DBTC – Dibutyltin Dichloride

Catalyst, Stabilizer and Additive – Versatile Applications

Dibutyltin dichloride (usually referred to simply as DBTC) is an organotin substance that appears colorless to slightly yellowish-brownish at room temperature. It is readily soluble in organic solvents such as benzene, toluene, ether and alcohols but is very difficult to dissolve in water. Decomposition (hydrolysis) occurs in hot water. Dibutyltin dichloride is flammable, low volatile and has a pungent odor.

Produced by reacting tetrabutyltin with tin(IV) chloride, DBTC is a catalyst and stabilizer with a wide range of applications and even acts as a fungicide.

Name Dibutyltin Dichloride
CAS 683-18-1
Formula C8H18Cl2Sn
Synonyms DBTC
DBTCl
Dibutylzinnchlorid
Dibutyldichlorstannan
Di-n-butylzinn dichlorid
Zinnbutylchlorid
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Fields of Application for DBTC

Dibutyltin dichloride areas of application are diverse, ranging from intermediate products for the production of other tin compounds to being the decisive component of important end applications on the other.

DBTC is for example, a precursor substance from which a number of other tin compounds are made, including products for coating container glass bottles. It serves as a processing aid, process regulator and ion exchanger.

As a catalytic active ingredient, it is used in esterification reactions, the production of silicones and polyurethanes, foam plastics, adhesives or sealants. In this way, dibutyltin dichloride is used in a wide variety of end products: thermal insulation and coatings, food packaging, medical devices or electronics. In silicones, it finds its way into sealants, paper coatings and even dental products.

For the modification of synthetic rubbers, DBTC is a reactive process additive that improves the solubility of the soot black additives in the compound.

Another area in which DBTC is processed is the light and heat stabilization of PVC plastics. Concentrations between 0.3% and about 3% are common here. End-use applications include, for example, packaging materials or textile products.

Product Variants

In addition to the normal DBTC, BNT also offers dibutyltin dichloride in various versions: In DIDP solution (diisodecyl phthalate) as a catalyst for adhesives based on polyurethane and for silicone sealants; or in xylene as a catalyst for the production of silicones.

BNT Product NameProduktvarianteShort Form
BNT-CAT 410Dibutyltin dichlorideDBTC
BNT-CAT 413Dibutyltin dichloride in XylolDBTC/Xylene

 

BNT-CAT 410

DBTC from the production of BNT is shipped in polyethylene-lined drums of 30 liters or in barrels of 205 liters. In the closed original packaging, it has a minimum shelf life of 6 months without loss of quality.

BNT-CAT 413

BNT-CAT 413 is a colorless liquid with an aromatic odor. It is not or only slightly miscible with water.

BNT-CAT 413 is shipped in steel cans with a polyethylene lining. If the original packaging remains closed, it can be stored for at least 6 months without loss of quality (storage temperature > 0 °C).

If stored at a temperature below 0 °C, crystallization may occur. To homogenize the product again, it must be heated at 35 to 40 °C for approx. 30 minutes before use.

 
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