which could lead to significant adverse effects on internal organs
This organotin compound may undergo hydrolysis in moist or acidic conditions, releasing corrosive hydrogen chloride (HCl), which can damage metals, equipment, and biological tissues
Like many organotins, monobutyltin compounds show toxicity to aquatic organisms, especially insects, algae, and fish, and can bioaccumulate in ecosystems; users must take care to prevent environmental contamination
