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TIB KAT 248 LC is the enhanced, special-grade formulation of standard TIB KAT 248 LC; it delivers all the catalytic strengths of dibutyltin oxide but with higher purity and reduced turbidity, making it ideal for clear polyester and alkyd resin production.
TIB KAT 248 LC is applied in the formulation of ame-retardant materials, where it aids in the production of polymers that meet reresistance standards for safety-critical applications.
TIB KAT 248 LC is employed in the production of gel formulations, where it helps control the polymerization process, ensuring a smooth, consistent texture in gels used in personal care and medical products.
CAS Number: 818-08-6
Molecular Formula: C₈H₁₈OSn
Molecular Weight: 248.94 g/mol
EC Number: 212-449-1
Synonyms: Dibutyltin oxide, 818-08-6, Dibutyloxotin, Stannane, dibutyloxo-, Dibutyloxostannane, Dibutylstannane oxide, Dibutyltin(IV) oxide, Tin, dibutyloxo-, Dibutyloxide of tin, Dibutylstannium oxide, Di-n-butyl-zinn-oxyd, dibutylstannanone, Tin, dibutyl-, oxide, dibutyl(oxo)stannane, Kyslicnik di-n-butylcinicity, Di-n-butyl-zinn-oxyd [German], EINECS 212-449-1, Kyslicnik di-n-butylcinicity [Czech], NSC 28130, UNII-T435H74FO0, BRN 4126243, T435H74FO0, NSC-28130, DIBUTYLTIN OXIDE [MI], DTXSID4027315, EC 212-449-1, DTXCID607315, 212-449-1, dibutyl(oxo)tin, DI-N-BUTYLTIN OXIDE, DBOT, Dibutyltinoxide, MFCD00001992, dibutyl tinoxide, di-butyltin oxide, dibutyl tin oxide, dibutyl-tin-oxide, di-butyl tin oxide, dibutyl(oxo)stannum, di-n-butyltin-oxide, di-n-butyl tin oxide, dibutyltin (IV) oxide, di-n-butyl(oxo)stannane, dibutyl(oxidanylidene)tin, SCHEMBL15123, Dibutyltin(IV) oxide, purum, Dibutyltin(IV) oxide, 98%, WLN: O-SN-4&4, NSC28130, AKOS015839513, NCGC00164074-01, NCI60_002289, DB-056553, NS00042353, D95293, EN300-6482113, A840199, Q2677909, F0001-2101
TIB KAT 248 LC is used in the production of specialty adhesives for industrial applications, where it helps improve the polymerization process to produce strong, reliable bonds.
This catalyst excels in polycondensation, esterification, and transesterification reactions, performing notably well where visual clarity and minimal haze are critical, such as in coatings, clear finishes, and resin systems derived from vegetable oils.
TIB KAT 248 LC is applied in the production of biodegradable polymers, where it helps polymerize renewable feedstocks, leading to the creation of sustainable materials with desirable properties.
TIB KAT 248 LC is used in the manufacture of polymeric bers, where it aids in the polymerization process to create materials with high strength, toughness, and desired texture.
TIB KAT 248 LC is formulated to combine outstanding catalytic performance with a high level of purity, delivering minimal turbidity when used—especially important in polyester systems produced from soy oils or other vegetable oils
This special grade ensures that it remains fully soluble in ester-based reaction media, further reducing haze and improving the visual quality of the final products
Catalyst for low‑ and medium‑molecular‑weight polyester production, TIB KAT 248 LC promotes polycondensation reactions with high selectivity, ensuring consistent molecular weight distribution while minimizing by-product formation and solution haze
TIB KAT 248 LC is employed in the production of thermoplastic polyurethanes (TPU), where it helps polymerize monomers to create exible, high-performance materials used in automotive and industrial applications.
TIB KAT 248 LC is an organotin catalyst by TIB Chemicals.
TIB KAT 248 LC is used in paints and coatings.
TIB KAT 248 LC is used in the formulation of packaging lms, where it ensures the production of materials that oer barrier properties, improving product shelf life and protection.
TIB KAT 248 LC is used in the production of high-performance plastics for the electronics industry, where it helps create durable, heatresistant materials used in electronic components and devices.
TIB KAT 248 LC is used in the production of foamed polymers, where it helps create lightweight materials that provide excellent thermal and acoustic insulation properties.
Used in alkyd resin synthesis, TIB KAT 248 LC aids in the condensation of polyols, dibasic acids, and fatty acids or oils—including soy oil—to produce alkyds with excellent clarity, controlled viscosity, and enhanced drying behavior, even in formulations with higher renewable oil content
In coatings and paints, where visual quality is critical, TIB KAT 248 LC acts as a dependable catalyst, delivering rapid curing and cross-linking performance while maintaining the optical quality of clear or lightly tinted finishes .
During esterification and transesterification, especially in the manufacture of plasticizer esters or oleochemical products, its tendency to stay dissolved prevents turbidity and supports high-quality product clarity in final formulations
Across industrial applications—from coatings to plastisol and oleochemical processes—TIB KAT 248 LC ensures efficient cures, consistent molecular properties, and improved aesthetic quality, all while supporting the functional requirements of modern, eco-sensitive formulations.
Appearance: White to o-white crystalline solid
Odor: Odorless
Solubility: Insoluble in water; soluble in organic solvents (e.g., toluene, xylene)
Melting Point: Approx. 300°C (decomposes)
Density: Approx. 1.5 g/cm³
Reactivity: Highly active as an esterication and crosslinking catalyst
Stability: Thermally stable; moisture sensitive
TIB KAT 248 LC is a premium, special-grade version of the standard TIB KAT 248 catalyst, formulated to deliver the same powerful catalytic action of dibutyltin oxide (DBTO) while offering exceptionally high purity and clarity, which are especially important in applications sensitive to turbidity and haziness
TIB KAT 248 LC is highly soluble in ester-rich reaction environments, a quality that ensures minimal haze formation even when processing vegetable-oil–based feedstocks like soybean oil; this makes it ideal for clear polyester and alkyd resin systems
When used for low- to medium-molecular-weight polyester production, TIB KAT 248 LC accelerates polycondensation reactions while maintaining clarity and minimizing by-product and haze development
TIB KAT 248 LC is used in the production of medical-grade polymers, where it enables the creation of biocompatible materials for medical devices and implants.
TIB KAT 248 LC is employed in the synthesis of copolymers, where it allows precise control over the polymerization process, producing materials with custom properties for specic applications.
TIB KAT 248 LC is used in the formulation of high-strength thermoplastic elastomers, where it helps achieve the desired molecular weight and structural properties for use in automotive and industrial applications.
TIB KAT 248 LC is used in the production of wire coatings, where it helps improve the polymerization process to produce insulating materials with excellent performance under high temperatures.
TIB KAT 248 LC is applied in the manufacturing of polymeric composites, where it helps to create strong, lightweight materials used in aerospace, automotive, and construction industries.
TIB KAT 248 LC is a high-performance organotin catalyst primarily composed of dibutyltin oxide (DBTO), used in a wide range of chemical and industrial processes.
TIB KAT 248 LC is especially eective in promoting reactions such as esterication, transesterication, and the curing of resins, coatings, silicones, and polyurethane systems.
TIB KAT 248 LC oers consistent reactivity, thermal stability, and strong catalytic activity, making it ideal for applications requiring durable, cross-linked polymers.
TIB KAT 248 LC is a white to o-white crystalline powder or granule with no odor.
Uses:
TIB KAT 248 LC is primarily utilized as a highly effective catalyst in a wide variety of industrial chemical processes, particularly those involving polycondensation, esterification, and transesterification reactions.
Its role is crucial in enabling faster reaction rates, better control of molecular weights, and higher product purity—especially in formulations where optical clarity and low turbidity are required.
TIB KAT 248 LC is widely employed as a catalyst in the manufacture of polyester resins, especially those derived from vegetable oils such as soybean oil.
It promotes the polycondensation of polyols and dibasic acids or anhydrides, which results in polyester chains with controlled molecular weight and low polydispersity.
The catalyst’s high purity helps prevent haze formation, ensuring that the resulting polyester resins are clear and visually appealing.
These polyesters are used extensively in coatings, adhesives, and composite materials where transparency and durability are essential.
TIB KAT 248 is widely employed as a catalyst in the production of plasticizer esters such as DOP (dioctyl phthalate), DOA (dioctyl adipate), and DINP (diisononyl phthalate), where its activity enhances esterification and transesterification processes, leading to high yields and purer final products.
It is an effective catalyst for synthesizing polyester resins, especially complex saturated polyesters and polyester polyols used in coatings, adhesives, and composite materials; its catalytic efficiency ensures consistent polymer molecular weight and low levels of unwanted by-products .
TIB KAT 248 is used in the formation of alkyd resins, including “skinny,” medium-fat, and fatty alkyds, as well as urethane-modified and silicone-modified alkyd resins; through catalyzing polycondensation reactions involving polyols, acids, and oils, it contributes to improved viscosity control, drying behavior, and durability in paints and varnishes
Its versatility extends to polycarbonate production, where it enables the polycondensation of carbonate monomers, facilitating the manufacture of clear and heat-resistant polycarbonates .
In the production of alkyd resins—ranging from “skinny” resins with low oil content to medium-fat and fatty alkyds—TIB KAT 248 LC catalyzes the esterification and polycondensation reactions between polyols, fatty acids, and dibasic acids.
This leads to alkyd resins with well-controlled viscosity, drying properties, and hardness.
The catalyst is especially valued in formulations incorporating renewable oils, as it maintains clarity and minimizes turbidity even at higher oil levels.
Alkyd resins catalyzed by TIB KAT 248 LC are commonly used in paints, varnishes, and printing inks due to their excellent film-forming properties and gloss.
TIB KAT 248 LC is also used as a catalyst in the production of plasticizer esters, such as dioctyl phthalate (DOP), diisononyl phthalate (DINP), and other related esters.
It efficiently catalyzes the esterification and transesterification of alcohols and acids, ensuring high conversion rates and product purity.
The catalyst’s solubility in ester media helps maintain clear reaction mixtures, which is critical for producing plasticizers used in flexible PVC and other polymers where clarity and purity affect final product performance.
TIB KAT 248 LC is widely used in polyurethane systems for foam, adhesive, and elastomer curing.
TIB KAT 248 LC is included in coating systems to enhance crosslinking and lm durability.
TIB KAT 248 LC is employed in esterication and transesterication reactions in the production of plasticizers, lubricants, and esters.
TIB KAT 248 LC is used in silicone resin and RTV formulations to promote hydrolysis and condensation.
Safety Profile:
This chemical is considered toxic if swallowed, meaning that even small amounts ingested accidentally can cause serious health effects, including nausea, vomiting, and damage to internal organs.
Prolonged or repeated skin contact may lead to irritation, redness, and sensitization, with some individuals developing allergic skin reactions after exposure.
TIB KAT 248 LC is therefore essential to avoid direct skin contact and to use protective gloves and clothing when handling the substance.
Exposure of the eyes to TIB KAT 248 LC can cause serious eye irritation or even irreversible damage.
The substance can induce redness, pain, tearing, and blurred vision.
Immediate flushing with plenty of water and prompt medical attention are crucial if the eyes come into contact with the catalyst.
While dibutyltin oxide is a solid, fine dust or aerosols generated during handling or processing can irritate the respiratory tract if inhaled.
Symptoms may include coughing, sneezing, and shortness of breath.
In industrial environments, exposure to dust should be minimized through the use of adequate ventilation systems and respiratory protective equipment.
