Dibutyltin compounds

Dibutyltin compounds (abbreviated DBT after English dibutyltin ) are organotin compounds with two butyl groups .

presentation

Dibutyltin halides can be obtained in almost quantitative yield by comproportioning tetrabutyltin with tin halides:

${\displaystyle \mathrm {R_{4}Sn+2\ SnX_{4}\ {\xrightarrow {150\,{}^{\circ }C}}\ 2\ R_{2}SnX_{2}\ \ R=Butyl\ \ X=Cl,Br} }$

Dialkyltin dihalides form alkyltin hydroxides or oxides with water.

${\displaystyle \mathrm {R_{2}SnCl_{2}+H_{2}O\ {\xrightarrow {}}\ R_{2}SnO+2\ HCl\ \ R=Butyl} }$

use

Dibutyltin compounds are used as light and heat stabilizers for PVC . They are also used as catalysts in the production of polyisocyanates for polyurethane foams, lacquers, adhesives and sealants, in acrylic acid esters , silicones and silicic acid esters .

Representative

• Dibutyltin oxide (DBTO)
• Dibutyltin dichloride (DBTC)
• Dibutyltin dilaurate (DBTL, DBTDL)
• Dibutyl tin maleate
• Dibutyltin dithioglycolate
• Dibutyltin diacetate (DBTA)
• Dibutyl tin carboxylate

Individual evidence

1. ↑ GJM van der Kerk, JGA Luijten, JG Noltes: New results in organotin research . In: Angewandte Chemie . tape 70 , no. 10 , May 21, 1958, pp. 298 , doi : 10.1002 / anie.19580701004 .
2. ↑ A. Goldschmidt, H.-J. Streitberger: BASF Handbook Painting Technology . Vincentz Verlag, Hannover 2002, ISBN 3-87870-324-4 , p. 186 ( limited preview in Google Book search).
3. ↑ Dibutyltenne dilaurate - database entry from Kemi Swedish Chemical Agency ( Memento from September 26, 2015 in the Internet Archive )
4. ↑ Federal Environment Agency: TBT - Organotin Compounds - A Scientific Inventory, 2003 ( PDF file )
5. ↑ Poisons Information Monograph (PIM) for dibutyltine dichloride , accessed December 9, 2014.